开云体育

I finally got a service manual for the 2465A and I've tried to adjust the jutter issue to it's minimum as per the manual. It's not perfect but it is a little better now than it was before.

I'm really puzzled though.

If I bought a car which had a control for adjusting engine malfunctions I think it would be a lousy design as if the engineers couldn't get the design right. So they deliberately had to make some kind of variable compensator.

Why did Tektronix deliberately make this scope with a jitter adjustment when it might has been better to design the scope so no jitter ever occurs as with their enormous experience with previous scopes?

It seems strange to find a factory adjustment to the effect like "Adjust this control to keep the pistons from exiting your engine" in your car's owners manual. Pretty silly when a rev limiter can do this more effectively.

73s

geo, every design involves choices and trade-offs. Modern autos have more and more bugs and trade-offs, notice all the recalls.

Since 1970s 7000 scopes TEK multiplexes the CRT characters with the scope plugins traces.
A continous static readout could caude CRT phosphor burnin.
The CRT readouts jitter depends on the sweep rate and other factors, so the readout display position is slightly dithered. In 7000 and 246xB series scopes there is a jitter control for the CRT character generator.
After adjustment I have never noticed slight jitter in either 7104, 7904, 246xB.

Suggest you read the service manual section readout for details.

Bon courage

Jon