User's Manual Part 2
Table Of Contents
- Maintenance
- Introduction
- Scheduled Maintenance
- Unscheduled Maintenance
- Introduction
- Tools, Materials and Test Equipment Required
- T6T VHF Amplifier Procedures
- Top and Bottom Covers
- Removing and Refitting the Interface Module
- Removing and Refitting the PSU Regulation Module
- Removing and Refitting the Power Supply Modules
- Removing and Refitting the Combiner BIT Module
- Removing and Refitting the PA Modules
- Removing and Refitting the Front Panel PCB
- Removing and Refitting the Cooling Fans
- T6T VHF Drive Assembly Procedures
- Removing the Top Cover
- Removing and Refitting the Processor Module
- Removing and Refitting the PSU Regulation Module
- Removing and Refitting the Drive Module
- Removing the Bottom Cover
- Removing and Refitting the PA Control Module
- Removing and Refitting the Power Supply
- Removing and Refitting the Front Panel PCB
- Virtual Front Panel (VFP)
T6T 300 Watt VHF Transmitter Page 93 Installation
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 shown below and detailed in Table 22.
.
Table 22 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.
7 Ground 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.