Hi Bill, again,
Fine! So you will run the grabber tonite again? Looking forward to that!
If the noise was "awful" (one can even see a broad band noise during
that time which must be local) and you use no noise reduction so far, we
will surely gain some dB soon :-)
Yes, the trace was pretty exactly on the QRG and there were no other
traces like that on the whole spectrogram :-)
About noise reduction: If you want, i can send you a usr file where you
can see how to arrange that if you don't know how. Where does the AF
comes out on your RX (e.g. 137 kHz = 1 kHz) ? What is the RX? A HF TRX
with a SSB filter?
73, Stefan
Am 07.09.2011 15:02, schrieb Bill de Carle:
Stefan:
No noise blanking or noise reduction enabled and changed to a slower
scroll rate later. Sound card sample rate was locked to GPS. QRN
last night was pretty awful. Thanks for the tips. Ok on further
tests. Conditions will surely improve as we get more into the fall
season. I'll start earlier in the evening next time.
73,
Bill VE2IQ
At 08:36 AM 9/7/2011, Stefan wrote:
Hello Bill,
This looks very promising to me, although ID is still insecure.
21 mHz is a good choice but you should have enabled "one pixel per
FFT bin" in the 1st register card of the spectrum display settings.
Furthermore the spectrogram should scroll a bit slower, about 10
seconds per pixel is best i find.
Which noise reduction setting did you choose? Any band limiting and
noise blanking?
All in all i would say that this is my trace since time and frequency
matches. But we should repeat this once again for beeing sure :-)
Looking forward to that!
I will TX this night again, unless the rain isn't to strong (have
replaced that stone pot above the coil since it causes to many
losses...).
Thanks for watching! Very interesting :-)
73, Stefan/DK7FC
Am 07.09.2011 14:23, schrieb Bill de Carle:
At 04:14 AM 9/7/2011, Stefan wrote:
Hello Bill,
Fine :-) Can we have a capture showing the trace? What was the time
of the detection?
73, Stefan
Am 07.09.2011 03:23, schrieb Bill de Carle:
Grabber is on tonight in Ontario Canada. If I stand far back and
squint I'd say there was a trace (not decodable) on his frequency :-)
I should have included a link to the capture. Freq is right but
maybe it was some other signal? FFT was 21 mHz per bin and the
trace occurred at approx 0055 .. 0110 - Here it is:
http://www.nrtco.net/~ve2iq/grabs/capt15.jpg
Bill VE2IQ
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