DVIGear DVI-3120a User Manual

User Guide

DVI to VGA Scaler/Converter

DVI-3120a

Table of Contents

Section Page

1.0 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

2.0 Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

3.0 Chec

4.0 Connecting the Hardware . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

5.0 Operating The Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

6.0 T

7.0 Limited

8.0 Regulatory Compliance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

king Package Contents . . . . . . . . . . . . . . . . . . . . . . . . . 4

roubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Warranty. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

1.0 INTRODUCTION

Thank you for purchasing this DVI-3120a DVI to VGA Converter/Scaler from
DVIGear. The DVI-3120a is designed to convert digital DVI input signals to analog
RGB (VGA) output signals. Our professional video conversion products have
been serving the industry for several years. DVIGear offers a full line of high
quality Video Scalers, Scan Converters, Analog-Digital Converters and DVI/HDMI
Converters, as well as Signal Switchers and Distribution Amplifiers.

1.1 Liability Statement

Every effort has been made to ensure that this product is free of errors. DVIGear
cannot be held liable for the use of this hardware or any direct or indirect
consequential damages arising from its use. It is the responsibility of the user of
the hardware to check that it is suitable for his/her requirements and that it is
installed correctly. All rights reserved. No parts of this manual may be reproduced
or transmitted by any form or means electronic or mechanical, including
photocopying, recording or by any information storage or retrieval system without
the written consent of the publisher.

DVIGear reserves the right to revise any of its hardware and software following its
policy to modify and/or improve its products where necessary or desirable. This
statement does not affect the legal rights of the user in any way.

All third party trademarks and copyrights are recognised. The DVIGear logo is a
registered trademark of DVIGear, Inc. All other trademarks are the property of their
respective holders.

1.2 Features

•

Ultra-Compact, High Performance Units

• Converts DVI Inputs to RGB Outputs

• The input may be DVI or HDTV signals in RGBHV, YPbPr or YCbCR data
bitstream via a 24 pin DVI connector

The output may be Analog VGA, or HDTV in the format of analog RGBHV

•
or YPbPr via an HD15 VGA connector

•

Automatic Detection of Input Resolution

• DVI input allows low loss conversion of signals

• 48Mb Frame Memory

• Output Picture Adjustments for: Brightness, Contrast, Color and H/V Position

• On-Screen Display for Setup and Adjustment

• Rugged Metal Case

• Locking DC Power Connector for Security

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1.3 Getting the Best Results

There are many factors affecting the quality of results when scaling video signals.
Some basic precautions will ensure the best possible performance from your
Video Scaler.

Output Display Device – The quality of the output signal will depend largely upon
the type and quality of display device used. For instance, some video projectors
just look better than others.

Using Native Resolution – It is always best to set the output resolution of the
scaler to the native resolution and refresh rate of the display device. This allows
our scaler to do most of the work, which usually results in a superior picture.

Distance between the Video Scaler and the Display Device – This plays a
major role in the final result. Long distances are possible, but special measures
should be taken in order to avoid cable losses. These include using high quality
(coax-type) VGA cables and Premium DVI Cables. Line amplifiers may also be
necessary.

Output Connection Cables – Low quality cables are susceptible to interference.
They degrade signal quality due to poor matching and cause elevated noise levels.
Therefore, cables should be of the best quality. Coax-type computer cables are
recommended because of their superior internal shielding characteristics.

Interference from Nearby Electrical Devices – These can have an adverse effect
on signal quality. For example, an older computer monitor often emits very high
electromagnetic fields that can interfere with the performance of video equipment in
its proximity.

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