Mathematical Function - UNI-T UPO2102 User Manual

User's Manual

15.1 Mathematical Function

Use operator"+" ,"-","x","÷" to operating the channel waveform to get the math waveform.
(1) Operator
Operator supports "+" ,"-","x","÷".
+：The waveform of source 1 and source 2 are added point by point.
a.
-：The waveform of source 1 and source 2 are subtracted point by point.
b.
x：The waveform of source 1 and source 2 are multiplied point by point.
c.
÷：The waveform of source 1 and source 2 are divided point by point.
d.
15.2 FFT
Using FFT (Fast Fourier Transform) mathematical operations, the time domain signal (YT) can be converted
into frequency domain signal. The following types of signals can be easily observed by using FFT:
Harmonic content and distortion in measurement system；

Perform the noise feature in DC power supply；

Vibration Analysis；

(1) Vertical Unit
The unit of the FFT operation result can select Vrms and dBVrms. Vrms and dBVrms display the vertical
amplitude size in a linear way and decibel volts way. If the FFT spectrum need to display in a large
dynamic range, dBVrms is recommended.
(2) Frequency Range
a. Range
Start Frequency：Set the start sweep frequency of FTT.

End of Frequency：Set the end sweep frequency of FTT.

Reference Frequency: Automatically set start frequency, end of frequency to a fit value for

observing the distinct sampling point of peak in FFT waveform.
b. Bandwidth
Center Frequency：Set the center frequency of the FFT waveform and the FFT waveform will be

changed accordingly.
Bandwidth: Set the bandwidth of FTT sweep.

Reference Frequency: Set the center frequency of the FFT waveform and the FFT waveform will

be changed accordingly.
(3) Count
Perform a data count of FFT operation, it can set to auto,1K, 2K, 4K, 8K, 16K, 32K, 64K, 128K, 256K,
512K, 1024K, 2048K and 4096K.
(4) Window
Window function can select Hamming, Blackman, Rectangle or Hanning.
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