Instructions

RIGOL Chapter 2 Command System
2-86 DS1000Z-E Programming Guide
:MATH:FFT:HSCale
Syntax :MATH:FFT:HSCale <hsc>
:MATH:FFT:HSCale?
Description
Set or query the horizontal scale of the FFT operation result. The default unit is Hz.
Parameter
Name
Type
Range
Default
<hsc>
Real
Refer to Explanation
5MHz
Explanation  <hsc> can be set to 1/1000, 1/400, 1/200, 1/100, 1/40, or 1/20 of the FFT sample
rate.
 When the FFT mode is set to TRACe, FFT sample rate equals to screen sample rate,
that is, 100/horizontal timebase.
When the FFT mode is set to MEMory, FFT sample rate equals to memory sample
rate (
:ACQuire:SRATe?).
 You can view the detailed information of the frequency spectrum by reducing the
horizontal scale.
Return
Format
The query returns the horizontal scale in scientific notation.
Example
:MATH:FFT:HSCale 500000 /*Set the horizontal scale of the FFT operation result to
500kHz*/
:MATH:FFT:HSCale? /*The query returns 5.000000e+05*/
Related
Commands
:MATH:OPERator
:MATH:FFT:MODE
:TIMebase[:MAIN]:SCALe
: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
Type
Range
Default
<cent>
Real
Refer to Explanation
5MHz
Explanation  When the FFT mode is set to TRACe, the range of <cent> is from 0 to (0.4 x FFT
sample rate). Wherein, FFT sample rate equals to screen sample rate, that is,
100/horizontal timebase.
When the FFT mode is set to MEMory, the range of <cent> is from 0 to (0.5 x FFT
sample rate). Wherein, FFT sample rate equals to memory sample rate
(
:ACQuire:SRATe?).
 Step = Horizontal Scale of the FFT operation result/50.
Return
Format
The query returns the current center frequency in scientific notation.
Example
:MATH:FFT:HCENter 10000000 /*Set the center frequency of the FFT operation result
to 10MHz*/
:MATH:FFT:HCENter? /*The query returns 1.000000e+07*/
Related
Commands
:MATH:OPERator