What is a Tunable Laser ? Tunable Lasers
Agilent 8163A/B, 8164A/B & 8166A/B Mainframes, Sixth Edition 127
How to Set the Laser to the Dark Position
Attenuator
If your tunable laser has an built-in optical attenuator, you can use
<Dark position> to block all laser light from the output. You can use this as
an alternative to disabling the laser. To enable/disable the dark position:
1 Move to the Tunable Laser channel and press the [Menu] softkey.
2 Move to the <Dark position> and press Enter. The Dark Position box appears.
3 Move to one of the following menu items:
– <On>, to enable the dark position, or
– <Off>, to disable the dark position
4 Press Enter to return to the Menu screen.
5 Press [Close] to exit from the Menu screen.
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