ST122VGAU - Splitter StarTech.com - Free user manual and instructions

Product Type	VGA Splitter
Brand	StarTech.com
Model	ST122VGAU
Video Input	1x VGA (15-pin D-sub)
Video Output	2x VGA (15-pin D-sub)
Max Resolution	1920x1200 @ 60Hz
Signal Amplification	Built-in amplifier for signal boosting
Power Supply	External 5V DC adapter (included)
Dimensions (W x H x D)	2.4 x 1.2 x 0.8 in (61 x 30 x 20 mm)
Weight	0.2 lbs (90 g)
Maximum Cable Length	Up to 65 ft (20 m) per output
Compliance	FCC, CE
Operating Temperature	32-104°F (0-40°C)
Storage Temperature	-4-140°F (-20-60°C)
Maintenance	Wipe with dry cloth; keep away from moisture
Safety	Use only included power adapter; do not open device
Spare Parts	Power adapter available separately
Repairability	Non-user-serviceable; contact support for issues
General Information	Designed for mirroring or extending VGA displays; supports analog signals only

Frequently Asked Questions - ST122VGAU StarTech.com

How do I connect the VGA splitter?

Connect the input VGA cable from your source (e.g., PC) to the 'IN' port on the splitter. Then connect two VGA cables from the 'OUT' ports to your displays. Finally, plug in the power adapter (if required) to the splitter.

Does the ST122VGAU need external power?

Yes, it requires the included 5V DC power adapter to boost the signal for longer cable runs. Without power, the splitter may not work.

What is the maximum resolution supported?

The splitter supports resolutions up to 1920x1200 @ 60Hz. Lower resolutions like 1080p are also compatible.

Can I use this splitter to extend my desktop?

The splitter mirrors the same signal to both displays. For extended desktops, you need a different device (e.g., USB graphics adapter) or multiple video outputs from your source.

How long can the VGA cables be?

StarTech recommends cables up to 65 ft (20 m) per output when using the built-in amplifier. Longer cables may degrade signal quality.

Why is there no signal on my displays?

Check that the power adapter is connected and the LED is on. Ensure all cables are firmly inserted. Try a different source or cable to isolate the issue. The splitter may also require a VGA EDID emulator for some sources.

Is this VGA splitter compatible with Mac or Linux?

Yes, the splitter is operating system independent as it only handles analog video signals. It works with any device that has a VGA output.

Does it support audio through VGA?

Standard VGA does not carry audio. For audio, you need a separate cable or an audio extractor if your source has a combined audio/video output.

Can I connect more than two displays by daisy-chaining?

Daisy-chaining VGA splitters is not recommended as it can degrade signal quality. For more outputs, use a multi-port splitter or a distribution amplifier.

How do I clean and maintain the splitter?

Unplug the device and wipe the exterior with a soft, dry cloth. Do not use liquids or abrasive cleaners. Keep connectors dust-free.

USER MANUAL ST122VGAU StarTech.com

2 Port VGA Auto Switch

ST122VGAU

For the most up-to-date information, please visit: www.startech.com

FCC Compliance Statement

This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates, uses and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference will not occur in a particular installation. If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of the following measures:

Reorient or relocate the receiving antenna.

Increase the separation between the equipment and receiver.

Connect the equipment into an outlet on a circuit different from that to which the receiver is connected.

Consult the dealer or an experienced radio/TV technician for help.

Use of Trademarks, Registered Trademarks, and other Protected Names and Symbols

This manual may make reference to trademarks, registered trademarks, and other protected names and/or symbols of third-party companies not related in any way to StarTech.com. Where they occur these references are for illustrative purposes only and do not represent an endorsement of a product or service by StarTech.com, or an endorsement of the product(s) to which this manual applies by the third-party company in question. Regardless of any direct acknowledgement elsewhere in the body of this document, StarTech.com hereby acknowledges that all trademarks, registered trademarks, service marks, and other protected names and/or symbols contained in this manual and related documents are the property of their respective holders.

Table of Contents

Introduction....1

Packaging Contents....1

System Requirements....1

Front View....2

Rear View....2

Installation....3

Hardware Installation....3

Driver Installation....3

How to Use....3

Specifications....4

Technical Support....5

Warranty Information....5

Introduction

The ST122VGAU VGA Auto Switcher lets you share a single display between two computers and prioritize your VGA signals. The switch features a primary and secondary VGA input, and automatically outputs the signal from the primary input. When the signal feed connected to the primary input is cut or turned off, the switcher automatically defaults to the video signal on the secondary VGA input.

Packaging Contents

• 1 x ST122VGAU video switch
• 1 x Power Adapter
• 1 x Instruction Manual

System Requirements

• VGA enabled monitor/display
• VGA enabled video source(s)

Front View

Rear View

Installation

Hardware Installation

1. Connect the VGA monitor/display to the VGA output connector on the Video Switch. Power on the monitor/display.
2. Connect a male/male VGA cable from the VGA video source (i.e. computer video card) to the Port 1 VGA input on the Video Switch. This is the Primary input, so will be automatically selected, when a video signal is present.
3. Using a male/male VGA cable, connect the secondary VGA video source to the Port 2 VGA input on the Video Switch. This is the Secondary input, so will be automatically selected, if a video signal is not present on the Primary input.
4. Connect the external power adapter to the Video Switch.
5. Power on the VGA video sources one at a time. The Online LED on the front panel will light up when a video signal is found for each input.

Driver Installation

No driver or software installation is required on any computer system.

How to Use

The Primary input on the Video Switch take precedence when a video signal is present. When a video signal is no longer present on the Primary input, the Video Switch will automatically switch to the Secondary input. Once a video signal is restored to the Primary input, the Video Switch will automatically switch to the Primary input.

The selected input on the Video Switch can be manually chosen via the front panel buttons. Pressing the "Select" button for the desired input will immediately select it. This selection will remain in affect, until a video signal disconnect/reconnect is sensed on the Primary input.

Specifications

Video Signal VGA (RGB)
Number of Ports 2
Connectors	3 x DE-15 VGA female1 x Power Connector
Maximum Video Resolution 1920x1440
Video Bandwidth 250MHz
DDC Support	DDC1, DDC2, DDC2B, DDC2B+, DDC2AB(Primary port only)
Enclosure Material Metal
Power Adapter 9VDC, 300mA, center positive
Dimensions 130.0mm x 76.0mm x 42.0mm
Weight 400g

Technical Support

StarTech.com's lifetime technical support is an integral part of our commitment to provide industry-leading solutions. If you ever need help with your product, visit www.startech.com/support and access our comprehensive selection of online tools, documentation, and downloads.

Warranty Information

This product is backed by a two year warranty.

In addition, StarTech.com warrants its products against defects in materials and workmanship for the periods noted, following the initial date of purchase. During this period, the products may be returned for repair, or replacement with equivalent products at our discretion. The warranty covers parts and labor costs only. StarTech.com does not warrant its products from defects or damages arising from misuse, abuse, alteration, or normal wear and tear.

Limitation of Liability

In no event shall the liability of StarTech.com Ltd. and StarTech.com USA LLP (or their officers, directors, employees or agents) for any damages (whether direct or indirect, special, punitive, incidental, consequential, or otherwise), loss of profits, loss of business, or any pecuniary loss, arising out of or related to the use of the product exceed the actual price paid for the product. Some states do not allow the exclusion or limitation of incidental or consequential damages. If such laws apply, the limitations or exclusions contained in this statement may not apply to you.

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