AQ7280 Modular Optical Time Domain Reflectometer

Responding to the growing needs for reliable and ease-of-use field test instruments for installation and maintenance of fiber optic networks, Yokogawa AQ7280 Optical Time Domain Reflectometer (OTDR) is designed to empower field technicians to make fast and precise measurements with confidence. The AQ7280 satisfies a broad range of test and measurement needs in analyzing optical networks from access to core.

The AQ7280 is the most flexible OTDR in our lineup due to a modular platform to create a variety of systems from a basic unit to units with filtered ports to test live traffic networks in applications from long haul, to metro, core and FTTH.

35+ years of OTDR expertise has enabled us to offer a unique multi-tasking feature that allows four distinct fibers to be tested simultaneously. Its intuitive icon-based touchscreen lets users perform measurements with ease, and the 15-hour battery life ensures uninterrupted usage in the field where the data can be conveniently transferred wirelessly.

Find AQ7280 OTDR Training Module under Resources.

Request a quote for OTDR prices.

Single Mode OTDR to Multi Mode OTDR

12 OTDR units ranging from single mode to multi mode, from low dynamic range to ultra-high dynamic range, and 2 wavelengths to 4 wavelengths.

Selection of power sensor, light source, optical fiber core inspector probe, visible light source for instrument customization based on users’ needs.


The AQ7280 satisfies a broad range of test and measurement needs in analyzing optical networks from access to core.
The AQ7280 OTDR delivers:

  • Reliability: Robust design for operating under harsh field conditions. Proven operating system assuring stability, prompt response, and superior protection against software virus attacks.
  • Ease-Of-Use: Dual operation mode by multi-touch touchscreen and hard-key buttons. Fully automatic measurement and easy-to-read analysis reports through new software applications.
  • Speed: Lightning startup time. Multi-tasking operation to enhance productivity. Immediate reporting via wireless connectivity.


Enhancing productivity!
Managed by a highly efficient operating system, multiple functions can work simultaneously.
Now, users can perform OTDR measurements on a particular fiber core while simultaneously checking the power level and connector surface quality on others.


Dual-Operation Mode

Touch screen and hard-key buttons!
Tap, swipe, pinch, or press. Choose between the high resolution 8.4" multi-touch capacitive touchscreen or the robust hard-key buttons in any combination desired.
OTDR operations have never been easier!


Lightning Startup Time

Under 10 seconds!
Thanks to the latest high speed hardware and a highly efficient operating system, the AQ7280 starts up from completely OFF to measurement-ready in seconds.
It's always ready when you are!

Smart Mapper

Single button measurement. Comprehensive network characterization. Easy-to-read report.
Measurement acquisitions with multiple pulse widths and smart-algorithm enable users to detect and comprehensively characterize network events by pressing one single button.
Simple, icon-based map view for easy interpretation of network events. Immediate PASS/FAIL judgment based on user-defined thresholds.
Easily toggle trace view for manual supplementary analysis.
(/SMP option is required.)

Smart Mapper

Multi-Fiber Measurement

Database view. Organized. Quick preview of network characteristics.
OTDR-based application in a database view.
Guides users in tracking multi fibers measurements in sequence.
OTDR trace, power level and connector surface image of a particular fiber core are organized as one group.
With PASS/FAIL judgment, fiber core performance is easily characterized.

Multi-Fiber Measurement

Wireless Connectivity

Remote control. Remote data transfer.
Control the OTDR remotely using WindowsTM operating system devices via wireless router connection technology.
Transfer measurements results from the OTDR to WindowsTM operating system devices via FreshAirTM* technology.
Send the results/reports by email/file transfer software for immediate reporting.
* This feature may not be available due to the discontinuation of FlashAirTM.

Wireless Connectivity

Eagle Eye

Hunt down your breakpoint precisely and promptly.
Enabling the highest possible sampling resolution in a long distance measurement range, distance offset error is reduced.
With a relatively small distance offset error, users are able to pinpoint the actual break location in high distance accuracy.
Faster location identification, faster repair time.


15 Hours Battery Operation

Just keeps going!
Imagine working an entire work shift at your remote work site without worrying about running out of battery power. The AQ7280's powerful Li-Ion battery will last for an amazing 15 hours under the Telcoria standard conditions and 10 hours even with the laser continuously turned on!


Full range of selections.
12 OTDR units ranging from single mode to multi mode, from low dynamic range to ultra-high dynamic range, and 2 wavelengths to 4 wavelengths.
Selection of power sensor, light source, visible light source, and fiber inspection probe for instrument's customization based on users' needs.


Connector Quality Assurance

Zoomed in, checked out, all fixed up.
Using high-performance LightelTM fiber inspection probe, fiber connector surface is visualized for inspection of scratches and dirt.
Reduces 90% of fiber cable problems.

Fiber Surface Test Function (/FST option is required.)
The fiber surface testing function will perform pass/fail judgment according to the threshold of dirt and scratches by automatically analyzing the image data of fiber surface received via the fiber inspection probe.

  • Pass/fail judgment standard can be set to IEC61300-3-35 compliant or customized settings.
  • In order to receive fiber surface data, you will need a fiber inspection probe (DI-1000-B2/ DI-2000-B2 (Lightel)) which is compatible with the AQ7280 OTDR.

PDF Reporting

Using the AQ7280's Wireless Connectivity, the PDF reports can be transferred through the internet for immediate reporting.

  • Built-in post-proessing software for generating OTDR reports in PDF format
  • Flexible configuration of report template to meet users' report requirements

PDF Reporting

Intermittent Connection Monitoring

Under cold weather conditions, fiber network connectivity can be interrupted intermittently due to bending or losse connections.
Identifying such intermittent interruption requires periodic monitoring and advanced analysis algorithm.
The OTDR Schedule Measurement function is useful when monitoring a particular fiber core based on user-defined measurement period and interval.
Measurement results are compared with a reference trace and analyzed for any discrepancies. Based on the user-defined loss threshold, discrepency at a particular distance is identified and the occurance time is recorded.
(/MNT option is required.)

Intermittent Connection Monitoring

Macro Bending Detector

Thanks to the OTDR's advanced analysis function and macro bend characteristics, users can immediately identify and locate macro bend events along a fiber network. 
Multi-wavelength traces are acquired on the same fiber, then is compared and analyzed automatically in a single-button operation.
When the loss difference of a same location event at different wavelengths is more than the user's defined threshold, the macro bend is detected!

Macro Bending Detector

Fault Locator

The Fault Locator is an OTDR-based application for simply identifying the fiber break location.
Adaptive, smart-algorithm based on selected network architectures, such as point-to-point or PON network topology.
Simple view of distance information for easy interpretation.
Easily toggle trace view for additional detail analysis.

Fault Locator

PON Optimized

Excellent hardware performance and advanced analysis algorithm, enables the AQ7280* to accurately characterize Passive Optical Network (PON) through high-port-count splitters (up to 1 × 128).
PON mode assists beginner/expert users in simply configuring OTDR measurement settings based on PON topology information for optimal results. Short event dead zone and high sampling resolution enable users to detect near-end location of connectors that are as close as 0.5 meters (<20 inches).
With the built-in optical cut filter and dedicated measurement port, the AQ7283F module is capable to measure live PON for maintenance purpose.
*Available in selected AQ7280 modules.

PON Optimized

Multi-Language Support

A wide selection of diaplay languages assists users in operating the AQ7280 in their native language. Available languages influde, but not limited to: Chinese, Czech, Dutch, English, Finnish, French, German, Italian, Norwegian, Polish, Portuguese, Spanish, Swedish, and Turkish.

Multi-Language Support

Selection Guide

Unit guide
*1 Port2, Built-in filter
*2 Using an external filter


Supports 1383 nm for optical fiber cable inspection
1-port OTDR 1310/1383/1550/1625 nm
  • Supports the water-peak wavelength of 1383 nm where water ions (OH) in optical fibers absorb light.
  • Suitable for the inspection of optical fiber production and the cabling process of optical fibers.
  • Its portability allows the on-site testing of communications network lines when CWDM networks are introduced.


Traditional single-mode fibers (SMF) contain a large amount of water ions (OH). Since water ions (OH) absorb light at 1383 nm, the optical loss of single-mode fibers increases at 1383 nm, this characteristic is known as the water-peak. The AQ7283J was designed with the 1383 nm wavelength capability to specifically test the water-peak in SMF.

The loss-wavelength characteristics of single-mode fibers

The loss-wavelength characteristics of single-mode fibers

The effect of OTDR measurement at 1383 nm

The effect of OTDR measurement at 1383 nm

Quality inspection of low-OH optical fibers/cables
Low-OH single mode fibers*¹ are available for CWDM applications. They are tested at 1383 nm in each process of production.
Having four wavelengths in one port, the AQ7283J can measure at four wavelengths without switching the optical connector by just pressing one single button. It can be controlled remotely via a USB or Ethernet interface.*²
*¹: ITU-T G.657 standard
*²: AQ7280 option (/LAN)

Loss test of existing networks before introducing CWDM transmission system
When the introduction of the CWDM transmission system to existing optical fiber networks is considered, the optical loss of the network at 1383 nm needs to be measured because a traditional optical fiber may be used.
Thanks to its portable design, the AQ7283J OTDR unit can measure the loss at 1383 nm on-site where optical fibers are installed.


Equipped with “FILTERED” 1625 nm port for live-line maintenance
2-port OTDR 1310/1550 and 1625 nm
  • A built-in 1625 nm port with a cut filter to isolate from the communications wavelength enables the measurement of live-lines without being disturbed by active communications signals.
  • The wavelength accuracy of 1625 nm ±10 nm is guaranteed to enable maintenance of 10 GE-PON. Whereas other OTDRs with a broader wavelength tolerance could disturb the 10GE-PON transmission signals.
    Note: The AQ7283F is another three-wavelength model with 1310/1550 and filtered 1650 nm.


Measurement of live communications lines
The built in communications wavelength cut filter in a dedicated 1625 nm port enables testing of fiber where live communications traffic wavelengths (1310, 1490, 1550 nm) exist.

OTDR waveforms of live communications lines

OTDR waveforms of live communications lines

Macro bending measurement
The optical transmission loss of optical fibers at long wavelengths like 1625 nm increases at the point where the macro-bending occurs. By comparing OTDR waveforms measured in each wavelength, the macro bending can be detected.
*Other OTDR units with 1625 nm: AQ7283H, AQ7283K, etc.

OTDR waveforms with macro bending

OTDR waveforms with macro bending


Three-wavelength model for FTTH network testing
1-port OTDR 1310/1490/1550 nm
  • Successor model of the AQ7275 OTDR (735035)
  • Suitable for the installation check of FTTH networks that requires the measurement at 1490 nm.
  • More affordable price than the AQ7283K that is a four-wavelength model with 1310/1490/1550/1625 nm.

Additional Option License for AQ7280

This is a license product for adding applicable optional features on to AQ7280 series on your own.
It is necessary to update main unit firmware in advance to R1.07 or later and above in order to apply this license.  

Model Suffix codes Descriptions
735050 -MNT Monitoring function
-SMP Smart mapper
-FST Fiber Surface Test Function

Optical Power Meter & Checker


Measures and displays optical power of a light source as an absolute/relative value for testing transmitter/network performance. Measurement results can be saved for reference purposes.
Invaluable test instrument during installation and maintenance.
Calibrated and selectable wavelength setting. Single-mode and Multi-mode measurement ready. Continuous wave and modulated wave detection capability.
Two selections of optical power sensors are available- optical power meter and optical power checker, different on the specs and functions.

Optical Light Source


Outputs a stable, continuous wave of light for measuring end-to-end attenuation accurately when paired with Optical Power Sensor.
Modulated light function at 270 Hz/1 kHz/2 kHz is also available for fiber identification or continuity check purpose on a live fiber network.

Visible Light Source


Visible, continuous/modulated red light laser. Invaluable test instrument for checking the continuity of pathcords, launch fibers, or short fiber trunks. Breaks and bendings in fiber can be identified visually as the visible light exits the fiber on such fault events.






Multi-touch touchscreen

OTDR, OLS port

Hard-key buttons

USB 2.0 mini port

OPM, VLS module

USB 2.0 port

OTDR unit

Ethernet port

Battery (inside)

VLS port

SD card slot (inside)

OPM port

DC power input

LCA Reduced energy, emission of CO2, NOX and SOX about 18% to 33% compared to the previous model.

PDFResults of Life Cycle Assessment

739860 Soft Carrying Case

Soft Carrying Case

739883 Battery Pack

for DL350, AQ7280 and MT300

B8070CY Shoulder Belt

Shoulder Belt

739874 AC adapter

Suffix codes Descriptions
-D UL/CSA Standard
-F VDE Standard
-H Chinese Standard
-N Brazilian Standard
-P Korean Standard
-Q BS/Singaporean Standard
-R Australian Standard
-T Taiwanese Standard
-A Argentine Standard

Looking for more information on our people, technology and solutions?

Contact Us