Instructions

RIGOL Chapter 2 Command System
2-94 MSO5000-E Programming Guide
: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:UNIT
Syntax :MATH<n>:FFT:UNIT <unit>
:MATH<n>:FFT:UNIT?
Description
Sets or queries the vertical unit of FFT operation results.
Parameter
Name
Type
Range
Default
<n>
Discrete
{1|2|3|4}
——
<unit>
Discrete
{VRMS|DB}
DB
Return
Format
The query returns VRMS or DB.
Example
:MATH1:FFT:UNIT VRMS /*Sets the vertical unit of FFT operation results to Vrms.*/
:MATH1:FFT:UNIT? /*The query returns VRMS.*/
:MATH<n>:FFT:SCALe
Syntax :MATH<n>:FFT:SCALe <scale>
:MATH<n>:FFT:SCALe?
Description
Sets or queries the vertical scale of FFT operation results.
Parameter
Name
Type
Range
Default
<n>
Discrete
{1|2|3|4}
——
<scale>
Real
1 ndB to 5 GdB
1 dB
Return
Format
The query returns the current vertical scale in scientific notation.