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Micsig CP1003/CP503 100MHz/50MHz Current Probe

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EEVblog:

--- Quote from: Hydron on November 19, 2022, 06:09:14 pm ---Dave, a quick and dirty way of measuring them would be to break out a sig-gen output via a loop section big enough to clamp around, then terminate it with 50R and derive the reference current from the voltage across the termination (is this what you meant by series resistor?).
--- End quote ---

Yes. Function gen direct outputas are limited in output current though, so I'd have to find another solution. But yes the idea is series resistor that can be scoped for comparison. If not ground referenced then I can use my HVP70 70MHz diff probe or a floating scope.

Martin72:

--- Quote from: electr_peter on November 19, 2022, 10:20:51 pm --- Price difference makes no sense to me, because B version just has different form factor with same specs.

--- End quote ---

Look again....
One fits only in micsig scopes, the other(B) is universal for all scopes and got dedicated circuits for it.
Dave:
Which version will you get ?

EEVblog:

--- Quote from: Martin72 on November 19, 2022, 10:35:27 pm ---
--- Quote from: electr_peter on November 19, 2022, 10:20:51 pm --- Price difference makes no sense to me, because B version just has different form factor with same specs.

--- End quote ---

Look again....
One fits only in micsig scopes, the other(B) is universal for all scopes.
Dave:
Which version will you get ?

--- End quote ---

The B version for all scope of course. Practically zero market for a Micsig interface unit.

Martin72:
Hm...


--- Quote ---Practically zero market for a Micsig interface unit.
--- End quote ---

Therefore it makes sense when this version is cheaper...or not, I´m a little bit confused. :D

https://www.saelig.com/micsig/cp503b.htm

They want double the price you offer, but same price (499) for the version which fits only to micsig scopes.

https://www.saelig.com/micsig/cp503.htm

nctnico:

--- Quote from: EEVblog on November 19, 2022, 10:34:56 pm ---
--- Quote from: Hydron on November 19, 2022, 06:09:14 pm ---Dave, a quick and dirty way of measuring them would be to break out a sig-gen output via a loop section big enough to clamp around, then terminate it with 50R and derive the reference current from the voltage across the termination (is this what you meant by series resistor?).
--- End quote ---

Yes. Function gen direct outputas are limited in output current though, so I'd have to find another solution. But yes the idea is series resistor that can be scoped for comparison. If not ground referenced then I can use my HVP70 70MHz diff probe or a floating scope.

--- End quote ---
I have a DC load that is switching (low inductance planar) resistors through MOSFETs to achieve various resistance values. It can do seriously steep current changes in 'PSU torture' mode. It is only limited by wire inductance.

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