Neo Geo MV-1C video output voltage?

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HDgaming42
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Neo Geo MV-1C video output voltage?

Post by HDgaming42 »

I recently got a really cool consolized kit for Neo Geo MV1C boards that uses SNES controllers:

Image
https://www.tindie.com/products/chipnet ... herboards/

It works great, but the video seems hot. Is this similar to how dreamcast VGA seems to be overdriven?

Does anyone know the standard output voltage of a MV1C, and what it needs to be tamped down by to get it within spec? Thanks!
Ryeno
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Re: Neo Geo MV-1C video output voltage?

Post by Ryeno »

HDgaming42 wrote:I recently got a really cool consolized kit for Neo Geo MV1C boards that uses SNES controllers:

Image
https://www.tindie.com/products/chipnet ... herboards/

It works great, but the video seems hot. Is this similar to how dreamcast VGA seems to be overdriven?

Does anyone know the standard output voltage of a MV1C, and what it needs to be tamped down by to get it within spec? Thanks!
dreamcast isn't "that" overdriven. The real problem with dreamcast is the voltages not linear 0-100IRE.
beharius
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Re: Neo Geo MV-1C video output voltage?

Post by beharius »

To get the best possible video output you need our VGA16 scan-doubler or RGB16 video amplifier board. They are all optimized for the Neo Geo with impedance matching outputs.

https://www.beharbros.com/rgb16
https://www.beharbros.com/vga16-mvs
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Josh128
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Re: Neo Geo MV-1C video output voltage?

Post by Josh128 »

HDgaming42 wrote:I recently got a really cool consolized kit for Neo Geo MV1C boards that uses SNES controllers:

Image
https://www.tindie.com/products/chipnet ... herboards/

It works great, but the video seems hot. Is this similar to how dreamcast VGA seems to be overdriven?

Does anyone know the standard output voltage of a MV1C, and what it needs to be tamped down by to get it within spec? Thanks!

What do you mean the output seems hot? Whats the peak to peak voltage on a full white screen?
beharius
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Re: Neo Geo MV-1C video output voltage?

Post by beharius »

It has only 220uf caps on the RGB lines.
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HDgaming42
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Re: Neo Geo MV-1C video output voltage?

Post by HDgaming42 »

Josh128 wrote:What do you mean the output seems hot? Whats the peak to peak voltage on a full white screen?
Is there a way I could determine this without dropping $400 on an oscilloscope? (the picture isn't of mine).
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HDgaming42
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Re: Neo Geo MV-1C video output voltage?

Post by HDgaming42 »

beharius wrote:To get the best possible video output you need our VGA16 scan-doubler or RGB16 video amplifier board. They are all optimized for the Neo Geo with impedance matching outputs.

https://www.beharbros.com/rgb16
https://www.beharbros.com/vga16-mvs
The RGB16 looks very interesting. Can't wait until it's out and has some reviews!
L-Train
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Re: Neo Geo MV-1C video output voltage?

Post by L-Train »

I have 2 MV1Cs and measured the RGB output into 10K ohm loads. I got R/G/B peaks of 3.46/3.48/3.48V on one unit and 3.46/3.47/3.47V on the other. To get 0.7V a voltage divider of 7.87K/2K should do the trick.
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Josh128
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Re: Neo Geo MV-1C video output voltage?

Post by Josh128 »

Nice, thanks for the info. I believe that most if not all JAMMA arcade boards use this TTL level RGB output.
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Josh128
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Re: Neo Geo MV-1C video output voltage?

Post by Josh128 »

Nice, thanks for the info. I believe that most if not all JAMMA arcade boards use this TTL level RGB output.
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HDgaming42
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Re: Neo Geo MV-1C video output voltage?

Post by HDgaming42 »

L-Train wrote:I have 2 MV1Cs and measured the RGB output into 10K ohm loads. I got R/G/B peaks of 3.46/3.48/3.48V on one unit and 3.46/3.47/3.47V on the other. To get 0.7V a voltage divider of 7.87K/2K should do the trick.
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Thanks so much for taking the time to test this and post the results! Saves me buying an oscilloscope!
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