[Elecraft] K3 needs survey -- firmware and application software

[Julian, G4ILO]

Wes Stewart wrote:
> 
> If I use my XG2 as a source into the K3 and set the SSB BW to the default
> settings for my 2.8KHz 8-pole filter (100Hz to 2.9KHz) the signal which is
> S9 at its peak is still S7 at zero beat.  A 100 Hz beat note on the wrong
> sideband is still S3 and a 200 Hz beat is >S1.
> 
> The equalizer has no effect of the s-meter.  
> 
> If I run this same test on my TS-870, even with the lower pass band set to
> zero, there is no opposite sideband, nada, zip.  That's because the '870
> uses the phasing method of detection in addition to crystal and DSP
> filtering.
> 
The S meter measures the amount of signal that gets through the filters. I
don't see how the detection method would affect it.

I just ran the same test. With my 2.7KHz filter I got S6 at zero beat,
otherwise the results were much the same as yours. I admit it doesn't look
too impressive, but I don't have anything else to compare it with. The S
meters on other radios tend to be a lot more sensitive over the range up to
S9 (i.e. fewer dB per S-point) which would make the opposite sideband
rejection *look* better.

I think you can move the filter further away from the carrier by playing
with the offset values in the filter setup.

-----
Julian, G4ILO. K2 #392  K3 #222.
* G4ILO's Shack - http://www.g4ilo.com
* KComm - http://www.g4ilo.com/kcomm.html
* KTune - http://www.g4ilo.com/ktune.html

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