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Level VIs

LabVIEW 2012 Jitter Analysis Toolkit Help

Edition Date: June 2012

Part Number: 373270B-01

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Owning Palette: Jitter Analysis VIs

Requires: Jitter Analysis Toolkit. This topic might not match its corresponding palette in LabVIEW depending on your operating system, licensed product(s), and target.

Use the Level VIs to perform amplitude and level measurements on a signal and to identify positions in time of waveform features.

Example

The Level VIs are useful both before and after you perform jitter measurements. For example, before you can measure jitter, you use the Reference Levels and Find Transitions VIs to identify positions in time of waveform features, such as edges. After you identify jitter in a waveform, you can use other Level VIs to measure additional aspects of signal integrity.

Palette ObjectDescription
AreaMeasures the areas and mean voltages of unit intervals in a waveform. Wire data to the waveform input to determine the polymorphic instance to use or manually select the instance.
Find TransitionsMeasures the boundaries and directions of each transition in a waveform given the reference levels you specify. Wire data to the waveform input to determine the polymorphic instance to use or manually select the instance.
Max and Min VoltageMeasures the maximum and minimum voltages in the portions of a waveform between transitions. Wire data to the waveform input to determine the polymorphic instance to use or manually select the instance.
Overshoot and UndershootMeasures the times, locations, and amounts by which a waveform rises above and falls below a state level before or after a transition. The rise above a state level is known as overshoot, and the drop below a state level is known as undershoot. Wire data to the waveform input to determine the polymorphic instance to use or manually select the instance.
Peak-to-Peak VoltageMeasures the differences between the peaks, or highest and lowest values, in waveform cycles. Wire data to the waveform input to determine the polymorphic instance to use or manually select the instance.
Reference LevelsComputes reference levels based on an input waveform or on state levels computed before this VI runs. LabVIEW uses the reference levels to define the boundaries of edges in waveforms. Wire data to the state levels settings input and the waveform input to determine the polymorphic instance to use or manually select the instance.
Root Mean Square VoltageMeasures 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.
State LevelsComputes the high and low state levels of a waveform and the corresponding amplitude. You can use state levels to identify the position in time of a waveform feature to be measured. Wire data to the waveform input to determine the polymorphic instance to use or manually select the instance.

Example

Refer to the Overshoot Demo VI in the labview\examples\Jitter Analysis\Level Measurements directory for an example of using the Level VIs.


 

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