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.

40+ 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.

Modular OTDR

The AQ7280 OTDR offers first-class performance thanks to updated functions, a large capacity battery, and a large user-friendly screen.
Additional benefits that ensure measurement quality and improve work efficiency include:

Full range of selections

  • Up to 14 OTDR units to choose from
  • Customizable with five optional modules
  • 90 potential combinations*1

Proven reliability

  • High SNR mode ensures high trace quality.
  • Maximum 15 hours battery operation

Quick and easy to use

  • 8.4-inch high luminance color LCD
  • Smartphone-like usability


  • Multi-fiber measurement up to 2000 fibers
  • Auto-execute multiple measurements and analyses with Smart Mapper

Much more than an OTDR

  • A variety of optional features for multi-tasking
  • Application software that facilitates analysis

*1 This includes combinations with the cover bracket instead of OPM (Optical Power Meter)/VLS (Visible Light Source) modules.


Touch panel application menu

The 8.4-inch touchscreen enables intuitive operation. Select the desired function by simply tapping the icon on the main menu.

Touch panel application menu


No special tools needed

The hardware for the OTDR units, option modules, and battery cover can be removed and put back using common work tools, even coins, to allow for quick and easy replacements and tweaks even when in the field.

No special tools needed


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.
13 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

AQ3550 Optical Switch Box

The AQ3550 12-ch optical switch box for SMF works in conjunction with an OTDR.
Control and power supply are performed from the OTDR main frame, while the optical switch box enables continuous measurement of all or a selection of the 12 channels.
It is useful when measuring multiple fibers, such as optical fiber tape, under the same conditions.
*AQ3550 is not available with AQ7282M

AQ3550 Optical Switch Box

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

For fiber optic installation

For fiber optic installation

For optical fiber research and manufacturing

For optical fiber research and manufacturing

*1 The dB value is the maximum dynamic range of OTDRs for each target area
*2 A built-in cut filter to isolate from communication wavelengths included

AQ7282A, AQ7283A, AQ7284A, AQ7285A

Two-wavelength module with 1310/1550 nm wavelengths that are most used in fiber optic installation

The AQ7282A is ideal for measurement of less than 70 km networks, while the AQ7283A is the best choice for networks longer than 70 km with splitters.
The AQ7284A and AQ7285A are high dynamic range models designed for measurement of networks longer than 100 km.

Trace examples with pulse width of 1 μs

Trace examples with pulse width of 1 μs


AQ7283E, AQ7283F

Maintenance models for live communications lines

These OTDRs have a port for a maintenance wavelengths of 1625 nm or 1650 nm, which does not affect communication wavelengths, and a built-in cut filter to prevent interference with live communications traffic wavelengths.
The AQ7283E guarantees wavelength accuracy of 1625 nm±10 nm to enable maintenance of 10GE-PON, and the AQ7283F guarantees a maximum output power of +15 dBm or less and allows maintenance measurements on paths where output power is limited.

Trace examples of live communications lines

Trace examples of live communications lines


AQ7283H, AQ7284H, AQ7282G, AQ7283K

A port three wavelength / A port four wavelength models

These OTDRs measures at more than three wavelengths without switching optical connector. The AQ7283H and AQ7284H detect macro-bending where the loss is larger at longer wavelengths and are useful for testing CWDM transmission paths using a wavelength of 1260-1625 nm.
The AQ7282G and AQ7283K are suitable for installation checks of FTTH networks that requires measurements at 1490 nm.

Trace examples with macro bending

Trace examples with macro bending


AQ7286A, AQ7286H, AQ7286J

For optical fiber research and manufacturing

These models guarantee a center wavelength of ±15 nm at all wavelengths, which meets the stringent light source requirements for optical fiber and cable manufacturing. Optionally, a center wavelength of ±10 nm (compliant with IEC 60793-1-40) can be specified. In addition, this model guarantees measurement accuracy and reproducibility for research and manufacturing applications and enables stable inspection measurements.

AQ7286A, AQ7286H, AQ7286J


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 LCD touchscreen


Ethernet port*


Hard-key buttons


VLS port(VLS module)*


OPM/VLS module


OPM port(OPM module)*


Battery Pack(inside)


SD card slot(inside)


OTDR unit


DC power input


OTDR/stabilized light source*/power checker* port


OTDR unit with an air cooling fan


USB type-B port(Mini-B)


USB type-A ports



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

PDFResults of Life Cycle Assessment

It has been confirmed that AQ7280 runs with the following commercially optical fiber inspection probe. For the details of each products, please visit the website of each manufacturer.
Please note that Yokogawa do not guarantee the all operation of the contents posted on each manufacturer's website.

Fiber inspection probe

Manufacturer Product name / model number Function Supported Products
Fiber surface image display
(standard feature)
Fiber surface test function
AQ7280 AQ1210 AQ1000
Lightel DI-2000
Lightel Dl-1000MPO+
For single-core and MPO connector

Only single-core
Lightel DI-1000
Lightel CI-1100 (discontinued)
Eternal FVO-730B-P

739860 Soft Carrying Case

Soft Carrying Case

B8070CY Shoulder Belt

Shoulder Belt

AQ3550 Optical Switch Box

A 12-channel optical switch box that effectively improves workability with YOKOGAWA OTDRs.
Controlled from an OTDR, the OSW allows continuous measurement of all or a subset of the 12 channels.
The compact size makes this an ideal solution to conveniently measure multiple ribbon fibers in the field or conserve production test rack space.

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

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