Exfo FOT-930 Multifunction Loss Tester Manual do Utilizador descarregar pdf (Página 51)

Measuring Optical Return Loss

Multifunction Loss Tester 43

Performing and Saving ORL Measurements

4. Terminate the fiber as close as possible before the component under

test. Wrap it at least 10 turns around a mandrel or small diameter tool,

adding turns until the reading stabilizes.

5. Press OK to save the ORL zero value, then remove the termination.

To revert to the factory-default ORL zero value:

1. Press Menu, then select ORL Meter.

2. Press Default ORL Zero (F1/F2 key).

Performing and Saving ORL Measurements

You can define ORL thresholds (see Setting Pass/Fail Thresholds on

page 26) before or after measuring ORL. ORL values below thresholds are

displayed in red.

To me asur e OR L:

1. If necessary, perform an offset nulling (see Nulling Electrical Offsets on

page 32).

2. Press Menu, then select ORL Meter.

3. Press Wavelength (F1/F2 key) to select a singlemode wavelength.

4. Verify your patchcords and clean them properly (see Cleaning and

Connecting Optical Fibers on page 22).

Note: If the F

ASTEST SM port of your unit is equipped with an APC connector, use

EXFO’s optional ORL calibrated patchcord.

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Exfo FOT-930 Multifunction Loss Tester Manual do Utilizador Página 51