I have mine set up and working. Did you make sure the correct sound card is set? One way to troubleshoot is to see if the TX light comes on if you set the signalink USB as the default sound card and any app makes sound. That will give you the knowledge that the cables and SL are working. Then you can try and see why the particular app isn’t triggering the TX.

----- The problem with the world is that the intelligent people are full of doubts, while the stupid ones are full of confidence.

On Mar 11, 2019, at 09:08, NA1SA Loon [email protected] wrote:

I'm attempting to set up Doppler PSK with a SignaLink USB. In the "Audio Device" menu there is the option to select "SignaLink USB Audio CODEC). It will not key up. Any suggestions on how to make this work?

Loon NA1SA FN10 AMSAT 41057 _______________________________________________ Sent via [email protected]. AMSAT-NA makes this open forum available to all interested persons worldwide without requiring membership. Opinions expressed are solely those of the author, and do not reflect the official views of AMSAT-NA. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://www.amsat.org/mailman/listinfo/amsat-bb