Exfo MAX-700 Bedienungsanleitung Seite 327

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Maintenance
MAX-700 315
Verif ying Your MAX-700
To determine the measurement range (singlemode models only):
1. Connect the OTDR as indicated below. Other configurations are
possible, but the fiber should have several sections longer than 2 km,
with no loss greater than 8 dB and with the average attenuation not
exceeding 1 dB/km. A variable attenuator will be used to adjust the loss
in the span.
One or several non-reflective events with a nominal loss of 0.5 dB
should be present. Join a series of fiber reels between the OTDR and
the variable attenuator for a length of approximately 20 km. Join
another series of reels to complete the fiber length needed for the test.
Ensure that the OTDR port and connectors are correctly cleaned.
Make sure the fiber settings are accurate (IOR, Helix factor, and
RBS).
1 to M reels of fiber
( Add as needed )
OTDR
2 km or more
Fiber End
Measured
Fiber Even
t
4 km min
2 km or more
20 km
Variable attenuator
2km or more
2 km or more
Fiber end
1 to M reels of fiber
(Add as needed)
4 km min.
Measured fiber end
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