[Avid-L2] Re: BETA SP BVW-70 Head Switching in active video? Now Auto vs Ext Ref Switch

So everyone was correct there is sync on the Y channel coming out of the Black Magic mini SDI to component and audio deembedder. This explains why the tape had a proper vertical reference. The deck was set to external sync not auto. The switch is located on the back of the machine by the Ref input. When coming straight out of the Avid the signal was within the window of tolerance for input. Coming out of the record digibeta the SDI output was delayed too much by processing time etc... to input correctly with the BVW-70 set to ext. Switching it to auto allows both signal paths to work. Clearly when set to external something related to the head switching pulses is derived from the ext sync input not the incoming video.

--- In Avid-L2@yahoogroups.com, Dennis Degan <DennyD1@...> wrote:
>
>
> On Oct 23, 2009, at 12:40 AM, John Moore wrote:
>
> > 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.
>
> I offer:
>
> It's been a really long time since I've dealt with this but as I
> recall, there is sync on luminance when you use the component input.
> Is the AJA converter producing sync on luminance? Check for that.
> There should be no visible head switching when using the component
> input. Your Beta SP deck should be set to either "Automatic Sync Ref"
> or "Input Ref" (preferably "Auto"). It should NOT be set to house sync
> ref (labeled as "Ext Ref" I believe). The sync reference should come
> from the input video ANY time you are recording, whether it be hard
> record or insert/assemble. This is set with a switch, which as I
> faintly remember, is found under the control panel. If it's not there,
> it's in a menu. However, if you're seeing the vertical interval in the
> picture while recording, this is an indication that the system's output
> sync reference is different from the input video's timing. It will
> look that way only while you are recording. Once you play it back
> normally, it will look correct and there will be nothing wrong with the
> recording.
>
> Dennis Degan, Video Editor-Consultant-Knowledge Bank
> NBC Today Show, New York
>

------------------------------------

Search the offical complete Avid-L archives at:

http://archives.bengrosser.com/avid/

Avid L2, Where the Answers are.Yahoo! Groups Links

<*> To visit your group on the web, go to:
http://groups.yahoo.com/group/Avid-L2/

<*> Your email settings:
Individual Email | Traditional

<*> To change settings online go to:
http://groups.yahoo.com/group/Avid-L2/join
(Yahoo! ID required)

<*> To change settings via email:
mailto:Avid-L2-digest@yahoogroups.com
mailto:Avid-L2-fullfeatured@yahoogroups.com

<*> To unsubscribe from this group, send an email to:
Avid-L2-unsubscribe@yahoogroups.com

<*> Your use of Yahoo! Groups is subject to:
http://docs.yahoo.com/info/terms/