Attempting to use OSSC on SD CRT TV. Has scrolling issue.

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  • August 27, 2021 at 4:05 PM #48965
    Paranoid_Andy
    Participant

      I’m curious to see how the OSSC looks on my JVC I’Art SD CRT and to use some of its advanced features with it.

      I can mostly get it working, the picture shows up but the screen scrolls vertically rapidly and I’m not sure how to get it to stay put.

      My setup is: NES, SNES, Genesis etc. RGB consoles with scart cables -> OSSC -> HD Fury 2(HDMI to VGA adapter) -> VGA to Component plug on HD Fury -> TV

      Any ideas?

      Thank you in advance for any help!

      August 27, 2021 at 6:21 PM #48967
      BuckoA51
      Keymaster

        Are you sure your CRT supports progressive scan?

        August 27, 2021 at 8:54 PM #48969
        Paranoid_Andy
        Participant

          Hey Bucko,

          As far as I know it should, if I understand how progressive scan works that is.

          I normally use a scart to component converter and play that way without issue, but I was exploring options to make the black horizontal bars”scanlines” thicker as that is my end goal.

          I was gonna link a page with the specs but couldn’t find any. It’s an AV-27WF35.

          Hope you’re doing well man! Always nice to see you around.

          *Edit*
          I did find the manual online. It seems to indicate it won’t accept a 31KHz signal but I was thinking maybe that was for a 480p signal, not 240p. I should mention too, the TV picks up ‘passthrough’ mode and ‘line2x’. I was thinking the OSSC outputs 15KHz in passthrough mode, but maybe I’m wrong about that?

          August 29, 2021 at 9:58 AM #49005
          BuckoA51
          Keymaster

            480p is always 31khz, 240p and 480i is always 15khz

            In passthrough mode the OSSC outputs whatever is input, so if you are feeding it a 15khz signal that’s what comes out. I can confirm the HD Fury Nano and HDFURY X3 both pass through 240p OK so I don’t see why the 2 wouldn’t.

            You can’t really do anything useful to a 240p image that’s just passed through, it’s more for people who want to use OSSC on multisync monitors, or purely as a transcoder, and probably won’t do anything useful for someone using a 15khz only set.

            August 29, 2021 at 12:53 PM #49010
            Paranoid_Andy
            Participant

              Ah okay. I was hoping to try out the scanlines a bit. I’ll have to look into other options.

              Thanks for the info Bucko!

              August 29, 2021 at 1:17 PM #49011
              BuckoA51
              Keymaster

                You should already have scanlines on a CRT connecting the consoles directly.

                August 29, 2021 at 6:10 PM #49017
                Paranoid_Andy
                Participant

                  Oh I definitely do! I just wanted to make the black lines bigger 😛

                  August 29, 2021 at 7:41 PM #49020
                  Fed
                  Participant

                    Then you need a CRT with a higher « resolution » tube. 😉

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