Math:fft:hcenter; Math:option:start - Rigol DS1000Z Series Programming Manual

RIGOL

:MATH:FFT:HCENter

Syntax
:MATH:FFT:HCENter <cent>
: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. The default unit is Hz.
Parameter Name
<cent>
Explanation
Current screen sample rate = 100/current horizontal timebase.

Step = horizontal scale of the FFT operation result/50.

Return The query returns the current center frequency in scientific notation.
Format
Example
:MATH:FFT:HCENter 10000000
:MATH:FFT:HCENter?
Related
:MATH:OPERator
Commands
:MATH:FFT:HSCale
:TIMebase[:MAIN]:SCALe

:MATH:OPTion:STARt

Syntax :MATH:OPTion:STARt <sta>
:MATH:OPTion:STARt?
Description
Set or query the start point of the waveform math operation.
Parameter
Name
<sta>
Explanation
This command is invalid for the FFT operation. Sending this command will modify the

start points of all the operations (except FFT).
The horizontal axis of the source selected is equally divided into 1200 parts, in which

the leftmost is 0 and the rightmost is 1199.
Return
The query returns an integer.
Format
Example
:MATH:OPTion:STARt 50
Related :MATH:OPTion:END
Command
2-42
Type Range
Real 0 to (current screen sample rate×2/5)
/*Set the center frequency to 10MHz*/
/*The query returns 1.000000e+07*/
Type Range
0 to (End point currently set-1)
Integer
Chapter 2 Command System
Default
5MHz
Default
0
DS1000Z Programming Guide