YOKOGAWA AQ7290 Series Optical Time Domain Reflectometer OTDR

YOKOGAWA AQ7290 Series Optical Time Domain Reflectometer OTDR

Product basic information

1. Product positioning and core applications

The AQ7290 series OTDR is a professional equipment used for fiber link detection. Its core function is to analyze the transmission loss, joint loss, fault location (such as breakage, bending) and other parameters of the fiber by emitting optical pulses and receiving reflected light. It is mainly used for:

Access network: Fiber optic installation and maintenance between telecommunications operators and users (mainly single-mode fiber optic).

Enterprise network: Fiber optic detection of internal communication networks within enterprises or buildings.

Long distance network: troubleshooting and performance monitoring of backbone fiber optic links between telecommunications operators.

2. Manual system and version information

Supporting documents: including Chinese specific documents (IM 739883-92Z1), European language safety manual (IM 00C01C01-01Z1), global contact list (PIM 113-01Z2), and communication interface manual (IM AQ7290-17EN) stored in device memory, which needs to be downloaded to PC for viewing.

Language code: In the manual number, "EN" represents English, "Z1" represents Chinese and other languages. Users can access it through the Yokogawa Customer Portal（ https://myportal.yokogawa.com/ ）Obtain the corresponding version.

Version iteration: The current version is the first edition in April 2025, and the content may change without prior notice due to product feature upgrades. The latest version should refer to the official website.

Trademark Statement: Mentioning brand trademarks such as Microsoft, Apple, Google, etc., omitted in the manual ®  The TM symbol and other brand names belong to their respective holders.

Core functions and operating procedures

1. Basic measurement function (OTDR core)

(1) Optical pulse measurement mode

Support two core measurement modes to meet different scenario requirements:

Measurement mode, functional characteristics, applicable scenarios

Average measurement (TRACE/MAP mode): Take the average of multiple measurements to reduce noise interference; Automatically analyze events after measurement, and switch between "TRACE" or "MAP" to accurately detect weak events (such as low loss connectors) and generate formal detection reports

Real time measurement (only available in TRACE mode) updates waveforms in real-time, supports dynamic adjustment of parameters such as wavelength and distance range, real-time monitoring during fiber installation, and quick troubleshooting of obvious faults

(2) Key measurement parameter settings

Wavelength: Different models support 1310nm, 1550nm, 1625nm, 1650nm, etc. For example, AQ7293F supports 1310/1550/1650nm, and AQ7293H supports 1310/1550/1625nm.

Distance range: Supports AUTO (automatic matching of fiber length) and manual setting of 100m-512km. It is necessary to select a range greater than the actual length of the fiber to ensure complete measurement.

Pulse width: Short pulses (3ns-30ns) are suitable for close range high-resolution measurement, while long pulses (1 μ s-20 μ s) are suitable for long-distance measurement, and can be manually set or automatically matched with a distance range.

Average frequency/duration: The average frequency supports 2 ¹⁰ -2 ² ⁰ times, with a duration of 5-30 minutes. The larger the frequency/duration, the higher the measurement accuracy but the longer the time consumption.

(3) Event analysis function

Automatically detect "events" (such as joints, fractures, bends) in fiber optic links and calculate key parameters:

Event types: including joint loss, reflection loss, bending loss, splitter loss, fiber optic endpoint (Fresnel reflection), etc., visually displayed in MAP mode through icons (such as "⊡" for joints and "■" for endpoints).

Analysis parameters: The joint loss threshold (0.01-9.99dB), reflection loss threshold (20-70dB), and fiber endpoint threshold (3-65dB) can be set. Events exceeding the threshold will be marked as "fault".

Manual adjustment: supports inserting/deleting events, editing event marker positions, and solving noise misjudgment or weak event missed detection problems.

2. Utility function

The device supports parallel use of multiple tools and can synchronously perform other detections during OTDR measurement, improving work efficiency:

Key parameters/options for the core purpose of tool functionality

Light Source fiber loss measurement, fiber identification output wavelength consistent with OTDR (such as 1310/1550nm), supports continuous light (CW) or modulated light (270Hz/1kHz/2kHz)

Visible light source (/VLS option) visually locates fiber breakpoints, checks multi-core fiber core sequence, fixed wavelength 650nm, supports CW or 2Hz modulation light

Optical power meter (/SPM//HPM option) measures optical signal power, fiber loss/SPM (standard): 800-1700nm,/HPM (high power): maximum+27dBm, supports logging (CSV format)

Power checker (/PC option) detects the presence of communication light in the fiber (to avoid interference) and measures wavelengths of 1310/1490/1550/1625/1650nm