[App_rpt] audio setup issues with USB FOBs
Leon D. Zetekoff, NCE
wa4zlw at backwoodswireless.net
Thu Apr 10 13:41:43 EDT 2008
We purchased a few of the DMK USB FOBs awhile back after homebrewing a few.
When I was down in Virginia at company HQ last month, I spent a few
nights trying to make this work to no avail. We have an old IFR service
monitor which I was using to generate tones and such. We’re using an
Icom commercial repeater IC-FR3000/4000. The Icom has no internal
controls for rx or txaudio that I can find (documentation is very slim).
Basically, rxtune doesn't want to work with the audio coming off the
Icom repeater discriminator. I did not try deemphasized audio as I want
to keep everything flat. In looking through some of the old posts we are
seeing similar results whereby rxtune doesn’t see anything.
But oddly enough, if I used the HT to generate DTMF tones, the * box
would detect them. The transmitted audio I could not get more than 2 or
2.5 kHz deviation with the audio coming out of the * box.
As a side note, when we were using the homebrew USB FOBs we had louder
digitally generated audio (didn’t have the service monitor then) than
Got any ideas to try?
Thanks leon wa4zlw
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