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Re: 465B - square wave trace shows horozontal line across top of pulses, but not bottom


 

Did you try adjusting trigger levels?

--
Prof. Thomas H. Lee
Allen Ctr., Rm. 205
420 Via Palou Mall
Stanford University
Stanford, CA 94305-4070

On 2/14/2024 12:43 PM, kevin.thome@... wrote:
Hello,

This is my first post here.

I have a 465B that displays something strange when I probe the test calibrator. The top pulses are connected with a weaker horizontal line in between the actual top horizontal line of the pulses, but that does not happen on the bottom. If I flip the slope switch on the trigger, then that inverts to having the continuous horizontal line on the bottom instead, but not the top. It seems to happen when I probe the calibrator on my other scope with my 465B as well.
It also happens with two different probes, a P6105 and one of those cheapo "TP6100"s.

I am wondering if anyone might have any thoughts on what may be the cause of that? Or could it be user error of some sort? I am just getting back into electornics as a hobby so I am quite rusty.

A photo of the issue can be found here:
/g/TekScopes/album?id=293027


Thank you for your time and consideration,

-Kevin



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