Units with different refresh rates

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  • #20987
    RetroWorldSeries
    Participant

    I have several OSSC’s, all 1.6. My first I got off eBay and the rest from here.

    I’ve connected my current OSSC to an n64 with Mario kart 64 and scart with luma. I’m getting some inconsistent results with the ones purchased from VGP when connecting to my capture card. Some will match the rates of my original and I get a signal. Others have a slightly different signal and so I don’t get a picture.

    I’m using default settings for all.

    [IMG]http://i68.tinypic.com/wugcow.jpg[/IMG]
    [IMG]http://i63.tinypic.com/2cmq52r.jpg[/IMG]
    [IMG]http://i66.tinypic.com/axi9aa.jpg[/IMG]

    #20988
    RetroWorldSeries
    Participant

    #20989
    RetroWorldSeries
    Participant


    #21001
    BuckoA51
    Keymaster

    did you try to power cycle the N64 a couple times to force OSSC to re-lock on to the signal?

    #21019
    RetroWorldSeries
    Participant

    Yes. On the OSD it would show the same refresh rates as the working ones, but I wouldnt get a signal to my capture card. I think cycled through the all the inputs and back to it, and it would show the odd refresh rate

    #21024
    BuckoA51
    Keymaster

    Do you get an image on your monitor? Do you get a consistent reading with other sources?

    #21027
    RetroWorldSeries
    Participant

    It does work with the monitor. I tried it with the Super Famicom and got similar results. Maybe the capture card is just too sensitive to rate changes? I just think its odd that this single unit doesn’t share the same rates with the other 5 units i have.

    #21033
    BuckoA51
    Keymaster

    Yeah it’s very odd for sure. Try something like a Genesis, that doesn’t have the weird jitter problem the SNES has?

    #21041
    marqs
    Participant

    The refresh rate shown on the screen is indicated by the digiziter chip and is not always fully accurate. Upcoming firmware has an option to display FPGA-calculated rate which is more accurate and should be uniform (within oscillator tolerance) across units. Even if the displayed rate slightly differs, the output rate should still be same regardless of unit when using one physical console. As for why one (or is there several?) does not work with the capture card, I’m guessing it might be due to variance in those digitizer chips. I’d try tweaking sync Vth and hsync tolerance options to see if they make any difference.

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