Bill, your patch is fine. I think that this remaining frequency error is due to 
the transmit soundcard. I had forgotten that I compensated for it in my old 
setup by applying the offset to the tone frequencies in the .wav file that I 
used to transmit my signal. It is apparently somewhat less than 0.1 Hz. I use 
separate sound cards for receive and transmit, and the receive one does not 
need any correction (it is well within 0.1 Hz). So I need to apply a correction 
on transmit only. Will it cause problems elsewhere if we were to make the 
requested TX frequency spinner box accept a float? i.e. if I was able to enter 
something like 1569.93 Hz in the requested frequency box, that would take care 
of my tx soundcard error…

73 Steve k9an

> On May 23, 2015, at 9:15 PM, Steven Franke <s.j.fra...@icloud.com> wrote:
> 
> Bill - Thanks! I applied the update only, not the first one. It definitely 
> helped - my requested frequency is 170 above the bottom of the segment. 
> Before the patch I was measuring 170.2 and 170.3. After the patch, I’m seeing 
> 170.1. With my old setup I always got 170.0 (all radios are referenced to the 
> same GPSDO). Certainly good enough - but I still wonder why it isn’t perfect. 
> Now that I know where to look, I will play around with it…
> 
> 73 Steve k9an
> 
>> On May 23, 2015, at 8:41 PM, Bill Somerville <g4...@classdesign.com> wrote:
>> 
>> Hi Steve,
>> 
>> A minor update to the suggested patch is attached.
>> 
>> 73
>> Bill
>> G4WJS.
>> <fp-wspr-frequency.patch>------------------------------------------------------------------------------
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