[amsat-bb] AO-85 decoding

Scott scott23192 at gmail.com
Mon Jul 11 02:44:40 UTC 2016

Hey there, Steve.

I can mention a couple of things to check, but some more info on your setup
might help.

You said that the history was that it would work for a while and then
stop.  What folder do you have your logs set for?  By chance is this a
newer computer with a relatively small solid-state hard drive?  Not running
out of HD space are you?

Along the same lines, instead of removing & re-installing, at any point did
you try the "Delete Payload Files" option?

On the RF side, I also use HDSDR.  Do you have it set to output to a
virtual audio cable at 48k?  Do you have the audio bandwidth set to around
12k?  Also on the audio side, be sure that the filter line is hard down on
the zero side of the scale.  This is certainly a case to not filter out the
low end of the audio spectrum.

In the FoxTelem software, do you have the input set to the other end of
your virtual audio device?  48k there also?  The buttons set to "auto" &

Instead of running through all the settings, I'll assume that most are at
the default.  Please reply if you have a question about any particular

When I reply to a question like this, while my particular points might not
help, I hope that some comment that I make might points you in the right
direction of makes a light bulb go off in your head in regard to some other
aspect of the hardware / software setup.

-Scott,  K4KDR
Montpelier, VA  USA


On Sun, Jul 10, 2016 at 8:11 PM, <skristof at etczone.com> wrote:

> My Fox Telemetry program is not decoding AO-85 anymore. I'm looking for
> suggestions on where to start looking for a fix.
> In the past it would sometimes stop working. At those times, I would
> Uninstall, then Install a freshly downloaded version, and that seemed to
> work fine. It would always work up until I get to around 100 data
> packets downloaded, then it would quit, so I would uninstall, then
> reinstall and I'm back in business.
> This last time, the new Install is not decoding, even on beautiful "eye
> forms" with SNR >4 and 5. Very frustrating.
> I know I'm not doing something right as I assume I shouldn't have to
> reinstall after every 100 or so downloads and I definitely did something
> wrong this time since it is not decoding at all.
> I using an RTL-SDR and HDSDR software. I know that the RTL-SDR is not
> the recommended hardware but it's what I can afford and it worked in the
> past.
> If someone can offer constructive suggestions, I would appreciate it. (I
> was climbing the telemetry board pretty quick and now I have come to a
> halt. I'd like to get back at it.)
> Thanks!!
> Steve AI9IN

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