> On 2017-09-04, at 18:49, smf <email@example.com> wrote: > > On 04/09/2017 17:29, firstname.lastname@example.org wrote: >> I am not sure if we talk the same subject now. What I am trying to say is that there is no perceptible/measurable difference in Y/C timing between the separate and combined (composite) signals in a reference output. I can do the same with a 64, although - the same as Levente - I expect that whatever the modulator changes with its rather simplistic circuit is still negligible. >> > Sure. Timing between composite, chrominance & luminance on an 8 pin would settle the debate. This is on a 250466, don't know what exactly (what circuit) sits in the modulator there. While obviously the signal is far less clean from a 64 than from the generator, the results seem to be: - C alone and C on the composite seem to be almost exactly the reversed phase. - the "almost" is about plus 17ns for the composite C - Y alone and Y on the composite seem to be about 23ns apart - the "settling"[*] on composite is noticeably longer with some ringing That makes it about 6ns difference in Y/C luma-chroma time relation between the separated and composite. > My vague point was that if there is a difference and you're using a cable for a 5 pin c64 on an 8 pin c64 (so you're using composite video instead of chrominance) then try a different cable. I see. * - don't know the correct English term ATM. -- SD! - http://e4aws.silverdr.com/ Message was sent through the cbm-hackers mailing listReceived on 2017-09-04 22:01:50
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