Aegis OSC-9200, Руководство пользователя

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Window Trigger
The window trigger mode has a high trigger level and a low trigger level. The instrument triggers when
the input signal passes through either trigger level.
There are two kinds of window types: Absolute and Relative. They have different trigger level
adjustment methods. Under Absolute window type, the lower and the upper trigger levels can be
adjusted with the Level knob; under Relative window type, you instead set the center of the window,
and then a “delta” value. The upper trigger level is the center plus delta; the lower trigger level is
center minus delta.
l
If the lower and the upper trigger levels are both within the triggering range, the oscilloscope will
trigger on both rising and falling edges.
l
Suppose the upper trigger level is within the triggering range while the lower trigger level is out
of the triggering range. In that case, the oscilloscope will trigger on rising edge only.
To set absolute window triggers:
1. Press Trigger Setup on the front panel to enter the TRIGGER function menu.
2. Press the Type F key; then use the Universal Knob to select Window and push down the knob
to confirm.
3. Press the Source F key; turn the Universal Knob to select CH1 or CH2 as the trigger source.
4. Press the Window Type F key to select Absolute.
5. Press the Lower Upper F key to select Lower or Upper trigger level; then press Trigger Level
and turn the Universal Knob to adjust the position. The trigger level values are displayed at the
upper right corner of the screen.
The lower trigger level cannot be higher than the upper trigger level.