[hpsdr] ADC overload problems.

[Kjell Karlsen]

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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