User`s guide

Definition of Terms Specifications
Agilent 81610A/11A/12A/13A/14A Return Loss Module, Fifth Edition 51
Definition of Terms
This section defines terms that are used both in this chapter and .
Generally, all specifications apply for the given environmental
conditions and after warmup time.
Measurement principles are indicated. Alternative measurement
principles of equal value are also acceptable.
Return Loss
The ratio between incident optical power P
in
and reflected optical
power P
back
of an optical component is called return loss, symbol RL,
expressed in dB :
Return loss of the reference cable
The return loss of the reference cable is defined as the return loss
caused by the reflection from the surface of its straight end (reference
surface).
Conditions: The reference surface shall never be brought into physical
contact with anything, to avoid mechanical damage (no physical
connection!). Temperature and wavelength ranges as specified.
NOTE The return loss of the reference cable is defined by the transition from
the reference surface to air.
Dynamic Range
The range of return losses for which the specified uncertainties apply,
with a lower limit of 0 dB (corresponds to an upper limit of 100 %
reflection).
Conditions: As specified.
5/ dB[]10
3
LQ
3
EDFN
------------- 3
LQ
=dBm[]3
EDFN
– dBm[]log=