# :FUNCtion:PARameters:FFT:NFRequency

FFT Parameters Commands

- :FUNCtion:PARameters:FFT:AIMPedance
- :FUNCtion:PARameters:FFT:DETector:COUNt
- :FUNCtion:PARameters:FFT:DETector:TYPE
- :FUNCtion:PARameters:FFT:DISPlay
- :FUNCtion:PARameters:FFT:NFRequency
- :FUNCtion:PARameters:FFT:PEAK:ASCii:FDATa?
- :FUNCtion:PARameters:FFT:PEAK:ASCii:MDATa?
- :FUNCtion:PARameters:FFT:PEAK:COUNt
- :FUNCtion:PARameters:FFT:PEAK:DOUBle:FDATa?
- :FUNCtion:PARameters:FFT:PEAK:DOUBle:MDATa?
- :FUNCtion:PARameters:FFT:PEAK:ENABle
- :FUNCtion:PARameters:FFT:PEAK:LEVel
- :FUNCtion:PARameters:FFT:PEAK:SORT
- :FUNCtion:PARameters:FFT:PREFerence
- :FUNCtion:PARameters:FFT:PREFerence:TORigin
- :FUNCtion:PARameters:FFT:RBANdwidth?
- :FUNCtion:PARameters:FFT:RIMPedance
- :FUNCtion:PARameters:FFT:TFACtor
- :FUNCtion:PARameters:FFT:WINDow

## Command Syntax

    :FUNCtionN:PARameters:FFT:NFRequency <double>

Where N identifies one of up to 64 possible operators {1:64} that can be defined as part of a math function. The operators are numbered in the order that they were originally added to the function.

Where <double> is the FFT normalization frequency. For example, `1.00E+5`.

## Query Syntax

    :FUNCtionN:PARameters:FFT:NFRequency?

## Description

Sets the FFT normalization frequency when the FFT's display is set to dB (Normalized) using the `:FUNCtion:PARameters:FFT:DISPlay` command. The default value is 0 Hz. The minimum value is 0 Hz. The maximum value is 500 GHz.