Last Modified: January 12, 2018

Performs a full Signal in Noise and Distortion (SINAD) analysis, including measuring the fundamental frequency tone and returning the fundamental frequency and SINAD level in dB.

Source of the signal and spectrum to export.

Name | Description |
---|---|

none | Uses the fastest computation. |

input signal | Exports the input signal only. |

detected signal | Exports a single tone. |

residual signal | Exports a signal minus the tone. |

**Default: **none

Center frequency to use in the frequency-domain search for the fundamental tone frequency.

**Default: **-1

Frequency width, as a percentage of the sampling rate, for the frequency-domain search for the fundamental tone frequency.

**Default: **5

Error conditions that occur before this node runs.

The node responds to this input according to standard error behavior.

Standard Error Behavior

Many nodes provide an **error in** input and an **error out** output so that the node can respond to and communicate errors that occur while code is running. The value of **error in** specifies whether an error occurred before the node runs. Most nodes respond to values of **error in** in a standard, predictable way.

**Default: **No error

Spectrum of the exported signal.

This output can return a cluster or a 1D array of clusters.

Start frequency, in Hz, of the spectrum.

Frequency resolution, in Hz, of the spectrum.

Computed spectrum.

Waveform of the exported signal.

This output can return a waveform or a 1D array of waveforms.

Detected fundamental frequency resulting from searching the frequency domain.

This output can return a double-precision, floating-point number or a 1D array of double-precision, floating-point numbers.

Use the center frequency and frequency width to set the frequency domain search range. All harmonics are measured at integer multiples of this fundamental frequency.

Measured Signal in Noise and Distortion (SINAD) expressed in dB.

This output can return a double-precision, floating-point number or a 1D array of double-precision, floating-point numbers.

This output is the ratio of the RMS energy of the input signal to the RMS energy of the input signal less the energy in the fundamental. To compute the measured total harmonic distortion plus noise in dB, negate the SINAD in dB

Measured total harmonic distortion (THD) plus noise.

This output can return a double-precision, floating-point number or a 1D array of double-precision, floating-point numbers.

This output is the ratio of the RMS energy of the input signal less the energy in the fundamental to the RMS energy of the input signal. To compute this output as a percentage, multiply the value by 100.

Error information.

The node produces this output according to standard error behavior.

Standard Error Behavior

**error in** input and an **error out** output so that the node can respond to and communicate errors that occur while code is running. The value of **error in** specifies whether an error occurred before the node runs. Most nodes respond to values of **error in** in a standard, predictable way.

**Where This Node Can Run: **

Desktop OS: Windows

FPGA: This product does not support FPGA devices

Web Server: Not supported in VIs that run in a web application