Ceyear 4456 Series, Руководство пользователя

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Chapter VI Measurement System
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Chapter VI Measurement System
After the oscilloscope acquires, triggers and displays the waveform, the measurement can be carried out. It can
select functions including cursor, automatic measurement, statistics and histogram.
6.1 Parameter measurement
This oscilloscope provides automatic measurement of 30 kinds of waveform parameters and 12 kinds of
histogram parameters, as well as statistics and analysis of the measurement result. The time and voltage are the
two most basic measurements, and other measurement is based on one of the two basic measurements.
周期、频率、脉宽、占空比 上升时间、下降时间
时间差、相位差
Fig. 6.1 Time Parameter
The time parameters mainly include frequency, period, positive pulse width, negative pulse width, rise time, fall
time, duty cycle, delay and phase difference.
Period: The time between the intermediate threshold intersections of two consecutive homogeneous edges with
like polarity.
Frequency: The inverse of a period.
Positive pulse width: The time difference between the 50% threshold of the pulse Rise Edge and the 50%
threshold of the next Fall Edge.
Negative pulse width: The time difference between the 50% threshold of the pulse Fall Edge and the 50%
threshold of the next Rise Edge.
Positive duty cycle: The ratio between positive pulse width and period.
Negative duty cycle: The ratio between negative pulse width and period.
Rise time: The time taking for the signal amplitude to increase to a high reference level (90% by default) from a
low reference level (10% by default).
Fall time: The time taking for the signal amplitude to decrease to a low reference level (10% by default) from a
high reference level (90% by default).
Delay: The time difference between edges of two channels. If the source is CH1 and the delay source is CH2, it
means the time difference between CH1 and CH2.
Phase difference: The phase difference between the first Rise Edge of two channels. If the source is CH1 and the
phase is CH2, it means the phase difference between CH1 and CH2.
Period, Frequency, Pulse Width, Duty
Cycle
Rise time, Fall time Delay, Phase difference
90% or
80%
10% or
20%