For example :MATH:FFT:SPLit OFF /*Turn off half screen display*/ :MATH:FFT:SPLit? /*The query returns 0*/ : MATH: FFT: UNIT For example, :MATH:FFT:UNIT VRMS /*Set the vertical unit of the FFT operation result to Vrms*/ :MATH:FFT:UNIT? /*The query returns VRMS*/ :MATH:FFT:HSCale For example, :MATH:FFT:HSCale 125000 /*Set the horizontal scale of the FFT calculation result to 125kHz*/ :MATH:FFT:HSCale? /*The query returns 1.25000e + 05*/ 39 / 136 Parameter Name Type Range Default Bool {{1|ON}|{0|OFF}} 1|ON Description ▷Open half-screen: The source channel and FFT calculation results are displayed on a half-screen, and the time and frequency domain signals are clear at a glance.
▷Close half screen (full screen): The source channel and the FFT calculation result are displayed in the same window. You can observe the spectrum more clearly and make more accurate measurements. Return format The query returns 1 or 0. Command format :MATH:FFT:UNIT :MATH:FFT:UNIT? Function description Sets or queries the vertical unit of the FFT operation result. Parameter Name Type Range Default Discrete {VRMS|DB} DB Return format Query returns VRMS or DB。 Command format :MATH:FFT:HSCale :MATH:FFT:HSCale? Function description Set or query the horizontal scale of the FFT operation result. The default unit is Hz.
Parameter Name Type Range Default Integer Reference description 5MHz Description ▷ can be set to 1/1000, 1/400, 1/200, 1/100, 1/40, or 1/20 of the FFT sampling rate. ▷When the FFT mode is TRACe, the FFT sampling rate is the screen sampling rate (ie 100 / horizontal time base). When the FFT mode is MEMory, the FFT sampling rate is the memory sampling rate (: ACQuire: SRATe?). ▷You can observe the detailed information of the spectrum by reducing the horizontal scale. Return format The query returns the current horizontal scale in scientific notation.