Ideal Networks Serie 33-960 Cable tester, cable tester 33-960-3 User Manual
Product codes
33-960-3
Description of Event Types
108
IDEAL
Reflective Event
Reflective Event
Reflective faults appear as spikes in the fiber trace. They are caused by an
abrupt discontinuity in the index of refraction.
abrupt discontinuity in the index of refraction.
³
Reflective events cause a significant portion of the energy initially
launched into the fiber to be reflected back toward the source.
launched into the fiber to be reflected back toward the source.
³
Reflective events may indicate the presence of connectors,
mechanical splices, or even poor-quality fusion splices or cracks.
mechanical splices, or even poor-quality fusion splices or cracks.
³
A loss and a reflectance value are normally specified for reflective
events.
events.
³
When the reflective spike reaches the maximum level, its top may be
clipped due to the saturation of the detector. As a result, the dead
zone—or minimum distance for making a detection or attenuation
measurement between this event and a second nearby—may be
increased.
clipped due to the saturation of the detector. As a result, the dead
zone—or minimum distance for making a detection or attenuation
measurement between this event and a second nearby—may be
increased.
³
If you set thresholds, the applicationindicates a reflective event in the
events table, whenever a value exceeds reflectance or connector loss
threshold (see Setting Pass/Fail Thresholds on page 30).
events table, whenever a value exceeds reflectance or connector loss
threshold (see Setting Pass/Fail Thresholds on page 30).
Reflected
power (dB)
power (dB)
Distance
(km)
(km)
Reflective events
Clipped level