Digital Filter - UNI-T UPO2102 User Manual

User's Manual
Mark trace: Select spectrum wave as the marker source, which is the spectrum waveform

generated by different detection types under the detecting mode, it can set to normal, average,
maximum hold and minimum hold.
Maximum peak value: Set manual mark trace to the maximum peak value of sampling point by

default.
Note: If the selected mark trace is not display which means there are no mark point. It can be mark only
when the mark trace is displayed.
FFT Operation Tips
Signals with DC components or deviations can cause errors or deviations in the FFT waveform
components.
To reduce the DC component, the channel can be set to AC coupling.
To reduce the random noise and aliasing frequency components of the repetitive or single pulse,
user can set the oscilloscope acquisition mode to average acquisition.

15.3 Digital Filter

(1) Filter Type
a. Low pass：Only signal with the source frequency lower than the upper limit of the current frequency
are allowed to pass.
b. High pass：Only signal with the frequency higher than the lower limit of the current frequency are
allowed to pass.
c. Band pass： Only signal with the frequency higher than the lower limit of current frequency and lower
than upper limit of the current frequency are allowed to pass.
d. Band Limited：Only signal with the frequency lower than the lower limit of the current frequency or
higher than the upper limit of the current frequency are allowed to pass.
(2) The lower limit of frequency
Adjusting the Multipurpose knob to change the value of the lower limit of frequency. In low pass, the
lower limit of frequency is invalid and the menu is hidden.
(3) The upper limit of frequency
Adjusting the Multipurpose knob to change the value of the high limit of frequency. In high pass, the high
limit of frequency is invalid and the menu is hidden.
Note: The range of the upper/lower limit of frequency is related to the current horizontal time base.
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