[Elecraft] Data A filter questions

[Don Wilhelm]

  Wes,

Yes, the NORM for DATA A mode is 400 Hz width, but my HI and LO knobs 
are not locked out (just tap either of the 2 knobs to change to HI and 
LO from SHIFT and WIDTH).
My DATA A filter width stays the same as I last used it, and I usually 
have the I/II presets with one set wide and the other set narrow and 
switch between them as the situation requires.  Yes, I try to move the 
VFO so the station I am working appears near 1500 Hz on the waterfall 
display.

I prefer to do most tuning in PSK operation with the VFO knob - I run 
with the AGC on, and unlike when PSK31 started, there are now many 
stations running with power in excess of 50 watts, so those stations 
cause AGC pumping if I set the passband to the full SSB width.  The 
presence of those "Power PSK Stations" has caused me to change my 
operating habits.

Your choices may be different than mine, but I am quite happy with the 
NORM default for DATA A on the K3.

73,
Don W3FPR

On 12/16/2010 1:01 PM, Wes Stewart wrote:
> I don't do much PSK operation but I was just fiddling with it and noted something puzzling (to me anyway).
>
> Data mode A, although basically a USB mode, defaults to CW-like filtering.  The "NORM" setting is 400 Hz (my CW filter width, I guess), "Shift" is 1.5 KHz (and very limited) and "LO" and "HI" are locked out.  Considering how much PSK operation is done, this is quite limiting.
>
> Is there some compelling reason that I'm overlooking why the default for this mode shouldn't be the same as SSB, with the options to have both SHIFT/WIDTH and HI and LO CUT?
>
> Wes  N7WS
>