Instructions

57
Description : Set or query the vertical unit of the FFT operation result.
Parameter :<unit> ::= < VRMS| DB>
Return : The query returns VRMS，DB
Example :MATH:FFT:UNIT DB /*Set the vertical unit of the FFT
operation result to DB*/
:MATH:FFT:UNIT? /* The query returns DB */
MATH:FFT:HSCale
Syntax :MATH:FFT:HSCale <hscale>
:MATH:FFT:HSCale?
Description : Set or query the horizontal scale of the FFT operation
result,unit Hz
Parameter :<hscale> ::= <125000|250000|625000|1250000>
Explanation : You can view the detailed information of the frequency
spectrum by reducing the horizontal scale.
Return : The query returns the horizontal scale in scientific
notation.
Example :MATH:FFT:HSCale 125000 /*Set the horizontal scale of the
FFT operation result to 125KHz*/
:MATH:FFT:HSCale? /* The query returns
1.250000e+05*/
MATH:FFT:HCENter
Syntax :MATH:FFT:HCENter <center>
:MATH:FFT:HCENter?
Description : Set or query the center frequency of the FFT operation
result, namely the frequency relative to the horizontal
center of the screen
Parameter :<center> ::= the center frequency，unit is Hz
Return : The query returns the current center frequency in
scientific notation.
Example :MATH:FFT:HCENter 10000000 /*set center frequency 10MHz */
:MATH:FFT:HCENter? /* The query returns 1.000000e+07*/