Retro Gaming Cables Jaguar Csync

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  • #22416
    Steo
    Participant

    I’m hearing some controversy about the Jaguar CSYNC cables being sold by Retro Gaming Cables. I have one of them I got a few months back and I hear there’s no resistor on the Csync line. After unscrewing the end of the cable, the trace has no components and just goes right to Csync. My multimeter between GND and CSYNC measures 4.5v. Is this bad and will it harm my OSSC?

    #22419
    eric90000
    Participant

    Yeah that’s TTL level csync going into the OSSC, which is bad. Over time it could reduce the life span of various components in the OSSC.

    You’ll need to look up the updated spec and modify the cable to include the appropriate resistor/capacitor…a lot of the time its around a 470Ohm resistor and a 220uF 16V cap in series on the sync line in the SCART head.

    You could always email Rob in RetroGamingCables and ask him to fix it/replace it?

    #22421
    nmalinoski
    Participant

    Just chipping in: The OSSC will take TTL sync, but only on AV3.

    #22424
    Steo
    Participant

    Thanks for the replies. Rob got back to me and told me I can send it back if I want and they’ll do it, but then I told him I can just add the components myself to save hassle if it’s just a cap and resistor. He said a 680Ohm resistor and a 220uF cap. He then said if I don’t have those he can send me them, that’s nice of him.

    The closest I can get is 470+220Ohm in series to make 690Ohm but I can’t actually find my capacitors I had so I might just be best off getting him to send them and waiting.

    #22426
    marqs
    Participant

    You should also measure CSYNC level into 75ohm termination. Even though that likely drops voltage into safe level for AV1/2 (<2Vpp), it's still a good idea to add series resistor to get certain 0.3-1Vpp level.

    #22428
    Steo
    Participant

    I added the 2 resistors to make 690ohm and a 16V 220uF cap I found in series as a test then tried it on my CRT TV again. The last time I tried the Jag on my CRT the colours were really messed up. It had a really yellow tint, very dark image and just really messed up colours in general, but then it looked OK with the OSSC. The TTL CSYNC explains it all now and it looks absolutely perfect on the CRT too. Really bright and perfect colours.

    How do I go about testing CSYNC to 75ohm termination? Sorry if that’s a stupid question but I’m not entirely sure which points to test for it.

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