Teledyne LeCroy LabMaster 9Zi-A - Manual (Page 148)

LabMaster 9 Zi-A
140 922157-00 Rev A
Edge Trigger with Holdoff by Events (in this example, two events). The bold edges
on the trigger source indicate that a positive slope has been selected. The dashed,
upward-pointing arrows indicate potential triggers, while the bold ones show
where triggers actually occur after the holdoff expires.
Auxiliary Input Trigger
Some instrument models provide auxiliary input trigger capability. It's done
as a pattern trigger, on the Ext dialog.
Select X1, or ÷10. You can also select from DC50Ω, Gnd, and DC1MΩ
Impedance values.