10
meets the pre-set conditions. This action of capturing the waveform according to the
conditions is the trigger.
What does trigger do?
1.
Trigger can stabilize the waveform on the screen.
2.
Capture the segment of the waveform you want to observe.
The trigger supported by the oscilloscope is edge trigger, including rising edge
trigger and falling edge trigger.
6.1
Trigger level
In the edge trigger mode, the trigger condition appears only when the
waveform
crosses up or down the trigger level.
The trigger level is automatically adjusted by default. Here's how to adjust
manually:
a. In Menu-> Trigger, change "Trigger Level" to "Manual".
b. Press the “Shift” key, and then click the up and down keys to move the trigger
level.
The arrow circled above is the trigger level position, and when the edge of the
square wave in the above figure passes upwards through the position of this arrow, a
trigger is formed (the waveform only forms a trigger when it crosses the trigger level
up or down).
6.2
Trigger Sources
The small arrow on the right, yellow indicates that the trigger source is CH1, and
other color indicates that the trigger source is CH2. Which channel is used as a
trigger can stabilize the waveform of which channel, and two channels cannot be
triggered at the same time.
6.3
Trigger Mode
Trigger mode: automatic trigger, normal trigger, single trigger. Automatic
triggering is more commonly used. The normal trigger will not refresh the screen
when there is no waveform, suitable for measuring some pulse signals that come
occasionally, etc., and refresh the waveform once in a pulse. The single-trigger
procedure is described in 7.2 below.
