Optical Time Domain Reflectometer AQ7275


This firmware is intended to upgrade the AQ7275 to the latest version.

How to check the current firmware version

  1. Press [F1] key (OTDR) at initial screen after turn on power.
  2. Press [F5] key (Next 1/2)
  3. Press [F4] key (System)
  4. Press [F1] key (Information). Version information is showed.


 In case updating firmware from less than R2.08 to R3.01 or later, internal memory must be formatted before update.
 Please do the file backup and memory format as following before update.

1. File backup;
 - File backup to PC with USB storage function *Ref. IM 19-1
 1) Turn on AQ7275
 2) Press [F1] key (OTDR)
 3) Press [SETUP]
 4) Press [F5] (System setup)
 5) Move the cursor to [USB]
 6) Select [Storage] by using [Enter] or rotary key
 7) Connect AQ7275 to PC with USB cable
 8) Copy the file in AQ7275 to PC by PC operation.

- File backup to USB memory *Ref. IM 18-2, 18-4
 1) Turn on AQ7275
 2) Press [F1] key (OTDR)
 3) Press [FILE]
 4) Press [F1] (Action)
 5) Select [Copy] or [Copy Folder] by using [Enter] or rotary key
 6) Copy the file to USB memory.

2. Format the internal memory;
 1) Turn on AQ7275
 2) Press [F1] key (OTDR)
 3) Press [FILE]
 4) Press [F1] (Action)
 5) Select [Format] by using [Enter] or rotary key
 4) Press [F5] (Format)

Revision History

Version Release Date Content
R03.09 Oct 22,2019

Improved functions

  • Improved storage connection function with Windows 10 computers.
R03.08 Sep 4,2015

Improved functions

  • Solved the problem when file overwrite.
R03.07 Apr 24,2013

Improved functions

  • Two selections available in memory initializing function.
       - initialize setting value.
       - initialize setting value and internal memory.

Previous version 



Please read Software Agreement carefully before downloading.


Version R03.09
Release Date Oct 22, 2019
File Name aq7275vup309.zip 4.5 MB


Type Firmware* Registration is required to download.


* Software Agreement
  • The property rights, proprietary rights, intellectual property rights, and all other rights associated with the software are held by Yokogawa Electric Corporation.
  • Under no circumstances is any dumping, reverse compiling, reverse assembly, reverse engineering, or any other kind of alteration or revision of this software allowed.
  • This software is offered free of charge, but no unlimited warranties are made against any defects whatsoever.
  • Also, Yokogawa may not be able to accept inquiries regarding repair of defects in or questions about this software.
  • The contents of this software are subject to change without prior notice as a result of continuing improvements to the software\'s performance and functions.
  • Yokogawa bears no liability for any problems that may occur during download or installation of this software.
  • Use of the Yokogawa Web site is at the user\'s own risk.
  • Any parties contributing to the creation or distribution of the contents on the Yokogawa Web site shall bear no responsibility whatsoever for any damages occurring as a result of the use of said contents.

Downloading of the software indicates acceptance of the software agreement.

Related Products & Solutions

Optical Time Domain Reflectometer AQ7275

The AQ7275 is one of the best selling OTDRs in the world. Model lineup has been expanded to a total of 9 models to choose from with a dynamic range of up to 45dB . Wavelength capability spans from 850nm (MMF) to 1650nm (SMF). An impressive 0.8m event dead zone makes this model an excellent choice for FTTH and metro, core networks.