UNI-T UPO1000CS Series, Руководство пользователя

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c.
≤≥：
It will be generated when the code duration is small than the setting upper time limit and
greater than the setting lower time limit, it can set the upper limit and the lower limit of time.
(3) The upper/lower limit of time
Compare the duration time with the setting time of
△
T, it will be triggered when the condition is
met. The range can be set to 8ns ~ 10s.
7.11 Setup/Hold Trigger
In setup/hold trigger, the oscilloscope need to set up the data signal line and clock signal line. The setup
time begins when the data signal crosses the trigger level and ends when the specified clock edge arrives.
The hold time begins when the specified clock edge arrives and ends when the data signal crosses the
trigger level again (as shown in Figure 7-8). The oscilloscope will trigger when the setup time or the hold
time is less than the preset time. It is mainly used to locate and find error code, and quickly find the signal
that
cannot meet setup hold time.
Figure 7-8
(1) Pattern
It has two modes H and L.
a. H
：
Set the valid code of the data signal to high level.
b. L
：
Set the valid code of the data signal to low level.
(2) Clock edge
Select the clock edge type: rising edge and falling edge.
a. Rising edge: Set the clock edge type to rising edge.
b. Falling edge: Set the clock edge type to falling edge.
data source
clock source
Data code type: H
Edge type: rising
edge
△
1 is Setup time
△
2 is Hold time
△
1
△
2