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关键词:OTDR
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PREFACE Thank you for using the Optical Time Domain Reflectometer produced by Institute of CHINA! This product integrates high-grade, high-precision and advanced technology and has the highest performance-to-price ratio among similar products. Please read this Guide carefully for convenient use. We will assume trying our best to meet your needs as our responsibility to provide high quality measuring instruments for you and also bring you first-class after-sale services. We always persist in “Good Quality, Satisfied Service” and promise to offer satisfied products and service for you. Welcome to inquire by: STATEMENT This Guide is the first edition of the 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 Institute of CHINA. Institute of CHINA 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. Institute of CHINA 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 Institute of CHINA. Other entities and individuals 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. STATEMENT Please don’t attempt to disassemble or modify any part unspecified in this Guide. Self-disassembly may lower electromagnetic shielding efficiency and cause damage to the instrument, etc. to affect the reliability of the product. If under warranty, we will not provide free repair. CONTENTS Safety Requirements 1 Warnings for Use of Instrument 2 Precautions for Use of Instrument 2 Maintenance 3 Calibration Requirements 4 Warranty and Maintenance of Instrument 4 Chapter 1 Overview 5 1. Overview of Instrument …5 2. Composition of Instrument 5 2.1 Basic Composition 5 2.2 Optional OTDR Modules 6 2.3 Optional Accessories 7 3. Description of Instrument Panel 8 3.1 Front Panel of Instrument 8 3.2 Right Panel of Instrument 8 3.3 Back Panel of Instrument 9 3.4 Description of Panel Keyboard and Active Display 9 4. Description of Rechargeable Battery 10 Chapter 2 Main Screen 11 Chapter 3 Optical Power Meter Module 12 Chapter 4 Optical Source Module 14 Chapter 5 Visible Fault Locator Module 15 Chapter 6 Audio Detection Module 16 Chapter 7 Optical Time Domain Reflectometer (OTDR)-Operating Instruction 17 1. Description of Main Screen 17 2. Description of Event List Window 18 3. Overview of Menu Structure and Function 20 3.1 Structure and Function of First Menu 20 3.2 Brief Introduction of Operating Subwindow Menu 20 4. Description of OTDR Panel Key Function 21 Chapter 8 How to Use 24 1.Testing Optical Fiber Chain 24 1.1 Description of Test Modes, Parameters and Items 25 1.2 Set OTDR Test Conditions 32 1.3 Test Fiber Link 50 1.4 Analyzing Waveform Trace and Checking Event Table 51 2.Operation for Cursor and Test Trace 53 2.1 Move Cursor 53 2.2 Set Active Cursor 53 2.3 Zoom in & out and Initialize Waveform Trace 54 2.4 Move Waveform Trace Vertically 54 3. Measure Fiber Length and Loss 54 3.1 Measure Fiber Length 54 3.2 Measure Fiber Average Loss 55 3.3 Measure Splice Loss 56 3.4 Measure Reflection Loss 56 4. File Management 57 4.1 Save Waveform File 57 4.2 Read Waveform File 59 4.3 Delete Waveform File 60 4.4 Copy the Files between OTDR and USB Disk/SD Card 61 4.5 Clear the Traces Displayed on the Screen 62 5. Set Fiber Information 62 6．Set Reference Origin 64 7．Trace Selection and Comparison 64 8. View System Information 65 9. Print Test Report 66 10. Help 67 11. System Upgrade 68 12. Common Faults and Treatment 69 Chapter 9 Operating Principle 71 1. Operating Principle 71 2. Description of Event Point Type 71 Chapter 10 Technical Parameters 72 1. General Characteristics 72 2. Main Functions 72 3. Main Technical Specification 73 3.1 OTDR Function 73 3.2 VFL Function (Option) 73 3.3 Optical Power Meter Function (Option) 73 3.4 Optical Source Function (Option) 74 3.5 Vibration Detecting Function (Option) 74 Appendix A Cleaning Optical Output Port 75 Appendix B Direction for Use of the Stimulation Analysis Software 77 Appendix C Ordering information 81 Safety Requirements 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. Institute of CHINA 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 Institute of CHINA or its authorized service personnel. Safety Terminology : It calls user’s attention to a procedure, operation mode, or the like. Failure to correctly operate or adhere to rules could result in personal injury or damage to the instrument. : It calls user’s attention to a procedure, operation mode, or the like. Failure to correctly operate or adhere to rules could result in damage to all or part of the instrument. : It gives the information helpful for the use and maintenance of the instrument. Warnings for Use of Instrument External DC Power Supply External DC power supply must meet the following requirements: 17V~21V, >2.**, 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 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. Precautions for Use of Instrument AC/DC Adapter Please use the adapter provided by Institute of CHINA for power supply. Use of other type of adapter can damage the instrument. Internal Battery (1) For the best battery performance, the instrument shall be powered with internal battery first at the beginning of use until the battery is exhausted, and then it can be charged 2~3 times. (2) If the battery has been in storage for a long time, it shall be charged and discharged circularly as above for the first time use to achieve an optimum performance. (3) In order to prolong the life of internal battery, remove external power supply after charging. For a long-time use of external power supply, please remove the internal battery and keep it properly, before that, please charge it first, and make charge-discharge cycle once every 3 months to ensure battery performance. (4) If the instrument has not been used for a long time, please charge the battery to make charge-discharge cycle before use. For a long-time storage, remove the battery, before that, please charge it first. During storage, make charge-discharge cycle once every 3 months to ensure battery performance, otherwise excessive self-discharge of battery may cause damage to it. (5) The temperature range for long storage time (the storage time is longer than 6 months) of battery is: -20℃~45℃. The temperature range for short storage time (the storage time is shorter than or equal to 6 months)of battery: -20℃～60℃. (6) The temperature range of charging battery is 5℃~40℃. If ambient temperature is too high or too low, charging will stop automatically, which will cause unfilled charge. (7) The time of charging may not be too long, otherwise, it will reduce battery life and even damage it. (8) To achieve better performance and more accurate battery capacity indicator, please maintain a complete charge or discharge process, i.e. don’t discharge during charging; don’t charge during discharging. LCD Display (1) Don’t use any sharp object to press LCD, don’t give heavy impact to LCD, otherwise it may damage it. (2) Don't pollute LCD with any organic solvent or contaminant such as acetone, motor oil, antifreezing fluid, factice, etc., otherwise, it will cause LCD works abnormally. (3) Clean LCD with silk cloth or soft cloth. Don’t use organic solvent to clean it, otherwise, it may damage the LCD. Use of OTDR (1) There is precise and fragile ceramic locating core inside the optical output connector of the instrument, so please be sure to insert optical fiber plug gently and parallelly and align it with locating pin and then tighten it. (2) When performing measurement with this instrument, you must keep the inside and end face of optical output connector clean and avoid polluting the optical output connector with factice, etc. contaminant, otherwise, it will cause measurement error and even that the instrument is incapable of testing optical fibers. (3) If possible, please make the end of the optical fiber under test point to an unreflected object during testing. Maintenance (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 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 Optical Time Domain Reflectometer once every year. Please dial service telephone for details. Warranty and Maintenance of Instrument (1) Warranty for the entire instrument (except battery and the following consumables) is 18 months and the warranty for battery is 3 months. The gifts given during product promotion are not within the scope of warranty. (2) The optical output connector, etc. parts of the instrument are consumables, so they are not within the scope of warranty. (3) Damage to the instrument or lower performance due to force majeure and human factor is not within the scope of warranty. (4) Lowering battery performance with the use of the instrument for a period belongs to normal battery loss, which is not within the scope of warranty. (5) The repair of instrument should be done by Institute of CHINA or its authorized repair company. The disassembly and repair of this instrument by any other company or individual are all illegal, which will void warranty to the instrument, and meanwhile, Institute of CHINA reserves the right to pursue offender’s legal responsibility. (6) Unauthorized disassembly will void the warranty of the instrument automatically. Removal of fastening screws or seals will void the warranty of the instrument. Note: Institute of CHINA reserves the right to make any change in the design or construction of Optical Time Domain Reflectometer at any time without any obligation or responsibility to perform free improvements or replacements whatsoever on products purchased. Accessories, including but not limited to indicator lamps and batteries etc. used for this product are not covered by the warranty herein. Chapter 1 Overview 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. Main functions and features of instrument: ? 0.8m extra-short event dead zone, easy to test optical fiber jumper; ? 45dB high dynamic range, 128k data sampling points; ? Most advanced integrative double-color double-material mould technology in the industry, solid and durable; ? Advanced antireflection LCD, visible display interface even outdoor; ? Many test modes, touchscreen and shortcut operation; ? Communication light auto monitoring function; ? Double USB ports for connection of external USB disk & printer and communication with PC via Sync Active software; ? Support Bellcore GR196 and SR-4731 file formats; ? WinCE windows operating system, an operating interface with many languages; ? Built-in optional visual fault locator (VFL), optical power meter, optical source, audio detection, etc. functions; ? The type of optical output connector of OTDR can be replaced randomly, end face is clean and convenient; ? Update of application software system, unnecessary to return it to original factory. 2. Composition of Instrument 2.1 Basic Composition The basic composition of OTDR is shown in Table 1-1. Table 1-1 Basic Composition of OTDR Item Name Quantity Mainframe OTDR 1 Standard Accessories Power adapter 1 Power line 1 User’s Guide 1 CD 1 Multifunctional fiber adapter SC, ST 1 Engineering plastic case 1 2.2 Optional OTDR Modules The optional modules of OTDR are showed in Table 1-2. Table 1-2 Optional Modules of OTDR Module No.1 Operating Wavelength Optical Fiber Type Dynamic Range2 (dB) Event Dead Zone3 (m) Attenuation Dead Zone3 (m) –1101 1,310nm Single mode 45 2 10 –1102 1,550nm Single mode 43 2 10 –1103 1,625nm Single mode 38 1 10 –1104 1,625nm (built-in filter) Single mode 36 1 10 –1105 1,650nm Single mode 38 1 10 –1106 1,650nm (built-in filter) Single mode 36 1 10 –1107 1,490nm Single mode 36 1 10 –1108 1,383nm Single mode 36 1 10 –1201 850nm Multimode 26 2.5 15 –1202 1,300nm Multimode 36 2 13 –2101 1,310/1,550nm Single mode 42 / 40 2/2 10/10 –2102 1,310/1,550nm Single mode 40 / 38 1/1 10/10 –2103 1,310/1,550nm Single mode 37 / 35 1/1 10/10 –2104 1,550/1,625nm Single mode 38 / 38 1/1 10/10 –2105 1,550/1,625nm (built-in filter) Single mode 36 / 36 1/1 10/10 –2106 1,550 /1,650nm Single mode 38 / 38 1/1 10/10 –2107 1,550 /1,650nm (built-in filter) Single mode 36 / 36 1/1 10/10 –2108 1,310/1,550nm Single mode 45 / 43 2/2 10/10 –2201 850nm/1,300nm Multimode 26 / 36dB 2.5/2 15/13 –3101 1,310/1,490/1,550nm Single mode 39 / 34/ 38 1/1/1 10/10/10 –3102 1,310/1,550nm/1,625nm Single mode 39 / 38 / 36 1/1/1 10/10/10 –3103 1,310/1,550nm/1,625nm (built-in filter) Single mode 37/ 36 / 34 1/1/1 10/10/10 –3104 1,310/1,550 /1,650nm Single mode 39 / 38 / 36 1/1/1 10/10/10 –3105 1,310/1,550/1,650nm (built-in filter) Single mode 37/ 36 / 34 1/1/1 10/10/10 –4001 850/1,300/1,310/1,550nm Single/ multi mode 24/34/34/34 2/2/1/1 15/13/10/10 –4101 1,310/1,490/1,550/1,625nm Single mode 35/32/34/34 1/1/1/1 10/10/10/10 –4102 1,310/1,383/1,550/1,625nm Single mode 35/32/34/34 1/1/1/1 10/10/10/10 Notes: 1. One and only one standard module must be selected.All specifications are for a Ambient temperature of 23℃±2℃ with FC/UPC connector unless otherwise specified. 2. SNR=1, more than 500 averaging times, using 20us pulse. 3. Dead zone test mode (range ≤0.8km, 5ns pulse), reflection loss ≥40dB, typical value 2.3 Optional Accessories The options of OTDR are shown in Table 1-3. Table 1-3 Options of OTDR No. Name Model or Specification Explanation 1 USB disk 2GB Save test data 2 SD card 2GB Save test data 3 Data synchronization transmission line Communicate with computer 4 Standby battery pack 6417LB-1191 Standby battery 5 FC/SC, FC/ST adapter Test the optical fiber of corresponding joint 6 Optical fiber patch cord FC/UPC to FC/APC Optical fiber patch cord 7 Optical fiber patch cord FC/UPC to SC/UPC Optical fiber patch cord 8 Optical fiber patch cord FC/UPC to ST/UPC Optical fiber patch cord 3. Description of Instrument Panel 3.1 Front Panel of Instrument 3.2 Right Panel of Instrument 3.3 Back Panel of Instrument 3.4 Description of Panel Keyboard and Active Display (Please see section 4 “Description of OTDR Panel Key Function” of Chapter 7 for details) 4. Description of Rechargeable Battery The battery in OTDR is special lithium battery. 4.1 Batter Indicator and Charge Indicator When the instrument is powered on, the battery indicator at lower right shows the current remaining capacity of battery, and charge indicator also appears. Meanwhile, the system information window also shows the percentage of current remaining capacity of battery. When the charge indicator appears, it indicates the instrument has been connected with external power supply and is using the external power supply to work, and meanwhile the battery is charged. When the charge indicator does not appear, it indicates the instrument is using internal battery to work. When the instrument is working with external power supply for charge, the power button is red; when the battery is charged fully, the power button is green; when the external power is cut off, the power button indicator lamp goes out. 4.2 Charging the Battery (1) The temperature range of battery charge is: 5℃~40℃. It will stop charging automatically in case of exceeding the temperature range during charging, which will cause that the battery is not fully charged. Overhigh temperature will cause damage to the battery and affect its life. (2) The charging time is less than or equal to 6 hours when this instrument is off. (3)The charging time is less than or equal to 8 hours when the instrument is on. (4) Overlong charging time will affect battery life and even cause damage to it. 4.3 Precautions In order to prevent the rechargeable battery from excessively discharging, the battery inside the instrument should be charged in time through external power adapter . Long-time excessive discharge of the rechargeable battery will affect battery life and even cause damage to it. Chapter 2 Main Screen OTDR can have the optional functions of optical power meter, optical source, visible fault locator (VFL) and audio detection, etc. as required. When function modules return to the main screen, the screen for function module selection will appear as shown in Figure 2-1. ? Touchscreen Operation: Press any one of the five buttons, i.e. OTDR, OPM, Optical Source, VFL or Audio Detection in the screen to enter the operating interface of corresponding module so as to achieve its corresponding function. Press the drop-down button of default module to eject a selection box as shown at the left of the above figure, press the item required, so that the operating interface of the selected module can be entered directly after poweron next time. ? Default Module: After selection, the selected module interface will be entered after poweron next time. ? Key Operation: Press / to select any one of the five buttons in the screen, and then press to enter corresponding module operating interface. Use / to move active cursor to the drop-downs of default module and then use / to select a module as default one for next poweron, after selection, the operating interface of the selected module can be entered directly for next poweron. ? Directly press the drop-down box of default module on the touchscreen to select one. ? Language Selection: Select the language of interface. Operate the touchscreen and keys as above. ? System Date: Change system date and press to confirm the change. ? Press the time item to be changed in the touchscreen, a small button will appear below the item, and then press the up and down button via touchscreen to change the selected time item. ? Use / to select the time item to be changed and then a small button will appear below the item; press / to change the selected time item. ? After change, press 【Enter】or to confirm the change. Chapter 3 Optical Power Meter Module If your instrument has the function of optical power meter, please press the button【Optical Power Meter】as shown in Figure 2-1 to enter the operating interface of optical power meter as shown in Figure 3-1. The functions and operations of all menu buttons are described as follows: ? 【Start】: Start or stop power meter test with the following three methods. ? Press this button to start the power meter module for test, meanwhile, the button turns to 【Stop】, press this button again to stop power meter test, then, this button turns to【Start】. ? Pressing the key on the keyboard can realize the above function. ? Press the key on the keyboard to move active cursor to menu bar as shown in the figure below, and then menu item will show a small button. Then, pressing will start or stop power meter test function. ? 【Wave】: Change the test wavelength of power meter. ? Press this button to change the test wavelength of power meter. ? Press the key on the keyboard to move active cursor to menu bar, and then menu item will show a small button. Use / to move the small button to this menu item and then press to confirm wavelength change. ? 【Setup】:Enter setup sub-menu as shown in the figure below. Press the menu button via touchscreen or use the keyboard to realize the function of each button with the same method as above. Setup sub-menu is also available by pressing the key on the keyboard. ? 【Range】: ? 【Times】: Press this menu button to eject the drop-down box for times selection, and select times by pressing touchscreen or / ? 【Reference】: Set the current measured value as reference value. ? 【dBm/W】: Set the current test mode as dBm test or mw test. ? 【Interval】: Set the interval of saving measured values. Selecting indicates there is no interval for saving values; otherwise, a measured value will be saved at the intervals selected. ? 【Memory/SD】: Set storage path as memory or SD card. ? 【Return】: Return to previous menu. ? 【Abs./ Rel.】: Set the current data realization mode as relative or absolute mode. ? 【Zero】: Reset the power meter to zero. ? 【Save】：Used to save the test data of power meter. This menu item is only available in test state. In the test state of power meter, press this button (or use keyboard to select this item and then press to confirm) to save the data obtained in current test to file according to the set interval and save path. ? 【Return】: Exit from the operating interface of power meter to return to the main screen. Notes: The memory only can save a power meter data file -OPM.dat, therefore, when selecting memory as storage path, please pay attention to timely outputting data to SD card or USB disk, otherwise, the original file will be covered for next saving. Chapter 4 Optical Source Module If your instrument has the function of optical source, please press the button【Optical Source】as shown in Figure 2-1 to enter the operating interface of optical source as shown in Figure 4-1. The functions and operations of all menu buttons are described as follows: ? 【Start】: Start or stop optical source test with the following three methods. ? Press this button to start the optical source module for test, meanwhile, the button turns to 【Stop】, press this button again to stop optical source test, then, this button turns to【Start】. ? Pressing the key on the keyboard can realize the above function. ? Press the key on the keyboard to move active cursor to menu bar as shown in the figure below, and then menu item will show a small button. Then, pressing will start or stop optical source test function. ? 【Wave】: Change the test wavelength of optical source. ? Press this button to change the test wavelength of optical source. ? Press the key on the keyboard to move active cursor to menu bar, and then menu item will show a small button. Press / to move the small button to this menu item, then, press to confirm wavelength change. ? 【Mode】: Change the working mode of optical source. The working mode of optical source is CW, 270Hz, 1kHz and 2kHz ? Pressing this button will change the working mode of optical source. ? Press the key on the keyboard to move active cursor to menu bar, and then menu item will show a small button. Press / to move the small button to this menu item, then, press to confirm the change of working mode. ? 【Return】: Exit from the operating interface of optical source function to return to the main screen. Chapter 5 Visible Fault Locator Module If your instrument has the function of VFL, please press the button【VFL】 as shown in Figure 2-1 to enter the operating interface of VFL as shown in Figure 5-1. The functions and operations of all menu buttons are described as follows: ? 【Start】: Start or stop VFL module test with the following three methods. ? Press this button to start the VFL module for test, meanwhile, the button turns to【Stop】, press this button again to stop VFL test, then, the button turns to 【Start】. ? Pressing the key on the keyboard also can realize the above function. ? Press the key on the keyboard to move active cursor to menu bar as shown in the figure below, and then menu item will show a small button. Then, pressing will start or stop VFL test function. ? 【Mode】: Change the working mode of VFL. The working mode of VFL is CW, 1Hz and 0.5Hz ? Pressing this button will change the working mode of VFL. ? Press the key on the keyboard to move active cursor to menu bar, and then menu item will show a small button. Press / to move the small button to this menu item, then, press to confirm the change of working mode. ? 【Return】: Exit from the operating interface of VFL function to return to the main screen. Chapter 6 Audio Detection Module If your instrument has the function of audio detection, please press the button 【Audio Detection】as shown in Figure 2-1 to enter the operating interface of Audio Detection Module as shown in Figure 6-1. The functions and operations of all menu buttons are described as follows: ? 【Start】: Start or stop audio detection module test with the following three methods. ? Press this button to start the audio detection module for test, meanwhile, the button turns to【Stop】, press this button again to stop audio detection test, then, the button turns to 【Start】. ? Pressing the key on the keyboard also can realize the above function. ? Press the key on the keyboard to move active cursor to menu bar as shown in the figure below, and then menu item will show a small button. Then, pressing will start or stop audio detection test function. ? Volume Control: Press the key / on the keyboard to increase volume; press the key / on the keyboard to reduce volume. ? 【Return】: Exit from the operating interface of audio detection function to return to the main screen. Chapter 7 Optical Time Domain Reflectometer (OTDR)-Operating Instruction Press the button 【OTDR】as shown in Figure 2-1 to enter the operating interface of OTDR as shown in Figure 7-1. The operating interface of OTDR is composed of main screen and operating subwindow. After the instrument enters the operating interface of OTDR module, the display will show the main screen of OTDR as shown in Figure 7-1. The menu bar in the main screen shows menu items. Press different menu buttons to enter corresponding sub-menus or finish corresponding functions. 1. Description of Main Screen The schematic of main screen is shown in Figure 7-1. (1): Current system clock (2): Display of test results The contents of displaying correspond to test items. Test results are calculated according to the position of current cursor. (3): Entirely display trace It always displays the entire waveform of trace. (4): Reference point (5): Current active cursor Active cursor is red, which can be moved by / or pressing touchscreen. The other cursors are black. Active cursor can be set circularly by among the cursors on the screen. (6): The distance between active cursor and reference point (7): Display of current average times No average times are displayed in real-time test mode. (8): Menu bar In the main interface, the menu bar displays menu items. (9): Display of test conditions It displays the current test range, wavelength, pulse width, test mode, etc. test conditions. (10): Name and storage date of current file If the current trace is that saved in the current file, it will display the name and storage date of current file. (11): Origin distance position The distance between the current set reference origin and the test port of OTDR *1 (12): Indicator of connection of external adapter It indicates external adapter has been connected and the instrument is using external power supply to work. (13): Indicator of current battery capacity It indicates the current remaining battery capacity. (14): Indicator of current test trace color It indicates the line color of trace of current serial number. *2 (15): Vertical scale (dB/) (16): Horizontal scale (m/ or km/ or ft/ or kft/) (17): Icon of indicating current active test trace: Blue color indicates the current active trace is Trace 1; dark green color indicates the current active trace is Trace 2; red color indicates the current active trace is Trace 3. 2. Description of Event List Window In the main screen displayed in Figure 7-1, press the button【Analyse】to analyze the current trace and display event list. If the current event table has contents, press the button 【Event Table】to show event list. The event list window is shown in Figure 7-2. All the contents in the event list are shown as follows: (1) Event Type: indicates this event point is down event point. : indicates this event point is up event point. : indicates this event point is reflection event point. : indicates this event point may be the end of optical fiber. (2) No: The serial number of current event point. (3) Dis (km): The distance between this event and reference origin. (4) Average (dB/km): The average loss of the optical cable before the current event point. (5) Splice Loss (dB): The splice loss measured at current event point * indicates the current tested splice loss value is larger than the set pass threshold of splice loss. (6) Reflection Loss (dB): The reflection loss measured at current event point * indicates the current tested reflection loss value is larger than the set pass threshold of reflection loss. (7) Link (dB): The total loss of the fiber section from current event point to reference origin. 3. Overview of Menu Structure and Function 3.1 Structure and Function of First Menu Main screen displays main menu bar by default, including seven menu buttons as shown in Figure 7-3. All the button functions on the menu bar are described as follows: (Pressing corresponding menu item will realize the following function. See “Chapter 8 How to Use OTDR Module) 【System】: Enter system sub-menu to realize the functions of system information display, touchscreen calibration, system program update, help information display and return to main screen (interface of operating module selection), etc. 【Setup】: Enter parameter setup sub-menu to realize the functions of OTDR test condition setup, reference origin setup, optical cable information setup, etc. 【Start】: This button is used to control optical fiber test of OTDR or stop test. Pressing this button turns the button to 【Stop】, then, OTDR will test the optical fiber under test according to the set test condition; Pressing this button again turns the button to【Start】and OTDR will stop test If in average test, auto test and dead zone test mode, the test is finished, this button will turn to 【Start】automatically and meanwhile OTDR stops test. 【File】: Enter file operation sub-menu to realize the functions of reading, saving, deleting file, printing and transferring file and clearing the trace displayed on screen, etc. 【Analyse】: Analyze the current trace to give event list. If event point is unavailable, a prompt will be given. 【Event Table】: Displaying event list and event operation sub-menu to realize the functions of deleting, adjusting and adding event point and modifying event analyse threshold, etc. 【Trace 1】: Display trace selection window in which the trace number can be selected to switch the current active trace among Trace 1, 2 & 3. Trace 1 is blue; Trace 2 is dark green and Trace 3 is red. 3.2 Brief Introduction of Operating Subwindow Menu Press menu buttons in the main menu bar to enter different sub-menus (or executing corresponding function), press different sub-menu buttons in each sub-menu bar to eject corresponding operating window to finish different functions, such as, saving, reading, deleting and copying file and viewing event list, setting OTDR test parameters, displaying system and help information, etc. Please see “Chapter 8 How to Use OTDR Module” for details.
