Baudcom BD3000 User manual

SHANGHAI BAUDCOM COMMUNICATION DEVICE CO.,LTD
BD3000 Optical Time Domain Reflectometer
USER’S GUIDE

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PREFCE
Thank you for purchasing and using this series of handheld optical time domain
reflectometer. This manual contains information about the operation and maintenance of the
instrument, as well as common troubleshooting guidelines. In order to facilitate your use, please
read this manual carefully before operating this instrument and follow the instructions in the
book.
This document is restricted to the use of this instrument. No unit or individual may, without
the authorization of the company, tamper with, copy and distribute the contents of this manual
for commercial purposes.
The contents of this document are subject to change without notice. If you have any
questions, please call the supplier, we will be happy to provide you with the best quality service!

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MENU
PREFACE∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙2
Chapter 1 Summary∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙6
1.1 Instrument Unpacking Inspection ∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙7
1.2 Summary ∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙8
1.3 Attentions ∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙10
Chapter 2 OTDR Introduction∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙15
2.1 OTDR Basic Knowledge Introduction∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙15
2.2 OTDR Test Event Type Introduction∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙17
2.3 OTDR Dynamic Range∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙22
2.4 OTDR Dead Zone ∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙22
Chapter 3 The Basic Operation and Usage of this Series OTDR ∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙24
3.1 Main Operating Window ∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙25

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3.2 The Menu Structure and Function of OTDR ∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙27
3.3 Key Function Introduction of OTDR ∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙28
3.4 The Setting Method of The Parameters of the OTDR ∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙31
3.5 Parameter Introduction and Setting Method ∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙33
3.6 Introduction of Loss Test ∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙41
3.7 CurveAnalysis and Event List ∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙46
3.8 Move or Switch Cursor∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙49
3.9 Zoom or Move the Curve ∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙50
3.10 Manual Measurement of Average Loss Between Two Points in an Optical Fiber
Link∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙51
3.11 Manual Measurement of the Loss of Connection Points and Fusion Contacts in Optical
Fiber Links∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙52
3.12 Measure Echo Loss Manually ∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙54

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3.13 File Management Class ∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙56
Chapter 4 Basic Operation and Use Method of Optical Power Meter∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙65
Chapter 5 Introduce of The Function of Face Detection ∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙69
Chapter 6 Visual Fault Location（VFL）∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙70
Chapter 7 Instrument Maintenance and Troubleshooting∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙72
7.1 Daily Use and Maintenance of Instrument ∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙72
7.2 Fault and Treatment Method∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙75
Chapter 8 Technical Parameters and Ordering Information∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙80
8.1 Technical Parameters of OTDR ∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙80
8.2 Order Information ∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙87

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Chapter 1 Summary
1.1 Instrument Unpacking Inspection
The packaging and transportation of this instrument are strictly in accordance with the
general technical conditions of GB/T 9174-2008 "general cargo transport packaging". When you
receive this instrument, please check the product according to the packing list and check the
quality of the product. If you find the packaging damage, please keep the original packaging
materials at the same time, immediately notify the shipping company, and contact with the
supplier of this product.
In the product packaging, along with the instrument, should also be equipped with a power
cord, adapter, analysis software and user manuals, etc.. After you receive the instrument, please
check the integrity of the packaging of the equipment for the first time. If you find that the

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material in the packing box is not complete, please contact with the supplier.
Form 1-1 Basic Composition of OTDR
ITEM
NAME
QUANTITY
MASTER
BD3000 OTDR
1
Accessory
Options
Power Cord
1
Power Adapter
1
User’s Guide
1
U Disk（Including simulation
analysis software）
1
Touch Pen
1
Soft Bag and Strap
1
Certificate
1

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1.2 Summary
The BD3000 series of optical time domain reflectometer (OTDR) is a new generation of
intelligent optical fiber measuring instrument designed for the testing of optical fiber
communication system. This product is mainly used to measure various types of optical fiber,
optical cable length, loss, and other parameters of the quality of the connection; can quickly in
the optical fiber link in the event points, fault location. It can be widely used in the construction,
maintenance and emergency repair of optical fiber communication system. In the construction of
fiber optic network installation, or follow-up rapid and efficient maintenance and
troubleshooting test, this product can provide you with the highest performance solutions.
The appearance of this novel instrument; OTDR has the industry's most simple interface,
intuitive operation; in similar products, buttons and touch screen dual mode of operation, greatly
simplifies the user; analysis of a type unique, quick access to the test result, the event is
displayed in a tabular form on the main interface, the relevant information including: event type,

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event location, loss, reflection, attenuation, event between total loss; machine adopts intelligent
power management mode, large capacity lithium battery makes the machine work more than 10
hours, very suitable for the long-term field environment.
In addition to the OTDR function, the instrument can also be equipped with optical power
meter, light source, visual fault location (VFL) and the end detection function.
Figure 1-1 BD3000 Main Menu

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1.3 Attentions
1.3.1 External Power Supply
Power adapter input meets the following requirements:100V～240V, 50/60Hz；@1.8A。
Power adapter output meets the following requirements:12V±1V, 2A, Polarity: Center is
positive.
Please use the external power in strict accordance with the specification, otherwise it
may cause damage to the equipment.
1.3.2 Internal Battery
Internal lithium battery. In order to give full play to the performance of the battery, in the
beginning of the use of this instrument, please use the internal battery power, the battery power

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consumption, and then charge the battery, the first charging time should not be less than 12 hours.
When the temperature is too high, the charging temperature of the battery in the battery is 0
DEG C to about 50 DEG C. The instrument is idle for more than 2 months or more, should be
timely to keep charging the battery; not without removing the battery; please don't let the battery
near the fire, strong heat; do not open or damage the battery; long-term storage equipment, the
battery should be removed. When the battery is stored for a long time:-20℃～45℃。
1.3.3 Laser Safety
In the use of this instrument, please pay attention to avoid the eyes of laser output, but also
not in the test, open end fiber; when the instrument after use, please cover the light output of the
dust cap.

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When the instrument is visible red light function is open, please don't use the output port
eyes of red light, don't look at this time also connected to the output end of the optical fiber light.
1.3.4 Instrument Maintenance
1. The whole machine is guaranteed for 24 months, and the battery is guaranteed for 6 months。
2. Optical output connectors and other devices are vulnerable parts, such devices are not within
the scope of warranty.
3. Because of the external factors can not resist the instrument damage or performance
degradation, will not be within the scope of warranty.
4. Due to improper operation of the instrument damage or performance degradation, will not
be within the scope of warranty.

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5. Without the permission of the company or the designated authorized unit, is strictly
prohibited to disassemble the instrument, otherwise it will lose the warranty!
1.3.5 Instrument Return
If you need to return the product for product calibration or other reasons, please contact
your supplier in advance, and a brief description of the reasons for the return of the product, in
order to provide you with more timely and effective service.
Please note that when the product returns:
Using polyethylene thin soft pad instrument package, with perfect protection
instrument housing;
Please use a hard packing box to ensure that the instrument is filled with at least 3 cm

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thick;
Fill in the product maintenance card correctly, including company name, address,
contact person, telephone number, problem description and so on;
Deliver the goods to your supplier in a reliable manner.

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Chapter 2 OTDR Introduction
2.1 OTDR Basic Knowledge Introduction
OTDR is a precision optical measuring instrument of Rayleigh scattering and Finel
reflection transmission in fiber produced by laser backscatter principle is made, it is widely used
in optical fiber, optical cable installation, maintenance and repair, monitoring applications. It can
be used to measure the length, attenuation, quality and fault location of fiber optic cable.
The light in the optical fiber transmission, due to defects in doped fiber component
inhomogeneity or fiber link itself, the optical pulse propagating in fiber Rayleigh scattering
occurs, where a portion of the optical signal will be shot into the opposite direction along the
veins are scattered back, so it is called the Rayleigh backscattering, through the observation of

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Rayleigh timing after the change of scattering light signal intensity, accurate measurement of the
fiber optic cable to the loss distribution, the quality of the connection properties.
According to the theory of light transmission, when the light is in the process of
communication, there are two kinds of transmission medium with different refractive index
boundary (such as fracture or connector, fiber end), will Fresnel reflection, through the regular
reception of this Fresnel reflection signal, can be accurately located along the length of the fiber
discontinuous point. The size of the reflection depends on the refractive index difference and the
smoothness of the boundary surface.

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2.2 OTDR Test Event Type
OTDR test event is an abnormal point that causes a sudden change in loss or reflected
power. Including all kinds of connection points in the optical fiber link, melting contact and
bending, crack or fracture and so on.
There are two main types of OTDR test events: reflection events and non reflective events.
2.2.1 Reflection Events
When measured along the optical fiber laser from the OTDR pulse, if the activity
connection point, or the end of the fiber, the refractive index due to mutation causes will produce
the phenomenon of reflection, will be part of the optical signal along the optical fiber. To return
to the instrument, the instrument through the acceptance of the reflected signals, will detect the

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reflection event. In the OTDR test curve, it is shown that the peak width and amplitude are
determined by the pulse width and the reflected intensity.As shown in figure 2-1.
Figure 2-1 Reflection Events Diagram

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2.2.2 Non Reflective Events
When the laser emitted from the OTDR pulse to be measured along the optical fiber
transmission, such as melting point or bending leads to some loss of energy when the location
does not exist at this time due to mutations in the refractive index, so the reflection phenomenon
will not occur, or can be ignored. OTDR detects the difference of the energy change of the
receiving end of the OTDR, which can be used to detect the non reflection event parameters.
Non reflection events declined as a signal energy in the test curve of OTDR, the decrease of said
power loss situation.As shown in Figure 2-2.

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Figure 2-2 Non Reflection Events Diagram
2.3 OTDR Dynamic Range
Dynamic range is an important parameter of optical time domain reflectometer (dB). This
parameter is expressed as the maximum optical loss of OTDR that can be analyzed from the
backscatter level of the instrument output port to a specific noise level. In the practical use of