Author Topic: New low-cost ($170) 100MHz Differential scope probe from Micsig  (Read 40559 times)

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Offline tautech

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Re: New low-cost ($170) 100MHz Differential scope probe from Micsig
« Reply #25 on: July 13, 2017, 07:57:13 pm »
Kudos for the 5V power input, as it can be powered by ordinary cellphone's power bank.
More so for the USB jack on the side so they can be daisy chained.  :-+
Someone was using their gray matter.  :clap:
not enough grey matter. that thing need mains supply or power bank around in order to work. i wish someone has enough wisdom of using 2 rechargable li-on stacked inside (preferably 18650 size hence easily replacable) 7.2V with charging circuitry (from 5V USB) that doesnt block operation during charging (ie charging while probing)...
Well until somebody does a teardown we'll never know.
DC-DC convertor ..................
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Offline simone.pignatti

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Re: New low-cost ($170) 100MHz Differential scope probe from Micsig
« Reply #26 on: July 13, 2017, 08:44:01 pm »
In case of interest, we have the combo kit (2x) at Euro 185 + VAT
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Offline TheAmmoniacal

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Re: New low-cost ($170) 100MHz Differential scope probe from Micsig
« Reply #27 on: July 13, 2017, 08:53:17 pm »
What do you mean by a combo-kit? Two units?
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Offline simone.pignatti

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Re: New low-cost ($170) 100MHz Differential scope probe from Micsig
« Reply #28 on: July 13, 2017, 08:53:59 pm »
Yes
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Offline TheAmmoniacal

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Re: New low-cost ($170) 100MHz Differential scope probe from Micsig
« Reply #29 on: July 13, 2017, 09:00:59 pm »
If I wasn't on vacation at the moment I'd likely go for it.. Do you want VAT too?
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Offline simone.pignatti

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Re: New low-cost ($170) 100MHz Differential scope probe from Micsig
« Reply #30 on: July 13, 2017, 09:02:53 pm »
Better to stay in holiday ;)
About VAT, yes it is mandatory within EU but not for registered company.
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Offline Hydron

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Re: New low-cost ($170) 100MHz Differential scope probe from Micsig
« Reply #31 on: July 13, 2017, 09:10:32 pm »
In case of interest, we have the combo kit (2x) at Euro 185 + VAT
I am very interested, can you PM me the details of how to place an order for the combo kit?

Only thing that stopped me already ordering one is that nobody seems to have testedd one to check if it does what Micsig says (i.e. noise level, bandwidth etc). Have you tried one of these probes out yourself?
 

Offline TheAmmoniacal

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Re: New low-cost ($170) 100MHz Differential scope probe from Micsig
« Reply #32 on: July 13, 2017, 09:12:17 pm »
That's why we need a review and a teardown, but mike is busy.

What about a side-by-side comparison with Dave's diff probe? Drawbacks of 50X/500X vs. 10X/100X.
« Last Edit: July 13, 2017, 09:16:38 pm by TheAmmoniacal »
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Offline simone.pignatti

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Re: New low-cost ($170) 100MHz Differential scope probe from Micsig
« Reply #33 on: July 13, 2017, 09:16:16 pm »
In case of interest, we have the combo kit (2x) at Euro 185 + VAT
I am very interested, can you PM me the details of how to place an order for the combo kit?

Only thing that stopped me already ordering one is that nobody seems to have testedd one to check if it does what Micsig says (i.e. noise level, bandwidth etc). Have you tried one of these probes out yourself?

message sent
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Offline Mechatrommer

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Re: New low-cost ($170) 100MHz Differential scope probe from Micsig
« Reply #34 on: July 13, 2017, 09:54:43 pm »
Kudos for the 5V power input, as it can be powered by ordinary cellphone's power bank.
More so for the USB jack on the side so they can be daisy chained.  :-+
Someone was using their gray matter.  :clap:
not enough grey matter. that thing need mains supply or power bank around in order to work. i wish someone has enough wisdom of using 2 rechargable li-on stacked inside (preferably 18650 size hence easily replacable) 7.2V with charging circuitry (from 5V USB) that doesnt block operation during charging (ie charging while probing)...
Well until somebody does a teardown we'll never know.
DC-DC convertor ..................
from the spec, the power supply is DC 5V and USB, no mentioning of battery size or unplugged operating hour, no power switch etc. i have suspicion there is no battery in there.
if something can select, how cant it be intelligent? if something is intelligent, how cant it exist?
 

Offline simone.pignatti

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Re: New low-cost ($170) 100MHz Differential scope probe from Micsig
« Reply #35 on: July 13, 2017, 10:01:29 pm »
Correct, no battery. the pic shows what we have
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Offline Jeroen13

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Re: New low-cost ($170) 100MHz Differential scope probe from Micsig
« Reply #36 on: July 13, 2017, 11:04:20 pm »
In case of interest, we have the combo kit (2x) at Euro 185 + VAT

Do you have a webshop or just 2 probe spare ?
 

Offline simone.pignatti

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Re: New low-cost ($170) 100MHz Differential scope probe from Micsig
« Reply #37 on: July 13, 2017, 11:06:12 pm »
we have a webshop  :-+
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Offline Jeroen13

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Re: New low-cost ($170) 100MHz Differential scope probe from Micsig
« Reply #38 on: July 13, 2017, 11:21:32 pm »
Just ordered 2 pieces, will try to compare it to Tek THDP0200 and Tek IsoVu TIVM at work when I have them.
« Last Edit: July 13, 2017, 11:24:46 pm by Jeroen13 »
 

Offline simone.pignatti

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Re: New low-cost ($170) 100MHz Differential scope probe from Micsig
« Reply #39 on: July 13, 2017, 11:22:19 pm »
thanks, shipping out today
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Offline JPortici

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Re: New low-cost ($170) 100MHz Differential scope probe from Micsig
« Reply #40 on: July 14, 2017, 12:15:56 am »
Hi simone, for how long are you going to do this promotion?
 

Offline simone.pignatti

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Re: New low-cost ($170) 100MHz Differential scope probe from Micsig
« Reply #41 on: July 14, 2017, 12:17:10 am »
ciao, for sure till September '17
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Online 2N3055

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Re: New low-cost ($170) 100MHz Differential scope probe from Micsig
« Reply #42 on: July 14, 2017, 12:18:46 am »
With a 500X probe, noise is potentially problematic...
Does anybody know what is noise spec ..?
 

Offline simone.pignatti

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Re: New low-cost ($170) 100MHz Differential scope probe from Micsig
« Reply #43 on: July 14, 2017, 12:22:07 am »
?40mVrms (50X)

?230 mVrms (500X)
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Offline Hydron

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Re: New low-cost ($170) 100MHz Differential scope probe from Micsig
« Reply #44 on: July 14, 2017, 12:25:16 am »
Input referred noise spec:
?40mVrms (50X)
?230 mVrms (500X)

An example of pk-pk noise (measured by Micsig, compared with Tek P5200A) can be seen on the aliexpress listing linked in the OP.

If the noise spec (and other specifications) are true, these could be a really good deal if the somewhat low sensitivity (50x) is OK for the intended application.

edit: see http://www.micsig.com/UploadFiles/file/High%20Voltage%20differential%20probe.pdf
I note the oddity of 75R output impedance though - not an issue if it's driving 1Mohm input, but unusual and annoying if you want to drive 50R! Is this really the impedance, or is it a typo?
« Last Edit: July 14, 2017, 12:28:14 am by Hydron »
 
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Offline nidlaX

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Re: New low-cost ($170) 100MHz Differential scope probe from Micsig
« Reply #45 on: July 14, 2017, 12:49:25 am »
Input referred noise spec:
?40mVrms (50X)
?230 mVrms (500X)

An example of pk-pk noise (measured by Micsig, compared with Tek P5200A) can be seen on the aliexpress listing linked in the OP.

If the noise spec (and other specifications) are true, these could be a really good deal if the somewhat low sensitivity (50x) is OK for the intended application.

edit: see http://www.micsig.com/UploadFiles/file/High%20Voltage%20differential%20probe.pdf
I note the oddity of 75R output impedance though - not an issue if it's driving 1Mohm input, but unusual and annoying if you want to drive 50R! Is this really the impedance, or is it a typo?
It is actually 75 Ohms according to their engineering department. I told them it's a strange choice, not sure why they made this decision. Keep this in mind if you decide to use a BNC cable extension.

By the way, if anyone finds any typos in or needs clarifications regarding anything in the user manual, let me know.
 

Offline DK-1

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Re: New low-cost ($170) 100MHz Differential scope probe from Micsig
« Reply #46 on: July 14, 2017, 05:47:54 am »
I bought 2 just now!
For this price i was too much curious to try it, when arrived i will tell something
 

Offline nctnico

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Re: New low-cost ($170) 100MHz Differential scope probe from Micsig
« Reply #47 on: July 14, 2017, 05:54:53 am »
Is there any CAT rating on this differential probe? Without it I wouldn't want to use it on anything mains powered.
There are small lies, big lies and then there is what is on the screen of your oscilloscope.
 

Offline alm

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Re: New low-cost ($170) 100MHz Differential scope probe from Micsig
« Reply #48 on: July 14, 2017, 07:05:29 am »
It does not appear to be silkscreened on the case or printed in the datasheet, so I would assume not. Probably no independent testing either. So safety for mains voltages is suspect.
 

Offline Mechatrommer

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Re: New low-cost ($170) 100MHz Differential scope probe from Micsig
« Reply #49 on: July 14, 2017, 09:29:18 am »
Input referred noise spec:
?40mVrms (50X)
?230 mVrms (500X)

An example of pk-pk noise (measured by Micsig, compared with Tek P5200A) can be seen on the aliexpress listing linked in the OP.

If the noise spec (and other specifications) are true, these could be a really good deal if the somewhat low sensitivity (50x) is OK for the intended application.

edit: see http://www.micsig.com/UploadFiles/file/High%20Voltage%20differential%20probe.pdf
I note the oddity of 75R output impedance though - not an issue if it's driving 1Mohm input, but unusual and annoying if you want to drive 50R! Is this really the impedance, or is it a typo?
It is actually 75 Ohms according to their engineering department. I told them it's a strange choice, not sure why they made this decision. Keep this in mind if you decide to use a BNC cable extension.

By the way, if anyone finds any typos in or needs clarifications regarding anything in the user manual, let me know.
the output coax cable probably 75ohm.just add 75ohm terminator at scope end to get nonoddities 100/1000x figure.
if something can select, how cant it be intelligent? if something is intelligent, how cant it exist?
 


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