<Meino.Cramer <at> gmx.de> writes:
> > media-sound/qjackctl http://qjackctl.sourceforge.net/ > And master James moved slightly and asked a simply question. > Suddenly the novice was enlighted. > He answers "It is used for my PC." And after a while he added: > "I want to decode sstv and weather fax." SSTV? really? now you are just teasing an old (EE) fart? That's a real application, it just hard to keep the sync bit stable..... > And in the distant a little radio whispers > "Di da da di di da da da di da di di". Once (in my youth) I dated a young, friendly lass, named 'Candy Morse' do da da do da da..............! > And the fog raises and everything becomes clear as it was in > the beginning. This is unknown to me; but you might find help if you get sstv audio signals parsed out of your serial line signal, if I am to speculate what you are really after? You may need a spectrum analyzer to identify and isolate the audio signal since the signal is a superposition (hybrid) signal. It might be best to filter the audio signal out in the Rf domain, as opposed to it's digital derivative signal. http://users.belgacom.net/hamradio/index.htm under software he has rx-sstv for windoz. Get it working under doz and then hunt for a linux setup, using windows to verify it all works (hardware wise) first, is one possible path. Also : http://www.dxatlas.com/SstvTools/ and in portage (just to be complete) media-radio/qsstv Also verify the chipsets used (dongle?) and their reliability at various frequencies. Those chipssets that are wideband, are always problematic, imho........ Most of the crap (dongles) floating around are not very good. Me, I'd go to the trouble to find a new chipset, including filters and LNAs (low noise amplifiers) to build a decoder box. You could probably sell them. If you go that route, drop to me privately. Dowload PDF - Image Communication on Short Waves www.sstv-handbook.com/download/sstv_04.pdf good hunting! James
