Technical data

Commands by Subsystem 5

Agilent InfiniiVision 5000 Series Oscilloscopes Programmer's Guide 331

:MEASure:VRMS

(see page 750)

Command Syntax

:MEASure:VRMS [<interval>][,][<source>]

<interval> ::= {CYCLe | DISPlay | AUTO}

<source> ::= {CHANnel<n> | FUNCtion | MATH}

<n>::={1|2|3|4}forthefour channel oscilloscope models

<n> ::= {1 | 2} for the two channel oscilloscope models

The :MEASure:VRMS command installs a screen measurement and starts a

dc RMS value measurement. If the optional source parameter is specified,

the current source is modified.

Query Syntax

:MEASure:VRMS? [<interval>][,][<source>]

The :MEASure:VRMS? query measures and outputs the dc RMS value of

the selected waveform. How the dc RMS value is measured depends on the

<interval> specification:

• If <interval> is CYCLe, the dc RMS value is measured on an integral

number of periods of the displayed signal. If less than three edges are

present, the measurement fails, and +9.9E+37 is returned.

• If <interval> is DISPlay, the dc RMS value is measured on all displayed

data points.

• If <interval> is AUTO or is not specified, the measurement attempts to

compute a value using the CYCLe interval. If less than three edges are

present, the measurement is computed using the DISPlay interval.

Return Format

<value> ::= calculated dc RMS value in NR3 format

See Also • "Introduction to :MEASure Commands" on page 290

• ":MEASure:SOURce" on page 315

NOTE

This command is not available if the source is FFT (Fast Fourier Transform).