Hi. I just got a task to calibrate all our power supplies, because one of our visiting customer wasn't happy with the "NOT CALIBRATED" stickers on them. Sending them out for cal would be quite pricey, probably scrapping them would be cheaper. So I'll attempt to calibrate it in-house.
The DUT is nothing fancy, U8001A power supply for example, 30V 3A, linear. And a bunch of similar supplies.
My plan was to place 2x 34465A parallel + series with the output, route it into a DC load (Keithley 2380) and verify DC ranges, CC and CV.
However when I checked the user manual of the power supply, there are extra steps to verify CV, CC noise. And step response.
https://www.keysight.com/nl/en/assets/9018-02142/user-manuals/9018-02142.pdf?success=trueThey also use a 100MHz differential amplifier, which is about 6KEUR, and the only reason to use it is to AC couple the signal and a gain of 10? And an RMS voltmeter... Seems a bit excessive to just measure the 1mV noise specification.
How would you do a basic check for a power supply noise specification? Am I thinking about this too much, just place a MSO on it and measure the RMS?