Xiegu G90 Digital Modes with SignaLink Setup

The Xiegu G90 is a great little affordable radio which has digital capabilities. While Xiegu (CEE-eh Goo, not Zy-Goo for you non-Mandarin speakers) does supply a break out module, the CE-19 for connecting to a soundcard with digital modes, many hams prefer to use a little more robust plug-n-play setup like the Tigertronics SignaLink.

However setup information if you want to use the G90 and SignaLink together is sketchy and incomplete. I’ve spent a lot of time searching, and cobbling together the pieces from various sources including help from a couple of Elmer friends (Norm K7NWF and Don WQ1E) to get it working, so I’m going to document my own digital setup in this post in the hopes that it might be useful to someone else to have it all in one place.

What you will need:

  • Xiegu G90 Radio
  • SignaLink USB (SLUSB8PM) properly jumpered (SLMOD6PM) for the G90
  • SignaLink 8-pin Mini Din Cable (SLCAB8PM – included with the SLUSB8PM SignaLink, but you can buy one separately if needed)
  • USB B to USB A Cable
  • WSJT-X Software

(Note: No rig control – You’ll need to tune the radio to frequency yourself because the closest thing you’ll find to the G90 rig control commands are in the ICOM family of radio profiles, and not everything works properly in those profiles.)

Cable Connections:

Connect the Radio’s rear Accessory port to the SignaLink RJ45 jack using the 8-pin min-Din cable. Be careful to line up the arrow on the 8-pin connector of the cable pointing DOWN. The cable fits one way only and you can damage the socket or cable pins if you try to force it in the wrong way. (Ask me how I know that, I dare ya =) )

Connect the SignaLink to your computer’s USB port using the USB B to USB-A cable.

The computer should automatically install the drivers and treat the SignaLink as a USB Audio Codec device.

Computer Audio Configuration:

In your control panel, set the default Sound Playback and Recording devices on your computer to the regular speakers and microphone. (Your SignaLink should NOT be handling the regular computer system sounds, just the communications for the radio through the WSJT-X software.)

G90 Radio Configuration:

These settings come from OH8STN’s helpful video.

VOX – Enable VOX for the PTT setting

Line Input – Change the input from Mic to Line Input

Input Audio Levels – Set input Audio levels to 10.

Audio Out Level – Leave set to 15.

AGC – Turn AGC Off (Should Show AGC– on the display)

Power Level – Set to around 18w

SignaLink Settings:

Set the TX knob about halfway.

Set the RX knob about halfway.

Set the Delay knob to 0.

Software Configuration:

Open the WSJT-X Software.

In File > Settings

General Tab – Fill in your Callsign and Grid Square

Radio Tab – Set Radio to NONE. Set PTT Method to VOX

Audio Tab – Set the Soundcard to select your SignaLink USB Audio Codec in the Input and Output dropdowns.

Set the Power between the top two marks in WSJT-X on the right hand part of the screen.

WSJT-X Power level setting

You should now be ready to tune up your antenna to the chosen band, run the auto-tuner on your G90, and start making contacts!

Happy QSO-ing!

73 KJ7DJR