Instructions

Chapter 2 Command System RIGOL
MSO5000-E Programming Guide 2-95
Example :MATH1:FFT:SCALe 0.3 /*Sets the vertical scale of the FFT operation results to 300
mdB.*/
:MATH1:FFT:SCALe? /*The query returns 3.000000E-1.*/
:MATH<n>:FFT:OFFSet
Syntax :MATH<n>:FFT:OFFSet <offset>
:MATH<n>:FFT:OFFSet?
Description
Sets or queries the vertical offset of FFT operation results.
Parameter
Name
Type
Range
Default
<n> Discrete {1|2|3|4}
——
<offset>
Real
-1 GdB to 1 GdB
0 dB
Return
Format
The query returns the current vertical offset in scientific notation.
Example
:MATH1:FFT:OFFSet 0.3 /*Sets the vertical offset of the FFT operation results to
300 mdB*/
:MATH1:FFT:OFFSet? /*The query returns 3.000000E-1.*/
:MATH<n>:FFT:HSCale
Syntax :MATH<n>:FFT:HSCale <hsc>
:MATH<n>:FFT:HSCale?
Description
Sets or queries the frequency range of FFT operation results. The default unit is Hz.
Parameter
Name
Type
Range
Default
<hsc>
Real
10 Hz to 5 GHz
10 MHz
Remarks You can reduce the frequency range to observe the details of the spectrum.
Return
Format
The query returns the current frequency range in scientific notation.
Example
:MATH1:FFT:HSCale 500000 /*Sets the frequency range of FFT operation results to
500 kHz.*/
:MATH1:FFT:HSCale? /*The query returns 5.000000E+5.*/
:MATH<n>:FFT:HCENter
Syntax :MATH<n>:FFT:HCENter <cent>
:MATH<n>:FFT:HCENter?
Description Sets or queries the center frequency of FFT operation results, i.g. the frequency relative to
the horizontal center of the screen. The default unit is Hz.
Parameter
Name
Type
Range
Default
<n>
Discrete
{1|2|3|4}
——
<cent>
Real
-2.5 GHz to 2.5 GHz
5 MHz