Owon XDS4000 Series User Manual page 53

The oscilloscope triggers on the Nth edge that appears on the specified idle
time. As figure shown below, the oscilloscope should trigger on the second
falling edge after the specified idle time and the idle time should be set to
P1/P2/P3/P4 < Idle Time < M. Wherein, M, P1, P2, P3 and P4 are positive or
negative pulse width participating in the counting.
In Nth Edge Trigger mode, the trigger setting information is displayed on
bottom right of the screen, for example,
trigger type is Nth Edge, trigger source is CH1, -150V is up level or low level
threshold.
Nth Edge Trigger menu list:
MENU SETTING
Single
Nth Edge
Mode
CH1
CH2
Source
CH3
CH4
Edge
Edge
4.Advanced User Guidebook
Nth Edge Trigger
INSTRUCTION
Set vertical channel trigger type as Nth Edge
trigger.
Select CH1 as the trigger source
Select CH2 as the trigger source
Select CH3 as the trigger source
Select CH4 as the trigger source
Trigger on the rising edge of the input signal when
voltage level meets the specified trigger level.
Trigger on the falling edge of the input signal when
voltage level meets the specified trigger level.
47
, indicates that