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What's wrong with my Electrophysics Micronviewer?

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Bill W:

--- Quote from: Ben321 on July 17, 2021, 10:19:25 pm --- Do most vidicon era cameras expect to have a smoothing capacitor in parallel with the load, either at the camera end or load end of the coaxial cable?

--- End quote ---

No.  A capacitor that could smooth out that noise would also kill the syncs.


--- Quote from: Ben321 on July 17, 2021, 10:19:25 pm ---
I have no idea what the sync signal source is for an Electrophysics Micronviewer. There's a couple ways the level could be an issue. If the level is too high, the capture dongle might intentionally reject the signal due to it thinking it's not a valid video signal. Also since using pulses of too high of a level (though usually outside of the picture area, unlike from my camera where they are inside the picture area) is a technique used by Macrovision for copyprotection, and since modern consumer video capture equipment is required by copyright law to respect copyprotection signals, it could be mistakenly seeing the out-of-spec image signal levels as being copyprotection signals, and thus refusing to capture the signal.

--- End quote ---

As I said, level is unlikely to be an issue.  NTSC chroma can hit 1.4V after all.  Junk where Macrovison or similar are coded might be possible:
https://forum.videohelp.com/threads/170667-What-Macrovision-looks-like



--- Quote from: Ben321 on July 17, 2021, 10:19:25 pm ---As for the difference between RS-170 and NTSC, the fact is that NTSC was actually developed to be compatible with RS-170 (using 59.94Hz field rate instead of 60Hz field rate) so that NTSC color video would still be viewable on older monochrome TV sets. So even a strict NTSC video capture device should not be so strict as to block RS-170 monochrome signals. If it's that strict, that seems like a defect in the capture device, or possibly that the camera itself is outputting a signal that as well out of spec for either NTSC or RS-170.

--- End quote ---

The CD22402 is WAY out of spec for RS-170 or NTSC.  4.0us syncs for a start.  However RS-170 kit was never that fussy (and maybe also had a CD22402 inside).

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