BBV Tx1000 Installation Guide download pdf (Page 13)

Tx1000 Series Telemetry Transmitter Installation Guide Rev-01 B 3 May 2001

Page 13 Total pages 14

TWISTED PAIR OPTION

The TWISTED PAIR option sends telemetry signals from the transmitter to the receiver. A video cable

connection is still required. The normal reason for using a twisted pair option is to connect to a non-cable

transmission system, fibre, microwave etc.

The twisted pair output option provides a 20mA compatible output. 1200 baud, Even Parity, 8 data bits, 1

stop bit.

Connections

Grey connector on

receiver PCB pins 1 and 2

Note units will still work if cables reversed

Multi Camera Twisted pair connections

Vertical green connector on

Camera 2,3,4 etc

470R

Fit 470R Resistor to suppress Telem signal

on static cameras

rear of transmitter Tx1000

Video cables still required

MIXED COAX AND TWISTED PAIR SYSTEMS

The Tx1000 series of transmitters copes automatically with a mixture of coax and twisted pair connected

receivers, directing the telemetry signal to the relevant interface. The only requirement is that the installer

should connect the twisted pair cable to the telemetry output corresponding to the video input.

TO SUPPRESS COAX SIGNAL

When it is required to remove the coax telemetry signal from a static camera, i.e. no telemetry required at

all, install a 470R resistor across the relevant twisted pair output contacts. Often fibre optic equipment

dislikes having a telemetry signal on its output, as it can upset the AGC.

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BBV Tx1000 Installation Guide Page 13