Double-check all the connections to ensure that there are no shorts or loose connections. Testing the Circuit Connect the 5V DC power supply to the input terminals. Measure the output voltage using the multimeter to ensure that it reaches the desired value (e.g.,, 24V). Adjust the duty cy...
6) On switching on the SMPS, if the the bulb does not glow, it would probably indicate all's well and the unit has been repaired successfully. Now you can feel free to check the output voltage of the SMPS with a meter and confirm that it is producing the right readings. 7) Finally ...
Effective testing of a power supply requires far more than just connecting it to a PC and using a $10 multimeter to check the voltage rails. At the very least, it requires specialized (and very expensive) equipment. At this point, most people that actually know a few things about PSUs w...
So it is more like using a sufficiently large window (low deflection speed) to get averaging for the build in RMS calculation. One might have to check the DSO - which are the correct setting and maybe take into account the DSOs own noise. Be real careful about using automatic RMS measurem...