Extron VSC 500/700 screen tearing

[Gunstar]

I've been wanting to pick up a VSC unit for 480i output (not sure if the OSSC Pro will get similar flicker settings) but have seen a few reports of screen tearing online and I was wondering why some people don't have this issue and some do, is it the case of using a particular firmware perhaps?

[orange808]

There's no frame lock. With a proper scan converter that only outputs standard NTSC or PAL, frame rate conversion is necessary. I don't recall getting any tearing, but it's certainly possible. I only see dropped and repeated frames. The pacing will rarely be perfectly smooth, because there's no frame lock.

AFAIK, the firmware on the Extron scan converters isn't upgradable.

I suppose we could ask marqs for interlaced output modes with frame lock on the OSSC Pro, but it might have limited compatibility with a few consumer CRTs.

[Dochartaigh]

AFAIK, the firmware on the Extron scan converters isn't upgradable.

There's an Extron DVD (two of them actually - my buddy gave me another to upload as well) I uploaded to Archive.org which has "Extron VSC 700 - Firmware - VSC500700FW_v4x03.exe" on it - so I assume it's upgradable (or at least able to put the same/stock firmware on it, if it has some issues or something).

[Gunstar]

There's no frame lock. With a proper scan converter that only outputs standard NTSC or PAL, frame rate conversion is necessary. I don't recall getting any tearing, but it's certainly possible. I only see dropped and repeated frames. The pacing will rarely be perfectly smooth, because there's no frame lock.

AFAIK, the firmware on the Extron scan converters isn't upgradable.

I suppose we could ask marqs for interlaced output modes with frame lock on the OSSC Pro, but it might have limited compatibility with a few consumer CRTs.

Thank you for that explanation. No frame lock would explain it, so input would need to match 59.94 to avoid tearing. I'll probably grab a VSC and wait to see how OSSC Pro matures on the 480i output side of things. Appreciate it.

@Dochartaigh Good to know!