The CMRR is the heart of a differential probe.
It is much more important than bandwidth and this heavy limitation (CMRR close to -20dB @ 10MHz) of the probe is absolutely not negligible!
I think (but I'm not sure) that I have identified the cause of this problem. I will try to fix it soon.
I hope micsig is kind enough to let me have a new front label to replace the one I had to remove
I've been informed by Micsig that a new version of the DP10007 is coming shortly, presumably to fix the CMRR issue I raised.
Any information available on this "new and improved" version of the DP10007 probe?
E.g. is the updated version currently being shipped Micsig?
Any information of serial number cut-over, or other way to identify new variant?
The CMRR at HF of a differential probes is going to be bad no matter what you do, it may be a bit better than bad, but still bad. For line frequency work they are fine but for measuring low voltage floating signals in power electronics only fiber isolated probes make sense.
I bought a differential probe, $1150，but I haven't received it yet.
The manufacturer describes it to use “RF isolation”，so it has a good HF CMRR。
But the differential input voltage is low, I used to test the LLC Half-bridge GaN drive signal should be ok.
Regarding "RF isolation", I guess it may be magnetic coupling isolation。
Bandwidth：50 MHz
Attenuation：2x, 20x
Total range (DC+ACpp)：3 V (2X)，30 V (20X)
Max input voltage (compared to ground)：±1500 V
Noise：5mV（2X），50mV（20X）
CMRR（2X）：
-140 dB (100 Hz)
-120 dB (1 MHz)
-85 dB (10 MHz)
-60 dB (50 MHz)
I received the differential probe mentioned above.
The following figure shows the key waveforms used to test the LLC resonant half-bridge,
CH1: Half-bridge voltage, CH2: LS_GATE, CH3: HS_GATE, CH4: resonant current
HF CMMR is not bad，But the differential input voltage is only ±30V ！ I am worried that it will be damaged！
I've been meaning to get a set of Differential Probes for ages, my use case for these is repairing equipment where a differential probe is needed due to voltage levels and mains references. Not for low voltage use (I have other equipment for that)
With that in mind I'd settled on getting a set of the EEVblog HVP70 different probes which just about fit in the voltage range I need for the moment and figured I'd get a higher voltage set later on. I couldn't find these for sale anywhere currently (Certainly no where in the UK)
I saw a few videos on the McSig DP10007's and DP10013's and Dave's video and figured I'd get one of these and was torn between the two models, also noticed that the DP10007/DP1013 are on sale with McSig branding or no branding. I did wonder if they were the same thing or clones. Has anyone else seen these, Amazon and eBay are flooded with them?
While I was looking I found a new set of Tektronix P5200A's for not much more than the McSig DP10007's so I bought them.
Now I'm in a quandary about what to do, I can find very little information on the Tek P5200A's on here and how they compare to the McSig's offering.
I was a bit put off with what I've read about the current batch of DP10007's and was going to hang on till the issue is sorted or hopefully Dave does a EEVblog rebrand of one with any issues addressed.
The P5200A's have arrived with me today and I looked at them and wondering what to do, shall I use them and enjoy them, or sell them and get something else. I had no idea what the RRP was on them till I started looking for reviews after I'd bought them, are they just overpriced or will they be any better than the offerings from McSig or similar. I must say the detachable leads appeal and the Fluke clips etc they came with look really nice.
Really interested to know what's in the pipeline for any EEVblog branded differential probes.
With that in mind I'd settled on getting a set of the EEVblog HVP70 different probes which just about fit in the voltage range I need for the moment and figured I'd get a higher voltage set later on. I couldn't find these for sale anywhere currently (Certainly no where in the UK)
Just sold out the other day. New stock not due until early January.
Micsig have not gotten back to me on the issue, so I'm continuing to order and stock the trusted HVP70.
With that in mind I'd settled on getting a set of the EEVblog HVP70 different probes which just about fit in the voltage range I need for the moment and figured I'd get a higher voltage set later on. I couldn't find these for sale anywhere currently (Certainly no where in the UK)
Just sold out the other day. New stock not due until early January.
Micsig have not gotten back to me on the issue, so I'm continuing to order and stock the trusted HVP70.
I get the impression MicSig are not the OEM from what I've seen. Not good they haven't got back to you about the issue, even something out of courtesy to say they are looking in to it would have been good considering the amount of exposure MicSig are getting on here.
That's good news you are continuing with the Sapphire based probes and I'll pick the HVP70 up when it comes back in stock.
I get the impression MicSig are not the OEM from what I've seen.
What gives you that idea? My spidey sense hasn't indicated that.
That's good news you are continuing with the Sapphire based probes and I'll pick the HVP70 up when it comes back in stock.
I'll post on here once back in stock. I was surprised by the popularity of my last batch, sales were much higher than previously.
They are having component shortage issues and I had to commit to a higher than desired minimum order to get it happening. They had another dealer who would only pony up 20% of the MOQ required (under their own brand, not mine), so I had to agree to cover the other 80%. So it seems like I'm currenlty 80% of the world market for this probe
What gives you that idea? My spidey sense hasn't indicated that.
The market is flooded with DP10013 and DP1007 differential probes, but with what appears to be no branding. And look identical to the MicSig differential probes. And that the DP10013 is available for £88 delivered inc tax, they were even cheaper the other day as there is often a discount voucher on the item as well.
These all mainly seem to be sold by sellers from the far east on Amazon and eBay with made random names and these don't really fit with the other items they are selling.
Whether these are clones of MicSig, possible but I doubt. Or are just made by another OEM and they will put a brand on the front.
It's the same story with the DP10007s. I haven't searched for the other models.
I was sorely tempted to order the cheapest of the DP10013's and see what branding they turn up with and if they are the same.
I'll post on here once back in stock. I was surprised by the popularity of my last batch, sales were much higher than previously.
They are having component shortage issues and I had to commit to a higher than desired minimum order to get it happening. They had another dealer who would only pony up 20% of the MOQ required (under their own brand, not mine), so I had to agree to cover the other 80%. So it seems like I'm currenlty 80% of the world market for this probe
That's absolutely crazy, just goes to show how many the other companies are selling. And I can see why they have been so popular for quality and price they cannot be touched.
What gives you that idea? My spidey sense hasn't indicated that.
The market is flooded with DP10013 and DP1007 differential probes, but with what appears to be no branding. And look identical to the MicSig differential probes. And that the DP10013 is available for £88 delivered inc tax, they were even cheaper the other day as there is often a discount voucher on the item as well.
These all mainly seem to be sold by sellers from the far east on Amazon and eBay with made random names and these don't really fit with the other items they are selling.
The funny thing is that I was the one that requested they design the DP10007 and helped them test it, and yet here I am not selling it and everyone else is
I asked for custom branding on the Micsig current probes but they said my volume wasn't high enough.
Whether these are clones of MicSig, possible but I doubt. Or are just made by another OEM and they will put a brand on the front.
Would be interesting to find out.
That's absolutely crazy, just goes to show how many the other companies are selling. And I can see why they have been so popular for quality and price they cannot be touched.
Yeah, these aren't something that sell in big volume, and margins are not great, they are expensive to buy wholesale.
I think I'm also one of the biggest Brymen dealers in the world for the 235.
FYI, I've asked Micsig about the possibility of counterfeits and the OEM thing.
FYI, I've asked Micsig about the possibility of counterfeits and the OEM thing.
It will be interesting to know their response.
Attached a screenshot of the current price in the UK.
Hi
From the picture, they even do not put the brand. It is said that they just put low price to cheat..
please take care of the wallet.
FYI, I've asked Micsig about the possibility of counterfeits and the OEM thing.
They are not our OEM customers. And we even do not know who they are.
From the picture, they just remove the brand and put a lower price in the internet. and they are not even a copy..
There are too many online shop sellers who make the same thing....
FYI, I've asked Micsig about the possibility of counterfeits and the OEM thing.
It will be interesting to know their response.
Attached a screenshot of the current price in the UK.
They are fake. do not believe them. we do not know who they are.
Hi
From the picture, they even do not put the brand. It is said that they just put low price to cheat..
please take care of the wallet.
I don't quite understand what you mean about the low price to cheat?
FYI, I've asked Micsig about the possibility of counterfeits and the OEM thing.
It will be interesting to know their response.
Attached a screenshot of the current price in the UK.
They are fake. do not believe them. we do not know who they are.
How do you know they are fake, have you actually seen them? Maybe they are selling your brand or could they be made by the same OEM that you use?
I may order a set and do a teardown to see what is inside.
well those ones seem to have gone out of stock for the time being (at least from that particular amazon UK seller here in uk)
but i do agree that doing a teardown would be helpful to clear up any such ambiguities - either way!
well those ones seem to have gone out of stock for the time being (at least from that particular amazon UK seller here in uk)
but i do agree that doing a teardown would be helpful to clear up any such ambiguities - either way!
They were £77 a day or two ago, I went to grab them earlier and they have sold out.
As soon as they are back in stock fulfilled by Amazon I'll get some and have a look inside.
Hello everyone,
I have found (and read) all this MicSig topic, because I'm interested in buying the DP10007.
Since last posts, is there anyone who had some news about the fixed CMRR model of DP10007 ?
Also, I have actually (since some times now) a Rigol DS1052E crossflashed to DS1102E which works well, but I also check scope for changing it.
I have downloaded the full chart on the other topic to see which model I could buy, and I hesitate between the Siglent
SDS2202X-E SDS1202X-E and the Rigol DS1202Z-E.
Both seems similar..
So if anyone could give me any advices about these 2 models ...?
Thanks!
Edit: My bad
confusing the SDS1202X-E and the SDS2202X-E
and I hesitate between the Siglent SDS2202X-E and the Rigol DS1202Z-E.
Both seems similar..
They not.
SDS2202X-E is a 2 GSa/s DSO, 28 Mpts memory depth, Webserver, Bode plot etc.
and I hesitate between the Siglent SDS2202X-E and the Rigol DS1202Z-E.
Both seems similar..
They not.
SDS2202X-E is a 2 GSa/s DSO, 28 Mpts memory depth, Webserver, Bode plot etc.
Thank you for the reply !
Just saw that I mixed the name when I write them down from the chart...
So I have edited my post, the Siglent is the SDS1202X-E
and I hesitate between the Siglent SDS2202X-E and the Rigol DS1202Z-E.
Both seems similar..
They not.
SDS2202X-E is a 2 GSa/s DSO, 28 Mpts memory depth, Webserver, Bode plot etc.
Thank you for the reply !
Just saw that I mixed the name when I write them down from the chart...
So I have edited my post, the Siglent is the SDS1202X-E
Yes then quite similar but dig deep in their datasheets to see what they might have in common.
SDS1202X-E was released a few years earlier and still is a popular seller for us.
Yes then quite similar but dig deep in their datasheets to see what they might have in common.
SDS1202X-E was released a few years earlier and still is a popular seller for us.
Yes I saw that it was release somewhere in 2017.
I have bought last year the SPD3303X-E, it was my first Siglent product and I'm quite happy with it
And my actual (and old) Rigol works well too.
The SDS1202X-E and the DS1202Z-E are at exactly the same price here (in France).
But very few information/review on this Rigol model, whereas I saw everywhere this Siglent...
Even on the place where I have bought my power supply, the SDS1202X-E is marked as "best seller"...
So, as you say, I have to dig more to find which one will be the best for me