WSJT-X and the Icom IC-7610

I’m not quite sure what posessed me, but I bought an IC-7610 at HRO in Oakland, the last one they had in stock at the time. I guess COVID-19 disrupted manufacturing and has created unevenness in radio supply lines. I figured with all that time at home, maybe a new radio was in order before they sold out.

OK, first the radio settings:

  • Menu/Set/Connectors/MOD Input/ Data-1 MOD set to USB
  • Menu/Set/Connectors/CI-V/CI-V USB Baud Rate set to 57600
  • Menu/Set/Connectors/CI-V/CI-V USB Echo Back set to On

Now for the software setup:

  • Install the Silicon Labs driver here.
  • Install the WSJT-X software here.
  • You’ll need a USB 2.0 cable. The Tripp Lite one on Amazon works and has ferrites on it.
  • Power off both your PC and radio. plug the USB cable into the PC and the radio. Note that the 7610 has 2 USB ports on the back, one for computer control, and one for digital data I/O. You want the one closest to the speaker jacks (USB 1). Please consult the manual. Power on the radio. When radio is on, power up the PC. The order is important here, it means the radio will be online and discovered when the PC boots.

Start the WSJT-X software. 

Now set Radio in WSJT-X to the IC-7610, select the Silicon Labs Serial Port, Baud at 57600, Data bits at 8//1/none and PTT Method at CAT/Data/Rig per the screen shot below. then move to the Audio tab and select the USB Audio Codec’s.

Click “OK” and go back to your main screen and select “Monitor” to start the scope. 

Set your band (I’m in 20M above) and run a manual tuning cycle and your power out levels. You should be good to go.

I’d strongly suggest checking your MIDI volume levels driving the Output. I had to set mine to -64db to get the ALC to acceptable levels. Note that I did not change the default USB Modulation levels on the radio. 

A few closing thoughts:

  • The 7610 has 3 data modes, this should put the radio in Data-1. 
  • Since you’re using SPLIT, it will activate both receivers and transmit from the sub receiver settings.
  • You’ll need to set filter bandwidth, attenuation, etc. on both receivers by hand, for each band. Since I live in the city and have a 40/20 dipole, I usually run 18db of attenuation on both bands all the time.
  • Suggest you turn on Menu/Meter so you can keep an eye on power, ALC, SWR, etc.

© Alan W Dye 2020