Toner OTD-1315A User manual

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OTD-1315A
Optical Time Domain Reflectometer
User’s Manual

www.tonercable.com
OTD-1315A
Optical Time Domain Reflectomer
Instruction Manual
Preface
Thank you for your purchasing and using OTD-1315A series handheld optical time domain
reflectometers. This Manual mainly covers the common operation and maintenance of the instrument
and the solutions of common faults. For your convenience, before operating this instrument, please
carefully read this Manual and correctly operate it according to the instructions in this Manual.
All trademarks and names covered in this Manual are in the possession of our company, which are
used only for this instrument. Any entity or individual shall not alter, reproduce and disseminate the
contents in this Manual for any commercial purchases without the authorization.
Contents in this Manual are subject to change without notice. If you have any question, please call the
instrument supplier, and we will provide you with the best quality services!

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Chapter 1 General
1. Unpacking Inspection
Before you receive this instrument, please carefully check the product appearance and quality
according to the packing list to find the possible damage caused in the transport process. If the
package is found damage, please keep the original packing materials, give an immediate notice
to the freight company and contact the supplier to solve this problem.
The product package should be provided with the power cord, adapter, analysis software
installation CD, user manual, etc together with the instrument, for detail, see the packing list. If
the materials in the packing box are discovered incomplete, please contact your supplier agent to
solve them in a timely manner.

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OTD-1315A
Optical Time Domain Reflectomer
Instruction Manual
Table 1-1 Basic components of OTD-1315A series Optical Time Domain Reflectometer
ITEM
NAME
QUANTITY
Host machine
OTD-1315A Optical Time Domain
Reflectometer
1
Standard
accessories
Power cord
1
Power adapter
1
User manual
1
CD (containing OTD-1315A simulation analysis
software)
1
Engineering plastics packing box
1

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OTD-1315A
Optical Time Domain Reflectomer
Instruction Manual
2. Overview of Instrument
OTD-1315A series handheld optical time domain reflectometer (OTDR) is a new generation of
intelligent optical measuring instrument designed for the optical fiber communication system
test. This product is mainly used to measure the parameters of optical fibers and cables, such as
length, loss, and connection quality, etc.; it can realize the accurate positioning of event points
and fault points, and can be widely used in the construction, maintenance testing and emergency
repair of the optical fiber communication systems as well as the research, production and
production measurement of optical fibers and cables and so on. This product can provide you
with the highest performance of solutions for installation and construction of fiber optic network
construction and the subsequent fast and efficient maintenance and troubleshooting testing.
OTD-1315A has novel appearance, durable; it has the simplest interface and intuitive operation
in the OTDR industry; among the same type of handheld products, its unique dual operation

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OTD-1315A
Optical Time Domain Reflectomer
Instruction Manual
mode of key plus touch screen can greatly simplify the user’s application; with one-key analysis,
it can quickly obtain the test results. The events are displayed in the main interface in a way of
list, and such information includes event number, type, event location (distance), loss, reflection,
event point attenuation, total loss, etc..; the whole machine adopts the intelligent power
management mode; the high capacity of lithium battery can make the whole machine working
for more than 10 hours, so it is very suitable for outdoor environments for a long time.
3. Notices
External power supply
Power adapter input meets the following requirements: 100V ~ 240V, 50/60Hz; @ 1.8A.
Power adapter output meets the following requirements: 19V ± 1V, 3.42A Polarity: center
positive.

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OTD-1315A
Optical Time Domain Reflectomer
Instruction Manual
Please use the external power supply in strict accordance with the specification;
otherwise it may cause damage to the device.
Internal battery
Inside the instrument is the OTD-1315A Series OTDR dedicated lithium battery. To give full
play to the performance of the battery, please charge the instrument with the internal battery
and use up the electric quantity before using this instrument, and then charge the battery. The
first time of charging should be no less than 10 hours. The charging temperature range of the
battery inside the machine is 0℃～50℃. When the ambient temperature is too high,
charging will be automatically terminated for your safe use. When the instrument is not in
service for more than 2 months, timely charge it to maintain the electric quantity of the
battery; do not take out the battery without permission; do not keep the battery close to the
fire source and intense heat; do not open or damage the battery; the battery must be taken out

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OTD-1315A
Optical Time Domain Reflectomer
Instruction Manual
when the instrument is stored for a long time. The temperature range for long term storage of
battery is -20℃～45℃.
Laser safety
When using this instrument, avoid eyes to look at the laser output port directly, nor look at
the end of the optical fiber when testing; when the instrument is not in operation, please
cover the dust cover of the optical output port.
When the visible red light of the instrument is on, please do not look at the output port of the
red light directly, nor look at the end of the optical fiber at the output end of red light
directly.
Instrument maintenance
1. The warranty period of the whole machine is 18 months and that of the battery is 6

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OTD-1315A
Optical Time Domain Reflectomer
Instruction Manual
months. The items accompanied with the product are not within the warranty scope.
2. The light output connector of the instrument is quick-wear part, which is not within
the warranty scope.
3. If the instrument is damaged or in performance reduction caused by irresistible
external factors, they will not be within the warranty scope.
4. If the instrument is damaged or in performance reduction caused by improper
operation, they will not be within the warranty scope.
5. Users are forbidden to dismantle this instrument without the permission of the
company or designated authorized entity; otherwise, it will lose the
qualification of warranty permanently!
Return of Instrument
If the product needs to be returned due to product calibration or other reasons, please

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OTD-1315A
Optical Time Domain Reflectomer
Instruction Manual
contact your supplier in advance and briefly explain the reasons for product return, so as
to provide effective and timely services for you.
When returning your product, please notice that:
Pack the instrument with polyethylene and other soft thin cushion to protect the
completeness of the instrument shell;
Please use the original hard packing box. If other package is used, ensure that there is
at least 3 mm thick of soft object around the instrument;
Fill out the warranty card correctly, including the company name, address, contact
person, contact phone, problem description, etc.;
Deliver the products to the supplier’s agent in a reliable way.

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Chapter 2 Basic Operation of OTD-1315A OTDR
1. Introduction
OTDR is a precise optical measuring instrument made according to the backscatter principle of
Rayleigh scattering and Fresnel reflection when the transmission of laser in the optical fiber. It
can be widely used in the installation and construction, maintenance and repair and monitoring
application of optical fiber and fiber cables. It can be used to measure the length, attenuation,
connection quality and fault location of optical fibers and cables, etc.
When transmission of light in the optical fiber, the optical pulses in the optical fiber transmission
will generate Rayleigh scattering due to the defects of optical fiber and non-uniformity of the
mixed components. Of which, a part of light signal will be scattered back along the direction
opposite to the incident pulse, therefore, it is called backward Rayleigh scattering. Through

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OTD-1315A
Optical Time Domain Reflectomer
Instruction Manual
observing the intensity changes of backward Rayleigh scattering light signal, the loss
distribution, connection quality and other features of optical fibers and cables can be accurately
measured. Besides, according to the theory of optical transmission, when the light encounters the
boundary of the two transmission media of different refractive indices in the transmission
process (for example, connectors, mechanical connection, fracture or optical fiber termination
points), Fresnel reflection phenomenon may occur. Through receiving the Fresnel reflection
signal on regular basis, the position of the discontinuity points along the length of the optical
fiber can be accurately determined. The size of reflection depends on the refractive index
difference and boundary surface flatness.
2. Description of the OTDR test event type
OTDR test event refers to the abnormal points that may cause loss or a sudden change in the
reflected power, including various types of connection and bending, cracks or fracture in the

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OTD-1315A
Optical Time Domain Reflectomer
Instruction Manual
fiber link, which may cause the transmission signal loss.
The OTDR test events are mainly divided into two types: reflection events and non-reflective
events.
2.1 Reflective event
When the laser pulse emitted from OTDR is transmitted along the measured optical fiber, which
encounters a mechanical connection point or the end of the optical fiber, reflection phenomenon
will occur due to the change of the refractive index, and some of the light energy will return
along the optical fiber to the instrument. Through receiving this reflected signal, the instrument
will detect this reflection event, which will be presented as upward spike signal of a certain
width in the curve. The width of the spike is mainly determined by the width of the tested pulse,
as shown in Fig. 2-1.

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OTD-1315A
Optical Time Domain Reflectomer
Instruction Manual
Fig. 2-1 Reflective event chart
2.2 Non-reflective events
When the laser pulse emitted from OTDR is transmitted along the measured optical fiber, which
encounters a welding point, bending that may causes loss of some energy, there is no great

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OTD-1315A
Optical Time Domain Reflectomer
Instruction Manual
change to the refractive index, therefore, the reflection phenomena do not occur or can be
negligible. OTDR detection can detect the non-reflective event parameters of this point through
the energy change difference of backscattering to the OTDR receiving end. The non-reflective
events can produce a light energy drop signal in the curve and its drop amplitude represents the
power attenuation condition, as shown in Fig. 2-2.
Fig. 2-2 Chart of non-reflective event

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OTD-1315A
Optical Time Domain Reflectomer
Instruction Manual
3. Description of OTD-1315 series OTDR interface
3.1 Optical connection ports of OTD-1315 OTDR
The optical connection ports of OTD-1315 OTDR can be divided into OTDR output interface
and visible red light output port, which both adopt FC/PC optical connector (can be changed to
SC/PC and ST/P).

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OTD-1315A
Optical Time Domain Reflectomer
Instruction Manual
Fig. 2-3 Schematic diagram of OTD-1315A optical interface
When using OTDR or visible red light, do not directly look at the corresponding
light output interface.

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OTD-1315A
Optical Time Domain Reflectomer
Instruction Manual
3.2 OTD-1315A OTDR Power Supply Interface
OTD-1315A Series OTDR power port is on the right side of the instrument.
Input requirement: 19V±1V，≥2 A, Polarity: positive in the center.
Fig. 2-4 Schematic diagram of OTD-1315A power port
Please use the adapter provided by the manufacturer to charging this instrument,
otherwise, it may cause damage to the instrument.

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OTD-1315A
Optical Time Domain Reflectomer
Instruction Manual
3.3 Data Interface
This instrument is equipped with USB interface, which is located on the left side of instrument.
Trough this interface, the test trace stored in the instrument can be uploaded to the computer
through this interface, and carry out follow-up analysis and processing with the PC machine data
analysis software, print and produce report forms, etc.
Fig. 2-5 Schematic diagram of OTD-1315A data interface

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OTD-1315A
Optical Time Domain Reflectomer
Instruction Manual
4. Operation interface and button of OTD-1315A Series OTDR
The operation interface of OT-1315A Series OTDR is very simple, which is mainly divided into
operation window area and menu display area. When the instrument is started to enter the
application interface, the interface appearing on the display screen is the main operating window,
as shown in Fig. 2-6. The main operating window includes all six main operating menu bars of
OTDR and each menu bar contains different sub-windows. Through these operation buttons,
start the different sub-windows to realize the corresponding functions. (Details see the operation
method).