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Re: [Xylo-SDR] Wolfson --> Xylo --> USB --> PowerSDR progress
Looks nice, if we could get the noise floor to be -200dB, wow what a
radio. You think about transmitting and it would pick it up before
you sent it. :-P
At 10:47 PM 1/26/2006, you wrote:
Moving right along getting data into PowerSDR from the Xylo-Wolfson lash up
Phil (Vk6APH)and I have been working on. I'm currently running an IQ test
generator in the FPGA to make sure my code taking data from the Xylo ond
putting it into the USB is correct. Had a bug and ran into some
interesting specturm pics that I've posted on the web:
http://ewjt.com/kd5tfd/sdrfpga/specpics/index.html
My belief is that the second spectrum is actually the correct one The
effect of my bug was I was dropping 1 of every 2049 samples and that is
what produced the 1st spectrum. The 2nd spectrum is produced by what I
believe is a correct implementation. Would be interested to hear from
any of the DSP gurus on the list of the 2nd spectrum is what I'd expect
feeding a digitally pure IQ tone into PowerSDR.
Cheers,
Bill (kd5tfd)
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Cecil Bayona
KD5NWA
www.qrpradio.com
"I fail to see why doing the same thing over and over and getting the
same results every time is insanity: I've almost proved it isn't;
only a few more tests now and I'm sure results will differ this time ... "
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