Quote:
Originally Posted by Espo
I'll check those signals soon. I chose to focus on the areas before the synch circuitry, because the signal does not consistently look like it does in the pictures. The signals vary in voltage and noise levels quite a bit.
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If you are feeding it a live TV signal and not a test pattern the signal will vary.
The Synch pulses should have a constant tallness and never be swamped by noise...Changes in areas of the signal other than the synch pulse typically are not noise (unless your screen gets snowy with signal sometimes) but rather changes in video content. If you want to make sure the signal and the circuits amplifying it are stable feed the set a test pattern from a test pattern generator or feed it signal from a DVD player that is paused on a frame that gives a nice waveform.