Is readout compatible between scope manufacturers?

[alank2]

I see a lot of probes with a "readout" pin on them to set the 10X, etc.  Did they just choose a resistance that was 10X for example?

Is this compatible between scopes (tek, hp, rigol, etc.)?

[alex.forencich]

I see a lot of probes with a "readout" pin on them to set the 10X, etc.  Did they just choose a resistance that was 10X for example?

Is this compatible between scopes (tek, hp, rigol, etc.)?

Yeah, there are standard values for the readout pin resistor.  All 10X probes should have the same resistor value, for example.  I think it is 10 or 11k. 

[David Hess]

At least for the standard x10, x100, and x1000 values I think they are all the same.  Some of the later values which were introduced might have varied between manufacturers.

As far as I know, the original standard came from Barry Gilbert when he designed the readout for the Tektronix 7000 series where the probe readout resistance directly alters the 1 of 10 encoded current into the analog readout generator.  It is possible to go though his design to calculate what the resistor values should be.