Yamasaki Y30 Series User Manual page 13

5.3.1 Initial Event
"Initial event" on the OTDR trace is the event that marks the starting point of optical fiber. Under
default conditions, "initial event" is located at the first event (usually it will be the first connector of the
OTDR) of the tested optical fiber. The event belongs to a reflection event.
5.3.2 End Event
"End event" on the OTDR trace is the event that marks the terminal of optical fiber. Under default
conditions, "end event" is located at the last event of the tested optical fiber. The event is called optical
fiber terminal event (usually be the end or fracture point of the tested optical fiber), which usually belongs
to a reflection event.
5.3.3 Reflection Event
When optical pulse energy is reflected (such as on the connector), reflection event occurs.
On the trace, reflection event is shown as peak signal, as shown in Fig.6-2.
Fig.6-2 Reflection Event
13