It has been present since the transponder's activation. I believe it is possibly some sort of image of the data downlink leaking through to the transponder passband.
It is definitely internally generated.
73,
Paul, N8HM
On Wed, Mar 27, 2019 at 9:28 AM Chuck Swiger cswiger@gmail.com wrote:
Hi - can anyone identify this signal often heard on the XW-2 birds?
http://swigerco.com/gqrx_20190311_223926_145869769.wav
I enjoy listening to the SSB qso's on them, but curious what that is, sounds almost like a very slow fax like https://www.sigidwiki.com/wiki/WEFAX
One was particularly strong this morning https://network.satnogs.org/observations/555759/ (the line around +15KHz on the waterfall) along with another weaker one.
Just curious.
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