EXFO IQS-2400 WDM Laser Source for IQS-500/600 - Manual (Page 49)

Operating the WDM Laser Source
WDM Laser Source 43
Correcting the Output Power Level
Correcting the Output Power Level
Although the module is precisely calibrated, the actual output power level
may slightly drift over time due to connector usage and laser aging. When
this occurs, you can use the power calibration option to adjust the output
power level to its actual value, as measured using a calibrated power
meter.
Correcting the source output power level is only possible in Normal mode.
If you are controlling multiple IQS-2400 WDM Laser Source modules, you
will have to adjust each source output power level individually (use the
Control Single Instrument button to switch to the appropriate tab).
To correct the output power level:
1. Use a reference patchcord with a known insertion loss and make sure
it has been properly cleaned at both ends.
2. Connect the patchcord between a calibrated power meter and the
source port.
3. Make sure you activated the source at least one hour before correcting
the output power level. For more information, see Activating and
Deactivating the Source on page 41.