Products > Test Equipment
New MicSig/EEVblog DP10007 HV Differential Probe
mrprecision:
I have shorten the inputs of the probe for the setting 10:1. I see some coupling from there DC/DC converter inside the diffprobe. I bought the probe at Bartonix, they could measure the same effect with my probe and with other probes of this type. They got some newer ones and there it is much better. I have two probes which are find now. I use this mostly for lower signals as a diffprobe, not mainly for higher voltages.
The noise of the 10:1 probe is lower than on the other Micsig probes. If you don't zoom in too much in the x-axis, you would think that the probe has higher noise...
ExaLab:
--- Quote from: mrprecision on July 27, 2021, 09:21:04 pm ---I have shorten the inputs of the probe for the setting 10:1. I see some coupling from there DC/DC converter inside the diffprobe. I bought the probe at Bartonix, they could measure the same effect with my probe and with other probes of this type. They got some newer ones and there it is much better. I have two probes which are find now. I use this mostly for lower signals as a diffprobe, not mainly for higher voltages.
The noise of the 10:1 probe is lower than on the other Micsig probes. If you don't zoom in too much in the x-axis, you would think that the probe has higher noise...
--- End quote ---
Ok, now I remember the inconvenience you encountered ... Just for comparison, can you post the noise acquisition for the new probe (i.e. the replacement...) you received?
EEVblog:
--- Quote from: mrprecision on July 27, 2021, 09:21:04 pm ---I have shorten the inputs of the probe for the setting 10:1. I see some coupling from there DC/DC converter inside the diffprobe. I bought the probe at Bartonix, they could measure the same effect with my probe and with other probes of this type. They got some newer ones and there it is much better. I have two probes which are find now. I use this mostly for lower signals as a diffprobe, not mainly for higher voltages.
The noise of the 10:1 probe is lower than on the other Micsig probes. If you don't zoom in too much in the x-axis, you would think that the probe has higher noise...
--- End quote ---
I don't recall seeing that on mine.
Unusual that you'd see that as a fault on one unit.
mrprecision:
Noise measurement of two different DP10007 Probes (x10)
I measured the noise around 12.7mVrms of both probes (inputs shorten, attenuation x10, standard deviation). The datasheet shows a value of (max) 15mVrms. So the noise is within the specs. The noise of the DP10007 is much lower than on the other the two MicSig probes. The good thing on the DP10007 is the low attenuation (x10) which is the same like for the standard scope probes. For low voltage and regular power line voltages the DP10007 is out of my point of view the best choice.
ExaLab:
Ok, but my question was related to the 90KHz noise effect you had with the old DP10007 probe for which you have requested replacement.
The new one you received as a replacement does it have a similar behavior? In other words, setting the timebase to 2uS are you able to trigger and to see the same 90KHz noise in the new one too?
If yes, can you post a screenshot of this 90KHz noise?
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