Align Waveforms (continuous) VI

Owning Palette: Waveform Conditioning VIs

Requires: Full Development System

Performs element-wise alignment of waveforms and returns the aligned waveforms. The data types you wire to the waveform inputs determine the polymorphic instance to use.

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

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Align N Waveforms (continuous)

reset resets the phase to the phase control value and the time stamp to zero. The default is FALSE.
waveforms in is an array of waveforms to align.
interpolation mode specifies the interpolation method.

0Coerce—Each output sample is set equal to the input sample value that is closest to it in time.
1Linear (default)—Each output sample value is a linear interpolation between the two input samples that are closest to it in time.
2Spline—Uses the spline interpolation algorithm to compute the resampled values.
3FIR filter—Uses a finite impulse response (FIR) filtering algorithm to compute the resampled values.
error in describes error conditions that occur before this node runs. This input provides standard error in functionality.
FIR filter specifications specifies the minimum values this VI needs to specify the FIR filter.
alias rejection (dB) specifies the minimum attenuation level of signal components aliased after any resampling operation. The default is 120.
normalized bandwidth specifies the fraction of the new sampling rate that is not attenuated. The default is 0.4536.
interpolation specifies whether interpolation is performed. The default is TRUE.
waveforms out contains the aligned waveforms.
error out contains error information. This output provides standard error out functionality.

Align M + N Waveforms (continuous)

reset resets the phase to the phase control value and the time stamp to zero. The default is FALSE.
M waveforms in is an array of waveforms to align.
N waveforms in is an array of waveforms to align.
interpolation mode specifies the interpolation method.

0Coerce—Each output sample is set equal to the input sample value that is closest to it in time.
1Linear (default)—Each output sample value is a linear interpolation between the two input samples that are closest to it in time.
2Spline—Uses the spline interpolation algorithm to compute the resampled values.
3FIR filter—Uses a finite impulse response (FIR) filtering algorithm to compute the resampled values.
error in describes error conditions that occur before this node runs. This input provides standard error in functionality.
FIR filter specifications specifies the minimum values this VI needs to specify the FIR filter.
alias rejection (dB) specifies the minimum attenuation level of signal components aliased after any resampling operation. The default is 120.
normalized bandwidth specifies the fraction of the new sampling rate that is not attenuated. The default is 0.4536.
interpolation specifies whether interpolation is performed. The default is TRUE.
M aligned waveforms out is an array of aligned waveforms.
N aligned waveforms out is an array of aligned waveforms.
error out contains error information. This output provides standard error out functionality.

Align N + 1 Waveforms (continuous)

reset resets the phase to the phase control value and the time stamp to zero. The default is FALSE.
waveforms in is an array of waveforms to align.
waveform in is a waveform to align.
interpolation mode specifies the interpolation method.

0Coerce—Each output sample is set equal to the input sample value that is closest to it in time.
1Linear (default)—Each output sample value is a linear interpolation between the two input samples that are closest to it in time.
2Spline—Uses the spline interpolation algorithm to compute the resampled values.
3FIR filter—Uses a finite impulse response (FIR) filtering algorithm to compute the resampled values.
error in describes error conditions that occur before this node runs. This input provides standard error in functionality.
FIR filter specifications specifies the minimum values this VI needs to specify the FIR filter.
alias rejection (dB) specifies the minimum attenuation level of signal components aliased after any resampling operation. The default is 120.
normalized bandwidth specifies the fraction of the new sampling rate that is not attenuated. The default is 0.4536.
interpolation specifies whether interpolation is performed. The default is TRUE.
aligned waveforms out is an array of aligned waveforms.
aligned waveform out contains an aligned waveform.
error out contains error information. This output provides standard error out functionality.

Align 1 + N Waveforms (continuous)

reset resets the phase to the phase control value and the time stamp to zero. The default is FALSE.
waveform in is a waveform to align.
waveforms in is an array of waveforms to align.
interpolation mode specifies the interpolation method.

0Coerce—Each output sample is set equal to the input sample value that is closest to it in time.
1Linear (default)—Each output sample value is a linear interpolation between the two input samples that are closest to it in time.
2Spline—Uses the spline interpolation algorithm to compute the resampled values.
3FIR filter—Uses a finite impulse response (FIR) filtering algorithm to compute the resampled values.
error in describes error conditions that occur before this node runs. This input provides standard error in functionality.
FIR filter specifications specifies the minimum values this VI needs to specify the FIR filter.
alias rejection (dB) specifies the minimum attenuation level of signal components aliased after any resampling operation. The default is 120.
normalized bandwidth specifies the fraction of the new sampling rate that is not attenuated. The default is 0.4536.
interpolation specifies whether interpolation is performed. The default is TRUE.
aligned waveform out contains an aligned waveform.
aligned waveforms out is an array of aligned waveforms.
error out contains error information. This output provides standard error out functionality.

Align two Waveforms (continuous)

The time and component values of the result are the same as those of waveform A in. If the dt values are not equal, error out returns a warning and waveform A out and waveform B out are empty.

reset resets the phase to the phase control value and the time stamp to zero. The default is FALSE.
waveform A in is a waveform to align.
waveform B in is a waveform to align.
interpolation mode specifies the interpolation method.

0Coerce—Each output sample is set equal to the input sample value that is closest to it in time.
1Linear (default)—Each output sample value is a linear interpolation between the two input samples that are closest to it in time.
2Spline—Uses the spline interpolation algorithm to compute the resampled values.
3FIR filter—Uses a finite impulse response (FIR) filtering algorithm to compute the resampled values.
error in describes error conditions that occur before this node runs. This input provides standard error in functionality.
FIR filter specifications specifies the minimum values this VI needs to specify the FIR filter.
alias rejection (dB) specifies the minimum attenuation level of signal components aliased after any resampling operation. The default is 120.
normalized bandwidth specifies the fraction of the new sampling rate that is not attenuated. The default is 0.4536.
interpolation specifies whether interpolation is performed. The default is TRUE.
waveform A out is the waveform that results from aligning waveform A in and waveform B in.
waveform B out is the waveform that results from aligning waveform B in and waveform A in.
error out contains error information. This output provides standard error out functionality.

Align Waveforms (continuous) Details

Related Information

Passband Ripple and Stopband Attenuation

Example

Refer to the Align and Subtract two Waveforms (continuous) VI in the labview\examples\Signal Processing\Waveform Conditioning directory for an example of using the Align Waveforms (continuous) VI.

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