# :MEASure:FFT:FPSDensity:SOURce

FFT Power Spectral Density Commands

- :MEASure:FFT:FPSDensity
- :MEASure:FFT:FPSDensity:FAVorite
- :MEASure:FFT:FPSDensity:FCBandwidth
- :MEASure:FFT:FPSDensity:FCCenter
- :MEASure:FFT:FPSDensity:LOCation?
- :MEASure:FFT:FPSDensity:SOURce
- :MEASure:FFT:FPSDensity:STATus?
- :MEASure:FFT:FPSDensity:STATus:DETails?
- :MEASure:FFT:FPSDensity:STATus:REASon?

## Command Syntax

    :MEASure:FFT:FPSDensity: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:FPSDensity:SOURce?

## Description

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