[Avid-L2] Re: BETA SP BVW-70 Head Switching in active video?

Yes I think the servo is locked to the ref when in edit mode. And an assemble isn't a hrad record. It starts off playing back locked to ref then a short insert period (clearing any old footage) and then effectively in hard record but the servo lock has to stay the same through out so the head switching is off. The picture looks right because the sync pulses recorded on the tape (now in the wromg place) force the monitor to display the picture correctly but the switching is visible.
There maybe a menu option (or even a switch) that allows the sync to follow the incoming video. That would sort it or feed the ref from a PAL signal with teh same timing delay. Ideally the AJA unit.

--- In Avid-L2@yahoogroups.com, John Moore <bigfish@...> wrote:
>
> Trying to feed the output of my record digibeta A-500 SDI into a BVW-70 through an aja sdi to component &audio deembeder.  When I'm making an assemble edit the beta sp is just a hard manual record.  The resulting betasp has head switching up about 60 lines from the bottom of the frame.  All decks and Avid are locked to house black.  If I take a second sdi ouput of the avid directly into the BetaSp decks aja converter there are no head switching problems.  Obviously there is enough processing delay going through the digibeta that the component out from the converter is out of the Beta Sp's window of tolerance.  My real question is about how the BVW-70 is handling sync with the component input.  The picture with head switching issues is not off vertically.  Does the beta deck derive it's head switching pulses based on the house sync ref?  I don't think there is any sync on any of the component signals coming in so my recollection is it's all based
> on house reference.  Just curious what those who remember FG and PG, tach pulses and head switching alignment think.  I did most of my maintenance on 3/4 not beta.
>
>
> John Moore
>
> Barking Trout Productions
>
> Studio City, CA
>
> bigfish@...
>
> [Non-text portions of this message have been removed]
>

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