Drinking the RGB cool aid too deeply?

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  • #27656
    Macross_VF1
    Participant

    So I have gotten into the RGB business for my collection of consoles and computers and I’m very much considering buying an OSSC. I have a Retrotink 2X but it’s no longer enough.

    However, I’m also into modding on my own so I need to know more about RGB signals, csync, impedance, peak-to-peak voltage, acceptable voltage levels in general and all associated terms. I don’t wish to buy an OSSC and kill it the first time I connect something to it just because I have a badly/improperly constructed mod.

    For instance, I have a Sega Master System 2 modded using the following method http://www.smspower.org/masterful/rgb.html. It works great on a CRT but would it even register on an OSSC, or even worse, would the magic blue smoke make an appearance?

    #27659
    nmalinoski
    Participant

    If that board is SCART-compliant and works with other SCART displays/devices, then it will work with the OSSC. Like with other consumer video applications, AV1 and AV2 need 1Vp-p (-.3V to +.7V) on all the video lines and sync. I believe AV3 requires the same for the video lines, but requires 5V TTL sync. Audio inputs expect line-level, so avoid feeding them amplified audio.

    #27661
    Macross_VF1
    Participant

    That does sound encouraging on the OSSC part and yet you provide me with exactly the thing I’m really talking about. 1Vp-p means something, 1 Volt peak to peak, but what does it really mean? Likewise, I’ve heard and read about 5V TTL but I don’t fully understand it. It something about either being on or off which is represented by either 0V or 5V, right? My brain is ready to learn everything there is to know about this subject! 🙂

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