User`s guide

Getting Started with Return Loss Making a Return Loss Measurement
30 Agilent 81610A/11A/12A/13A/14A Return Loss Module, Fifth Edition
Figure 22 Measuring the Termination Parameter - External Source
or Figure 23 if you are using an internal source
(Agilent 81611A/2A/3A/4A Return Loss modules only).
Figure 23 Measuring the Termination Parameter - Internal Source
2 Terminate the measurement patchcord so that there are no
reflections coming from the end.
TIP You can do this by wrapping the fiber five times around the shaft of
a screwdriver (or some similar object with a diameter of between
5mm and 7mm).
3 Move to <Terminated calibration> and press Enter. The instrument
measures the power reflected by the component, and sets the
[Para] values used by the Return Loss monitor’s power sensor and
monitor diode.
8161x
8163A Lightwave Multimeter
Termination
measurement patchcord