Processing Express VIs
Owning Palette: LabVIEW SignalExpress™ Express VIs
Use the Processing Express VIs to filter, scale, resample, and average signals; apply windowing and perform arithmetic operations; and, interactively align two signals.
If a LabVIEW SignalExpress palette is empty or appears to be missing VIs, you are missing components that are not installed by LabVIEW SignalExpress. Reinstall the National Instruments Device Drivers DVD and include NI-DAQmx and Modular Instruments support.
The VIs on this palette can return general LabVIEW error codes.
| Palette Object | Description |
|---|---|
| Arithmetic (Frequency Domain) | Performs arithmetic operations on two signals. The available operations change depending on the type of the input signals you select. |
| Arithmetic (Time Domain) | Performs arithmetic operations on two signals. The available operations change depending on the type of the input signals you select. |
| Convert Analog to Digital | Converts an analog waveform to a digital waveform. |
| Convert Digital to Analog | Converts an input digital waveform into an analog waveform. |
| Filter | Filters a time signal using an infinite impulse response (IIR) or finite impulse response (FIR) filter. Use this step to remove or attenuate unwanted frequencies from a signal using various standard filter types and topologies. |
| Formula | Performs math operations on up to four input variables. By default, Formula processes only one variable, but you can place checkmarks in the Enable checkboxes to enable more variables. Enter a formula in the Formula field using the variable names you specify in the Alias fields to represent the Input variable values. |
| Interactive Alignment | Aligns two plots so you can compare them. You can align the Test signal in signal with the Ref. signal in signal manually by dragging and/or expanding the Test plot on the graph or by using algorithms to automatically align steps, pulses, or periodic parameters. |
| Scaling and Conversion (Frequency Domain) | Performs gain and offset scaling on a time signal, gain scaling on a frequency-domain magnitude signal, or time-delay correction on a frequency-domain phase signal. |
| Scaling and Conversion (Time Domain) | Performs gain and offset scaling on a time signal, gain scaling on a frequency-domain magnitude signal, or time-delay correction on a frequency-domain phase signal. |
| Subset and Resample (Frequency Domain) | Extracts a subset of an input signal using the Start frequency and Subset length you specify or resamples an input signal using the frequency interval (df) you specify. If you specify a larger df, Subset and Resample downsamples the signal. If you specify a smaller df, Subset and Resample upsamples the signal. |
| Subset and Resample (Time Domain) | Extracts a subset of an input signal using the Start position and Subset length you specify or resamples an input signal using the time interval (dt) you specify. If you specify a larger dt, Subset and Resample downsamples the signal. If you specify a smaller dt, Subset and Resample upsamples the signal. |
| Time Averaging | Performs time averaging on a time signal or scalar input. |
| Window | Applies the window you select to the time-domain signal. |