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Re: AO-40 AGC study,please read it!
- Subject: Re: [amsat-bb] AO-40 AGC study,please read it!
- From: Estes Wayne-W10191 <W10191@xxxxxxxxxxxx>
- Date: Wed, 15 Jan 2003 10:26:35 -0600
Has anybody identified the cause(s) of sudden drops in the AO40 downlink signal strength? I'm talking about when everything is working fine, and then the signal SUDDENLY drops by ~10 dB for ~30 seconds, and then SUDDENLY returns to "normal". The duration of the drop is longer than a typical LEILA attack, and I can't hear a LEILA siren when I tune up and down a few kHz.
What do you guys with panoramic receivers see in the passband when everything suddenly drops 10 dB? Has anybody noticed a geographic pattern when this occurs and doesn't occur? I suppose this could be caused by an extremely powerful SSTV or RTTY station. Or perhaps the offending signal is NOT a ham?
Wayne Estes W9AE
Mundelein, IL, USA
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