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I have never had the 4-channel adaptor in my hands. When Sony upgraded the original Betacam format that had only 2 audio channels, they changed the tape formulation, used a slightly higher frequency on the video modulator to get better resolution, and added channels 3 and 4 on all cameras, so you could record 4 independent channels or repeat channels 1 and 2 on 3 and 4. CH3/4 are of much higher quality than longitudinal 1/2, but 1) being AFM channels recorded with the video, you can not edit them independently of each other, nor of the video, and 2) while the deck is in search mode or dynamic tracking (slo-and fast-play) you can not hear CH3/4. So many field crews used the 3/4 channels by connecting mics only to CH1/2, and by flipping a switch the deck recorded the same audio on 3/4. Later, editors could use the higher quality audio for editing, but the longitudinal channels for cueing the tape.
All BVW-series decks could rec-play the 4 channels when using SP tape (with normal Betacam tape only CH1/2 remain active), but in the 90īs came the PVW Pro-series decks like your 2800. They were somewhat simplified to lower the prices without sacrifying too much quality. For example, they can play back any older Betacam tape, but not record/edit/dub on it. Also the channels 3/4 went away, unless you used the adaptor that came with your VTR. And the direct dub (CTDM) connection on the BVW-decks was not present in the PVW-series. Instead, you got S-video I/O.
And XDCAM is right. Nothing surpasses a 75. Rugged, fast, precise, with A/V confidence playback, everything you can ask for.
Last edited by RJMiranda; 06-12-2015 at 04:14 PM.
Reason: Typos
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