EXFO IQS-12002B Calibration System - Manual (Page 72)

Calibration Methods
68 IQS-12002B
FTB-7000D and FTB-7000B-B OTDR Modules
FTB-7000D and FTB-7000B-B OTDR Modules
Calibration of the FTB-7000D OTDR includes the event and attenuation
dead zones, dynamic range, injection levels, linearity, front connector
position, and distance. Calibration of the FTB-7000B-B family, includes test
or verification of event and attenuation dead zones, dynamic range,
injection level, and distance.
The verification of the technical specifications such as dead zones,
linearity, and dynamic range are more a validation of the expected
instrument performance. However, for an OTDR to produce accurate
distance measurements, a calibration is required and may include some
adjustments.
For any test or calibration, make sure that the front connector of the OTDR
is clean and does not present scratches. If the connector is damaged, it
must be replaced, and Repair must be selected in the Work type box (refer
to step 7 on page 32) of the IQS-12002B application: no measurements, for
which the results would appear in the “As found” section of the report, will
be performed.
Note: All measurements performed on the FTB-7000B-B are to be manually done
and entered as per the instructions given in the IQS-12002B system.