GDS-220 - Multimeter GW Instek - Free user manual and instructions

Product Type	Digital Multimeter
Brand	GW Instek
Model	GDS-220
Display	LCD, 4000 counts
DC Voltage Range	400 mV to 600 V
AC Voltage Range	400 mV to 600 V
DC Current Range	400 µA to 10 A
Resistance Range	400 Ω to 40 MΩ
Capacitance Measurement	4 nF to 100 µF
Frequency Measurement	Up to 100 kHz
Diode Test	Yes
Continuity Test	Yes, with buzzer
Data Hold	Yes
Auto Power Off	Yes, after 15 minutes
Dimensions (H x W x D)	180 mm x 80 mm x 40 mm
Weight	Approximately 0.35 kg
Power Supply	9V battery (6F22)
Safety Rating	CAT II 600V
Accessories Included	Test leads, battery, manual
Operating Temperature	0°C to 40°C

Frequently Asked Questions - GDS-220 GW Instek

How do I measure DC voltage with the GW Instek GDS-220 multimeter?

Set the rotary switch to the DC voltage range (V with a straight line). Connect the black test lead to the COM terminal and the red lead to the V/Ω terminal. Place the probes across the circuit or component and read the display.

How do I measure resistance?

Turn the dial to the Ω position. Ensure the circuit is de-energized. Connect the test leads as for voltage measurement. Touch the probes to the resistor leads and read the resistance value on the display.

What does the continuity beep mean?

When the multimeter is set to continuity test (often indicated by a diode/sound symbol), a continuous beep indicates a closed circuit (low resistance, typically < 50 Ω). This is useful for checking wires and connections.

How do I replace the battery in the GDS-220?

Turn off the multimeter and remove the test leads. Locate the battery compartment on the back, remove the screw, lift the cover, replace the 9V battery, and reattach the cover. Dispose of old batteries properly.

Can I measure AC current with this meter?

Yes, to measure AC current, set the dial to the appropriate AC current range (A with a sine wave). Connect the test leads in series with the circuit. Do not exceed the maximum rated current for the selected range.

How accurate is the GW Instek GDS-220?

The accuracy varies by function. Typically, DC voltage accuracy is ±(0.5% of reading + 2 digits). Refer to the manual for detailed specifications for each range and function.

What safety precautions should I follow?

Always observe the voltage rating (CAT II 600V). Do not use the meter in wet conditions. Inspect test leads for damage before use. Start with the highest range and work down. Never measure voltage on circuits above the rated category.

How do I use the data hold function?

Press the 'HOLD' button to freeze the current reading on the display. This is useful when measuring in difficult positions. Press again to release the hold and continue live measurements.

Can I measure capacitance with the GDS-220?

Yes, set the dial to the capacitance range (F). Discharge the capacitor before measurement. Insert the capacitor into the dedicated input jacks (if available) or use test leads, noting polarity for polarized capacitors.

What is the auto power off feature?

The GDS-220 automatically turns off after approximately 15 minutes of inactivity to conserve battery life. To wake it up, press any button or turn the rotary switch. This can usually be disabled via the setup menu.

USER MANUAL GDS-220 GW Instek

Compact Digital Storage Oscilloscope and Digital Multimeter

GDS-200 and GDS-300 Series

USER MANUAL

GW INSTEK PART NO. 82DS-22000EA1

This manual contains proprietary information, which is protected by copyright. All rights are reserved. No part of this manual may be photocopied, reproduced or translated to another language without prior written consent of Good Will company.

The information in this manual was correct at the time of printing. However, Good Will continues to improve products and reserves the rights to change specification, equipment, and maintenance procedures at any time without notice.

Table of Contents

SAFETY INSTRUCTIONS 5

GETTING STARTED 10

GDS-200 and GDS-300 Series Overview 12

Appearance....15

Initial Setup 30

OPERATION 37

Gesture Control 41

Common Menu UI Elements 47

Vertical Menu Operation 50

Trigger Menu Operation....66

Trigger Setting 68

Run Mode 80

Cursor Measurements....83

Automatic Measurements 86

Drop-Down Menu 94

Utility Menu....96

Acquire Menu 107

Display Menu....112

Go-NoGo Menu 118

Save Operations 124

Recall Operations 135

File Manager.... 139

DMM Mode 143

EE APPs 154

REMOTE CONTROL CONFIG ....164

Interface Configuration 165

FAQ 171

APPENDIX 173

Firmware Update 175

Fuse Replacement 176

Resistor Standards....177

GDS-200/300 Default Settings ..... 180

GDS-200/300 Specifications...... 181

GDS-200/300 Dimensions....185

Declaration of Conformity 186

INDEX....187

SAFETY INSTRUCTIONS

This chapter contains important safety instructions that you must follow during operation and storage. Read the following before any operation to insure your safety and to keep the instrument in the best possible condition.

Safety Symbols

These safety symbols may appear in this manual or on the instrument.

WARNING

Warning: Identifies conditions or practices that could result in injury or loss of life.

CAUTION

Caution: Identifies conditions or practices that could result in damage to the instrument or to other properties.

DANGER High Voltage

Attention Refer to the Manual

Do not dispose electronic equipment as unsorted municipal waste. Please use a separate collection facility or contact the supplier from which this instrument was purchased.

Safety Guidelines

General Guideline

CAUTION

• Do not place any heavy object on the instrument.
• Avoid severe impact or rough handling that leads to damaging the instrument.
• Do not discharge static electricity to the instrument.
• Use only mating connectors, not bare wires, for the terminals.
• Do not block the cooling fan opening.
• Do not disassemble the instrument unless you are qualified.
• Do not use sharp objects or press with undue force on the touch screen display.
• Do not apply more than 300Vrms (CAT II, DSO inputs); 600V (CAT II, DMM inputs) or 300V (CAT III, DMM inputs).

(Measurement categories) EN61010-1:2010, EN61010-2-030 and EN61010-2-033 specify the measurement categories and their requirements as follows. The GDS-200/300 falls under category II & III.

• Measurement category IV is for measurement performed at the source of low-voltage installation.
• Measurement category III is for measurement performed in the building installation.
• Measurement category II is for measurement performed on the circuits directly connected to the low voltage installation.
• Measurement category 0 is for measurements performed on circuits not directly connected to Mains.

AC Adapter Power Supply (AC Mains)WARNING	AC Input voltage range: 100VAC-240VACFrequency: 47Hz-63HzOutput: 12 DCV, 36W MaxTo avoid electrical shock connect the protective grounding conductor of the AC power cord to an earth ground.
Power Supply (DC)	DC Input voltage range (10.5-13.5 V DC, 3A)
Cleaning the Instrument	Disconnect the power cord before cleaning.Use a soft cloth dampened in a solution of mild detergent and water. Do not spray any liquid.Do not use chemicals containing harsh material such as benzene, toluene, xylene, and acetone.
Operation Environment	Location: Indoor, no direct sunlight, dust free, almost non-conductive pollution (Note below)Relative Humidity: 20%-85%Altitude: < 2000mTemperature: 0°C to 50°C(Pollution Degree) EN 61010-1:2010 specifies the pollution degrees and their requirements as follows. The instrument falls under degree 2.Pollution refers to “addition of foreign matter, solid, liquid, or gaseous (ionized gases), that may produce a reduction of dielectric strength or surface resistivity”.Pollution degree 1: No pollution or only dry, non-conductive pollution occurs. The pollution has no influence.Pollution degree 2: Normally only non-conductive pollution occurs. Occasionally, however, a temporary conductivity caused by condensation must be expected.Pollution degree 3: Conductive pollution occurs, or dry, non-conductive pollution occurs which becomes conductive due to condensation which is expected. In such conditions, equipment is normally protected against exposure to direct sunlight, precipitation, and full wind pressure, but neither temperature nor humidity is controlled.
Storage environment	· Location: Indoor · Temperature: -25°C to 70°C · Relative Humidity: <90%
Disposal	Do not dispose this instrument as unsorted municipal waste. Please use a separate collection facility or contact the supplier from which this instrument was purchased. Please make sure discarded electrical waste is properly recycled to reduce environmental impact.
Battery	· Type: Rechargeable Li-ion polymer · Model: FT8862103P · Manufacturer: Chinese Precision Technology (Assembled in China) · Rating: 7.4Vdc ===, 6100mAh (45 Watt)
Battery Caution	· The internal battery should not be replaced by the end-user. Please return the unit back to your local dealer for assistance. · Never allow the battery to come in contact with fire or water. · Discard used batteries according to the manufacturer's instructions or local laws. · Read the manual before use.

Power cord for the United Kingdom

When using the instrument in the United Kingdom, make sure the power cord meets the following safety instructions.

NOTE: This lead/appliance must only be wired by competent persons

WARNING: THIS APPLIANCE MUST BE EARTHED

IMPORTANT: The wires in this lead are coloured in accordance with the following code:

Green/ Yellow: Earth

Blue: Neutral

Brown: Live (Phase)

As the colours of the wires in main leads may not correspond with the coloured marking identified in your plug/appliance, proceed as follows:

The wire which is coloured Green & Yellow must be connected to the Earth terminal marked with either the letter E, the earth symbol or coloured Green/Green & Yellow.

The wire which is coloured Blue must be connected to the terminal which is marked with the letter N or coloured Blue or Black.

The wire which is coloured Brown must be connected to the terminal marked with the letter L or P or coloured Brown or Red.

If in doubt, consult the instructions provided with the equipment or contact the supplier.

This cable/appliance should be protected by a suitably rated and approved HBC mains fuse: refer to the rating information on the equipment and/or user instructions for details. As a guide, a cable of 0.75mm^2 should be protected by a 3A or 5A fuse. Larger conductors would normally require 13A types, depending on the connection method used.

Any exposed wiring from a cable, plug or connection that is engaged in a live socket is extremely hazardous. If a cable or plug is deemed hazardous, turn off the mains power and remove the cable, any fuses and fuse assemblies. All hazardous wiring must be immediately destroyed and replaced in accordance to the above standard.

GETTING STARTED

This chapter will allow you to quickly set up a GDS-200 or GDS-300 series oscilloscope and run over the basic operation and features.

Before you can get started, you will need to check the package contents (standard accessories, page 14). After the contents are checked the Overview section will describe all the major features and functions of the oscilloscopes in the GDS-200 and GDS-300 series. The Appearance section will go over the front, rear and side panels of the instrument. The Display Overview will give a brief introduction to the display and how the display changes depending on the current function, orientation or mode. Lastly the Getting Started section will explain how to turn on the instrument, explain how to set up the instrument, and go over the gestures and operating conventions that are used with the capacitive touch panel on the unit.

GDS-200 and GDS-300 Series Overview....12

Series Lineup 12

Main Features....12

Accessories....14

Appearance.... 15

GDS-200/300 Front Panel....15

Rear Panel....17

Interface Panel....18

BNC Panel 20

Display Overview....21

Horizontal 21

Vertical....22

How to Use the Touch Interface....25

Help Menu....28

Initial Setup 30

Power Up 30

USB Driver Installation 31

Tilting the Stand....32

Setting the System Date & Time 33

Setting the Language 34

Switching Horizontal and Vertical View....34

Compensating a Probe 34

GDS-200 and GDS-300 Series Overview

Series Lineup

There are 6 models in the series, divided by DSO bandwidth, DSO memory depth, DMM digit resolution and the DMM temperature function.

Model name	Bandwidth	Memory depth	DMM Resolution	Temperature measurement
GDS-207	70MHz
GDS-210	100MHz	1M points per channel	312	No
GDS-220	200MHz
GDS-307	70MHz
GDS-310	100MHz	5M points per channel	412	Yes
GDS-320	200MHz

Note: Throughout the user manual, when we are referring to any of the models generically, we will write “GDS”, “GDS-200” or “GDS-300”, unless explicitly stated otherwise.

Main Features

Performance

• 1 G Sa/s sampling rate max
• 70/100/200MHz bandwidth
• Acquisition memory: 5Mpts for GDS-300 series; 1Mpts for GDS-200 series
- Max 300Vrms (CAT II, DSO); 600V (CAT II) or 300V (CAT III) for DMM
• 30,000 Waveforms can be replayed

Features

• Simultaneous DMM and DSO operation
• Portrait and landscape modes
- Large 800 x 480 TFT panel and capacitive touch panel
- 7.4V/6100mAh battery for up to 4 hours operation
• Support for differential probes
- Handy APPs – EE calculator, Resistance calculator, Attenuation calculator
• Shielded BNC terminals

- DSO Features

• X-Y mode
• Go/No Go
  • 36 automatic measurement functions
• Trend plot
• Edge, Alt, Video and Pulse trigger functions
• FFT, FFTrms, +, -, /, * math functions
• Replay function

• DMM Features

• 50,000 counts
• DCV, DCA, ACV, ACA, R, Diode, Continuity, Temperature
• Fuse protection for the current ports

Interface

- Mini-B USB device port

Accessories

Standard Accessories	Part number	Description
		Certificate of calibration
	82DS-2200E01	User manual CD
	GAP-001	AC-DC adapter
	GTP-100A-4	100MHz Probe. for GDS-207 /307, GDS-210 /310
	GTP-200A-4	200MHz Probe. for GDS-220 /320
	GTL-207	Multimeter test lead x2
	GSC-010	Soft carrying case (large)
	GSC-011	Protection bag (small)
	GWS-001	Wrist strap
Optional Accessories	Part number	Description
	GDP-040D	Dual-channel Differential Probe, Only for GDS-200/300
	GTL-253	Type A - Mini-B USB cable
	GCL-001	Vertical Calibration cable
Download	Name	Description
	dso_vpo.inf	USB driver

Appearance

GDS-200/300 Front Panel

Display Color LCD screen, 800 x 480, capacitive touch.

Interface Panel The interface panel holds a number of different interfaces such as the input power socket, USB device port and the options power port. See page 18 for details.

DMM Ports

mA

Accepts up to 600mA.

Fuse protection: 1A.

A

Accepts up to 10A.

Fuse protection: 10A

COM

Com port

Voltage, Resistance and Diode port.

Max voltage: 600V

Rear Panel

Vent Do not block the vent opening.

Vertical Stand Use the vertical stand to position the unit vertically.

Horizontal Stand Use the horizontal stand to use the unit horizontally.

Interface Panel

Power Switch

Power switch to turn the unit on or off.

DC input. This port is used for charging the internal lithium battery. Accepts power from the supplied AC-DC power adapter.

Input Voltage: 10.5V - 13.5V Input Current: At least 3.5A.

USB Device Port

Mini-B USB device port. This port is used access the internal 120MB flash memory. When connected to a PC, the GDS-200/300 will be recognized as an external hard disk.

Calibration Port

The calibration port is used to output a 2Vpk-pk 1kHz square wave for probe calibration purposes.

Internal Use Port

Simple line drawing of a rectangular device with circular and triangular symbols on the sides (no text or labels)

This panel houses two ports that are for internal use only. Use of these ports are restricted and not for end-user use.

External Power Port.

This port supplies power for optional accessories such as the differential probe option (GW part number: GDP-040D

Voltage output: 5V Current output: 250mA

BNC Panel

CH2 inputT

CH1, CH2 Inputs Channel 1 and channel 2 BNC inputs.

Input impedance: 1MΩ

Input Capacitance: 16.5pF

Max voltage: 300V max (CAT II)

Tapped Hole

The tapped hole is used to secure the differential probe option to the GDS-200/300. See the differential probe manual for details.

Display Overview

Horizontal

Vertical

In order: Input frequency, trigger state, time, horizontal position, acquisition mode, trigger level, battery indicator.

Input Frequency	Displays the triggered signal frequency.
Trigger State	Indicates the trigger state:Trig'd (triggered)Stop<2Hz
Date and Time	Displays the date (horizontal only) and time.See page 33 to set the time.
Horizontal Position	Shows the horizontal position.
Acquisition Mode	Displays the acquisition mode (Sample, Peak Detect, Average)
Horizontal Window Indicator	Shows the current horizontal scale and position in relation to the record length.
Drop Down Menu Area	Tapping anywhere in the title bar will trigger the drop down menu.
Gesture Control Menu	The gesture control menu allows you to configure whether the touch gestures control the input waveforms or the cursors. This menu will also turn the cursor display on or off.
Channel Indicators	The channel indicator shows the vertical position of each active channel.
Trigger Indicator	Selects the trigger input channel and selects the trigger source.
Vertical Scale	Shows the vertical scale of each active channel. Indicates whether any of the reference or math channels are activated.
Horizontal Scale	Indicates the horizontal scale and the sampling rate.
Trigger Mode	Shows and configures the trigger settings.
Automatic Measurements	Shows the automatic measurements. The automatic measurements can be minimized or hidden when used in the horizontal mode.
DMM Measurements	Shows the DMM measurements. When in the horizontal view the DMM measurements can be minimized or even hidden.
Hardcopy Key	The Hardcopy key is used as a quick-save key either for image screenshots, waveforms, setup files or all of the above.
Run Mode(Backward, Run/Stop, Forward, Single)	The Run/Stop key is used to start/stop acquiring samples. The Forward/Backward keys step backward/forward through each consecutively sampled waveform. The Single key puts the trigger into single mode.
Autoset	The Autoset function automatically configures the panel settings to position the input signal to the best viewing condition.

How to Use the Touch Interface

Background

Unlike other oscilloscopes or digital multimeters, the GDS-200 and GDS-300 Series have no physical hardware keys, therefore operation is completely controlled using the capacitive touch screen. Using a capacitive touch screen is a new interface paradigm for DSOs; the gestures and general user interface is easier to use and more intuitive than traditional DSO interfaces. Before you begin to use these instruments, we highly recommend you take a few moments to get to know the basic gestures and interface conventions.

Basic Gestures

There are a few basic gestures that can be used to operate the GDS-200/GDS-300. When asked to perform a gesture throughout the user manual, you can refer to the gestures below.

Tap / Press

Tap/Press once to select an item.

The gesture will be recognized after you lift your finger off the display.

Long Press / Tap & Hold

Press and hold an item until a sub-menu system or secondary option appears.

Swipe

Illustration of a hand interacting with a digital oscilloscope displaying waveforms (no text or symbols visible)

Horizontally swipe on the screen.

Scroll

Illustration of a hand interacting with an oscilloscope displaying waveforms (no text or symbols visible)

Drag your finger vertically on the screen to scroll.

Pinch In

Pinch the screen to zoom out (make the waveforms smaller), or spread your fingers apart to zoom in (make the waveforms larger).

Pinch Out

Drag and drop

Drop Drag

Drag an item to an option and let go*.

*The drag and drop gesture is usually used in the Horizontal, Vertical or Trigger menu to manually set a positional value.

Help Menu

Background

If at any time you are not sure how to use a particular function, the help icon can be used to put an overlay on the screen to show the basic function of each icon.

Steps

Tap the title bar on the top of the LCD display to bring up the Drop Down menu.

Tap on the Utility icon.

Tap on the Help option in the Utility menu.

The help screen overlay is shown on the display. There are three help screens. Use the numbered icons, 1, to view the corresponding help screen. Use the exit icon to exit from the help screen.

graph TD
    A["Start"] --> B{Step 1: Tap to trigger the switch screen for command within the waveform parameters on the waveform output}
    B --> C{Step 2: Check as well horizontally to change the direction}
    C --> D{Step 3: Check horizontally to change the horizontal position}
    D --> E["End"]

Initial Setup

This chapter should be used to set up the instrument when used for the first time or if the firmware has been updated.

Power Up

Requirements	Before the unit is powered up for the first time, it is recommended that the unit is first fully charged.
Steps	Plug the AC-DC power pack into the mains outlet.Connect the 12V plug into the 12V socket on the interface panel of the GDS-200/300.The unit will begin charging. An orange battery indicator light indicates charging, while green indicates charged. Battery indicator4. Slide the power switch to the ON position, located on the interface panel.5. The unit will turn on in a short while.

1. The battery indicator is shown on the top right-hand corner of the main display.

USB Driver Installation

Background

The GDS-200/300 has a USB device driver that should be installed to get the most out of the unit.

Installation

1. Turn off the GDS-200/300.

2. When the PC is on, connect the USB cable from the GDS-200/300 to the PC.

3. Turn the GDS-200/300 on.

4. Access the Menu tray by pressing the title bar. Go to Utility>USB device port and set the device port to Communication.

5. The PC will now recognize the unit as a new device and ask to search for the driver.

6. Direct the driver installation wizard to the USB device driver (dso_vpo.inf) on the User Manual CD.

7. The GDS-200/300 will now be recognized as a virtual com port (VCP).

Tilting the Stand

Horizontal

Black-and-white photo of a handheld electronic device displaying an abstract diagram on its screen (no readable text or symbols)

To tilt the stand horizontally, pull the catch from the smaller of the two stands.

Vertical

To tilt the stand vertically, release the catch from the larger of the stands.

Setting the System Date & Time

Background

The GDS-200/300 will keep the date and time settings saved so long as the battery is not allowed to fully discharge.

1. Access the Menu tray by tapping the title bar.

2. Press Utility>System>Date&Time.

The Date&Time menu will appear.

1. To set the date, press Date and use the number picker to set the year, month and day.

2. To set the time, press Time and use the number picker to set the hour and minute.

3. Press OK to save the date and time settings.

Note

The date and time settings only remain saved if the battery is not fully drained. However, if the unit shuts down due to insufficient battery power, there will usually still be enough battery power to keep the internal clock running for sometime.

Setting the Language

Background	The GDS-200/300 menu system can be set to display a number of languages.
	1. Access the Menu tray by tapping the title bar.2. Press Utility>System>Language.The Language menu will appear.3. To set the language, press your preferred language.

Switching Horizontal and Vertical View

Background	By default the GDS-200/300 is set to the vertical view.
Switch View	1. Tap the title bar to access the Menu tray.2. Press the icon to toggle between horizontal and vertical view.

Compensating a Probe

Background	To demonstrate connecting the probes, we will use the 1kHz calibration signal on the interface panel and compensate the probe from this signal.
Connection	1. Connect a probe to the CH1 BNC terminals.

1. Set the probe attenuation to x10 on the probe.

2. Connect the probe to the 2V calibration signal. The calibration signal outputs a 1kHz, 2Vpp square wave signal.

1. Press the

2. Select CH1, if it is not already selected.

3. Press the option icon.

4. Press Probe and set the probe to 10X.

5. Exit from the Vertical menu (tap anywhere outside the Vertical menu).

6. Press the Asset set button on the bottom corner of the screen.

7. The calibration signal is displayed on the screen.

8. Tap the title bar to access the Menu tray.

9. Press Display>Type and select Vector as the

interpolation type.

1. Turn the adjust point on the probe until the probe is properly compensated.

Under Compensation

Pure geometric lines forming an L-shape with no text, numbers, or symbols

Normal

Simple line drawing of a downward curve with vertical tick marks (no text or symbols)

Over Compensation

Diagram of a medical or surgical device with a screw inserted, showing internal components and a rotation arrow (no text or symbols)

PERATION

Gesture Control.... 41

Select a Channel, Math or Reference Waveform......41

Set the Vertical Position of the Selected Waveform 42

Set the Vertical Scale of the Selected Waveform....43

Set the Horizontal Position 44

Set the Horizontal Scale....45

Select the Trigger Source and the Trigger Level....46

Common Menu UI Elements.... 47

Radio Check Boxes....47

Toggle Switches....47

Sliding Scales....47

Value Picker....48

Keyboards and Keypads 48

Vertical Menu Operation 50

Vertical Icon Overview....50

Entering the Vertical Menu....51

Channel or Reference/Math Waveform Selection and Activation....51

Vertical Scale and Position 52

Vertical Options – Channel....53

Vertical Options - Reference Waveforms....56

Vertical Options - Math....56

Horizontal Position 59

Horizontal Expansion....60

Zoom....63

Trigger Menu Operation 66

Trigger Icon Overview....66

Entering the Trigger Menu....67

Trigger Setting.... 68

Trigger Types....68

Trigger Parameters and Settings 69

Trigger Mode....71

Forced Trigger....72

Alternate Trigger....72

Trigger Level 73

Edge Trigger....74

Pulse Trigger....76

Video Trigger 77

Autoset 78

Run Mode 80

Run/Stop and Single Key Overview....80

Run/Stop Mode....81

Single Mode 82

Cursor Measurements 83

Using Cursors....83

Automatic Measurements....86

Measurement Types....86

Viewing Automatic Measurements....89

Selecting an Automatic Measurement....90

Automatic Measurement Options....92

Drop-Down Menu.... 94

Opening the Drop-down Menu....94

Return to Default Settings....94

Panel Lock 95

Utility Menu 96

Accessing the Utility Menu....96

Set the Language 96

View System Information....97

Signal Path Compensation....98

Setting the System Date & Time 99

Touch Sounds ....100

Erase Memory....100

Configure the Hardcopy Function....100

Configure USB Device Port....102

Configure Autoset Mode....103

Set Ruler....104

Calibration 105

Acquire Menu....107

Accessing the Acquisition Menu....107

Select Acquisition Mode 108

Show Waveform in XY Mode 109

Set the Record Length....110

Set the Interpolation....111

Display Menu....112

Accessing the Display Menu 112

Display the Waveform as Dots or Vectors 112

Set the Level of Persistence....113

Set the Waveform Intensity....114

Set the Graticule Intensity....115

Set the Graticule Type....116

Set the Brightness Level....117

Go-NoGo Menu....118

Accessing the Go-NoGo Menu....118

Configuring the Go-NoGo Menu....118

Running a Go-NoGo Test....122

Save Operations....124

Accessing the Save Menu....124

Saving and Configuring Image Files....125

Saving and Configuring Waveform Files....128

Saving and Configuring Setups....131

Saving and Configuring Images, Waveforms and Setups All at Once......133

Recall Operations....135

Accessing the Recall Menu....135

Recalling Waveform Files 135

Recalling Setups 138

File Manager....139

Accessing the File Manager....139

Navigating the File System....140

DMM Mode....143

Accessing the Multimeter 143

Multimeter Display Overview....145

AC/DC Voltage Measurement....145

Current Measurement ...... 146

Resistance Measurement....147

Diode Measurement....149

Continuity Measurement....150

Temperature Measurement....152

EE APPs 154

Accessing the EE Apps 154

Attenuator Calculator....155

Advanced DMM 156

Calculator....158

QR Code Link App....159

Resistance Calculator....159

Gesture Control

This chapter will go over all of the basic touch gestures that are available using the default settings. The touch gestures cover all the most frequently used operations that an engineer uses, allowing the GDS-200/300 to operate completely without panel keys or knobs.

The gestures described below are only applicable if "Waveform" is selected as the gesture control method. See page 83 for details.

Select a Channel, Math or Reference Waveform

Background	Any channel, math waveform or reference waveform that has already been turned on can be selected from the left of the grid. See page 51 to turn on a waveform, math function or waveform.
Steps	To select the active waveform, tap the desired channel, math or reference indicator.When selected, the icon will become a solid triangle.

Example

Set the Vertical Position of the Selected Waveform

Background	The touch screen can be used to conveniently set the vertical position of the selected waveform.
Steps	Swipe the screen vertically to set the vertical position of the selected waveform.The vertical position will also be shown in a popup window.The waveform will automatically snap to the zero position at each crossing. To move past the zero position, use the swipe gesture again.Tapping the upper or lower part of the screen will also increase/decrease the vertical position.

Example

Set the Vertical Scale of the Selected Waveform

Background	The touch screen can be used to conveniently set the vertical scale of the selected waveform. To set other vertical scale options, see from page 53
Steps	Pinch in/out vertically to set the vertical scale of the selected waveform.A scale indicator will popup to show the current scale in relation to full vertical scale range.When the scale indicator appears, simply tapping the upper or lower half of the screen will also change the vertical scale.The vertical scale (as a value) is shown in the bottom left-hand side of the display.

Example

Set the Horizontal Position

Background	The touch screen can be used to conveniently set the horizontal position.
Steps	Swipe the screen horizontally to set the horizontal position of the displayed waveforms.The horizontal indicator is a solid orange triangle at the top to the grid.The horizontal position (as a value) is shown at the top of the grid.The waveform will automatically snap to the zero position at each crossing. To move past the zero position, use the swipe gesture again.

Example

Horizontal Position

Set the Horizontal Scale

Background	The touch screen can be used to conveniently set the horizontal scale of the displayed waveforms. To set other horizontal scale options, see page 60.
Steps	Pinch in/out horizontally to set the horizontal scale of the display.A scale indicator will popup to show the current scale in relation to full horizontal scale range.When the scale indicator appears, simply tapping the left or right-half of the screen will also change the horizontal scale.The horizontal scale (as a value) is shown in the bottom left-hand side of the display.

Example

Select the Trigger Source and the Trigger Level

Background

The touch screen can be used to conveniently select the trigger source as well as set the trigger level.

Select Trigger Source

Tap on the trigger level indicator to toggle between trigger sources.

Set the Trigger Level

Swipe the screen to the right of the grid to set the trigger level with the currently selected source.

The trigger level will also be shown in a popup window.

Example

Common Menu UI Elements

This section will give a brief overview of some of the common UI elements that are used to select parameters and values in menus. Not all of the UI elements look the same but will have similar functions. User interface elements that are not shown below will be specifically shown in the user manual.

Radio Check Boxes

Background

A radio checkbox allows a single option to be selected.

Example

Toggle Switches

Background

Toggle switches are used to turn options on or off.

Example

Sliding Scales

Background

Sliders are used to quickly enter a value, on a sliding scale. They are usually accompanied by some common preset value buttons.

Example

Slider Preset value button

Value Picker

Background

Value pickers are used to enter discrete values. They are usually accompanied by some common preset value buttons.

Example

Keyboards and Keypads

Background

Software keyboards and keypads are used to enter specific values. Keyboards are used to enter letters and numbers, such as making text notes or files names. Keypads are used to enter values, such as the horizontal position.

Example: keypad

When using a keypad:

• Select the unit
• Enter the value using the keypad
• Press Enter to confirm the entered value.

Example: Keyboard

When using the keyboard:

• The text entry area will display the text that is entered.
• The +=# key will bring up a symbol keyboard
• The ABC/Language key will bring up the alphanumeric or native language keyboard.
• Press Enter to go to the next line.
• Press OK to finish entering the text.

Vertical Menu Operation

The vertical menu controls the vertical scale and position, channel activation, coupling, expansion modes and probe settings.

Vertical Icon Overview

Major settings that have been set in the vertical menu will be reflected in the Vertical icon.

Item	Description
Channel Status	Indicates if a channel is turned on.
Coupling	Indicates DC, AC or GND coupling.
Vertical Scale	Indicates the vertical scale.
Bandwidth	Indicates the bandwidth limit is turned on for that channel.
Limit Status
Invert Status	Indicates that the channel waveform is inverted.
Reference	Indicates that either R1 or R2 is turned on.
Indicator
Math Indicator	Indicates that the Math function is turned on.

Entering the Vertical Menu

Steps

1. Press the vertical icon to bring up the vertical menu.

2. The Vertical Menu appears.

Vertical icon

Channel or Reference/Math Waveform Selection and Activation

Turning a Channel On

From the vertical menu press the icon of the desired channel, reference waveform or math waveform to turn the channel on or to select the channel as the active channel.

- When activated the channel icon will be colored.

- The active channel will have an orange ring around the channel icon.

- Channels that are turned off will be grayed-out.

Example

Selected/active channel Disabled channels
Activated channels

Vertical Scale and Position

Background	The vertical scale and position can be configured in the vertical menu in addition to the using the touch gestures.
Touch Control	Select the desired channel, reference waveform or math function. Page 41
Note	Position: When using touch control, the waveform will automatically snap to the zero position at each crossing. To move past the zero position, use the swipe gesture again.
Menu Control	Use the scale picker to set the vertical scale for the selected channel.Use the position slider to set the vertical position for the selected channel.To set the vertical position to 0, drag from the Vertical Position key and drop to the “Set to 0” option.To manually set the vertical position, drag from the Vertical Position key and drop to the keyboard icon. Type in the value for the vertical position with the keypad that appears.

Vertical Options – Channel

Background

The Options menu in the Vertical menu allows you to set the coupling, invert waveforms, turn the bandwidth limit on, set the expansion mode and set the probe attenuation.

Setup

1. Select a channel by tapping on the corresponding channel icon. Page 51

2. Press the Options icon to bring up the vertical options.

The vertical options for the selected channel/waveform will be displayed.

Coupling

1. Press Coupling to set the coupling for the selected channel.

2. Choose the coupling type in the Coupling menu that appears.

	Coupling DC, AC, GND
Invert	Press the Invert toggle switch to invert the waveform for the selected channel.
Bandwidth Limit	Press the Bandwidth Limit toggle switch to turn the bandwidth limit on or off.
	Bandwidth limit 20MHz, Off
Expand	When the voltage scale is changed, the Expand function designates whether the signal expands from the center of the signal or from the signal ground level. Expand by Center can be used to easily see if a signal has a voltage bias. Expand by Ground is the default setting.
	1. Press the Expand key to set the expand mode for all the displayed waveforms.
	2. Choose the expansion type in the Expand menu that appears.
	Expand By Center, By Ground
Example	Expand by Ground	Expand by Center

Note

If the vertical scale is changed when the Expand function is set to ground, the signal will expand from the ground level. The ground level position does not change when the vertical scale is changed.

If the vertical scale is changed when the Expand function is set to center, the signal will expand from the center of the waveform window. The ground level position will suit to match the signal position.

Probe

This menu sets the probe attenuation and the probe type.

Press Probe and set the probe parameters for the chosen channel in the Probe menu that appears.

Probe Type	Voltage, Current
Probe attenuation	0.001X - 1000X(1-2-5 step resolution)
	10X (preset)

Vertical Options – Reference Waveforms

Background	The Options menu in the Vertical menu allows you to view the selected reference waveform sample rate, record length and creation date.
Setup	1. Select a reference by tapping on the corresponding R1 or R2 icon.Page 51
	2. Press the Options icon to bring up the vertical options.
	The data for the selected reference waveform will be displayed.
Note	The reference waveforms can only be recalled if they have been saved first.

Vertical Options – Math

Background

When Math (M) is selected, the Options menu in the Vertical menu allows you to set the math mode, source operators, units and windowing function.

Setup

1. Select the math channel by selecting Page 51 the M icon.

2. Press the Options icon to bring up the math settings.

Math

1. Press the Math tab to reveal the math options.

2. From the Math tab select the sources and the math operator.

Source 1	CH1, CH2, Ref1, Ref2
Operator	+, -, ×, ÷
Source 2	CH1, CH2, Ref1, Ref2

FFT

1. Press the FFT tab to reveal the FFT math options.

2. From the FFT tab select the source, units and FFT window function.

Source 1	CH1, CH2, Ref1, Ref2
Operator	dBV RMS, Linear RMS
Window	Hanning, Rectangular, Hamming, Blackman

Example

Math details

The Math icon can be expanded to show the sources, volt/div and offset of the Math function. Press the Math icon to toggle between the collapsed and expanded Math icon.

Collapsed Expanded

Horizontal Position

Background

The horizontal scale and position can be configured in the Horizontal menu in addition to the using the touch gestures.

Menu Control

1. Press the 500us 2MSPS Horizontal key to access the Horizontal menu.

2. Press Main to set the scope to the main window mode.

Horizontal icon

1. From the Main horizontal menu the horizontal scale and position can be configured.

2. Use the scale picker to set the horizontal scale.

3. Use the position slider to set the horizontal position.

4. To set the horizontal position to 0, drag from the Horizontal Position key and drop to the "Set to 0" option.

5. To manually set the horizontal position, drag from the Horizontal Position key and drop to the keyboard icon. Type in the value for the horizontal position with the keypad that appears.

Touch Control

1. Swipe the screen to set the horizontal Page 44 position.

2. Use a pinch gesture to increase or decrease the horizontal scale. Page 45

Position: When using the touch screen to set the horizontal position, it will automatically snap to the zero position at each crossing. To move past the zero position, use the swipe gesture again.

Horizontal Expansion

Background

The Options menu in the Horizontal/Zoom menu allows you to set the horizontal expansion mode.

There are two horizontal expansion options: By Center and By Trigger Position.

By Center

Scales the waveform from the center of the display.

By Trigger Position

Scales the waveform from the trigger position.

Steps

1. Access the Horizontal or Zoom menu.

Page 59 or 63

1. Press the Options icon to bring up the Horizontal options menu.

The expansion settings will be displayed.

1. Choose the expansion type in the Expand menu that appears.

Expand By Center, By Trigger Position

Example: By Center

Trigger position

Example: By

Trigger Position

Trigger Position

Zoom

Background

The Zoom menu can be accessed from the Horizontal menu.

Setup

1. Press the 500us 2MSPS Horizontal key to access the Horizontal menu.

2. Press Zoom to set the scope to Zoom window mode.

Horizontal icon

1. From the Zoom horizontal menu the zoom scale and zoom position can be configured.

Menu Control

1. Use the scale picker to set the horizontal scale for the zoom window.
2. Use the position slider to set the horizontal position for the zoom window.
3. To set the zoom position to 0, drag from the Zoom Position key and drop to the "Set to 0" option.
4. To manually set the zoom position, drag from the Zoom Position key and drop to the keyboard icon. Type in the value for the zoom position with the keypad that appears.

Touch Control

1. The zoom window can be zoomed in and out using a horizontal pinch.

2. The horizontal position of the zoom window can be moved by swiping the screen left or right.

Note

Position: In the main display, the zoom window will automatically snap to the zero position at each crossing. To move past the zero position, use the swipe gesture again.

Trigger Menu Operation

The Trigger menu controls the trigger position, trigger type and trigger modes.

Trigger Icon Overview

The settings that have been set in the Trigger menu will be reflected in the Trigger Menu Icon.

Item	Description
Trigger Source	Shows the trigger source channel. CH1, CH2
Trigger Coupling	Shows the trigger coupling. AC Coupling, DC Coupling
Noise Rejection	Indicates that noise rejection is activated
Frequency rejection	Indicates that high or low frequency rejection is activated. HFR = high frequency rejection LFR = low frequency rejection
Alternate trigger indicator	Indicates that the alternate trigger is activated.
Slope, polarity or condition	This area will display the current trigger conditions:
	Edge	Rising slope, Falling slope, Either slope
	Pulse	Falling edge, Rising edge
	Video	NTSC, PAL, SECAM

Entering the Trigger Menu

Steps

1. Press the HFR icon to bring up the Trigger menu.

2. The Trigger menu appears.

Example

Trigger menu

Trigger icon

Trigger Setting

Trigger Types

The trigger configures the conditions for when the GDS-200/300 captures a waveform.

Edge

The edge trigger is the simplest trigger type. An edge trigger triggers when the signal crosses an amplitude threshold with either a positive or negative slope.

Pure electrical circuit lines without any symbols

Rising edge trigger

Triggers when the pulse width of the signal is less than, equal, not equal or greater than a specified pulse width.

Pulse width

Video

Extracts a sync pulse from a video format signal, and triggers on a specific line or field.

Trigger Parameters and Settings

The following trigger parameters apply to all the trigger types unless stated otherwise.

Mode	Auto	The GDS-200/300 generates an internal trigger if there is no trigger event, to make sure waveforms are constantly updated regardless of trigger events. Select this mode especially when viewing rolling waveforms at slower timebases.
	Normal	The GDS-200/300 only acquires a waveform when triggered.
	(Single)	Pressing the Single will acquire a single waveform. (This mode is not selectable from the Trigger menu. See page 82 for details)
Force Trigger		This setting will force a trigger to be generated when pressed. This setting is useful if triggering a waveform is difficult.
ALT		Alternates the source between channel 1 and channel 2.
Trigger level	Level	Used to manually adjust the trigger level for the current source.
	TTL (1.4V)	Sets the trigger level to 1.4V, suitable for triggering on TTL signals.
	ECL (-1.3V)	Sets the trigger to -1.3V. This is suitable for ECL circuits.
	50%	Sets the trigger level to 50% of the waveform amplitude.
Source	CH1, CH2	Channel 1 or channel 2 input.
Coupling (Edge, Pulse only)	DC	Sets the coupling to DC.
	AC	Sets the coupling to AC.
Slope (Edge only)	Rising	Trigger on rising edge.
	Falling	Trigger on falling edge.
	Either	Trigger on either rising or falling edge.
Reject	Off	Frequency rejection turned off.
	LFR	Low frequency rejection.
	HFR	High frequency rejection.
	NR	Noise rejection
Holdoff	Holdoff	Sets the holdoff time. The holdoff time delays triggering the next waveform for a set amount of time after triggering.
Polarity (Pulse)	Positive polarity	Positive polarity (triggered on the high to low transition)
	Negative polarity	Negative polarity (triggered on the low to high transition)
Polarity (Video)	Positive polarity	Positive polarity.
	Negative polarity	Negative polarity.
Trigger When (Pulse)	=	Equal to.
	>	Longer than.
	<	Shorter than.
	≠	Not equal to.
	When	Pulse width (10ns - 10s)
Standard	NTSC	National Television System Committee
	PAL	Phase Alternate by Line
	SECAM	SEquential Couleur A Memoire
Trigger On	Field1	Sets the trigger point to a line on field1 (odd).
	Field2	Sets the trigger point to a line on field2 (even).
	All Fields	Trigger on all fields.
	All Lines	Trigger on all lines.

Trigger Mode

Background

The trigger mode can be set to Normal or Auto (untriggered roll). The triggering mode applies to all the trigger types. See page 69.

From the Trigger menu, set the Mode to Auto or Normal.

Forced Trigger

Background

If the input waveforms are not triggered, they can be force triggered using the Force Trigger button.

From the Trigger menu, press the Force Trigger button. The scope will trigger immediately.

Alternate Trigger

Background

The Alternate trigger allows the scope to trigger alternatively between CH1 and CH2.

From the Trigger menu, press the ALT button. A check will indicate if the ALT function is active. The ALT function applies to all the trigger types.

Trigger Level

Background	The trigger level can be set using touch gestures or from the trigger level.
Touch Control	1. Select the trigger source from the side of the graticule.2. Swipe up and down from the right side of the graticule to set the trigger level for the selected trigger source.
Menu Control	1. From the Trigger menu use the Trigger Level slider to set the trigger level.2. To set the trigger level to 50%, drag from the Trigger Level button and drop to the “Set to 50%” option.3. To manually set the trigger level, drag from the Trigger Level button and drop to the keyboard icon. Type in the value for the trigger level with the keypad that appears.

Drag and drop the Trigger Level button to manually set the trigger level

Trigger Level button

Edge Trigger

Background

The Edge trigger allows you to acquire a waveform on a rising or falling edge.

Setup

1. Press the Edge button.

2. Press the Options icon to bring up the Trigger options for the Edge trigger.

1. Select the appropriate parameters. See page 69 for a description of each parameter.

Source CH1, CH2

Coupling DC, AC

Slope Rising, falling, either

Reject Off, low frequency rejection, high frequency rejection, noise rejection

Level 0.00V, TTL(1.4V), ECL(-1.3V), 50%

Holdoff 10ns - 10s

Example

Pulse Trigger

Background

The Pulse trigger allows you to acquire a waveform on a rising or falling pulse of a defined width.

Setup

1. Press the Pulse button.

Page 67

1. Press the Options icon to bring up the Trigger options for the Pulse trigger.

1. Select the appropriate parameters. See page 69 for a description of each parameter.

Source CH1, CH2

Coupling DC, AC

Polarity Positive, negative

Reject Off, low frequency rejection, high frequency rejection, noise rejection

Level 0.00V, TTL(1.4V), ECL(-1.3V), 50%

Trigger Equal, greater than, less than, not When equal to. (Time: 10ns - 10s)

Holdoff 10ns - 10s

Example

Video Trigger

Background

The Video trigger allows you to acquire PAL, NTSC and SECAM video signals. The GDS-200/300 can trigger on any line or field.

Setup

1. Press the Video button.

Page 67

1. Press the Options icon to bring up the Trigger options for the Video trigger.

1. Select the appropriate parameters. See page 69 for a description of each parameter.

Source CH1, CH2

Standard NTSC, PAL, SECAM

Polarity Positive, negative

Trigger On Field 1 (line 1-263), Field 2 (line 1-262), All Field, All Lines

Level 0.00V, TTL(1.4V), ECL(-1.3V), 50%

Holdoff 10ns - 10s

Example

Autoset

Background

The Autoset function will automatically choose the best timebase and vertical scale for the activated waveforms. The Fit Screen and AC Priority settings position the input signal to the best viewing condition.

Note

Note the Autoset function is only applicable when the input is equal or greater than 30mV & 20Hz.

Autoset Settings

Descriptions

Fit Screen

Fit Screen mode will fit the waveform to the best scale, including any DC components (offset).

	AC Priority	AC Priority mode will scale the waveform to the screen by removing any DC component.
Steps	1. From the main display press the Autoset key.	Autoset
	2. The waveform will appear on the display.
	3. For a few seconds you will have the option to press [Lindn?] to undo the autoset configuration.
Autoset Mode	1. Long press Autoset to bring up the Autoset Mode menu.
	2. Press the appropriate check-box to select Fit Screen or AC Priority.
	The Autoset Mode menu can also be accessed via the Utility menu, see page 103 for details.

Run Mode

The scope has three main running modes, Run, Stop and Single.

Run mode continuously captures (triggered) waveforms in a FIFO buffer. Each waveform that is captured can be replayed when the scope is in the Stop mode. The number of waveforms that are captured depends on the sample rate and the memory length.

Stop mode stops capturing waveforms and allows you to view any waveform that was previously captured in the Run mode.

Single mode captures a single waveform as soon as the trigger conditions are met.

Run/Stop and Single Key Overview

The Run/Stop key shows the Run/Stop status, the record progress of the captured waveforms and the navigation keys for navigating captured waveforms when in the Stop mode.

Item	Description
Record Indicator	The Record indicator blinks when the scope is triggering.
Progress Bar	The Progress bar indicates the record progress.
Step Forward	Steps to the next captured waveform when the scope is in Stop mode.
Step Backward	Steps to the previous captured waveform when the scope is in Stop mode.
Run/Stop Key	Toggles the scope between Run and Stop mode.
Single Key	Turns on the Single Trigger mode.

Run/Stop Mode

Background	By default the scope is in Run mode as soon as it is turned on.The Run/Stop key is shown in green when the scope is in Run mode and red when it is in Stop mode.
Toggle Modes	Press the Run/Stop key to toggle between Run and Stop modes.
Record Navigation	1. Put the scope into Run mode (described above).2. After the desired number of samples has been recorded, toggle the scope to Stop mode by pressing the Run/Stop key.3. Use the Backward and Forward keys to navigate to the desired waveform sample.4. When the Backward or Forward keys are used a slider will appear allowing you to quickly navigate to the desired sample. The slider will disappear after a short while of inactivity.5. The slider can be pinned/unpinned from the menu bar by toggling the pin icon.

Example

Trigger status

Single Mode

Single Mode

Single

Simply press the Single Single key to set the scope to single trigger mode.

The scope will capture a waveform when the trigger conditions are met. This is useful for intermittent signals.

Cursor Measurements

Horizontal or vertical cursors are used to show the position and values of waveform measurements and math operation results. These results cover voltage, time, frequency and other math operations. When the cursors (horizontal or combined) are activated, they will be shown on the main display unless turned off.

Using Cursors

Background

The Gesture Control icon is used to toggle the touch screen controls between Waveform controls and Cursor controls. The Cursor Display must be activated to use and see the cursor measurements.

Steps

1. Press the Gesture Control icon, located in the top corner of the graticule.

Gesture Control

1. Set the Gesture Control to Horizontal or Combined Cursor control.

2. Turn Cursor Display on.

1. Cursors will now appear on the display for the currently selected channel, 2 lined cursors for the Horizontal Cursor option and 4 lined cursors for the Combined Cursor option.
2. The cursor measurements will appear in a window in the top left-hand side.

Horizontal:

Cursor 1, 2 Time/frequency, voltage/current at crossing.

Delta (difference between cursors) dV/dt or dI/dt.

Combined:

□，○

Time/Frequency: Cursor 1, cursor 2

Cursor 1, 2 Voltage/Current : Cursor 1, cursor 2

Δ Delta (difference between cursors) dV/dt or dI/dt.

1. Pressing the cursor window will toggle the horizontal reading between frequency and time.

Moving the Cursors

1. To move the cursors horizontally, touch and swipe a cursor line horizontally to the desired position.

2. To move the cursors vertically, touch and swipe a cursor line vertically to the desired position.

1. Return the Gesture Control back to Waveform after the cursors have been positioned. See step 2 above.

Automatic Measurements

Up to 4 automatic measurements can be calculated from the trigger configuration conditions each time a waveform is captured.

The automatic measurements can be based on the entire record length, the area of the waveform displayed on-screen or from a gated region bound by the onscreen cursors.

Measurement Types

Amplitude Measurements

	Pk-Pk	Difference between positive and negative peak. (=max - min)
	Max	Positive peak.
	Min	Negative peak.
	Amplitude	Difference between the global high value and the global low value, measured over the entire waveform or gated region. (=high - low)
	High	Global high voltage.
	Low	Global low voltage.
	Mean	The arithmetic mean value is calculated for all data samples as specified by the Gating option.
	Cycle Mean	The arithmetic mean value is calculated for all data samples within the first cycle found in the gated region.
	RMS	The root mean square of all data samples specified by the Gating option.
	Cycle RMS	The root mean square value is calculated for all data samples within the first cycle found in the gated region.
	Area	Measures the positive area of the waveform and subtracts it from the negative area. The ground level determines the division between positive and negative areas.
	Cycle Area	The Summation based on all data samples within the first cycle found in the gated region.
	ROVShoot	Rise overshoot.
	FOVShoot	Fall overshoot.
	RPREShoot	Rise preshoot.
	FPREShoot	Fall preshoot.
Time Measurements
	Frequency	Frequency of the waveform.
	Period	Waveform cycle time. (=1/Freq)
	Rise Time	The time required for the leading edge of the first pulse to rise from the low reference value to the high reference value.
	Fall Time	The time required for the falling edge of the first pulse to fall from the high reference value to the low reference value.
	+Width	Positive pulse width.

	-Width	Negative pulse width.
	Duty Cycle	Ratio of signal pulse compared with whole cycle. =100x (Pulse Width/Cycle)
	+Pulses	Measures the number of positive pulses.
	-Pulses	Measures the number of negative pulses.
	+Edges	Measures the number of positive edges.
	-Edges	Measures the number of negative edges.
Delay Measurement
	FRR	Time between:Source 1 first rising edge and Source 2 first rising edge.
	FRF	Time between:Source 1 first rising edge and Source 2 first falling edge.
	FFR	Time between:Source 1 first falling edge and Source 2 first rising edge.
	FFF	Time between:Source 1 first falling edge and Source 2 first falling edge.
	LRR	Time between:Source 1 first rising edge and Source 2 last rising edge.
	LRF	Time between:Source 1 first rising edge and Source 2 last falling edge.

Delay Measurement

	FRR	Time between:Source 1 first rising edge and Source 2 first rising edge.
	FRF	Time between:Source 1 first rising edge and Source 2 first falling edge.
	FFR	Time between:Source 1 first falling edge and Source 2 first rising edge.
	FFF	Time between:Source 1 first falling edge and Source 2 first falling edge.
	LRR	Time between:Source 1 first rising edge and Source 2 last rising edge.
	LRF	Time between:Source 1 first rising edge and Source 2 last falling edge.
	LFR	Time between:Source 1 first falling edge and Source 2 last rising edge.
	LFF	Time between:Source 1 first falling edge and Source 2 last falling edge.
	Phase	The phase difference of two signals, calculated in degrees. 1t2 °C

Viewing Automatic Measurements

Background	There are two different display options for automatic measurements. A minimized and a maximized view*.
	The minimized view will display the real-time measurement results.
	The maximized view will display the real-time, mean, minimum and maximum measurement results.
	*The minimized view is only applicable in the landscape viewing mode. The vertical viewing mode displays automatic measurements in the maximized view by default and will always be displayed on screen.

Steps

1. Press the M (Measure) icon in the menu bar at the bottom of the display.
2. The minimized view will appear above the menu bar.
3. To toggle between the minimized and maximized view, tap anywhere within the area that the automatic measurements are displayed.
4. To remove the automatic measurements from the display*, press the M (Measure) icon again in the menu bar.

Measure icon

Selecting an Automatic Measurement

Background

Automatic measurements can be accessed from the drop down menu or from the menu bar at the bottom of the screen.

Steps

1. Make sure the automatic measurements are visible at the bottom of the display.

2. From the Menu Bar: Long-press anywhere within the area that the automatic measurements are displayed to bring up the Measurement menu.

OR

From the Drop Down Menu: Press the top of the screen to access the drop down menu. From the Menu tray, select the Measure icon.

Long press

1. Select a measurement slot (from 1 of 4 quadrants).

2. Select a measurement category (Amplitude, Time, Delay).

3. Select an automatic measurement from the selected category.

Tip: Tapping the bottom of the selection window will display the next group of automatic measurements for the category.

1. To select the source for the selected automatic measurement, long-press the measurement selection. Select the source from the submenu that appears.

Automatic Measurement Options

Background

The Option menu will limit the bounds of the automatic measurements to the entire record length, to the screen graticule or to the onscreen cursors. For measurement statistics, the mean number of samples can also be set. The default number of samples is set to 2.

Steps

1. Access the Measurement menu.

2. Press the Options icon to bring up the options menu.

3. From the Options menu select the measurement gating:

Gating Off (Full Record), Screen, Between Cursors

1. For Statistics, select the number of mean samples. The number of samples is used to calculate the Mean measurement for when the automatic measurements are displayed in the maximized mode.

Drop-Down Menu

The Drop-down menu is split into the Menu tray and the App tray. The Menu tray contains all the configuration settings and other miscellaneous functions not directly related to the operation. The App tray contains a number of EE apps that can be used as supplementary tools for the GDS-200/300.

Opening the Drop-down Menu

Background

From the main screen, press the title bar to bring up the Drop-down menu.

The Drop-down menu will be displayed. To return to the main display, press anyway outside of the drop down menu system.

Press anywhere outside to exit

Return to Default Settings

Background

The default icon will allow you to return the scope to the factory default settings. See page 180 for a list of the factory default settings.

OPERATION

Steps

Press the Default icon from the Menu tray.

- The default settings will be restored immediately.

Panel Lock

Background

The panel lock can be used to prevent any settings from being inadvertently changed.

Activate Panel Lock

Press the Lock icon from the Menu tray.

- The panel lock will appear at the bottom of the screen.

Disable Panel Lock

Press and hold the Padlock icon.

- Wait for the progress bar to finish before letting go

- "Panel locked" will be displayed when the screen is touched anywhere other than the Padlock button.

Example

Press and hold the Padlock icon until the green progress bar is full.

Utility Menu

The Utility Menu configures a number of general system settings such as the System language, Hardcopy settings, USB device port settings, Calibration and other settings.

Accessing the Utility Menu

From the main screen, press the title bar to bring up the Drop Down menu. Press the Utility icon to show the Utility menu.

Set the Language

Background	The Language menu selects the system language.
Steps	From the Utility menu, press Language and select your preferred language.
	Note:	The languages available may vary from that shown.

View System Information

Background

The system information displays the model name, serial number, firmware version, FPGA revision and GW Instek website address.

- A QR code for the serial number is also shown.

Steps

From the Utility menu, press System>System Information.

Signal Path Compensation

Background	Signal Path Compensation (SPC) is used to compensate the internal signal path due to ambient temperature and long term drift. SPC is able to optimize the accuracy of the oscilloscope with respect to the ambient temperature and signal drift.
	Ensure the scope has been warmed up for at least 10 minutes before performing signal path compensation.

Steps

1. From the Utility menu, press System>SPC.
2. Disconnect all probes/cables from CH1 & CH2 when prompted and then press OK.

- The calibration items will show sequentially at the bottom of the display.

- "Calibration Successful!", will be shown after each channel has been calibrated. It takes \~1 minute per channel.

Setting the System Date & Time

Background

The GDS-200/300 will keep the date and time settings saved so long as the battery is not allowed to fully discharged.

1. Press Utility>System>Date&Time.

The Date&Time menu will appear.

1. To set the date, press Date and use the number picker to set the year, month and day.
2. To set the time, press Time and use the number picker to set the hour and minute.
3. Press OK to save the date and time settings.

Note

The date and time settings only remain saved if the battery is not fully drained. However, if the unit shuts down due to insufficient battery power, there will usually still be enough battery power to keep the internal clock running for sometime.

Touch Sounds

Background	When turned on, the Touch Sounds function will produce a buzzer sound when a button is pressed on the touch screen. By default the buzzer sound is turned off.
	Press Utility>System>Touch Sounds and toggle Touch Sounds on/off.

Erase Memory

Background	The Erase Memory function will delete all waveform and setup files from the internal memory.
	Press Utility>System>Erase Memory and press OK to erase the memory.

Configure the Hardcopy Function

Background

The Hardcopy function is a quick save function. Each time the Hardcopy Save key is pressed, according to the Hardcopy setting, an image, waveform or setup file is saved.

Steps

1. From the Utility menu, press Hardcopy and select the save function for the Hardcopy function.

2. The Hardcopy Save key now be used to save the item configured with the Hardcopy function.

3. See the Save Operations and Recall Operations chapters for the file format details, see page 124&135.

Hardcopy Image, Waveform, Setup, All

Configure USB Device Port

Background	The setting, “USB device port” in the Utility menu determines whether the internal storage is seen as an internal or external drive. When set to Disk Drive, the internal storage can be accessed via a USB connection to a PC or via a USB OTG cable on a smart phone. When the USB device port is set to Communication, the unit can be used for remote control.
	When connected to a PC via the Mini-B USB port, the USB device port must be set to Communication in order to save files. See page 124.
Steps	From the Utility menu, press USB device port and select the USB interface type. USB device port Communication, Disk Drive
	A Note about USB OTG:• USB OTG functionality is only supported on some smartphones/tablets running the android operating system.• If your smartphone/tablet supports USB OTG, a file manager that supports USB OTG as well as a USB OTG cable are also needed.• To use USB OTG, connect the GTL-253 Type A - Mini-B USB cable to the USB OTG cable. Connect the OTG cable to the smart phone. The GDS-200/300 should now be visible on the smartphone's file manager.

Configure Autoset Mode

Background	There are two operating modes for the Autoset function: Fit Screen Mode and AC Priority Mode. Fit Screen Mode will fit the waveform to the best scale, including any DC components (offset). AC Priority mode will scale the waveform to the screen by removing any DC component.
Steps	From the Utility menu, press Autoset Mode and select the mode.Autoset Mode Fit Screen Priority, AC Priority

Example 2VPP signal with 2V DC offset

Fit Screen

AC Priority

Set Ruler

Background	The Ruler function adds a scale to the graticule. Note this mode only functions in the vertical view. See page 34 to set the display to the vertical mode.
Steps	From the Utility menu, press Ruler to toggle the Ruler function on/off.
	Ruler	On, Off
Example

Calibration

Background

The Calibration menu allows you to perform vertical calibration on the oscilloscope channels.

Steps

1. From the Utility menu, press Calibration>Vertical Calibration to start vertical calibration.

2. A prompt will appear asking you to connect the CAL output to CH1.

3. Connect the Vertical Calibration cable, GCL-001, to the input in the restricted panel* on the interface panel and to CH1.

*You may need to use a Philips head screwdriver to remove the panel.

1. Press OK to start the CH1 calibration.

2. Repeat the above steps for CH2.

3. Reset the scope when the calibration has finished.

Vertical Calibration menu

Acquire Menu

The Acquire Menu sets the acquisition mode, channel mapping (XY mode), record length and the sample interpolation type.

Accessing the Acquisition Menu

From the main screen, press the title bar to bring up the Drop Down menu. Press the Acquire icon to show the Acquire menu

Select Acquisition Mode

Background	The acquisition process samples the analog input signals and converts them into digital formats for internal processing. The acquisition mode determines how the samples are used to reconstruct a waveform.
Modes	Sample	This is the default acquisition mode. Every sample from each acquisition is used.
	Peak Detect	Only the minimum and maximum value pairs for each acquisition interval (bucket) are used. This mode is useful for catching abnormal glitches in the signal.
	Average	Multiple acquired data is averaged. This mode is useful for drawing a noise-free waveform.Average Setting: 2, 4, 8, 16, 32, 64, 128, 256
Steps	From the Acquire menu, press Mode and select an option. When a mode has been selected, press OK.
	Mode:	Sample, Peak Detect, Average
Example	Sample	Peak Detect Average (256)

Show Waveform in XY Mode

Background

The XY mode maps the input of channel 1 to the input of channel 2. This mode is useful for observing the phase relationship between waveforms.

XY mode can also be used with cursors, see page 83 to turn cursors on.

Connection

1. Connect channel 1 to the X-axis source.

2. Connect channel 2 to the Y-axis source.

3. Activate both channel 1 and channel 2.

CH2, Y-axis

CH1, X-axis

Steps

1. From the Acquire menu toggle XY mode on.

2. The X-Y mode will appear.

Example

X-Y cursor
measurements

Set the Record Length

Background	The number of samples that can be stored is set by the record length. Record length is important in an oscilloscope as it allows longer waveforms to be recorded and/or allows higher sampling rates to be achieved when equivalent time sampling is used.
Record Length	1k 30,000 waveforms max10k 3,000 waveforms max100k 300 waveforms max1M 20 waveforms max5M 4 waveforms max
Steps	From the Acquire menu, press Record Length and select the record length.Record Length 1k, 10k, 100k, 1M, 5M

Example

Record Length menu

Set the Interpolation

Background	The GDS-200/GDS-300 has two types of interpolation modes: ET (Equivalent Time) and Sin(x)/x interpolation. Equivalent time sampling is able to achieve a sample rate of 20GSa/s when sampling periodic waveforms. Sin(x)/x interpolation uses a sinc interpolation formula to reconstruct a continuous signal between sampled points.
	Sin(x)/x	Samples of data are used to reconstruct a single waveform. Sin(x)/x sampling should be used when the time base is fast or if single shot events need to be captured.
	Equivalent-time sampling	Sampled data is accumulated a number of times to reconstruct a single waveform. This increases the sampling rate, but can only be used for repetitive signals. This mode is usually used when the time base is too fast for real-time sampling.
Steps	From the Acquire menu, press Interpolation and select the interpolation method.Interpolation ET, sin(x)/x

Display Menu

The Display Menu defines how the waveforms and parameters appear on the display.

Accessing the Display Menu

From the main screen, press the title bar to bring up the Drop Down menu. Press the Display icon to show the Display menu

Display the Waveform as Dots or Vectors

Background

When the waveform is displayed on screen, it can be displayed as dots or vectors.

Modes

Pure waveform diagram showing two identical sinusoidal peaks against a black background (no text or symbols)

Dots: Only sampled dots are displayed.

Waveform signal with two identical peaks and troughs on a black background (no text or symbols)

Vectors: Both the sampled dots and the connecting line are displayed.

Steps

From the Display menu press Type and select the display mode.

Type

Vectors, Dots

Type Menu

Set the Level of Persistence

Background	The Persistence function allows the GDS-200/GDS-300 to mimic the trace of a traditional analog oscilloscope. A waveform trace can be configured to “persist” for a designated amount of time.
Steps	From the Display menu press Persistence and set the level of persistence with the slider or the preset keys.Persistence Off, Short, Medium, Long, Infinite

Persistence Menu

Set the Waveform Intensity

Background	The intensity level of a signal can also be set to mimic the intensity of an analog oscilloscope by setting the digital intensity level.
Steps	From the Display menu press Waveform Intensity and select the intensity level.Waveform Intensity 0 - 100%

Waveform Intensity Menu

Set the Graticule Intensity

Background	The graticule intensity level can also be configured.
Steps	From the Display menu press Graticule Intensity and select the intensity level.Graticule Intensity 0 - 100%

Graticule Intensity Menu

Set the Graticule Type

Background	There are 4 types of selectable graticule.
Steps	From the Display menu press Graticule and select the graticule type.
		Full: Shows the full grid; X and Y axis for each division.
		Grid: Show the full grid without the X and Y axis.
		Cross Hair: Shows only the center X and Y frame.
		Frame: Shows only the outer frame.

Graticule Menu

Set the Brightness Level

Background	The Brightness menu sets the display brightness and the display power management, known as ECO mode. ECO mode turns the brightness down after a set amount of time until the display is touched again.
Steps	From the Display menu press Brightness and select the brightness level and set the ECO mode time.
	Brightness	0 - 100%
	ECO Mode	1, 2, 5, 10, 30 minutes

Brightness Menu

Go-NoGo Menu

A Go-NoGo test checks if a waveform fits inside a user-specified maximum and minimum boundary. Boundary templates can be automatically created from a source channel or created manually using the touch screen. Boundary tolerances and violation conditions can also be set.

Accessing the Go-NoGo Menu

From the main screen, press the title bar to bring up the Drop Down menu. Press the Go-NoGo icon to show the Go-NoGo menu

Configuring the Go-NoGo Menu

Source

1. Press the Source option to set the source waveform.

Source CH1, CH2

Condition

1. Press NoGo When to set the NoGo conditions.

	Enter	Sets the NoGo condition to when the input signal stays within the limit boundary.
	Exit	Sets the NoGo condition to when the input signal exceeds the limit boundary.
Violating	3. Press Violating to set the NoGo Action. This setting determines the action of the scope when the NoGo When setting is true.
	Stop	The waveform stops when the conditions are violated.
	Stop Beep	The waveform stops and a beep will be output when the conditions are violated.
	Continue	Ignore violations and continue to monitor the signal.
	Continue Beep	Output a beep when a violation occurs, but continue to monitor the signal.
Turn Go-NoGo On	4. Press Go-NoGo and turn Go-NoGo on.An upper and lower template will appear on the display as Ref1 and Ref2, respectively.The Template Edit option will now be available in the Go-NoGo menu.
Template Edit	5. The Template Edit option configures the upper and lower template based on the source channel selected above.6. Select either the Max/Min or the Auto option
Max/Min	Individually sets the offset for the upper and lower templates. These are based on the ground level of the source channel.
Auto	Sets the tolerance for the upper and lower template an equal distance from the source channel. This is set to 0.4% by default.

Save Template

1. To save or recall a template, press the Option button when in the Template Edit menu.

For the Max/Min option, there are a number of recall options:

From Allows you to recall either an internally saved reference waveform (Wave 1 - Wave 2), or to recall a reference waveform using the file manager.

To Recall the waveform to R1 (upper template) or R2 (lower template).

Recall Recalls the selected reference waveform to the corresponding template.

Save options:

Save Max to R1 Saves the Max template to reference 1.

Save Min to R2 Saves the Min template to reference 2.

For the Auto option, there is a single save option, there is not a recall option:

Save Template

Saves both the upper and lower template to R1 and R2 respectively.

Max/Min Example

Auto Template

Running a Go-NoGo Test

Background

The Go-NoGo controls are located at the bottom left-hand corner of the screen. The Fail/Total ratio (Violations/Number of Tests) is shown in the title bar.

Go-NoGo controls

Run Go-NoGo Test

1. Toggle the Go-NoGo button from pause to play.

The test will run continuously until the test is stopped.

Pressing the Go-NoGo button again will stop the test and toggle the button back to pause.

If the Violating setting was set to Stop or Stop Beep, press the Go-NoGo button again to restart the test after it has stopped.

Results	2. When Go-NoGo is running, the Fail/Total ratio is displayed in the title bar. The first digit represents the number of failed tests, and the second digit represents the number of tests.When the test has stopped the scope goes into the Stop mode (page 81) allowing you to step though each acquisition with the Go-NoGo template overlay.
Reset Go-NoGo	3. To reset the Go-NoGo test, press the Reset button
Exit Go-NoGo Testing	4. To exit from Go-NoGo testing press the Exit button

Save Operations

The Save function configures the save file destination, file format and in the case of image files, the on-screen items that should be saved.

When connected to a PC, files can only be saved if the USB mode is configured to "Communication". See page 102 for details.

Accessing the Save Menu

From the main screen, press the title bar to bring up the Drop Down menu. Press the Save icon to show the Save menu.

Saving and Configuring Image Files

Background	Image files can be saved to the internal memory in a number of file formats. Custom notes can also be saved with the image file. The brief mode allows Custom notes can also be attached to image files or on-screen items such as automatic measurements and trigger positions can be saved as extra data in the image file using the Brief Mode.
Image File Items	Destination	Selects the save file destination.
	File Format	Selects the image file format.
	Brief Mode	Embeds data into the image file.
	Note	Saves a note with the same filename as the image file is corresponds to.
Save Image	1. From the Save menu, press the Image tab.2. To save, press the Save button at the bottom of the image tab.The file will be saved into the configured file path. See below for the configuration details.Save button
Destination	3. Press Destination to set the save file destination.There are two options:
	File Manager	Goes to the file manager to set the save-file path or to create new folders. See page 139 for details on using the file manager.
	Rename	By default, files are saved in the format DSXXXX.PNG, where XXXX is a number starting at 0001 that is incremented each time an image file is saved. This default save-filename can be changed using the Rename option.This option will allow you to rename the default file name using the on-screen keyboard.
File Format	4. Press File Format to select the save file format:
	BMP	Sets the image format to bitmap.
	PNG	Sets the image format to PNG (default format)
Adding Notes (Text file)	5. To add Notes, Brief Mode must be turned off. When the Brief Mode is turned off, the Note option will be available.
	6. Press Note. The on-screen keyboard will appear. Enter your note and press OK when finished*. See page 48 for details on using the on-screen keyboard.When the image file is saved, the note will be saved as text file (*.txt) into the same file path and with the same base filename as the image file.*Multilanguage notes are possible if the system language is not English.

Brief Mode

Brief mode adds a series of user-selectable data to the bottom of an image file. It also reverts the normally black background into a white background for easy printing.

1. Toggle Brief Mode on.

2. Press Brief Mode Setting to set what data gets saved to the image file:

Date&Time Saves the date and time. Vertical Saves the vertical scale, coupling, DC mode and bandwidth limit of all the active channels.

Horizontal Saves the horizontal position and scale.

Trigger Saves the trigger channel, coupling, slope, frequency rejection, Noise rejection, trigger level and other data associated with the selected trigger type.

Cursor Saves the cursor position to the image file.

Cursor Measure Saves the cursor information overlay to the image file.

Measure Saves automatic measurements and DMM measurement readings.

Note Adds a user-created note at the bottom of the image file. Note: Multilanguage notes are possible if the system language is not English.

1. To preview the image file before saving, press the Preview button.

Example Image File with Brief Mode = On

Saving and Configuring Waveform Files

Background	Each displayed waveform can be saved either separately or together in a folder for later recall. Waveforms can be saved from any of the source channels, reference channels or math waveform.
Waveform File Items	From	Selects the waveform source
	Destination	Selects the destination to save the waveform.

Save Waveform

1. From the Save menu, press the Waveform tab.

2. To save, press the Save button at the bottom of the Waveform tab.

The file will be saved into the configured file path with the configured file format. See below for the configuration details.

Save button

From

1. Use the From option to select the source waveform:

1 Channel 1

2 Channel 2

M Math source

R1 Reference waveform 1

R2 Reference waveform 2

All Displayed Saves all the displayed waveforms into a directory, ALXXXX, where XXXX is a number that is incremented each time a save is performed.

Destination

1. If only a single source waveform is to be saved, the following destination options are available:

Wave1 Wave1 - Wave20

Ref R1 - R2

File Pressing File will allow you to either set the file path or rename the file from the default of DSXXXX.LSF, where XXXXX is a number that is incremented each time the waveform is saved.

	5. If All Displayed waveforms are to be saved, then the following destination options are available:
	File Manager	Pressing File will allow you to change the file path from the root directory of the internal disk.
	Rename	Pressing Rename will allow you to rename the default directory from ALXXXX.
File Format	6. Press File Format to select the save file format:
	LSF	Internal file format. This format saves and recalls waveforms the fastest.
	Fast CSV	Comma separated values. Allows the waveforms to be saved in a format that is readable by spreadsheets.
Note	Fast CSV files can only be recalled if the record length is 1k or 10k.
Adding Notes	A text file note can be added to the same file path as the saved waveform file.
	7. Press Note. The on-screen keyboard will appear. Enter your note and press OK when finished. See page 48 for details on using the on-screen keyboard.
	When the waveform file is saved, the note will be saved as a text file (*.txt) into the same file path and with the same base filename as the image file.

For example if the waveform is saved as DS001.lsf then the note will be saved as DS001_LSF.txt.

Saving and Configuring Setups

Background	Setup files can be saved so that the instrument state can be recalled at a later time.
Setup File Items	Destination	Selects the save file destination.
Save Setup	1. From the Save menu, press the Setup tab.2. To save, press the Save button at the bottom of the Setup tab.The file will be saved into the configured destination. See below for the configuration details.
		SetuptabSavebutton

Destination

1. Press Destination to set the destination:

Set

Set 1 - Set 20

Press Edit label to set a label for the selected setup slot.

File

Pressing File will allow you to either set the file path or rename the file from the default of DSXXXX.SET, where XXXX is a number that is incremented each time the waveform is saved.

Saving and Configuring Images, Waveforms and Setups All at Once

Background	Images, Waveforms and Setup files can all be saved at the same time into a directory at the same time using the All option.
All File Contents	All the files are saved, by default, to a directory named AXXXX, where XXXX is a number that is incremented each time a save operation is performed.
	AXXXX.PNG	Image file
	AXXCH1/2.LSF	Waveform save file
	DSXXXX.SET	Setup up file

Save All

1. From the Save menu, press the All tab.

2. To save, press the Save button at the bottom of the All tab.

An image file, setup file and waveform files will be saved into the configured destination. See below for the configuration details.

All tab

Save button

Destination

1. Press Destination to set the destination:

File Manager Goes to the file manager to set the save-file path or to create new folders. See page 139 for details on using the file manager.

Rename By default, files are saved into a directory called AXXXX, where XXXX is a number starting at 0001 that is incremented each time a save operation is performed. This option will allow you to rename the default directory name using the on-screen keyboard.

Recall Operations

The Recall function configures the save file destination, file format and in the case of image files, the on-screen items that should be saved.

Files can only be recalled if the USB port is configured to "Communication". See page 102 for details.

Accessing the Recall Menu

From the main screen, press the title bar to bring up the Drop Down menu. Press the Recall icon to show the Recall menu.

Recalling Waveform Files

Background

Waveforms can be recalled from either the internal memory slots (wave1 - wave20) or files saved in the LSF or CSV file formats.

Waveform Recall Items	From	Selects the source waveform.
	To	Selects the destination to recall to.
	File Format	Selects the file format to recall.

Recall Waveform

1. From the Recall menu, press the Waveform tab.

2. To recall, press the Recall button at the bottom of the Waveform tab.

The waveform will be recalled from the configured file path/source and recalled to one of the reference waveforms. See below for configuration details.

Recall button

From

1. The From option selects the source waveform:

Wave

Wave 1 - Wave 20

A label can also be set for the recalled waveform.

File

*.LSF and *.CSV files can be recalled from the file manager.

To

1. The To option selects where to recall the waveform:

R1, R2

Reference 1, reference 2

File Format	5. Chooses the file format that is to be recalled.This option will determine whether *.LSF or*.CSV files are shown in the From option.LSF Internal file format.CSV Comma separated values.
!Note	Fast CSV files can only be recalled if the record length is 1k or 10k.
View & Edit Notes	If a note for the selected file has been saved, the Note option will display the contents of the note. Pressing the Note option will allow you to edit the note.6. Press Note. The on-screen keyboard will appear. The note can now be edited.Note that the waveform note can be edited even after if it is recalled.

Recalling Setups

Background	Setup files can be recalled from the internal Set (setup) memories or from the internal disk.
Setup Recall Items	From	Selects the source setup.
Recall Setup	1. From the Recall menu, press the Setup tab.2. To recall, press the Recall button at the bottom of the Setup tab.The setup will be recalled from the configured source. See below for the configuration details.
		Setup tabRecall button

From

1. Press From to set the source:

Set

Set 1 - Set 20

Press Edit label to set a label for the selected setup slot.

File

Pressing File will allow you to select a source file (XXXX.SET) from the internal disk.

File Manager

The file manager is used to navigate the internal file system, create new folders or to delete files.

Accessing the File Manager

From the main screen, press the title bar to bring up the Drop Down menu. Press the File Manager icon to show the File Manager.

Navigating the File System

Background

The following diagram will show the file manager functions.

Home button	Goes back to the root directory.
Back button	Goes back to the previous directory.
Save screen shot	Saves a screen shot of the file manager.
New Folder	Creates a new folder.
MultiDelete	Allows you to delete multiple files at the once.
Exit	Exits the file manager.

Navigation	1. Scroll up and down to view files that are out of view.
	2. Select a folder to enter a directory.
	3. Press the Back button to return to the previous directory.Selecting an image file will allow you to preview the image.Selecting a text(note) file will preview the message.Selecting an *.UPG (upgrade) file will allow you to upgrade the firmware.
Create Folder	4. Press the New Folder button to create a new file.Enter the name of the new folder using the popup keyboard.
Delete or Rename Files	5. Long press the file that you want to delete or rename.Choose to Delete or Rename the file from the popup that appears.
MulitDelete	The MultiDelete button allows you to delete multiple files at once.
	6. Press the MultiDelete button.
	7. Select the files that you want to delete by marking the relevant checkboxes.
	8. After the checkboxes are marked, press Delete, then OK to confirm.
Save Screenshot	Press Save Screen to save a screenshot of the file system.

Exit

Press Exit to exit from the file system.

DMM Mode

The DMM function can be used simultaneously with the DSO function. The DMM function is a basic digital multimeter. By default the DMM measurements are hidden in landscape mode. In the vertical display mode the DMM functions and measurements are displayed on the bottom of the screen automatically.

Accessing the Multimeter

There are two methods to access the DMM. Most of these instructions assume that the scope is in the vertical mode. See page 34 to switch to the vertical mode.

First Method: From the main screen, press the title bar to bring up the Drop Down menu. Press the DMM icon to show the multimeter settings.

Second Method:

Vertical Orientation: Press and hold the DMM area for a short while to directly bring up the multimeter settings.

Horizontal Orientation: Press the Measure button to reveal the DMM area*. Press and hold the DMM area for a few seconds to bring up the multimeter settings.

*The DMM area can be expanded/collapsed by pressing once on the DMM area.

Multimeter Display Overview

The DMM display will show the measurement mode, max, min and current measurement, and a trend plot (vertical view only) of the last 120 measurements. Please note that in the horizontal view, the DMM display is only fully shown in the expanded view, see above for details.

AC/DC Voltage Measurement

Background

The GDS-200/300 can measure up to 600V (CAT II) or 300V (CAT III).

Connection

Steps

1. From the multimeter settings choose ACV, ACmV, DCV or DCmV.

$$ \mathrm{ACV} = \boxed {\vee \sim} $$

$$ \mathrm{ACmV} = \boxed {\mathrm{mV} \sim} $$

$$ \mathrm{DCV} = \boxed {\mathrm{V} -} $$

$$ \mathrm{DCmV} = \boxed {\mathrm{mV}} $$

1. The selected mode will be previewed in the lower corner.

1. Press anywhere outside of the multimeter settings area to return to the main display.

Example

Current Measurement

Back Ground

The GDS-200/300 can measure AC and DC current from two input terminals, depending on the current range. There is a 10A input for I≤10A, and a mA terminal for I≤600mA.

Connection

Steps

1. From the multimeter settings choose ACA, ACmA, DCA or DCmA. Ensure that no more than the 600mA is input into the mA port.

$$ \mathrm{ACA} = \boxed {\mathrm{A} \sim} $$

$$ \mathrm{ACmA} = \mathrm{mA} \sim $$

$$ D C A = \boxed {A =} $$

$$ \mathrm{DCmA} = \boxed {\mathrm{mA}} $$

1. The selected mode will be previewed in the lower corner.

ACA and DCA keys

Preview screen

Note

Ensure that no more than 600mA is input into the mA port. Failure to do so will blow the fuse. See page 176 to replace the fuse.

1. Press anywhere outside of the multimeter settings area to return to the main display.

Example

Resistance Measurement

Back Ground

The GDS-200/300 can measure resistance up to 4 counts.

Connection

Steps

1. From the multimeter settings choose the resistance measurement.

Resistance = Ω

1. The selected mode will be previewed in the lower corner.

1. Press anywhere outside of the multimeter settings area to return to the main display.

Example

Diode Measurement

Back Ground

The diode test checks the forward bias characteristics of a diode by running a constant forward bias current through the DUT and measuring the forward voltage drop.

Connection

Steps

1. From the multimeter settings choose the diode measurement.

Diode =

1. The selected mode will be previewed in the lower corner.

1. Press anywhere outside of the multimeter settings area to return to the main display.

2. OPEN will be displayed when the diode passes the diode test.

Note

Ensure the diode polarity is correct before performing the diode measurement.

Example

DMM mode Hold on/off

Diode measurement

Continuity Measurement

Back Ground

The continuity test checks that the resistance in the DUT is low enough to be considered continuous (of a conductive nature). The continuity threshold level is set to <15 .

Connection

Steps

1. From the multimeter settings choose the continuity measurement.

Continuity =

1. The selected mode will be previewed in the lower corner.

1. Press anywhere outside of the multimeter settings area to return to the main display.

2. The approximate resistance will be displayed when there is continuity present in the connection.

OPEN will be displayed if continuity is not present.

Example

Temperature Measurement

Back Ground	The GDS-300 can measure temperature using a thermocouple. To measure temperature, the DMM accepts a thermocouple input and calculates the temperature from the voltage fluctuation. The thermocouple type is taken into consideration. Temperature measurement is only supported on the GDS-300.
Note	Please see the specifications on page 184 for the thermocouple specifications.
Connection

Steps

1. From the multimeter settings choose the temperature measurement.

- Pressing the Temperature button will toggle between °C and °F.

Temperature = °C / °F

1. Next, select the thermocouple type.

Thermocouple = B E, J, K, N, R, S, T

1. The selected mode will be previewed in the lower corner.

Thermocouple type Preview screen

Temperature key/toggle temperature unit

1. Press anywhere outside of the multimeter settings area to return to the main display.

Example

EE APPs

The GDS-200/300 has a number of handy engineering apps built-in. The following apps are available by default:

Attenuation Calculator, Resistance Calculator, Calculator, Advanced DMM, Template Editor and QR-Code Link.

Accessing the EE Apps

From the main screen, press the title bar to bring up the Drop Down menu. Press the App tray to show the EE Apps menu tray.

Attenuation Calculator

Background

The attenuation calculator calculates the resistor values of 5 common attenuator circuits. The only input required is the attenuation required (dB), the system impedance (Z_0) and the resistor accuracy (Standard E6 - E192).

Example

Steps

1. From the EE Apps tray select the Attenuation Calculator icon.
2. In the ATT field enter the attenuation required in dB.
3. In the Z_0 field input the system impedance in ohms. This value is typically 50 .
4. Select the type of attenuator circuit.

Circuit: Pi Type, T Type, Bridged-T Type, Reflection Type, Balanced Type

1. Press Calculate. This will calculate the exact resistance values required for the desired attenuation and system impedance

2. Press the EXXX button to select the resistor standard.

3. Press Find Resistor to find the resistors that most closely match the ideal resistance values calculated in step 5.

- The best high and best low resistors are shown along with the percentage offset from the ideal value.

Advanced DMM

Background

The Advanced DMM is similar to the regular DMM mode, however it is full screen and includes an advanced trend plot that can log up to 400 measurements. The trend plot is able to log from 40 seconds to 6 hours worth of measurements.

Example

Note

Please see the DMM chapter for details on the different measurement modes and connections. See from page 143.

Select Measurement

1. From the EE Apps tray select the Advanced DMM icon.

2. From the measurement selection wheel select the measurement type.

3. The current measurement, minimum and maximum measurement will be shown as soon as the measurement type is selected.

Logging

1. Data is automatically logged as soon as a measurement function is selected. Logged data is plotted as a green line in the trend plot.

2. Press the Time button and select the logging time. Press OK to confirm the logging duration time.

3. The time is shown as the X-axis of the trend plot.

Time: 40 ~s, 3 ~m, 6 ~m, 15 ~m, 30 ~m, 1 hr, 3 hr, 6 hr

1. To pause the measurement and data logging, press the Hold button.

2. To reset the logging, press the Reset button.

Exit

To exit from the Advanced DMM app, press the Exit button. The advanced DMM will retain its state even after exiting, allowing data logging to continue.

Calculator

Background	The Calculator function is a convenient scientific calculator especially suited to electronic calculations.
Example	Entered equation

Steps

1. From the EE Apps tray select the Calculator app.

2. Using the keypad, enter the desired equation.

3. The equations follow standard order of operations.

4. The equation will appear on the top left-hand side.

5. Press the Equals button to perform the calculation

- The answer will appear in the bottom right-hand side.

QR Code Link App

Background

The QR Code Link app displays QR codes for commonly used websites relating to the GDS-200/300. The GW Instek webpage is included as an example.

To use the QR Code Link app, download a QR code reader app for your smartphone and read the QR codes from the QR Code Link app.

Example

Resistance Calculator

Background

The resistance calculator can calculate the value of a resistor based on the band code. The calculator can also calculate the resistance of SMD resistors based on the 3/4 digit SMD code, EIA-96 (1%) or 2/5/10% code.

See page 177 for information on the various resistor codes.

Standard Resistor 1. From the EE Apps tray select the Resistance Values Calculator icon.

1. Press the Color Code button for standard pin-type resistors.
2. Select the 4 band or 5 band tab.
3. Press each of the colored bands in succession and choose the appropriate color for each band from the pop-up window.

1. Press Calculate to calculate the value of the resistor.

Example: Color Code

SMD Resistor Values

1. SMD resistor values can be calculated in one of 3 ways; using a 3 or 4 digit code, using EIA-96 code or using 2%/5%/10% code.
2. Press the SMD button to select SMD resistors.
3. Select the tab corresponding to code used on the SMD.

SMD 3-digit/4-digit code EIA-96 2%, 5%, 10%

1. Press the SMD code button and enter the SMD code in the pop-up window.
2. Press Calculate to calculate the value of the SMD resistor.

Example: SMD

Template Editor

Background

The Template Editor function can be used for Go-NoGo testing. Templates can be edited from existing templates created from the Go-NoGo function or drawn directly from the touch screen.

See page 118 for details on using the Go-NoGo function.

Example

Template offset from source ground

Edit window

Steps

1. From the EE Apps tray select the Template Editor icon.
2. Select "Draw New Template" or "Load template from...".

Draw New Template

Draw a template freehand

Load Template from...

Uses a previously saved waveform as a template

1. Select a source channel and press Next.

2. If "Draw New Template" was selected, simply trace a template (from left to right) on the screen using the source as guide. The template will be created from a number of points.

3. Press Clear to redo the template drawing.

4. Press Undo to delete the last trace point.
   • After the points have been drawn, touching any point on the screen will return the vertical value.

Press Next when the template is drawn.

1. After the template is first drawn/loaded, the template offset can be edited by swiping the screen up or down from the left of the graticule.
2. To edit the template further, swipe the screen

left and right to position the green edit window and press the Edit button.

• Each point within the edit window can now be edited to a fine scale by drawing on the screen.
- Press OK when done.

1. To smooth the template press the Smooth button.

- Points will be removed to smooth the template.

1. To save the template, press the Save button.

- Choose to save the template to Ref1, Ref2 or as an *.LSF file.

1. After saving, you will be given the option to: edit a new template, go directly to the Go-NoGo function or to exit from the Template editor.

REMOTE CONTROL

CONFIG

This chapter describes basic configuration for remote control. For a command list, refer to the programming manual downloadable from the GWInstek website, www.gwinstek.com

Interface Configuration ....165

Configure USB Interface 165

Remote Control Function Check....166

Using Realterm to Establish a Remote Connection....167

Interface Configuration

The GDS-200/300 uses the USB device port for remote control.

When using the remote control function, the GDS-200/300 acts as a virtual COM port (VCP).

New drivers can be downloaded from the GW Instek website, www.gwinstek.com.

Configure USB Interface

Configuration	PC side connection Type A, host portGDS side connection Type Mini-B, device port
Background	The GDS's USB device port needs to be configured to the “Communication” mode to enable the remote connection.
Configuration	1. Connect the PC to the GDS-200/300 using the supplied USB-A to USB Mini-B cable.2. From the Drop Down menu press the Utility icon>USB device port and select Communication. (See page 102).3. When the PC asks for the USB driver, select the USB driver included on the accompanying User Manual CD or download the driver from the GW Instek website, www.gwinstek.com. The driver automatically sets the GDS-200/300 as a virtual COM port.4. The DSO should now be ready for remote control. See page 166 for the remote control function check.

Remote Control Function Check

Functionality check	Invoke a terminal application such as Realterm.
	In the terminal program, set the COM port, baud rate, stop bit, data bit and parity to match the settings for the virtual COM port of the DSO.
	To check the COM settings of the DSO in Windows, see the Windows Device Manager. For example, in WinXP go to the Control panel → System → Hardware tab.
Note	If you are not familiar with using a terminal application to send/receive remote commands, please page 167 (Using Realterm to Establish a Remote Connection) for more information.
	Run this query command via the terminal after the instrument has been configured for USB remote control (page 165).
	*idn?
	This should return the Manufacturer, Model number, Serial number, and Firmware version in the following format.
	• GW,GDS-310, XXXXXX, VX.XX
Note	For further details, please see the programming manual, available on the GW Instek web site @ www.gwinstek.com.

Using Realterm to Establish a Remote Connection

Background	Realterm is a terminal program that can be used to communicate with a device attached to the serial port of a PC or via an emulated serial port via USB.The following instructions apply to version 2.0.0.70. Even though Realterm is used as an example to establish a remote connection, any terminal program can be used that has similar functionality.
Note	Realterm can be downloaded on Sourceforge.net free of charge.For more information please see http://realterm.sourceforge.net/
Operation	1. Download Realterm and install according to the instructions on the Realterm website.2. Connect the GDS-200/300 via USB to a PC and configure for remote control connection (page 165).3. Make note of the baud rate, stop bits and parity of the VCP driver.Go to the Windows device manager and find the COM port number for the connection. For example, go to the Start menu > Control Panel > Device ManagerDouble click thePortsicon to reveal the connected serial port devices and the COM port for each connected device.

The baud rate, stop bit and parity settings can be viewed by right-clicking the connected device and selecting the Properties option.

1. Start Realterm on the PC as an administrator. Click:

Start menu>All Programs>RealTerm>realterm

Tip: to run as an administrator, you can right click the Realterm icon in the Windows Start menu and select the Run as Administrator option.

1. After Realterm has started, click on the Port tab.

Enter the Baud, Parity, Data bits, Stop bits and Port number configuration for the connection.

The Hardware Flow Control and Software Flow Control options can be left at the default settings.

Press Open to connect to the GDS-200/300.

1. Click on the Send tab.

In the EOL configuration, check on the +CR and +LF check boxes.

Enter the query:

*idn?

Click on Send ASCII.

1. The terminal display will return the following:

GW, GDS-310, XXXXXXXX, VX.XX

(manufacturer, model, serial number, version)

1. If Realterm fails to connect to the unit, please check all the cables and settings and try again.

FAQ

• I connected the signal but it does not appear on the display.
• I want to remove the measurement or FFT results from the display.
• The waveform does not update (frozen).
• The probe waveform is distorted.
• Autoset does not catch the signal well.
• The date and time settings are not correct.
• The accuracy does not match the specification.

I connected the signal but it does not appear on the display.

Make sure you have activated the channel by accessing the vertical menu. You can tell if the channel is activated if its channel indicator is to the left of the graticule. See page 51 to activate a channel.

I want to remove the measurement or FFT results from the display.

In the vertical display mode there is no way to remove the automatic measurements from the display. However in the horizontal display mode the automatic measurements can be removed by pressing the M (Measure) icon in the bottom of the display. See page 89 for further details.

The waveform does not update (frozen).

Press the Run/Stop key to unfreeze the waveform. See page 80 for details.

If this does not help, the trigger mode might be set to Single. Press theRun/Stop key to change out from Single mode.

The probe waveform is distorted.

You might need to compensate the probe. For details, see page 34.

Autoset does not catch the signal well.

The Autoset function cannot catch signals under 30mV or 20Hz. Please manually set the trigger conditions. See page 78 for Autoset details.

The date and time settings are not correct.

For date and time setting details, please see page 33. If it does not help, the battery may be flat. Charge the instrument.

The accuracy does not match the specification.

Make sure the device is powered On for at least 30 minutes, within +20°C-+30°C. This is necessary to stabilize the unit to match the specification.

For more information, contact your local dealer or GWInstek at www.gwinstek.com / [e-mail].

APPENDIX

The Appendix contains basic maintenance, miscellaneous information and the device specifications.

Firmware Update....175

Fuse Replacement 176

Resistor Standards 177

Resistor Standards....177

Standard Resistor Code....177

3 or 4 Digit SMD Resistor Standards....178

EIA-96 Code 178

First Two Digits 178

Multiplier 179

2%, 5%, 10% Code....179

Multiplier 179

Last Two Digits....179

GDS-200/300 Default Settings....180

GDS-200/300 Specifications 181

Scope Specifications 181

Vertical....181

Signal Acquisition....181

Trigger....181

Horizontal 182

X-Y Mode....182

Cursors and Measurement....182

Miscellaneous....182

Battery....182

Probe Compensation....182

Interface....182

Display....183

Power Adapter....183

Dimensions and Weight....183

DMM Specifications....183

Basic 183

DC Voltage 183

DC Current....183

AC Voltage....184

AC Current ^* ....184

Resistance* 184

Diode Test....184

Temperature (Thermocouple)* 184

Continuity Beeper 184

Continuity Beeper 184

GDS-200/300 Dimensions ....185

Declaration of Conformity 186

Firmware Update

Background

The GDS-200/GDS-300 firmware can be upgraded by copying the new firmware to the internal memory and installing it.

New firmware can be downloaded on the GW Instek website.

1. From the Utility menu set the USB device port to Disk Drive. See page 102 for details.
2. The GDS-200/300 will be accessible to the windows file explorer. Copy the firmware file to the root directory of the GDS-200/GDS-300.
3. From the Utility menu set the USB device port back to the Communication setting.
4. From the File Manager, select the firmware file (tap the file name). See page 139 for details.
5. From the popup window select OK to update.

- Do not turn the scope off during the update.

- If using the battery power, ensure that there is adequate power before starting the update.

1. Cycle the power off and on after being prompted.

Fuse Replacement

Background

The GDS-200/300 has fuse protection for both current ports, a 10A and a 1A fuse.

Fuse Type 1A: T1A 500V

10A: T10A 500V

Steps

1. Turn the power switch off on the GDS-200/300.

2. Remove the 4 screws that hold the back panel in place.

Top-down schematic of a device layout with four orange circular annotations pointing to specific components (no text or labels present)

1. Remove the back panel carefully. You will need a case opening tool to pry open the case after the screws are removed.

Note: the fan wiring is connected to the back panel.

1. Replace the fuse that has been blown, as shown below (bottom right-hand side).

Diagram of a computer motherboard showing connectors and socket (no text or symbols)

1A fuse 10A fuse

Resistor Standards

Resistor Standards

Standard	Tolerance	Standard	Tolerance
E6	20%	E48	2%
E12	10%	E96	1%
E24	5%	E192	0.5%

Standard Resistor Code

Standard resistors use colored bands to represent the value of the resistor. To read 4-colored bands, the first two digits represent the base value, the third is a multiplier and the last band is the tolerance. For a 5-colored band, the first 3 digits represent the base value, the 4^th digit is the multiplier and the last digit is the tolerance.

Band color	Base digits	Multiplier	Tolerance
Black	0	10^0	-
Brown	1	10^1	±1%
Red	2	10^2	±2%
Orange	3	10^3	-
Yellow	4	10^4	-
Green	5	10^5	-
Blue	6	10^6	-
Violet	7	10^7	-
Grey	8	10^8	-
White	9	10^9	-
Silver	-	10^-2	±10%
Gold	-	10^-1	±5%

Example: 4 bands, Brown, Black, Black, Brown:

$$ 10 \times 1, 1 \% = 10 \Omega \pm 1 \% $$

3 or 4 Digit SMD Resistor Standards

For 3 or 4 digit SMD codes, the first 2 or 3 digits represent the base value and the last digit represents the multiplier. The letter R is used as a decimal point.

Example1: The code 220 equals 22Ω.

Example2: The code 12R0 equals 12.0Ω.

EIA-96 Code

The EIA-96 standard is a 3 letter code. The first 2 digits codify a base value and the last digit is a letter that codifies a multiplier. EIA-96 code is used for tolerances of 1%.

First Two Digits

Code	Value	Code	Value	Code	Value	Code	Value	Code	Value	Code	Value
01	100	17	147	33	215	49	316	65	464	81	681
02	102	18	150	34	221	50	324	66	475	82	698
03	105	19	154	35	226	51	332	67	487	83	715
04	107	20	158	36	232	52	340	68	499	84	732
05	110	21	162	37	237	53	348	69	511	85	750
06	113	22	165	38	243	54	357	70	523	86	768
07	115	23	169	39	249	55	365	71	536	87	787
08	118	24	174	40	255	56	374	72	549	88	806
09	121	25	178	41	261	57	383	73	562	89	825
10	124	26	182	42	267	58	392	74	576	90	845
11	127	27	187	43	274	59	402	75	590	91	866
12	130	28	191	44	280	60	412	76	604	92	887
13	133	29	196	45	287	61	422	77	619	93	909
14	137	30	200	46	294	62	432	78	634	94	931
15	140	31	205	47	301	63	442	79	649	95	953
16	143	32	210	48	309	64	453	80	665	96	976

Multiplier

Letter Code	Multiplier	Letter Code	Multiplier
F	10^5	B	10^1
E	10^4	A	10^0
D	10^3	X or S	10^-1
C	10^2	Y or R	10^-2

Example: 01A = 100Ω

2%, 5%, 10% Code

A variation to the EIA-96 standard is also used for tolerances of 2%, 5% or 10%. This variation also uses a 3 letter code. The first digit codifies the multiplier and the last two digits codify the base value.

Multiplier

The multiplier is the same as the EIA-96 standard.

Letter Code	Multiplier	Letter Code	Multiplier
F	10^5	B	10^1
E	10^4	A	10^0
D	10^3	X or S	10^-1
C	10^2	Y or R	10^-2

Last Two Digits

2% Tolerance				5% Tolerance				10% Tolerance
Code	Value	Code	Value	Code	Value	Code	Value	Code	Value
01	100	13	330	25	100	37	330	49	100
02	110	14	360	26	110	38	360	50	120
03	120	15	390	27	120	39	390	51	150
04	130	16	430	28	130	40	430	52	180
05	150	17	470	29	150	41	470	53	220
06	160	18	510	30	160	42	510	54	270
07	180	19	560	31	180	43	560	55	330
08	200	20	620	32	200	44	620	56	390
09	220	21	680	33	220	45	680	57	470
10	240	22	750	34	240	46	750	58	560
11	270	23	820	35	270	47	820	59	680
12	300	24	910	36	300	48	910	60	820

Example: A22 = 22Ω

GDS-200/300 Default Settings

The following default settings are the factory configuration settings for the GDS-200/300.

To return the factory default setting, press the Default Definition from the Drop Down menu. See page 94 to access the Drop Down menu.

Function Group	Default Settings
Acquire	Mode: Sample Interpolation: Sin(x)/x Record length: 10k	XY: OffSample rate: 100MSa/s
Display	Mode: Vector Waveform intensity: 50% Brightness: 80% (ECO:On)	Persistence: Short Graticule intensity: 50% Graticule: Full
Channel	Scale: 100mV/Div Coupling: DC Invert: Off Expand: By ground Probe: voltage	CH1: On Impedance: 1MΩ Bandwidth limit: Off Position: 0.00V Probe attenuation: 1x
Cursor	Horizontal cursor: Off	Vertical cursor: Off
Measure	Source: CH1 Display: Off	Gating: Screen Mean & Std Dev Samples: 2
Horizontal	Scale: 10us/Div	Position: 0.000s
Math	Source1: CH1 Source2: CH2 Unit/Div: 200mV	Operator: + Position: 0.00 Div Math: Off
Trigger	Type: Edge Coupling: DC Rejection: Off Slope: Positive Mode: Auto	Source: CH1 Alternative: Off Noise Rejection: Off Level: 0.00V Holdoff: 10.0ns
Utility	Hardcopy: Save image	File format: PNG

GDS-200/300 Specifications

The specifications apply when the GDS-200/GDS-300 is powered on for at least 30 minutes.

Scope Specifications

Vertical

Channel	2 (BNC-Shield)
Input Impedance	1MΩ
Maximum Input	CATII 300VRMs
Input Coupling	AC, DC, GND
Bandwidth	DC-70/100/200MHz (-3dB)
Rise Time	<5ns / 3.5ns / 1.75ns approx.
Sensitivity	2mV/div-10V/div (1-2-5 increments)
Accuracy	±(3% x Readout + 0.1 div + 1mV)
Bandwidth Limit	20MHz(-3dB)
Polarity	Normal, Invert
Offset Position Range	2mV/div-50mV/div: ±0.4V100mV/div-500mV/div: ±4V1V/div-5V/div: ±40V10V/div: ±300V

Signal Acquisition

Realtime Sample Rate	1GSa/s
Memory Depth	5M points per channel (GDS-307/310/320)
	1M points per channel (GDS-207/210/220)
Acquisition Mode	Average: 2-256 waveforms
	Peak detect: 10ns
	sin(x)/x or ET
Replay wfms.	30,000 wfms

Trigger

Source	Ch1 or Ch2
Trigger Mode	Auto, Normal, Single, Force
Trigger Type	Edge, Pulse width, Video, Alternative
Trigger Holdoff	10ns - 10s
Coupling	AC, DC, LFR, HFR, NR

Sensitivity

DC - 25MHz: approx. 0.5div or 5mV

25MHz - 70/100/200MHz: approx. 1.5div or 15mV

Horizontal

Range	5ns-100s/Div (1-2-5 increments)
Roll	100ms/div - 100s/div
Pre-Trigger	10 div max.
Post-Trigger	1,000 div max (depend on time base)
Accuracy	±20ppm over any > 1ms time interval

X-Y Mode

Phase Shift

±3° at 100kHz

Cursors and Measurement

Cursors	Voltage difference between cursors(ΔV), time difference between cursors(ΔT), frequency measure(1/ΔT)
Auto-measurement	36 sets
Auto-counter	6 digits. Range: 2Hz to rated bandwidth
Autoset	Available

Miscellaneous

Multi-language Menu	Available
On-line Help	Available
Time and Clock	Available

Battery

Battery Power	Li-polymer 6100mA/hr, 7.4V (Built-in)
Charge Time	2.0 hour (75%)
Operation Time	4.1 hours, depending on the operating conditions.

Probe Compensation

2V, 1kHz, 50% Duty cycle

Interface

USB	USB Device (Isolated)
Internal Flash Disk	120MB

Display

Type	7 Inch
Display Resolution	480 x 800
Display Orientation	Landscape and Portrait
Backlight Control	Manual adjustable & ECO mode
Touch Panel	Capacitive

Power Adapter

Line Voltage	AC 100V-240V, 47-63Hz, Power Consumption 40W
DC Output	12V/3A, double shielded wire cable

Dimensions and Weight

Weight	1.5kg
Dimensions	HxWxD(mm) 240.2mm x 136.0mm x 59.7 mm

DMM Specifications

Basic

Reading	50,000 counts, 4 12 digits (GDS-307/310/320)
	3 12 digits (GDS-207/210/220)
Voltage Input	CAT II 600VRMS, CAT III 300VRMS

DC Voltage

Range	50mV, 500mV, 5V, 50V, 500V, 1000V, 6 ranges
Accuracy	GDS-307/310/320: 50mV, 500mV, 5V, 50V, 500V ±(0.05% + 5 digits), 1000V ±(0.1% + 5 digits)GDS-207/210/220: 50mV, 500mV, 5V, 50V, 500V, 1000V ±(0.1% + 5 digits)
Input Impedance	10MΩ

DC Current

Range	50mA, 500mA, 10A, 3 ranges
Accuracy	GDS-307/310/320: 50mA - 500mA, 2 Ranges, ±(0.1% + 5 digits), 10A ±(0.5% + 1 digits)GDS-207/210/220: 50mA - 500mA, 10A 3 Ranges, ±(0.5% + 1 digits)

AC Voltage

Range	50mV, 500mV, 5V, 50V, 700V 5 ranges
Accuracy	50mV, 500mV, 5V, 50V, 700V ±(1.5% + 15 digits) at 50Hz-1kHz

AC Current*

Range	50mA, 500mA, 10A 3 ranges
Accuracy	50mA, 500mA, ±(1.5% + 15 digits) at 50Hz-1kHz
	10A ±(3% + 15 digits) at 50Hz-1kHz

* Measure range: >10mA

Resistance*

Range	500Ω, 5kΩ, 50kΩ, 500kΩ, 5MΩ, 5 range
Accuracy	500Ω, 5kΩ, 50kΩ, 500kΩ ± (0.3% + 3 digits)
	5MΩ ± (0.5% + 5 digits)

* Measure range: 50Ω to 5MΩ

Diode Test

Maximum forward voltage 1.5V, Open voltage 2.8V

Temperature (Thermocouple)*

Range	-50°C - + 1000°C
Resolution	0.1°C
Thermocouple	B, E, J, K, N, R, S, T

* Specifications do not include probe accuracy. Temperature specifications only apply to the GDS-307/310/320.

Continuity Beeper

< 15 Ω

Continuity Beeper

Functions

Auto Range, Max, Min, Hold, Trend plot

GDS-200/300 Dimensions

Declaration of Conformity

We

GOOD WILL INSTRUMENT CO., LTD.

No. 7-1, Jhongsing Rd, Tucheng Dist., New Taipei City 236. Taiwan.

GOOD WILL INSTRUMENT (SUZHOU) CO., LTD.

No. 69 Lushan Road, Suzhou New District Jiangsu, China.

declare that the below mentioned product

Type of Product: Compact Digital Storage Oscilloscope and Multimeter

Model Number: GDS-207, GDS-210, GDS-220, GDS-307, GDS-310, GDS-320

are herewith confirmed to comply with the requirements set out in the Council Directive on the Approximation of the Law of Member States relating to Electromagnetic Compatibility (2004/108/EC) and Low Voltage Directive (2006/95/EC).

For the evaluation regarding the Electromagnetic Compatibility and Low Voltage Directive, the following standards were applied:

◎ EMC
EN 61326-1:EN 61326-2-1:EN 61326-2-2:	Electrical equipment for measurement, control and laboratory use -- EMC requirements (2013)
Conducted & Radiated EmissionEN 55011: 2009+A1: 2010		Electrostatic DischargeEN 61000-4-2: 2009
Current HarmonicsEN 61000-3-2: 2006+A1: 2009+A2: 2009		Radiated ImmunityEN 61000-4-3: 2006+A1: 2008+A2: 2010
Voltage FluctuationsEN 61000-3-3: 2008		Electrical Fast TransientsEN 61000-4-4: 2012
--------		Surge ImmunityEN 61000-4-5: 2006
--------		Conducted SusceptibilityEN 61000-4-6: 2009
--------		Power Frequency Magnetic FieldEN 61000-4-8: 2010
--------		Voltage Dip/ InterruptionEN 61000-4-11: 2004
Low Voltage Equipment Directive 2006/95/EC
Safety Requirements		EN 61010-1: 2010 (Third Edition)EN 61010-0-030: 2010 (First Edition)EN 61010-2-033: 2012 (First Edition)

INDEX

Accessories 14

Advanced DMM 156

Amplitude measurements ..... 86

Area measurements 87

Attenuation calculator .... 155

Autoset configuration ...... 103

Battery

Safety instruction 8

BNC Panel 20

Brightness 117

Buzzer 100

Calculator 158

Calibration 105

Caution symbol 5

Cleaning the instrument ..... 7

Common UI elements ...... 47

Declaration of conformity ..... 186

Default settings 94

Default settings list ...... 180

Delay measurements 88

Delete files 141

Delete folders 141

Dimensions 185

Display Overview 21

Disposal instructions 8

DMM 143

Continuity 150

Current 146

Diode 149

Resistance 147

Temperature 152

Voltage 145

EE Apps 154

EIA-96 codes....178

EN61010

measurement category ...... 6

Pollution degree....7

Environment

Safety instruction 7

Erase memory 100

Erase Memory 100

FAQ 171

File manager 139

Firmware update 175

Frequency measurements ..... 87

Front panel diagram 15

Fuse replacement 176

Gesture control 41

Gestures 25

Go-NoGo....118

Running a test 122

Graticule 116

Hardcopy configuration ...... 100

Help menu 28

Horizontal orientation ...... 34

Initial setup 30

Date & time 33

Language 34

Power up 30

Screen orientation 34

Stand 32

Intensity

Graticule 115

Waveform 114

Interface configuration ...... 165

Interface panel diagram ...... 18

Language 96

List of features 12

Mean measurements 86

Model differences ...... 12

Operation

Acquisition 107

Acquisition mode 108

ALT trigger....72

Automatic measurement options92

Automatic measurements ..... 86

Automatic measurements types 86

Autoset 78

Autoset configuration ...... 103

Channel selection .... 51

Cursor operation 83

Display 112

Display dots.... 112

Display vectors 112

Drop-down menu.... 94

Edge trigger....74

Force trigger 72

Gesture control 41

Horizontal expansion ...... 61

Horizontal position 59

Intensisty 114

Interpolation.... 111

Math 57

Panel lock 95

Panel lock 95

Persistence 113

Pulse trigger 76

Record length 110

Reference waveforms 56

Run mode 80

Selecting automatic measurements.... 90

Single trigger mode 82

Touch sounds 100

Trigger 66

Trigger level 73

Trigger mode....71

Trigger parameters.... 69

Trigger settings 68

UI elements....47

USB device port 102

Utility menu 96

Vertical menu 50

Vertical options 53

Vertical scale 52

Video trigger 77

View automatic measurements..89

XY mode.... 109

Zoom 63

Overshoot measurements ..... 87

Overview

Using the touch interface ...... 25

Peak measurements 86

Peak to peak measurement ..... 86

Power on/off Safety instruction .... 7

Probe compensation .... 34

Pulse measurements 87

QR code link app 159

Rear panel diagram 17

Recall 135

Setup 138

Waveforms 135

Remote control 165

Remote control function check166

Realterm 167

Rename files 141

Resistance calculator .... 159

Resistor codes 177

Resistor standards ..... 177

RMS measurements 86

Ruler 104

Save 124

All 133

Images 125

Setups 131

Waveforms 128

Service operation About disassembly .... 6 contact .... 172

SMD codes 178

SPC 98

Specifications 181

System date & time 99

System date and time ...... 33, 99

System information 97

Template Editor 161

Touch sounds 100

UK power cord 9

Updating the firmware ..... 175

USB device port 102

USB driver installation 31

USB OTG 102

Vertical orientation 34

Warning symbol 5