Oscilloscope camera

[Chan Tran]

I saw a number of oscilloscope polaroid camera. I wonder how the camera and scope sync with each other? I can't find any info from Tektronix which I knew used to sell those cameras.

 

[DWThomas]

I don't think they do. I used a few "back in the day." In later scope technology they would be used on storage scopes where a trace was maintained on the screen for a period of time by electronic magic. The other approach was to use a slow shutter and trigger a trace while the shutter was open.

And besides, the more tries it took, the more film Polaroid sold!

 

[AgX]

There is no need for synchronisation:
the phosphorescent coating of the "screen" maintained an image during beam passes and there was complete covering of the image area (in contrast to the two-pass principle at tv-screens).

 

[DWThomas]

There is no need for synchronisation:
the phosphorescent coating of the "screen" maintained an image during beam passes and there was complete covering of the image area (in contrast to the two-pass principle at tv-screens).

Well in times of yore we were occasionally producing single events and using a triggered sweep on the scope, which can be a bit challenging depending on the specifics (I worked for an exceedingly cheap employer. ) I fondly remember doing some oscilloscope shots with my boss's late 1950s folding Polaroid, model unremembered, using a rolled up cardboard shroud and a closeup lens. A tricky mess, but with enough tries we got useful info.

 

[AgX]

Maybe you are referring to single-signal images, whereas I was thinking of periodic signals.

 

[Chan Tran]

Maybe you are referring to single-signal images, whereas I was thinking of periodic signals.

Yes with periodic signal it's simple

 

[paul ron]

when i used my techtronics camera i shot at a slow shutter so i can get a couple traces so id have a compete event recorded.