:MATH:FFT:HCENter For example, :MATH:FFT:HCENter 10000000 /*Set the center frequency of the FFT operation result to 10MHz*/ :MATH:FFT:HCENter? /*The query returns 1.000000e + 07*/ :MASK command subsystem The :MASK command is used to set and query related parameters in the pass / fail test. :MASK:ENABle For example, :MASK:ENABle ON /*Turn on the pass / fail test function*/ :MASK:ENABle? /*The query returns ON*/ :MASK:SOURce 40 / 136 Command format :MATH:FFT:HCENter :MATH:FFT:HCENter? Function description Set or query the center frequency of the FFT operation result, that is, the frequency corresponding to the horizontal center of the screen. The default unit is Hz.
Parameter Name Type Range Default Integer Reference description 5MHz Description ▷When the FFT mode is TRACe (trace), the range of is 0 to (0.4 × FFT sampling rate); where the FFT sampling rate is the screen sampling rate (that is, 100 / horizontal time base). When the FFT mode is MEMory, the range of is 0 to (0.5 × FFT sampling rate); where the FFT sampling rate is the memory sampling rate (: ACQuire: SRATe?). ▷The set step is the horizontal scale / 50 of the current FFT calculation result. Return format The query returns the current center frequency in scientific notation. Command format :MASK:ENABle :MASK:ENABle?
Function description Turn the pass / fail test function on or off, or query the status of the pass / fail test function. Parameter Name Type Range Default Bool {{1|ON}|{0|OFF}} 0|OFF Description The pass / fail test function is invalid in the following cases: the horizontal time base mode is XY or ROLL mode, the slow scan mode (that is, the horizontal time base is YT mode, the horizontal time base is 200ms / div or slower), and the waveform is recorded. Return format The query returns 1 or 0. Command format :MASK:SOURce :MASK:SOURce? Function description Set or query the measurement source of the pass / fail test. Parameter Name Type Range Default