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44
Chapter 9 Automatic Measurement
9.1 Parameter Measurement
UPO3000E series oscilloscope can automatically measure 34 kinds of
parameters.
Voltage:
Vmax: Voltage value from the highest point to GND.
Vmin: Voltage value from the lowest point to GND.
Vtop: Voltage value from the flat top to GND.
Vbase: Voltage value from the bottom to GND.
Middle: (Vtop + Vbase) / 2
Vpp: Vmax – Vmin
Vamp: Vtop – Vbase
Mean: Average amplitude of the waveform on screen
CycMean: Average amplitude of the waveform in one period
RMS: The effective value. According to the energy produced by the AC
signal in the conversion, the equivalent energy that the DC voltage
corresponds to.
CycRMS: The RMS of one period.
Time:
Period: Time between two consecutive, same-polarity edges of a repetitive
waveform.
Frequency: The reciprocal of the period
Rise time: Time needed for waveform amplitude rising from 10% to 90%.
Fall time: Time needed for waveform amplitude falling from 90% to 10%.
+Width: The width of a positive pulse at 50% amplitude
-Width: The width of a negative pulse at 50% amplitude
FRR: Time between the first rising edge of source 1 to the first rising edge
of source 2
FRF: Time between the first rising edge of source 1 to the first falling edge
of source 2
FFR: Time between the first falling edge of source 1 to the first rising edge
of source 2
FFF: Time between the first falling edge of source 1 to the first falling edge
of source 2
LRF: Time between the last rising edge of source 1 to the last falling edge
of source 2
LRR: Time between the last rising edge of source 1 to the last rising edge
of source 2
LFR: Time between the last falling edge of source 1 to the last rising edge
of source 2
LFF: Time between the last falling edge of source 1 to the last falling edge
of source 2
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