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How to Set the Trigger/Decoding System
Trigger determines when DSO starts to acquire data and display
waveform. Once trigger is set correctly, it can convert the unstable display
to meaningful waveform.
When DSO starts to acquire data, it will collect enough data to draw
waveform on left of trigger point. DSO continues to acquire data while
waiting for trigger condition to occur. Once it detects a trigger it will acquire
enough data continuously to draw the waveform on right of trigger point.
Trigger control area consists of 1 knob and 2 menu buttons.
Trigger Level: The knob that set the trigger level; push the knob and the
level will be set as the vertical mid point values of the amplitude of
the trigger signal.
Force: Force to create a trigger signal and the function is mainly used in
"Normal" and "Single" mode.
Trigger Menu: The button that activates the trigger control menu.
Trigger Control
The oscilloscope provides three trigger types: single trigger, logic trigger
and bus trigger. Each type of trigger has different sub menus.
Press Trigger Menu panel button, then bottom menu Trigger Type, select
Single, Logic or Bus Trigger on the popup right menus, turn the M knob to
choose different trigger types.
Single trigger: Use a trigger level to capture stable waveforms in two
Logic trigger: Trigger the signal according to the condition of logic
Bus trigger: Set bus timing trigger.
The Single Trigger, Logic Trigger and Bus Trigger menus are
described respectively as follows:
Single Trigger
Single trigger has eight types: edge trigger, video trigger, pulse trigger, slope
trigger, runt trigger, windows trigger, timeout trigger and Nth edge trigger.
Edge Trigger: It occurs when the trigger input passes through a specified
voltage level with the specified slope.
Video Trigger: Trigger on fields or lines for standard video signal.
Pulse Trigger: Find pulses with certain widths.
4.Advanced User Guidebook
channels simultaneously.
relationship.
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