Logic Operation - UNI-T UPO3000E Series User Manual

Window:
Window function, press the window key to select Hamming, Blackman,
Rectangle, or Hanning.
(1) Rectangle: It has the best frequency resolution and the worst amplitude
resolution, which is similar to the one with no window. It is suitable for
measuring the following
waveforms:
Transient or short pulse, the signal level is almost equal before and after this.
Equal amplitude sine wave with very similar frequency.
Wide-band random noise in a slowly changing spectrum.
(2) Hanning: Compared with the rectangle window , it has better frequency
resolution, but poorer amplitude resolution. It is suitable for measuring
sine, periodic and narrow-band random noise waveforms.
(3) Hamming: The frequency resolution is slightly better than that of Hanning
window, and it is suitable for measuring transient or short pulse, and the
waveform with great difference before and after the signal level.
(4) Blackman : It has the best amplitude resolution, and the worst frequency
resolution. It is suitable for measuring the single frequency signals or
seeking higher harmonics.
Vertical Unit:
The unit of the FFT operation result. Press vertical unit to select Vrms or
dBVrms. Vrms and dBVrms displays the vertical amplitude in a logarithmic
way and a linear way. If you need to display the FFT spectrum in a large
dynamic range, dBVrms is recommended.
Screen Setting:
Press the screen setting key to set full screen or split screen.
(1) Split screen: Displays the source waveform and the waveform of FFT
operation result separately.
(2) Full screen: Displays the source waveform and the FFT operation results
on the same window that you can observe the spectrum more clearly and
make more accurate measurements.
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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 ACcoupling.
To reduce the random noise and aliasing frequency components of the
repetitive or single pulse, you can set the oscilloscope acquisition mode
to average acquisition.

7.3 Logic Operation

Press MATH type and select logic operation to enter its menu.
Expression:
Press the Expression key to select AND, OR, NOT, XOR.
(1) AND: Performs "AND" logic operation for every point of source 1 and
source 2.
(2) OR: Performs "OR" logic operation for every point of source 1 and
source 2.
(3) NOT: Performs "NOT" logic operation for every point of source 1, source
2 will not be displayed at this moment.
(4) XOR: Performs "XOR" logic operation for every point of source 1 and
source 2.
Performs logic operations for all points of the source waveform voltage and
displays the results. During operation, when the source channel voltage
value is greater than the threshold value, it is determined as logic "1",
otherwise it is logic "0". Converting waveforms to binary for logical operations
is shown below: