i
 IM AQ6375E-02EN
Thank you for purchasing the AQ6375E Optical Spectrum Analyzer. This instrument enables high 
speed measurement of the optical properties of LD and LED light sources, optical amps, and other 
devices.
This getting started guide primarily explains the handling precautions and basic operations of this 
instrument. For correct operation, please read this manual thoroughly before use. After reading this 
manual, keep it in a convenient location for quick reference in the event a question arises during 
operation. The manuals for this instrument are listed on the next page. Please read all manuals.
Contact information of Yokogawa offices worldwide is provided on the following sheet.
Document No. Description
PIM 113-01Z2 List of worldwide contacts
Notes
•  The contents of this manual are subject to change without prior notice as a result of 
improvements to the instrument’s performance and functionality. Refer to our website to view our 
latest manuals.
•  The figures given in this manual may differ from those that actually appear on your screen.
•  Every effort has been made in the preparation of this manual to ensure the accuracy of its 
contents. However, should you have any questions or find any errors, please contact your 
nearest YOKOGAWA dealer.
•  Copying or reproducing all or any part of the contents of this manual without the permission of 
YOKOGAWA is strictly prohibited.
Trademarks
•  Microsoft, Windows, Windows 10, Windows 11, and MS-DOS are registered trademarks or 
trademarks of Microsoft Corporation in the United States and/or other countries.
•  Adobe and Acrobat are registered trademarks or trademarks of Adobe Systems incorporated.
•  In this manual, the ® and TM symbols do not accompany their respective registered trademark 
or trademark names.
•  Other company and product names are registered trademarks or trademarks of their respective 
companies.
Updating the Firmware
It is recommended to update the firmware to the latest version to improve the features and usability 
of this instrument. Download the latest firmware from the YOKOGAWA website, or contact your 
nearest YOKOGAWA dealer for details.
Revisions
•  October 2022    1st Edition
•  March 2023    2nd Edition
2nd Edition: March 2023 (YMI)
All Rights Reserved, Copyright © 2022 Yokogawa Test & Measurement Corporation