# :MEASure:FFT:THDistortion:FFFMode

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:FFFMode {FPEak | MANual}

## Query Syntax

    :MEASure:FFT:THDistortion:FFFMode?

## Description

This command specifies the how the fundamental frequency for the Total Harmonic Distortion measurement (`:MEASure:FFT:THDistortion`) is identified:

- `FPEak` — Lets the oscilloscope determine the fundamental frequency given the magnitude threshold specified by the `:MEASure:FFT:THDistortion:FPLevel` command and the number specified by the `:MEASure:FFT:THDistortion:FPNumber` command.
- `MANual` — Lets you specify the fundamental frequency directly using the `:MEASure:FFT:THDistortion:FFFRequency` command.