IN1124/28/30 Transmission System • Introduction
Introduction, cont’d
IN1124/28/30 Transmission System • Introduction
Introduction

About this Manual

This manual documents the installation, features, and operation
of the Extron IN1124 and IN1128 TP twisted pair (TP)
transmitters/distribution amplifiers (referred to in this manual
as “transmitters” or “transmitter/DAs”) and the IN1130 TP
receiver (referred to in this manual as a “receiver”).

About the Transmitter/Receiver System

The Extron IN1124 and IN1128 transmitters and IN1130
receivers provide a system for long-distance distribution of
computer (RGBHV or RGBS) video and mono audio over
Extron’s skew-free A/V UTP cable or over CAT 5 unshielded
twisted pair (UTP), shielded twisted pair (STP), or foil shielded
twisted pair (FTP) cable. With adapter cables, the system can
also distribute component video or S-video and/or composite
video.

TP cable advantages

Extron’s skew-free cable or CAT 5 cable is a fraction of the size
of coaxial cable, as well as being much lighter, more flexible,
and far less expensive. These TP products make cable runs
simpler and less cumbersome. Termination of the cable with
RJ-45 connectors is simple, quick, and economical.

System distribution

The transmitters split and buffer the transmitted signal four
(IN1124) or eight (IN1128) times. The receivers each have two
RGBHV and audio outputs. With this combination of a
transmitter/DA with a local monitor and four or eight buffered
receivers, the input signal can be widely distributed.

Transmission distance

The minimum reliable transmission distance between
transmitters and receivers is 50 feet. The maximum distance is
determined by the output frequency and resolution. The table
on the following page specifies the recommended maximum
transmission distances using Extron skew-free A/V UTP cable
or UTP CAT 5 cable, terminated with CAT 5 rated connectors.
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Extron recommends using the highest quality cable
available and affordable, with less than 8 nanoseconds/
100 meters of skew (see Termination of TP cable in
chapter 2). We also recommend the use of pre-
terminated and tested cables. Cables terminated on site
should be tested before use to ensure that they comply
with Category 5 specifications.
The transmitters and receiver are designed for CAT 5
cable. The system can be used with CAT 3 cable, but
video performance will be compromised and maximum
cable lengths and video resolutions must be decreased.
Recommended transmission ranges at 60 Hz
Video format Maximum range
Composite video and audio 800 feet
Component video and S-video 800 feet
640 x 480 500 feet
800 x 600 400 feet
1024 x 768 350 feet
1280 x 1024 300 feet
1600 x 1280 250 feet
It is possible to exceed the recommended distances,
however, image quality may be reduced.

About the TP Transmitter/DAs

The Extron IN1124 inputs RGB video and computer audio,
converts the input to an output comprising the video and audio,
and distributes and transmits four identical proprietary signals
over TP cables to up to four IN1130 TP receivers. The IN1128
distributes and transmits eight proprietary signals on TP cables.
Both transmitter models provide a buffered local monitor video
output.
Both transmitter models sum the left and right channels of the
unbalanced stereo audio input and transmit mono audio on the
left and right channels. The transmitters have a local audio
output on a 3.5 mm female mini jack connector.
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