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RIGOL Chapter 5 To Trigger the Oscilloscope
5-26 MSO7000/DS7000 User's Guide
is higher than the preset high trigger level.
Falling: triggers on the falling edge of the input signal when the voltage level
is lower than the preset low trigger level.
Either: triggers on the rising or falling edge of the input signal when the
voltage level meets the preset trigger level.
Trigger Position:
After selecting the window type, press Position and then rotate the multifunction
knob
to select the trigger position so as to further specify the time point of
trigger. Press down the knob to select the trigger position. You can also press
Position continuously or enable the touch screen to select it.
Enter: triggers when the input signal enters the specified trigger level range.
Exit: triggers when the input signal exits the specified trigger level range.
Time: triggers when the accumulated hold time since the input signal entered
the specified trigger level range is equal to the window time. When this type is
selected, press Time and rotate the multifunction knob to set the window
time. You can also use the numeric keypad to set it. Its available range is from 8
ns to 10 s.
Level Selection and Adjustment of Trigger Level:
After the trigger condition setting is completed, you need to adjust the trigger level
to correctly trigger the signal and obtain a stable waveform. Press Level Select,
then rotate the multifunction knob
to select the desired level type for adjustment,
and then press down the knob to select the type. You can also press Level Select
continuously to select the level type or enable the touch screen to tap the desired
level type and select it.
Level A: only adjusts the upper limit of the trigger level, and the lower limit of
the trigger level remains unchanged.
Level B: only adjusts the lower limit of the trigger level, and the upper limit of
the trigger level remains unchanged.
Level AB: adjusts the upper and lower limits of the trigger level at the same time,
and the trigger level deviation (the difference between the upper limit and lower
limit of the trigger level) remains unchanged.
Note: In Window trigger, pressing Trigger LEVEL can quickly switch the
current level adjustment type.
Rotate the Trigger
LEVEL knob to adjust the corresponding trigger level. 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 and slope 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 △ indicates the trigger level
deviation). When you stopping modifying the trigger level, the trigger level line and
the trigger level information at the lower-left corner of the screen disappear in about
2 s. The current trigger level deviation is displayed at the upper-right corner of the
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