[hpsdr] ADC overload problems.
Kjell Karlsen
la2ni at online.no
Tue Oct 16 10:47:34 PDT 2012
Hi All.
I have had some problems lately that I have never seen before after I
started to use HPSDR. I have never before received so strong signals that
the ADC Overload shows but during the last days I had ADC Overload several
times. At the same time I saw hundreds of spurs across the whole 80 meter
band with strength around S9+ 20-30 dB. I used my Marconi Spectrum
Analyzer and located the signal to 4,545 MHz the first time and the
strength was up to +10 dBm. It was keyed very fast, 150-200 pr. sec. but
no code sent as far as I heard. Today a signal is on at 4,040 but now it
is continuous with AM modulation (3,5 KHz and 100% modulated). The
strength is up to + 10 dBm on my 80 meter loop antenna. It is on and for a
few minutes.
Another Ham around 6 Km from me has about the same signal strength as I
measure.
We are going to see if we can locate this transmitters. I am quite sure it
has not been active before.
73, Kjell
På Tue, 16 Oct 2012 17:00:10 +0200, skrev Jeff Cook <jeffrie at talktalk.net>:
> ***** High Performance Software Defined Radio Discussion List *****
>
> Thanks for the information Dave, that is going to be my next project,
> cheers.
>
> Jeff Cook, G0AFQ.
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