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Micsig Current Probe CP2100A/B Tests and Comparing

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Algasman:
No complaints so far ...
Looks like I got an A-Version with almost B-Specs. I’d say my unit has a bandwidth > 2MHz.
Maybe the binning Elasia suggested in an earlier post, isn’t so unlikely.
Would be nice to see a similar measurement with a real B Probe or other A versions.
Suggestions for a better test setup are also welcome.
Here are my measurements and an updated graph:

bicycleguy:
I have a B model to compare.  Did you re-adjust the SDG output at each level.  I noticed the voltage across the resistor drops a little with frequency.

Elasia:
I'd still put my money on that they would bin them

Solid design.. some flux in the components so just mass produce in one step with common components for cheap then tune after -> then a grading bin and done

EEVblog:

--- Quote from: Algasman on October 13, 2020, 09:13:23 pm ---After following the discussions and trying to decide if I should go with the A or B version, I decided for the economic more bang for the buck A-Version.
Last week I got it delivered so I wanted to check the performance myself. The results are almost too good to be true, so I would like to know if you agree with my test setup.
(Attachment Link)
SDG1032X as source, feeding a BNC-connector through 5 loops on the current probe clamp into 3x150 Ohms. SDS1204X-E Channel 1 Voltage of 50 Ohm load resistor, 10x Probe, Channel 4 CP2100A 2x (because of the 5 turn coil)
(Attachment Link)
During measurement, I maintained 2,50V RMS over the load resistor, and measured the current as RMS (nominal 50mA)
(Attachment Link)
This picture shows the voltage and current @800kHz, the nominal bandwidth of the CP2100A.
(Attachment Link)
To me this looks much better than the specs, is my setup suitable for bandwidth measurement?

--- End quote ---

The bandwidth of the A model is 2.3MHz?  :-//

Algasman:

--- Quote from: bicycleguy on October 23, 2020, 03:41:16 am ---I have a B model to compare.  Did you re-adjust the SDG output at each level.  I noticed the voltage across the resistor drops a little with frequency.

--- End quote ---
Yes
During measurement, I maintained 2,50V RMS over the load resistor, and measured the current as RMS (nominal 50mA)
I measured the voltage at the resistor with channel 1 of the scope and adjusted the output voltage of the signal generator accordingly. Constant voltage on the load resistor leads to a constant current through the loop (“RMS constant” since we're using AC)
The signal generator does not see a pure resistive load, there is also the inductance of the five turn coil. The dent around 4MHz could be some resonance effect.

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