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BetaCam SP Deck IssuePosted by Jay Brown
Professional video decks need a reference signal. Also called house clock, also called black burst. It syncs the internal clock of the deck to all the other machines it may be talking to. If it doesn't have to talk to any other true video machine, it still needs a clock to reference for sync.
Google it, read up on it. If you're going to be using a professional level deck, there are some very basic video engineering things you should understand. You can buy a generator from bhphotovideo.com Horita is one manufacturer that comes to mind.
[zone.ni.com]
"A composite color video signal that consists of vertical and horizontal sync signals, and chroma burst. Black burst is used to synchronize (genlock) other video sources to the same sync and color information. A master black burst generator normally distributes master synchronization signals to an entire video production facility so that all equipment at that location is synchronized." Look for one on B&H Photo (www.bhphoto.com) or e-bay...or google it for other options.
if you have a Sony 1800 deck - there's a menu option, I think, to turn the no ref alarm off - it's likely your monitor will have a roll in it when you record with no reference signal (picture output not in sync - roll or sync bar stuck somewhere in the middle of the screen) Ignore that - just record - it will play back fine.
Andy
I do have an 1800, and I turned the alarm off like you said and things are beautiful, besides these bloody ice storms up here in Northern Michigan. Trees are snapping off all over. I'm here in my studio now unplugging all of my gear. Nasty electrical storms. Wow!
You boys in Cali sure have it rough. Thanks for all your help! -Jay
Most machines default to paying attention to the incoming signal when they record. That way, they can make a good recording whether or not the incoming video is "locked" to the house.
This gives you the ability to record a satellite feed where the camera could be half-way around the world. Playback, however, is a different story. You can play back using the deck's internal generator (usually the deafult), play back the picture locked to the house or other black burst generator, or play back locked to incoming video. Playback locked to incoming video is dangerous. If somebody turns the camera or video signal off while you're playing back, you will get one or more bad playback frames. Nobody uses this lock. Playback locked to internal is OK, but as you noticed, the "STOP" button usually flashes and there will sometimes be messages displayed. The deck internal generator is cheap and not terribly stable, but usually OK. Lock to External House, Color Black, or Black Burst (usually all the same thing) is the way to go. Black Burst is or Color Black is a video signal with a black picture. That's pretty much it. You can get an emergency Black Burst by powering the camera and leave the lens cap on (Some cameras won't stay that way for a long time). Locking to it means the picture from the deck is made to align itself (top, bottom, left, right) to the black picture. Many people make small black burst generators that are perfectly up to the job, but if you're a small enough shop, Internal is probably all you need. It's usually really handy to lock all your machines while you're Computer/Tape Editing. That's one place where having all the machines locked to the same video reference is a grand idea. This gets more and more important as the cost of the machine goes up. The big Flames and Infernos won't run without House Black. Koz
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