Specifications

MICOM-2ES/2RS/2TS ALE Supplement to Owner’s Guide
Table 1. 44-Pin Accessories Connector, Pin Functions
Pin Designation Description
1 SPKR-
Differential output to the external 8Ω, 8W speaker
2 STOP SCAN Digital control input for stop scan function
3 SPKR+
Differential output to the external 8Ω, 8W speaker
4 EXT RX AUDIO+
5 EXT RX AUDIO-
Differential received audio output (0 dBm; 600Ω; not
controlled by volume, but affected by squelch)
6 EXT TX AUDIO+
7 EXT TX AUDIO-
Differential transmit audio 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 C C BDM – Data serial in/kW amplifier channel change
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)
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 kW amplifier
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/kW amplifier ALC
23 SQ GATE Squelch open/closed indication output
24 DSO/FAN ON/OFF BDM – Data serial out/Fan control
25 FREEZE/KW TU BDM – Freeze/kW amplifier tune
26 GND Ground
2
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