This procedure describes the use of an optical time-domain
reflectometer (OTDR) to indirectly measure the loss and reflectance
of a splice or connector.
Loss or reflectance measurements may be obtained also by using
FOTP-34 or FOTP-107. The latter values will be accepted as correct
in the event of a dispute.
Some OTDR/fiber combinations appear to give "noisy" traces that
may be repeatable for a given OTDR but not against other OTDRs with
the same fiber. These appear to be related to polarization and
coherence effects, and are being studied in FO-6.6. Some OTDR
manufacturers offer noise filters, internal or external to the
OTDR, and care shall be taken that these do not mask "true"
artifacts of the trace. Moreover, parts of the trace that are noisy
due to low signal-to-noise ratio shall not be used.
Customers who purchased TIA-455-8 have also purchased
TIA-455-78 : FOTP-78 IEC 60793-1-40 OPTICAL FIBERS - PART 1-40: MEASUREMENT METHODS AND TEST PROCEDURES - ATTENUATION
TIA-455-107 : FOTP-107 DETERMINATION OF COMPONENT REFLECTANCE OR LINK/SYSTEM RETURN LOSS USING A LOSS TEST SET (ALSO SEE NECA NEIS 301)
TIA-526-14 : OPTICAL POWER LOSS MEASUREMENTS OF INSTALLED MULTIMODE FIBER CABLE PLANT; IEC 61280-4-1 EDITION 2, FIBRE-OPTIC COMMUNICATIONS SUBSYSTEM TEST PROCEDURE - PART 4-1: INSTALLED CABLE-PLANT MULTIMODE ATTENUATION MEASUREMENT *** SEE ALSO TIA-526 SERIES ***
TIA-526-7 : OFSTP-7 MEASUREMENT OF OPTICAL POWER LOSS OF INSTALLED SINGLE-MODEFIBER CABLE PLANT