User`s guide

Making a Return Loss Measurement Getting Started with Return Loss

Agilent 81610A/11A/12A/13A/14A Return Loss Module, Fifth Edition 25

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 14

Figure 14 Termination Calibration - External source

or Figure 15 if you are using an internal source

(Agilent 81611A/2A/3A/4A Return Loss modules only).

Figure 15 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 8163A Lightwave MultimeterLaser

Source

Agilent 81113PC

8161x

8163A Lightwave Multimeter

Termination

Agilent 81113PC