58
5
Trigger
Figure 42 - Trigger
Setup: Press this button to open the trigger menu. This menu lets you control
how the oscilloscope's capture system decides when to capture a waveform.
This oscilloscope provides a variety of trigger types: Edge, Slope, Pulse, Video,
Window, Interval, Dropout, Runt, Pattern and Serial Bus
(I2C/SPI/UART/RS232/CAN/LIN).
Auto: Auto triggering is a triggering method that always lets you see a trace on
the screen. If the normal triggering scheme does not trigger after a certain time,
the oscilloscope generates a trigger.
Normal: Normal triggering has the oscilloscope trigger (i.e., capture the
waveform into memory and display it) when the trigger conditions are met. After
the waveform is displayed, the oscilloscope arms the trigger and waits for
another trigger event and displays the next waveform when triggered.
Single: This is the same as normal triggering except the trigger is disabled after
the first waveform is captured. This allows you to see the details of the waveform
that caused the trigger. It is useful for capturing transient events that don't
repeat.
Trigger Level Knob: Sets the voltage or current level that the oscilloscope will
trigger at. This trigger level is displayed in the upper right portion of the display.
Press the knob to set the trigger level to 50% of waveform's amplitude.
5.1
Overview of triggering
The trigger determines when the oscilloscope starts to acquire data and display a waveform.
When a trigger is set up properly, the oscilloscope converts unstable displays or blank screens
into meaningful waveforms
