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Managing Results

Chromatic Dispersion Analyzer

43

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.

The graph is based on three scales:

³

Dispersion scale

: displays results in ps/nm-km or in ps/nm if the fiber

length is not known or not entered.

³

Relative Group Delay (RGD)

:

displays results in ps.

³

Wavelength

: displays the wavelength in nm.

Relative Group
Delay scale

Dispersion

scale

Wavelength

scale

Dispersion
curve

Measured

data point

RGD curve

Data fit type

Marker

Zoom
parameters

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Содержание FTB-400

Страница 1: ...USER GUIDE CHROMATIC DISPERSION ANALYZER FTB 5800 for FTB 400 NETWORK TESTING...

Страница 2: ...parties that may result from its use No license is granted by implication or otherwise under any patent rights of EXFO EXFO s Commerce And Government Entities CAGE code under the North Atlantic Treat...

Страница 3: ...6 Specifying the Fiber Under Test 17 Defining the Automatic Fiber Name Format 20 4 Operating Your Chromatic Dispersion Analyzer 23 Installing the EXFO Universal Interface EUI 23 Cleaning and Connectin...

Страница 4: ...y 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...

Страница 5: ...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 pres...

Страница 6: ...Assessment 2002 Standard s to which Conformity is Declared EN 61326 1997 A2 2001 Electrical Equipment for Measurement Control and Laboratory Use EMC Requirements EN 55022 1998 A1 2000 Limits and meth...

Страница 7: ...ors 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 f...

Страница 8: ...you to take measurements even though the source is kilometers away without interfering with the accuracy of results The FTB 5800 Chromatic Dispersion Analyzer is offered as a compact portable and fie...

Страница 9: ...rates mean pulses are closely spaced in time and have less room to spread before they overlap High channel count increases the difficulty in correcting dispersion since each channel experiences differ...

Страница 10: ...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 Do not proceed unl...

Страница 11: ...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 CAU...

Страница 12: ...he 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 facin...

Страница 13: ...ules 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 When you turn on the unit the startup...

Страница 14: ...it 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 4 Place the FTB 400 so that t...

Страница 15: ...ng Test Modules 6 Cover empty slots with the supplied protective covers CAUTION Pulling out a module by a connector could seriously damage both the module and connector Always pull out a module by its...

Страница 16: ...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 Analyz...

Страница 17: ...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 The module position is identified as follows Note On some 7 slot ba...

Страница 18: ...FTB 400 Universal Test System user guide Exiting the Application Closing any application that is not currently being used is a good way to free up system memory To close the application from the main...

Страница 19: ...his option could be useful to perform acquisitions in a specific area of a band or between two bands To select a predefined wavelength range On the Parameters tab use the Range dial To set the wavelen...

Страница 20: ...cted 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 measu...

Страница 21: ...ab 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 Moreover the final measurement point may not cor...

Страница 22: ...acy of your results Beyond a certain time limit however the accuracy you gain will be insignificant To select a predefined averaging time On the Parameters tab use the Averaging Time dial To set avera...

Страница 23: ...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 Unknown fiber length resul...

Страница 24: ...t Unknown Fiber Type The application will designate a default fit according to the fiber type it will be marked by an asterisk to indicate that it is a default value If necessary in the RGD Data Fit l...

Страница 25: ...alyzer 19 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 un...

Страница 26: ...opportunity to use the same acquisition fiber name Note The number you can enter will depend on the number of digits you have specified For example if you set two digits the maximum you can enter is...

Страница 27: ...To define the fiber name format 1 On the button bar click Setup 2 Under Autonaming set the various parameters according to your needs Number of digits composing the fiber identification number Value t...

Страница 28: ......

Страница 29: ...that it is for APC type connectors To install an EUI connector adapter onto the EUI baseplate 1 Hold the EUI connector adapter so the dust cap opens downwards 2 Close the dust cap in order to hold th...

Страница 30: ...is fully fitted into the port s corresponding notch 3 Push the connector in so that the fiber optic cable is firmly in place thus ensuring adequate contact If your connector features a screwsleeve tig...

Страница 31: ...he 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...

Страница 32: ...fferent sources allow you work on either the C band the L band or the C L bands Note If you change the source type you must perform a new reference measurement For details see Performing Reference Mea...

Страница 33: ...intensity is respectively too low or too high You can also check DC intensity from the DC Intensity Meter RF Intensity Meter indicates Possible causes solution Power too low Signal is too weak to be...

Страница 34: ...elength Before each test session and every time the application recommends it Adjusts the source wavelength precisely The application will advise you to take a wavelength reference whenever the need a...

Страница 35: ...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...

Страница 36: ...atic Dispersion Analyzer 30 FTB 5800 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 c...

Страница 37: ...lyzer 31 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 Hig...

Страница 38: ...n 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...

Страница 39: ...romatic Dispersion Analyzer can be many kilometers apart Once your reference is taken you can apply it to your results The patchcord and analyzer dispersion will be substracted from your results For m...

Страница 40: ...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 ma...

Страница 41: ...isition time If you stop an acquisition before it is complete the results acquired until then will be displayed However in some cases a minimum number of points must be acquired for the application to...

Страница 42: ...on 4 Set the parameters 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 th...

Страница 43: ...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 sou...

Страница 44: ...ng a new file or exiting 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 IMP...

Страница 45: ...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 Filena...

Страница 46: ......

Страница 47: ...s the application provides A graph and a table presenting details for a specific acquisition A window giving you an overview of all the available acquisitions You can zoom in on specific areas of the...

Страница 48: ...ed 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...

Страница 49: ...lustrating 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 The graph is based on three scales...

Страница 50: ...t The Chromatic Dispersion Analyzer also provides you with tools to help you focus on certain data in the graph You can set the marker to a specific point of the graph to view the results related to t...

Страница 51: ...ults 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 F...

Страница 52: ...es 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 R...

Страница 53: ...sults Chromatic Dispersion Analyzer 47 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...

Страница 54: ...ults from the Results Graph 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...

Страница 55: ...the zoom function on extrapolated values that are within the 1200 to 1700 nm wavelength acquisition range Extrapolated values are representative of the selected fit and might not represent the true b...

Страница 56: ...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...

Страница 57: ...esults Chromatic Dispersion Analyzer 51 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...

Страница 58: ...ass fail The first column indicates if the data in this row is used to calculate the final results Wavelength indicates the wavelength at which the dispersion has been calculated RGD corresponds to th...

Страница 59: ...e points with a larger RGD deviation from the graph This way they will no longer be taken into account when applying the fit As soon as you remove one point the RGD fitted RGD RGD deviation dispersion...

Страница 60: ...eneral 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 use...

Страница 61: ...verall 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 b...

Страница 62: ...rsion 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 if your acquisition did not exceed the specified thr...

Страница 63: ...e 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 Fit if your slope at lambda 0 did...

Страница 64: ...he thresholds as required If you want to establish a dispersion threshold select the Dispersion Threshold check box and enter the values in the appropriate boxes If you want to establish a slope 0 thr...

Страница 65: ...ormed 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 include...

Страница 66: ...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 pag...

Страница 67: ...xporting CD Analyzer Files with the File Export Tool on page 65 To export the results table to the clipboard 1 On the Results Table tab ensure that all the points you want to export are selected the b...

Страница 68: ...cquisitions listed on the Acquisitions tab or only the current one To print a report 1 On the button bar click Print 2 Specify which sections must appear in the report by selecting and clearing the co...

Страница 69: ...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...

Страница 70: ......

Страница 71: ...rsion 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 Starting and Exiting th...

Страница 72: ...ng the File Export Tool The File Export tool main window is displayed 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 functi...

Страница 73: ...tion 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 E...

Страница 74: ...nd 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 yo...

Страница 75: ...lready open in another application or corrupt files will be skipped and their export status will change to Failed To export chromatic dispersion files 1 If necessary start the export tool see Starting...

Страница 76: ...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 remo...

Страница 77: ...e unit at room temperature in a clean and dry area Keep the unit out of direct sunlight Avoid high humidity or significant temperature fluctuations Avoid unnecessary shocks and vibrations If any liqui...

Страница 78: ...cleaning tip with one drop of isopropyl alcohol alcohol may leave traces if used abundantly 3 Slowly insert the cleaning tip into the EUI adapter until it comes out on the other side a slow clockwise...

Страница 79: ...ector and ferrule are perfectly dry 6d Verify connector surface with a portable fiber optic microscope e g EXFO s FOMS or fiber inspection probe e g EXFO s FIP 7 Put the EUI back onto the instrument p...

Страница 80: ...soft end of the swab moisten a cleaning tip with only one drop of isopropyl alcohol 4 While applying light pressure to avoid breaking the detector window gently rotate the cleaning tip on the detecto...

Страница 81: ...on interval unless this has been previously agreed upon with the customer Validity of specifications depends on operating conditions For example the calibration validity period can be longer or shorte...

Страница 82: ...ropean Union member state with legislation regarding Directive 2002 96 EC Except for reasons of safety or environmental benefit equipment manufactured by EXFO under its brand name is generally designe...

Страница 83: ...a critical module error The module will stop functioning Try restarting the application If the problem persists contact EXFO Operating Error Consequences Recommended Solution Source power is too high...

Страница 84: ...e your fiber link is not too long The power of the source is too high Some points will be grayed out on the graph Use the intensity meter to check the source signal Check for irregularities in the fib...

Страница 85: ...lp 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 T...

Страница 86: ...n Time in North America To accelerate the process please have information such as the name and the serial number see the product identification label an example is shown below as well as a description...

Страница 87: ...sporting 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 s...

Страница 88: ......

Страница 89: ...of calibration during the warranty period and found to meet all published specifications EXFO will charge standard calibration fees THIS WARRANTY IS IN LIEU OF ALL OTHER WARRANTIES EXPRESSED IMPLIED O...

Страница 90: ...of its products at any time without incurring obligation to make any changes whatsoever on units purchased Accessories including but not limited to fuses pilot lamps batteries and universal interfaces...

Страница 91: ...nd the conditions under which it was observed 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...

Страница 92: ...USA and Canada Tel 1 418 683 5498 Fax 1 418 683 9224 quebec service exfo com EXFO Europe Service Center Omega Enterprise Park Electron Way Chandlers Ford Hampshire S053 4SE ENGLAND Tel 44 2380 246810...

Страница 93: ...nm 0 04 0 2 1 1 Zero dispersion wavelength 0 repeatability d nm 0 1 0 14 0 8 Dispersion slope repeatability 0 d 0 03 0 05 0 25 Minimum fiber length km 1 Maximum fiber length km e 5400 Measurement time...

Страница 94: ......

Страница 95: ...tensity modulation propagates at a speed that depends on wavelength and polarization Values are obtained for the differences in travel time between modulation at different wavelengths The higher the n...

Страница 96: ...llows certain equations used to interpolate zero dispersion wavelength and slope The following table graph shows the equations applied to singlemode fibers in specific wavelength ranges Fiber Type and...

Страница 97: ...extrapolating because the fit may curve away from the true results beyond fitted points The same warning applies to the cubic fit The lambda log lambda fit is applicable to dispersion shifted fibers...

Страница 98: ...w fast dispersion rises as wavelength increases Key chromatic dispersion parameters are the dispersion zero and the slope at zero dispersion Getting precise chromatic dispersion parameters helps you c...

Страница 99: ...t hazard 4 CD analyzer internal design of 89 certification information v choosing the right wavelength step 15 chromatic dispersion definition 3 factors 92 managing 92 measuring 37 reference 28 taking...

Страница 100: ...ic 91 equations 90 lambda log lambda 91 linear 91 format file 65 front panel cleaning 71 H help see online user guide I identification label 80 identification slot 11 inserting a module 5 intensity me...

Страница 101: ...t 44 documenting 59 graph 43 viewing with external application 61 zooming 49 return merchandise authorization RMA 85 S safety caution 4 conventions 4 warning 4 saved file opening 42 saving results 38...

Страница 102: ...transportation requirements 71 81 U unit recalibration 75 user guide see online user guide V verifying source bandwidth 27 source connection 27 source power 27 W warranty certification 84 exclusions 8...

Страница 103: ...683 0211 Fax 1 418 683 2170 EXFO AMERICA 3701 Plano Parkway Suite 160 Plano TX 75075 USA Tel 1 972 907 1505 Fax 1 972 836 0164 EXFO EUROPE Omega Enterprise Park Electron Way Chandlers Ford Hampshire...

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