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Tx300-400-1000MK2-1000 Keypad-Ex4 MK2-TxLD Installation Guide 12Jan05.doc
Tx1000 MK2 (8/16 camera controller)
Page 26
TX/TPO/MK2 20mA TWISTED PAIR TELEMETRY 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
TX1000/Mk2 base unit
Optional TX/TPO MK2 20mA output
2
3
4
5
6
7
8
1
20mA OUTPUTS
9Vdc
PSU
Cat5 cable
TP input of Receiver grey connector.
Fit 470R resistor to suppress coax
telemetry if required.
(Camera 2 suppressed telemetry)
16 x 20mA telemetry
Allowing Starwiring
Use output that corresponds to camera number.
470R
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. Occasionally some equipment
dislikes having a telemetry signal on its output.
Содержание Ex4 MK2
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