[QuadList] NBC Control System

[C. Park Seward]

Back in the early days of 1" VTRs, we didn't have everything capable  
of correct SCH phase. Some sync generators, cameras, CGs and TBCs were  
not RS-170A and vectorscopes didn't have a convenient SCH phase  
indicator. Also, things drift. So the only way to insure perfect  
RS-170A coming out of the switcher was to use a Sync-Proc. Worked well.

Best,
Park

C. Park Seward
Visit us: http://www.videopark.com



On Apr 7, 2009, at 7:03 AM, Chill315 at aol.com wrote:

> I wanted to do the same thing but did not see the need in a post  
> production environment.  The most important thing to us was to  
> insure that SCH was always on the money.  That prevented shifts  
> while editing.  Also we needed to do this for the clone tapes used  
> to do dissolves to the same material.
>
> I may have misled people a little bit when I talked about the 180  
> degree shift.  This was meant to be the 180 degree difference  
> between each line of the NTSC system.  The old Fsc divided by 455 /  
> 2 gives us the change on each line.  NTSC is a great system for all  
> its drawbacks.  When you think that the engineers designed it over  
> half of a century ago and it still makes good pictures today.
>
> Chris Hill
>

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