Instructions

Chapter 2 Command System RIGOL
MSO5000 Programming Guide 2-95
:MATH<n>:FFT:SOURce
Syntax
:MATH<n>:FFT:SOURce <src>
:MATH<n>:FFT:SOURce?
Description
Sets or queries the channel source of FFT operation/filter.
Parameter
Name
Type
Range
Default
<n>
Discrete
{1|2|3|4}
——
<src>
Discrete
{CHANnel1|CHANnel2|CHANnel3|CHANnel4|}
CHANnel1
Return
Format
The query returns CHAN1, CHAN2, CHAN3, or CHAN4.
Example
:MATH1:FFT:SOURce CHANnel3 /*Sets the channel source of FFT operation to CH3.*/
:MATH1:FFT:SOURce? /*The query returns CHAN3.*/
:MATH<n>:FFT:WINDow
Syntax
:MATH<n>:FFT:WINDow <wnd>
:MATH<n>:FFT:WINDow?
Description
Sets or queries the window function of FFT operation.
Parameter
Name
Type
Range
Default
<n>
Discrete
{1|2|3|4}
——
<wnd>
Discrete
{RECTangle|BLACkman|HANNing|HAMMing|
FLATtop|TRIangle}
RECTangle
Remarks
 Spectral leakage can be considerably decreased when a window function is used.
 Different window functions are applicable to measurements of different waveforms.
You need to select the window function according to the different waveforms to be
measured and their characteristics.
Return
Format
The query returns RECT, BLAC, HANN, HAMM, FLAT, or TRI.
Example
:MATH1:FFT:WINDow BLACkman /*Sets the window function of FFT operation to
Blackman-Harris.*/
:MATH1:FFT:WINDow? /*The query returns BLAC.*/
:MATH<n>:FFT:SPLit
Syntax
:MATH<n>:FFT:SPLit <bool>
:MATH<n>:FFT:SPLit?
Description
Turns on or off the half-screen display of FFT operation; or queries the on/off status of
the half-screen display of FFT operation.
Parameter
Name
Type
Range
Default
<n>
Discrete
{1|2|3|4}
——
<bool>
Bool
{{1|ON}|{0|OFF}}
1|ON
Remarks
 ON: the source channel and the FFT operation results are half-screen displayed.