I'm now holed up in Hong Kong for a few days, but once I get to China I'll be cut off from this forum. Those that my wish to contact me can do so via my e-mail which is on the NBTVA website. My e-mail works OK in China. Don't try and send an e-mail via this forum, it probably won't get though, use your e-mail client or gmail etc..
Yes, as you see Klaas there is a sync problem, I've built up a separate side-chain to handle it which is really quite stable. But until I return to Bangkok and re-work the up-converter I can't say yet if that's that answer.
As far as programming PICs is concerned, this site is a useful tool and source of ideas...
http://www.piclist.com/techref/piclist/index.htm...it mainly deals with the 8-bit devices, even so there's little if you progress onto the PIC18 family, even though they're also 8-bit. It's mainly aimed at the PIC12 and PIC16 user.
I used to do quite a bit of programming on the Motorola MC6809 and it's variants in the early 80s, then I stopped that sort of stuff until a few years ago. But the concept was still there, it was a bit like riding a bicycle after a 30 year absence, wobbly at first, but I reached my destination unscathed. In Bangkok I'm often overtaking cars these days...it's really not that difficult when they are stationary...
Steve A.