VT3L - Hi-fi system SAMSON - Free user manual and instructions

Product Type	VHF Wireless System (microphone/beltpack)
Brand	Samson
Model	VT3L (beltpack transmitter)
Category	Hi-fi system (wireless audio)
Operating Frequency	173.8 to 213.2 MHz
Receiver Type	VR3TD (True Diversity) or VR3 (non-diversity)
Receiver Power Supply	12 V DC, 250 mA (AC adapter included)
VT3L Transmitter Power Supply	9 V alkaline battery (Duracell MN1604 recommended)
Battery Life	Approximately 4 hours with NiCd rechargeable battery; up to 8 hours with alkaline
VT3L Input Connector	Mini-XLR Switchcraft P3 (for headset/lavalier microphones)
Receiver Outputs	Balanced XLR (600 Ω) and unbalanced 6.35 mm jack (5 kΩ)
Adjustable Output Level	-20 dBm (line) or -40 dBm (mic) on XLR
Indicators	Audio level (10% to 125%), battery (green/yellow/red), TX ON, power
Controls	Volume, squelch, gain (transmitter), output level selector
Antennas	One swivel antenna (VR3); two swivel antennas (VR3TD)
Range	Up to 500 meters (depending on environment)
Safety	Do not reverse battery; use only provided adapter; tie mains cable
Maintenance	Clean with a dry cloth; store in provided shockproof packaging
Microphone Compatibility	Samson QV, QE, Audio-Technica ATM-75, and capsules from Electro-Voice, Sennheiser, Shure (VH3)
Included Accessories	Plastic screwdriver, AC adapter, battery (not included in some cases), shockproof packaging
Dimensions (VR3TD Receiver)	Approximately 200 x 45 x 110 mm (estimated)
Weight (VR3TD Receiver)	Approximately 500 g (estimated)

Frequently Asked Questions - VT3L SAMSON

How do I power on the VT3L transmitter?

Open the battery compartment by pressing the notches, insert a 9 V battery respecting polarity, then close the cover. Use the power switch located inside the compartment.

How do I adjust the VT3L transmitter gain?

The gain is preset at the factory. If necessary, adjust the gain potentiometer using the provided plastic screwdriver while observing the receiver level display: the 100% segment should remain lit continuously.

Why is the red 'low' LED flashing on the transmitter?

This indicates that the battery is low and should be replaced quickly to avoid RF performance loss.

How can I improve the range of the wireless system?

Place the receiver high up, deploy the antennas vertically, and reduce the distance between transmitter and receiver. Avoid metal obstacles and interference. For the VR3TD, True Diversity technology optimizes reception.

Can I use a different AC adapter than the one provided?

No, use exclusively the provided 12 V 250 mA adapter. Any other adapter may damage the receiver and void the warranty.

How can I avoid parasitic noise when powering off the transmitter?

First turn down the volume of your amplifier or mixer, then turn off the transmitter. If noise persists, adjust the receiver squelch with the plastic screwdriver.

What type of microphone can I connect to the VT3L?

The VT3L accepts headset and lavalier microphones equipped with a mini-XLR Switchcraft P3 connector, such as Samson QV, QE or Audio-Technica ATM-75.

How do I use the receiver outputs?

The balanced XLR output is recommended for better immunity to interference. Use the level selector to choose between -20 dBm (line) or -40 dBm (mic). The unbalanced 6.35 mm jack output is suitable for consumer devices.

What should I do if there is sound distortion?

First check the output level selector. If distortion persists, move the microphone away from the mouth or reduce the transmitter gain using the screwdriver. For an instrument, lower the output volume.

How do I clean and maintain the system?

Use a soft, dry cloth. Do not use solvents. Store components in the provided shockproof packaging when not in use. Replace the battery if it leaks.

USER MANUAL VT3L SAMSON

Guided Tour - VR3TD Receiver Front Panel 5

Guided Tour - VR3TD Receiver Rear Panel 6

Guided Tour - VR3 Receiver Front Panel 7

Guided Tour - VR3 Receiver Rear Panel 8

Guided Tour - VT3L / VT3 Transmitter 9

Guided Tour - VH3 Transmitter 11

Setting Up and Using Your VHF TD Series / VHF Series System 12

Appendix A: VT3L Multipin Wiring Guide and Chart 51

Appendix B: Carrying Case 52

Specifications 53

FRANCAIS

Introduction 15

Produced by On The Right Wavelength for Samson Technologies Corp.

Copyright 1998, Samson Technologies Corp.

Printed May 1998

Samson Technologies Corp.

575 Underhill Blvd.

P.O. Box 9031

Syosset, NY 11791-9031

Phone: 1-800-3-SAMSON (1-800-372-6766)

Fax: [phone]

Introduction

Congratulations on purchasing the Samson VHF TD Series or VHF Series Wireless System! Although this product is designed for easy operation, we suggest you first take some time to go through these pages so you can fully understand how we've implemented a number of unique features.

Every wireless system consists of at least two components—a transmitter and a receiver, both of which must be tuned to the same channel (that is, the same radio frequency) in order to operate correctly.* The Samson VHF TD Series or VHF Series system you have purchased operates in the 173.8 - 213.2 MHz frequency range and contains either a VR3TD or VR3 receiver as well as one of the following transmitters: a VT3L belt-pack transmitter (for lavalier microphone or headset applications); a VT3 belt-pack transmitter (for instrument applications); or a VH3 hand-held microphone transmitter. For convenience and security, the VHF TD Series and VHF Series system is packaged in a custom impact-resistant polypropylene plastic carrying case that provides room for all components (see Appendix B on page 50 for more information).

The VT3L beltpack transmitter provides a Switchcraft P3 mini-XLR jack for connection to a variety of popular headsets and lavalier microphones, including:

Samson QV headset

Samson QE headset**

Audio-Technica ATM-75 headset

Audio-Technica MT-350 lavalier

Audio-Technica Pro-8HE headset**

Audio-Technica 831H-7 lavalier

Countryman IsoMax headset

Crown CM-311(E) headset

Foster ECM-40 lavalier

Sennheiser MKE-2 lavalier

Sony ECM-44 lavalier

Sony ECM-55 lavalier

Sony ECM-77 lavalier

The VH3 hand-held microphone transmitter is available in a selection of popular mic capsules, including:

Electro Voice ND 757A N/DYM dynamic

Electro Voice ND 857 N/DYM dynamic

Electro Voice BK-1 condenser

Samson Q MIC dynamic

Sennheiser MKE-4032 condenser

Shure SM58 dynamic

Shure SM85 condenser

Shure SM87 condenser

* Your receiver and transmitter have been factory preset to utilize the same channel.

**Optimized for aerobics workouts, this waterproof headset is recommended for usage in high-humidity environments such as physical fitness centers.

Introduction

The VR3 receiver provided with the VHF Series wireless system utilizes non-diversity technology, incorporating a single antenna for ease of use and minimal cost. The VR3TD receiver provided with the VHF TD Series system utilizes a patented technological breakthrough called “Microprocessor True Diversity,” whereby a single chassis houses two antennas (called “Antenna A” and “Antenna B”) and a receiver circuit. A built-in computer chip continuously scans RF signals from the two antennas and determines which one has the clearest and strongest reception, automatically (and silently) switching that signal to the receiver. This allows you to maintain the wireless communication link over a much broader area range than would be allowed by a receiver utilizing a single antenna and also virtually eliminates multipath dropouts, interference and phase cancellation problems. In addition, special sample-and-hold linking circuitry ensures that correct phase correlation is maintained at all times, with no noise or pops during antenna switching. The result is performance which exceeds that of conventional antenna true diversity systems and the highest quality audio fidelity available in any wireless system. Finally, the provision of Signetics® noise reduction produces crystal-clear sound with minimized background noise and hiss.

In this manual, you'll find a more detailed description of the features of your VHF TD Series or VHF Series system, as well as a guided tour through all components, step-by-step instructions for setting up and using your system and full specifications. If your VHF TD Series or VHF Series system was purchased in the United States, you'll also find a warranty card enclosed—don't forget to fill it out and mail it! This will enable you to receive online technical support and will allow us to send you updated information about other Samson products in the future. If your VHF TD Series or VHF Series system was purchased outside of the United States, contact your local distributor for warranty details.

SPECIAL NOTE for U.S. purchasers: Should your VHF TD Series or VHF Series system ever require servicing, a Return Authorization number (RA) is necessary. Without this number, the unit will not be accepted. Please call Samson at 1-800-372-6766 for a Return Authorization number prior to shipping your unit. Please retain the original packing materials and, if possible, return the unit in its original carton and packing materials. If your VHF TD Series or VHF Series system was purchased outside of the United States, contact your local distributor for servicing information.

Guided Tour - VR3TD Front Panel

1 3 4 1 7 VOLUME TX 80L KNL MAX. AVT A 10% 25% 75% 100% VIRT D VHF TRUE DIVERSITY RECEIVER 125% AN T B POWER SAM SON VHFP Series OFF ON 2 5 6 5 8

1: Antennas (A and B) - The antenna mountings allow full rotation for optimum placement. In normal operation, both Antenna A (the antenna on the left) and Antenna B (the antenna on the right) should be placed in a vertical position. Both antennas can be folded inward for convenience when transporting the VR3TD. See the "Setting Up and Using Your VHF TD Series / VHF Series System" section on page 10 in this manual for more information about antenna positioning.

2: Volume control - This knob sets the level of the audio signal being output through both the balanced and unbalanced output jacks on the rear panel. Reference level is obtained when the knob is turned fully clockwise.

3: "TX ON" LED - Lights when carrier signal of sufficient strength is being received by the VR3TD.

4: SQL (Squelch) control - This control determines the maximum range of the VR3TD before audio signal dropout. Although it can be adjusted using the supplied plastic screwdriver, it should normally be left at its factory setting. See the "Setting Up and Using Your VHF TD Series / VHF Series System" section on page 10 in this manual for more information.

5: A/B LEDs - When signal is being received, one of these will be lit yellow, showing you whether the (left) "A" or (right) "B" receiver is currently being used. The VR3TD constantly scans its two antennas and automatically selects whichever is receiving the strongest, clearest signal. This Microprocessor True Diversity switching is completely inaudible, but it effectively increases overall range while virtually eliminating potential interference and phase cancellation problems.

6: AF Level meter - This "ladder" display (similar to the VU bar meter used on audio devices) indicates the strength of the incoming audio signal. When the "100%" segment is lit, the incoming signal is optimized at unity gain; when the "125%" segment is lit, the signal is overloading. When only the left-most "10%" segment is lit, the incoming signal is at just 10% of optimum strength. If no segments are lit, little or no signal is being received. See the "Setting Up and Using Your VHF TD Series / VHF Series System" section on page 10 in this manual for more information.

7: Power LED - This lights green whenever the VR3TD is turned on.

8: Power switch - Use this to turn the VR3TD power on and off. When it is on, the Power LED (see #7 above) is lit.

Guided Tour - VR3TD Rear Panel

1 2 DC INPUT UNBALANCED OUTPUT CAUTION USE SIMSON AC ADAPTER ONLY -10 dB 5KΩ S. No. CH : Diversity Receiver F: BALANCED SWITCH LINE: -20dB-600Ω MIC: 4GB-880Ω MIC LINE BALANCED OUTPUT POWER RATING DC 12V, 1.5W(160mA) XLR: C/C/D Q/HOT: Q/COLD

1: DC input - Connect the supplied 12 volt 250 mA power adapter here, using the strain relief as shown in the illustration below. WARNING: The substitution of any other kind of power adapter can cause severe damage to the VR3TD and will void your warranty.

Three-panel diagram showing cable installation steps: plug, connector, and socket (no text or symbols)

Using the strain relief: Gather up a loop of wire and pass it through the strain relief, then pass the adapter plug through the loop in order to create a knot.

2: Unbalanced output* - Use this unbalanced high impedance (5K Ohm) 1/4" jack when connecting the VR3TD to consumer (-10) audio equipment. Wiring is as follows: tip hot, sleeve ground.

3: Audio Output Level switch - Sets the audio output level attenuation of the balanced output (see #4 below) to -20 dBm (line level) or -40 dBm (mic level). See the "Setting Up and Using Your VHF TD Series / VHF Series System" section on page 10 in this manual for more information.

4: Balanced output* - Use this electronically balanced low impedance (600 Ohm) XLR jack when connecting the VR3TD to professional (+4) audio equipment. Pin wiring is as follows: Pin 1 ground (shield), Pin 2 high (hot), and Pin 3 low (cold).

Guided Tour - VR3 Front Panel

1 3 4 6 VOLUME TX SOIL MINI MAX 10% 25% 75% 100% VR3 VHF FM RECEIVER POWER SAM SON Series ON 2 5 7

1: Antenna - The antenna mounting allows full rotation for optimum placement. In normal operation, the antenna should be placed in a vertical position. It also can be folded inward for convenience when transporting the VR3. See the "Setting Up and Using Your VHF TD Series / VHF Series System" section on page 10 in this manual for more information about antenna positioning.
2: Volume control - This knob sets the level of the audio signal being output through both the balanced and unbalanced output jacks on the rear panel. Reference level is obtained when the knob is turned fully clockwise.
3: "TX ON" LED - Lights when carrier signal of sufficient strength is being received by the VR3.
4: SQL (Squelch) control - This control determines the maximum range of the VR3 before audio signal dropout. Although it can be adjusted using the supplied plastic screwdriver, it should normally be left at its factory setting. See the "Setting Up and Using Your VHF TD Series / VHF Series System" section on page 10 in this manual for more information.
5: AF Level meter - This "ladder" display (similar to the VU bar meter used on audio devices) indicates the strength of the incoming audio signal. When the "100%" segment is lit, the incoming signal is optimized at unity gain; when the "125%" segment is lit, the signal is overloading. When only the left-most "10%" segment is lit, the incoming signal is at just 10% of optimum strength. If no segments are lit, little or no signal is being received. See the "Setting Up and Using Your VHF TD Series / VHF Series System" section on page 10 in this manual for more information.
6: Power LED - This lights green whenever the VR3 is turned on.
7: Power switch - Use this to turn the VR3 power on and off. When it is on, the Power LED (see #6 above) is lit.

Guided Tour - VR3 Rear Panel

1 2 AC CABLE LOCK DC INPUT UNRAL ANDID OUTPUT CAUTION USE RAM/SON AC ADAPTER ONLY -10 dB 8kΩ CABLE LOCK LOOP THRU AND TIE S. No. CH : Non-Diversity Receiver F: 3 BALANCED SWITCH LINE: -20dB-600Ω MIC -10dB-600Ω LINE BALANCED OUTPUT POWER RATING DC 12V, 1.5W(160mA) XLR 3-OHD 2-OT 3-COLD

1: DC input - Connect the supplied 12 volt 250 mA power adapter here, using the strain relief as shown in the illustration below. WARNING: The substitution of any other kind of power adapter can cause severe damage to the VR3 and will void your warranty.

Three-panel diagram showing cable installation steps: plug, plug with contacts, and plug with terminal (no text or symbols)

Using the strain relief: Gather up a loop of wire and pass it through the strain relief, then pass the adapter plug through the loop in order to create a knot.

2: Unbalanced output* - Use this unbalanced high impedance (5K Ohm) 1/4" jack when connecting the VR3 to consumer (-10) audio equipment. Wiring is as follows: tip hot, sleeve ground.

3: Audio Output Level switch - Sets the audio output level attenuation of the balanced output (see #4 below) to -20 dBm (line level) or -40 dBm (mic level). See the "Setting Up and Using Your VHF TD Series / VHF Series System" section on page 10 in this manual for more information.

4: Balanced output* - Use this electronically balanced low impedance (600 Ohm) XLR jack when connecting the VR3 to professional (+4) audio equipment. Pin wiring is as follows: Pin 1 ground (shield), Pin 2 high (hot), and Pin 3 low (cold).

Guided Tour - VT3L / VT3

1 2 3 LOW MID HIGH BATTERY SAM SON AUDIO ▶ON

1: Input connector - The input device is connected here. The VT3L is supplied with either a lavalier or headset microphone (connected via a Switchcraft mini-XLR jack), while the VT3 is supplied with a permanently connected cable that terminates at a 1/4" plug. A wiring chart showing the connections to popular lavalier and headset microphones can be found on page 49 of this manual.
2: Battery level meter - This set of three multicolor LEDs indicates relative battery power, indicating whether the installed battery is at low (red), mid (yellow) or high (green) strength. One or more of these will light whenever the VT3L or VT3 is powered on (see #5 on the next page). When all three are lit, the battery is at maximum strength. When only the red "low" indicator lights, RF performance is degraded and the battery needs to be replaced.
3: Audio on-off switch - When set to the "on" position, audio signal is transmitted. When set to the "off" position, the audio signal is muted. Because the carrier signal remains during muting, no "pop" or "thud" will be heard. Note that turning this off does not turn off the transmitter power—it is simply a way to temporarily mute the transmission of audio signal. If you don't plan on using the transmitter for extended periods, turn off the transmitter power by using the power on-off switch (see #5 on the next page).
4: Battery door release - Press gently inwards on these two indents in order to open the battery door of the VT3L or VT3 and access the Power on-off switch (see #5 on the next page) and Gain control (see #6 on the next page).

VT3 INPUT SAMSON VHF BELTPACK TRANSMITTER 4 4

Guided Tour - VT3L / VT3

VT3 INPUT SAMSON SOW POWER ON 6 5 7 SAMSON 8

5: Power on-off switch* - Use this to turn the VT3L / VT3 on or off (to conserve battery power, be sure to leave it off when not in use).

6: Gain control (trimpot) - This input sensitivity control has been factory preset to provide optimum level for the particular lavalier or headset model being used (in the case of the VT3, it is preset for optimum instrument level) and so we recommend that this not be adjusted manually. If necessary, however, you can use the supplied plastic screwdriver (see #8 below) to raise or lower the VT3L / VT3 Gain control. See the “Setting Up and Using Your VHF TD Series / VHF Series System” section on page 10 in this manual for more information.

7: Battery holder - Insert a standard 9-volt alkaline battery here, being sure to observe the plus and minus polarity markings shown. We recommend the Duracell MN 1604 type battery. Although rechargeable Ni-Cad batteries can be used, they do not supply adequate current for more than four hours. WARNING: Do not insert the battery backwards; doing so can cause severe damage to the VT3L / VT3 and will void your warranty.

8: Plastic screwdriver - Specially designed for use in adjusting the VT3L / VT3 Gain control (see #7 above) and/or receiver Squelch control (see #4 on pages 3 and 5). See the "Setting Up and Using Your VHF TD Series / VHF Series System" section on page 10 in this manual for more information.

Guided Tour - VH3

BZT xxx xxx xxx AUDIO CANADA OFF LOW MID HIGH BATTERY LEVEL Ch2 1 2

1: Audio on-off switch - When set to the "on" position, audio signal is transmitted. When set to the "off" position, the audio signal is muted. Because the carrier signal remains during muting, no "pop" or "thud" will be heard. Note that turning this off does not turn off the transmitter power—it is simply a way to temporarily mute the transmission of audio signal. If you don't plan on using the VH3 for extended periods, turn off its power by using the power on-off switch (see #3 below).

2: Battery level meter - This set of three multicolor LEDs indicates relative battery power, indicating whether the installed battery is at low (red), mid (yellow) or high (green) strength. One or more of these will light whenever the VH3 is powered on (see #3 below). When all three are lit, the battery is at maximum strength. When only the red "low" indicator lights, RF performance is degraded and the battery needs to be replaced.

3: Power on-off switch* - Use this to turn the VH3 on or off (to conserve battery power, be sure to leave it off when not in use).

4: Gain control (trimpot) - This input sensitivity control has been factory preset to provide optimum

level for the particular microphone capsule provided with your VHF TD Series or VHF Series system and so we recommend that this not be adjusted manually. If necessary, however, you can use the supplied plastic screwdriver to raise or lower the input level. See the "Setting Up and Using Your VHF TD Series / VHF Series System" section on page 10 in this manual for more information.

5: Battery holder - Insert a standard 9-volt alkaline battery here, being sure to observe the plus and minus polarity markings shown. We recommend the Duracell MN 1604 type battery. Although rechargeable Ni-Cad batteries can be used, they do not supply adequate current for more than four hours. WARNING: Do not insert the battery backwards; doing so can cause severe damage to the VH3 and will void your warranty.

SAMSON 5 3 4

* Be sure to mute the audio signal at your external mixer or amplifier before turning transmitter power on or off, or an audible pop may result.

Setting Up and Using Your VHF TD Series/ VHF Series System

The basic procedure for setting up and using your VHF TD Series or VHF Series Wireless System takes only a few minutes:

1. For the VHF TD Series / VHF Series system to work correctly, both the receiver and transmitter must be set to the same channel. Remove all packing materials (save them in case of need for future service) and check to make sure that the supplied receiver and transmitter are set to the same channel. If these channels do not match, contact your distributor or, if purchased in the United States, Samson Technical Support at 1-800-372-6766.

2. Physically place the receiver where it will be used (the general rule of thumb is to maintain "line of sight" between the receiver and transmitter so that the person using or wearing the transmitter can see the receiver). An optional rack-mount kit (available from your Samson dealer) allows the VR3TD or VR3 to be mounted in a standard 19" rack if desired. Extend the antenna or antennas and place them in a vertical position.

3. Make sure the Power on-off switch in your VT3L / VT3 belt-pack or VH3 handheld transmitter is set to "Off."

4a. If your system contains a VT3L or VT3 belt-pack transmitter, press gently inwards on both battery cover release indents to open the battery door. Note that this door is hinged and not intended to be removed from the transmitter case. Please use care when opening this door as undue force will destroy the hinge.

4b. If your system contains a VH3 handheld transmitter, unscrew the bottom section of the microphone by turning it counterclockwise and then slide it off.

1. Place a fresh 9-volt alkaline battery in the transmitter battery holder, taking care to observe the polarity markings. If you are using a VT3L or VT3 belt-pack transmitter, gently replace the battery door by swinging it up and pressing until it clicks. If you are using a SH4 handheld transmitter, replace the bottom section of the microphone by sliding it on and then screwing it back on. Whichever transmitter you are using, leave it off for the moment.

2. Make the physical cable connection between the VR3TD or VR3 output jack and the line or mic level audio input of your amplifier or mixer. If you are using the balanced XLR jack (preferable, since it will deliver an electromagnetically cleaner signal), be sure to set the receiver rear panel Audio Output Level switch correctly. If required, both the balanced and unbalanced outputs can be used simultaneously. Leave your amplifier (and/or mixer) off at this time.

3. Turn the Volume knob on the VR3TD or VR3 completely counterclockwise. Using the strain relief, connect the supplied AC adapter to the DC Input on the rear panel of the VR3TD or VR3, then plug the adapter into any standard AC outlet. Press the front panel Power switch to turn on the VR3TD or VR3; the green "Power" LED will light up, but all other front panel LEDs will remain unlit.

4. Turn on the power to the VT3L, VT3 or VH3 transmitter (using its Power on-off switch); all three Battery strength LEDs will light if the battery is sufficiently strong. At this point, the "TX" LED on the front panel of the receiver will light. If you are using an VR3TD receiver, either the "A" or "B" yellow LED on the front panel will also light, depending upon which antenna is receiving the stronger signal.

Setting Up and Using Your VHF TD Series/ VHF Series System

1. Now it's time to set the audio levels. Turn on your connected amplifier and/or mixer but keep its volume all the way down. Next, make sure that your transmitter is unmuted by setting its Audio switch to "On." Then set the Volume knob on the VR3TD or VR3 fully counterclockwise. If you are using the VH3 transmitter or if you are using the VT3L transmitter with a connected lavalier microphone or headset, speak or sing into the mic at a normal performance level while observing the VR3TD or VR3 front panel AF Level meter. If you are using the VT3 transmitter with a connected instrument, play the instrument at normal performance level while observing the VR3TD or VR3 front panel AF Level meter. If the "100%" (unity gain) segment is lighting steadily, with just occasional higher excursions, the audio level is correctly set. If not, use the supplied plastic screwdriver to slowly adjust the VH3, VT3L, or VT3 Gain control (trimpot) until the VR3TD or VR3 AF Level meter "100%" (unity gain) segment lights steadily (with occasional higher excursions). Then slowly raise the VR3TD or VR3 Volume knob to the 2 o'clock position (unity gain) and, finally, set the volume of your amplifier/mixer until the desired level is reached. If you are using a VT3L beltpack transmitter equipped with a lavalier microphone, note that correct lavalier placement is critical to sound quality. We recommend that you place it as shown in the illustration on the right—as close to your mouth as possible but off to one side (to minimize nasality) and unobstructed by clothing. Bear in mind also that omni microphones (mics which pick up signal from all directions) are more prone to feedback problems than unidirectional (cardioid or supercardioid) ones; in general, you can avoid feedback by taking care not to use any microphone directly in front of a PA speaker (if this is unavoidable, try using an equalizer to attenuate those high- or mid-range frequencies which are causing the feedback “squealing”).

Line drawing of a shirt with a tie and a zipper tag (no text or symbols)

1. If you hear distortion at the desired volume level (or if the "125%" segment LED in the AF Level meter is lighting frequently), first check that the VR3TD or VR3 rear panel Audio Output Level switch is set correctly. Next, make sure that the gain structure of your audio system is correctly set (consult the owners manual of your mixer and/or amplifier for details). If you still hear distortion, do the following:

2. If you are using a VH3 handheld transmitter or an VT3L transmitter with connected lavalier microphone or headset, its Gain control has been factory preset to provide optimum level for the particular microphone model being used and so no adjustment should be necessary. Any distortion present should therefore simply be a matter of the microphone being too close to the mouth; try moving it further away. If this does not solve the problem, use the supplied plastic screwdriver to turn the Gain control (trimpot) on the VH3 or VT3L slowly counterclockwise until the distortion disappears.

3. If you are using a VT3 transmitter with an instrument such as electric guitar or bass, lower the output level of the instrument until the distortion disappears. Alternatively, you can use the supplied plastic screwdriver to turn the Gain control (trimpot) on the VT3 slowly counterclockwise until the distortion disappears.

Note that, following this setup procedure, you can always lower the Volume knob of the VR3TD or VR3 in order to further attenuate the output signal if necessary.

Setting Up and Using Your VHF TD Series/ VHF Series System

1. Conversely, if you hear a weak, noisy signal at the desired volume level (and with the Volume control of the receiver turned fully clockwise), again make sure that the VR3TD or VR3 rear panel Audio Output Level switch is set correctly and that the gain structure of your audio system is correctly set. If it is and the signal coming from the VR3TD or VR3 is still weak and/or noisy, do the following:

2. If you are using a VH3 transmitter or an VT3L transmitter with connected lavalier microphone or headset, its Gain control has been factory preset to provide optimum level for the particular microphone model being used and so no adjustment should be necessary. Any weakness of signal should therefore simply be a matter of the microphone being too far from the mouth; try moving it closer. If this does not solve the problem, use the supplied plastic screwdriver to turn the Gain control (trimpot) on the VH3 or VT3L slowly clockwise until the signal reaches an acceptable level.

3. If you are using a VT3 transmitter with an instrument such as electric guitar or bass, raise the output level of the instrument until a good signal is achieved. Alternatively, you can use the supplied plastic screwdriver to turn the Gain control (trimpot) on the VT3 slowly clockwise until the signal reaches an acceptable level.

4. Temporarily turn down the level of your mixer/amplifier system and turn off the power to your transmitter, leaving the VR3TD or VR3 on. Then restore the previously set level of your mixer/amplifier. With the transmitter off, the receiver output should be totally silent—if it is, skip ahead to the next step. If it isn't (that is, if you hear some noise), you may need to adjust the receiver's front panel Squelch control. When the Squelch control is at its minimum setting, the VHF TD Series / VHF Series system always provides maximum range without dropout; however, depending upon the particular environment your system is used in, you may need to reduce that range somewhat in order to eliminate band noise or interference when the transmitter is turned off. To do so, use the provided screwdriver to rotate the Squelch control completely counterclockwise (to the "Min" position), then slowly turn it clockwise until the noise disappears. If no noise is present at any position, leave it at its fully counterclockwise "Min" position (so as to have the greatest overall range available).

5. When first setting up the VHF TD Series or VHF Series System in a new environment, it's always a good idea to do a walkaround in order to make sure that coverage is provided for your entire performance area. Accordingly, turn down the level of your audio system and turn on both the transmitter and receiver. Then, with the transmitter unmuted, restore the level of your audio system and while speaking, singing, or playing your instrument, walk through the entire area that will need to be covered. As you do so, the "TX" LED on the front panel of the VR3TD or VR3 should always remain lit. If you are using a VHF TD Series system, one of the yellow "A" and "B" LEDs on the VR3TD receiver should always be lit, though occasionally switching to show you which antenna is receiving the stronger signal. Always try to minimize the distance between transmitter and receiver as much as possible so that the strongest possible signal is received from all planned transmission points. In fixed installations such as A/V or corporate conference rooms or for extended range applications (where the transmitter and receiver are more than 150 feet apart), it may be desirable to angle the receiver antenna or antennas differently from their vertical position or to install the receiver in the same room as the transmitters (and, if necessary, to extend the wiring to remote audio equipment).

If you have followed all the steps above and are experiencing difficulties, contact your local distributor or, if purchased in the United States, call Samson Technical Support (1-800-372-6766) between 9 AM and 5 PM EST.

Audio-Technica MT-350 (cravate)

Audio-Technica Pro-8HE (serre-tête)**

Audio-Technica 831H-7 (cravate)

Countryman IsoMax (serre-tête)

Crown CM-311(E) (serre-tête)

Foster ECM-40 (cravate)

Sennheiser MKE-2 (cravate)

Sony ECM-44 (cravate)

Sony ECM-55 (cravate)

Sony ECM-77 (cravate)

Four-panel diagram showing cable installation steps: plug, switch, pen, and socket (no text or symbols)

1 3 4 6 VOLUME TX 10% 25% 75% 100% 125% POWER S AM SON Series OFF ON 2 5 7

Three-panel diagram showing cable installation steps: plug, connector, and socket (no text or symbols)

Line drawing of a shirt with a collar and tie, no text or symbols present

Four-panel diagram showing cable installation steps: plug, socket, plug with cable, and socket with plug (no text or symbols)

1 3 4 6 VOLUME TX 50% K N 94% POWER 10% 25% 75% 100% VR3 VHF FM RECEIVER 125% SAM SON Series OFF ON 2 5 7

Three-panel diagram showing cable installation steps: plug, plug with contacts, and plug with terminal (no text or symbols)

1 2 3 LOW MID HIGH BATTERY SAM SON AUDIO ▶ ON

Line drawing of a shirt with a tie and collar, no text or symbols present

Three-panel diagram showing cable installation steps: plug, socket, and socket (no text or symbols)

Three-panel diagram showing cable installation steps: plug, connector, and socket (no text or symbols)

Line drawing of a shirt with a tie and collar (no text or symbols)

Procedure for wiring VT3L connector: Unscrew rubber boot 1 and pass wire through 1 and 2. Solder wire to 3 after removing from 4 (use chart above). Reinsert 3 to 4 with attached wire (3 is keyed to fit 4). Plug 2 into 3 again (2 is keyed to 3) and crimp wire. Rescrew rubber boot 1 to 4.

Appendix B: Carrying Case

To ensure the longevity of your VHF TD Series / VHF Series system, and for convenience when on the road, your VHF TD Series / VHF Series system includes an impact-resistant polypropylene plastic carrying case with foam rubber padding. As shown in the illustration below, custom cutouts in the interior padding provide secure placement for all components in your system.

Technical line drawing of a medical or laboratory device case with labeled components (no text or symbols present)

Specifications

Transmitter / Emetteur / Sender / Transmisor (VT3L, VT3 and VH3):

Transmission Mode Frequency modulation, 80KF3E, 20 kHz peak deviation

Frequency Range 173.80 MHz to 213.20 MHz, 25 frequencies

Band A (European / UK models) 160.10 to 177.90 MHz

Band B (European / UK models) 189.10 to 210.10 MHz

OSC System Crystal controlled, x9 multiplication

RF Power 20 mW (USA models), 2 mW (European / UK models)

Operating Range 300 ft.

Frequency Stability ± 10 ppm

Approvals Complies with ETS 300 422 and FCC Part 74

Radiating Harmonic and Spurious Emission Below limits of applicable regulations

Antenna Type Internal

Audio Frequency Response 40 Hz to 16 kHz ±3 dB

Pre-Emphasis 50 μSec

Noise Reduction System NE571 based compandor

Signal To Noise Ratio > 100 dB

Maximum Input Level 0 dBv (VT3L, VT3), -20 dBv (VH3)

T.H.D. < 1% @ 1 kHz

Current Consumption

Battery Life (MN1604 9-volt alkaline)

Operating Temperature

Controls

VT3L / VT3

VH3

LED Indicator

Dimensions

VT3L / VT3

VH3

Weight

32 mA (typical)

14 hours (typical)

-10 to +55 degrees C

Power On/Off, Mute On/Off, Level Control (Trimpot)

Power On/Off, Audio On/Off, Level Control (Trimpot)

Battery high/medium/low

65 (W) x 22 (H) x 100 (D) mm (2.6 x .87 x 4 in.)

37 (W) x 240 (H) mm (1.46 x 9.45 in.)

110 grams · 3.9 oz.

Single conversion Superheterodyne, Microprocessor True Diversity*

VR3

Single conversion Superheterodyne, Non-Diversity

Frequency Range 173.80 MHz to 213.20 MHz, 25 frequencies

Band A (European / UK models) 160.10 to 177.90 MHz

Band B (European / UK models) 189.10 to 210.10 MHz

Receiving Mode

80KF3E

Sensitivity

< 3 μV for 20 dB SINAD, < 10 μV for 50 dB S/N

Selectivity

120 kHz BW, nominal @ -6 dB, ± 300 kHz (adj CH), -75 dB

Squelch Sensitivity

2.5 μV to 250 μV adjustable

IF

10.7 MHz

Local Oscillator System

Crystal controlled

Noise Reduction System NE571 based compandor

De-emphasis

50 μsec.

Signal To Noise Ratio

100 dB (IHF-A) line out, > 90 dB (IHF-A), mic out

Audio Frequency Response 40 Hz to 16 kHz ±3 dB

T.H.D. < 1% @ 1 kHz

Audio Output Levels

-10 dB unbalanced (1/4" phone connector),

-20 dBm / -40 dBm balanced (XLR connector)

5 kΩ unbalanced, 600 Ω balanced

Audio Output Impedance

1/4 wavelength telescopic

Antennas

-10 to +55 degrees C

Operating Temperature

Volume, Squelch, Power

Controls

LED Indicators

VR3TD

TX On / Antenna A or B (2 LEDs) / Power / AF Level (5 LEDs)

VR3

TX On / Power/ AF Level (5 LEDs)

Power Requirement

12 Volts DC, 80 mA typical (160 mA max.), AC adapter supplied

Dimensions (W x H x D, without antennas)

215 x 44 x 80 mm (8.5 x 1.75 x 3.2 in.)

Weight (including antennas)

300 g · 0.7 lb.

CE

Unit conforms

FCC Rules and Regulations

Samson wireless systems are type accepted under FCC rules parts 90, 74 and 15.

Licensing of Samson equipment is the user's responsibility and licensability depends on the user's classification, application and frequency selected.

This device complies with RSS-210 of Industry & Science Canada.

Operation is subject to the following two conditions:

(1) this device may not cause harmful interference and (2) this device must accept any interference received, including interference that may cause undesired operation.