EXFO FTB-7000 OTDR for FTB-200 v2 - Manual (Page 127)

Analyzing Traces and Events
OTDR 113
Events Tab
The events table lists all the events detected on the fiber. An event can be
defined as the point at which change in the transmission properties of light
can be measured. Events can consist of losses due to transmission, splices,
connectors or breaks. If the event is not within the established thresholds,
its status will be set to “fail”.
In Template mode, the events table shows the events of the main trace.
If you press and hold the row corresponding to a specific event or fiber
section for a few seconds, the application will display a tooltip identifying
the item (for example, Non-reflective fault). In the case of a merged event,
you will also see details about the “sub-events”.
If an asterisk appears next to the event symbol, the tooltip will also show
“(*:Modified)” to indicate that this event has been modified manually.
If the asterisk appears next to the event number, “(*:Added)” will appear to
indicate that this event has been inserted manually.
For each item listed in the events table, information is displayed:
³
Type: Various symbols are used to describe different event types. For a
more detailed description of symbols, see Description of Event Types
on page 297.
³
Number: Event number (a sequential number assigned by the OTDR
test application) or, in parentheses, the length of a fiber section (the
distance between two events).
³
Loc.: Location; that is, distance between the OTDR and the measured
event or between the event and the beginning of the fiber span.
³
Loss: Loss in dB for each event or fiber section (calculated by the
application).
Tooltip identifying the
selected item