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Why doesn't my RMS multimeter agree with my Rigol 1054Z scope on the AC VRMS?

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2N3055:
Quite a discussion about something without basic data: type of sig-gen and details on settings, and complete lack of ANY information on scope and it's settings.

joeqsmith:

--- Quote from: 2N3055 on August 10, 2023, 01:31:45 pm ---Quite a discussion about something without basic data: type of sig-gen and details on settings, and complete lack of ANY information on scope and it's settings.

--- End quote ---
I was guessing AI generated on many of the 1st time posters like this one.

2N3055:

--- Quote from: joeqsmith on August 10, 2023, 02:01:54 pm ---
--- Quote from: 2N3055 on August 10, 2023, 01:31:45 pm ---Quite a discussion about something without basic data: type of sig-gen and details on settings, and complete lack of ANY information on scope and it's settings.

--- End quote ---
I was guessing AI generated on many of the 1st time posters like this one.

--- End quote ---
You're probably right..

Datman:
A month ago I wrote to Rigol:

"On the DS1054Z I noticed that RMS value is wrong if I apply a square wave and duty cycle if different from 50%! If I select AC for the input, it seems to be OK, but if I select DC the value is wrong and it doesn't change when I adjust the duty cycle!

In AC, the value changes if I change the frequency of the square wave, displaying 2 or 10 or 20 or more waves. The scope should calculate RMS only on complete waves...

Can you verify?"

They asked Zhou Lihui to verify...

Datman:
I found something from 2015:  :(
http://www.sonsivri.to/forum/index.php?topic=60363.0

(...) "Not sure if I will be able to convince them about changing the way calculations are done to match what tektronix and agilent do, but I'll try"

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