Return Loss Measurement Return Loss Measurement
160 Agilent 8163A/B, 8164A/B, and 8166A/B User’s Guide, Fourth Edition
Termination Calibration
Use this procedure to calibrate the Return Loss module against a
terminated cable, that is when there are no reflections returning from
its end.
1 Making sure all the connectors are clean, set up the instrument as
shown in Figure 93 if you are using an External Source,
Figure 93 Termination Calibration - External source
or Figure 94 if you are using an internal source
(Agilent 81611A/2A/3A/4A Return Loss modules only).
Figure 94 Termination Calibration - Internal Source
NOTE If you are using a Fabry-Perot source, you must fix its output cable
to ensure minimum cable movement.
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
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