# :MEASure:FFT:THDistortion:SOURce

Total Harmonic Distortion Commands

- :MEASure:FFT:THDistortion
- :MEASure:FFT:THDistortion:FAVorite
- :MEASure:FFT:THDistortion:FFFMode
- :MEASure:FFT:THDistortion:FFFRequency
- :MEASure:FFT:THDistortion:FPLevel
- :MEASure:FFT:THDistortion:FPNumber
- :MEASure:FFT:THDistortion:LOCation?
- :MEASure:FFT:THDistortion:SOURce
- :MEASure:FFT:THDistortion:STATus?
- :MEASure:FFT:THDistortion:STATus:DETails?
- :MEASure:FFT:THDistortion:STATus:REASon?

## Command Syntax

    :MEASure:FFT:THDistortion:SOURce {FUNCtionN}

Where N identifies one of sixty four {1:64} FFT math functions that you can create. For example, `FUNCtion3`. To create a FFT function waveform, see `:FUNCtion:FOPerator`.

## Query Syntax

    :MEASure:FFT:THDistortion:SOURce?

## Description

Selects the source FFT function waveform on which to perform the `:MEASure:FFT:THDistortion` measurement.