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11
32 OPTION PORT PINOUT
25 pin D-sub connector for remote control is provided on the rear panel of IC-FR9010/FR9020. The functions of
each pin are as follows:
Pin No. Name Description I/O Levels Comments
1 CH 0 LSB external binary channel
selection
l 0 to +3.3 V DC 0000 is channel 1
2 CH 1 External binary channel
selection
l 0 to +3.3 V DC
3 CH 2 External binary channel
selection
l 0 to +3.3 V DC
4 CH 3 External binary channel
selection
l 0 to +3.3 V DC 1111 is channel 16
5 Unassigned
6 REM MON Remote Monitor l 0 to +3.3 V DC +3.3 V = Monitor On
7 GND Ground
8 Unassigned
9 REM D/A Remote Digital Analog select 0 V – 3.3 V +3.3 V = Analog
0 V = Digital
10 DEM OUT Discriminator audio out O
330 mVrms
1 kHz
@ ±3 kHz
C4FM on DIGITAL MODE
11 BUSY Channel busy indication O 0 to +3.3 V DC +3.3 V = busy
12 RSSI Receive signal strength
indicator
O 0 to +2.5 V DC
analog
13 MOD1 External audio modulation input l
50 mVrms
1 kHz
for ±3 kHz
14 GND Ground
15 PTT Push to talk l 0 to +3.3 V DC 0 V = transmit
16 MOD 2 External modulation input l
400 mVrms
1 kHz
for ±3 kHz
After limiter and filtering/LOW
FREQ
i.e. External CTCSS/DCS IN
17 SIMP Simplex mode selected O 0 to +3.3 V DC 0 V = simplex
18 ERR Alarm indication O 0 to +3.3 V DC Duty Cycle Determines which
alarm
19 DECODE Decode valid indication O 0 to +3.3 V DC 5 V = valid signaling
20 RX AUD 1 Buffered receive audio O
700 mVrms
1 kHz
@ ±3 kHz
1 & 2 Can produce 0 dBm into
600
Ω
input
21 RX AUD 2 Buffered receive audio O
700 mVrms
1 kHz
@ ±3 kHz
1 & 2 Can produce 0 dBm into
600
Ω
input
22 TX OUT O
23 EXT PW/SW External power switch l 0 Open
source
0 V = ON
24 Remote External channel selection
mode
l 0 to +3.3 V DC 0 V = external
25 +12 V O 12 V DC 800 mA Max out
NOTE: Pins 14, 6 and 9 are only available when pin 24 (Remote Mode) is at 0 V. See page 8 for more
information on display indications.
16


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