OTC2400 OTDR Module

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In recent years, with the rapid development of optical communication technology, optical cable monitoring systems have been widely used in many fields such as optical communication network maintenance and fiber optic sensing. In particular, with the large-scale promotion and application of Dense Wavelength Division Multiplexing (DWDM) systems, the Optical Time Domain Reflectometer (OTDR) module has shone brightly. It plays an indispensable key role in real-time optical cable monitoring, precise fault location, and in-depth performance analysis of fiber optic links, with increasingly extensive application scenarios. Among them, the OTC2400 OTDR module is unique. It adopts the advanced CFP2 packaging process and ingeniously integrates 4 optical switches internally. Not only is its structural design compact and sturdy, but it also combines excellent cost-performance and high-performance advantages. It has created a convenient and practical card-type OTDR solution tailored for optical cable monitoring operations and DWDM systems, greatly meeting the current industry's needs.

Module Highlights

Compact Built-in Optical Switches

The module, packaged in CFP2 format and supporting hot-swapping, integrates four optical switches. With dimensions of only 136.8×41.5×13.6 mm, it is ideal for optical cable monitoring systems with stringent space and size requirements.

High Performance Metrics

The OTDR module boasts a dynamic range of up to 40 dB, with an event dead zone of 1 meter and an attenuation dead zone of 5 meters. It also features a sampling interval of 12.5 cm and up to 256,000 sampling points to ensure high-precision testing of fiber optic links.

Fast Response

Equipped with a real-time testing mode, the module can update OTDR test results at a high speed of 300 ms, enabling rapid display of results.

High Transmission Rate

The OTC2400 module can complete high-precision testing of fiber optic links within 5 seconds. It supports rapid downloading of card-based OTDR test configurations and quick uploading of test results, making optical cable monitoring more efficient.

Communication Method

The module uses SPI communication, where data interaction between the module and the board software is completed via SPI. During SPI communication, the board operates in master mode while the module operates in slave mode.

OTC2400 Module Diagram

Technical Specifications
Model	OTC2400
Dynamic Range	32-40 dB (typical value, pulse width 20μs, (SNR=1) at 25℃)
Wavelength	1502±0.5 nm
Test Fiber	10μm/125μm single-mode fiber (ITU-T G.652)
Pulse Widths	3, 5, 10, 30, 50, 100, 275, 500, 1000, 5000, 10000, 20000 ns
Test Range	0.5, 2.5, 5, 15, 40, 80, 120, 160, 200, 240 km
Event Dead Zone	≤1 m	Attenuation Dead Zone	≤5 m
Sampling Interval	0.125 to 2 m	Sampling Points	256000
Reflectivity Setting Range	1.30000 to 1.80000	Linearity	±0.05 dB/dB
Test Distance Uncertainty	±(1+0.005%×distance+sample resolution)	Return Loss Test Accuracy	±2 dB
Automatic Testing	Test items: total loss, distance of each event point, loss, return loss or reflectivity

Manual Testing	Test items: transmission distance, binary search, link loss, reflectivity
Optical Switch Specifications	Isolation	≥60 dB
	Repeatability	≤±0.05 dB
	Insertion Loss	≤1 dB (typical value 0.8 dB)
	Return Loss	≥45 dB
	Switching Time	≤10 ms
	Switching Life	≥10^7 cycles
	Number of Optical Ports	4
Laser Safety	IEC 60825-1:2007: CLASS 121 CFR 1040.10
Power Supply	DC+5±0.1V/IA, DC+3.3±0.1V
Interface	SPI electrical interface
Dimensions and Weight	136.8×41.5×13.6 mm, less than 0.5 kg
Environmental Conditions	Operating Temperature and Humidity: -5℃ to +55℃, ≤95% (non-condensing) Storage Temperature: -40℃ to +70℃
EMC	EN 61326-1, EN 61000-3-2

Ordering Information

Ordering Model

OTC2400X-X

1, X: Dynamic Range Selection 2, X: OTDR Test Wavelength Selection

M: Dynamic range 40-43 dB S: 1502 nm wavelength OTDR

H: Dynamic range 38-40 dB

N: Dynamic range 35-38 dB

L: Dynamic range 32-35 dB

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