[Elecraft] K3 Beta firmware rev. 2.82

[Julian, G4ILO]

Richard Ferch wrote:
> 
> It seems as if part of the problem with the power control in DATA A mode
> may
> be that the power calibration appears to be done at an audio frequency
> which
> is sub-optimal for this mode. Ideally, the power calibration would be done
> at the point in the filter bandpass where the transmit filter's
> attenuation
> is least. 
> 

I agree, this would be an improvement.



> As it happens, there is another anomaly in DATA A which has some
> similarities to the above, although this may be coincidental. The SPOT
> button in other digital modes produces an audio tone at an optimal
> frequency
> (the selected mark tone in AFSK A and FSK D and the transmitted tone in
> PSK
> D), but in DATA A the SPOT button produces a tone at the CW sidetone
> pitch.
> The CW sidetone has nothing to do with DATA A mode, and it is far from the
> optimal point in the filter bandpass in DATA A. Just as it would be better
> to do power calibration at an optimal audio frequency, it would be better
> if
> the SPOT button produced an optimal tone. Good candidates for an optimal
> tone in DATA A would be either the current filter Fc or the default
> ("NORM")
> Fc for DATA A (1500 Hz).
> 

I suspect this might actually be a bug. The trouble with DATA A is that the
K3 doesn't know what center frequency the user is using (though it could
possibly guess from the filter SHIFT setting.) Personally I prefer 1KHz
because I like to hear what is going on and I find higher pitched tones
irritating.

-----
Julian, G4ILO. K2 #392  K3 #222.
http://www.g4ilo.com/ G4ILO's Shack   http://www.g4ilo.com/blog.html G4ILO's
Blog    http://www.g4ilo.com/kcomm.html KComm for Elecraft K2 and K3 
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