Math:fft:unit; Math:fft:hscale - Rigol DS1000Z Series Programming Manual

Chapter 2 Command System

:MATH:FFT:UNIT

Syntax
:MATH:FFT:UNIT <unit>
:MATH:FFT:UNIT?
Description
Set or query the vertical unit of the FFT operation result.
Parameter
Name
<unit>
Return
The query returns DB or VRMS.
Format
Example
:MATH:FFT:UNIT VRMS
Related :MATH:OPERator
Command

:MATH:FFT:HSCale

Syntax
:MATH:FFT:HSCale <hsc>
:MATH:FFT:HSCale?
Description
Set or query the horizontal scale of the FFT operation result. The default unit is Hz.
Parameter
Name
<hsc>
Explanation


Return The query returns the horizontal scale in scientific notation.
Format
Example :MATH:FFT:HSCale 500000
:MATH:FFT:HSCale?
Related :MATH:OPERator
Commands
:TIMebase[:MAIN]:SCALe
DS1000Z Programming Guide
Type Range
Discrete {VRMS|DB}
Type Range
Refer to
Real
<hsc> can be set to 1/20, 1/40, 1/100 and 1/200 of the current screen sample rate
(current screen sample rate=100/current horizontal timebase).
For example, if the horizontal timebase of the instrument is 1μs, the current screen
sample rate is 100/1μs=100MHz. Thus, the horizontal scale can be set to 5MHz,
2.5MHz, 1MHz or 500kHz.
You can view the detailed information of the spectrum by reducing the horizontal
scale.
/*The query returns 5.000000e+05*/
Explanation
/*Set the horizontal scale to 500kHz*/
RIGOL
Default
DB
Default
5.00MHz
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