I have a brand new ICOM M-803 a dual role transciver (MARINE SSB and HAM). This unit has been designed to use any of a PACOR modems. I have no itentions to follow this road. I want to use WINLINK, PAT, VARA together with my LINUX box.
M-803 has a dedicated 9 pin serial port to connect with a computer. Its pins are as follow:
1 DCD Inputs terminal for carrier detection.
2 RXD Inputs terminal for receive data.
NMEA-OUT NMEA0183 ver 4.10 data output.
3TXD Outputs transmit data.
NMEA-IN NMEA0183 ver 4.10 data input.
4 DTR Outputs data terminal ready signal.
5 GND Connected to ground.
6 DSR Inputs terminal for a data-set-ready signal.
7 RTS Outputs request-to-send data.
8 CTS Inputs terminal for clear-to-send data.
9 NC No connection.
Its serial port for modem connection (PACTOR):
1 MOD+
Modulation input from an external
terminal unit.
Input impedance: More than 600 Ω
Input level: Approximately
0.77 V rms
2 MOD– Coaxial ground for MOD+. –
3 GND Ground for digital equipment. –
4 AF+
AF detector output for an external
terminal unit.
Output impedance: Less than 600 Ω
Output level: More than
770 mV rms
5 AF– Coaxial ground for AF+. –
6 GND Ground for digital equipment. –
7 NC No connection. –
8 SEND
Ground this pin to transmit. Ground level: –0.5 to 0.8 V
Input current: Less than 20 mA
9 GND Ground for digital equipment. –
REMOTE Pin Pin name Description
Finally, its ACC (round) ports pinout:
ACC Pin Pin name Description Specification
1 CWK CW and FSK keying input. Input level: –0.5 to 0.8 V
2 AF GND Ground line for AF signal. –
3 SEND
Input/Output pin.
Ground this pin to transmit.
Ground level: –0.5 to 0.8 V
Input current: Less than 20 mA
4 MOD
Modulator input.
Usable when pin 3 is grounded.
Input impedance: More than 10 kΩ
Input level: Approximately
100mV rms
5 AF
AF detector output.
Fixed, regardless of [VOL] position.
Output impedance: Less than 4.7 kΩ
Output level: 100–300 mV rms
6 NC No connection. –
7 13.6 V 13.6 V output when power is ON. Output current: Maximum 1 A
8 ALC
ALC voltage input. Control voltage: –3 to 0 V
Input impedance: More than 10 kΩ
Is it possible to create a set of cables to control this radio?
Hi, I am impressed with the speed you responded. This is very quick indeed.
Now, I have another question - how much will this cost digirig + the Serial CAT + ACC cables?
Mark,
I’d recommend you try building the cable at home or with somebody at your local club.
You can also check with https://hammadeparts.com/ if you prefer to outsource this project.
building cables is OK but I have no idea what end connectors to use where. I assume one cable with have DB9 male and the other will have the round ACC 8 pins but what on the other end of each cable and how one end relates to the other? could you provide a diagram or a sketch?
Re. parts: for prototyping and small scale build I source the components from Amazon/eBay/Aliexpress. For the cable build I typically start with the cable that already has a correct connector on one side. You can look for DB9 cable that has all needed pins wired or TRRS cable.
Re. Digirig configuration: The serial connection being DB9 and using the standard RS-232 pinout I would go with RS-232 configuration for this radio
