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Duty Cycle Distortion VI

LabVIEW 2012 Jitter Analysis Toolkit Help

Edition Date: June 2012

Part Number: 373270B-01

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Owning Palette: Jitter VIs

Requires: Jitter Analysis Toolkit

Measures the duty cycle distortion in a waveform, or the amount by which the mean positive width of cycles differs from the mean negative width.

Duty cycle distortion is a type of deterministic jitter in which the clock generates positive pulses that are not equal to negative pulses.

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.
slope 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 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.
DCD (s) returns the amount by which the mean pulse duration of positive pulses differs from the mean pulse duration of negative pulses.
DCD (%) is the duty cycle distortion as a percentage of the mean cycle period. This VI computes the DCD (%) as (1/mean period × DCD (s) × 100).
error out contains error information. This output provides standard error out functionality.

 

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