Table 5-3. Accessories Connector Pin Functions
Pin Designation Function Direction Notes
1 SPKR- Floating output to external speaker Output 1A
2 STOP SCAN Digital output indication for stop scan
function
Output
3 SPKR+ Floating output to external speaker Output 1A
4 EXT RX AUDIO+ Floating receive audio output Output
0 dBm, 600 Ω
5 EXT RX AUDIO- Floating receive audio output Output
0 dBm, 600 Ω
6 EXT TX AUDIO+ Floating transmit audio input Input
-9 to 0 dBm, 600 Ω
7 EXT TX AUDIO- Floating transmit audio input Input
8 PTT IN VOICE PTT for voice transmission Input
9 PTT IN DATA PTT for data transmission Input
10 PTT IN CW PTT for Morse (CW) transmission Input
11 SW A+ Primary DC voltage output Output Max 1A
12 DSI/KW C C BDM – Data serial in/kW amplifier channel
change
Output Multiplexed signals
13 KW ON OFF kW amplifier power on/off Output
14 REV CLOSE LOOP Close the loop of ALC radio Input
15 RXA Receive input (point-to-point protocol to
host/HLC)
Input
16 TXA Transmit output (point-to-point protocol to
host/HLC)
Output
17 EX RESET External RESET (for BDM) Input
18 GND Ground Output
19 KW PTT kW PTT Output
20 EXT ALARM External alarm output Output
21 VPP Flash programming voltage, input to BDM Input Not connected to
J1
22 DSC/KW ALC BDM – Data serial clock/kW amplifier ALC Input/
Output
Multiplexed signals
23 SQ GATE Squelch open or closed Output
24 DSO/FAN ON OFF BDM – Data serial out/Fan control Output Multiplexed signals
25 FREZE/KW TU BDM – Freeze/kW amplifier tune Output Multiplexed signals
26 GND Ground Output
27 FWD CLOSE LOOP ALC radio loop closure Input
28 RXC Receive input (point-to-point protocol to
host/HLC)
Input
29 TXB RS-232 protocol to VP-116, PPS, 500W,
ASTIC
Output
5-16 Cat. No. 6886859J01
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