Fluke PM-3394B, PM-3380B, PM-3390B Query form CALCulatenTRANsformFREQuencyTYPE?, Response ABS REL

4 - 38 COMMAND REFERENCE

CALCulate<n>:TRANsform:FREQuency:STATe

CALCulate<n>:TRANsform:FREQuency:TYPE

CALCulate<n>:TRANsform:FREQuency:WINDow

Syntax: CALCulate<n>:TRANsform:FREQuency:STATe <Boolean>

CALCulate<n>:TRANsform:FREQuency:TYPE ABSolute

RELative

CALCulate<n>:TRANsform:FREQuency:WINDow RECTangular

HAMMing HANNing

<n> [1] 2

Query form: CALCulate<n>:TRANsform:FREQuency:STATe?

Response: 0 1

Query form: CALCulate<n>:TRANsform:FREQuency:TYPE?

Response: ABS REL

Query form: CALCulate<n>:TRANsform:FREQuency:WINDow?

Response: RECT HAMM HANN

Description:

The CALCulate<n>:TRANsform:FREQuency:TYPE command selects between RELative and ABSolute FFT calculation.

The CALCulate<n>:TRANsform:FREQuency:WINDow command defines the window type that is used with the FFT function. The FFT RECTangular function transforms a repetitive time amplitude trace into its power spectrum. Displayed is the amplitude (vertical) versus the frequency (horizontal). The FFT HAMMing and HANNing functions reduce the side lobes by applying a Hamming or Hanning window to the input signal. This improves the visibility of the minor frequency components if the MATH1/MATH2 - FFT - PARAM "limited area" function is not accurately selected.

The result of the FFT function is stored in M1_1 for CALCulate1 and in M2_1 for CALCulate2. After a *RST command, the FFT type is RELative, the FFT window is RECTangular, and the FFT functions are switched OFF.