Firmware Upgrade Process Firmware Upgrades
Agilent 8163A Lightwave Multimeter, Agilent 8164A Lightwave Measurement System, & Agilent 8166A Lightwave 
Multichannel System, Fourth Edition
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Firmware Upgrade Process
You may need to upgrade firmware because:
• You may need to use new modules that cannot work without the newest 
firmware. Your instrument will generate an error message if you try to insert a 
module that is not supported by your instrument’s current firmware.
• New revisions of the Agilent 816x VXIplug&play Instrument Driver require 
the newest firmware revision. The Agilent 816x VXIplug&play Instrument 
Driver is supplied on the same Support Disk as firmware upgrades.
• To enhance the usability and functionality of your instrument. New features 
may be available with new firmware revisions.
How to Get a Firmware Upgrade
Receive a Support Disk with New Modules
The latest edition of the Support Disk is shipped with all modules and 
mainframes. The Support Disk is a compact disk that contains the latest revisions 
of the following software and utilities:
• Firmware Upgrades for mainframes and modules,
• the Agilent 816x VXIplug&play Instrument Driver, and 
• User’s Guides for mainframes and modules, including the Programming 
Guide.
Download Firmware Upgrade from Internet
You can also download, free of charge, the new Firmware Upgrade  for your 
instrument by accessing http://www.agilent.com/, clicking on 
<Services and Support> on the left-hand side of the screen, clicking on 
<Technical Support> underneath the "Test and Measurement" heading, clicking 
on <Software Updates and Firmware Upgrades>, and then clicking on 
<Fiber Optic Test Equipment Software and Firmware Upgrades>.