Micsig has Optic fiber AND HF current Probes?!

[scoper007]

Optical Isolation Probe OIP Series
Bandwidth: 350M
Rise time: ≤1ns
Accuracy: 1%
Common mode voltage: 60kV peak
Common Mode Rejection Ratio: Up to 160dB


High frequency AC and DC current probe CP1003
Bandwidth: DC~100MHz
Range: 6A/30A
DC Accuracy (Typical): ±1%±10mA (6A); ±1%±50mA (30A)

[gby]

Color me very interested in learning more about the optically isolated probe.  More detailed specs, pricing, availability.

Could not find any details on micsig.com.  How did you find this?

[Hydron]

Also definitely interested in more details, especially the optical one (fingers crossed Dave or someone else will get sent one again and do a teardown, like with their earlier current probe). Shame that it seems that these are a Micsig exclusive probe - they've previously released a few well priced probes that are compatible with any scope.

[Fungus]

Micsig sure is aiming high with their next round of products!

[Marco]

So where's the page these were linked at? Or did you stumble on the image urls?

Given the price of Tek/LeCroy solutions and the relatively low manufacturing costs it was a matter of time for a Chinese version.

[nomead]

Nothing seems to dictate similar adapter included with previous differential probe (DP750) wouldn't be included. Illustration of the CP1003 actually shows adapter so i suppose at least this will have adapter option.

New probes are on chinese site (link in upper right corner).

[nomead]

It looks like fiber probe supports 50 ohm and 1M input impedances through BNC. Passive probes are available with 10x (P130B) and 100x (P3100) attenuation.

[TopQuark]

Quite interested at the new products, took a look at the product page and translated the specs table for anyone interested.

[Marco]

It's a shame the optical probe isn't active too but I guess for something driving some high voltage switch those few extra pF don't really matter, which is the most common application to measure.

[nomead]

While these don't directly compete with IsoVu-probes, i don't think price will be anywhere near 10-15k$.   

[JPortici]

Current probe power supply 12V... External adapter or battery powered?

[Martin72]

Would be with adapter I guess.
The probe is IMHO another from hioki*, price for it won´t be cheap.

*) All "good" current probes from Siglent, Lecroy, R&S, Rigol are the same building by hioki, only different in the connections.

[nomead]

Chinese website claims Micsigs UPI interface provides the power. Maybe UPI provides also 12V? PA12 PSU is offered for non-Micsig scopes.

[Hydron]

The bit about auto/manual nulling and gain adjustment makes me think that the optical probe might be based on an open loop analogue optical modulation, i.e. turn input voltage into a level-shifted current to drive a laser/LED, receive with a linear analogue-output detector. The gain and null adjustments mentioned would be needed to periodically tweak gain/offset to adjust for temperature/time/fibre movement, and reverse the level-shift needed for the optical transmitter.

I've actually had a bit of a play doing this in a DIY manner (didn't get much beyond looking at the frequency response of a HFBR-2416/1414 pair), and I think there are other products out there doing it in a similar manner, but with a fair bit less bandwidth.

[PartialDischarge]

This probe is probably the same as a Lecroy DL03-ISO but without the Power over Fiber and has a rechargeable battery instead. It most probably, again, works with an optical modulator, Mach Zenhder, Kerr effect, Pockels, or similar.  Someone must be making this for them. One problem is that for auto adjustment the input signal needs to be removed.

[gby]

The current probes might be a re-brand of the new Pintech current probes.  See https://www.pintech.com.cn/en/h-col-123.html

The Pintech PT-350 has the same funky 60 Ap-p rating, is 50 MHz, 5 mm max wire diameter, and looks visually similar.  Not sure where the 100 MHz one comes from since I did not see a 100 MHz Pintech version.

[Marco]

This probe is probably the same as a Lecroy DL03-ISO but without the Power over Fiber and has a rechargeable battery instead. It most probably, again, works with an optical modulator, Mach Zenhder, Kerr effect, Pockels, or similar.  Someone must be making this for them. One problem is that for auto adjustment the input signal needs to be removed.

Why would you do that instead of just modulating the laser diode current?

[switchabl]

This probe is probably the same as a Lecroy DL03-ISO but without the Power over Fiber and has a rechargeable battery instead. It most probably, again, works with an optical modulator, Mach Zenhder, Kerr effect, Pockels, or similar.  Someone must be making this for them. One problem is that for auto adjustment the input signal needs to be removed.

Why would you do that instead of just modulating the laser diode current?

The Tek IsoVu (and probably the Lecroy as well) have the laser on the scope-side, so they must have an EOM in the probe head. Of course, if you get rid of power-over-fiber anyway and have a reasonably large battery instead, you might as well go all the way and move the laser to the probe head as well. Maybe you can even use a COTS integrated transmitter (but linearity and drift might be a challenge). I would love to see a teardown.

[Someone]

The current probes might be a re-brand of the new Pintech current probes.  See https://www.pintech.com.cn/en/h-col-123.html

The Pintech PT-350 has the same funky 60 Ap-p rating, is 50 MHz, 5 mm max wire diameter, and looks visually similar.  Not sure where the 100 MHz one comes from since I did not see a 100 MHz Pintech version.

Not enough other specs line up and the body/casing is completely different in the photos so probably not pintech sourced. Equally its not sharing specs or casing with any Hioki probes so this might be a new entrant to the market.

[Fungus]

Why would you do that instead of just modulating the laser diode current?

350Mhz?

[nomead]

Not enough other specs line up and the body/casing is completely different in the photos so probably not pintech sourced. Equally its not sharing specs or casing with any Hioki probes so this might be a new entrant to the market.

I think specs match quite well with Hioki 3276.

https://www.hioki.com/euro-en/products/current-probes/wide-band/id_6016

Micsig has added 6A range to the BNC end and omitted (is that Lemo?) power connector.

[Someone]

Not enough other specs line up and the body/casing is completely different in the photos so probably not pintech sourced. Equally its not sharing specs or casing with any Hioki probes so this might be a new entrant to the market.

I think specs match quite well with Hioki 3276.
https://www.hioki.com/euro-en/products/current-probes/wide-band/id_6016
Micsig has added 6A range to the BNC end and omitted (is that Lemo?) power connector.

When the DC accuracy improves at lower ranges (as the CP1003, and 30A to 5A range of Hioki CT6711) it suggests the amplification is at the probe end in the sensing and not just a simple after the fact gain stage.

[Marco]

350Mhz?

CATV goes to a couple GHz with cheap analogue ROSAs/TOSAs. Obviously direct modulation can go far faster than this, but this is a huge market for low cost parts.

PS. I misremembered, just over a GHz, still good enough. The FTTH ROSAs are commodity items, probably a couple bucks at most in Shenzhen. The TOSAs I don't know, transmitters can be had for under a 75$ but, it's probable the TOSAs are far cheaper still.

[BH3XON]

While these don't directly compete with IsoVu-probes, i don't think price will be anywhere near 10-15k$.   

The attached picture is the price I got and I think is attractive.

[TopQuark]

While these don't directly compete with IsoVu-probes, i don't think price will be anywhere near 10-15k$.   

The attached picture is the price I got and I think is attractive.

Seems like you need to do a bunch of stuff through Wechat to get the VIP pricing, I got stuck at the phone number verification part (needs a mainland number), guess I'll see what they sell it at when it officially launches through taobao etc.