Passthrough mode

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  • July 27, 2018 at 4:48 PM #22620
    Jamiehawki
    Participant

      Hi guys,

      I’m trying to use my new OSSC with a Panasonic TX-50CX680 tv and I’m having an issue with passthrough mode.

      2x works with 480i inputs but not passthrough. Tested NTSC & PAL PS2.

      480p inputs work with passthrough but not 2x. Tested PSP

      288p works 2x but not pass through. Tested PAL Megadrive.

      I’ve tried to use passthrough with PAL GC & Megadrive with high quality csync scart cables and can’t get a picture at all. Both PAL & NTSC PS2s will give a picture on passthrough mode via component but the image is split into what look like columns that overlap with each other.

      After searching on this forum someone suggested to another user that their tv may not deinterlace over digital inputs. However the manual for my tv suggests this isn’t the issue.

      I’ve also tried 3x, 4x & 5x and cannot get any picture at all with those modes, even with the tweaks suggested on the forum here.

      Any ideas for the passthrough mode or new info re 3/4/5x or am I doomed?

      Thanks

      July 28, 2018 at 9:47 AM #22625
      BuckoA51
      Keymaster

        My Samsung HDTV doesn’t seem to like 576i through passthrough, but I’ve not seen a TV that rejects 480i via passthrough as that’s a fairly common resolution.

        480p x2 not working is fairly common as this isn’t a standard resolution.

        Why would you want to pass through 288p?

        Have you tried game mode on/off for the interlace passthrough?

        July 28, 2018 at 9:57 AM #22626
        Jamiehawki
        Participant

          Hi,

          I have tried toggling game mode and it made no difference.

          I forgot to add that for the ps2s, changing the tx mode to DVI fixed the passthrough issue, but this wouldn’t work for gamecube. It also obviously removed the sound from the hdmi signal.

          What’s odd is that 480i, 576i, 240p & 288p all work fine when connected directly to the tv via scart or component.

          You’re right, I wouldn’t want to pass through 288p, I just mentioned it incase it helped someone diagnose the issue.

          July 29, 2018 at 9:33 AM #22642
          BuckoA51
          Keymaster

            Seems like you simply have a very picky TV.. 🙁

            August 6, 2018 at 6:12 PM #22707
            marqs
            Participant

              Do you have any other 480i HDMI device to test? I’ve heard a couple other reports of interlace passthru not working properly (e.g. incorrect aspect ratio with input seen as 1440px width) – I suspect some Infoframe parameter might upset certain displays but that needs more investigation.

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