Optical Time Domain Reflectometer

This Guide is the first edition of the AV6418 Optical Time Domain Reflectometer. The
version number is AV2.761.0056SS.
The information contained in this Guide is subject to change without notice.
The explanation right of all the contents and terms in this Guide belongs to the 41 st
Institute of CETC.
The 41 st Institute of CETC makes no warranty of any kind to this Guide, including but not
limited to the implied warranties of merchantibility and adaptability for a particular
purpose. The 41st Institute of CETC shall not be liable for errors contained herein or for
incidental or consequential damages due to the practibility of this material or version.
The copyright of the Guide belongs to the 41 st Institute of CETC. Other entities and
inpiduals can’t change or juggle it without our permission, and don’t copy, and spread
(including electronic filling, retrieval or translating it into another language) for business
benefits. If discovered, we have the right for legal action.

The following general safety precautions must be taken during all the phases of operation of
this instrument. Failure to comply with these precautions or with the warnings and precautions
specified elsewhere in this Guide will violate the safety standards of design, manufacture and
intended use of the instrument. The 41 st Institute of CETC assumes no liability for the
customer’s failure to comply with these requirements.
ENVIRONMENTAL CONDITIONS
Refer to the “Chapter 10 Technical Parameters” for the operating and storage environment of
the instrument
POWER SUPPLY
Refer to “Chapter 10 Technical Parameters” for the requirements for working power supply of
the instrument. Before power-on, please make sure the instrument has been set to match
available supply voltage and all safety precautions have been taken.
DON’T  OPERATE  IN  AN  INFLAMMABLE  AND  EXPLOSIVE
ATMOSPHERE
Do not operate the instrument in the presence of flammable gases or fumes.
DON’T REMOVE ANY PART OF THE INSTRUMENT WITHOUT
APPROVAL
Please don’t remove any part of the instrument without approval, other than as explained in this
Guide. Component replacement and internal adjustments must be made only by the 41 st
Institute of CETC or its authorized service personnel.

Warnings for Use of Instrument
External DC Power Supply
External DC power supply must meet the following requirements: 17V~21V, >2.5A, polarity:
positive core. Use of overhigh voltage may damage the instrument.
Internal Battery
(1) The battery inside the instrument is special lithium battery. Use of other batteries may
damage the instrument and endanger the personal safety of users.
(2) For safety, don’t disassemble battery pack to avoid short circuit; even don’t fiercely impact
or put the battery into or close to fire and strong heat to avoid explosion.
Laser Safety
(1) The safety class of the laser of this instrument is: CLASS1 LASER PRODUCT: 21 CFR
1040.10 or CLASS 3A LASER PRODUCT: IEC 60825-1:Ed.2:2001.
(2) Although up to safety standards, the output intensity of the laser of the instrument still may
damage eyesight, so it shall be prevented from directly shooting at eyes. Please don’t directly
look into the optical output connector of OTDR with eyes, or even the optical fiber tail during
testing. When the VFL function of the instrument is activated, please don’t directly look into the
output port of VFL optical source, or even the optical fiber tail at VFL port.
Use of OTDR
Never connect an optical fiber carrying any kind of optical signal to the test port of AV6418
OTDR. Otherwise, it could result in inaccurate measurement result and even permanent
damage to the instrument. Please make sure that all the optical fibers under test are inactive.

(1) Please pack this instrument in original packing material when shipping to avoid serious
impact and vibration.
(2) Before using this instrument, please carefully check and make sure the instrument model is
AV6418 Optical Time Domain Reflectometer, the instrument has not evident damage on the
surface and all accessories are complete.
(3) Store the instrument under the ambient temperature range of -20℃~60℃ (please see
“Internal Battery” for detailed storage temperature range of battery) in a dry and ventilating
place without direct sunshine. When the instrument will be stored for a long time, please
remove the battery and perform regular check with poweron, and meanwhile, make
charge-discharge cycle once every 3 months.
(4) In order to prolong battery life, make charge-discharge cycle once every 3 months for
long-time storage, for which, please discharge the battery completely first and then recharge it.

Calibration Requirements
Validity of technical parameters depends on environmental conditions. Calibration validity
period can be longer or shorter depending on the intensity, environmental conditions and
instrument maintenance. You should determine an appropriate calibration validity period
according to your needs.
Under normal use, we recommend to calibrate AV6418 Optical Time Domain Reflectometer
once every year. Please dial service telephone for details.​

1.    Overview of Instrument

 Optical Time Domain Reflectometer (hereinafter referred to as  OTDR) is a kind of multifunctional test instrument with high performance designed for FTTx network. This product is mainly used to measure the length, transmission loss, splice loss, etc. optical fiber’s physical characteristics of optical fibers and cables, and also can exactly locate the event and fault in fiber circuits. It is widely used for the engineering construction, maintenance test & emergency repair of optical fiber communication system and research & development and production test, etc. of optical fibers and cables.

The appearance of  OTDR adopts the most advanced integrative double-color double-material mould design technology in the industry, novel and beautiful, solid and durable, and also adopts the duplex operation mode of touchscreen and key-press, simple and convenient, easy-to-learn and easy-to-use; there is advanced antireflection LCD display unit inside and the operating interface is also visible even outdoor; the whole instrument has 4 optical ports to realize the optical power meter, VFL and single mode & multimode testing functions, the types of which can be changed at random in convenience for cleaning of optical fiber end face. This product has abundant external ports to externally connect with USB disk & printer and realize data communication with PC by two different USB ports. Test results can be stored in the instrument and also can be stored in SD card by SD port. There is lithium battery with large capacity inside the instrument so the instrument can work for more than 8 hours, suitable for long-time outdoor work.

Besides the functions of OTDR,  OTDR also can have the optional functions of optical power meter, optical source, visible fault locator (VFL) and audio detection, etc.

n  0.8m extra-short event dead zone, easy to test optical fiber jumper;

n  45dB high dynamic range, 128k data sampling points;

n  Most advanced integrative double-color double-material mould technology in the industry, solid and durable;

n  Advanced antireflection LCD, visible display interface even outdoor;

n  Many test modes, touchscreen and shortcut operation;

n  Communication light auto monitoring function;

n  Double USB ports for connection of external USB disk & printer and communication with PC via Sync Active software;

n  Support Bellcore GR196 and SR-4731 file formats;

n  WinCE windows operating system, an operating interface with many languages;

n  Built-in optional visual fault locator (VFL), optical power meter, optical source, audio detection, etc. functions;

n  The type of optical output connector of OTDR can be replaced randomly, end face is clean and convenient;

n  Update of application software system, unnecessary to return it to original factory.

Table 1-1 Basic Composition of  OTDR

Optional Accessories

The options of  OTDR are shown in Table 1-3.

Table 1-3 Options of  OTDR

(2) The bold font in this Guide indicates emphatic prompt.

(3) The bold font with 【】 in this Guide indicates the button in operating interface.