16-08-2019, 09:49 AM
(16-08-2019, 09:28 AM)ppppenguin Wrote: The LM1881 is fine for most purposes. When you need precision sync separation and something that will work with trisync (as used on HD analogue) you need something better. I look back over my older designs and see precision sync separators that I've designed from discretes. No point now when good chips are around.I'm more likely to be looking at VGA and progressive component on my scope than doing anything else. It's a Hameg so not great TV sync and no delay timebase.
I've been offered a working Closed Caption decoder designed to go between VHS and TV. I'm curious as to what it does. I remember in BBC to "fix" bad sync 625 tape playback they discovered that putting a Sound-in-syncs box inline "fixed" it.
I had a Salora TV once that couldn't display some Sky Setbox programs (We "rented" a sky Box Office film) and some pre-recorded VHS tapes. I'm sure it was the evil analogue anti-piracy scheme.
I support copyright, but all anti-piracy schemes (Analogue, CSS, HDCP, DRM, Steam etc) just cause consumer issues, add to cost (royalties) and don't stop commercial pirates.
I wonder how the FPGA or LM1881 or the various converter ICs cope with analogue anti-piracy schemes on 625. At least not a problem with ANY 405 line source!
