[Elecraft] KX3 I/Q output and band width

[gt-i at gmx.net]

Hello,
for a long time I just haven't looked into the details, but now I did
and I'am confused.
When I plug it into a soundcard it appears to show the current station
in the center of the display, to my understanding the center of the
display is the half of the sampling frequency of the sound card.
This ist at least confirmed in the manual pg. 26 (Rev C5).

When I sample the I/Q signal by myself, the same signal appears at the
lower end of my spectrum.
Now it looks like I'm not getting the full bandwidth sampled? With fs of
44.1kHz I can only see 22kHz of bandwidth after FFT.

So, according to many articles I read about FFT, the resulting bandwidth
is always fs/2. So how can we see 44kHz of spectrum on a 44kHz sound
card? I'm confused...

73 Gernot DF5RF