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Choosing bandwidth on an oscilloscope current probe
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6SN7WGTB:
I am about to purchase a Micsig 2100A or B.

I already have a Rigol MSO5000 series 'scope and the rather good Micsig DP-750 diff probe.

My intended purpose is primarily power quality analysis - AC 50Hz driven SMPS and other PSUs, with secondary analysis of valve amplifier and test equipment.

What I'm not sure enough about is what bandwidth I actually need i.e. the A or B version, and would appreciate some sage advice. To some extent the seeming over-performance of the A has thrown a spanner into the works.

I CAN run to the B version so if it ends up as A OK but B more desirable then I'm OK with that.

Thank you.
6SN7WGTB:
No-one, really?
Martin72:
Hi,

You know "my" thread about the micsig currentprobe ?

https://www.eevblog.com/forum/testgear/micsig-current-probe-cp2100b-tests-and-comparing/msg3072460/#msg3072460

The 800khz version could be enough for your purposes but be aware that the clamp is not the smallest on the market.
When using power analyzis on the rigol, don“t forget the channel deskew between voltage and current probe.
Fungus:
A is OK and will do what you want but B is obviously more desirable.

Hydron:
The "800kHz" one I got for work seemed to have a -3dB point of >2.5MHz, so not really sure how they decide what differentiates the A and B versions. Maybe I just got lucky? Or maybe there is something more subtle they use to pick the best ones to sell as the higher BW model?
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