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RIGOL 2 Command System

2-60 MSO2000A/DS2000A Programming Guide

:CALCulate:FFT:HSCale

Syntax

:CALCulate:FFT:HSCale <hscale>

:CALCulate:FFT:HSCale?

Description

Set or query the horizontal coefficient of FFT operation. This command indirectly sets the horizontal scale

of FFT operation.

Parameter

Name Type Range Default

<hscale> Discrete {1|2|3|4} 2

Note: You can use the :CALCulate:FFT:HSPan command to set the horizontal scale of FFT operation directly.

Explanation

 The FFT horizontal coefficient represents the relationship between the FFT horizontal scale (Hspan)

and the current FFT sample rate of the screen (Sa).

1: Hspan=Sa/20

2: Hspan=Sa/40

3: Hspan=Sa/100

4: Hspan=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

aunti-aliasing function; it is 50 when the anti-aliasing function is disabled and 100 when the

anti-aliasing function is enabled. For the horizontal timebase, refer to the

:TIMebase[:MAIN]:SCALe

command.

Return Format

The query returns 1, 2, 3 or 4.

1 2 ... 71 72 73 74 75 76 77 78 79 80 81 ... 389 390

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