Controlling an Amateur Radio Rig from your PC

Controlling your amateur radio equipment from a PC can come in very handy, and here’s why:

  • Help with electronic logging – Enters the frequency and mode into your log automatically
  • Use features such as computer-controlled scanning and band monitoring
  • Very useful for controlling Push-to-Talk (PTT) with data services

In preparation for a club meeting at the Chelmsford Amateur Radio Society in Chelmsford, I thought it might be handy to document how I’m able to control my Icom IC-718 from a PC.

Connecting and Icom IC-718 to a laptop:

To connect a computer to a radio, you’ll normally need some kind of interface. This is commonly referred to as a CAT – Computer Assisted Tuning. I use the popular DigiMaster ProPlus, which handles both CAT and Data, meaning only one interface is needed.

Digimaster Pro
Digimaster Pro CAT Interface box

My Interface connects to the Icom rig via the a 3.5mm jack socket called the CI-V Remote, and then to the PC via a USB cable, as pictured here:

Connecting the Icom 718 via the CI-V CAT socket
Connecting the Icom 718 via the CI-V CAT socket

CAT Drivers:

Connection is very straightforward, and no special drivers are needed as Windows Vista and Windows 7 seem to be able to detect the CAT without a problem and install suitable drivers.

Once installed, if I look in Windows Control Panel > Device Manager, under “Ports (COM and LPT), I see two USB Serial COM ports – one is for the CAT (tuning) and one is for the PTT (data). Here’s a screenshot of what I see:

USB Ports installed for the DigiMaster Pro CAT
USB Ports installed for the DigiMaster Pro CAT

Ideally, your com ports need to be in the number range COM1 to COM 16. If they are over 16, they may not be found by your software – See the box further down the page for details on how to change your CAT’s COM port numbers.

Making the connection

To get the radio and rig to talk to each other, it’s important to get the comms settings correct. On my Icom IC-718, here’s what I have to do:

  • Set the baud rate: This is the “CI-V Baud” setting in the radio’s menu. “Auto” works for me, with the baud rate actually being 9600

That’s it.


Once you have the CAT interface connected between computer and radio, then you can use the amateur radio software of your choice – it’s a case of making sure that whatever software you install is set to use the right com port and baud rate. I’ve been able to use: Ham Radio Deluxe, JT65, Logger 32, MMSSTV and just about any other piece of software I’ve tried.

Setting up Logger 32

At the July 2013 CARS meeting in Great Baddow, one of the topics was setting up Logger32 for the RGSB G100RSGB callsign

  • Go to the Logger32 Setup menu
  • Select “Radio” from the menu
  • Select “Radio 1 configuration”
  • Set the Com port for your CAT, the correct baud rate and select your make and model of radio. Here’s what works for my Icom IC-718:
Loger32 Settings for Icon IC-718 rig
Logger32 Settings for Icom IC-718 rig

With the settings in place, now go back to the Radio menu, make sure “Use Radio 1” is clecked, and select “Open Port”:

Logger32 Radio Menu
Logger32 Radio Menu
Changing Com Port Numbers. Software such asLogger32only6 supports com ports 1 to 16. If your CAR appears on a COM highertahn 16, change it from Control Panel > Device Manager > Ports. Go to Properties for the com port, go to Port Settings > Advanced, and change the COM port there:

Device Manager Com Port Advanced Settings dialog
Device Manager Com Port Advanced Settings dialog


Here’s the Logger32 QSO entry screen showing the frequency and mode from the Icom IC-718… making entry of frequency, band and mode very easy!

Logger32 QSO entry screen with frequency info
Logger32 QSO entry screen with frequency info

For information, here’s the settings we use to connect Ham Radio Deluxe to our iCom IC-718 via the Digimaster Pro

Ham Radio Deluxe Settings for Icom IC-718 rig
Ham Radio Deluxe Settings for Icom IC-718 rig

Hope this article has been helpful. Any questions, please add them below…


  1. chris 14 March 2015 Reply
  2. Ron 16 March 2015 Reply
  3. chris 11 May 2015 Reply
  4. Pete 11 May 2015 Reply
  5. John 25 March 2016 Reply

Add a Comment

Your email address will not be published.