I've been playing around with Quisk on my Linux Mint 16 laptop and it
seems to work pretty well as a panadapter for my KX3 using the I/Q
outputs. I paired it up with a EMU 0202 I had laying around from my
LP-Pan install and with some tweaking of the config settings, I am able
to see 192kHz spectrum.
One of the problems I see with this setup is that Quisk does not track
the IF shifting that occurs under certain conditions i.e. AM mode shifts
11Khz, LSB or USB when switching in the Weaver demod raises or lowers
the IF 1.5kHz and then the RX Shift of 8kHz. Maybe there are more? Quisk
will stay on and report the VFO freq but the whole display is shifted
with the IF and you really aren't looking at the right spot anymore. Not
to mention that if I'm monitoring the audio through my laptop that it is
now tuned off the reported VFO and now looking at the shift.
I thought about playing around with the Quisk code and in particular the
config code for the rig interface to monitor the IF shift of the rig in
hopes of compensating for the offset. Quisk uses hamlib as the interface
to the rig and I can use the rigctl app in Linux to query the KX3 to
test commands.
My question is to those who might know, is there a command to figure out
what the IF shift is set at any given moment? I looked through the
programmer's reference but could not find what I need. I thought the IS
command might work but I think it reports the shift in the audio passband.
I think I read recently that HDSDR compensates for the AM shift so I
think it is doable. Or maybe they just monitor the mode and manually
shift the scope based on the mode. HDSDR looks very nice, but I'm trying
to stick with Linux for the time being for various reasons. Any insight
would be appreciated.
73,
Dave W8FGU
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