Re: TC = GL?

I would be very careful when feeding TC to a camera without feeding genlock
at the same time. Timecode is a time division (divided into frames and
subframes), and it is vitally important that the machine receiving and
recording external timecode be able to resolve to the same time reference
(genlock for video systems, wordclock for audio). Subsequent playback of the
recorded tape can be difficult if there was a clock variation as the LTC
tracking and video tracking will output contradicting info.

If you need to do such a setup, arrange to have a master clock device
feeding both the TC generating audio system and the video. The Rosendahl
nanosync for example is capable of generating both Blackburst signals for
Genlock and Wordclock for the audio.

Otherwise you need to look at the Ambient Lockit systems that can generate
tri-level sync for more recent HD/Digibeta cameras.

I hope this helps.

Steven




"Richard Crowley" <richard.7.crowley@xxxxxxxxx> a écrit dans le message de
news: dcbfh3$72a$1@xxxxxxxxxxxxxxxxxxx
> We have been having a discussion over on news:rec.audio.pro about
> feeding SMPTE TC (from a MOTU 828MKII audio interface box)
> into a camera (unspecified), and what benefit/effect it would have.
>
> A specific side-question is the effect of feeding a camera SMPTE TC
> without otherwise synchronizing (via Genlock, etc) it. Do any
> cameras actually "genlock" (at least vertical sync) to incoming TC?
>
> Is this question discussed in one of Wolf's books? Or is it too silly?
>


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