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Time Interval Error 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 differences between the positions in time of waveform level crossings and the times at which the corresponding level crossings occur in the reference clock.

Examples

data in contains information about the data bit sequence between transitions in a waveform. You can use the Clock Recovery (Mean Clock) VI to generate this cluster.
bit count specifies the number of bits between successive transitions in the waveform.
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.
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.
ref level crossings specifies information about the locations of level crossings in the reference clock waveform. You can use the Clock Recovery VIs to generate this cluster from a measured waveform.
t0 specifies the time at which the first sample occurs in the clock signal.
dt specifies the time interval in seconds between the individual samples in the clock signal.
indexes contains the index numbers of the samples in the clock signal 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 clock signal 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.
data out returns information about the data bit sequence between transitions in the waveform.
bit count returns the number of bits between successive transitions.
slope returns whether the direction of the transition is rising or falling.

-1Falling Edge—The transition is a falling edge, or one with a negative slope.
1Rising Edge (default)—The transition is a rising edge, or one with a positive slope.
TIE sequence returns the time interval error measurements.
TIE 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 returns the index numbers of samples in the measured waveform that fall on the crossing level.
error out contains error information. This output provides standard error out functionality.

Examples

Refer to the following VIs for examples of using the Time Interval Error VI:

  • Rj Dj Separation VI: labview\examples\Jitter Analysis\Jitter Measurements
  • Rj Dj Delta Delta Separation VI: labview\examples\Jitter Analysis\Jitter Measurements

 

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