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stably triggering the waveform output from the transformer of a transformer
substation. It is mainly used in related measurements of the power industry.
8.2 Trigger LEVEL/Threshold Level
The adjustment of the trigger level/threshold level is related to the type of the trigger
source.
• When the trigger source is selected from CH1 to CH4, rotate the Trigger
LEVEL knob to adjust the trigger level. During the adjustment, a trigger level line
(the color of the trigger level line is the same as that of the channel) and a
trigger label "
" are displayed on the screen, and they move up and down with
the variation of the trigger level. When you stopping modifying the trigger level,
the trigger level line disappears in about 2 s. The current trigger level of is
displayed at the upper-right corner of the screen.
NOTE
In Runt Trigger, Slope Trigger, and Window trigger, you need to set the upper and lower
limits of the trigger level. Rotate the Trigger LEVEL knob to adjust the trigger level.
The difference between the current upper limit and lower limit of the trigger level is
displayed at the upper-right side of the screen. Two trigger level labels
and are
displayed at the left side of the screen. During the adjustment of trigger level, two trigger
level lines appear on the screen, and they move up and down with the change of the
trigger level. At the same time, the real-time trigger level information is displayed at the
lower-left corner of the screen (As shown in the figure below, H indicates the upper limit
of the trigger level, L indicates the lower limit of the trigger level, and â–³ indicates the
trigger level deviation).
• When the trigger source is EXT, rotate the Trigger LEVEL knob to adjust the
trigger level. The current trigger level of is displayed at the upper-right corner of
the screen.
NOTE
For this trigger source, only the variation of the trigger level value is displayed on the
screen during the adjustment of the trigger level, without displaying the trigger level
lines on the screen.
• When the trigger source is AC Line, there is no trigger level.
• When the trigger source is D0-D15, rotate the Trigger LEVEL knob to adjust
the threshold level. The current threshold level value is displayed at the upper-
To Trigger the Oscilloscope
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