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Root Mean Square Voltage VI

LabVIEW 2012 Jitter Analysis Toolkit Help

Edition Date: June 2012

Part Number: 373270B-01

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Owning Palette: Level VIs

Requires: Jitter Analysis Toolkit

Measures the RMS values of unit intervals in a waveform. Wire data to the waveform input to determine the polymorphic instance to use or manually select the instance.

Use the pull-down menu to select an instance of this VI.

Root Mean Square Voltage (DBL)

This instance operates on the waveform data type when the Y data values are double-precision, floating-point numeric values. Use the I8 instance of this VI with integer data to reduce the size of the data and the memory usage.

waveform is the waveform to measure.
t0 specifies the start time of the waveform.
dt specifies the time interval in seconds between data points in the waveform.
Y specifies the data values of the waveform.
level crossings contains information about the locations of level crossings in the original waveform. You can use the Level Crossing VI to generate this cluster.
t0 specifies the time at which the first sample occurs in the original waveform.
dt specifies the time interval in seconds between the individual samples in the original waveform.
indexes contains the index numbers of the samples in the waveform with values that fall at the crossing level.
slope identifies the direction of the first transition in the waveform.

-1Falling Edge—Specifies the transition is a falling edge, or one with a negative slope.
1Rising Edge (default)—Specifies the transition is a rising edge, or one with a positive slope.
crossing level specifies the value of the waveform at each of the samples in indexes.
error in describes error conditions that occur before this node runs. This input provides standard error in functionality.
rising/falling specifies the direction of the transition at which to begin the measurement. This VI begins measuring at the first transition of that direction in the waveform.

–1Falling Edge—Specifies to begin measuring at the first falling edge in the waveform.
1Rising Edge (default)—Specifies to begin measuring at the first rising edge in the waveform.
Vrms sequence is an array of the RMS values for each unit interval in the waveform.
Vrms timestamps returns timing information about the waveform that allows you to identify the times at which measurements in the corresponding sequence occur.
t0 returns the time at which the first sample occurred in the original waveform.
dt returns the time interval in seconds between the individual samples in the original waveform.
indexes contains the index numbers of the waveform samples that fall on the crossing level in the direction specified by rising/falling and that mark the beginning of a complete cycle.
error out contains error information. This output provides standard error out functionality.

Root Mean Square Voltage (I8)

This instance operates on the waveform data type when the Y data values are 8-bit signed integers.

waveform is the waveform to measure.
t0 specifies the start time of the waveform.
dt specifies the time interval in seconds between data points in the waveform.
Y specifies the data values of the waveform.
level crossings contains information about the locations of level crossings in the original waveform. You can use the Level Crossing VI to generate this cluster.
t0 specifies the time at which the first sample occurs in the original waveform.
dt specifies the time interval in seconds between the individual samples in the original waveform.
indexes contains the index numbers of the samples in the waveform with values that fall at the crossing level.
slope identifies the direction of the first transition in the waveform.

-1Falling Edge—Specifies the transition is a falling edge, or one with a negative slope.
1Rising Edge (default)—Specifies the transition is a rising edge, or one with a positive slope.
crossing level specifies the value of the waveform at each of the samples in indexes.
error in describes error conditions that occur before this node runs. This input provides standard error in functionality.
rising/falling specifies the direction of the transition at which to begin the measurement. This VI begins measuring at the first transition of that direction in the waveform.

–1Falling Edge—Specifies to begin measuring at the first falling edge in the waveform.
1Rising Edge (default)—Specifies to begin measuring at the first rising edge in the waveform.
Vrms sequence is an array of the RMS values for each unit interval in the waveform.
Vrms timestamps returns timing information about the waveform that allows you to identify the times at which measurements in the corresponding sequence occur.
t0 returns the time at which the first sample occurred in the original waveform.
dt returns the time interval in seconds between the individual samples in the original waveform.
indexes contains the index numbers of the waveform samples that fall on the crossing level in the direction specified by rising/falling and that mark the beginning of a complete cycle.
error out contains error information. This output provides standard error out functionality.

 

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