User Manual

28. Trigger Control
Trigger is to determine when Oscilloscope starts to acquire data and waveform display. Once trigger to be set
correctly then it will convert the unstable display to meaning waveform.
When Oscilloscope starts to acquire data it will acquire enough data to form waveform on left of trigger point.
Oscilloscope continues to acquire data when it waits for trigger condition happen. Once it detect out the trigger
it will acquire enough data continuously to form the waveform on right of trigger point.
Trigger control area include 1 knob and 4 menu keys.
Trigger level: trigger level knob to set signal voltage correspond to trigger point.
SET 50%: set trigger level in middle vertical point of trigger signal voltage range, this setting is disable at
the FFT mode.
Force trig: Force to a trigger signal and mainly to use in “Normal” and “Single” mode.
SET Zero: Trigger horizontal position set to Zero.
Trig menu: Press this key and panel display menu.
There are two trigger modes: single trigger and alternate trigger.
Single trigger: Use a trigger level to capture stable waveforms in two channels simultaneously
Alternate trigger: Trigger synchronous signals steadily. The two channels could acquire the
waveforms when the CH1 and CH2 are inputting two different frequency signals.
Single
Single trigger mode have edge trigger and video trigger, you can see different
trigger type for two vertical channels in this menu.
Edge
It happens when the trigger input passes through a given level along the set
direction.
Video
Carry out the field or line video trigger of the standard video signal.
Pulse
Use this trigger type to catch pulses with certain pulse width.
Slope
The oscilloscope begins to trigger according to the signal rising or falling speed.
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