Thank you for sharing your knowledge -awesome video. Best MicSig review on You Tube and only person to mention the Isolation Transformer. I learn a lot, thanks
I purchased in in USA, but using in India. Though, it was slightly higher than my budget, I really like this investment, as I frequently work on flyback converter and induction cooker circuits, which works on mains voltage. I have been using this probe for past 2 years and there is no issue till date.
At 7:28, the point at emitter of the opto-isolator, which is the reference point of the hot-side, is not "Earth" and should NOT be directly connected to the "Earth" (GND) of the oscilloscope 😱. Otherwise, it will go BANG. The reason is because the circuit is using a full-wave rectifier. But, if was a half-wave rectifier, then it should be okay.
Wrong, it is isolated from the scope as the circuitry of the probe generates a low voltage signal completely isolated. Watch the eevblog teardown if you don't understand what the differential electronics are doing. He explains the mechanics very well.
@@PurityVendetta It’s kind of funny that you refer to EEVblog, because what Dave Jones is saying in his teardown is that the probes are NOT isolated. He even measures with a DMM between the probe tips and ground to demonstrate this in his teardown video.
Might I mention that if you are powering a device like an arduino using a usb lead from a computer there is a direct reference to mains ground through the usb ground. Worth bearing in mind. Does anyone know whether Micsig have solved the common mode rejection issues that were found with the DP0007?
batman will not leave the cave without his bat-belt-differential-probe...👍 👍 lots of evil signals, it's a no joker... 😊 thanks and just what i need for my non-insulated bench scope 👍
Hi, I am just getting into electronics repair, more specifically, car audio amplifier repair, ranging from 18wrms-1000wrms. I know I need an Oscope but there are so many out there and I am not educated enough on the equipment to know what I need or don't need. I know I want one that would have a similar response that a CRT display would have. I say this because I heard there is an input lag with an LCD display which the CRT display does not have. My budget is around $750 and I want an Oscope that will do everything because I don't want to have to upgrade later down the road.
If using a tablet oscilloscope (i.e. battery powered) would it work without isolation ? Also here in Oz we have 240vac .. Could you use the supplied 10x probe to view a 240v generator output ? (Scope Vmax = 400v) . . . Or do we need to factor the Volts peak to peak (and need a 100x probe) ? Thanks for ur awesome videos 👍🏼👍🏼👍🏼
Sir, thank you for this video. I have this probe but haven't had the nerve to use it as I've been working on DC. However, I would like to test the output of my APC 1500 sinewave UPS. My plan is to unplug it and everything from it, connect the Dp10013 to the hot and neutral of tthe battery powered receptacle to see if it is an actual sinewave. I've watched other videos which don't use a diff probe or isolation transformer and it scares the snitzel out of me.
Why not use a battery powered inverter to power the SMPS you are working on and probing? In that case the SMPS is not referenced to the Earth in your home and therefore not the one referenced in your oscilloscope. In which case you would not need differential probes? Or am I missing something?
Hi friend. I have a question. Is this probe necessary to work with 220ac input switching sources? I tell you because there is a previous model. If so, I have to set the oscilloscope scale by 1000x (mine does not have 500x), the isolated probe by 500x and I divide the signal by two. Is that correct? I would appreciate an answer. Greetings
Thank you - excellent video, explained a lot and was a nice demo of the micsig. Just one comment, though, when talking about the Pi (and DC) I didn't see it mentioned explicitly if plugging that in via the DC jack or by plugging USB in via a wall socket or ground over HDMI through a TV - do any of these also create concerns?
Yes, basically any link from any PSU or HDMI ti ground would then be grounding the scope. This only only something that would be a concern when working on switching power supplies for instance.
The primary side of a switchmode power supplies is always referenced to earth, that's why it is marked as HOT on the print, and the secondary side marked as COLD. If the input side of the swithmode power supply has a earth connection, this earth connection is in most of the swithmode power supplies straight through connected to the minus of the secundary output. This is the case with notebook supplies that have a earth pin on the input, and with ALL ATX desktop power supplies. There is only 1 exception, and that is if you power a switchmode power supply from a isolation transformer, then the primary is not earth referenced.
Why does nobody suggest getting cheap battery powered scopes (handheld scopes). I just got myself a cheap one exactly for that reason. It doesnt need to be a good scope with amazing specs. Just a 10-50Mhz scope that runs on batteries. Perfect for probing power supplies anywhere you like. As you mostly just read values of mabye a few hundred kHz, it is more than enough to be accurate enough. And most of that handheld scopes are cheaper than any of these probes. Of course you still should be careful as your leads will be on mains but at least you wont blow up your expensive bench oscilloscope nor blow anything else up. Just dont touch the leads (which is obvious) and you are good to go.
not exactly. The isolation between primary and secondary sides of the transformer of the power supply of oscilloscope may not be able to bear the voltage as high as a high voltage differential probe which usually works on hundreds to thousands volts. And the capacitance between the primary and secondary sides of the transformer of the power supply of oscilloscope is so high that it can be considered as "short" to high frequency signal. I think using a UPS on battery mode (turning on and unplugged from wall socket) to power the oscilloscope might be a proper alternative option of using a differential probe, or simply use a handheld oscilloscope on battery mode.
Thank you for sharing your knowledge -awesome video. Best MicSig review on You Tube and only person to mention the Isolation Transformer. I learn a lot, thanks
I purchased in in USA, but using in India. Though, it was slightly higher than my budget, I really like this investment, as I frequently work on flyback converter and induction cooker circuits, which works on mains voltage. I have been using this probe for past 2 years and there is no issue till date.
Thanks for the review!
At 7:28, the point at emitter of the opto-isolator, which is the reference point of the hot-side, is not "Earth" and should NOT be directly connected to the "Earth" (GND) of the oscilloscope 😱. Otherwise, it will go BANG. The reason is because the circuit is using a full-wave rectifier. But, if was a half-wave rectifier, then it should be okay.
Not isolated, but high resistance between probe and scope.
Wrong, it is isolated from the scope as the circuitry of the probe generates a low voltage signal completely isolated. Watch the eevblog teardown if you don't understand what the differential electronics are doing. He explains the mechanics very well.
@@PurityVendetta was there an isolation transformer inside the probe ?
@@PurityVendetta It’s kind of funny that you refer to EEVblog, because what Dave Jones is saying in his teardown is that the probes are NOT isolated. He even measures with a DMM between the probe tips and ground to demonstrate this in his teardown video.
Might I mention that if you are powering a device like an arduino using a usb lead from a computer there is a direct reference to mains ground through the usb ground. Worth bearing in mind.
Does anyone know whether Micsig have solved the common mode rejection issues that were found with the DP0007?
Nice video. Thanks!
batman will not leave the cave without his bat-belt-differential-probe...👍 👍 lots of evil signals, it's a no joker... 😊 thanks and just what i need for my non-insulated bench scope 👍
Hi, I am just getting into electronics repair, more specifically, car audio amplifier repair, ranging from 18wrms-1000wrms. I know I need an Oscope but there are so many out there and I am not educated enough on the equipment to know what I need or don't need. I know I want one that would have a similar response that a CRT display would have. I say this because I heard there is an input lag with an LCD display which the CRT display does not have. My budget is around $750 and I want an Oscope that will do everything because I don't want to have to upgrade later down the road.
If using a tablet oscilloscope (i.e. battery powered) would it work without isolation ? Also here in Oz we have 240vac .. Could you use the supplied 10x probe to view a 240v generator output ? (Scope Vmax = 400v) . . . Or do we need to factor the Volts peak to peak (and need a 100x probe) ? Thanks for ur awesome videos 👍🏼👍🏼👍🏼
Perfect explanation
Glad it was helpful! Thanks :)
Sir, thank you for this video. I have this probe but haven't had the nerve to use it as I've been working on DC. However, I would like to test the output of my APC 1500 sinewave UPS. My plan is to unplug it and everything from it, connect the Dp10013 to the hot and neutral of tthe battery powered receptacle to see if it is an actual sinewave. I've watched other videos which don't use a diff probe or isolation transformer and it scares the snitzel out of me.
Can I use my scope plugged into mains and measure DC voltage from my car? Or do I need a battery operated scope to do that?
Why not use a battery powered inverter to power the SMPS you are working on and probing? In that case the SMPS is not referenced to the Earth in your home and therefore not the one referenced in your oscilloscope. In which case you would not need differential probes? Or am I missing something?
Should I be buying the Micsig DP10013 or the new model MDP1500 in year 2024/2025?
Many Thanks
Hi friend.
I have a question. Is this probe necessary to work with 220ac input switching sources?
I tell you because there is a previous model.
If so, I have to set the oscilloscope scale by 1000x (mine does not have 500x), the isolated probe by 500x and I divide the signal by two. Is that correct?
I would appreciate an answer.
Greetings
A differential probe is NOT ISOLATED. It's a very high impedance differential probe and both leads are always referenced in to oscilloscope ground!
Thank you - excellent video, explained a lot and was a nice demo of the micsig. Just one comment, though, when talking about the Pi (and DC) I didn't see it mentioned explicitly if plugging that in via the DC jack or by plugging USB in via a wall socket or ground over HDMI through a TV - do any of these also create concerns?
Yes, basically any link from any PSU or HDMI ti ground would then be grounding the scope. This only only something that would be a concern when working on switching power supplies for instance.
How about USB oscilloscopes used with a laptop that is not connected to mains?
my usb scope and laptop went bad when i was checking smps power supply
Hi great video.....I was looking into her one of this ..thx
Primary side of switchmode power supplies is never referenced to earth. The secondary side however, can be.
The primary side of a switchmode power supplies is always referenced to earth, that's why it is marked as HOT on the print,
and the secondary side marked as COLD.
If the input side of the swithmode power supply has a earth connection, this earth connection is in most of the swithmode power supplies straight through connected to the minus of the secundary output.
This is the case with notebook supplies that have a earth pin on the input, and with ALL ATX desktop power supplies.
There is only 1 exception, and that is if you power a switchmode power supply from a isolation transformer, then the primary is not earth referenced.
Why does nobody suggest getting cheap battery powered scopes (handheld scopes). I just got myself a cheap one exactly for that reason. It doesnt need to be a good scope with amazing specs. Just a 10-50Mhz scope that runs on batteries. Perfect for probing power supplies anywhere you like. As you mostly just read values of mabye a few hundred kHz, it is more than enough to be accurate enough.
And most of that handheld scopes are cheaper than any of these probes.
Of course you still should be careful as your leads will be on mains but at least you wont blow up your expensive bench oscilloscope nor blow anything else up. Just dont touch the leads (which is obvious) and you are good to go.
🇳🇱nl🤪🤪🤪🤪🤪🤪🤪👍👍👍👍👍👍👍👍👍👍👍👍👍👍😀😀😀😀😀😀😀😀
Or basically cut the earth wire.. and the problem is solved :)
not exactly. The isolation between primary and secondary sides of the transformer of the power supply of oscilloscope may not be able to bear the voltage as high as a high voltage differential probe which usually works on hundreds to thousands volts. And the capacitance between the primary and secondary sides of the transformer of the power supply of oscilloscope is so high that it can be considered as "short" to high frequency signal. I think using a UPS on battery mode (turning on and unplugged from wall socket) to power the oscilloscope might be a proper alternative option of using a differential probe, or simply use a handheld oscilloscope on battery mode.
You did a parking lot of errors