Certifying Fiber Optic Cabling
Autotest in Loopback Mode
7-33
7
A
The overall result for the test.
B
Overall results for the fiber (E is PASS, F is FAIL):
•
Loss (Output -> Input): Loss on the fiber connected
between the tester’s output and input ports.
•
Length: The length of the fiber between the tester’s
output and input ports. To see the propagation
delay, select the length result.
•
Propagation delay is the time taken for a signal to
travel between the tester’s output and input ports.
Propagation delay is measured in nanoseconds (ns).
C
The overall result for the loss measurement.
D
The measured loss for the fiber.
Note
If loss is negative, set the reference again and retest
the cabling. See page 9-3 for more information on
negative loss.
E
The maximum loss allowed by the selected test limit.
F
The difference between the limit and the measured loss.
Margin is negative if the loss exceeded the limit.
G
Loss meters for the two wavelengths. Values in the red
zone exceed the selected test limit.
H
Press L View Ref. to view the reference information.
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