IN1124/28/30 Transmission System • Installation and Operation

IN1124/28/30 Transmission System • Installation and Operation

Installation and Operation, cont’d

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3
Local Output connector — If desired, connect a local monitor
video cable to this 15-pin HD female connector.
The sense lines on the Local Output
connector are tied directly to the Input
connector.
4
Local audio output connector — If desired, connect the PC
audio output on this 3.5 mm, stereo jack to local powered
speakers.
Transmitted Signal Cabling
The IN1124 (figure 2-3) and IN1128 (figure 2-4) transmit
computer video and PC audio. The IN1130 (figure 2-6) receives
the transmission.
CAUTION
Do not connect these devices to a computer data or
telecommunications network
RJ-45 termination must comply with the
TIA/EIA T 568A or TIA/EIA T 568B wiring standards
for all connections.
9
10
68 87 7 11
Figure 2-6 — Installation features, IN1130
5
RGB video transmission connector — Connect one end of a TP
cable to each of these RJ-45 female connectors.
6
RGB video reception connector — Connect the free end of one
of the TP cables connected to the transmitter to this RJ-45
connector.

Termination of TP cable

Figure 2-7 details the recommended termination of TP cables in
accordance with the TIA/EIA T 568A or TIA/EIA T 568B wiring
standards. You can use either standard, but ensure you use the
same standard on both ends of the cable.
Clip DownSide
1
1&2 3&6 4&5 7&8
2345678
12345678
Pin Signal
1 Red/V. sync+
2 Red/V. sync-
3 Green/H. sync+
4 Blue+
5 Blue-
6 Green/H. sync-
7 Mono audio +
8 Mono audio -
RJ-45 connector
Twisted Pairs
Wire color
White-green
Green
White-orange
Blue
White-blue
Orange
White-brown
Brown
Wire color
TIA/EIA T 568 A TIA/EIA T 568 B
White-orange
Orange
White-green
Blue
White-blue
Green
White-brown
Brown
Figure 2-7 — TP cable termination

Cable testing

To ensure proper cable termination, each transmission cable
system that uses CAT 5 cable should be tested (Extron’s skew-
free UTP cable does not need to be tested). Testing the cable
from the RJ-45 connections at the transmitter and receiver gives
the most accurate indications of cable problems.
There are two varieties of cable runs: simple runs, in which a
single cable is terminated only at the transmitter and receiver,
and complex runs, which can include patch bays and multiple
terminations and lengths of cable. In either case, the entire
cabling system should be tested.
A complete test measures cable length and tests the wire map,
attenuation, NEXT, PSNEXT, ELFEXT, PSELFEXT, return loss,
ACR and PSACR. All of these tests are critical for digital data
transfer, but not for analog video. While all of these tests are
important indicators of the quality of the cable termination, the
most critical testing parameters for video transfer are wire map
(T-568-A or T-568-B termination) and pair length measurements.
The largest concern is equalization of skew between cable pairs.
Cable systems of 300 feet or less should exhibit no transmission
problems if they pass at least CAT 5 channel certification testing.

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