Rigol DS2000E Series Programming Guide

RIGOL 2 Command System
2-62 DS2000E Programming Guide
:CALCulate:FFT:HOFFset
Syntax
:CALCulate:FFT:HOFFset <offs>
:CALCulate:FFT:HOFFset?
Description
Set or query the horizontal offset of the FFT operation result. The unit is Hz.
Parameter
Name Type Range Default
<offs> Real Refer to Explanation 0
Explanation
 The range of <offs> is related to the on/off status of the anti-aliasing function, the current FFT
sample rate of the screen (Sa) and the current FFT horizontal scale (Hspan).
When the anti-aliasing function is disabled: max{-0.5 x Sa, -14 x Hspan} to 0.5 x Sa
When the anti-aliasing function is enabled: max{-0.4 x Sa, -14 x Hspan} to 0.4 x Sa
Note: max{A, B} means using the larger one of A and B.
 The current FFT sample rate of the screen=the number of pixels per grid horizontally/the horizontal
timebase. The number of pixels per grid horizontally is related to the on/off status of the FFT
anti-aliasing function; it is 50 when the ainti-aliasing function is disabled and 100 when the
anti-aliasing function is enabled. For the horizontal timebase, refer to the
:TIMebase[:MAIN]:SCALe
command.
 The FFT horizontal scale is related to the current FFT sample rate of the screen and the FFT
horizontal coefficient. Please refer to the
:CALCulate:FFT:HSPan command.
Return Format
The query returns the horizontal offset of the FFT operation result in scientific notation.

Rigol DS2000E Series Specifications

General

Bandwidth	70 MHz to 200 MHz
Channels	2 or 4
Vertical Sensitivity	1 mV/div to 10 V/div
Vertical Resolution	8-bit
Timebase Range	2 ns/div to 50 s/div
Memory Depth	14 Mpts
Input Impedance	1 MΩ ± 1%
Trigger Modes	Edge, Pulse, Video
Waveform Capture Rate	50, 000 wfm/s
Interfaces	USB, LAN
Power Supply	100-240 VAC
Display	8-inch WVGA (800x480) LCD