Instructions

Chapter 2 Command System RIGOL
DS1000Z-E Programming Guide 2-87
:MATH:FFT:MODE
:TIMebase[:MAIN]:SCALe
:MATH:FFT:HSCale
:MATH:FFT:MODE
Syntax :MATH:FFT:MODE <mode>
:MATH:FFT:MODE?
Description
Set or query the FFT mode.
Parameter
Name
Type
Range
Default
<mode>
Discrete
{TRACe|MEMory}
TRACe
Explanation  TRACe: denotes that the data source of the FFT operation is the data of the
waveform displayed on the screen.
 MEMory: denotes that the data source of the FFT operation is the data of the
waveform in the memory.
Return
Format
The query returns TRAC or MEM.
Example :MATH:FFT:MODE TRACe /*Set the FFT mode to TRACe*/
:MATH:FFT:MODE? /* The query returns TRAC*/
:MATH:FILTer:TYPE
Syntax :MATH:FILTer:TYPE <type>
:MATH:FILTer:TYPE?
Description
Set or query the filter type.
Parameter
Name
Type
Range
Default
<type>
Discrete
{LPASs|HPASs|BPASs|BSTOP}
LPASs
Explanation  DS1000Z-E provides 4 types of filters (Low Pass Filter, High Pass Filter, Band Pass
Filter, and Band Stop Filter). Setting the bandwidth can filter the specified
frequencies. You can send the
:MATH:FFT:SOURce command to set or query the
source of the filter.
 LPASs: low pass, which indicates that only the signals whose frequencies are lower
than the current cutoff frequency (ωc1) can pass the filter.
 HPASs: high pass, which indicates that only the signals whose frequencies are
greater than the current cutoff frequency (ωc1) can pass the filter.
 BPASs: band pass, which indicates that only the signals whose frequencies are
greater than current cutoff frequency 1 (ωc1) and lower than current cutoff
frequency 2 (ωc2) can pass the filter.
Note: Cutoff frequency 1 (ωc1) must be lower than cutoff frequency 2 (ωc2).
 BSTOP: band stop, which indicates that only the signals whose frequencies are
lower than current cutoff frequency 1 (ωc1) or greater than current cutoff
frequency 2 (ωc2) can pass the filter.
Note: Cutoff frequency 1 (ωc1) must be lower than cutoff frequency 2 (ωc2).
Return
Format
The query returns LPAS, HPAS, BPAS, or BSTOP.