RIGOL DM3068 - Manual (Page 65)

RIGOL
DM3068 Quick Guide 21
5. Mount the front panel: aim the front panel opening at the front of instrument
and fix them using four M4 screws.
6. Load into machine cabinet: mount the rack with instrument-fixed onto a
standard 19-inch machine cabinet using four M6 screws and four M6 square nuts,
respectively.
7. Note the rock holds a height of 3U, holes in compliance with the arrow direction
are the mounting holes for rack.