Return Loss Measurement Return Loss Measurement
Agilent 8163A/B, 8164A/B & 8166A/B Mainframes, Sixth Edition 179
1 Making sure all the connectors are clean, set up the instrument as shown in
Figure 96 if you are using an External Source,
Figure 96 Termination Calibration - External source
or Figure 97 if you are using an internal source
(Agilent 81611A/2A/3A/4A Return Loss modules only).
Figure 97 Termination Calibration - Internal Source
2 Terminate the cable 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 Press [Menu] to access the menu.
4 Move to <Terminated calibration> and press Enter. The instrument measures
the power reflected by the cable, and sets the [Para] values used by the Return
Loss monitor’s power sensor and monitor diode.
Tip: An alternative steps 3 and 4 is to select the Return Loss module’s
[Details] screen, then press [TermCal].
Termination
8161x 8163B Lightwave MultimeterLaser
Source
Agilent 81113PC
Agilent 81113PC
8161x
8163B Lightwave Multimeter
Termination
Agilent 81113PC
If you are using a Fabry-Perot source, you must fix its output cable to
ensure minimum cable movement.
NOTE