Chapter 9: Certify Fiber Cabling
Autotest in Loopback Mode
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Maximum loss for multimode TRCs: 0.15 dB
Maximum loss for singlemode TRCs: 0.25 dB
If the tester shows a warning, clean and inspect the
connectors on the TRC, make sure the cords do not have
tight bends, as shown in Figure 117, then do the TRC
verification again.
Step 3: Do an Autotest in Loopback Mode
WCaution
If you disconnected the test reference cord from the
output of the tester, you must set the reference
again to make sure your measurements are reliable.
3-1 On the SET REFERENCE screen, when the set reference or
TRC verification procedure is completed, tap NEXT to see
how to connect to the fiber under test.
3-2 Clean and inspect the connectors on the fiber under test.
3-3 Make the connections to do the test on the fiber, as shown on
the screen and in Figure 117, then press HOME.
3-4 Tap TEST on the main tester or press on the main or
remote tester.
If the CHECK FIBER CONNECTIONS screen shows an open
fiber:
Make sure that all connections are good and no fibers
have damage. Use the VFL to make sure the fiber under
test has continuity.
-continued-
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