Rigol DS1302CA User Manual page 70

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occur, the display becomes stable on the screen.
Any factor results in the un-stability of waveforms can be detected by Auto
Trigger, such as the output of Power supply.
NOTE: When horizontal control is set under 50 ms/div, Auto mode allows the
oscilloscope not to capture trigger signal.
Normal:

The Normal mode allows the oscilloscope to acquire a waveform only when it is
triggered. If no trigger occurs, the oscilloscope keeps waiting, and the previous
waveform, if any, will remain on the display.
Single:

In Single mode, after pressing the RUN/STOP key, the oscilloscope waits for
trigger. While the trigger occurs, the oscilloscope acquires one waveform then
stop.
3. Coupling:
Trigger coupling determines which signal component passing to the trigger circuit.
Coupling types include AC, DC, LF Reject and HF Reject.
AC: AC coupling blocks DC components.

DC: DC coupling passes both AC and DC components.

LF Reject: LF Reject coupling blocks DC component, and attenuates all signal

with a frequency lower than 8 kHz.
HF Reject: HF Reject coupling attenuates all signals with a frequency higher

than 150 kHz.
4. Pre-trigger/delayed trigger:
The data collected before and after trigger.
The trigger position is typically set at the horizontal center of the screen. In the
full-screen display the 6div data of pre-trigger and delayed trigger can be
surveyed. More data (14div) of pre-trigger and 1s delayed trigger can be
surveyed by adjusting the horizontal
This feature is very useful to study the events that led up to the trigger point.
Everything to the right of the trigger point is called post-trigger information. The
delay range (pre-trigger and post-trigger information) depends on the sweep
speed selected.
2-42
knob.
User‟s Guide for DS1000CA Series