CHROMATIC DISPERSION ANALYZER FTB-5800 for FTB-400 NETWORK TESTING USER GUIDE
Copyright © 2002–2007 EXFO Electro-Optical Engineering Inc. All rights reserved. No part of this publication may be reproduced, stored in a retrieval system or transmitted in any form, be it electronically, mechanically, or by any other means such as photocopying, recording or otherwise, without the prior written permission of EXFO Electro-Optical Engineering Inc. (EXFO). Information provided by EXFO is believed to be accurate and reliable.
Contents Contents Certification Information ........................................................................................................ v 1 Introducing the FTB-5800 Chromatic Dispersion Analyzer ........................ 1 Main Features .........................................................................................................................1 Basic Theory ............................................................................................................................
Contents 6 Exporting CD Analyzer Files with the File Export Tool .............................65 Starting and Exiting the File Export Tool ...............................................................................65 Setting Export Parameters ....................................................................................................67 Exporting Chromatic Dispersion Files ....................................................................................69 7 Maintenance ......................
Certification Information Certification Information F.C.C. Information Electronic test equipment is exempt from Part 15 compliance (FCC) in the United States. However, compliance verification tests are systematically performed on most EXFO equipment. Information Electronic test equipment is subject to the EMC Directive in the European Union. The EN61326 standard prescribes both emission and immunity requirements for laboratory, measurement, and control equipment.
Certification Information DECLARATION OF CONFORMITY Application of Council Directive(s): Manufacturer’s Name: Manufacturer’s Address: Equipment Type/Environment: Trade Name/Model No.: Year of Conformity Assessment: 73/23/EEC - The Low Voltage Directive 89/336/EEC - The EMC Directive EXFO ELECTRO-OPTICAL ENG.
1 Introducing the FTB-5800 Chromatic Dispersion Analyzer In today’s advanced optical network, chromatic dispersion management has become an important issue. Present-day networks must deal with high data rates, high channel counts and long distances between optical-electrical-optical regenerators. Main Features The FTB-5800 Chromatic Dispersion Analyzer is a reliable solution to chromatic dispersion management.
Introducing the FTB-5800 Chromatic Dispersion Analyzer Main Features The architecture of the FTB-5800 Chromatic Dispersion Analyzer places the wavelength selector in the receiver, which avoids the necessity for any communication between the receiver and the source. This allows you to take measurements even though the source is kilometers away, without interfering with the accuracy of results.
Introducing the FTB-5800 Chromatic Dispersion Analyzer Basic Theory Basic Theory Chromatic dispersion is the natural broadening of light pulses as they travel through optical fiber. The propagation characteristics of each wavelength depend on the refractive index of the medium and on the non-linearity of the propagation constant. These affect the travel time of each wavelength through the fiber medium.
Introducing the FTB-5800 Chromatic Dispersion Analyzer Conventions Conventions Before using the product described in this manual, you should understand the following conventions: WARNING Indicates a potentially hazardous situation which, if not avoided, could result in death or serious injury. Do not proceed unless you understand and meet the required conditions. CAUTION Indicates a potentially hazardous situation which, if not avoided, may result in minor or moderate injury.
2 Getting Started with Your Chromatic Dispersion Analyzer IMPORTANT The power consumption of the module is relatively high. Therefore, it is not recommended to use it with battery or to activate other power consuming modules at the same time on the platform. Inserting and Removing Test Modules CAUTION Never insert or remove a module while the FTB-400 Universal Test System is turned on. This will result in immediate and irreparable damage to both the module and unit.
Getting Started with Your Chromatic Dispersion Analyzer Inserting and Removing Test Modules Retaining screw hole at the back Connector pins at the back FTB-400 right panel (7-slot receptacle shown) Identification sticker facing down Protruding edges on top 4. Insert the protruding edges of the module into the grooves of the receptacle’s module slot. 5. Push the module all the way to the back of the slot, until the retaining screw makes contact with the receptacle casing. 6.
Getting Started with Your Chromatic Dispersion Analyzer Inserting and Removing Test Modules 7. While applying slight pressure to the module, turn the retaining screw clockwise until it is tightened. This will secure the module into its “seated” position. Turn retaining screw knob clockwise FTB-400 left panel (7-slot unit shown) When you turn on the unit, the startup sequence will automatically detect the module.
Getting Started with Your Chromatic Dispersion Analyzer Inserting and Removing Test Modules To remove a module from the FTB-400 Universal Test System: 1. Exit ToolBox and turn off your unit. 2. Position the FTB-400 so that the left panel is facing you. 3. Turn the retaining screw counterclockwise until it stops. The module will be slowly released from the slot. Turn retaining screw knob(s) counterclockwise FTB-400 left panel (7-slot unit shown) 4. Place the FTB-400 so that the right panel is facing you.
Getting Started with Your Chromatic Dispersion Analyzer Inserting and Removing Test Modules CAUTION Pulling out a module by a connector could seriously damage both the module and connector. Always pull out a module by its casing. 6. Cover empty slots with the supplied protective covers. CAUTION Failure to reinstall protective covers over empty slots will result in ventilation problems.
Getting Started with Your Chromatic Dispersion Analyzer Starting the Chromatic Dispersion Analyzer Application Starting the Chromatic Dispersion Analyzer Application Your FTB-5800 Chromatic Dispersion Analyzer module may be fully configured and controlled from its dedicated ToolBox application. Note: For details about ToolBox, refer to the FTB-400 Universal Test System user guide. To start the Chromatic Dispersion Analyzer application: 1.
Getting Started with Your Chromatic Dispersion Analyzer Starting the Chromatic Dispersion Analyzer Application The main window (shown below) contains all the commands required to control the Chromatic Dispersion Analyzer: Tabs RGD parameters panel Source type Fiber Information panel Intensity meters Status bar Button bar Title Bar The title bar is located at the top of the main window. It displays the module name and its position in the FTB-400 Universal Test System.
Getting Started with Your Chromatic Dispersion Analyzer Exiting the Application Status Bar The status bar, located at the bottom of the main window, identifies the current operational status of the FTB-5800 Chromatic Dispersion Analyzer. Control mode Local: Module controlled locally only. Remote: Module controlled remotely, but local commands can also be used (some products only). Lockout: Module controlled remotely only.
3 Setting Up Your Chromatic Dispersion Analyzer The parameters you set will be kept in memory after turning off the FTB-400 Universal Test System. Setting the Wavelength Range You can set the wavelength range within which you want to perform your acquisitions. You can work with predefined bands (C, L or C+L) or set the wavelength range by using the custom option. This option could be useful to perform acquisitions in a specific area of a band or between two bands.
Setting Up Your Chromatic Dispersion Analyzer Setting the Wavelength Step Setting the Wavelength Step The wavelength step corresponds to the interval, in nanometers, at which the system will take RGD measurements within the selected wavelength range. You can either choose one of the preprogrammed step or specify the desired value with the custom option. Note: The smaller the step you choose, the higher the accuracy of your measurement will be and the longer the acquisition will take.
Setting Up Your Chromatic Dispersion Analyzer Setting the Wavelength Step To set the wavelength step using the custom option: 1. In the Parameters tab, set the Step dial to Custom. 2. Enter the desired value in the Step box. The value must be between 0.1 nm and the wavelength range you chose previously.
Setting Up Your Chromatic Dispersion Analyzer Setting the Averaging Time Setting the Averaging Time The averaging time is the time the system spends on one specific point or wavelength. You can either choose one of the preprogrammed values or specify the desired averaging time with the custom option. Note: The stronger the signal, the faster a signal-to-noise ratio (SNR) will be reached. If your signal is weak, increase the averaging time in order to increase the accuracy of your results.
Setting Up Your Chromatic Dispersion Analyzer Specifying the Fiber Under Test Specifying the Fiber Under Test Before making an acquisition, you must also enter information on the fiber you are going to test. This information includes the fiber type, the data fit and the fiber length. You can also specify the distance units to be used. Whether you know the fiber length or not will affect your results display. ³ Unknown fiber length: results will show the total dispersion.
Setting Up Your Chromatic Dispersion Analyzer Specifying the Fiber Under Test To specify the fiber under test: In the Parameters tab, undr Fiber Information, set the fiber parameters. ³ In the Fiber Type list, select the appropriate value. Note: If you do not know the fiber type, select “Unknown Fiber Type”. If your fiber is made of more than one type of fiber, either enter the dominant fiber type or select “Unknown Fiber Type”.
Setting Up Your Chromatic Dispersion Analyzer Specifying the Fiber Under Test To modify the distance units: 1. On the button bar, click the Setup button, to access the Application Setup dialog box. 2. Under Distance Unit, select the desired units. 3. Click OK to confirm the new settings or Cancel to discard them.
Setting Up Your Chromatic Dispersion Analyzer Defining the Automatic Fiber Name Format Defining the Automatic Fiber Name Format Each time you make a new acquisition, the fiber name changes automatically according to a pattern you will have previously defined. This name is made of a static part (prefix) and a variable part that will be incremented. The increment can be positive, negative or null (zero). Entering zero gives you the opportunity to use the same acquisition fiber name.
Setting Up Your Chromatic Dispersion Analyzer Defining the Automatic Fiber Name Format To define the fiber name format: 1. On the button bar, click Setup. 2. Under Autonaming, set the various parameters according to your needs.
4 Operating Your Chromatic Dispersion Analyzer Installing the EXFO Universal Interface (EUI) The EUI fixed baseplate is available for connectors with angled (APC) or non-angled (UPC) polishing.A green border around the baseplate indicates that it is for APC-type connectors. Green border indicates APC option Bare metal (or blue border) indicates UPC option To install an EUI connector adapter onto the EUI baseplate: 1. Hold the EUI connector adapter so the dust cap opens downwards. 2 3 4 2.
Operating Your Chromatic Dispersion Analyzer Cleaning and Connecting Optical Fibers Cleaning and Connecting Optical Fibers IMPORTANT To ensure maximum power and to avoid erroneous readings: ³ Always clean fiber ends as explained below before inserting them into the port. EXFO is not responsible for damage or errors caused by bad fiber cleaning or handling. ³ Ensure that your patchcord has appropriate connectors. Joining mismatched connectors will damage the ferrules.
Operating Your Chromatic Dispersion Analyzer Cleaning and Connecting Optical Fibers IMPORTANT The FTB-5800 module is particularly sensitive to unclean fibers. Your results can be erroneous if your fiber is dirty. Verify the fiber end with a portable fiber-optic microscope (e.g., EXFO’s FOMS) or fiber inspection probe (e.g., EXFO’s FIP). WARNING Verifying the fiber end WHILE THE SOURCE IS ACTIVE WILL result in permanent eye damage.
Operating Your Chromatic Dispersion Analyzer Selecting the Source Type Selecting the Source Type Different sources can be used for testing with your Chromatic Dispersion Analyzer. The different sources allow you work on either the C-band, the L-band or the C+L-bands. Source Type FLS-5834, FLS-5804, FLS-5803 FLS-5834A Available Bands C, L, C+L C+L Note: If you change the source type, you must perform a new reference measurement. For details, see Performing Reference Measurements on page 28.
Operating Your Chromatic Dispersion Analyzer Verifying the Intensity of the Source Verifying the Intensity of the Source The intensity meters allow you to make sure a source is connected to the other end of the link and that this source corresponds to the band you are testing. RF Intensity Meter indicates... Power too low (Signal is too weak to be measured) Possible causes/solution ³ Source is not active. ³ Source is active but in the wrong bandwidth.
Operating Your Chromatic Dispersion Analyzer Performing Reference Measurements Performing Reference Measurements IMPORTANT To ensure the best possible results, EXFO recommends performing reference measurements for wavelength and for chromatic dispersion. Furthermore, you must perform a wavelength reference BEFORE performing the chromatic dispersion reference. Skipping wavelength reference may lead to inaccurate results. You cannot perform both references in a single step.
Operating Your Chromatic Dispersion Analyzer Performing Reference Measurements To take a wavelength reference: Note: If the application has prompted you for a wavelength reference (after initialization), you will be brought to step 3 of this procedure automatically. 1. Ensure that the fiber is properly connected to the Ref/High Power port. 2. On the Parameters tab, click the Take Reference button.
Operating Your Chromatic Dispersion Analyzer Performing Reference Measurements 3. On the Wavelength tab, select the source band corresponding to the source you intend to use. 4. Once your information is entered, click Take Reference.
Operating Your Chromatic Dispersion Analyzer Performing Reference Measurements To take a chromatic dispersion reference: 1. Ensure that a wavelength reference has been performed. 2. Ensure that the fiber is properly connected to the Ref/High Power port. 3. In the Parameters tab, click the Take Reference button.
Operating Your Chromatic Dispersion Analyzer Performing Reference Measurements 4. On the CD tab, identify the source from which the reference will be taken. In the following dialog box, enter the source model and source serial number in the appropriate boxes. This data will also be displayed on the Results Table tab in the application main window. 5. Once your information is entered, click the Take Reference button.
Operating Your Chromatic Dispersion Analyzer Applying a Chromatic Dispersion Reference Applying a Chromatic Dispersion Reference Chromatic dispersion references can be taken after the results have been acquired. This is useful if you did not have a source and patchcords at hand before performing acquisitions (source and Chromatic Dispersion Analyzer can be many kilometers apart). Once your reference is taken, you can apply it to your results.
Operating Your Chromatic Dispersion Analyzer Creating a File Creating a File Each time you make an acquisition, the results are added to those already displayed under the Application tab. By default, when you save your results, they will be all stored in the same file. If you want your results to be stored in different files, you must explicitly create a new file BEFORE making a new acquisition or set of acquisitions. To create a file: 1. On the button bar, click Open. 2.
Operating Your Chromatic Dispersion Analyzer Measuring Chromatic Dispersion Measuring Chromatic Dispersion You can perform both single and multiple acquisitions on fibers. To perform multiple acquisitions on the same fiber you must define the number of measurements and the interval between them. The average time between acquisitions must be of at least five minutes.
Operating Your Chromatic Dispersion Analyzer Measuring Chromatic Dispersion 4. Set the parameters. ³ Single acquisition: clear the Multiple Acquisitions check box. ³ Multiple acquisitions: select the Multiple Acquisitions box and set the parameters. 5. Click OK to confirm. 6. Verify that the fiber is properly connected and that the source is activated in the right band.
Operating Your Chromatic Dispersion Analyzer Measuring Chromatic Dispersion 7. On the button bar, click Start. The Start button becomes a red Stop button. The application automatically goes to the Results Graph tab. You can move to the Results Table tab to see your results. Note: The application takes some time to evaluate the power of the source. The stronger the signal, the shorter the acquisition. To stop the acquisition before it is complete: Click the Stop button.
Operating Your Chromatic Dispersion Analyzer Saving Your Results Saving Your Results Once your acquisition is done, you must save your results if you intend to use them for further analysis later on. Note: If the file has not been saved yet or if some changes have been made to a saved file, an asterisk appears beside the filename in the title bar. IMPORTANT When the application saves the results, all the acquisitions present under the Acquisition tab will be stored in the same file.
Operating Your Chromatic Dispersion Analyzer Saving Your Results 2. Select the folder in which you want to save your data or create a folder by clicking the New Folder button. 3. In the Filename box, type the name you want to give to your file (if the virtual keyboard is not displayed, select the Filename box again.) The file format is xxx.ExfoCD. 4. Click OK. You know that the file is saved when the asterisk beside the name disappears.
5 Managing Results Your FTB-5800 Chromatic Dispersion Analyzer allows you to work with two types of results: ³ Newly acquired results ³ Results loaded from existing files To view and analyze your results, the application provides: ³ A graph and a table presenting details for a specific acquisition ³ A window giving you an overview of all the available acquisitions You can zoom in on specific areas of the graph or remove points that are too far from the average.
Managing Results Recalling a Saved File Recalling a Saved File It is possible to reload existing files in .exfocd format. These files can also be opened directly from Windows Explorer (the Chromatic Dispersion Analyzer application starts automatically). To open a file from the Chromatic Dispersion Analyzer: 1. On the button bar, click the Open button to recall the desired file. Note: If a keyboard is connected to the FTB-400, you can also use the Ctrl+O shortcut key to open your file. 2.
Managing Results Analyzing Results from the Results Graph Analyzing Results from the Results Graph The application presents a graph containing details about the current acquisition, including the fitted lambda zero value (extrapolated wavelength at which the dispersion equals 0), the dispersion, the RGD curve (illustrating the fitted points) and the measured RGD points. The fitted lambda zero value, the RGD curve and the RGD points can be shown or hidden, according to your needs.
Managing Results Analyzing Results from the Results Graph Even if you have acquired your results with a particular type of data fitting, during your analysis, you may want to apply another type of fit. You should choose the type of fit you want to apply to your results carefully so as to minimize error. Some types of fits such as the Cubic and 5-Term Sellmeier should not be used to extrapolate data.
Managing Results Analyzing Results from the Results Graph To show or hide the fitted lambda zero value: 1. On the button bar, click Setup. 2. Under Graphic Display, select the Show Fitted Lambda Zero Value check box to show the value. OR clear the Show Fitted Lambda Zero Value check box to hide the value. Confirm the changes with OK.
Managing Results Analyzing Results from the Results Graph To show or hide the RGD curves and/or RGD values 1. On the button bar, click Setup. 2. Under Graphic Display, Click the Show RGD Values and/or Show Calculated Curves During Acquisition check boxes to show the corresponding elements. OR Clear the Show RGD Values and/or Show Calculated Curves During Acquisition check boxes to hide the corresponding elements. 3. Click OK.
Managing Results Analyzing Results from the Results Graph To interpret results using a different type of fit: On the Results Graph tab, in the RGD Data Fit list, select the desired type of fit.
Managing Results Analyzing Results from the Results Graph To position the marker: ³ Drag the marker to the point you want to focus on. ³ Use the right and left arrows to move the marker to the desired position. ³ Select the marker and move it with the FTB-400 selection dial.
Managing Results Analyzing Results from the Results Graph To zoom in on results or zoom out: 1. On the Results Graph tab, click the magnifying glass button. 2. Enter the desired range by putting a lower and upper limit value in the fields of your choice. The wavelength, dispersion and RGD will be magnified accordingly. Note: You can only use the zoom function on extrapolated values that are within the 1200 to 1700 nm wavelength acquisition range.
Managing Results Analyzing Results from the Results Graph To revert the zoom factor to its default value: 1. On the Results Graph tab, click the magnifying glass button. 2. Click the Reset Zoom button to reset the graph view so that all the acquisition points are visible.
Managing Results Analyzing Results from the Results Graph To have the zoom reset automatically: 1. On the button bar, click Setup. 2. Under Graphic Display, select the Auto Reset Zoom check box.
Managing Results Analyzing Results from the Results Table Analyzing Results from the Results Table The columns presented on the Results Table tab are detailed below. They show you part of the data you need to know to analyze your results. The content of the table can also be sorted for easier management. For information on acquisition status (pass/fail) 52 ³ The first column indicates if the data in this row is used to calculate the final results.
Managing Results Analyzing Results from the Results Table When applicable, in the dispersion and coefficient of dispersion columns, the acquisition status is indicated by (pass) or (fail). For more information, see Establishing Thresholds on page 56. If you want to lower your RGD’s mean square error rate, you can remove the points with a larger RGD deviation from the graph. This way, they will no longer be taken into account when applying the fit.
Managing Results Keeping Track of Acquisitions To select or deselect points: Select or deselect the corresponding boxes in the first column of the results table. Keeping Track of Acquisitions The application offers a general view of both the current acquisitions and those from a reloaded file. When a problem occurs, such as a fiber break, you may want to delete the corresponding erroneous measurement. This could be useful to avoid distorting results.
Managing Results Keeping Track of Acquisitions To display an overall view of the results: Click the Acquisitions tab. To delete unwanted results: 1. Inthe provided list, select the acquisition to be deleted and click Delete Acquisition. 2. A confirmation message will be displayed. Click Yes to confirm. 3. Repeat steps 1 and 2 for each acquisition you want to delete.
Managing Results Establishing Thresholds Establishing Thresholds You can establish two types of thresholds: the dispersion and slope 0 thresholds. The Dispersion Threshold will be displayed when the fiber you test surpasses the dispersion level you allowed. It is applied to every wavelength and will be displayed in the Results Table tab, where you will have three possible results: ³ if your acquisition did not exceed the specified threshold. ³ if your acquisition exceeded the specified threshold.
Managing Results Establishing Thresholds The Slope 0 Threshold is the slope of the dispersion curve evaluated at the points where the dispersion is null (lambda 0). In the Results Graph tab, you will have four possible results: ³ Pass if the slope at lambda 0 is less than or equal to the threshold. ³ Fail if it is greater than the threshold. ³ Fit if your slope at lambda 0 did not respect FOTP standard 169.
Managing Results Establishing Thresholds To establish your thresholds: 1. On the button bar, click Setup. 2. Set the thresholds as required. ³ If you want to establish a dispersion threshold, select the Dispersion Threshold check box and enter the values in the appropriate boxes. ³ If you want to establish a slope 0 threshold, select the Slope 0 Threshold check box and enter the values in the appropriate boxes. 3. When you are done, click OK.
Managing Results Documenting Results Documenting Results For easier management, you may want to add comments and information about the tests that were performed. It is possible to include general and specific information. General information concerns jobs, receiver and source. Specific information is related to measurements. This information could be included later in reports or in exported ASCII files. To add general information: 1. On the button bar, click Notepad. 2.
Managing Results Documenting Results To add specific information: 1. On the Acquisitions tab, select the acquisition you wish to comment (the row must be highlighted). 2. On the Results Table, fill in the Comments box. The modifications will only be effective if you save them (see Saving Your Results on page 38). If you want to discard the changes, simply answer “No” when the application will prompt you to save the file.
Managing Results Exporting Results and Graphs to Clipboard Exporting Results and Graphs to Clipboard The FTB-5800 Chromatic Dispersion Analyzer offers you the possibility of quickly building your own reports by copying results and graphs to the clipboard. Afterwards, the content of the clipboard can be pasted onto a word-processor document of your choice. Graphs are exported exactly as you see them on the screen (zoom factor and display are kept) and converted to .bmp format.
Managing Results Printing Results Printing Results The Chromatic Dispersion Analyzer allows you to print reports containing test information and results. You can customize the report’s content by selecting the sections, their order of appearance, as well as the acquisitions that will be included. In fact, it is possible to print reports including all the acquisitions listed on the Acquisitions tab or only the current one. To print a report: 1. On the button bar, click Print. 2.
Managing Results Printing Results 4. Select Print All Acquisitions or Print Current Acquisition Only, depending on the type of report you need. 5. If necessary, set the printer parameters by using the Set Up Current Printer button. 6. When you are done, click the OK button to start printing.
6 Exporting CD Analyzer Files with the File Export Tool The File Export tool has been designed to export chromatic dispersion files to specific formats: ³ text files ³ comma-delimited (.csv) files You can also fully customize the contents of the generated files by exporting only the information you need. Starting and Exiting the File Export Tool To start the export tool: In ToolBox, click the Work on Results function tab. Click the Chromatic Dispersion tab and click CD File Export.
Exporting CD Analyzer Files with the File Export Tool Starting and Exiting the File Export Tool The File Export tool main window is displayed. Files to be exported Function tabs Information about the export process To exit the export tool: 66 ³ Click (in the top right corner of the main window). ³ Click the Exit button located at the bottom of the function tabs bar.
Exporting CD Analyzer Files with the File Export Tool Setting Export Parameters Setting Export Parameters Before exporting data in one format to another, you must define: ³ Which information must be exported: You can export general test information (fiber ID, acquisition parameters, source and receiver information, etc.) as well as points from the acquired traces. This is particularly useful if you intend to build your own graphs using Microsoft Excel, for instance.
Exporting CD Analyzer Files with the File Export Tool Setting Export Parameters To set export parameters: 1. If necessary, open the File Export tool (see Starting and Exiting the File Export Tool on page 65). 2. Select the desired conversion type. 3. On the Settings function tab, select all the check boxes corresponding to the information you want to export. Note: If you select Results Table, all points acquired during the test will be exported. 4.
Exporting CD Analyzer Files with the File Export Tool Exporting Chromatic Dispersion Files Exporting Chromatic Dispersion Files Once the export parameters are set, you are now ready to start exporting your files. Files that cannot be exported (e.g., files already open in another application or corrupt files) will be skipped and their export status will change to “Failed”. IMPORTANT To avoid errors during file export, ensure that all the files you intend to use are closed.
Exporting CD Analyzer Files with the File Export Tool Exporting Chromatic Dispersion Files 4. Select the files. 4a. Under Files To Be Exported, click Add. A standard Open dialog box is displayed, allowing you to choose the desired files. Note: You can speed up file selection by choosing several files at the same time. 4b. When you are done, in the dialog box, click Open to transfer the files to the list. Note: You can remove a specific file by selecting it and using Remove.
7 Maintenance To help ensure long, trouble-free operation: ³ Always clean fiber-optic connectors before using them. ³ Keep the unit free of dust. ³ Clean the unit casing and front panel with a cloth slightly dampened with water. ³ Store unit at room temperature in a clean and dry area. Keep the unit out of direct sunlight. ³ Avoid high humidity or significant temperature fluctuations. ³ Avoid unnecessary shocks and vibrations.
Maintenance Cleaning EUI Connectors Cleaning EUI Connectors Regular cleaning of EUI connectors will help maintain optimum performance. There is no need to disassemble the unit. IMPORTANT If any damage occurs to internal connectors, the module casing will have to be opened and a new calibration will be required. To clean EUI connectors: 1. Remove the EUI from the instrument to expose the connector baseplate and ferrule. Turn Pull Push 2. Moisten a 2.
Maintenance Cleaning EUI Connectors Note: Make sure you don’t touch the soft end of the cleaning tip. 6. Clean the ferrule in the connector port as follows: 6a. Deposit one drop of isopropyl alcohol on a lint-free wiping cloth. IMPORTANT Isopropyl alcohol may leave residues if used abundantly or left to evaporate (about 10 seconds). Avoid contact between the tip of the bottle and the wiping cloth, and dry the surface quickly. 6b. Gently wipe the connector and ferrule. 6c.
Maintenance Cleaning Detector Ports Cleaning Detector Ports Regular cleaning of detectors will help maintain measurement accuracy. IMPORTANT Always cover detectors with protective caps when unit is not in use. To clean detector ports: 1. Remove the protective cap and adapter (FOA) from the detector. 2. If the detector is dusty, blow dry with compressed air. 3. Being careful not to touch the soft end of the swab, moisten a cleaning tip with only one drop of isopropyl alcohol.
Maintenance Recalibrating the Unit Recalibrating the Unit Manufacturing and service center calibrations are based on the ISO/IEC 17025 Standard, which states that calibration documents must not contain a recommended calibration interval, unless this has been previously agreed upon with the customer. Validity of specifications depends on operating conditions.
Maintenance Recycling and Disposal (Applies to European Union Only) Recycling and Disposal (Applies to European Union Only) Recycle or dispose of your product (including electric and electronic accessories) properly, in accordance with local regulations. Do not dispose of it in ordinary garbage receptacles. This equipment was sold after August 13, 2005 (as identified by the black rectangle).
8 Troubleshooting Solving Common Problems Fatal Error Consequences Recommended Solution Module temperature is too high for operation. The module will stop functioning. Use the system within the recommended operation temperature.a Module temperature is too low for operation. The module will stop functioning. Use the system within the recommended operation temperature.a There is a critical module The module will stop error. functioning. a. Try restarting the application.
Troubleshooting Solving Common Problems Warning Source power is low. Consequences Recommended Solution Some points will be ³ Check if you have the right grayed out on the graph. input port. ³ Check if the fiber link is damaged. ³ Check for irregularities in the fiber. ³ Use the intensity meter to check the source’s signal. ³ Make sure your fiber link is not too long. The power of the source Some points will be ³ Use the intensity meter to is too high. grayed out on the graph.
Troubleshooting Viewing Online Documentation Viewing Online Documentation An online version of the FTB-5800 Chromatic Dispersion Analyzer user guide is conveniently available at all times from the application. To access the online user guide: Simply click on Help in the function bar. Finding Information on the EXFO Web Site The EXFO Web site provides answers to frequently asked questions (FAQs) regarding the use of your FTB-5800 Chromatic Dispersion Analyzer. To access FAQs: 1. Type http://www.exfo.
Troubleshooting Contacting the Technical Support Group Contacting the Technical Support Group To obtain after-sales service or technical support for this product, contact EXFO at one of the following numbers. The Technical Support Group is available to take your calls from Monday to Friday, 7:30 a.m. to 8:00 p.m. (Eastern Time in North America). Technical Support Group 400 Godin Avenue Quebec (Quebec) G1M 2K2 CANADA 1 866 683-0155 (USA and Canada) Tel.: 1 418 683-5498 Fax: 1 418 683-9224 support@exfo.
Troubleshooting Transportation Transportation Maintain a temperature range within specifications when transporting the unit. Transportation damage can occur from improper handling. The following steps are recommended to minimize the possibility of damage: ³ Pack the unit in its original packing material when shipping. ³ Avoid high humidity or large temperature fluctuations. ³ Keep the unit out of direct sunlight. ³ Avoid unnecessary shocks and vibrations.
9 Warranty General Information EXFO Electro-Optical Engineering Inc. (EXFO) warrants this equipment against defects in material and workmanship for a period of one year from the date of original shipment. EXFO also warrants that this equipment will meet applicable specifications under normal use.
Warranty Liability Liability EXFO shall not be liable for damages resulting from the use of the product, nor shall be responsible for any failure in the performance of other items to which the product is connected or the operation of any system of which the product may be a part. EXFO shall not be liable for damages resulting from improper usage or unauthorized modification of the product, its accompanying accessories and software.
Warranty Service and Repairs Service and Repairs EXFO commits to providing product service and repair for five years following the date of purchase. To send any equipment for service or repair: 1. Call one of EXFO’s authorized service centers (see EXFO Service Centers Worldwide on page 86). Support personnel will determine if the equipment requires service, repair, or calibration. 2.
Warranty EXFO Service Centers Worldwide EXFO Service Centers Worldwide If your product requires servicing, contact your nearest authorized service center. EXFO Headquarters Service Center 400 Godin Avenue Quebec (Quebec) G1M 2K2 CANADA EXFO Europe Service Center Omega Enterprise Park, Electron Way Chandlers Ford, Hampshire S053 4SE ENGLAND EXFO China Service Center/ Beijing OSIC Beijing New Century Hotel Office Tower, Room 1754-1755 No. 6 Southern Capital Gym Road Beijing 100044 P. R.
A Technical Specifications IMPORTANT The following technical specifications can change without notice. The information presented in this section is provided as a reference only. To obtain this product’s most recent technical specifications, visit the EXFO Web site at www.exfo.com.
B Measuring Chromatic Dispersion: Theory EXFO’s Chromatic Dispersion Analyzer applies the phase-shift method, which consists of measuring the phase variation of a sinusoidal intensity modulated signal at a specific wavelength to obtain the relative group delay of a fiber. The derivative of the relative group delay calculated from fitted equations on computed results gives the dispersion, the zero-dispersion wavelength and the dispersion slope.
Measuring Chromatic Dispersion: Theory Using Data Fits to Obtain Dispersion Using Data Fits to Obtain Dispersion This section gives you details about the way EXFO uses the data fits to obtain dispersion. Once group delays are computed, equations are fitted in order to obtain dispersion, dispersion slope and zero-dispersion wavelengths. The dispersion curve of typical singlemode fibers follows certain equations used to interpolate zero-dispersion wavelength and slope.
Measuring Chromatic Dispersion: Theory Using Data Fits to Obtain Dispersion Fiber Type and Wavelength Range Expression for D 2 50/125 τ ( λ ) = A + Bλ + Cλ 50nm ≤ λ ≤ 1450nm –3 D ( λ ) = 2 ( Bλ – Cλ ) 2 62.
Measuring Chromatic Dispersion: Theory Helping You Manage Chromatic Dispersion Helping You Manage Chromatic Dispersion The zero-dispersion wavelength (where dispersion is at zero) corresponds to the wavelength point at which the fiber under test reaches its maximum bandwidth. The slope from this zero-dispersion point indicates how fast dispersion rises as wavelength increases. Key chromatic dispersion parameters are the dispersion zero and the slope at zero dispersion.
Index Index A accessing File Export ................................... 65 accuracy, results .......................................... 28 acquiring multiple traces............................. 35 acquisition, stopping................................... 37 after-sales service ........................................ 80 application exiting ................................................... 12 File Export.............................................. 65 starting, single-module..........................
Index EUI connectors, cleaning ............................. 72 EXFO service centers.................................... 86 EXFO universal interface. see EUI EXFO Web site............................................. 79 exiting application................................. 12, 65 exporting chromatic dispersion files ...................... 65 results.................................................... 61 F FAQs............................................................ 79 fiber ends, cleaning..............
Index P S parameters, printer ..................................... 63 PDF. see online user guide performance, optimum ............................... 28 phase-shift method ....................................... 1 position, module ......................................... 11 printing arranging report presentation ............... 62 setup parameters................................... 63 product identification label................................. 80 specifications ...................................
Index T Z technical specifications ......................... 79, 87 technical support ........................................ 80 temperature for storage.............................. 71 test, adding general information about ...... 59 threshold dispersion .............................................. 56 slope 0................................................... 57 time between acquisitions .......................... 35 title bar .......................................................
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