Operator's Manual

OM-E 2072-09689-00
B-2
Table B-2. ACCESSORY Connector, Pin Functions (Cont’d)
Pin Designation Description
9 PTT IN DATA Transmission command (short to ground) for data signals
10 PTT IN CW Transmission command (short to ground) for CW (Morse) signals
11 SW A+ Primary DC voltage current limited output (max 1A)
12 DSI/KW CC
BDM – Data serial in/optional external amplifier channel change
13 KW ON/OFF Optional external amplifier power on/off output
14 REV CLOSE LOOP Close the radio ALC loop (input from optional external amplifier)
15 RXA Receive input (point-to-point protocol to host/HLC)
16 TXA Transmit output (point-to-point protocol to host/HLC)
17 EX RESET External RESET input (for BDM)
18 GND Ground
19 KW PTT PTT output to optional external amplifier (active low)
20 EXT ALARM External alarm output (open collector, pulled to ground when external
alarm is activated)
21 VPP Flash programming voltage, input to BDM
22 DSC/KW_ALC BDM – Data serial clock/optional external amplifier ALC
23 SQ GATE Squelch open/closed indication output
24 DSO/FAN_ON_OFF BDM – Data serial out/Fan control
25 FREEZE/KW TUNE BDM – Freeze/optional external RF power amplifier tune
26 GND Ground
27 FWD CLOSE LOOP ALC radio loop closure input (from optional external amplifier)
28 RXC Receive input (point-to-point protocol to host/HLC)
29 TXB RS-232 transmit output to “smart” external accessories
30 AMP REV Maintain constant power at transceiver output (optional function)
31 RXD Receive input (point-to-point protocol to host/HLC)
32 TX AUDIO OUT Input to LORD baseband TX path from external device (for example,
modem)
33 RXB RS-232 protocol receive input to “smart” external accessories
34 RX AUDIO OUT Input to LORD baseband RX path from external device (for example,
modem)
35 RX AUDIO IN Output from LORD baseband RX path to external device (for example,
modem)
36 AMP FWD Maintain constant power at transceiver output (from optional external
amplifier)
37 VP PTT PTT output (active low) (optional function)
38 TXD Transmit output (point-to-point protocol to host/HLC)
39 TXC Transmit output (point-to-point protocol to host/HLC)