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4.Advanced User Guidebook
27
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 four trigger types: single trigger, alternate trigger, logic
trigger and bus trigger. Each type of trigger has different sub menus.
Two ways to enter trigger mode:
Key operation: Press Trigger Menu panel button, then bottom menu Trigger Type,
select Single, ALT, Logic or Bus Trigger on the popup right
menus, rotate M knob to choose different trigger types.
Single trigger: Use a trigger level to capture stable waveforms in two channels
simultaneously.
Alternate trigger: Trigger on non-synchronized signals.
Logic trigger: Trigger the signal according to the condition of logic relationship.
Bus trigger: Set bus timing trigger.
The Single Trigger, Alternate Trigger, Logic Trigger and Bus Trigger menus
are described respectively as follows:
Single Trigger
Single trigger has eight types: edge trigger, video trigger, slope trigger, pulse 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.
Slope Trigger: The oscilloscope begins to trigger according to the signal rising or
falling speed.
Pulse Trigger: Find pulses with certain widths.
Runt Trigger: Trigger pulses that pass through one trigger level but fail to pass
through the other trigger level.
Windows Trigger: Provide a high trigger level and low trigger level, the oscilloscope
triggers when the input signal passes through the high trigger level or
the low trigger level.
Timeout Trigger: The oscilloscope triggers when the time interval from when the
rising edge (or the falling edge) passes through the trigger level to
when the neighbouring falling edge (or the rising edge) passes
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