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| New Rigol DS1054Z oscilloscope |
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| RoGeorge:
Mine (with FW v00.04.05.SP2) has on the left side of the screen a button for 'Vrms' and one for 'Variance', but no 'AC.Vrms'. What is 'AC.Vrms', or what's the difference between 'Vrms' and 'AC.Vrms'? |
| Njk:
Vrms takes into account AC+DC voltages. AC.Vrms ignores DC offset. The help info is also updated accordingly. |
| iMo:
That is a good fix, as the older version of Vrms does Vrms with the DC offset calculated in. Now the AC.Vrms (with DC coupling and DC offset) perhaps calculates the stddev basically. |
| Njk:
AC.Vrms seems working properly. Stddev is what was previously named Variance (according to its definition by the equation 6-4 in the manual. That is hinted by the tiny D letter in its icon). It's not a measured value, it's a meta data that can be displayed in the statistical information for every item. That's why it was weird to see a dedicated icon for stddev. Now it's actually removed. |
| Pierre_Montreal:
I have the DS1054z Software version: 00.04.05.SP2 and I am able to clear these grayed measurements by changing the font size ! It seems that when the scope change the font size it clear the measurements and it the redraw them. Try it. |
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