Laser Sources How to Use Laser Source Modules
94 Agilent 8163A Lightwave Multimeter, Agilent 8164A Lightwave Measurement 
System, & Agilent 8166A Lightwave Multichannel System, Fourth Edition
NOTE For further information on modulating the optical output of a dual-wavelength 
laser source module, see “How to Modulate Dual-Wavelength Laser Source 
Modules” on page 97.
How to Enable/Disable Laser Output
To enable laser output using the user interface:
1 Move to [State] parameter and press Enter. 
2 Move to [On], by using the cursor key, and press Enter. The green LED on the 
module front panel switches on.
To disable laser output using the user interface:
1 Move to [State] parameter and press Enter. 
2 Move to [Off], by using the cursor key, and press Enter. The green LED on the 
module front panel switches off.
Figure 61 Dual-Wavelength Laser Source Outputs Both Wavelengths