| Products > Test Equipment |
| R&S HMP4040 voltage spike at PSU turn-off |
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| tautech:
--- Quote from: EEVblog on October 05, 2023, 04:57:55 am ---There was an error in the upload. But it displays ok for me now, time in the images is different. --- End quote --- Welcome to the attachment problems that have been plaguing us for years. It drives members nuts that this don't work as it should and that they need do things weird to work around it. |
| mawyatt:
Would expect the R&S representative to step in and comment, or at least acknowledge this issue. This isn't about an erroneous reading or measurement, but about potential damage to customers equipment/circuits under test :-- Have any folks with these defective Power Supplies contacted R&S? Best, |
| nctnico:
--- Quote from: EEVblog on October 05, 2023, 04:57:55 am --- --- Quote from: mawyatt on October 05, 2023, 03:03:51 am ---Is that the correct image with the 4 ohm load? It has the same time code and looks the same. --- End quote --- There was an error in the upload. But it displays ok for me now, time in the images is different. --- End quote --- Not at my end... Still seeing the same timestamps. |
| rf-messkopf:
My HMP4040 does not do that. See the attachment: 3V directly into the scope input, and then mains power off. It's a fairly recent unit, bought in 2019, if I recall correctly. I vaguely remember that there was a recall or a firmware update due to this issue. Read about that in a German electronics forum. Maybe a R&S representative can provide some information about this. |
| pdenisowski:
--- Quote from: mawyatt on October 07, 2023, 10:01:03 pm ---Would expect the R&S representative to step in and comment, or at least acknowledge this issue. --- End quote --- Sorry, didn't notice this thread until now. I'm personally unaware of this issue and don't have one of these in my office right now, so let me check with the product line. Has anyone here contacted R&S support about this issue? Will post an update as soon as I have one. |
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