EXFO FTB-5800 User Manual
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EXFO FTB-5800 User Manual

Chromatic dispersion analyzer
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CHROMATIC DISPERSION
ANALYZER
FTB-5800 for FTB-400
NETWORK TESTING
USER GUIDE

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Summary of Contents for EXFO FTB-5800

  • Page 1 CHROMATIC DISPERSION ANALYZER FTB-5800 for FTB-400 NETWORK TESTING USER GUIDE...
  • Page 2 Engineering Inc. (EXFO). Information provided by EXFO is believed to be accurate and reliable. However, no responsibility is assumed by EXFO for its use nor for any infringements of patents or other rights of third parties that may result from its use.

  • Page 3: Table Of Contents

    Contents Contents Certification Information ......................v 1 Introducing the FTB-5800 Chromatic Dispersion Analyzer ......1 Main Features .........................1 Basic Theory ..........................3 Typical Applications ........................3 Conventions ..........................4 2 Getting Started with Your Chromatic Dispersion Analyzer ....... 5 Inserting and Removing Test Modules ...................5 Starting the Chromatic Dispersion Analyzer Application ............10...
  • Page 4 Recycling and Disposal (Applies to European Union Only) ............76 8 Troubleshooting ..................77 Solving Common Problems ....................77 Viewing Online Documentation ....................79 Finding Information on the EXFO Web Site ................79 Contacting the Technical Support Group ................80 Transportation ........................81 9 Warranty ......................83 General Information ......................83 Liability ..........................84...

  • Page 5: 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.

  • Page 6: Declaration Of Conformity

    Quebec, Quebec Canada G1M 2K2 (418) 683-0211 Equipment Type/Environment: Industrial Scientific Equipment Trade Name/Model No.: FTB-5800 Chromatic Dispersion Analyzer Year of Conformity Assessment: 2002 Standard(s) to which Conformity is Declared: EN 61326: 1997/ A2: Electrical Equipment for Measurement, Control and Laboratory...

  • Page 7: Introducing The Ftb-5800 Chromatic Dispersion Analyzer

    Main Features The FTB-5800 Chromatic Dispersion Analyzer is a reliable solution to chromatic dispersion management. It uses the phase-shift measurement method to measure phase variations at fixed frequencies and combines them relative group delays.
  • Page 8 The FTB-5800 Chromatic Dispersion Analyzer is offered as a compact, portable and field-ready module used in the FTB-400 Universal Test System and combined with the FLS-5800 for optimal test results. The FTB-5800 Chromatic Dispersion Analyzer comes with user-friendly software, which allows you to perform your acquisition, and then view, analyze and save your results easily.

  • Page 9: Basic Theory

    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.

  • Page 10: Conventions

    Introducing the FTB-5800 Chromatic Dispersion Analyzer Conventions Conventions Before using the product described in this manual, you should understand the following conventions: ARNING 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.

  • Page 11: Getting Started With Your Chromatic Dispersion Analyzer

    Getting Started with Your Chromatic Dispersion Analyzer MPORTANT 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 AUTION Never insert or remove a module while the FTB-400 Universal Test...
  • Page 12 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. Place the FTB-400 so that its left panel is facing you. FTB-5800...
  • Page 13 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)
  • Page 14 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. 5. Hold the module by its sides or by the handle (NOT by the connector) and pull it out. FTB-5800...
  • Page 15 Getting Started with Your Chromatic Dispersion Analyzer Inserting and Removing Test Modules AUTION 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. AUTION Failure to reinstall protective covers over empty slots will result in ventilation problems.

  • Page 16: Starting The Chromatic Dispersion Analyzer Application

    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.
  • Page 17 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 parameters panel Source type Fiber Information Intensity panel meters Status bar Button bar Title Bar The title bar is located at the top of the main window.

  • Page 18: Exiting The Application

    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).

  • Page 19: Setting Up Your Chromatic Dispersion Analyzer

    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.

  • Page 20: Setting The Wavelength Step

    Note: The smaller the step you choose, the higher the accuracy of your measurement will be and the longer the acquisition will take. For unknown fiber type or amplified links, EXFO strongly recommends selecting the smallest step possible. To select a predefined wavelength step: On the Parameters tab, use the Step dial.
  • Page 21 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.

  • Page 22: Setting The Averaging Time

    Note: The averaging time displayed on the screen does not take stabilizing time into account. The Estimated Acq. Time field will give you an idea of the overall time your acquisition will take, including the time needed for the system to stabilize, as this time can vary. FTB-5800...

  • Page 23: Specifying The Fiber Under Test

    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.
  • Page 24 However, once in the Results Graph tab, it is possible to interpret your results by selecting another fit. If you know the fiber length, select the Known Fiber Length box and enter the appropriate fiber length in the corresponding box. By default, the value is in kilometers. FTB-5800...
  • Page 25 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.

  • Page 26: Defining The Automatic Fiber Name Format

    If you do not enter any prefix or number, the fiber will be identified with one number only. Note: You can modify the fiber name later, when the acquisitions are complete. For more information, see Documenting Results on page 59. Note: You cannot define the automatic fiber name format in offline mode. FTB-5800...
  • Page 27 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. Static part Variable part (incremented) Number of digits composing the Value that will be added to the fiber identification fiber identification number...

  • Page 29: Operating Your Chromatic Dispersion Analyzer

    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...

  • Page 30: Cleaning And Connecting Optical Fibers

    To ensure maximum power and to avoid erroneous readings: 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. Ensure that your patchcord has appropriate connectors. Joining mismatched connectors will damage the ferrules.
  • Page 31 Operating Your Chromatic Dispersion Analyzer Cleaning and Connecting Optical Fibers MPORTANT 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).

  • Page 32: Selecting The Source Type

    Note: If you change the source type, you must perform a new reference measurement. For details, see Performing Reference Measurements on page 28. To select the source type: On the Parameters tab, select the desired source in the corresponding list. FTB-5800...

  • Page 33: Verifying The Intensity Of The Source

    (Signal is too Use an attenuator with a null dispersion to take your strong to be measurement. For more information, please contact EXFO. measured) To verify the intensity of the source: On the Parameters tab, consult the RF Intensity Meters indicators. Green check marks indicate an appropriate intensity.

  • Page 34: Performing Reference Measurements

    Operating Your Chromatic Dispersion Analyzer Performing Reference Measurements Performing Reference Measurements MPORTANT 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.
  • Page 35 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.
  • Page 36 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. FTB-5800...
  • Page 37 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. Chromatic Dispersion Analyzer...
  • Page 38 Results Table tab in the application main window. 5. Once your information is entered, click the Take Reference button. Note: There is no reference setup, so the reference will be valid for all kinds of tests using various parameters. FTB-5800...

  • Page 39: Applying A Chromatic Dispersion Reference

    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).

  • Page 40: Creating A File

    BEFORE making a new acquisition or set of acquisitions. To create a file: 1. On the button bar, click Open. 2. In the Open File dialog box, click New File. You are now ready to perform acquisitions. FTB-5800...

  • Page 41: Measuring Chromatic Dispersion

    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.
  • Page 42 Single acquisition: clear the Multiple Acquisitions check box. 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. FTB-5800...
  • Page 43 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.

  • Page 44: Saving Your Results

    To save your results: 1. On the button bar, click the Save button. Note: If a keyboard is connected to the FTB-400, you can also use the Ctrl+S shortcut key to save your results. FTB-5800...
  • Page 45 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.

  • Page 47: Managing Results

    Managing Results Your FTB-5800 Chromatic Dispersion Analyzer allows you to work with two types of results: Newly acquired results Results loaded from existing files To view and analyze your results, the application provides: A graph and a table presenting details for a specific acquisition...

  • Page 48: Recalling A Saved File

    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. Select the file and click OK. FTB-5800...

  • Page 49: Analyzing Results From The Results Graph

    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.
  • Page 50 In some cases, it is useful to deactivate the automatic zoom reset. For example, if you are analyzing a file containing many acquisitions, it allows you to define the zoom once and then apply it to all traces. Otherwise, you would have to define the zoom for each trace. FTB-5800...
  • Page 51 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.
  • Page 52 Click the Show RGD Values and/or Show Calculated Curves During Acquisition check boxes to show the corresponding elements. Clear the Show RGD Values and/or Show Calculated Curves During Acquisition check boxes to hide the corresponding elements. 3. Click OK. FTB-5800...
  • Page 53 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. Chromatic Dispersion Analyzer...
  • Page 54 To position the marker: Drag the marker to the point you want to focus on. Use the right and left arrows to move the marker to the desired position. Select the marker and move it with the FTB-400 selection dial. Marker FTB-5800...
  • Page 55 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.
  • Page 56 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. FTB-5800...
  • Page 57 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. Chromatic Dispersion Analyzer...

  • Page 58: Analyzing Results From The Results Table

    RGD. RGD Deviation: corresponds to the absolute value between the RGD and the Fitted RGD. Dispersion (ps/nm): Dispersion value when fiber length is unknown. Dispersion (ps/nm-km): Coefficient of dispersion when fiber length is known. FTB-5800...
  • Page 59 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.

  • Page 60: Keeping Track Of Acquisitions

    The removal will only be effective if you save changes (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. FTB-5800...
  • Page 61 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.

  • Page 62: Establishing Thresholds

    --- if there are not enough points to calculate the fit or for the dispersion per kilometer if the fiber length is unknown. Note: Symbols are only displayed if you have selected a threshold. FTB-5800...
  • Page 63 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: Pass if the slope at lambda 0 is less than or equal to the threshold. Fail if it is greater than the threshold.
  • Page 64 Dispersion Threshold check box and enter the values in the appropriate boxes. 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. FTB-5800...

  • Page 65: Documenting Results

    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.
  • Page 66 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. FTB-5800...

  • Page 67: Exporting Results And Graphs To Clipboard

    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.

  • Page 68: Printing Results

    3. If necessary, rearrange the order of the sections in the report: 3a. Select the section you want to move (ensure that the corresponding line is highlighted). 3b. Click the Move Up and Move Down buttons. 3c. Repeat steps 3a and 3b for each section you want to move. FTB-5800...
  • Page 69 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. Chromatic Dispersion Analyzer...

  • Page 71: Exporting Cd Analyzer Files With The File Export Tool

    Exporting CD Analyzer Files with the File Export Tool The File Export tool has been designed to export chromatic dispersion files to specific formats: text files comma-delimited (.csv) files You can also fully customize the contents of the generated files by exporting only the information you need.
  • Page 72 Files to be exported Function tabs Information about the export process To exit the export tool: Click (in the top right corner of the main window). Click the Exit button located at the bottom of the function tabs bar. FTB-5800...

  • Page 73: Setting Export Parameters

    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: 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.
  • Page 74 Note: If you select Results Table, all points acquired during the test will be exported. 4. Under Export Folder, click Browse to specify in which folder the exported files will be stored. FTB-5800...

  • Page 75: Exporting Chromatic Dispersion Files

    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”.
  • Page 76 Note: You can remove a specific file by selecting it and using Remove. If you want to quickly empty the list, choose Remove All. 5. Under Export Control, start the export process using the Export File(s) button. Successful export Unsuccessful export FTB-5800...

  • Page 77: Maintenance

    Maintenance To help ensure long, trouble-free operation: Always clean fiber-optic connectors before using them. Keep the unit free of dust. Clean the unit casing and front panel with a cloth slightly dampened with water. Store unit at room temperature in a clean and dry area. Keep the unit out of direct sunlight.

  • Page 78: Cleaning Eui Connectors

    3. Slowly insert the cleaning tip into the EUI adapter until it comes out on the other side (a slow clockwise rotating movement may help). 4. Gently turn the cleaning tip one full turn, then continue to turn as you withdraw it. 5. Repeat steps 3 to 4 with a dry cleaning tip. FTB-5800...
  • Page 79 6d. Verify connector surface with a portable fiber-optic microscope (e.g., EXFO’s FOMS) or fiber inspection probe (e.g., EXFO’s FIP). ARNING Verifying the surface of the connector WHILE THE UNIT IS ACTIVE WILL result in permanent eye damage.

  • Page 80: Cleaning Detector Ports

    4. While applying light pressure (to avoid breaking the detector window), gently rotate the cleaning tip on the detector window. 5. Repeat step 4 with a dry cleaning tip or blow dry with compressed air. 6. Discard the cleaning tips after one use. FTB-5800...

  • Page 81: Recalibrating The Unit

    You should determine the adequate calibration interval for your unit according to your accuracy requirements. Under normal use, EXFO recommends calibrating your unit every year. Chromatic Dispersion Analyzer...

  • Page 82: Recycling And Disposal (Applies To European Union Only)

    This equipment was sold after August 13, 2005 (as identified by the black rectangle). Unless otherwise noted in a separate agreement between EXFO and a customer, distributor or commercial partner, EXFO will cover costs related to the collection, treatment, recovery and disposal of...

  • Page 83: Troubleshooting

    There is a critical module The module will stop Try restarting the application. error. functioning. If the problem persists, contact EXFO. See Technical Specifications on page 87. Operating Error Consequences Recommended Solution Source power is too high. The reference or...
  • Page 84 Use the system within the very high. measurements can be recommended operation affected. temperature. Module temperature is The accuracy of your Use the system within the very low. measurements can be recommended operation affected. temperature. See Technical Specifications on page 87. FTB-5800...

  • Page 85: Viewing Online Documentation

    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.

  • Page 86: 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.

  • Page 87: Transportation

    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: Pack the unit in its original packing material when shipping. Avoid high humidity or large temperature fluctuations.

  • Page 89: Warranty

    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. During the warranty period, EXFO will, at its discretion, repair, replace,...

  • Page 90: Liability

    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.

  • Page 91: Service And Repairs

    5. Return the equipment, prepaid, to the address given to you by support personnel. Be sure to write the RMA number on the shipping slip. EXFO will refuse and return any package that does not bear an RMA number.

  • Page 92: Exfo Service Centers Worldwide

    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 1 866 683-0155 (USA and Canada) Quebec (Quebec) G1M 2K2 Tel.: 1 418 683-5498...

  • Page 93: A Technical Specifications

    MPORTANT 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. SPECIFICATIONS Model FTB-5800 Wavelength range (nm)

  • Page 95: B Measuring Chromatic Dispersion: Theory

    Method Behind the Chromatic Dispersion Analyzer In EXFO’s Chromatic Dispersion Analyzer, the light source is a broadband source, which is intensity modulated at a high frequency. This light is injected into the fiber under test and the modulated light travels along the fiber.

  • Page 96: Using Data Fits To Obtain Dispersion

    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.
  • Page 97 Measuring Chromatic Dispersion: Theory Using Data Fits to Obtain Dispersion Fiber Type Expression for D and Wavelength Range 50/125 2 – τ λ ( ) Bλ Cλ ≤ λ ≤ 50nm 1450nm 3 – D λ ( ) 2 Bλ Cλ –...

  • Page 98: Helping You Manage Chromatic Dispersion

    The effects of chromatic dispersion decrease with a reduction in the absolute value of the fiber chromatic dispersion or with dispersion compensation. FTB-5800...

  • Page 99: Index

    Index Index chromatic dispersion definition ..........3 accessing File Export ........65 factors............ 92 accuracy, results .......... 28 managing ..........92 acquiring multiple traces......35 measuring..........37 acquisition, stopping........37 reference..........28 after-sales service ........80 taking a reference ........31 application cleaning exiting ...........
  • Page 100 Index EUI connectors, cleaning ......72 intensity meter ..........27 EXFO service centers........86 intensity of the source ......... 27 EXFO universal interface. see EUI interval between acquisitions ...... 35 EXFO Web site..........79 exiting application......... 12, 65 exporting label, identification........80 chromatic dispersion files ......
  • Page 101 ......15 Ready, module status ........12 using preset steps ........14 recalibration ..........75 shipping to EXFO......... 85 reference slot number ..........11 applying, after acquisition ..... 33 software. see application chromatic dispersion ......31 source frequence ..........
  • Page 102 ........... 84 exclusions ..........84 general ..........83 liability........... 84 null and void.......... 83 wavelength available bands........13 lower-range limit ........13 reference ..........28 step ............14 upper-range limit........13 wavelength scale......... 43 wavelength, taking a reference ....29 FTB-5800...
  • Page 103 EXFO ASIA-PACIFIC 151 Chin Swee Road SINGAPORE 169876 #03-29, Manhattan House Tel.: +65 6333 8241 · Fax: +65 6333 8242 TOLL-FREE (USA and Canada) 1 800 663-3936 © 2007 EXFO Electro-Optical Engineering Inc. All rights reserved. Printed in Canada (2007-08)

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