Products > Test Equipment

Power supply for home lab - do I really need a R&S?

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pdenisowski:

--- Quote from: mhsprang on October 03, 2024, 08:24:45 am ---I will send all of this to R&S and see what they have to say. This behaviour is unacceptable for a reputable brand as R&S.
@Anyone from R&S on this forum: feel free to comment...

--- End quote ---

Thanks everyone for the posts and information.  I've passed this on to our product management and R&D folks for power supplies and we're investigating.  If you haven't already, please also submit this to your local technical support team and R&S account manager / distributor.  I'll post updates as I have them.

pdenisowski:
I'm also posting the relevant specifications

https://scdn.rohde-schwarz.com/ur/pws/dl_downloads/dl_common_library/dl_brochures_and_datasheets/pdf_1/service_support_30/NGE100_bro_en_5214-8748-12_v0101_96dpi.pdf

rsjsouza:
My Keysight E36312A has settings to delay the overcurrent protection "OCP Start" and "OCP Delay Start" - perhaps there is a similar configuration in the R&S supply that might be overloading the output?

mhsprang:

--- Quote from: rsjsouza on October 03, 2024, 01:03:57 pm ---My Keysight E36312A has settings to delay the overcurrent protection "OCP Start" and "OCP Delay Start" - perhaps there is a similar configuration in the R&S supply that might be overloading the output?

--- End quote ---
There is no such setting on the NGE100 series. Only a settable ramp up, which does not solve it. See reply #38 (four upwards).

rsjsouza:
Similar response on the E36312A with various settings

(Edit to avoid confusion in the future) In this particular case, a 47 ohm resistor was placed in the output of channel 3 (set to 20V and 10mA). The curve was generated when the "output enable" button was pressed.






--- Quote from: mawyatt on October 03, 2024, 12:28:36 am ---
--- Quote from: mhsprang on October 02, 2024, 08:33:08 pm ---I think it's a software loop. The flat top and decay time (see image) are always exactly the same length, no matter the set voltage or current.

--- End quote ---

That's totally unacceptable behavior from any supply, it's a disaster in the waiting for just about any sensitive electronics use we can think of.

Here's an inexpensive SPD3303X with settings of 20V and 10mA with a Blue LED similar setup and PS settings. Note the DSO Vertical and Horizontal scales, 500mV/Div -2V Offset at 50ms/div.

Best,

--- End quote ---

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