Products > Test Equipment

Micsig CP1003/CP503 100MHz/50MHz Current Probe

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Martin72:
OK, not.. ;)

I have just asked Batronix if they would lend me a CP1003B for testing.
Then I could make additional measurements and check it´s frequency response.

_Wim_:

--- Quote from: amar87 on January 09, 2024, 07:38:24 pm ---
I wanted to see what happens if the probe will just stay on the coax.... so don't ask why

(Attachment Link)

Something weird happens now this is a scope problem but however maybe it give a clue on the issue

Ran the bode plotter 2 times first run gives this:

(Attachment Link)

Second run:

(Attachment Link)

I can't explain the 3 dB shift. This is related to what _Wim_ said in a previous post.

But my conclusion so far is having the probe on the coax does not change the frequency response wanted to see just in case.

--- End quote ---

I am not sure how the bode plotting function on the siglent works, but the voltage show on channel on does differ from run 1 to run 2. I would however expected this bode plot to be zero dB gain or -6dB in gain (due to the 50 ohm input), I do not understand where these positive gains are coming from as they is no amplifier in the cable. Could it be that the "reference" and the "test signal" are swapped? Normally I expect a bode plotting function to report the difference in gain between the reference input and the test input, and in the case of only a BNC cable between the two, this should not create any gain... :-//

Martin72:
My previous "only cable test" I did several times, always with the same result.

amar87:
i had the probe input on 2x on channel 1 that is where the 'gain' is comming from.... sorry for the confusion.... The scope leaves it like that if you change from current to voltage. I just did not bother to change it.

Martin72:

--- Quote from: Martin72 on January 09, 2024, 10:27:57 pm ---I have just asked Batronix if they would lend me a CP1003B for testing.

--- End quote ---

Not, but they suggested to "buy" it and return inbetween 30days.
And that´s what I did, should arrive in the next days. ;)

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