I wanted to play with a URI to do all the ctcss generation, and obviously audio generation.  SO I selected 9600 baud on the radio, made the configuration changes so that I was putting audio into the modulator instead of the microphone. 

I set txboost on, the txaudio to composite, and txprelim on.  Then I started testing using the radio adjustment tool.  But I could never get the audio to go loud enough to make 3khz dev.

What am I doing wrong?  I'd prefer not having to use the 12v input and the 6db amp, I would think that I should be able to drive the tnc interface pin and the modulator input when in 9600 baud mode with pleanty from the URI, but I can't seem too…

Anyone else hooked one up and made it work?

Alan

btw, txboost 0 or 1 made no difference