Trigger Coupling - Rigol DS2000E Series User Manual

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Normal:
In this trigger mode, the oscilloscope triggers and samples data only when the
specified trigger condition is found.
This trigger mode should be used when the signal is with low repetition rate or only
the event specified by the trigger setting needs to be sampled as well as when auto
trigger should be prevented to acquire stable display.
Single:
In this trigger mode, the oscilloscope performs a single trigger and acquisition when
the specified trigger condition is found and then stops.
This trigger mode should be used when you need to perform a single acquisition of
the specified event and analyze the acquisition result (you can pan and zoom the
waveform currently displayed and the subsequent waveform data will not overwrite
the current waveform).
Note: In Normal and Single trigger modes, pressing FORCE can force a trigger.

Trigger Coupling

Trigger coupling decides which kind of components will be transmitted to the trigger
module. Please distinguish it with "Channel Coupling".
DC: allow DC and AC components into the trigger path.

AC: block all the DC components and attenuate signals lower than 75 Hz.

LF Reject: block the DC components and reject the low frequency components

(lower than 75 kHz).
HF Reject: reject the high frequency components (higher than 75 kHz).

Press MENU  Setting  Coupling in the trigger control area (TRIGGER) on the
front panel to select the desired coupling type (the default is DC).
Note: Trigger coupling is only valid in edge trigger and when the trigger source is
CH1 or CH2.
5-4
Chapter 5 To Trigger the Oscilloscope
DS2000E User's Guide