Datron TW7201I, Manual

Page: 80 / 106

5: Testing and Troubleshooting
TW7201I-MS 5-19
5.3.2
DHSL Modem
Board
Table 5-11 DHSL Modem J1 Pin Assignments
Pin Signal Description
1 GND Chassis ground
2 GND Chassis ground
3 +12V Unreg12 Vdc
4 +12V Unreg12 Vdc
5 PB7 Parallel data input from fp processor
6 PB6 Parallel data input from fp processor
7 PB5 Parallel data input from fp processor
8 PB4 Parallel data input from fp processor
9 PB3 Parallel data input from fp processor
10 PB2 Parallel data input from fp processor
11 PB1 Parallel data input from fp processor
12 PB0 Parallel data input from fp processor
13 FPCWKEY CW key input (turns on the CW oscillator)
14 FPCWA Not used
15 FPSWP1 Not used (spare)
16 FPPTT Input from front panel processor that
indicates a front panel PTT
17 FPSPITXD Serial peripheral interface transmit data
18 FPSPIRXD Serial peripheral interface receive data
19 FPSPICLK Serial peripheral interface clock
20 FPBITE BITE output to transceiver processor
21 ENA Enable line for serial data input
22 FPSWP2 Spare port
23 DHSLMSEL DHSL modem select (high selects the
DHSL Modem board)
24 FPTCALM TC/SC/TA alarm output. Open collector
output from front panel. Goes to external
TC/SC/ TA alarm
25 PRMICA Processed microphone audio
26 PWRON\ Power on input (active low)
27 EXTSPKR External speaker output
28 CWKEY CW key line output