Sion,
exactly, the LO frequency of the FCD should be set to a fixed frequency, e.g. the center frequency of the pass band. You "move" the TUNE frequency with HDSDR through the spectrum according the doppler correction.
73, Mike DK3WN
-----Ursprüngliche Nachricht----- Von: Sion Chow Q. C. (9W2QC) [mailto:9w2qc@9w2qc.net] Gesendet: Montag, 15. August 2011 10:47 An: Mike Rupprecht Cc: amsat-bb@amsat.org Betreff: Re: AW: [amsat-bb] Re: Decoding wideband recordings
Mike,
First of all, thank you for the very great software :)
Just to clarify, in this case you will be tuning dopper at HDSDR instead of FCD control level? Which if I get it right will result in the I/Q of the pass being recorded without doppler control?
73, Sion, 9M2CQC
Quoting Mike Rupprecht mail@mike-rupprecht.de:
Sion,
another point to the DDE aspect:
just working on the DDE link between SATCONTROL and HDSDR. At the moment HDSDR supports only Orbitron (Doppler tracking interval 1s), HRD and WXtrack.
If I change the application name of SATCONTROL to Orbitron, the link can
be
established and it works. The idea behind is to end the LO Frequency to
the
FUNCubeDonge once - and keep it fix - BUT change the TUNE frequency of HDSDR. This is possible in 1 Hz steps, so you can follow a narrowband
signal
(CW/BPSK) much continuously. (You can't change the LO Frequency of the FCD in 1 Hz steps).
73, Mike DK3WN
If HDSDR could use the DDE output of WISP, it can start recording when a satellite name appears, and stop when '*** NO Satellite ***' appears.
These are just some of my thoughts to make automatic unattended reception easier, but I must say that DK3WN's FCD control + HDSDR are really great pieces of software. Thank you to all those involved in their development :)
73, Sion, 9M2CQC
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