Thank you -- I'm working on a home-grown modulator, but I might take you up on the offer of either the loan of a modulator, or parts for one, or recommendation for a supplier.
Not sure what "pin 4" refers to in this context?
Theoretically, Pi 5 Video Out could synthesize VHF -- one would have to heavily hack the driver (change the clock rate, pretend the chroma carrier was 45MHz, remove blanking intervals, ignore all but one primary colour) and it would need a specially-contrived image buffer with explicit sync pulses and raised black level; which would make it incompatible with the desktop, media players or any standard software. No audio either. Still, it might be good for a test card or demo.
A Raspberry Pi Pico with a resistor DAC might manage it too. Neither of those is something we could recommend or sell to anyone!
Not sure what "pin 4" refers to in this context?
Theoretically, Pi 5 Video Out could synthesize VHF -- one would have to heavily hack the driver (change the clock rate, pretend the chroma carrier was 45MHz, remove blanking intervals, ignore all but one primary colour) and it would need a specially-contrived image buffer with explicit sync pulses and raised black level; which would make it incompatible with the desktop, media players or any standard software. No audio either. Still, it might be good for a test card or demo.
A Raspberry Pi Pico with a resistor DAC might manage it too. Neither of those is something we could recommend or sell to anyone!
Statistics: Posted by njh — Mon Jan 22, 2024 3:20 pm