BVM-2010P RGB Output

Overheat · Post by **Overheat** » Wed Mar 02, 2016 6:39 pm

Hi folks,

I recently acquired a BVM-2010P for my retro gaming and I love the picture I'm getting - it took a lot of tweaking, but I'm happy with it.

However, the main reason I decided to go for a BVM was so that I can capture RGB output via Sync Strike / USB3HDCAP and this is where I'm running into issues.

I have a feeling I'm doing something wrong, but I'm seeking advice and the shmups forums seem to be the most knowledgeable with these things.

Currently, I am using a Scart to BNC to input my visuals from my consoles, which works fine. So, I assumed that doing the same on the output side would get me an RGB output to my Sync Strike. However, it doesn't. I'm using the R, G, B Output Decoder plugs on the back of the BVM into the BNC-Scart then a Scart cable to the Sync Strike. Does anyone know what I'm doing wrong here or how I can fix it?

Thank you in advance.

Guspaz · Post by **Guspaz** » Wed Mar 02, 2016 7:03 pm

Just to confirm, you're not using the same type of adapter to do SCART->BNC as you are for BNC->SCART, right? SCART uses different pins for input and output on some signals (including composite video, which is used for sync even when using csync).

EDIT: Example, this SCART to BNC cable is available in both output and input configurations: https://www.retrogamingcables.co.uk/son ... rter-cable

Overheat · Post by **Overheat** » Wed Mar 02, 2016 7:13 pm

Thanks for the reply. This might well be my problem. I didn't realise that the SCART cables were directional. I'll have to order a new one. Thanks for your help.

Just one more thing, the BVM doesn't appear to have a Sync output - do you know if this will be a problem?

Fudoh · Post by **Fudoh** » Wed Mar 02, 2016 7:21 pm

I'll have to order a new one.

you just need to flip one pin (20 <-> 19) - that's all.

Just one more thing, the BVM doesn't appear to have a Sync output - do you know if this will be a problem?

won't work. As long as you're using RGBs as your input, you get the same 4-part signal on the output. The newer BVM models all have a sync output. If you're doesn't it would mean that you're limited to YPbPr or RGsB signals for the loop output.

Overheat · Post by **Overheat** » Wed Mar 02, 2016 7:29 pm

Thanks for the reply Fudoh.

So are you saying that I'm going to have to get an RGsB BNC cable adapter to replace my RGBs one, and then same on the other side (but with the pin reversed) and I'll be able to get this setup working (hopefully!)

Note to self: ask on shmup forums before buying equipment in future!

Fudoh · Post by **Fudoh** » Wed Mar 02, 2016 7:35 pm

So are you saying that I'm going to have to get an RGsB BNC cable adapter to replace my RGBs one

there is no such thing. You would have to convert from RGBs to RGsB first (using an active converter), but that's not as easy as it sounds.

Do you have a picture of the back with the connections ?

Guspaz · Post by **Guspaz** » Wed Mar 02, 2016 7:38 pm

RGsB (sync-on-green) and RGBs (csync) are not just different pin arrangements, they're different signal types. One of them has sync mixed with the green signal, the other has sync on a separate pin.

I think what you should be able to do is get a sync converter box that takes RGBS as input and RGsB as output, and then run that through the BVM, such that the output of your BVM has a sync signal included. Whatever is on the other side of the BVM must support sync-on-green, or you'll need another sync converter box to split RGsB back into RGBs.

Another option would be to forget about the BVM outputs and split the signal in two, with one set going into the BVM, and another set going into something else. You'd want to do that with something powered, like an RGB distribution amp. I think Extron RGBHV distribution amps would serve this purpose, and appear to be available at a reasonable cost.

Fudoh · Post by **Fudoh** » Wed Mar 02, 2016 7:39 pm

I think what you should be able to do is get a sync converter box that takes RGBS as input and RGsB as output, and then run that through the BVM, such that the output of your BVM has a sync signal included.

the problem with that is that the converters require clean and buffered sync signals, so it's very easy to run into problems.

Guspaz · Post by **Guspaz** » Wed Mar 02, 2016 7:41 pm

Then maybe the splitter is a better option. An Extron DA2 RGBHV seems to be pretty cheap.

Overheat · Post by **Overheat** » Wed Mar 02, 2016 7:59 pm

Thanks for your replies.

I was initially avoiding using a splitter as I was worried that it could degrade the picture or introduce lag.

This is the rear of my bvm http://s401.photobucket.com/user/Grandi ... l.jpg.html

Fudoh · Post by **Fudoh** » Wed Mar 02, 2016 8:26 pm

thanks, but aren't the lower BNCs on each pairing loop outs ? In other words, all those which have terminators on them on your pic ?

Overheat · Post by **Overheat** » Wed Mar 02, 2016 8:30 pm

They don't seem to be labelled as outs. I can't really try unless I rewire my bnc -> scart.

Guspaz · Post by **Guspaz** » Wed Mar 02, 2016 8:45 pm

I think they're just ganged: some googling shows a photo of somebody feeding both H and V sync into both of the sync inputs.

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BVM-2010P RGB Output

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