User's Manual

T6T VHF 100 W Transmitter Page 18 Installation
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HDLC Connector
The HDLC connector is an 8-way RJ48 socket used for connecting to a Mode 2 network computer. The
connector pin-out is detailed in Table 9.
.
Table 9 HDLC Connector
Pin Signal Characteristic
1 HDLC RX A
(input)
RS422 differential synchronous data, 128 kbytes per second
(±50 ppm).
2 HDLC RX B
(input)
3 HDLC CL A
(output)
RS422 differential synchronous data, 128 kbytes per second
(±50 ppm).
4 HDLC TX B
(output)
RS422 differential synchronous data, 128 kbytes per second
(±50 ppm).
5 HDLC TX A
(output)
6 HDLC CL B
(output)
Pair to pin 3.
7Ground 0 V.
8 Output supply This output is between 21.6 and 32 Vdc (nominally 28 V) fused at
500 mA.
Pin 1
RJ48 Plug
Numbering is shown looking from the top of the connector.
The top is being viewed when the lever is on the bottom.