RIGOL MSO/DS1000Z Series - Manual (Page 78)

RIGOL Chapter 5 To Trigger the Oscilloscope
5-4 MSO1000Z/DS1000Z User’s Guide
Trigger Coupling
Trigger coupling decides which kind of components will be transmitted to the trigger
module. Please distinguish it from "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) at the
front panel to select the desired coupling type (the default is DC).
Note: Trigger coupling is only valid in edge trigger.