Tektronix Oscilloscope Probe Readout Pin. What is for?

[gmcjetpilot]

I have a Tektronix 2235A Oscilloscope that came with P6109 150KHz probes.
Tektronix probes have that ground pin at the collar of the BNC. My generic
China made X1/X10 probes that I have don't have the pin.

There is no automatic switching from X1/X10 range, the selector dial for Vert
deviation has both scales, you just look at the right scale on the knob's dial.

It seems in X10 the China probe reads less than the X10 Tektronix probes?

Any detailed info would be great.

 

[dick_freebird]

That's what the pin does, tell the 'scope that it's 10X. If the
'scope wants to know.

A 10X probe on a 1Mohm input channel would have a 9M
series resistance. Maybe the other probe is different.

I would say to start with a known DC source and DMM,
and use that as a tiebreaker. Then see what you can do
(if anything) to the probe that's wrong.