Posted by Rick Merrill on 10/08/07 14:08

Richard Crowley wrote:
> "Rick Merrill" wrote ...
>> My concern is that the generator is not keeping very
>> good timing so the audio begins to lag over the course
>> of a couple of hours recording. AFIK there is no time
>> sync on the audio, just on the video.
>
> No equipment, even professional will hold sync over "a
> couple of hours". Or even over one hour. They is why
> we use gen-lock and timecode, etc.

Call me suspicious, but if "gen-lock" signal is off by
0.1% then after 10 hours of recording there will be a 1%
cumulative error.

It is the accuracy of the gen-lock that comes from the black-burst
generator and that's what I wanted to know.

In other words, does anyone ever check the accuracy of a genlock
signal (e.g. one that was purchased on the cheap from ebay)?

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