Icom IC-FR9020 [16/20] Option port pinout

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

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

≈

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

15 PTT Push to talk l 0 to +3.3 V DC 0 V = transmit

16 MOD 2 External modulation input l

≈

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

1 & 2 Can produce 0 dBm into

1 kHz

@ ±3 kHz

600

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 1–4, 6 and 9 are only available when pin 24 (Remote Mode) is at 0 V. See page 8 for more