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

Brand	Rigol
Model	DS2000E Series
Category	Test Equipment
Language	English