Instructions

Chapter 2 Command System RIGOL
MSO5000-E Programming Guide 2-99
are smaller than the current cut-off frequency to pass.
 HPASs: indicates high pass filter, which only allows the signals whose
frequencies are greater than the current cut-off frequency to pass.
 BPASs: indicates band pass filter, which only allows the signals whose
frequencies are greater than the current cut-off frequency 1 and smaller than
the current cut-off frequency 2 to pass.
Note: The cut-off frequency 1 must be smaller than the cut-off frequency 2.
 BSTop: indicates band stop filter, which only allows the signals whose
frequencies are smaller than the current cut-off frequency 1 or greater than the
current cut-off frequency 2 to pass.
Note: The cut-off frequency 1 must be smaller than the cut-off frequency 2.
Return
Format
The query returns LPAS, HPAS, BPAS, or BST.
Example
:MATH1:FILTer:TYPE LPASs /*Sets the filter type to LPASs.*/
:MATH1:FILTer:TYPE? /*The query returns LPAS.*/
:MATH<n>:FILTer:W1
Syntax :MATH<n>:FILTer:W1 <freq1>
:MATH<n>:FILTer:W1?
Description Sets or queries the cut-off frequency of Low Pass Filter/High Pass Filter; or the cut-off
frequency 1 of Band Pass Filter/Band Stop Filter. The default unit is Hz.
Parameter
Name
Type
Range
Default
<n>
Discrete
{1|2|3|4}
——
<freq1> Real
Refer to
Remarks
Related to the filter type
LPASs|BPASs|BSTop: 0.005×screen sample rate
HPASs: 0.1×screen sample rate
Remarks  When the filter type is set to LPASs (Low Pass Filter) or HPASs (High Pass Filter),
you need to set one cut-off frequency. At this time, the range of <freq1> is from
(0.005×screen sample rate) to (0.1×screen sample rate), at a step of
(0.005×screen sample rate). Wherein, screen sample rate = 100/horizontal time
base.
 When the filter type is set to BPASs (Band Pass Filter) or BSTop (Band Stop Filter),
you need to set two cut-off frequencies. Run this command to set the cut-off
frequency 1, and run the
:MATH<n>:FILTer:W2 command to set the cut-off
frequency 2. At this time, the range of <freq1> is from (0.005×screen sample rate)
to (0.095×screen sample rate), at a step of (0.005×screen sample rate). Wherein,
screen sample rate = 100/horizontal time base.
Note: The cut-off frequency 1 must be smaller than the cut-off frequency 2.
Return
Format
The query returns the current cut-off frequency or cut-off frequency 1 in scientific
notation.
Example :MATH1:FILTer:W1 1000000 /*Sets the cut-off frequency of Low Pass Filter to 1 MHz.*/
:MATH1:FILTer:W1? /*The query returns 1.000000E+6.*/