UNI-T UTD2000M, Operating Manual

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UTD2000M User Manual
Digital Filtering Function
Fig. 2 ‐ 16 Digital Filtering
Table 2 ‐ 5: Digital Filtering Menu
Menu Setting Description
Type Digital Filtering Digital Filtering
信源
Signal Source
CH1
CH2
Set CH1 as the object of filtering
Set CH2 as the object of filtering
Filter Type Low ‐ pass
High ‐ pass
band ‐ pass
Set the filter to be low ‐ pass filtering
Set the filter to be high ‐ pass filtering
Set the filter to be band ‐ pass filtering
Frequency ‐ Lower
limit
―――
Only effective during high ‐ pass filtering or band ‐ pass filtering;
use “MULTIPURPOSE” knob to set lower limit of frequency
Frequency –upper
limit
―――
Only effective during low ‐ pass filtering or band ‐ pass filtering;
use “MULTIPURPOSE” knob to set lower limit of frequency
Definition
FFT Resolution: it is defined as the quotient of a division between sampling rate and operating points. In case of
a fixed operating points, the lower the sampling rate, the better the FFT resolution.
Nyquist frequency : For a waveform with the maximum frequency of f, the original waveform can only be built
with the use of a sampling rate that is at least 2f. This is also referred to as Nyquist Code. The “f” here is Nyquist
frequency, while the “2f” is Nyquist sampling rate.
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