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TWISTED PAIR OUTPUT
The TWISTED PAIR output 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 8 data bits 1 stop bit, Even
parity.
Simple twisted pair telemetry when not practical to use up-the-coax telemetry.
A coaxial cable is required to carry the video from the camera to the control point.
Maximum cable resistance 330R
B B
V
1
2
#
PROGRAM
3
4
IRIS
FOCUS
5
6
7
8
PRESETS
LENS
Tx300-400-1000MK2-1000 Keypad-Ex4 MK2-TxLD Installation Guide 12Jan05.doc
Tx400 (1-2-1 controller)
If RF/Laser/Microwave etc. used
to extend link, 20mA input may
Tx300/400/400DC
AUTOPAN
ZOOM
&
PAN
TILT
Polarity not important at Rx.
be polarity sensitive.
If the Rx is over driven from the RF/
Laser/Microwave equipment, the error
LED will light. Connecting a 470R
resistor across Pin 1/2 cures problem.
Section of Rx
Grey connector on Rx PCB, Pins 1 & 2
Page 13
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