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restart averaging specifies if the selected averaging process has to be restarted. The default is FALSE. When you call this VI for the first time the averaging process restarts automatically.
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time signal is the input time-domain waveform.
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window is the time-domain window to use.
0 | Uniform | 1 | Hanning (default) | 2 | Hamming | 3 | Blackman-Harris | 4 | Exact Blackman | 5 | Blackman | 6 | Flat Top | 7 | Four Term Blackman-Harris | 8 | Seven Term Blackman-Harris | 9 | Low Sidelobe |
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view is a cluster that defines how the different results from this VI are returned. Parameters include the ability to use decibels, to unwrap the phase, and to convert the phase to degrees.
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dB On specifies if results are expressed in decibels. The default is FALSE.
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unwrap phase specifies if the phase has to be unwrapped (TRUE) or not (FALSE, default). Unwrapping eliminates discontinuities with an absolute value greater than pi.
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convert to degree specifies if the phase results have to be converted from radians to degrees. Default is FALSE, which means that results are expressed in radians.
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error in describes error conditions that occur before this VI or function runs.
The default is no error. If an error occurred before this VI or function runs, the VI or function passes the error in value to error out. This VI or function runs normally only if no error occurs before this VI or function runs. If an error occurs while this VI or function runs, it runs normally and sets its own error status in error out. Use the Simple Error Handler or General Error Handler VIs to display the description of the error code. Use error in and error out to check errors and to specify execution order by wiring error out from one node to error in of the next node.
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status is TRUE (X) if an error occurred before this VI or function ran or FALSE (checkmark) to indicate a warning or that no error occurred before this VI or function ran. The default is FALSE.
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code is the error or warning code. The default is 0.
If status is TRUE, code is a non-zero error code. If status is FALSE, code is 0 or a warning code.
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source describes the origin of the error or warning and is, in most cases, the name of the VI or function that produced the error or warning. The default is an empty string.
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averaging parameters is a cluster that defines how the averaging is computed.
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averaging mode specifies the averaging mode.
0 | No averaging (default) | 1 | Vector averaging | 2 | RMS averaging | 3 | Peak hold |
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weighting mode specifies the weighting mode for RMS and Vector averaging.
0 | Linear | 1 | Exponential (default) |
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number of averages specifies the number of averages that is used for RMS and Vector averaging. If weighting mode is Exponential, the averaging process is continuous. If weighting mode is Linear, the averaging process stops once the selected number of averages have been computed.
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averaging done returns TRUE when the number of averages completed equals or exceeds the number of averages specified in averaging parameters. Otherwise, averaging done returns FALSE. averaging done is always TRUE if the selected averaging mode is No averaging.
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magnitude returns the magnitude of the averaged FFT spectrum and the frequency scale.
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f0 is the start frequency of the spectrum expressed in Hertz.
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df is the frequency resolution of the spectrum expressed in Hertz.
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magnitude magnitude is the magnitude of the averaged FFT spectrum.
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phase returns the phase of the averaged FFT spectrum and the frequency scale.
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f0 is the start frequency of the spectrum expressed in Hertz.
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df is the frequency resolution of the spectrum expressed in Hertz.
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phase is the phase of the averaged FFT spectrum.
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averages completed is the number of averages completed so far.
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error out contains error information. If error in indicates that an error occurred before this VI or function ran, error out contains the same error information. Otherwise, it describes the error status that this VI or function produces.
Right-click the error out indicator on the front panel and select Explain Error from the shortcut menu for more information about the error.
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status is TRUE (X) if an error occurred or FALSE (checkmark) to indicate a warning or that no error occurred.
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code is the error or warning code.
If status is TRUE, code is a non-zero error code. If status is FALSE, code is 0 or a warning code.
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source describes the origin of the error or warning and is, in most cases, the name of the VI or function that produced the error or warning.
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restart averaging specifies if the selected averaging process has to be restarted. The default is FALSE. When you call this VI for the first time the averaging process restarts automatically.
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time signals is input array of time-domain waveforms.
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window is the time-domain window to use.
0 | Uniform | 1 | Hanning (default) | 2 | Hamming | 3 | Blackman-Harris | 4 | Exact Blackman | 5 | Blackman | 6 | Flat Top | 7 | Four Term Blackman-Harris | 8 | Seven Term Blackman-Harris | 9 | Low Sidelobe |
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view is a cluster that defines how the different results from this VI are returned. Parameters include the ability to use decibels, to unwrap the phase, and to convert the phase to degrees.
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dB On specifies if results are expressed in decibels. The default is FALSE.
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unwrap phase specifies if the phase has to be unwrapped (TRUE) or not (FALSE, default). Unwrapping eliminates discontinuities with an absolute value greater than pi.
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convert to degree specifies if the phase results have to be converted from radians to degrees. Default is FALSE, which means that results are expressed in radians.
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error in describes error conditions that occur before this VI or function runs.
The default is no error. If an error occurred before this VI or function runs, the VI or function passes the error in value to error out. This VI or function runs normally only if no error occurs before this VI or function runs. If an error occurs while this VI or function runs, it runs normally and sets its own error status in error out. Use the Simple Error Handler or General Error Handler VIs to display the description of the error code. Use error in and error out to check errors and to specify execution order by wiring error out from one node to error in of the next node.
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status is TRUE (X) if an error occurred before this VI or function ran or FALSE (checkmark) to indicate a warning or that no error occurred before this VI or function ran. The default is FALSE.
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code is the error or warning code. The default is 0.
If status is TRUE, code is a non-zero error code. If status is FALSE, code is 0 or a warning code.
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source describes the origin of the error or warning and is, in most cases, the name of the VI or function that produced the error or warning. The default is an empty string.
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averaging parameters is a cluster that defines how the averaging is computed.
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averaging mode specifies the averaging mode.
0 | No averaging (default) | 1 | Vector averaging | 2 | RMS averaging | 3 | Peak hold |
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weighting mode specifies the weighting mode for RMS and Vector averaging.
0 | Linear | 1 | Exponential (default) |
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number of averages specifies the number of averages that is used for RMS and Vector averaging. If weighting mode is Exponential, the averaging process is continuous. If weighting mode is Linear, the averaging process stops once the selected number of averages have been computed.
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averaging done returns TRUE when the number of averages completed equals or exceeds the number of averages specified in averaging parameters. Otherwise, averaging done returns FALSE. averaging done is always TRUE if the selected averaging mode is No averaging.
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magnitudes is an array of magnitudes of the averaged FFT spectrums, one per input waveform.
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magnitude returns the magnitude of the averaged FFT spectrum and the frequency scale.
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f0 is the start frequency of the spectrum expressed in Hertz.
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df is the frequency resolution of the spectrum expressed in Hertz.
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magnitude magnitude is the magnitude of the averaged FFT spectrum.
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phases is an array of phases of the averaged FFT spectrums, one per input waveform.
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phase returns the phase of the averaged FFT spectrum and the frequency scale.
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f0 is the start frequency of the spectrum expressed in Hertz.
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df is the frequency resolution of the spectrum expressed in Hertz.
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phase is the phase of the averaged FFT spectrum.
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averages completed is the number of averages completed so far.
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error out contains error information. If error in indicates that an error occurred before this VI or function ran, error out contains the same error information. Otherwise, it describes the error status that this VI or function produces.
Right-click the error out indicator on the front panel and select Explain Error from the shortcut menu for more information about the error.
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status is TRUE (X) if an error occurred or FALSE (checkmark) to indicate a warning or that no error occurred.
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code is the error or warning code.
If status is TRUE, code is a non-zero error code. If status is FALSE, code is 0 or a warning code.
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source describes the origin of the error or warning and is, in most cases, the name of the VI or function that produced the error or warning.
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The single-channel version of this VI can perform single-channel measurements in both one-shot mode (single call) and continuous mode (multiple calls with history). It can perform multichannel measurements only in one-shot mode. If you want to make multiple-channel measurements in continuous mode, use the multiple-channel version of this VI.
The single-channel version of this VI is primarily intended for continuous processing of a single channel. Generalizing this behavior to the multi-channel case, typically by using this single-channel VI in a for loop to continuously process multiple channels by indexing an array of waveforms, is a misuse of this VI.
The single-channel version of this VI maintains internal state information for only one single channel per instance on a diagram. Calling this VI to process another channel without clearing the history using the reset control or the restart averaging control results in an unexpected behavior of this VI because the internal state information is passed from one channel to another.