Extron electronic IN1128 Transmitted Signal Cabling, Termination of TP cable, Cable testing

Installation and Operation, cont’d

3Local Output connector — If desired, connect a local monitor

video cable to this 15-pin HD female connector.

5	1	The sense lines on the Local Output
15	11	connector are tied directly to the Input
		connector.

4Local 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.

10

7 8 7 8 11 6 9

Figure 2-6 — Installation features, IN1130

5RGB video transmission connector — Connect one end of a TP cable to each of these RJ-45 female connectors.

6RGB 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.

Side	Clip Down
	1 2 3 4 5 6 7 8	RJ-45 connector
		TIA/EIA T 568 A	TIA/EIA T 568 B
	Pin	Wire color	Wire color	Signal
	1	White-green	White-orange	Red/V. sync+
	2	Green	Orange	Red/V. sync-
	3	White-orange	White-green	Green/H. sync+
	4	Blue	Blue	Blue+
	5	White-blue	White-blue	Blue-
	1 2 3 4 5 6 7 8
	6	Orange	Green	Green/H. sync-
	7	White-brown	White-brown	Mono audio +
	8	Brown	Brown	Mono audio -

Twisted Pairs

1&27&8

3&6 4&5

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.

2-6 IN1124/28/30 Transmission System • Installation and Operation IN1124/28/30 Transmission System • Installation and Operation 2-7