Rigol DS2000A Series Dokumentacja Pobierz pdf (Strona 78)

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RIGOL 2 Command System

2-62 MSO2000A/DS2000A Programming Guide

:CALCulate:FFT:HSPan

Syntax

:CALCulate:FFT:HSPan <span>

:CALCulate:FFT:HSPan?

Description

Set or query the horizontal scale of the FFT operation result. The unit is Hz/div.

Parameter

Name Type Range Default

<span> Discrete Refer to the Explanation 1.25MHz/div

Explanation

 The FFT horizontal scale is related to the current FFT sample rate of the screen (Sa). It can be Sa/20,

Sa/40, Sa/100 and Sa/200.

 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.

 You can set the horizontal scale of FFT operation indirectly by setting the FFT horizontal coefficient

(:CALCulate:FFT:HSCale

Return Format

The query returns the horizontal scale of the FFT operation result in scientific notation.

1 2 ... 73 74 75 76 77 78 79 80 81 82 83 ... 389 390

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