Yes I never quite understood why it only appeared as an MFSK thing. I guess it was because it shares a similar bandwidth with it. I think using a transmitted header (similar to Patrick's Reed Solomon sequence) at the start would be a better way to define picture size & colors and it provides an automatic tuning reference - which will be important because unlike regular SSTV you don't really know in advance where the tones are going to be in the narrow digital areas of the bands.
73, Sholto KE7HPV. ----- Original Message ----- From: "Leigh L Klotz, Jr." <[EMAIL PROTECTED]> To: <digitalradio@yahoogroups.com> Sent: Saturday, January 19, 2008 7:37 PM Subject: Re: [digitalradio] Re: Redefining SSTV operations > The MFSK picture mode isn't tied to MFSK in any logical way, only in the > programs. It doesn't use MFSK modulation for the picture, for example. > > I think your plan is good and intend to put it into place, but others > with production digimode programs are better situated to do it now. > > 73, > Leigh/WA5ZNI > On Sat, 19 Jan 2008 7:34 pm, Sholto Fisher wrote: > > Andy, > > > > I agree with you - it would be nice to have a general purpose narrow > > bandwidth image mode which could be used in a stand alone fashion. > > > > The problem with MFSK16 SSTV is that it is tied to MFSK16 and you can't > > receive it if you didn't catch the MFSK "Pic:" command. > > > > Perhaps one of the programmers who frequent this group could invent an > > analog 500Hz SSTV mode that allows someone listening to start receiving > > even > > if they missed the initial "Pic:" command plus some form of automatic > > header > > (like SSTV has now) or Patrick's RS-ID for easy tuning and correct > > submode > > selection? > > > > 73, Sholto KE7HPV. > > > > > > > > > > Announce your digital presence via our Interactive Sked Page at > > http://www.obriensweb.com/sked > > > > > > DRCC contest info : http://www.obriensweb.com/drcc.htm > > > > Yahoo! Groups Links > > > > > > >
