Operator's Manual

OM-E 2072-09689-00
B-4
B-2.2 ACCESSORY Connector
The ACCESSORY connector is a 25-pin D-type male connector. Table B-5 lists the pin functions of
the ACCESSORY connector.
Table B-5. 25-Pin ACCESSORY Connector, Pin Functions
Pin Designation Description
1 SPKR-
Differential output to the external 8Ω, 5W speaker
2 EXT RX DATA+
Baseband output (0 dBm, 600Ω) to external device, unsquelched
3 SPKR+
Differential output to the external 8Ω, 5W speaker
4 EXT RX AUDIO+
5 EXT RX AUDIO-
Differential receive audio output (0 dBm, 600Ω; not affected by the
volume control, but controlled by the squelch)
6 EXT TX AUDIO+
7 EXT TX AUDIO-
Differential transmit input (600Ω input impedance; 0 dBm is required for
full power)
8 PTT IN VOICE Transmission command (short to ground) for voice signals
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 RF power amplifier channel change
13 KW ON/OFF Optional RF power amplifier power on/off output
14 EXT RX DATA-
Baseband output (0 dBm, 600Ω) to external device, unsquelched
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 OUT PTT output to optional RF power 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 RF power 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/kW amplifier tune
B-2.3 Headphone Jack
The headphone jack is a standard 1/4” audio jack.
B-2.4 Telegraphy (Morse) Jack
The telegraphy (Morse) jack is a standard 5.3 mm audio jack.