Products > Test Equipment
Micsig CP1003/CP503 100MHz/50MHz Current Probe
Martin72:
Finally, a few measurements with the square wave function of the SDG1122X.
The phase shifts correspond well with what you could see on the bodeplot.
At 1Mhz you can see overshoots in the micsig, I think this is due to the impedance of 1M Ohm.
The Tektronix is clearly ahead in terms of signal fidelity.
I will soon be taking measurements in the "practicable" range, i.e. up to 500kHz, roughly the maximum switching frequency of appropriately constructed power supplies.
Martin72:
I am now in contact with Micsig.
They wanted more pictures or even a video of how I measured it.
Because I had asked them how they had carried out their measurements in order to achieve such a smooth linear curve. ;)
The vertical scaling with 0dB alone cannot be right.
And they promptly asked back why I was in the mid -30db range...instead of telling me how they had measured it.
Anyway, I took new pictures today and to show them that it can hardly be due to my setup, a new measurement with my tektronix A6302 and then another direct connection.
Let's see what they say.
In addition, I will soon be able to measure another "reference".
I have ordered a siglent CP6030 current clamp for work... 8)
amar87:
they also told me the same thing.... to make a video sadly i had no time to do this maybe next week it gets better.
Martin72:
But I don't know why they want a video.
I think the pictures are enough.
Both current clamps have the same behavior.
Both current clamps come from different suppliers.
The setup is pretty much the same for both - well, then you could argue that you're doing something wrong.
However, the significantly better behavior of the Tek probe with the same setup speaks against this.
Micsig has not contacted me again after the other pictures, perhaps they are trying to recreate it themselves.
Next weekend I will make more practical measurements, these bandwidth measurements are more of academic interest.
Martin72:
Still no answer from them...
Before starting new measurements, I took two other tek probes from work to home and compared them with my private one.
A nice to know, not more.. ;)
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