[amsat-bb] What happened to the ISS SSTV audio level?

[Scott]

Monitoring the last (also low-EL) pass from central Virginia using SDR 
software, the issue was visually apparent.

While I don't know the underlying technical reason, there was an extremely 
strong central carrier right in the center of what should have been 
SSTV-style audio.

I could see (and hear) some of the expected SSTV audio, so it was playing. 
However, something else was also riding on the signal with so much power 
that the SSTV audio did not have a chance.

-Scott,  K4KDR

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-----Original Message----- 
From: Patrick STODDARD (WD9EWK/VA7EWK) via AMSAT-BB
Sent: Thursday, April 11, 2019 4:57 PM
To: AMSAT
Subject: Re: [amsat-bb] What happened to the ISS SSTV audio level?

Hi Greg!

It was a low pass here in central Arizona, maximum elevation
of 5.4 degrees, and I noticed the audio sounded light. The
signal strength still pegged the meter on my TH-D74, but the
audio was not what I heard on the earlier pass. I will try to
tweak the audio to see if I can get anything out of the
picture. The first run through QSSTV on my Linux (Fedora 29)
laptop showed nothing. I also have RX-SSTV on a Win10 tablet,
and will try that next...

73!




Patrick WD9EWK/VA7EWK
http://www.wd9ewk.net/
Twitter: @WD9EWK or http://twitter.com/WD9EWK



On Thu, Apr 11, 2019 at 8:47 PM Greg D via AMSAT-BB <amsat-bb at amsat.org>
wrote:

> Hi folks,
>
> Had a great pass at about Noon today, local time.  Nice strong S9
> signals, good audio, but my SSTV software didn't seem to want to decode
> it.  No idea why.  Trying again just now (1:36pm pass).  Nice strong
> carrier, but the audio is almost nonexistent.
>
> Wah happen?  Anybody else experience this?
>
> Greg  KO6TH