[Elecraft] Audio artifacts in DATA A mode with KX3

[Nicklas Johnson]

I'm seeing some unexpected audio artifacts when using DATA A mode with the
latest production firmware on my KX3, on all bands.  This is something I
observe when the PBT BW is set all the way wide (4KHz) and FC is centered.

In DATA mode, there's an audio drop-off between 200 and 325 Hz, with an
almost completely dead audio "hole" between 250 and 300 Hz.  Then there's
some additional noise between 350 and 500 Hz.

If I switch to USB mode (with no EQ or audio effects applied, naturally),
all of these artifacts go away, and it's perfectly smooth across the
spectrum.  No drop-off, no noise.

Pictures of the waterfalls for comparison here: http://imgur.com/a/AjHu4

Am I doing something wrong, or is there something I should check?  I've
taken the usual steps, but it's plausible I've missed something.

​   Nick​

-- 
*N6OL*
Saying something doesn't make it true.  Belief in something doesn't make it
real. And if you have to lie to support a position, that position is not
worth supporting.