# :MEASure:FFT:THDistortion:FPNumber

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:FPNumber <peak_number>

<peak_number> is an integer.

## Query Syntax

    :MEASure:FFT:THDistortion:FPNumber?

## Description

When the mode of specifying the fundamental frequency for the Total Harmonic Distortion measurement (`:MEASure:FFT:THDistortion:FFFMode`) is `FPEak`, this command specifies the peak number to use when determining the fundamental frequency.

The specified peak level (`:MEASure:FFT:THDistortion:FPLevel`) is used in determining the frequency peaks and peak numbering.