Quantcast How to connect betacam sp to rca phono plug - digitalFAQ Forum
  #1  
06-12-2019, 12:09 PM
trolltuning trolltuning is offline
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I need to hook up a Betacam SP to my capture box whih is an ADS 100 whose input takes RCA phono plugs . How do I get from the Betamax video outputs BM? ? to the RCA plug. Do I understand the capture thread correcty that I only need to use one of these outputs? What cord or connector box will get me from one to the other?
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  #2  
06-12-2019, 12:30 PM
hodgey hodgey is offline
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Not sure what the ADS 100 is, or what deck you have. You will at least need BNC -> RCA adaptors, which can be found online. Ideally you want to use component outputs for betacam, which is 3 BNC or RCA cables + audio. If you have a digital betacam deck, it may be possible to use a digital SDI output (also BNC) instead.
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  #3  
06-12-2019, 12:38 PM
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jwillis84 jwillis84 is offline
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Pyro ADS 100 "I think" it was a DV capture box over USB.. I used to have one long ago. Or it could be a ADVC-100 with a typo.
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06-12-2019, 12:43 PM
trolltuning trolltuning is offline
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Thanks. Only thing I'm still wondering is this- the converter box only takes a 2 video inputs. I assume that means that I use a Y connecter for 2 of the outputs and turn the 3rd one down to 50%?
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06-12-2019, 02:44 PM
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jwillis84 jwillis84 is offline
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Again (I think) your referring to Studio level audio outputs from the Betacam SP.. possibly XLR outputs?

If so those are at something really high voltage wise and would "burn out" or seriously stress any conumer "level" capture equipment. I just went the opposite direction from consumer to Studio levels and needed a "driver" that converted RCA to XLR connectors, my case "Stepped Up" the voltage levels. I used a "Rolls MB15b" from BHPhoto.. not cheap.. but not super expensive.

That same device "Rolls MB15b" is a (dual-direction) Step UP and Step DOWN converter with Inputs and Outputs for both directions.. so I guess I got my moneys worth. Not all "drivers" go both directions.. but this one did.

The MB15b gets 5/5 stars from 25 reviewers on BHPhoto. The initial pic only shows the RCA connectors but it has XLR connectors on the side turned away in the first pic, later pics show the backside.

Clarify if you are talking about audio or video signals.. it does make a difference. If you are really talking video (I am confused) but if you are really talking audio.. then what your asking about makes sense.

Last edited by jwillis84; 06-12-2019 at 03:32 PM.
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  #6  
06-12-2019, 02:54 PM
trolltuning trolltuning is offline
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I am talking about the 3 composite (BNC) outputs.
I'm not too worried about the audio as it is more common to step XLR down to 1/4 in ch jack and then to RCA phono plugs.I'm guessing I may have to either turn that way down or add resistance.
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  #7  
06-12-2019, 03:35 PM
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jwillis84 jwillis84 is offline
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Ahh..

I probably can't help you then. Betacam came in a couple cartridge formats and people would probably need the brand and model of your VTR. Most were SONY but I think Panasonic made one.. and the rules for converting Studio to Consumer for video.. or best practice guidance is outside my experience.

Good luck
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  #8  
06-12-2019, 03:39 PM
latreche34 latreche34 is offline
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If your deck has an SDI output use it with an SDI/USB.3 grabber, That way the deck does the conversion to digital for you and you don't have to worry about audio because it will be embedded in the SDI stream. Much better than fiddling with analog connections and adapters, such as analog BNC and XLR audio, Plus the quality would look much better.
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  #9  
06-12-2019, 03:47 PM
hodgey hodgey is offline
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What capture device and VCR are you using? Could you maybe give us a picture?

Betacam is a bit unique among analog video tape formats in that the video is stored in component form, i.e brightness and 2 separate colour channels (R-Y and G-Y) all with (I think) the same bandwidth. Most other formats, like e.g VHS, Beta, Video8, U-matic etc which havesomewhat detailed brightness signal and much lower detailed colour signal tucked under.

So ideally, you want to capture from the component outputs (e.g 3 BNC outputs) to a capture device that has component BNC or RCA inputs. I believe the signal is slightly different from the normal consumer component output from e.g a DVD player, so the capture device shold be compatible with that.

If that's not possible, the next option is S-Video. The betacam player we got here has normal s-video connectors, though some professional equipment use two BNC connectors typically labeled Y/C instead. I don't know how it will affect the quality.

One could also capture from the single composite output with a BNC to RCA adapter, though that would definitely degrade the video quality.

If it's a digital betacam deck, it will have a digital SDI output BNC connector which would let the player digitize the video and can be captured with a device that can ingest SDI signals.
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  #10  
06-12-2019, 08:21 PM
trolltuning trolltuning is offline
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The one I plan to get Saturday is a Sony UVW 1400 a.

I ordered a used one shipped to me but it didn't work. I found some one local with a working one they will sell and the BNC cords. I was expecting to use the Instant DVD converter from ADS Technologies that I own. It does have an S video input as well as the RCA phono plug.
The non-working one is an Ampex and has 6 component outputs set 1 is comp non comp super. set 2 is Y, R-Y, B-Y
and there is also a 12 pin female connecter labelled DUB/COMPONENT 1
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  #11  
06-12-2019, 10:25 PM
latreche34 latreche34 is offline
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You should have looked for the Sony J-3 SDI or J-30 SDI those two players play every SD betacam format small and large cassettes, And can be had for cheap. The formats they play are: Betacam, Betacam SP, Digital Betacam, Betacam SX and Betacam Mpeg IMX in both sizes.
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  #12  
06-13-2019, 07:56 AM
hodgey hodgey is offline
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If that's what VCRyou intend to use, S-video would be the best option since your capture card doesn't have component video input. I haven't done any betacam capture myself, so I can't say whether there is any significant difference between component and composite.
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  #13  
06-13-2019, 12:15 PM
latreche34 latreche34 is offline
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Source Wikipedia:
"Betacam is an analog component video format, storing the luminance "Y" in one track and the chrominance on another as alternating segments of the R-Y and B-Y components performing Compressed Time Division Multiplex or CTDM. This splitting of channels allows true broadcast quality recording with 300 lines of horizontal luminance resolution and 120 lines chrominance resolution (versus ≈30 for Betamax/VHS), on a relatively inexpensive cassette based format"

So it depends on how the deck is converting to S-Video, is it downconverting the chroma to 30 lines? Who knows. But using a SDI deck guarantees that the full analog chroma/luma bandwith is converted to digital with no loss.
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  #14  
06-13-2019, 12:43 PM
NJRoadfan NJRoadfan is offline
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S-Video shouldn't reduce the chroma resolution from Betacam sources. I'd be more concerned about the capture card setup.
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  #15  
06-13-2019, 02:53 PM
latreche34 latreche34 is offline
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S-Video chroma bandwidth is limited compared to Y/Pb/Pr, Here is a quote from wiki:
"Compared with component video, which carries the identical luminance signal but separates the color-difference signals into Cb/Pb and Cr/Pr, the color resolution of S-Video is limited by the modulation on a subcarrier frequency of 3.57 to 4.43 megahertz, depending on the standard."
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  #16  
06-16-2019, 01:17 PM
cbehr91 cbehr91 is offline
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Didn't most Betacam decks have XLR inputs and outputs for audio? I'm sure there exists XLR-to-RCA adapters with the correct genders for your needs.
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