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| Measuring power supply ripple with Siglent 1202X-E |
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| Martin72:
Here is a short paper concerning ripple measurements, mainly on switching power supplies. |
| MarioBros69:
--- Quote from: Martin72 on September 03, 2023, 07:25:12 pm ---Here is a short paper concerning ripple measurements, mainly on switching power supplies. --- End quote --- Thank you for the document..., it is very interesting |
| tautech:
--- Quote from: MarioBros69 on September 03, 2023, 05:57:18 pm ---Do you mean that since the oscilloscope is portable and not connected to 220v, I will no longer have noise when taking the measurement? --- End quote --- Let's look a little harder at this particular measurement. It's a linear PSU with isolated channels however there is provision to tie any output to mains Gnd: (middle terminal) When doing so the antenna effect of a probe reference lead is much reduced as this places the reference lead at the same mains ground potential and noise should be substantially reduced. Screenshots please when you get your SDS1104X-E. :popcorn: |
| MarioBros69:
--- Quote from: tautech on September 04, 2023, 07:07:37 am --- --- Quote from: MarioBros69 on September 03, 2023, 05:57:18 pm ---Do you mean that since the oscilloscope is portable and not connected to 220v, I will no longer have noise when taking the measurement? --- End quote --- Let's look a little harder at this particular measurement. It's a linear PSU with isolated channels however there is provision to tie any output to mains Gnd: (middle terminal) When doing so the antenna effect of a probe reference lead is much reduced as this places the reference lead at the same mains ground potential and noise should be substantially reduced. Screenshots please when you get your SDS1104X-E. :popcorn: --- End quote --- Do you mean that I should connect the negative of the oscilloscope probe to the ground terminal and the positive of the probe to the positive terminal? I have doubts about the purchase, now someone tells me that instead of the 1104X-E I should spend a little more and buy the Rigol MSO5074 The more I read the more doubts Thanks |
| tautech:
--- Quote from: MarioBros69 on September 04, 2023, 01:06:52 pm --- --- Quote from: tautech on September 04, 2023, 07:07:37 am --- --- Quote from: MarioBros69 on September 03, 2023, 05:57:18 pm ---Do you mean that since the oscilloscope is portable and not connected to 220v, I will no longer have noise when taking the measurement? --- End quote --- Let's look a little harder at this particular measurement. It's a linear PSU with isolated channels however there is provision to tie any output to mains Gnd: (middle terminal) When doing so the antenna effect of a probe reference lead is much reduced as this places the reference lead at the same mains ground potential and noise should be substantially reduced. Screenshots please when you get your SDS1104X-E. :popcorn: --- End quote --- Do you mean that I should connect the negative of the oscilloscope probe to the ground terminal and the positive of the probe to the positive terminal? --- End quote --- That's what happens if you ground (link center terminal) the negative side of the PSU output. Passive probes don't have negatives and positives, the reference lead is always at mains ground potential in all scopes except isolated channel versions. --- Quote ---I have doubts about the purchase, now someone tells me that instead of the 1104X-E I should spend a little more and buy the Rigol MSO5074 --- End quote --- If you want to see even more noise at low signal levels the 5074 has substantially more system noise that excludes it from precise low level measurements. --- Quote ---The more I read the more doubts --- End quote --- Good, members knowledge can help you understand and grow. |
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