User Manual

5 To Trigger the Oscilloscope RIGOL
MSO4000D/S4000 User’s Guide
5-5
Trigger Coupling
The trigger coupling setting determines the type of signal components that will be
transmitted to the trigger circuit. This is similar to the settings of “Channel
Coupling” but is specific to the triggered signal only.
 DC: allow DC and AC components into the trigger path.
 AC: block all the DC components and attenuate signals lower than 8 Hz.
 LF reject: block the DC components and reject the low frequency components
(lower than 5 kHz).
 HF reject: reject the high frequency components (higher than 50 kHz).
Press MENU  Setting  Coupling in the trigger control area (TRIGGER) at the
front panel to select the desired coupling type (the default is DC).
Note: Trigger coupling is invalid in the video trigger mode.