Ideal Networks Serie 33-960 Cable tester, cable tester 33-960-3MB User Manual

Description of Event Types

100

IDEAL

Non-Reflective Event 

This event is characterized by a sudden decrease in the Rayleigh 
backscatter signal level. It appears as a discontinuity in the downward 
slope of the trace signal.

³

This event is often caused by splices, macrobends, or microbends in 
the fiber.

³

A loss value is specified for non-reflective events. There is no 
reflectance specified for this type of event.

³

If you set thresholds, the application indicates a non-reflective event in 
the events table, whenever a value exceeds the loss threshold (see 
Setting Pass/Fail Thresholds on page 30).

Reflected power 
(dB)

Distance
(km)

Non-reflective 
event

Linear downward slope 
due to Rayleigh 
backscatter