[Elecraft] K3S Shift Setting for WSJTX

[Joe Subich, W4TV]

> I am using a width of 4 khz and using the radio in split mode.
Width of 4 KHz is useless with a 2800 Hz SSB filter.  You do not
need (and can't use) more than 3000 - 3300 Hz.

The default shift of 1500 (for DATA A) will provide relatively
flat audio response from 300 Hz to 2800 Hz with Width at 3000 Hz.
If you move the shift to 1700 the "flat area" of the audio pass-
band will be about 300 to 3000 Hz.

Remember, with a 2800 Hz filter the maximum bandwidth is 2800 Hz
between the -3 dB points.  Setting a wider DSP filter is not going
to make the flat are any wider it will only allow you to see more
of the filter skirts.  If you really need the full 4 KHz get an
AM (6 KHz) or FM (13 KHz) filter.

73,

    ... Joe, W4TV


On 7/2/2017 3:50 PM, Tom-KQ5S wrote:
> Hope this is not a dupe.  I sent it over an hour ago and nothing showed up.
> 
> I am trying to tweak my WSJTX setup.  What is the recommended shift for the
> K3S while running WSJTX?  I have the 2.8 khz SSB filter installed.  I am
> using a width of 4 khz and using the radio in split mode.
> 
> 
> 73,
> Tom - KQ5S
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