5-11
IM AQ7280-01EN
Optical Output and Optical Power Measurement
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2
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5
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8
Index
Measuring Optical Power Using the Power Checker (/PC option
of the OTDR unit)
Making Preparations for Measurements
Remove the optical fiber cables from the AQ7280 and close the optical connector covers, or make sure
that the OTDR port is not receiving any light, and then start the power checker zero-set procedure.
Performing Zero-Set
1.
From the top menu, select
Power Checker
to display the following screen.
Sets the reference to the currently
displayed measured value
Measured value
Bar graph display of
the measured value
See page 5-3.
Set the wavelength (1310nm,
1490nm, 1550nm, 1625nm, 1650nm).
Set the unit (dB, dBm, W).
Performs zero set
Upper threshold line
Lower threshold line
Lines showing the upper
and lower threshold values
Set the reference (–80 to 40 dBm).
The Reference box appears if you
press the DREF soft key or set the
unit to dB.
2.
Execute
zero-set
.
Note
• Perform a zero-set whenever necessary, such as after you have turned on the power or when the ambient
temperature changes. Performing a zero-set adjusts the internal deviation of the power checker section
and enables you to obtain more accurate absolute optical power values.
• You can also start the power checker feature from the OTDR display screen. For the procedure, see
section 2.10.
Setting the Screen Display and Measurement Conditions
Setting the Wavelength
Measurement light with the following wavelengths can be measured.
1310nm, 1490nm, 1550nm, 1625nm, 1650nm
Note
This is not available on port 2 of the AQ7283E and AQ7283F, or on the AQ7282M.
5.2 Measuring Optical Power (OPM, /PC option)