User manual

Chapter 2 Command System RIGOL
MSO7000/DS7000 Programming Guide 2-99
You can view the time-domain and frequency-domain signals clearly.
 OFF: the source channel and the FFT operation results are displayed in the same
window (on the full screen) to view the frequency spectrum more clearly and to
perform more precise measurement.
Return
Format
The query returns 1 or 0.
Example
:MATH1:FFT:SPLit OFF /*Disables the half-screen display.*/
:MATH1:FFT:SPLit? /*The query returns 0.*/
: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
50 mdB to 20 dB
1 dB
Return
Format
The query returns the current vertical scale in scientific notation.
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.*/