Rigol DS1104Z Plus Programming Guide

RIGOL Chapter 2 Command System
2-98 MSO1000Z/DS1000Z Programming Guide
: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
:MATH:FFT:MODE
:TIMebase[:MAIN]:SCALe
:MATH:FFT:HSCale
:MATH:FFT:MODE
Syntax
:MATH:FFT:MODE <mode>
:MATH:FFT:MODE?
Description
Set or query the FFT mode.
Parameter
Name
Type
Range
Default
<mode>
Discrete
{TRACe|MEMory}
TRACe
Explanation
 TRACe: denotes that the data source of the FFT operation is the data of the
waveform displayed on the screen.
 MEMory: denotes that the data source of the FFT operation is the data of the
waveform in the memory.
Return
Format
The query returns TRAC or MEM.
Example
:MATH:FFT:MODE TRACe /*Set the FFT mode to TRACe*/
:MATH:FFT:MODE? /* The query returns TRAC*/

Rigol DS1104Z Plus Specifications

General

Bandwidth	100 MHz
Channels	4
Sample Rate	1 GSa/s
Memory Depth	24 Mpts
Waveform Capture Rate	30, 000 wfms/s
Vertical Sensitivity	1 mV/div to 10 V/div
Timebase Range	5 ns/div to 50 s/div
Connectivity	USB Host, USB Device, LAN, AUX
Vertical Resolution	8 bits
Power Supply	100-240 V AC, 45-440 Hz
Display	7 inch TFT LCD
Trigger Types	Edge, Pulse, Video, Slope
Input Impedance	1 MΩ ± 2%