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Forums Broadcasting Ye Olde TBC Sony BVT810 V Phase

  • Ye Olde TBC Sony BVT810 V Phase

     Tom Matthies updated 4 years, 8 months ago 5 Members · 12 Posts
  • Jorgo Kusters

    August 24, 2009 at 6:50 pm

    I have recently aquired an old Timebase corrector. The Sony BVT-810, used to be for U-Matic tapes.
    It is giving me problems with the V-Phase. It has an indicator LED which is either red or green. Ofcourse I want it to be green.
    The V-Phase button on board4 does not seem to be responding.
    And I do think I hooked it up correctly:
    1 Input via BNC from VHS player
    2 Output1 to monitor
    3 Output2 to computer
    4 Output3 to ref video in

    Still the imahe is shifted down with a lot of black/white info in the top…

    I also tried a kramer blackburst generator on ref-video without succes.

    Does anyone have any suggestions?

    Many Thanks!

    Kind Regards,

  • Steven Bradford

    August 24, 2009 at 11:57 pm

    I believe this is your problem:

    Output3 to ref video in

    The TBC output should not go to the ref video in on hte deck.

    Looking up a picture of the 810 I found on line, what you probably need to do is send a black signal to the ref in on the deck, and to the refernence composite video in on the 810. You could get this from a camera and loop it through the 810 Ref in/out to the deck.

    That’s my guess from memory.

    Steven Bradford 3D company I’ve worked with since 1990 my personal home page, find my greenscreen page there. the school I teach at.

  • Tom Matthies

    August 25, 2009 at 1:22 am

    Also looking at t picture of the TBC on line. You want to feed a reference signal to the REF. input on the TBC. If you don’t loop it, you need to terminate it. Then take the advanced sync (ADV SYNC) from the TBC and hook that up to the sync/reference input of your deck. Hopefully you are using a broadcast deck with this input. Make sure the deck is set to external or “TBC” reference if equipped.If tour deck will accept it, also hook the subcarrier output (SC OUTPUT)from the TBC to the deck as well. Then take the composite video from your deck and hook it to the off Tape Video input of the TBC. If your deck is so equipped, feed the dropout compensator signal (DOC RF) into the TBC as well. That should be about it. If you are using a consumer type deck without the various inputs, you might want to try using a full frame TBC or Frame Synchronizer instead of your TBC. You won’t have control over the vertical phase otherwise.

    Life moves pretty fast. If you don’t stop and look around once in a while, you could miss it.–Ferris Bueller

  • Bob Zelin

    August 25, 2009 at 5:19 am

    Tom is very correct. The BVT800 and BVT810 were specifically designed for the Sony BVU800 and BVU820 3/4″ U-Matic VTR’s. These are NOT FRAME SYNCHRONIZERS, so if you are trying to lock up a VHS machine to go into a modern digital card (like an AJA, Blackmagic or Matrox), it won’t work.

    If you are using a 3/4″ VTR (like a sony BVU800 or even a Sony VO-5850), you genlock the Ref Video input of the TBC to your system (your AJA, Blackmagic, AVID, etc.) with a black gen. Then you take the Adv Sync, and go to the Ext Sync input of the 3/4″ VTR. Take the SC out and go to the EXT SC on the 3/4″ VTR. And as Tom said, take the DOC out, and go into the DOC IN (or RF in) of the 3/4″ VTR. You will also see a big silver multi pin connector that you don’t have the cable for. This was for the BVU-820 3/4″ VTR that did slo mo, and was required for the BVU820 and BVT810 to work together.

    The vintage of this product is about 1983 or 1984. God, I am old.

    Bob Zelin

  • Tom Matthies

    August 25, 2009 at 4:18 pm


    Life moves pretty fast. If you don’t stop and look around once in a while, you could miss it.–Ferris Bueller

  • Tom Matthies

    August 25, 2009 at 4:19 pm

    Even the phrase “ditto” is ancient and no one even knows what it refers to anymore.

    Life moves pretty fast. If you don’t stop and look around once in a while, you could miss it.–Ferris Bueller

  • Jorgo Kusters

    August 25, 2009 at 5:51 pm

    Thanks everyone,
    I was indeed trying to connect a classic consumer VHS to the TBC.

    So… anyone in the market for a vintage BVT810 🙂

    Thanks again

  • Jorgo Kusters

    August 30, 2009 at 12:13 pm

    One more thought…
    Since I have a working TBC, would it be possible if I can get my hands on a “vintage” U-matic recorder, to loop the VHS through the U-matic and then record the corrected signal?

    I have a small budget and full frame TBC’s are still rather expensive (would love a For-A).

    Kind Regards

    Kind Regards,

  • Bob Zelin

    August 30, 2009 at 10:24 pm

    you can buy used DataVideo TBC-1000 on ebay for $189. You can buy lots of stuff cheap on ebay. A TBC is a time base corrector – it is not a frame synchronizer. If you dont’ get a frame sync, you cannot accomplish what you want to do. There is no “work around”.

    Bob Zelin

  • Jorgo Kusters

    August 31, 2009 at 6:38 pm

    Thanks Bob,
    back to ebay it is

    Kind Regards,

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