Hello all,
Not having a good satellite capable radio (Yet) but wanting to dabble deeper in to our world of satellite communications, I have been experimenting with CAT control of the SDR program HDSDR via the CAT interface from SatPC32 through the Virtual Serial Port Emulator (VSPE). VSPE has an option to create a serial port "Pair" of ports. In this case, you have to assign one port of the pair to SatPC32 and in HDSDR's CAT to HDSDR options, you match the baud rate in HDSDR and SatPC32 but assign the other half of the pair. Cool thing is it allows HDSDR tuning to affect the frequency listed in it's downlink window while continue to track Doppler shift adjustments provided from SatPC32. This is pretty cool.
Well I have an interesting question which may relate as much to the way SatPC32's CAT control window works as much as it relates to this Virtual serial port thing. The above mentioned ability to tune SatPC323 from HDSDR works wonderfully on Linear transponder (LSB/USB) modes but not the same on FM modes like Lilacsat-2, SO-50 and AO-85. In these cases, shifting the frequency on HDSDR does NOT change the SatPC32 display and in a few seconds, HDSDR snaps back to the CAT controlled frequency. Now the difference of course in SatPC32 CAT adjustment window is the inability to shift and store the changes in frequency, or even just shift them in FM mode like one can do with Linear sat frequencies.
Am I missing something here or is this just a built in feature of SatPC323 that I will need to work around by providing more appropriate Doppler.SQF setups that work for me as opposed to somebody else?
Anybody who has played with this please drop me a note or share your experiences via the list so more people can lear.
Thanks,
Tom Schuessler 2713 Lake Gardens Drive Irving, Texas 75060 972-986-7456 214-403-1464 (Cell) [email protected]