On 26/01/2018 10:28, Peter Sumner wrote:
Hello Mike,
can you offer some URL's as I have exhausted my google searches for
both of those suggestions... all I get is topic about fishing for rig
split and fake it gives me pages of topics about the US president and
his fake news. have tried various other combinations but as I do not
know what they are meant to do it is hard to refine the searches.
Peter.
Hi Peter,
I think Mike may have missed that you are using EME on the microwave
bands. The facility he suggests is only appropriate and available for
the narrower modes used commonly on HF.
With respect to your original request, I do see some merits but
profiling your Tx pass band characteristics for a mode like QRA64
although it is quite tricky given the number of frequencies that need
calibration. The implementation would not be too hard as a simple table
of factors would be mapped to each tone frequency within the digital
audio synthesizer, OTOH the work to implement a maintenance facility for
the correction factors would be considerable and I doubt considered
worth the payback. Also modern rigs are dealing with this more
fundamentally by providing SSB-DATA modes tailored for AFSK operation
which have very flat pass band characteristics.
73
Bill
G4WJS.
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