[App_rpt-users] USB Radio Commands

Jim W7RY w7ry at centurytel.net
Tue Oct 9 23:35:07 EDT 2012

I changed duplex=0 to duplex=1 in usbradio.cfg

That seemed to clean up the audio. Turning on the DSP, must make the audio slightly more bassy. 

Thanks all

Jim W7RY

From: Kevin Custer 
Sent: Tuesday, October 09, 2012 6:35 PM
To: Jim W7RY 
Cc: app_rpt-users at ohnosec.org 
Subject: Re: [App_rpt-users] USB Radio Commands

I reconstructed the following query, as the answer to your question was already in the text you pasted.


  So if this setting txprelim=yes   is: 

  TX audio processing. Options: (no,yes).

  Choosing yes turns on transmitter preemphasis and peak limiting, along with a lowpass filter. The yes option is used when driving an FM transmitter directly by injecting audio right into
  the modulator.


  What is the setting?

  The no option provides audio which should be injected into the microphone input of the transmitter or at some point in the transmitter' speech amplifier before preemphasis, and limiting.
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