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Panadapter #qcx

Jim - AC0OW
 

Saw the picture of the QCX in panadapter display mode. ?How do I get mine to do that?
 

Hi Jim

You mean the picture in the Dayton FDIM seminar presentation slides? Yeah, you don't get it to do that... it was something I was experimenting with. The rightermost 8 characters of the display were custom-programmed to turn it into a 20 pixels wide, 16 pixels high graphics display; then I implemented a full FFT with 20x 50Hz buckets centred on 700Hz. I spent 2 whole days on it. It did work. But I abandoned the idea since there was an awful lot of much more important firmware remaining on QCX before I could finish it, and I was under time pressure (for YOTA 2017's summercamp buildathon). I realized it would be difficult to integrate it with the rest of the QCX features. Probably not impossible. Just difficult, which would mean it would need time, and time I did not have!

73 Hans G0UPL

On Tue, May 29, 2018 at 4:46 PM, Jim - AC0OW <ars.ac0ow@...> wrote:
Saw the picture of the QCX in panadapter display mode.? How do I get mine to do that?


 

Hello, I was thinking that an add-on pan adapter would be a fun project to try.
And knowing just enough to know that I know nothing about this, I thought I'd ask what may be a "simple" question.
Can I get I&Q from pins 1 and 7 from IC5 of the QCX to feed an external pan adapter?
And is it Analog baseband at these pins?
And what's the bandwidth?
and is QSX coming out during hamvention or FDIM, Wink Wink Nudge Nudge say no more.
?
 

Hi Michael,

I've tried it from IC5 pins 1 and 7 and it did seem to be baseband audio at that point. I got at least 0 to 24kHz bandwidth feeding my homebrew panadaptor. It was a little experiment into 'what if' rather than anything else so I didn't pursue it.? However, just looking at the circuit diagram it is meant to be DSB at that point so I wonder if it really is baseband audio there.

Be interested to know.

73 Simon
G0FCU.


On Wed, 10 Apr 2019, 04:54 Michael Bridak, <michael.bridak@...> wrote:
Hello, I was thinking that an add-on pan adapter would be a fun project to try.
And knowing just enough to know that I know nothing about this, I thought I'd ask what may be a "simple" question.
Can I get I&Q from pins 1 and 7 from IC5 of the QCX to feed an external pan adapter?
And is it Analog baseband at these pins?
And what's the bandwidth?
and is QSX coming out during hamvention or FDIM, Wink Wink Nudge Nudge say no more.
?
 

IC5 pins 1 and 7 and it did seem to be baseband audio at that point. I got at least 0 to 24kHz bandwidth
Simon, Michael,

They will be IQ signals but the QCX is not intended to be wideband.
I'd think C4,7,43-46 would really need reducing.

73 Alan G4ZFQ

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