User Manual

RIGOL 3 To Set the Horizontal System
DS4000 User’s Guide
3-10
Horizontal Reference
Horizontal reference is the reference position according to which the screen
waveform expands and compresses horizontally when adjusting HORIZONTAL
SCALE. In Y-T mode (this function is not available in X-Y mode and Roll mode), press
MENU  HorRef in the horizontal control area (HORIZONTAL) to select the desired
reference mode and the default is “Center”.
1. The Center of the Screen
When changing the horizontal time base, the waveform expands or compresses
horizontally around the center of the screen.
2. Trigger Position
When changing the horizontal time base, the waveform expands or compresses
horizontally around the trigger point.
3. User-defined
When changing the horizontal time base, the waveform expands or compresses