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Window Trigger
Windows trigger provides a high trigger level and a low trigger level. The
instrument triggers when the input signal passes through the high trigger level or
the low trigger level.
There are two kinds of window types: Absolute and Relative. They have different
trigger level adjustment methods. Under the Absolute window type, the lower and
the upper trigger levels can be adjusted respectively via the Level Knob; under
Relative window type, adjust the Center value to set the window center; adjust the
Delta value to set the window range, the lower and the upper trigger levels always
move together.
If the lower and the upper trigger levels are both within the waveform
amplitude range, the oscilloscope will trigger on both rising and falling edge.
If the upper trigger level is within the waveform amplitude range while the
lower trigger level is out of the waveform amplitude range, the oscilloscope
will trigger on rising edge only.
If the lower trigger level is within the waveform amplitude range while the
upper trigger level is out of the waveform amplitude range, the oscilloscope
will trigger on falling edge only.
To set window trigger via Absolute window type:
1. Press the Setup button on the front panel to enter the TRIGGER function menu.
2. Press the Type softkey; then use the Universal Knob to select Window and push
down the knob to confirm.
3. Press the Source softkey; turn the Universal Knob to select CH1 or CH2 as the
trigger source.
4. Press the Window Type softkey to select Absolute.
5. Press the Lower Upper softkey to select Lower or Upper trigger level; then turn
the Trigger Level 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 greater than the upper trigger level. In the
trigger state message box, L1 means the upper trigger level while L2 means
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