CERTIFIBER ENGLISH - 29
Chapter 3 - Automatic
Measurements
Setting the Reference
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Accurate, repeatable measurements of optical
power and signal loss are fundamental for
the installation and maintenance of fiber
optics.
To make an accurate measurement, you need
to know the loss in your attached launch
cable and the power being transmitted.
The reference value must be
stored before a loss measure-
ment can be calculated.
CERTIFIBER requires the reference
value to compensate for the
signal loss in the launch cable.
This value is then subtracted
from the actual measured value
to determine loss.
Once the reference value is established,
consistent readings for loss, delay, and length
measurements are ensured.
Note
The launch cable used to set the reference
value should be the same type of fiber as the
cables to be tested and certified, either
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