Instructions

Digital Storage Oscilloscope 27
2.7.6 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.
 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.
1. Press the [Trig Menu] 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~CH4 as the trigger
source.
4. Press Level softkey to select Lower or Upper trigger level or both 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.
2.7.7 Pattern Trigger
Identify a trigger condition by looking for a specified pattern. This pattern is a logical
"AND" or “Or” combination of channels. Each channel can have a value of high (1), low
(0) or don't care (X). A rising, falling edge, rising or falling can be specified for one