Electronics > Beginners
I can’t compensate my probe
james_s:
Does the compensation adjustment do anything? It should have a very noticeable effect on the edges of a square wave, even if it is completely wrong for the scope.
SteveRosenlund:
--- Quote from: james_s on October 20, 2018, 04:46:13 am ---Does the compensation adjustment do anything? It should have a very noticeable effect on the edges of a square wave, even if it is completely wrong for the scope.
--- End quote ---
Yes. It goes from the image I posted to an even droopier left edge.
SteveRosenlund:
Ok I figured out how to get images here from my phone using imgur.
This photo shows the best compensation I can achieve on my p6137 probe.
This one shows the probe box with the additional adjustment ports opened up after my fiddling with things. No change.
This photo shows the same probe on channel 2. No change.
This photo shows the same probe on another scope.
And this photo shows the same p6137 probe on the other scope but with the compensation screw turned all the way the other direction. In case you thought i didn't know how to compensate a probe.
Here are a couple photos of different probes on my 2465B that compensate just fine.
David Hess:
The other adjustments are for high frequency transient response and will have no visible effect on the relatively low frequency source used for the compensation adjustment. Adjusting them requires something like a tunnel diode pulser.
rf+tech:
Steve,
Remove the probe tip hybrid. According to https://www.tek.com/accessories/oscilloscope-probes/replacement-parts, the tip hybrid should should have a black tip and natural tail insulator color. Also, measure the cable length to ensure it is 1.5 meters.
Based on prior experience, there is a strong possibility someone has interchanged parts. The sum of the current components may no longer be as Tektronix originally shipped, creating this compensation problem.
RF+ Tech
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