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28. How to set trigger system
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 start 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.
28.1. Trigger Control of PeakTech
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 nsynchronous signals steadily. The two channels could acquire the waveforms when
the CH1 and CH2 are inputting two different frequency signals.
28.2. Single trigger
Single trigger mode have edge trigger and video trigger, you can see different trigger type for two vertical
channels in this menu.
Edge Trigger:
It happens when the trigger input passes through a given level along the set direction.
Video Trigger: Carry out the field or line video trigger of the standard video signal.
Pulse Trigger : Use this trigger type to catch pulses with certain pulse width.
Slope Trigger : The oscilloscope begins to trigger according to the signal rising or falling speed.
The four trigger modes in Single Trigger are described respectively as follows:
28.2.1 Edge Trigger
Under the Edge Trigger mode, a trigger happens in the trigger threshold value of the input signal edge. When
the Edge Trigger is selected, a trigger will occur in the rising or falling edge of the input signal.
The Edge Trigger Menu is shown as Fig.37.
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