Micsig CP1003/CP503 100MHz/50MHz Current Probe

[Dennis Frie]

I was debating whether to buy the Siglent CP6030 or the Micsig CP503B current probe. Considering the price-tag of the Micsig CP503B probe, I decided it was still an interesting probe, even with the linearity issues.
I have to say, so far the noise and DC accuracy is pretty damn good.

I've played around a bit with the frequency response, trying to measure it at slightly higher currents. Still pretty bad compared to the specs as shown previously in this thread, but overall not a bad current probe the price considered. Compared to the 100 MHz model tested earlier in this thread, I see no reason to buy the 100 MHz as the linearity problems seems comparable.
I will probably stick to the Lecroy CP030 probes for high-frequency stuff, but a great probe for a lot of other things.

[Dennis Frie]

Direct comparison of the measurement Martin72 did.
Same scaling on the y-axis, but tested with higher current. Considering I get significantly better linearity with a 50 Mhz probe, I either got lucky with the probe or the higher current makes a difference.

Yellow = Martin72' original test
Green = my trace copied into the image

Tested with 5 Vpp, 25R load (50R external + 50R internal in scope) and 3 turns on current probe. Gives approx. 400 mApp @ 1 kHz

[Martin72]

Hi,
That looks better, but if this behavior only occurs at higher currents, it's still not for me.
Apart from that, I'm disappointed with Micsig's support; they never got back to me.
No, I'll wait until I can afford the Siglent Current probe:
https://www.eevblog.com/forum/testgear/siglent-cp6030-current-probe-a-very-very-short-review/msg5352083/#msg5352083

Until then, I'm doing fine with my Tektronix A6302...

[Dennis Frie]

Hi,
That looks better, but if this behavior only occurs at higher currents, it's still not for me.
Apart from that, I'm disappointed with Micsig's support; they never got back to me.
No, I'll wait until I can afford the Siglent Current probe:
https://www.eevblog.com/forum/testgear/siglent-cp6030-current-probe-a-very-very-short-review/msg5352083/#msg5352083

Until then, I'm doing fine with my Tektronix A6302...

Yeah I did consider the Siglent CP6030 after reading your tests. No doubt it's a better probe, but it also comes at a significantly higher price.
I think the Micsig probe has its place, but the datasheet specs and graphs are misleading.