Chapter 6 Operations and Measurements RIGOL
MSO4000/DS4000 User’s Guide 6-9
Digital Filter
MSO4000/DS4000 provides 4 types of digital filters (Low Pass Filter, High Pass Filter,
Band Pass Filter and Band Reject Filter). The frequencies within the specified
waveform segment of the signal can be filtered by setting the range of bandwidth.
1. Select digital filter
Press MATH Operate; turn the multifunction knob to select “Digital
filter” and press the knob. You can also press Operate continuously to switch to
"Digital filter".
2. Select the filter type
Press Filter Type; turn the multifunction knob to select the desired filter
type and press the knob. You can also press Filter Type continuously to switch
the filter type currently selected.
: low pass, namely only the signals whose frequencies are lower
than the current Upper Limit can pass the filter.
: high pass, namely only the signals whose frequencies are greater
than the current Lower Limit can pass the filter.
: band pass, namely only the signals whose frequencies are greater
than the current Lower Limit and lower than the current Upper Limit can
pass the filter.
: band reject, namely only the signals whose frequencies are lower
than the current Lower Limit or greater than the current Upper Limit can
pass the filter.
3. Select the source
Press Source; turn the multifunction knob to select the desired channel and
press the knob. You can also press Source continuously to switch the channel
currently selected. You can select CH1, CH2, CH3 or CH4.
4. Set the bandwidth
When “low pass” filter type is selected, you only need to set the frequency upper
limit; when “high pass” filter type is selected, you only need to set the frequency
lower limit; when “band pass” or “band reject” filter type is selected, you need
to set both the frequency upper limit and lower limit.
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