Den Mon, 4 Sep 2017 23:55:36 +0200 skrev firstname.lastname@example.org: > > > 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 Should this be counted as a simple phase inversion (haven't looked into the schematics of the modulator today) or a delay of about one half wave? One half wave could probably match the incorrect timing I see on my CRT. > - 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. How does it compare to a reference signal though? -- (\_/) Copy the bunny to your mails to help (O.o) him achieve world domination. (> <) Come join the dark side. /_|_\ We have cookies. Message was sent through the cbm-hackers mailing listReceived on 2017-09-06 13:03:06
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