Micsig has Optic fiber AND HF current Probes?!  - Page 1
Forum section: electronics / testgear

author: scoper007
author_rank: Contributor
timestamp: July 15, 2022, 02:17:13 am
content: Optical Isolation Probe OIP SeriesBandwidth: 350MRise time: ≤1nsAccuracy: 1%Common mode voltage: 60kV peakCommon Mode Rejection Ratio: Up to 160dBHigh frequency AC and DC current probe CP1003Bandwidth: DC~100MHzRange: 6A/30ADC Accuracy (Typical): ±1%±10mA (6A); ±1%±50mA (30A)

author: gby
author_rank: Frequent Contributor
timestamp: July 15, 2022, 06:07:27 am
content: 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?

author: Hydron
author_rank: Super Contributor
timestamp: July 15, 2022, 09:34:15 am
content: 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.

author: Fungus
author_rank: Super Contributor
timestamp: July 15, 2022, 11:02:34 am
content: Micsig sure is aiming high with their next round of products!

author: Marco
author_rank: Super Contributor
timestamp: July 15, 2022, 11:26:08 am
content: 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.

author: nomead
author_rank: Contributor
timestamp: July 15, 2022, 11:34:39 am
content: 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).

author: nomead
author_rank: Contributor
timestamp: July 15, 2022, 11:41:40 am
content: 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.

author: TopQuark
author_rank: Frequent Contributor
timestamp: July 15, 2022, 12:13:17 pm
content: Quite interested at the new products, took a look at the product page and translated the specs table for anyone interested.

author: Marco
author_rank: Super Contributor
timestamp: July 15, 2022, 12:17:44 pm
content: 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.

author: nomead
author_rank: Contributor
timestamp: July 15, 2022, 12:55:50 pm
content: While these don't directly compete with IsoVu-probes, i don't think price will be anywhere near 10-15k$.

author: JPortici
author_rank: Super Contributor
timestamp: July 15, 2022, 01:02:03 pm
content: Current probe power supply 12V... External adapter or battery powered?

author: Martin72
author_rank: Super Contributor
timestamp: July 15, 2022, 01:09:55 pm
content: 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.

author: nomead
author_rank: Contributor
timestamp: July 15, 2022, 01:28:49 pm
content: Chinese website claims Micsigs UPI interface provides the power. Maybe UPI provides also 12V? PA12 PSU is offered for non-Micsig scopes.

author: Hydron
author_rank: Super Contributor
timestamp: July 15, 2022, 04:16:52 pm
content: 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.

author: PartialDischarge
author_rank: Super Contributor
timestamp: July 15, 2022, 05:37:51 pm
content: 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.

author: gby
author_rank: Frequent Contributor
timestamp: July 15, 2022, 08:44:02 pm
content: The current probes might be a re-brand of the new Pintech current probes. Seehttps://www.pintech.com.cn/en/h-col-123.htmlThe 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.

author: Marco
author_rank: Super Contributor
timestamp: July 15, 2022, 08:57:19 pm
content: Quote from: PartialDischarge on July 15, 2022, 05:37:51 pmWhy would you do that instead of just modulating the laser diode current?

author: switchabl
author_rank: Frequent Contributor
timestamp: July 15, 2022, 09:58:58 pm
content: Quote from: Marco on July 15, 2022, 08:57:19 pmThe 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.

author: Someone
author_rank: Super Contributor
timestamp: July 16, 2022, 12:22:44 am
content: Quote from: gby on July 15, 2022, 08:44:02 pmNot 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.

author: Fungus
author_rank: Super Contributor
timestamp: July 16, 2022, 08:23:10 am
content: Quote from: Marco on July 15, 2022, 08:57:19 pm350Mhz?

author: nomead
author_rank: Contributor
timestamp: July 16, 2022, 10:40:03 am
content: QuoteI think specs match quite well with Hioki 3276.https://www.hioki.com/euro-en/products/current-probes/wide-band/id_6016Micsig has added 6A range to the BNC end and omitted (is that Lemo?) power connector.

author: Someone
author_rank: Super Contributor
timestamp: July 16, 2022, 12:16:57 pm
content: Quote from: nomead on July 16, 2022, 10:40:03 amWhen 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.

author: Marco
author_rank: Super Contributor
timestamp: July 16, 2022, 03:01:45 pm
content: Quote from: Fungus on July 16, 2022, 08:23:10 amCATV 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.

author: BH3XON
author_rank: Contributor
timestamp: July 18, 2022, 10:57:14 am
content: Quote from: nomead on July 15, 2022, 12:55:50 pmThe attached picture is the price I got and I think is attractive.

author: TopQuark
author_rank: Frequent Contributor
timestamp: July 18, 2022, 01:28:27 pm
content: Quote from: BH3XON on July 18, 2022, 10:57:14 amSeems 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.

author: scoper007
author_rank: Contributor
timestamp: July 19, 2022, 03:24:34 am
content: Got all the info from their Chinese website:https://www.micsig.com.cn/OIP/, not seen any from English site. Pre-sale started last week inside China, guess they are just not ready for overseas yet (asked when, says need to wait couple months~~)

author: Construct
author_rank: Contributor
timestamp: October 21, 2022, 04:19:06 pm
content: The high frequency current probe is now live on the English MicSig site:https://www.micsig.com/CP1003/I haven't found them listed at any of my normal retailers, though.

author: Martin72
author_rank: Super Contributor
timestamp: October 21, 2022, 04:54:26 pm
content: I´m very curious about the prices...

author: DaneLaw
author_rank: Frequent Contributor
timestamp: October 23, 2022, 02:43:23 am
content: Quote from: Martin72 on October 21, 2022, 04:54:26 pmYou can get a rough estimate on Micsig's MSRP prices in China, and the western-prices will likely not be that far from that.. perhaps with some added VAT.Micsig's own T-Mall store for CN customers..--CP1003/B - A tad under 2.500USD (18K CNY)OIP350 - Around 4150 USD. (30K CNY)Dated Micsig pricing, "demand & supply" early days limited stock, reason for our elevated MSRP on our official store.Micsigs own JD & Taoboa/Tmall sources, that Micsig-China links, as their two main sources to buy for consumers in ChinaJDhttps://item.jd.com/10073270455346.htmlTmall/TaobaoCP1003/Bhttps://detail.tmall.com/item_o.htm?spm=a312a.7700824.w4011-23144556654.108.38b55e49r6s4Kz&id=678687211634OIP350https://detail.tmall.com/item_o.htm?spm=a312a.7700824.w4011-23144556654.136.38b55e49r6s4Kz&id=682890766876

author: Martin72
author_rank: Super Contributor
timestamp: October 23, 2022, 11:01:35 am
content: The 50A probe which I´m interested in will cost appx 2000€...To be fair, when their probes are quite as good as the pendants from hioki, they will be ultra-cheap, no question.But it´s too much for me..So I must continue fixing one tek probe out of three...

author: scoper007
author_rank: Contributor
timestamp: October 24, 2022, 10:55:23 am
content: According to their previous pricing policy in overseas markets, the new 50A probe should not be so expensive, my guess would be 1500$, tops.

author: Martin72
author_rank: Super Contributor
timestamp: October 24, 2022, 09:07:54 pm
content: Well, let´s see when the probes will appearing on the batronix website..

author: IDEngineer
author_rank: Super Contributor
timestamp: October 25, 2022, 05:25:14 pm
content: Today I received via email a nice PDF flyer direct from Micsig for the CP500/1000 series current probes, suggesting they are finally bringing these to the US market. No US pricing info, and they direct you to "please contact your local distributor to get the special offer for NEW Micsig High Frequency AC/DC current probe!" Sadly they don't list who their US distributors are but I presume that will be forthcoming.I'm thrilled they're releasing these as the available choices for high bandwidth clamp current probes has always been very limited. Of course, so is the total market for them.I'm not too happy with their minimum measurable current, though. The 6A version lists 20mA as the bottom end. It's not unusual at all to want to view current behavior below double digit milliamps.

author: alm
author_rank: Super Contributor
timestamp: October 25, 2022, 05:41:49 pm
content: Quote from: IDEngineer on October 25, 2022, 05:25:14 pmI don't think the market is that small. They're very useful for a lot of power electronics work. It's just that the market had been dominated by (from highest to lowest performance) Tektronix, Hioki and LEM and their various rebrands (Lecroy, Keysight) so far, and people have been forced to pay their prices. If this is an original design, and not another probe made by Hioki, then I'm curious about the performance.Quote from: IDEngineer on October 25, 2022, 05:25:14 pmNo, indeed, since you can fly to the moon and beyond on 20 mA these days. This suggests that the gain of the Hall-effect sensor is lower than Tek and Hioki: less sophisticated sensor or attachment to the ferrite core. You can increase the sensitivity by wrapping multiple turns of the wire around the probe, but that increases insertion impedance.

author: EEVblog
author_rank: Unknown
timestamp: November 19, 2022, 12:50:34 am
content: Quote from: scoper007 on October 24, 2022, 10:55:23 amI can sell the 50MHz CP502B version for under US$500

author: gby
author_rank: Frequent Contributor
timestamp: December 29, 2022, 07:17:06 pm
content: Micsig has put the OIP series of optical isolation differential probes on the global/English web site right under the products menu.https://www.micsig.com/OIP/Lists specs on the page but no download link for a spec sheet. Unfortunately, I also could not find anyone advertising it for sale yet.

author: scoper007
author_rank: Contributor
timestamp: January 06, 2023, 01:08:38 am
content: Looks like datasheet is on!https://www.micsig.com/uploads/%E5%85%89%E9%9A%94%E7%A6%BB%E6%8E%A2%E5%A4%B4OIP%E7%B3%BB%E5%88%97%E8%8B%B1%E6%96%87%E5%BD%A9%E9%A1%B5_20230103(1)_1672816254.pdf

author: scoper007
author_rank: Contributor
timestamp: January 06, 2023, 01:12:47 am
content: And they posted a comparison article against Tek's TIVP1 probe,in Chinese (bear with it):https://mp.weixin.qq.com/s/IQk-UarNrxcv1pZRlUz06w

author: scoper007
author_rank: Contributor
timestamp: January 06, 2023, 01:28:30 am
content: Waveform looking sharp.

author: nimish
author_rank: Regular Contributor
timestamp: February 13, 2023, 03:59:09 am
content: Quote from: scoper007 on January 06, 2023, 01:28:30 amhttps://detail.tmall.com/item.htm?abbucket=18&id=682890766876&rn=aed2f1ea625c211fbbbc1181075913bb&spm=a1z10.5-b-s.w4011-23144556651.54.7fc824bdiDUszm&skuId=4882747500207Lets hope the pricing doesn't stick.

author: gby
author_rank: Frequent Contributor
timestamp: April 26, 2023, 12:59:32 pm
content: Amazon US site has the new MicSig high bandwidth current probes and the Optical Isolation Probes lowest two bandwidth models listed. Prices for the current probes are competitive but higher than folks were hoping. The Optical probes are lower than prices in other countries converted to US $. Very competitive I would say.Current Probes:CP503B 30 Arms 50 MHz BNC $1039CP100B 30 Arms 100 MHz BNC $1339Optical Probes:MOIP01P 100 MHz $1560MOIP02P 200 MHz $1960Higher BW models not listed.Question: Does anyone know what probe tips comes in the case with the optical probes? Specifically which/how many different attenuation probe tips come with the probe? On Amazon the picture shows a case with foam cut out spots for 4 probe tips but only 2 probe tips are in the case.

author: Martin72
author_rank: Super Contributor
timestamp: April 26, 2023, 01:58:23 pm
content: Amazon "here" too...https://www.amazon.de/YuqiaoTime-CP1003B-Frequency-Current-Bandwidth/dp/B0BRXXW4MC/ref=sr_1_1?__mk_de_DE=%C3%85M%C3%85%C5%BD%C3%95%C3%91&crid=2AN7U4JH9F6F4&keywords=CP503B&qid=1682517387&sprefix=cp503b%2B%2Caps%2C128&sr=8-1&th=11237€ for the CP503B...

author: gby
author_rank: Frequent Contributor
timestamp: April 27, 2023, 09:17:37 pm
content: I thought the optical probe pricing looked too good and with 20 in inventory to ship at that.Now US Amazon says:Optical Probes:MOIP01P 100 MHz $3088.99MOIP02P 200 MHz $4633.99or 2.2x higher pricing than yesterday and the Buy button now says Pre order with delivery May 24 to June 14.Will be interesting to see if they ever deliver my order for MOIP02P for $1960. I am not hopeful.Edited 6/18/23: As expected they canceled the MOIP02P at $1960 as a pricing mistake.At this point the "official" list prices at Saelig in the US have stabilized atOptical Probes:MOIP01P 100 MHz $2399MOIP02P 200 MHz $3699MOIP10P 1 GHz $22,299Although eye watering prices for a probe....the Tek IsoVue optical probes list prices are $11,100 for 200 MHz and $29,800 for 1 GHz.Also, Micsig has clarified that each probe comes with just one attenuator probe tip. On Saelig additional probe attenuator tips are $438 or $498 depending on attenuation amount.

author: nimish
author_rank: Regular Contributor
timestamp: June 19, 2023, 06:47:16 pm
content: Quote from: gby on April 27, 2023, 09:17:37 pmAbsolute steals compared to IsoVue or other probes:https://www.batterfly.com/shop/en/saker-xfvp-l10-2Optically isolated probes are just insanely expensive no matter what you do. Maybe Cleverscope is a better deal at 4x channels but it's just an expensive thing to need high CMRR and high isolation and high bandwidth:https://cleverscope.com/files/CS1233%20Power%20Probe%20Presentation.pdf