EXFO FTB-7000 Series Скачать руководство пользователя страница 213 | Manualshive

Страница: 213 / 339

EXFO FTB-7000 Series Скачать руководство пользователя страница 213

Analyzing Traces with the Bidirectional Analysis Application

OTDR

199

Creating Bidirectional Measurement Files

When two traces are opened in the bidirectional analysis application, the
span end of the B->A trace is aligned with the span start of the A->B trace.

If the application cannot match the traces perfectly, error or warning
messages will appear. A message will be displayed if there are
inconsistencies in the events table, wavelength, index of refraction, helix
factor, or Rayleigh backscatter coefficient.

Note:

The A->B and B

-

>A traces are displayed in full view mode (1:1 zoom

factor).

«
...
211
212
213
214
215
...
»

Содержание FTB-7000 Series

Страница 1: ...User Guide OTDR for FTB 200 v2 FTB 7000 Series ...

Страница 2: ...r other rights of third 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 Treaty Organization NATO is 0L8C3 The information contained in this publication is subject to change without notice Trademarks EXFO s trademarks have been identified as such However ...

Страница 3: ...le Applications 19 Timer 20 4 Preparing Your OTDR for a Test 21 Installing the EXFO Universal Interface EUI 21 Cleaning and Connecting Optical Fibers 22 Naming Trace Files Automatically 24 Enabling or Disabling the First Connector Check 28 Setting Macrobend Parameters 29 Launch Conditions for Multimode Measurements 31 5 Testing Fibers in Auto Mode 33 6 Testing Fibers in Advanced Mode 37 Setting th...

Страница 4: ...Disabling the Confirmation of Fault Finder File Name 82 Enabling or Disabling the Storage Feature 84 Enabling or Disabling the First Connector Check for Fault Finder 85 Enabling or Disabling the Touchscreen Keyboard 87 Setting Trace Display Parameters 88 Selecting the Distance Units 90 9 Customizing Your OTDR 93 Selecting the Default File Format 93 Enabling or Disabling File Name Confirmation 94 S...

Страница 5: ...enuation of Fiber Sections 146 Setting the Analysis Detection Thresholds 148 Analyzing or Reanalyzing a Trace 151 Analyzing the Fiber on a Specific Fiber Span 153 Enabling or Disabling the Detection of Reflective Ends of Fiber 154 Swapping Traces 158 Opening Trace Files 159 11 Analyzing the Results Manually 163 Selecting the Attenuation and Loss Values that Will Be Displayed 163 Using Markers 165 ...

Страница 6: ...of Unidirectional Traces 217 Using Zoom Controls 221 Using Markers to Edit Events 225 Inserting Events 227 Modifying Events 231 Deleting Events 235 Changing the Attenuation of Fiber Sections 237 Setting General Parameters 240 Customizing the Events Table 243 Saving the Span Start and Span End Information 246 Setting Pass Fail Thresholds 247 Modifying Trace Analysis Settings 252 Saving Traces 257 E...

Страница 7: ... Centers Worldwide 290 A Technical Specifications 291 B Description of Event Types 297 Span Start 298 Span End 298 Short Fibers 298 Continuous Fiber 299 End of Analysis 300 Non Reflective Event 301 Reflective Event 302 Positive Event 303 Launch Level 304 Fiber Section 305 Merged Event 306 Echo 312 Reflective Event Possible Echo 313 Index 315 ...

Страница 8: ...nic 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 This unit has undergone extensive testing according to the European Union Directive and Standards IMPORTANT Use of shielded remote I O cables with properly grounded shields and metal connectors is recommend...

Страница 9: ...r Measurement Control and Laboratory Use Part 1 General Requirements EN 61326 1 2006 Electrical Equipment for Measurement Control and Laboratory Use EMC Requirements Part 1 General requirements EN 60825 1 2007 Edition 2 0 Safety of laser products Part 1 Equipment classification requirements and user s guide EN 55022 2006 A1 2007 Information technology equipment Radio disturbance characteristics Li...

Страница 10: ...t for Measurement Control and Laboratory Use Part 1 General Requirements EN 61326 1 2006 Electrical Equipment for Measurement Control and Laboratory Use EMC Requirements Part 1 General requirements EN 60825 1 2007 Edition 2 0 Safety of laser products Part 1 Equipment classification requirements and user s guide EN 55022 2006 A1 2007 Information technology equipment Radio disturbance characteristic...

Страница 11: ...Measurement Control and Laboratory Use Part 1 General Requirements EN 61326 1 2006 Electrical Equipment for Measurement Control and Laboratory Use EMC Requirements Part 1 General requirements EN 60825 1 2007 Edition 2 0 Safety of laser products Part 1 Equipment classification requirements and user s guide EN 55022 2006 A1 2007 Information technology equipment Radio disturbance characteristics Limi...

Страница 12: ...ent for Measurement Control and Laboratory Use Part 1 General Requirements EN 61326 1 2006 Electrical Equipment for Measurement Control and Laboratory Use EMC Requirements Part 1 General requirements EN 60825 1 2007 Edition 2 0 Safety of laser products Part 1 Equipment classification requirements and user s guide EN 55022 2006 A1 2007 Information technology equipment Radio disturbance characterist...

Страница 13: ...or Measurement Control and Laboratory Use Part 1 General Requirements EN 61326 1 2006 Electrical Equipment for Measurement Control and Laboratory Use EMC Requirements Part 1 General requirements EN 60825 1 2007 Edition 2 0 Safety of laser products Part 1 Equipment classification requirements and user s guide EN 55022 2006 A1 2007 Information technology equipment Radio disturbance characteristics L...

Страница 14: ......

Страница 15: ... time domain reflectometer OTDR provides an inside view of the fiber and can calculate fiber length attenuation breaks total return loss and splice connector and total losses SM MM OTDR FTB 7200D SM MM LIVE Handle Visual fault locator VFL port optional OTDR port singlemode OTDR port multimode Singlemode and multimode models Singlemode and singlemode live models SM OTDR FTB 7300E SM SM OTDR port fo...

Страница 16: ...Introducing the Optical Time Domain Reflectometer 2 FTB 7000 Series OTDR OTDR port singlemode or multimode Other models Handle Visual fault locator VFL port optional ...

Страница 17: ...sive dynamic range with short dead zones Performs quick acquisitions with low noise levels to enable accurate low loss splice location Acquires OTDR traces made of up to 256 000 points that provide a sampling resolution as fine as 4 cm Includes a light source and can include an optional visual fault locator ...

Страница 18: ...automatically copied to new acquisitions Fault Finder Rapidly locates fiber ends and displays the length of the fiber under test This allows you to perform quick tests without having to set all the acquisition parameters Optional Software Packages An optional software package is offered with the application With this package you can find macrobends view the related information The software package...

Страница 19: ...inglemode traces only to average loss results for each event Available OTDR Models A wide variety of multimode and singlemode OTDR models is offered at several wavelengths to cover all fiber applications from long haul or WDM networks to metropolitan networks OTDR Models Description Singlemode FTB 7200D B 1310 nm and 1550 nm 35 dB dynamic range and 1 m event dead zone useful to locate closely spac...

Страница 20: ...glemode and singlemode live SM Live FTB 7300E XXXB Optimized for metro network installation and troubleshooting access and FTTx test applications end to end links and inside plant testing Test through splitter for FTTH PON characterization Live fiber out of band testing with filtered SM Live port at 1625 nm or 1650 nm Attenuation and event dead zone of respectively 4 m and 0 8 m 38 dB dynamic rang...

Страница 21: ...ata points while sampling a single trace Suitable for long range applications and recommended when measuring time is a key factor Singlemode FTB 7600E XXXXB Up to 50 dB dynamic range on NZDSF with a 20 μs pulse Event dead zone of 1 5 m and attenuation dead zone of 5 m with a 5 ns pulse for high resolution Acquires up to 256 000 data points while sampling a single trace Suitable for characterizatio...

Страница 22: ...splices bends and faults An OTDR then detects and analyzes the backscattered signals The signal strength is measured for specific intervals of time and is used to characterize events The OTDR calculates distances as follows where c speed of light in a vacuum 2 998 x 108 m s t time delay from the launch of the pulse to the reception of the pulse n index of refraction of the fiber under test as spec...

Страница 23: ...ard the transmitter is called backscattering Fresnel reflections occur when the light traveling down the fiber encounters abrupt changes in material density that may occur at connections or breaks where an air gap exists A very large quantity of light is reflected as compared with the Rayleigh scattering The strength of the reflection depends on the degree of change in the index of refraction When...

Страница 24: ...ry 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 unless you understand and meet the required conditions CAUTION Indicates a potentially hazardous situation which if not avoided may result in component damage Do not proceed unless you understand and ...

Страница 25: ...t may be hazardous if you use optics within a diverging or collimated beam Do not view directly with optical instruments WARNING Do not install or terminate fibers while a light source is active Never look directly into a live fiber and ensure that your eyes are protected at all times WARNING Use of controls adjustments and procedures for operation and maintenance other than those specified herein...

Страница 26: ... Information Models with VFL Your instrument is a Class 3R laser product in compliance with standards IEC 60825 1 and 21 CFR 1040 10 It is potentially harmful in direct intrabeam viewing The following label s indicate that the product contains a Class 3R source Affixed to module s side panel ...

Страница 27: ...hile the FTB 200 v2 Compact Modular Platform is turned on This will result in immediate and irreparable damage to both the module and unit WARNING When the laser safety LED is flashing at least one of your modules is emitting an optical signal Please check all modules as it might not be the one you are currently using ...

Страница 28: ...ed with Your OTDR 14 FTB 7000 Series Inserting and Removing Test Modules To insert a module into the FTB 200 v2 Compact Modular Platform 1 Turn off your unit 2 Position the unit so that its front panel is facing you ...

Страница 29: ...at the retaining screw hole is at the left of the connector pins 4 Insert the protruding edges of the module into the grooves of the unit s module slot 5 Push the module all the way to the bottom of the slot until the retaining screw makes contact with the unit casing 6 Place the unit so that its bottom panel is facing you ...

Страница 30: ...sure to the module lift the mobile part of the retaining screw and use it to 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 sequence will automatically detect the module Turn retaining screws clockwise Bottom panel ...

Страница 31: ... 2 Position the unit so that the bottom panel is facing you 3 Lift the mobile part of the retaining screw and use it to turn the retaining screw counterclockwise until it stops The module will be slowly released from the slot 4 Place the FTB 200 v2 Compact Modular Platform so that the top panel is facing you Turn retaining screws counterclockwise Bottom panel ...

Страница 32: ...dules 5 Hold the module by its sides or by the handle NOT by the connector and pull it out 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 casing ...

Страница 33: ...r dedicated applications in Compact ToolBox To start a module application 1 From Compact ToolBox select the module to use It will turn blue to indicate that it is highlighted 2 Under Applications select an application then press Start To start the Power Meter or Probe application From Main Menu press Power Meter or Probe ...

Страница 34: ...elow contains all the commands required to control the OTDR Timer Once the acquisition has begun a timer is displayed on the right hand side of the screen indicating the remaining time until the next acquisition Data display Function tabs Button bar ...

Страница 35: ... 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 the connector adapter more firmly 3 Insert the connector adapter into the baseplate 4 While pushing firmly turn the connector adapter clockwise on the baseplate to lock it in place Bare metal or blue border indicates UPC ...

Страница 36: ...s follows 2a Gently wipe the fiber end with a lint free swab dipped in isopropyl alcohol 2b Use compressed air to dry completely 2c Visually inspect the fiber end to ensure its cleanliness IMPORTANT To ensure maximum power and to avoid erroneous readings Always inspect fiber ends and make sure that they are clean as explained below before inserting them into the port EXFO is not responsible for da...

Страница 37: ...sure that it is fully fitted into the port s corresponding notch 4 Push the connector in so that the fiber optic cable is firmly in place thus ensuring adequate contact If your connector features a screwsleeve tighten the connector enough to firmly maintain the fiber in place Do not overtighten as this will damage the fiber and the port Note If your fiber optic cable is not properly aligned and or...

Страница 38: ...me will remain available for the next trace you acquire This function is particularly useful when working in Template mode or when testing multiple fiber cables If you deactivate the automatic file naming function the application will prompt you to specify a file name The default file name is Unnamed trc By default traces are saved in native trc format but you can configure your unit to save them ...

Страница 39: ...ate one file per wavelength for example TRACE001_1310 sor and TRACE001_1550 sor if you included both 1310 nm and 1550 nm in your test The native format contains all wavelengths in a single file To configure the automatic file naming 1 From the button bar press OTDR Setup 2 Select the Acquisition tab 3 Press Default Trace Information ...

Страница 40: ...5 Press the button appearing next to the Fiber ID box to change the contents of the fiber identification 6 Change the criteria as needed then press OK to confirm your new settings and return to the Default Trace Information window Number of digits composing the variable part Value at which the autonumbering sequence starts The variable part will increase or decrease depending on your choice ...

Страница 41: ...an change the order of apparition with the up and down arrow buttons 9 Press OK to confirm your new settings This preview is updated automatically as you make your selections Items that can be included in the file name To select the separator in the automatic numbering section To add personalized information not included in the filename criteria To modify the order of appearance of the selected co...

Страница 42: ...sed to verify that the fibers are properly connected to the OTDR It verifies the injection level and displays a message when an unusually high loss occurs at the first connection which could indicate that no fiber is connected to the OTDR port By default this feature is not enabled Note The first connector check is only performed when you test at singlemode wavelengths To enable or disable the fir...

Страница 43: ...en comparing two loss values if Of the two loss values the greater loss occurred at the greater wavelength AND The difference between the two loss values exceeds the defined delta loss value The default delta loss value is 0 5 dB which is suitable for most fibers but you can modify it You can also disable macrobend detection Note Macrobend detection is only possible with singlemode wavelengths Fil...

Страница 44: ...lue Only the combinations of wavelengths your module can support will be available For more significant results EXFO recommends to always select the combination of wavelengths including the smallest possible wavelength and the greatest wavelength for example if your module supports 1310 nm 1550 nm and 1625 nm you would select the 1310 nm 1625 nm combination 3b In the Delta loss box enter the desir...

Страница 45: ...f its light source A single light source cannot be conditioned for both 50 μm 50 MMF and 62 5 μm 62 5 MMF fibers at the same time A source conditioned for 50 MMF testing will be under filled for 62 5 MMF testing A source conditioned for 62 5 MMF will be overfilled for 50 MMF testing TIA EIA 455 34A FOTP34 Method A2 is providing a target launch condition that is obtained when using an overfilled so...

Страница 46: ...cket use a mandrel tool with a diameter of 25 mm For fibers without jacket use a mandrel tool with a diameter of 22 mm Nominal launch conditions are overfilled Loss measurements can be slightly pessimistic higher loss when compared to loss measurements done with a 50 MMF source compliant to FOTP34 Method A2 62 5 μm No mode filter required Loss measurements similar to those obtained with a power me...

Страница 47: ...ed to modify other parameters go to Advanced mode see Testing Fibers in Advanced Mode on page 37 and Preparing Your OTDR for a Test on page 21 In Auto mode the application will automatically evaluate the best settings according to the fiber link currently connected to the unit in less than 5 seconds If you interrupt it no data will be displayed Fiber characteristics are evaluated only once per ses...

Страница 48: ...e is displayed and events appear in the events table The application will also display status messages if you have selected to display pass fail messages see Setting Pass Fail Thresholds on page 53 You can save the trace after analysis If former results have not been saved yet the application prompts you to save them before starting a new acquisition Event pane Trace display ...

Страница 49: ...TDR supports singlemode singlemode live or multimode wavelengths under Wavelengths from the list select the desired fiber type for live fiber testing select SM Live for C fiber select 50 μm and for D fiber select 62 5 μm CAUTION Never connect a live fiber to the OTDR port without a proper setup Any incoming optical power ranging from 65 dBm to 40 dBm will affect the OTDR acquisition The way the ac...

Страница 50: ...ton bar or from the keypad The application will use a file name based on the autonaming parameters you defined see Naming Trace Files Automatically on page 24 This file name appears at the top of the graph and at the top of the linear view table Note The application will only display the Save File dialog box if you have activated the feature to always be prompted when you save a file From this dia...

Страница 51: ...ently connected to the unit The pulse width will be determined using a factory defined signal to noise ratio SNR requirement specified where the End of Fiber EoF event has been detected The EoF event detection algorithm uses the end of fiber threshold defined in the tab of the application setup If you are not sure about which value to choose revert to the factory default value for this parameter T...

Страница 52: ...ce the acquisition is complete or interrupted the analysis starts for acquisitions of 5 seconds or more After analysis the trace is displayed Events appear both in the events table and in the linear view if you purchased the optional software package The application will also display pass fail messages if you have selected this feature For more information see Setting Pass Fail Thresholds on page ...

Страница 53: ...n page 42 4 If you want to set your own IOR group index RBS coefficient or helix factor see Setting the IOR RBS Coefficient and Helix Factor on page 43 5 Go to the OTDR tab 6 If you want to test in high resolution simply select the feature see Enabling the High Resolution Feature on page 49 CAUTION Never connect a live fiber to the OTDR port without a proper setup Any incoming optical power rangin...

Страница 54: ...Time on page 45 10 Press Start or from the keypad If the first connector check feature is enabled a message will appear if there is a problem with the injection level see Enabling or Disabling the First Connector Check on page 28 You can modify the acquisition parameters as needed while the acquisition is in progress The OTDR simply restarts the averaging each time a modification is made 11 Once t...

Страница 55: ...n you save a file From this dialog box you can change the location the file name and the file format 11a If necessary change the folder to which the file will be saved by pressing the Location button 11b If necessary specify a file name 12 Press OK to confirm IMPORTANT If you enter the name of an existing trace the original file will be replaced with the new file ...

Страница 56: ...ange acquisition time for the OTDR to average acquisitions over a set time period The application uses this value to determine the best settings for the test Note In Template mode the acquisition time of the reference trace is used for all trace acquisitions not the autorange acquisition time To set the autorange acquisition time 1 From the button bar press OTDR Setup then go to the Acquisition ta...

Страница 57: ...ion determines a default value for each wavelength You can set the IOR value for each available wavelength You should verify this information before each test The Rayleigh backscatter RBS coefficient represents the amount of backscatter in a particular fiber The RBS coefficient is used in the calculation of event loss and reflectance and it can usually be obtained from the cable manufacturer The t...

Страница 58: ...hs OR Enter your own values in the boxes for each available wavelength Note You cannot define a different helix factor for each wavelength This value takes into account the difference between the length of the cable and the length of the fiber inside the cable it does not vary with wavelengths 5 Press Exit OTDR Setup IMPORTANT Change the default RBS coefficient only if you have values provided by ...

Страница 59: ...alues If your OTDR model is FTB 7000D or later youYou can customize the available distance range values see Customizing the Acquisition Distance Range Values on page 98 If you select Auto the application will evaluate the fiber length and set the acquisition parameters accordingly Pulse corresponds to the pulse width for the test A longer pulse allows you to probe further along the fiber but resul...

Страница 60: ...isition Time Values on page 100 In addition to the displayed values the following time modes are available Real used to immediately view changes in the fiber under test In this mode the SNR of the trace is lower and the trace is refreshed instead of averaged until you press Stop You can alternate between real mode and averaging time interval mode while an acquisition is in progress Note The Real i...

Страница 61: ...e value to select it The selection marker will go to that value immediately If you want the application to provide automatic acquisition values move at least one dial to the Auto position The other dials are automatically set accordingly Note If your OTDR supports singlemode singlemode live or multimode wavelengths settings would be applied to either singlemode singlemode live or multimode wavelen...

Страница 62: ...isition Time To use the same pulse and acquisition time for all wavelengths 1 From the button bar press OTDR Setup then go to the Acquisition tab 2 Select the Apply settings to all wavelengths box The modifications you make to pulse time and range settings will now be applied to all wavelengths ...

Страница 63: ... high resolution feature you should use a longer averaging time to maintain a signal to noise ratio SNR that will be equivalent to the one you would have got with the standard resolution Note You can use high resolution with any test mode except when you monitor fiber in real time but you must be in Advanced mode to select it In Template mode you will have to acquire the reference trace using high...

Страница 64: ...Setup 2 Go to the Acquisition tab 3 Select the High resolution acquisition box Note If your OTDR supports singlemode singlemode live or multimode wavelengths the high resolution feature will be activated either for the singlemode singlemode live or multimode wavelengths depending on the selected fiber type 4 Press Exit OTDR Setup to return to the main window ...

Страница 65: ...ach trace immediately after the acquisition or perform the analysis whenever it suits you best When the analysis process is disabled the Event table of a newly acquired trace will be empty You can also set a default fiber span which will be applied during the analysis of all traces to display test results For details see Setting a Default Span Start and Span End on page 58 Note In Auto mode the ap...

Страница 66: ...on bar press OTDR Setup 2 Go to the Analysis tab 3 If you want the OTDR to automatically analyze an acquired trace select the Automatically analyze data after acquisition box If you clear the check box the trace will be acquired without being analyzed Note By default traces are automatically analyzed as they are acquired 4 Press Exit OTDR Setup to return to the main window ...

Страница 67: ...avelength By default the application provides threshold values for the following wavelengths 1310 nm 1383 nm 1390 nm 1410 nm 1490 nm 1550 nm 1625 nm and 1650 nm However if you work with files containing other wavelengths the application will automatically add these custom wavelengths to the list of available wavelengths You will then be able to define thresholds for these new wavelengths You can r...

Страница 68: ...alues that are greater than the predefined thresholds are displayed in white on a red background in the events table The Pass Fail threshold LED located on the front of the unit will also indicate the status green for pass red for fail You can also set the application to display pass fail messages when the Pass Fail test is performed Test Default Minimum Maximum Splice loss dB 1 000 0 015 5 000 Co...

Страница 69: ...t to set thresholds 3 Select the boxes corresponding to the thresholds that you want to use and enter the desired values in the appropriate fields Note If you no longer want the application to take into account a particular threshold simply clear the corresponding box 4 If you want the application to display messages when events fail the test select Display Pass Fail message Threshold to set Value...

Страница 70: ...l other wavelengths proceed as follows 5a Press the Copy to Other Wavelengths button 5b Select the boxes corresponding to the wavelengths for which you want to use the same thresholds Note You can use the Select All button to quickly select all boxes at the same time 5c Press OK to confirm you selection 6 Press Exit OTDR Setup to return to the main window ...

Страница 71: ...tory Settings button 3 When the application prompts you confirm the modification with Yes All threshold values of all wavelengths are returned to their default values except for thresholds that are associated with custom wavelengths IMPORTANT When you revert thresholds to their default values custom wavelengths will be deleted from the list of available wavelengths except if a file using at least ...

Страница 72: ...f available events is set to 10 and therefore does not necessarily reflect the actual number of events displayed When you set a distance value for the span start or end the application searches for a nearby event If it finds one the span start or end is assigned to that event rather than at the exact distance you have set Changes to the span start and span end will modify the contents of the event...

Страница 73: ...e Go to the Position box and enter the desired value using the distance units displayed to the right of the field Under Span end indicate whether the span end position is from the fiber span start or from the end of the fiber OR If you want to set the span start and end on a particular event under Span start and Span end select Set on event From the Event number field use the up or down arrow to s...

Страница 74: ......

Страница 75: ...late add information and comments on the current job then save the trace For a more accurate reference trace you can update it with new events that may occur during the first acquisitions up to fifteen The test application will flag possible problems and discrepancies between the reference trace and other traces Each new acquisition will be compared to the reference trace and the software will mar...

Страница 76: ...ions of Template Mode To speed up trace acquisition in Template mode certain restrictions apply The parameters used to acquire the reference trace are automatically applied when acquiring subsequent traces including the high resolution feature when applicable The reference trace and subsequent traces must be acquired using identical wavelength s but pulse settings can be adjacent and still be acce...

Страница 77: ...ts Traces must have at least two events span start and span end and a fiber section Acquisition mode Reference trace must not be acquired in Real mode see Setting Distance Range Pulse Width and Acquisition Time on page 45 Wavelengths Reference wavelengths and wavelengths of subsequent or reloaded traces must be identical Reference trace pulse 4 Current trace pulse Reference trace pulse Current tra...

Страница 78: ...mode If you want to test using high resolution you will have to select this feature before acquiring the reference trace For more information see Testing Fibers in Auto Mode on page 33 or Testing Fibers in Advanced Mode on page 37 4 If necessary define the span start and end see Analyzing the Fiber on a Specific Fiber Span on page 153 5 Once the analysis is complete save the trace by pressing Quic...

Страница 79: ...ee Naming Trace Files Automatically on page 24 This file name appears at the top of the graph and at the top of the linear view table Note The application will only display the Save File dialog box if you have activated the feature to always be prompted when you save a file From this dialog box you can change the location the file name and the file format ...

Страница 80: ...rts ensure that you connect the fiber to the appropriate port singlemode singlemode live or multimode depending on the wavelength you intend to use 2 When the application prompts you select the trace you want to use as the reference trace If you do not select it immediately you will have to select it manually before starting your test see Selecting a Reference Trace on page 74 By default all wavel...

Страница 81: ...Select the Create Ref Template tab If necessary select Create reference trace to update your reference trace for the next acquisitions This mode will use the first 15 traces or less if you stop the process manually to continue compiling events Note You can disable the mode by clearing the Create reference trace box between two acquisitions ...

Страница 82: ... to return to the main window 3e If you selected Create reference trace at step 4b update your reference trace as follows 3f Press Start or from the keypad If the first connector check feature is enabled a message will appear if there is a problem with the injection level see Enabling or Disabling the First Connector Check on page 28 All traces will automatically be acquired and analyzed and the e...

Страница 83: ...s detected for each wavelength 4a Press OK to close the dialog box Note You can only add events to the reference trace during reference update Note If you chose the Keep all events feature for the acquisitions that will be performed after the update you may find it useful to add newly detected events to obtain a more accurate reference trace ...

Страница 84: ...they exist on the reference trace Question marks identify events found on the main trace that do not exist on the reference trace Numbers will be assigned to new events when the trace is analyzed Asterisks and question marks are used to identify events without modifying the existing event numbers This way you can match the events of the reference trace with those of the main trace more easily Note...

Страница 85: ...ameters you defined see Naming Trace Files Automatically on page 24 This file name appears at the top of the graph and at the top of the linear view table Note The application will only display the Save File dialog box if you have activated the feature to always be prompted when you save a file From this dialog box you can change the location the file name and the file format 5b Repeat steps 3f to...

Страница 86: ...ccording to the option you selected at step 3c Perform acquisitions in Template mode as follows 6a Press Start or from the keypad If the first connector check feature is enabled a message will appear if there is a problem with the injection level see Enabling or Disabling the First Connector Check on page 28 All traces will automatically be acquired and analyzed and the events will be identified 6...

Страница 87: ...e autonaming parameters you defined see Naming Trace Files Automatically on page 24 This file name appears at the top of the graph and at the top of the linear view table Note The application will only display the Save File dialog box if you have activated the feature to always be prompted when you save a file From this dialog box you can change the location the file name and the file format 6d Re...

Страница 88: ...Opening Trace Files on page 159 Note The following procedure will be useful if you did not select a reference trace file when the Open Reference Trace File dialog box appeared during the activation of Template OTDR mode or if you want to use another reference trace To select a reference trace 1 From the Main Menu window press Storage then Open Reference 2 If necessary select the storage location f...

Страница 89: ...ire traces in Fault finder mode 1 Clean the connectors properly see Cleaning and Connecting Optical Fibers on page 22 2 Connect a fiber to the OTDR port If your unit is equipped with two OTDR ports ensure that you connect the fiber to the appropriate port singlemode singlemode live or multimode depending on the wavelength you intend to use CAUTION Never connect a live fiber to the OTDR port withou...

Страница 90: ...to which port you connected your fiber for C fiber select 50 μm and for D fiber select 62 5 μm 4 Press Start or from the keypad If the first connector check feature is enabled a message will appear if there is a problem with the injection level see Enabling or Disabling the First Connector Check for Fault Finder on page 85 ...

Страница 91: ...ph Note The application will only display the Save File dialog box if you have activated the feature to always be prompted when you save a file and if you did not disable the storage features From the Save File dialog box you can change the location the file name and the file format 5a If necessary change the folder to which the file will be saved by pressing the Location button 5b If necessary sp...

Страница 92: ...ll be incremented or decremented according to your selection as follows After saving a result the unit prepares the next file name by incrementing or decrementing the suffix Note If you choose not to save a particular trace file the suggested file name will remain available for the next trace you will acquire By default traces are saved in native trc format but you can configure your unit to save ...

Страница 93: ...ton 3 From the Autonaming Setup dialog box set the parameters If you want the variable part to increase each time a file is saved select Increment If you want it to decrease select Decrement 4 Press OK to confirm your new settings Number of digits composing the variable part Static part Variable part incremented The value appearing in this box will be used in the next file name File name extension...

Страница 94: ...le format for Fault Finder and one default file format for the other OTDR modes By default traces are saved in native trc format but you can configure your unit to save them in Bellcore sor format You can only modify the file format from the Save File dialog box which means you need to save at least one trace in the desired format before it becomes the new default file format Note The application ...

Страница 95: ...t File Format for the Fault Finder Traces To select the default file format 1 From the button bar press Quick Save 2 From the Save File dialog box select the desired format 3 Press OK to save your file in the new format The next files will be saved in the new format ...

Страница 96: ...he application prompts you to confirm the file name Note The file name confirmation parameter used in Fault Finder mode is independent from the one used in the other OTDR modes Auto Advanced and Template The application will use a file name based on autonaming settings see Naming Fault Finder Files Automatically on page 78 If you prefer to hide the Quick Save button see Enabling or Disabling the S...

Страница 97: ...you want to confirm file name each time you press Quick Save select the Always show confirmation window on save check box OR If you never want to be prompted clear the check box Note You can also disable the confirmation of the file name by clearing the Always show this window on save check box directly from the Save File dialog box 3 Press Exit Setup to return to the main window The changes are a...

Страница 98: ...erform quick tests without having to save the results you may prefer to hide the Quick Save button To enable or disable the storage feature 1 From the button bar press Setup then go to the General tab 2 If you want to hide the Quick Save button select the Disable storage features check box OR If you want to display the button clear the check box 3 Press Exit Setup to return to the main window The ...

Страница 99: ...o the OTDR It verifies the injection level and displays a message when a unusually high loss occurs at the first connection which could indicate that no fiber is connected to the OTDR port By default this feature is not enabled Note The first connector check is only performed when you test at singlemode wavelengths Note The first connector check parameter used in Fault Finder mode is independent f...

Страница 100: ...nder To enable or disable the first connector check 1 From the button bar press Setup then select the General tab 2 To enable the first connector check select the First connector check check box OR To disable it clear the check box 3 Press Exit Setup to return to the main window The changes are applied automatically ...

Страница 101: ...ble it if you prefer using an external keyboard Note Hiding or displaying the touchscreen keyboard in Fault Finder mode has no effect on the way the touchscreen keyboard will be used in the other OTDR modes Auto Advanced and Template To enable or disable the touchscreen keyboard 1 From the button bar press Setup then select the General tab 2 If you want to display the touchscreen keyboard select t...

Страница 102: ...can display or hide the grid appearing on the graph s background By default the grid is displayed the file name in the trace display The file name appears at the top of the trace display By default the file name is displayed Note The trace display settings used in Fault Finder mode are independent from the ones used in the other OTDR modes Auto Advanced and Template Grid File name ...

Страница 103: ...splay parameters 1 From the button bar press the Setup button then select the General tab 2 Select the check boxes corresponding to the item you want to display on the graph OR To hide them clear the check boxes 3 Press Exit Setup to return to the main window The changes are applied automatically ...

Страница 104: ...ecting the Distance Units You can select the distance units that will be used in the application The default distance units are the kilometers Note The distance units used in Fault Finder mode are independent from the ones used in the other OTDR modes Auto Advanced and Template Units used ...

Страница 105: ... your display 1 From the button bar select Setup 2 From the Setup window select the General tab 3 From the Distance units list select the item corresponding to the desired units 4 Press Exit Setup You return to the main window and the newly selected measurement unit appears everywhere these units are used ...

Страница 106: ......

Страница 107: ...the unit will create one file per wavelength for example TRACE001_1310 sor and TRACE001_1550 sor if you included both 1310 nm and 1550 nm in your test The native format contains all wavelengths in a single file You can only modify the file format from the Save File dialog box which means you need to save at least one trace in the desired format before it becomes the new default file format Note Th...

Страница 108: ... the new format The next files will be saved in the new format Enabling or Disabling File Name Confirmation By default each time you save a file the application prompts you to confirm the file name The application will use a file name based on autonaming settings see Naming Trace Files Automatically on page 24 Note The file name confirmation parameter used in the Auto Advanced and Template modes i...

Страница 109: ...to confirm file name each time you press Quick Save select the Always show confirmation window on save check box OR If you never want to be prompted clear the check box Note You can also disable the confirmation of the file name by clearing the Always show this window on save check box from the Save File dialog box 3 Press Exit OTDR Setup to return to the main window The changes are applied automa...

Страница 110: ...ce units are the kilometers Note If you select Kilometers km or Kilofeet kft m and ft may appear instead to display more precise measurements Note The distance units used in Auto Advanced and Template modes are independent from the ones used in the Fault Finder mode Note The attenuation of fiber sections is always presented in dBs per kilometer even if the distance units you selected are not the k...

Страница 111: ...1 From the button bar press OTDR Setup 2 From the OTDR Setup window select the General tab 3 From the Distance units list select the item corresponding to the desired distance units 4 Press Exit OTDR Setup You return to the main window and the newly selected distance unit appears everywhere units are used ...

Страница 112: ...available in Advanced mode only If your OTDR model is FTB 7000D or later youYou can customize the values associated with the Distance dial Once the customization is complete you are ready to set the distance range value for your test For more information see Setting Distance Range Pulse Width and Acquisition Time on page 45 Note The Auto value cannot be modified ...

Страница 113: ...Custom Acquisition Parameters button 3 If your OTDR supports singlemode multimode or filtered wavelengths specify the desired fiber type 4 From the Distance list select the value you want to modify the value will become highlighted then press the Edit button Note You can revert to factory values by pressing the Default button 5 In the displayed dialog box enter the new value and confirm with OK ...

Страница 114: ...ime during which the OTDR will average acquisitions If your OTDR model is FTB 7000D or later youYou can even define acquisition time as short as 5 seconds 10 seconds for older modules Note The Auto and Real values cannot be modified You can customize the acquisition time to improve the signal to noise ratio SNR of the trace and enhance the detection of low level events The SNR improves by a factor...

Страница 115: ... OTDR Setup then the Acquisition tab 2 Press the Custom Acquisition Parameters button 3 From the Time list select the value you want to modify the value will become highlighted then press the Edit button Note You can revert to factory values by pressing the Default button 4 In the displayed dialog box enter the new value and confirm with OK ...

Страница 116: ...ble it if you prefer using an external keyboard Note Hiding or displaying the touchscreen keyboard in Auto Advanced and Template modes has no effect on the way the touchscreen keyboard will be used in the Fault Finder mode To enable or disable the touchscreen keyboard 1 From the Main Menu select OTDR Setup then select the General tab 2 If you want to display the touchscreen keyboard select the Use...

Страница 117: ...obend detection linear view Note You cannot hide the optional features if you purchased the software package To display or hide the optional features 1 From the button bar press OTDR Setup 2 In the General tab under Display clear the Show all optional software features check box to hide the options OR Select the check box to display them 3 From the button bar press Exit OTDR Setup to return to the...

Страница 118: ......

Страница 119: ...ents table are explained in the following sections You can also reanalyze existing traces For information on the various file formats you can open with the application see Opening Trace Files on page 159 There are many ways to view the results Graph view Linear view optional Summary table From the trace display and linear views you can also access the following tabs to have more information Events...

Страница 120: ... displayed trace Some items in the trace display are always visible while others will appear only if you choose to display them The contents of the graph area changes according to the selected tab The blue rectangle on the Y axis relative powers indicates the proper injection level range for the defined test pulse Default injection level Event no 4 Events table Distance units ...

Страница 121: ...u can view all of the traces in turn in both the Trace Info pane and the trace display with the navigation buttons For more information see Displaying or Hiding a Trace on page 130 Each wavelength is displayed in a different color The colors are assigned dynamically Wavelengths of the reference traces are also displayed using the colors corresponding to those of the main trace but with a darker sh...

Страница 122: ...ill be displayed in colors only if the Mark faults in event table item is selected in OTDR setup green for pass red for fail grey or black for events and fiber sections appearing outside the current fiber span Otherwise all events will be displayed in grey and fiber sections in black When you select an event or a fiber section in the events table the linear view automatically scrolls to display th...

Страница 123: ...t be displayed when the events table is empty Traces must have been analyzed before you can see them in the linear view If you configured the application to show the macrobends OTDR Setup General tab when you display the trace corresponding to the greatest wavelength of the selected wavelength combination you can view a line containing information about macrobends For example if the wavelength com...

Страница 124: ...In this case Continuous fiber will be displayed instead When you select an element in the summary table element is highlighted if you double tap or press Enter on the unit s knob the application automatically switches to the graph view The graph is displayed with full trace zoom except if the status of the selected wavelength is fail In this case the application zooms in on the first event or fibe...

Страница 125: ...e bottom of the summary table If no macrobends were detected the application displays No macrobend has been detected instead of the information on the macrobends If the traces that have been analyzed do not match the pair of wavelengths selected in the OTDR setup for the detection of macrobends for example you perform an acquisition at 1310 nm and 1625 nm and the wavelengths selected for the detec...

Страница 126: ...ear view optional are displayed You can view information about all detected events on a trace and fiber sections by scrolling through the events table In graph view when you select an event in the events table marker A appears on the trace over the selected event When the selected event is a fiber section this fiber section is delimited by two markers A and B For more information on markers see Us...

Страница 127: ...about the sub events If an asterisk appears next to the event symbol the tooltip will also show Modified to indicate that this event has been modified manually If the asterisk appears next to the event number Added will appear to indicate that this event has been inserted manually For each item listed in the events table information is displayed Type Various symbols are used to describe different ...

Страница 128: ...ustry that provides the attenuation values in dB per kilometers Cumul Cumulative loss from the trace span start to span end the running total is provided at the end of each event and fiber section Cumulative loss is calculated for the events displayed in the events table excluding those that are hidden For a more accurate link loss value refer to the loss measurement displayed in the Trace Info ta...

Страница 129: ...y locate an event in the events table 1 Ensure that the button is selected in the zoom button bar 2 Select the event on the trace The list scrolls automatically to the event you selected Graph Event no 1 Event table Zoom on event button Event editing buttons ...

Страница 130: ...trace display You can also use from the keypad to select the desired marker and move it with the selection dial located on the front of the FTB 200 v2 Compact Modular Platform Selecting marker A or B will move the a A or B b pair For more information on how to perform manual measurements see Analyzing the Results Manually on page 163 Trace Info Tab The information about all the trace files includi...

Страница 131: ...ble below gives an overview of the information that is available in each case As soon as a trace is displayed new acquisition or existing file zoom controls are available see Using Zoom Controls on page 123 Note If you want to use the zoom on event feature you must select the button from the Events tab before switching to full screen mode Tab that was selected Displayed information in full screen ...

Страница 132: ...sitions are complete the application will automatically switch to the defined default view see Selecting the Default View on page 119 If you prefer that the graph remains in full screen after the acquisitions are complete ensure that the default view is set to Graph in OTDR Setup To display the graph in full screen From the main window press the button The graph is now displayed in full screen mod...

Страница 133: ...s Auto Advanced Template a particular view can be displayed View OTDR modes for which view is available Remarks Graph Auto Advanced Template Default view For more information see Graph View on page 106 Linear Auto Advanced Template Available with the optional software package only In this view events are displayed sequentially from left to right Macrobends are identified with symbols on the trace ...

Страница 134: ...ess Exit OTDR Setup to return to main window The application will automatically switch to the selected view when you perform the next acquisitions Summary table Auto Advanced This table gives for each wavelength the pass fail status of the results the span loss and span ORL values Span length is also displayed If you purchased the option information on macrobends will be displayed For more informa...

Страница 135: ...n you work in full screen mode see Displaying the Graph in Full Screen on page 117 if you want to view the event table without having to go back in normal view mode To display the event table after acquisitions 1 From the button bar select OTDR Setup then the General tab 2 Under Application options select Switch to the event table page after an acquisition 3 Press Exit OTDR Setup to return to main...

Страница 136: ...p window select the General tab 3 Under Application options select Zoom in automatically on defined fiber span to automatically zoom on the fiber span in the trace display when a trace is opened or selected or after trace analysis OR Clear the box to leave the zoom level as is Note Zoom in automatically on defined fiber span is active only when in full trace view not when you have zoomed in on a t...

Страница 137: ...ponding buttons or let the application automatically adjust the zoom on the currently selected event from the events table only available when the events window is displayed You can quickly zoom in on or out of the selected event You can also return to the original graph value Note You cannot move the markers with the button Selection mode Move view area Zoom selector Zoom in Full view Zoom out ...

Страница 138: ...te mode the zoom factor and marker positions correspond to those of the reference trace If you want the application to automatically zoom on the defined fiber span see Automatically Zooming in on the Fiber Span on page 122 To view specific portions of the graph You can define which portion of the graph will be visible by selecting the button and dragging the graph with the stylus or your finger Th...

Страница 139: ...re you want to zoom on the graph with the stylus or your finger The application automatically adjusts the zoom by a factor 2 around the point that was pressed To revert to the complete graph view Press the button Note If the Zoom in automatically on defined fiber span feature is selected in the OTDR setup the application will zoom in between span start and span end To automatically zoom in on the ...

Страница 140: ... displayed the graph background You can display the graph with a black invert color feature or a white background By default the background is white the zoom window The zoom window shows you which portion of the graph is being magnified By default the zoom window is displayed the file name in the trace display The file name appears at the top of the trace display By default the file name is displa...

Страница 141: ...1 From the button bar press the OTDR Setup button then select the General tab 2 Select the boxes corresponding to the item you want to display on the graph OR To hide them clear the boxes 3 Press Exit OTDR Setup to return to the main window The changes are applied automatically To display a black background ...

Страница 142: ...play Launch level In the events table the Launch Level event is represented by the icon In the Att column the injection level value for that event is identified by the symbol You can hide the injection level value and symbol from the Att column but not the icon Including span start and span end When applicable the application will include the losses caused by the span start and span end events to ...

Страница 143: ... Event Table To customize the events table appearance 1 From the OTDR Setup window select the Event Table tab 2 Select the boxes corresponding to the item you want to display or include in the table OR To hide them clear the boxes 3 Press Exit OTDR Setup ...

Страница 144: ...avelength traces You can select the fibers and the wavelengths for multiwavelength files that will be available when using the navigation button You can also specify which trace will be displayed current trace By default the application takes the last item from the list of trace files you have just opened To display or hide traces in turn Press the Next Trace button to switch from one fiber to ano...

Страница 145: ...n trace cannot be displayed with the navigation button In multiwavelength trace files you can show or hide traces independently 3 From the list of traces select the row corresponding to the trace you want to set as the current trace the row will become highlighted and press the Set as Active Trace button The trace will turn black in the display to indicate that it was selected Note In Template mod...

Страница 146: ...ou acquired main or reference does not meet your requirements you can clear that trace and start over To clear traces from the display 1 From the button bar press Storage 2 From the Storage dialog box press Clear Main or Clear Reference If you had already acquired or modified but not stored some traces a warning message appears for each trace even if the trace is hidden asking you if you want to s...

Страница 147: ...ible in Advanced mode You can modify the index of refraction IOR also known as group index Rayleigh backscatter RBS coefficient and helix factor for the displayed trace Modifications you make are only applied to the current trace that is to a particular wavelength not to all traces The application will only prompt you to reanalyze the trace if you modify the RBS coefficient no analysis necessary w...

Страница 148: ...glemode or multimode Range Distance range used to perform the acquisition Pulse Pulse width used to perform the acquisition Time Duration either in minutes or seconds of the acquisition Span length Measured length of the total fiber span between span start and span end Span loss Total measured loss of the fiber calculated either between the span start and the span end or on the total fiber span de...

Страница 149: ...of the displayed trace also known as group index If you modify this parameter the distance measurements for the trace will be adjusted You can enter an IOR value directly or let the application calculate it with the distance between span start and span end you provide The IOR value is displayed with six digits after the decimal point Backscatter Rayleigh backscatter coefficient setting of the disp...

Страница 150: ... Trace Info tab 2 Press the Fiber Settings button 3 Enter the desired values for the current trace in the appropriate boxes OR If you want to revert a particular item to its default value press the Default button appearing next to this item Note Except for the fiber type modifications you make will only be applied to the current trace that is to a particular wavelength not to all traces ...

Страница 151: ... same for other multimode wavelengths If you already know the IOR value you can enter it in the corresponding box However if you prefer to let the application calculate the IOR value as a function of the distance between span start and span end press Set IOR by Distance then enter the distance value 4 If you want to save the modified IOR RBS and helix Factor values for the next acquisitions perfor...

Страница 152: ...r end of analysis launch level merged events span start span end In the case of a reflective event you can also specify whether the event corresponds to an echo a possible echo or no echo Note If you want to modify the attenuation value of a fiber section see Changing the Attenuation of Fiber Sections on page 146 IMPORTANT If you reanalyze a trace all of the modified events will be lost and the ev...

Страница 153: ... markers you can define a new location for the selected event You can reposition all markers directly by dragging them or by pressing where you want to relocate them on the graph Selecting marker A or B will move the a A or B b pair Note The current marker locations are set during the analysis to calculate and display the original event loss and reflectance Marker a Marker A Marker B Marker b ...

Страница 154: ...see Using Markers on page 165 4 Position marker B after the end of the event where the trace returns to a regular loss inside the fiber and submarker b to the right of marker B as far as possible from marker B without including the following event The area between markers B and b must not include any significant variation For more information on positioning markers see Using Markers on page 165 Ev...

Страница 155: ...up down arrows of the Echo status list Note Select if you want to indicate that the event is not an echo 6 Press OK to accept the modifications you have made or Cancel to return to the events table without saving the changes The modified events are identified with appearing beside the event symbol in the events table as shown below ...

Страница 156: ...not detect it because it is hidden in the noise or because the splice loss is lower than the minimum detection threshold see Setting Pass Fail Thresholds on page 53 You can add this event to the events table manually This will add a number on the trace at the location of the insertion but it will not modify the trace To insert an event 1 From the Events tab press Add New Event IMPORTANT Inserted e...

Страница 157: ...ies where the event will be inserted Use the marker arrows to move marker A on the trace display 3 Once you have determined the location under Event use the up down arrows next to the box to select the desired event type 4 Press OK to insert the event or Cancel to return to the events table without making any changes Inserted events are marked with asterisks appearing beside the event number ...

Страница 158: ...section launch level end of fiber span start span end Note The End of fiber event indicates the span end that was set for the first analysis of the trace not the span end assigned to another event or distance from the span end in the Analysis tab IMPORTANT The only way to recover deleted items is to reanalyze the trace as you would for a new trace For more information see Analyzing or Reanalyzing ...

Страница 159: ...3 When the application prompts you press Yes to confirm the deletion or No to keep the event 4 From the Edit Comments dialog box enter a comment To delete a comment 1 Select the event on which you want to delete a comment 2 From the Events tab press Edit Comments 3 From the Edit Comments dialog box delete the text 4 Press OK ...

Страница 160: ...enuation value of fiber sections Note If you want to modify events see Modifying Events on page 138 To modify the attenuation of a fiber section 1 From the event table select the fiber section 2 Press the Change Event button The A and B markers appear in the trace display IMPORTANT If you reanalyze a trace all of the modifications made to the fiber sections will be lost and the events table will b...

Страница 161: ...e markers serve only to set the new attenuation value Their actual locations will not be modified Fiber section loss and attenuation are displayed respectively in the Loss LSA and Att LSA boxes 4 Press OK to accept the modifications you have made or Cancel to return to the events table without saving the changes The modified fiber sections are identified with in the events table as shown below Los...

Страница 162: ...nto loss events or detect reflective events that could be harmful to network and other fiber optic equipment End of fiber threshold To stop the analysis as soon as an important event loss occurs for example an event that could compromise signal transmission toward the end of a network IMPORTANT The end of fiber EoF threshold that you define will be used in Automatic mode and in Advanced mode if yo...

Страница 163: ...With the threshold set to 0 05 dB two events are displayed at distances corresponding to the location of the first and second splices Threshold at 0 1 dB Only the first splice is displayed as the threshold is set to 0 1 dB and the second splice loss is lower than 0 1 dB Threshold at 0 15 dB The first two splices are not displayed as the threshold is set to 0 15 dB and the first and second splice l...

Страница 164: ... set the parameters Enter the desired values in the appropriate boxes OR Select the default settings by pressing Default 4 Press Exit OTDR Setup The analysis detection thresholds you have just set are applied to all newly acquired traces Note Analysis thresholds are only saved in the trace during analysis For traces acquired but not yet analyzed you can change the analysis detection thresholds in ...

Страница 165: ...or Disabling Analysis After Acquisition on page 51 reanalyze a trace acquired with a previous version of the software re create the events table if it was modified perform a Pass Fail test if enabled for more information see Setting Pass Fail Thresholds on page 53 When you reanalyze a trace acquired in Template mode Events copied from the reference trace identified by will be lost The application ...

Страница 166: ...tem for setting the span start and end markers on the trace On the first analysis this dialog box is not displayed and the default span start and end are applied See Setting a Default Span Start and Span End on page 58 Keep current span delimiter positions applies the current fiber span upon trace reanalysis Reset span delimiters positions applies the fiber span defined in the OTDR Setup upon trac...

Страница 167: ...ed during the first analysis or reanalysis performed upon trace acquisition To set a fiber span 1 From the main window go to the Events tab 2 Define the span event location by moving marker A along the trace using the selection dial 3 Press Set as Span Start or Set as Span End to set the span start or span end marker on the appropriate event in the trace display Changes to the span start and span ...

Страница 168: ...00D or later you can configure the application to detect reflective ends of fiber Note The detection of reflective ends of fiber is only performed when you test at singlemode wavelengths Once you have selected the option the detection will be performed automatically on the next acquisitions If a trace was acquired without selecting the option first you will have to reanalyze the trace manually for...

Страница 169: ...le reflective fault located in the noisy area a a The cumulative loss value will remain the same for all elements appearing after the event on which the span end was set according to the conventional analysis The span loss value Trace Info tab will correspond to the loss calculated between span start and the event on which the span end was set according to the conventional analysis If applicable r...

Страница 170: ...o to the Event Table tab IMPORTANT The analysis will stop as soon as the loss of an event crosses the end of fiber EoF threshold The application will mark the event as an end of fiber event In this case even if you selected the option the application will not search the noisy portion of the trace for reflective ends of fiber If you want to do so you will have to increase the EoF threshold see Sett...

Страница 171: ... or Disabling the Detection of Reflective Ends of Fiber 3 If you want to enable the option under End of Fiber parameters select the Reflective end of fiber detection box OR If you prefer to disable the option clear the box 4 Press Exit OTDR Setup ...

Страница 172: ...ain trace you may want to interchange main and reference traces When you swap traces the application will provide a new set of events corresponding to the new main trace To swap traces 1 From the button bar press Storage 2 From the Storage dialog box select Swap Main Reference Note You can change a main trace into a reference trace and vice versa even if only one trace is in the application s memo...

Страница 173: ...ce files simultaneously each containing several traces In Automatic mode you can open a trace file for viewing only Consequently you cannot select a trace as main or reference trace Note You cannot open bidirectional trace files in the OTDR test application Use the OTDR Bidirectional application instead see Analyzing Traces with the Bidirectional Analysis Application on page 193 When you open trac...

Страница 174: ...atically zoom in on the event that was selected for the second trace Markers that are displayed correspond to those of the selected event Trace that has been saved with a manual zoom no reference file is open Application zooms in on the first trace wavelength of the file according to the zoom area and zoom factor that were saved with the file Application does not zoom in on the selected events The...

Страница 175: ...ker settings of the reference file to all traces main and reference For detailed information on compatibility between EXFO s file formats and software versions see OTDR Trace File Compatibility on page 178 For information on the various criteria that are applied when loading traces in Template mode see Restrictions of Template Mode on page 62 For information on how to navigate between traces see D...

Страница 176: ...her the selected trace will be used as the main or the reference trace You can select another file from the list and set the trace as the main or reference trace according to your needs 5 Press OK You return to the Storage dialog box If you had already acquired but not stored a trace the application prompts you to save the current trace even if the trace is hidden Press Yes to store the trace You ...

Страница 177: ... by using the same measurement methods as the analysis that is the four point event loss and the A B LSA attenuation Note This function is not available in Auto mode because you do not have access to the Measure tab in this mode You can display the values corresponding to the following measurement methods For loss Four point event loss A B LSA Least Square Approximation loss For attenuation Two po...

Страница 178: ...o select the attenuation and loss values that will be displayed 1 From the button bar press OTDR Setup then go to the General tab 2 Press the Measurement Method button 3 Select which values you want to see in the Measure tab 4 Press OK to confirm your selection 5 Press Exit OTDR Setup to return to the OTDR application ...

Страница 179: ...ight and left arrow buttons to move the marker along the trace You can also move it with the selection dial located on the front of the unit Note You can also select the marker directly on the trace display and drag it to the desired position If a marker is moved closed to another one both will move together This ensures a minimum distance is maintained between markers A marker may disappear from ...

Страница 180: ... table You can retrieve the position of an event as well as the distance between events manually You can also display various relative power readings Distances and relative powers correspond to the X axis and Y axis respectively To get the distance to an event and the associated relative power level 1 From the main window select the Measure tab 2 Move marker A to the beginning of the event For mor...

Страница 181: ...tion in Rayleigh backscatter RBS caused by this event Event loss can result from both reflective and non reflective events Two loss calculations are provided simultaneously the four point event loss and the A B LSA loss Both calculations use the least square approximation LSA method to determine the event loss However the four point event loss is the preferred method and the one that corresponds t...

Страница 182: ...ht line to the backscatter data within the two regions defined by markers a A and b B that is over the regions to the left and to the right of the event bordered by markers A and B respectively The two fitted lines are then extrapolated toward the center of the event and the loss event is directly read from the drop in power between the two lines Four point event loss a b ...

Страница 183: ...e reduction in power dB over the distance between the two markers as calculated from the slope of the fitted line Although this method works fairly well for splice loss it is clearly not appropriate for reflective events definitely not a straight line event A B LSA Loss is mainly used to rapidly compute loss over a given length of a fiber section Note A B LSA event loss measurements should be used...

Страница 184: ... Results section press Loss Markers a A B and b appear on the graph 3 Zoom in and position marker A at the end of the linear area preceding the event to be measured For more information see Using Zoom Controls on page 123 and Using Markers on page 165 4 Position submarker a at the beginning of the linear area preceding the event to be measured must not include any significant events ...

Страница 185: ...he end of the linear area following the event to be measured must not include any significant events Note The loss values that are displayed depend on which calculation methods are selected see Selecting the Attenuation and Loss Values that Will Be Displayed on page 163 4 3 5 6 Event to be measured Linear area Linear area Least square approximation Four point event loss from the areas delimited by...

Страница 186: ...Only those two points are used to perform the calculation and there is no averaging The least square approximation LSA method measures the attenuation loss over distance between two points by fitting a straight line in the backscatter data between markers A and B The LSA attenuation corresponds to the difference in power Δ dB over the distance between two points The LSA method when compared to the...

Страница 187: ...on see Using Markers on page 165 4 Zoom in on the trace and fine tune the marker positioning if necessary For more information see Using Zoom Controls on page 123 Note There should not be any events between markers A and B when performing the two point attenuation measurement Note The attenuation values that are displayed depend on which measurement methods are selected see Selecting the Attenuati...

Страница 188: ...e Refl button Markers a A and B appear on the graph 3 Zoom in and position marker A on the linear area preceding the event to be measured For more information see Using Zoom Controls on page 123 and Using Markers on page 165 4 Position submarker a at the beginning of the linear area preceding the event to be measured 5 Position marker B at the peak of the reflective event to be measured Note Using...

Страница 189: ... the total fiber span depending on the option you have selected in the Setup window Optical return loss ORL refers to the total effect of multiple reflections and scattering events within a fiber optic system Note If you are testing in Real time the reflectance value you will get is not necessarily accurate To get the ORL value 1 From the main window select the Measure tab 2 In the Results section...

Страница 190: ......

Страница 191: ...delete trace files you must use the File Manager utility Saving a Trace in a Different Format With the OTDR application you can save traces in native trc and Bellcore sor formats By default the application saves the traces in native trc format For information on how to define the default file format see Selecting the Default File Format on page 93 To save an OTDR trace file in another format Use t...

Страница 192: ...atibility OTDR Trace File Compatibility The table presented hereafter shows the compatibility between the format of a specific trace and the software that you may use to open that trace Symbols used in the table Meaning X Fully compatible Conv Conversion or reanalysis necessary Not compatible ...

Страница 193: ...100 format Conva Conva ToolBox 6 5 or earlier Convb b Should be reanalyzed to view the events table X X X Conva Conva Conva ToolBox 6 7 to 6 20 Convc c Data should be saved in FTB 300 ftb300 format and reanalyzed to view the events table Convc X X Conva d d Triple wavelength trace files are not compatible Conva Conva ToolBox 6 21 or later Convc Convc Convf e X Conva d Conva X FTB 100 2 2 or earlie...

Страница 194: ... Moving Renaming or Deleting Trace Files If you want to copy move rename or delete trace files you will have to process the files manually via File Manager available from Compact ToolBox For more information refer to your unit help e Should be converted to ToolBox 6 7 6 20 format f Should be converted with ToolBox 6 21 or later ...

Страница 195: ...me you access the report to add information to a newly acquired trace the template is automatically recalled eliminating repetitive documentation operations Note The information must be entered before acquiring traces in Template mode For more information see Testing Fibers in Template Mode on page 61 Some of the information is common to all wavelengths location A and B cable ID and fiber ID Some ...

Страница 196: ...and Serial no boxes is provided by the application and cannot be edited You can edit the Fiber ID only if the Use autonaming feature is not selected Note If you select the Use autonaming box the Fiber ID box becomes unavailable If you want to save the contents as a template use the Save as Template button 3 Press Exit Report to return to the trace display The information entered is saved with the ...

Страница 197: ...he information related to the active trace is printed in a report but you can also print all the traces the current file contains available in Advanced and Auto modes only In Template mode only the current trace will be printed The following table shows the various items that can appear on a report depending on the test mode Auto Advanced or Template that is selected Item appearing on the report A...

Страница 198: ... particular wavelength the table could be printed if macrobends have been detected at other wavelengths By default this item is selected if you purchased this option Otherwise the item will be unavailable or hidden if you configured the application as such see Displaying or Hiding the Optional Features on page 103 X X Cable information a single table containing information such as the fiber ID cab...

Страница 199: ...urement link length and loss Average loss Average splice loss and Span ORL By default this item is selected X X X Markers marker information a A b B and A to B distances as well as A to B attenuation loss and ORL By default this item is selected X X Event table If you selected the Mark faults in event table feature from the OTDR setup the failed results will appear in white on a black Otherwise th...

Страница 200: ...report By default this item is selected if you selected the Mark faults in event table feature from the OTDR setup Otherwise the item will be unavailable X X X Graph You can select the Zoom item if you want the traces to be printed with the zoom factor you selected Manual zoom Graphs will be printed exactly as they appear on screen The same zoom factor will be applied to all traces wavelengths of ...

Страница 201: ...t the report characteristics including whether you want to include the graphs or not Select the Print all traces item to print all traces wavelengths from the current file available in Auto and Advanced modes only 2 Press Print to start the process You will automatically return to the main window ...

Страница 202: ......

Страница 203: ... visual fault location and fiber identification Note The VFL option will be available only if your OTDR is equipped with a VFL port CAUTION Never connect a live fiber to the OTDR port without a proper setup Any incoming optical power ranging from 65 dBm to 40 dBm will affect the OTDR acquisition The way the acquisition will be affected depends on the selected pulse width Any incoming signal greate...

Страница 204: ... one end of the fiber under test to the OTDR port If your unit is equipped with two OTDR ports ensure that you connect the fiber to the appropriate port singlemode singlemode live or multimode depending on the wavelength you intend to use 3 From the main window press the button 4 Select the wavelength you want to use Note If only one wavelength is available it is selected by default ...

Страница 205: ...ond then will be off for the next second then be sent again for 1 second and so on If you want the OTDR to emit light in a flashing pattern select 1 kHz Blink or 2 kHz Blink 6 Under Source press Turn ON You can stop light emission at any time by pressing Turn OFF Using an EXFO power meter with tone detection features such as the FOT 930 or FPM 300 an operator at the other end will be able to quick...

Страница 206: ...e 22 2 Connect the fiber under test to the VFL port 3 From the main window press the button 4 Select Continuous to use the VFL with continuous output or Blink to use the VFL with 1 Hz pulsed output 5 Under VFL press Turn ON to send the VFL signal You can stop the VFL signal emission at any time by pressing Turn OFF ...

Страница 207: ...r the application to be able to match events the two OTDR traces must have been acquired in opposite directions and on the same fiber span The application will perform a bidirectional analysis and generate an events table with the averaged loss for each event that is the average of the losses obtained from both directions You can also analyze OTDR traces with multiple wavelengths To work with the ...

Страница 208: ... sections with different types of fibers or fibers from different manufacturers Gainers and exaggerated losses result from the joining of two fibers of different mode field diameters MFD The mode field diameter of a fiber corresponds to the size of the area where light is dispersed across its core and cladding Mismatch of MFDs will contribute to differences in back reflected signal that are not re...

Страница 209: ...ng and Exiting the Bidirectional Analysis Application The bidirectional analysis application is available from your unit To start the Bidirectional Analysis application 1 From Compact ToolBox go to the Test Tools tab 2 Double tap OTDR Bidirectional OR Select OTDR Bidirectional and press Start located at the bottom of the Test Tools tab ...

Страница 210: ...ds and to configure options related to spans To switch from one wavelength to another available only when A B and B A traces contain multiple wavelengths To view the table of events corresponding to the current direction at the current wavelength To view information about the current measurement modify trace identification A B and B A traces or modify acquisition settings A B and B A traces To rea...

Страница 211: ...he OTDR application before opening them with the bidirectional analysis application You can open unidirectional trace files to combine them into a bidirectional measurement file It is possible to use both single wavelength and multiwavelength traces However once a multiwavelength trace file is recalled it is converted to single wavelength trace files Bidirectional measurement files will automatica...

Страница 212: ...erate the bidirectional measurement You can open traces of Telcordia Bellcore non EXFO version 200 format but you cannot reanalyze them However they can be used to generate the bidirectional measurement Pulse width Must be identical or adjacent for both traces Pulses can be considered as adjacent when for example 2 5 μs and 10 μs are adjacent because 10 is equal to 2 5 x 4 Fiber types Use only tra...

Страница 213: ...nd of the B A trace is aligned with the span start of the A B trace If the application cannot match the traces perfectly error or warning messages will appear A message will be displayed if there are inconsistencies in the events table wavelength index of refraction helix factor or Rayleigh backscatter coefficient Note The A B and B A traces are displayed in full view mode 1 1 zoom factor ...

Страница 214: ...ace file The next time you create a bidirectional measurement the application will suggest this path by default 2c Press the Browse button on the right of the B A file path box 2d Select the second file ensure that it is highlighted and press Open Note The application will keep in memory the path to your B A trace file The next time you create a bidirectional measurement the application will sugge...

Страница 215: ... the unidirectional traces and the bidirectional measurement one wavelength per bidirectional file Note The application will keep in memory the path to your bidirectional measurement file The next time you open a bidirectional measurement the application will suggest this path by default To open an existing bidirectional measurement file 1 From the Main Menu select File Open 2 Select the desired f...

Страница 216: ...ectional Measurement You can view in turn the bidirectional measurement as well as the unidirectional trace files When you create a bidirectional measurement using multiwavelength files you can also navigate through the different wavelengths To switch from one direction to another From the main window under Direction select the desired direction File name ...

Страница 217: ...Displaying Traces and Bidirectional Measurement To switch from one wavelength to another From the main window use the buttons Note You can also use from the keypad To switch from one wavelength to another available only when A B and B A traces contain multiple wavelengths ...

Страница 218: ...al OTDR application You can view the corresponding graphs see Graph View on page 205 and tables of events see Events Tab on page 208 as well as obtain more information about the status of the bidirectional measurement and or A B and B A traces see Summary Table There are many ways to view the results Graph view Summary table From the main window you can also access the following tabs to have more ...

Страница 219: ... if you choose to display them The contents of the graph area changes according to the selected direction and wavelength You can change trace display parameters such as the grid and zoom window display For more information see Setting General Parameters on page 240 You can view all of the traces in turn in both the Trace Info tab and the trace display with the navigation buttons For more informati...

Страница 220: ...result exceeds the thresholds and the span loss values A global status for the bidirectional measurement is also available The span length distance between span start and span end is also displayed Values having a fail status appear in white on a red background Span length corresponds to the greatest span length value among all bidirectional measurements at all wavelengths Span loss of the bidirec...

Страница 221: ... for which the status is fail the Trace Info tab The application highlights the row corresponding to the first element span loss span length or span ORL for which the status is fail You can press the Details button for further information on the element having a fail status Note Instead of pressing the Locate button you can double tap the element having a fail status If you do not see any status p...

Страница 222: ...ill automatically select the event or fiber section corresponding to the point you press on the graph The events table lists all the events detected on the fiber An event can be defined as the point at which change in the transmission properties of light can be measured Events can consist of losses due to transmission splices connectors or breaks If the event is not within the established threshol...

Страница 223: ...ce between the OTDR and the measured event or between the event and the beginning of the fiber span OR Length of a fiber section distance between two events Attenuation loss distance of individual fiber section Average of the loss measured between A B and B A traces most important information Cumulative loss from span start to span end running total is provided at the end of each event and fiber s...

Страница 224: ...ab If you want to modify events or fiber sections see Modifying Events on page 231 Inserting Events on page 227 and Changing the Attenuation of Fiber Sections on page 237 Event type detected see Description of Event Types on page 297 Event number Position distance between the OTDR and the measured event or between the event and the beginning of the fiber span OR Length of a fiber section distance ...

Страница 225: ... 211 Viewing Results To quickly locate an event in the events table 1 Ensure that the button is selected in the zoom button bar 2 Select the event on the trace The list scrolls automatically to the event you selected Graph Event no 4 Events table Zoom on event button ...

Страница 226: ...see Displaying Traces and Bidirectional Measurement on page 202 However you can only modify the analysis settings for the current A B and B A traces not for the bidirectional measurement see Modifying Trace Analysis Settings on page 252 To view information about the bidirectional measurement or a specific trace 1 From the main window select the Trace Info tab 2 Under Direction select the desired d...

Страница 227: ...n end Span loss Total measured loss of the fiber calculated either between the span start and the span end or on the total fiber span depending on the settings you have chosen in the setup window Average loss Average loss of the total fiber span as a function of distance Average splice loss Average of all non reflective events between span start and span end Maximum splice loss Maximum value of al...

Страница 228: ...hether or not the acquisitions were performed using the high resolution feature IOR Index of refraction of the displayed trace Backscatter Rayleigh backscatter coefficient of the displayed trace Helix factor Helix factor setting of the displayed trace Splice loss detection Splice loss threshold for detecting small non reflective events during trace analysis Reflectance detection Reflectance thresh...

Страница 229: ...er unless you have saved them see Saving the Span Start and Span End Information on page 246 The table below shows what happens when you start the analysis depending on the direction that is currently selected Note In the case of multiwavelength files the analysis is performed for the selected wavelength only If you prefer to focus your analysis on a specific fiber span see Modifying the Alignment...

Страница 230: ...nd regenerate bidirectional measurement 1 From the main window select the Edit tab 2 Under Direction select the desired option depending on which trace you want to reanalyze 3 If you are working with a multiwavelength file select the desired wavelength using the buttons 4 Press the Analyze button 5 When the application prompts you select Yes to complete the operation ...

Страница 231: ...art and or span end of one or both of the unidirectional traces Keep in mind that when you modify the B A trace the trace is presented in the opposite direction of the A B trace and so are the events Note The icons used in the small table of events for the B A trace follows the standard for the event types see Description of Event Types on page 297 For this reason they do not match the symbols use...

Страница 232: ... be located in the noise peak detected at the end of the fiber span The end of fiber will be moved accordingly However if you move the span end back within the original fiber span the end of fiber will remain at its current location it will not be moved back with this new span end The application will refresh the graph to reflect the new span start and span end positions automatically IMPORTANT If...

Страница 233: ...ollowing methods Drag marker A to the desired span event location Use the selection dial located on the front of the unit to move marker A Enter a distance value in the Position box and press Use the single arrow buttons to move marker A on the trace From the small table of events press directly the row corresponding to the existing event that you would like to designate as a span event Note Each ...

Страница 234: ...the span start becomes event 1 and its distance reference becomes 0 For the A B trace the span end becomes the last event and its distance reference becomes 0 Only events between the span start and span end will be numbered in the trace display and events table The cumulative loss is calculated within the defined fiber span only IMPORTANT To keep a set fiber span during trace reanalysis activate t...

Страница 235: ...table You can also return to the original graph value Note You cannot move the markers with the button In the case of a multiwavelength file when you zoom in or out on the graph the application will apply the new zoom context zoom factor selected area and selected event when applicable to the other bidirectional measurements wavelengths Only the zoom context of the bidirectional measurement will b...

Страница 236: ... 1625 nm Only the selected events of the bidirectional measurement will be saved along with the bidirectional file When you open an existing bidirectional file the application restores the zoom context of the bidirectional measurement This zoom context will also be applied to the A B trace The B A trace will be displayed in complete graph view and event 1 will be selected If the button is selected...

Страница 237: ...ess and hold this button to select the zooming direction in the menu Then define the zoom area with the stylus or your finger a rectangle with dotted lines will appear to help you define the area Once you release the stylus the application automatically zooms in on the graph according to the zooming type you have selected All of the other zoom buttons except for the zoom on selected event button w...

Страница 238: ... 1 From the main window select the Graph tab 2 Select the Events tab 3 Under Direction select the desired option 4 From the events table select the desired event 5 Press to automatically adjust the zoom factor The button remains selected until you deselect it or open another bidirectional file To revert to the complete graph view Press the button ...

Страница 239: ...ther To move a marker 1 If you intend to move the markers directly from the graph ensure that the button is selected in the zoom button bar 2 From the Edit tab press the buttons corresponding to the markers that you want to move The buttons will turn yellow indicating that a specific marker is selected Selecting marker A or B will move the a A or B b pair However it is possible to only move the a ...

Страница 240: ...ter a distance value in the Position box and press Note Keep in mind that when you work with the B A trace the trace is presented in the opposite direction of the A B trace and so are the markers For example instead of having the distance between span start and A as the first element you would have the distance between span start and B As another example instead of having the distance between A an...

Страница 241: ...u can insert events in the events table manually This could be useful for example if you know that there is a splice at a given location but the analysis does not detect it because it is hidden in the noise or because the splice loss is lower than the minimum detection threshold see Setting Pass Fail Thresholds on page 247 If you create this event the application will add a number on the trace at ...

Страница 242: ...0 Series Inserting Events To insert an event 1 From the main window select the Edit tab 2 Under Direction select either A B or B A 3 If desired you can select an item from the events table that is near the location where you want to insert an event 4 Press the Insert button ...

Страница 243: ...le to help you place the event but only marker A identifies where the event will be inserted Define the new event location by using one of the following methods Enter a distance value in the Position box and press Move the markers on the trace display For more information on positioning markers see Using Markers to Edit Events on page 225 Marker a Marker A Marker B Marker b ...

Страница 244: ...lated automatically based on the position of the markers Reflectance values are only displayed for reflective event types reflective echo and possible echo 7 Press Insert to create the event or Cancel to return to the events table without making any changes Inserted events are identified with appearing beside the event symbol in the events table of both Edit and Events tabs as shown below Loss and...

Страница 245: ...n change the position as well as the loss and reflectance reflective events only of almost any existing event except launch event You can modify the loss and reflectance values but not its position The launch event position must always remain set to 0 continuous fiber end of analysis merged events Note If you want to modify the attenuation value of a fiber section see Changing the Attenuation of F...

Страница 246: ...g Events To modify an event 1 From the main window select the Edit tab 2 Under Direction select either A B or B A 3 Select the event you want to modify 4 Press the Modify button Note If the Modify button is not available that means you cannot modify events of this type Position of marker A ...

Страница 247: ...odify another event instead press Cancel then change your selection Four markers are available to help you place the event but only marker A identifies where the event will be moved Define the new location by using one of the following methods Enter a distance value in the Position box and press Move the markers on the trace display For more information on positioning markers see Using Markers to ...

Страница 248: ...he position of the markers Reflectance values are only displayed for reflective event types reflective echo and possible echo 7 Press Modify to accept the modifications you have made or Cancel to return to the events table without saving the changes The modified events are identified with appearing beside the event symbol in the events table of both Edit and Events tabs as shown below Loss and ref...

Страница 249: ...nerates the bidirectional measurement automatically to take into account the modifications you have made Almost any element can be deleted from the events table except end of analysis fiber section launch level end of fiber span start span end IMPORTANT The only way to recover deleted items is to reanalyze the trace For more information see Reanalyzing Traces and Regenerating the Bidirectional Mea...

Страница 250: ...rom the main window select the Edit tab 2 Under Direction select either A B or B A 3 Select the event you want to delete 4 Press Delete Note If the Delete button is not available that means you cannot delete events of this type 5 When the application prompts you press Yes to confirm the deletion or No to keep the event ...

Страница 251: ...hose of the bidirectional measurement The application regenerates the bidirectional measurement automatically to take into account the modifications you have made You can change the attenuation value of fiber sections Note If you want to modify events see Modifying Events on page 231 IMPORTANT If you reanalyze a trace all of the modifications made to the fiber sections will be lost and the events ...

Страница 252: ... the Attenuation of Fiber Sections To modify the attenuation of a fiber section 1 From the main window select the Edit tab 2 Under Direction select either A B or B A 3 Select the fiber section that you want to modify 4 Press the Modify button The A and B markers appear in the trace display ...

Страница 253: ...Edit Events on page 225 Note The markers serve only to set the new attenuation value Their actual locations will not be modified Fiber section loss and attenuation are displayed 6 Press Modify to accept the modifications you have made or Cancel to return to the events table without saving the changes The modified fiber sections are identified with in the events table of both Edit and Events tabs a...

Страница 254: ...avelengths The default distance units are the kilometers Note If you select Kilometers km or Kilofeet kft m and ft may appear instead to display more precise measurements Note The attenuation of fiber sections is always presented in dB per kilometer even if the distance units you selected are not the kilometers This follows the standards of the fiber optic industry that provides the attenuation va...

Страница 255: ...the graph background You can display the graph with a black invert color feature or a white background By default the background is white Trace display mode You can choose the way the application will display traces on screen and in reports The available choices are Complete Trace to display the whole trace and full acquisition distance Span to display the trace from the span start to the span end...

Страница 256: ...ing to the item you want to display on the graph OR To hide them clear the boxes 3 Press Apply to confirm the changes then OK to return to the main window The changes are applied automatically To revert to factory default settings 1 From the Main Menu select Setup then select the General tab 2 Press the Revert to Factory Settings button Note Only the parameters from the current tab have been reset...

Страница 257: ... the displayed values If you activated the pass fail test see Setting Pass Fail Thresholds on page 247 span start and span end events will be taken into account when determining the status pass fail of splice and connector loss and reflectance Fiber sections You can display or hide fiber sections in the events table depending on the types of values you want to display For example by hiding the fib...

Страница 258: ...ou can display or hide the comments relative to a specific event Such comments would be displayed in a tooltip along with the details of the event type see Events Tab on page 208 A red triangle appears next to the event number to indicate that a comment has been inserted manually for a specific event Note If you have not selected the Show event comment in tooltip option in the Events setup tab the...

Страница 259: ... 2 Select the boxes corresponding to the item you want to display or include in the table OR To hide them clear the boxes 3 Press Apply to confirm the changes then OK to return to the main window To revert to factory default settings 1 From the Main Menu select Setup then select the Events tab 2 Press the Revert to Factory Settings button Note Only the parameters from the current tab have been res...

Страница 260: ...urrent span start and span end to a unidirectional trace when your reanalyze this trace To save the span start and or span end information or to deactivate the feature 1 From the Main Menu select Setup then select the Events tab 2 Select the Keep span start current position and or the Keep span end current position boxes OR If you prefer not to save the span positions clear the boxes 3 Press Apply...

Страница 261: ...ill be applied to the results of the A B or B A traces as well as the bidirectional measurement with the corresponding wavelength By default the application provides threshold values for the following wavelengths 1310 nm 1383 nm 1390 nm 1410 nm 1490 nm 1550 nm 1625 nm and 1650 nm However if you work with unidirectional or bidirectional files containing other wavelengths the application will automa...

Страница 262: ...Values that are greater than the predefined fail thresholds are displayed in white on a red background in the events table The Pass Fail threshold LED located on the front of the unit will also indicate the status green for pass red for fail Test Default Minimum Maximum Splice loss dB 1 000 0 015 5 000 Connector loss dB 1 000 0 015 5 000 Reflectance dB 40 00 80 0 0 0 Fiber section attenuation dB k...

Страница 263: ...2 From the Wavelength list select the wavelength for which you want to set thresholds 3 Select the boxes corresponding to the thresholds that you want to use and enter the desired values in the appropriate fields Note If you no longer want the application to take into account a particular threshold simply clear the corresponding box Threshold to set Value associated with the threshold to set ...

Страница 264: ...everal other wavelengths proceed as follows 4a Press the Copy to Other Wavelengths button 4b Select the boxes corresponding to the wavelengths for which you want to use the same thresholds Note You can use the Select All button to quickly select all boxes at the same time 4c Press OK to confirm you selection 5 Press Apply to confirm the changes then OK to return to the main window ...

Страница 265: ...evert to Factory Settings button 3 When the application prompts you confirm the modification with Yes All threshold values of all wavelengths are returned to their default values except for thresholds that are associated with custom wavelengths IMPORTANT When you revert thresholds to their default values custom wavelengths will be deleted from the list of available wavelengths except if a file usi...

Страница 266: ...rs can be changed The fiber settings IOR Index of refraction of the displayed trace also known as group index If you modify this parameter the distance measurements for the trace will be adjusted You can enter an IOR value directly or let the application calculate it with the distance between span start and span end you provide Backscatter Rayleigh backscatter RBS coefficient of the displayed trac...

Страница 267: ...des the default minimum and maximum threshold values Note The event detection thresholds are not available when you work with a trace in Telcordia Bellcore non EXFO version 200 format These detection thresholds will also be used when you reanalyze the traces manually Detection threshold Default Minimum Maximum Splice loss dB 0 020 0 010 5 000 Reflectance dB 72 0 78 0 14 0 End of fiber dB 5 000 1 0...

Страница 268: ...ctory settings The fiber settings will be reset according to the current trace and the event detection thresholds will return to fixed default values To modify the trace analysis settings of the selected trace 1 From the main window select the Trace Info tab 2 Under Direction select either A B or B A 3 Press the Trace Analysis Settings button ...

Страница 269: ...r to let the application calculate the IOR value as function of the distance between span start and span end select Fixed length instead then enter the distance value 5 Press Apply to confirm the changes 6 The application may prompt you to confirm whether you want to apply the changes to both unidirectional traces Select the option that better suits your needs 7 Press OK to return to the Trace Inf...

Страница 270: ...t either A B or B A 3 Press the Trace Analysis Settings button 4 Press the Revert to Default Settings button 5 When the application prompts you select Yes to complete the operation 6 Press Apply to confirm the changes 7 The application may prompt you to confirm whether you want to apply the changes to both unidirectional traces Select the option that better suits your needs 8 Press OK to return to...

Страница 271: ...ir complete data you can export them from the bidirectional file see Exporting Unidirectional Traces from Bidirectional Files on page 259 You will then be able to use them from the OTDR application By default the suggested file name is based on the file name of the A B trace If you prefer you can modify the file name of the bidirectional file It is also possible to modify the path to the bidirecti...

Страница 272: ...al files 1 From the Main Menu select File Save 2 From the Save As dialog box select a folder or create one to save your file 3 If desired modify the file name 4 Press Save to confirm IMPORTANT If you specify the name of an existing trace the original file will be overwritten and only the new file will be available ...

Страница 273: ...asurement The files that you export are in native trc format that can be opened with the OTDR application Note Traces in Telcordia Bellcore EXFO version 200 format will also be exported to a native trc format but operations allowed on them will be limited The exported file will contain all the wavelengths that are available in the bidirectional file The application names the exported files as foll...

Страница 274: ...197 OR Open an already existing file see Opening Existing Bidirectional Measurement Files on page 201 2 From the Main Menu select Export 3 Select either Export A B or Export B A 4 From the Save As dialog box select a folder or create one to save your file 5 If desired modify the file name 6 Press Save to confirm The exported trace is now available IMPORTANT If you specify the name of an existing t...

Страница 275: ...e 263 The information you enter is saved along with the bidirectional file only The original A B or B A files will not be modified The information that you enter is specific to each wavelength and direction combination for example the information for A B trace at 1550 nm differs from the information for A B trace at 1625 nm The bidirectional measurement uses the information defined for the A B tra...

Страница 276: ...to confirm your changes then OK to return to the main window The information entered is saved and can be viewed or changed at any time using the same process To clear all the information from the Trace Identification window 1 Press the Clear All button Note The information appearing in the Model and Serial number boxes cannot be deleted 2 When the application prompts you confirm the deletion with ...

Страница 277: ...ch of the events having a fail status with their wavelength Fail values are displayed in red results which comprise test parameters for A B and B A traces bidirectional summary results for events having a fail status and the bidirectional events table Fail values are displayed in red In the case of multiwavelength files bidirectional measurement has just been created but the file has not been save...

Страница 278: ...7 OR Open an already existing file see Opening Existing Bidirectional Measurement Files on page 201 2 From the Main Menu select Export Report 3 From the Save As dialog box select a folder or create one to save your file 4 If desired modify the file name 5 Press Save to confirm IMPORTANT If you specify the name of an existing report the original file will be overwritten and only the new file will b...

Страница 279: ...tional application 2 From Compact ToolBox open File Manager 3 Go to the folder in which you have saved your report 4 Select the report you want to view and press the dial located on the front of your unit image du bouton ENTER OR Double tap the report that you want to view 5 When you have finished simply close the report 6 Close File Manager ...

Страница 280: ......

Страница 281: ...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 liquids are spilled on or into the unit turn off the power immediately disconnect from any external power source remove the batteries and let the unit dry completely WARNING Use of controls adjustments and procedures for operation a...

Страница 282: ... ferrule 2 Moisten a 2 5 mm 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 rotating movement may help 4 Gently turn the cleaning tip one full turn then continue to turn as you withdraw it IMPORTANT If any damage occurs to internal connectors the m...

Страница 283: ...connector and ferrule are perfectly dry 6d Verify connector surface with a portable fiber optic microscope for example EXFO s FOMS or fiber inspection probe for example EXFO s FIP 7 Put the EUI back onto the instrument push and turn clockwise 8 Throw out cleaning tips and wiping cloths after one use IMPORTANT Isopropyl alcohol may leave residues if used abundantly or left to evaporate about 10 sec...

Страница 284: ...at least 2 km of fiber to the OTDR output port 2 Set the distance range at 2 5 km and acquisition time at 180 seconds 3 Measure the deviation between a 10 ns pulse and a 30 ns pulse for each laser The deviation Δ should be between 2 0 dB and 3 0 dB The deviation must be measured in the linear backscatter region Do not measure the deviation near distinct reflections Performance will be affected if ...

Страница 285: ...on the pulse width to the shortest value available and the acquisition time to 15 seconds 3 Evaluate the launch level at 0 km by extrapolating the linear region of the curve The launch level should be located within the launch window light green rectangle appearing on the left side of the Y axis on the graph If the launch level is below this window clean the output connector again retest the fiber...

Страница 286: ...the fiber settings are accurate IOR Helix factor and RBS 2 Set the distance range to less than 2 km the pulse width to 10 ns and the acquisition time to 30 s 3 Take a distance measurement positioning marker A as shown below Note You can also press the Analyze button from the Event pane The analysis should return the right position directly The position of the marker should be equal to the length o...

Страница 287: ... uncertainty as shown below Use A and B markers in the Measure pane This is the attenuation dead zone If the results exceed the maximum permitted specification refer to the calibration certificate that came with your product performance will be affected A damaged output connector may be the cause The reflectance of the output connector should be below 35 dB to attain an adequate dead zone If refle...

Страница 288: ...t fiber length from that setup In all cases the fiber should have several sections longer than 2 km with no loss greater than 8 dB and with an average attenuation not exceeding 1 dB km Ensure the OTDR port and connectors are correctly cleaned and that the fiber settings are accurate IOR Helix factor and RBS 1 to M reels of fiber Add as needed OTDR 2km or more Fiber End 2km or more 2 km or more 2 k...

Страница 289: ...tive to the noise amplitude which is 5 2 dB If the result falls below the minimum permitted specification refer to the calibration certificate that came with your product you will observe a degradation of performance It could be caused by a damaged output connector If this is the case clean the connector If the problem persists change the output connector If the problem remains even after changing...

Страница 290: ...eflective events with a nominal loss of 0 5 dB should be present Join a series of fiber reels between the OTDR and the variable attenuator for a length of approximately 20 km Join another series of reels to complete the fiber length needed for the test Ensure that the OTDR port and connectors are correctly cleaned Make sure the fiber settings are accurate IOR Helix factor and RBS 1 to M reels of f...

Страница 291: ...on reflective event method represents the amount of attenuation dB between the launch level and a 0 5 dB splice which can be detected and measured to an accuracy of 0 1 dB You can measure it by simply making an acquisition on a fiber with a known attenuation and a known 0 5 dB splice Attenuation between the splice and the launch level is added until the analysis can no longer measure the splice to...

Страница 292: ...terval 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 shorter depending on the intensity of use environmental conditions and unit maintenance You should determine the adequate calibration interval for your unit according to your accuracy requirements Under normal u...

Страница 293: ...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 designed to facilitate dismantling and reclamation For complete recycling disposal procedures and contact information visit the EXFO Web site at www exfo com recycle Recycle or dispose of your product includ...

Страница 294: ......

Страница 295: ...ber under test is shorter than the maximum length the OTDR can measure In multimode fiber testing launch level remains out of the launch window light green rectangle even after cleaning and verifying connection Wrong fiber type selected If you are testing C fiber from the Auto or Advanced main window select MM 50 μm If you are testing D fiber from the Auto or Advanced main window select MM 62 5 μm...

Страница 296: ...age about live fiber error should not appear and the OTDR trace should look normal If you still see the message about live fiber error even if no fiber is connected to the OTDR contact EXFO Never connect a live fiber to the OTDR port without a proper setup Any incoming optical power ranging from 65 dBm to 40 dBm will affect the OTDR acquisition The way the acquisition will be affected depends on t...

Страница 297: ...d not appear and the OTDR trace should look normal If you still see the message about live fiber error even if no fiber is connected to the OTDR contact EXFO Singlemode live fiber testing requires that the integrated power in the test channel corresponding to the filter bandwidth of the SM Live port be as low as possible Any incoming optical power ranging from 65 dBm to 40 dBm will affect the OTDR...

Страница 298: ...upport visit the EXFO Web site at www exfo com To accelerate the process please have information such as the name and the serial number see the product identification label as well as a description of your problem close at hand 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 com Ver Mfg date P N ...

Страница 299: ...e 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 Keep the unit out of direct sunlight Avoid unnecessary shocks and vibrations ...

Страница 300: ......

Страница 301: ... 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 OR STATUTORY INCLUDING BUT NOT LIMITED TO THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE IN NO EVENT SHALL EXFO BE LIABLE FOR SPECIAL INCIDENTAL OR CONSEQUENTIAL DAMAGES IMPORTANT The warranty c...

Страница 302: ...y 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 EUI used with EXFO products are not covered by this warranty This warranty excludes failure resulting from improper use or installation normal wear and tear accident abuse neglect fire water lightn...

Страница 303: ...itions 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 return any package that does not bear an RMA number Note A test setup fee will apply to any returned unit that after test is found to meet the applicable specifications After repair the equipment will be returne...

Страница 304: ... 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 Fax 44 2380 246801 europe service exfo com EXFO Telecom Equipment Shenzhen Ltd 3rd Floor Building 10 Yu Sheng Industrial Park Gu Shu Crossing No 467 National Highway 107 Xixiang Bao An District Shenzhen Chin...

Страница 305: ...esolution m Multimode 0 04 to 2 5 Singlemode 0 04 to 5 Multimode 0 04 to 2 5 Singlemode 0 04 to 5 Sampling points Up to 128 000 Up to 256 000 Distance uncertainty m g 0 75 0 0025 x distance sampling resolution 0 75 0 0025 x distance sampling resolution Measurement time User defined 60 min maximum User defined 60 min maximum Typical real time refresh Hz 3 3 Stable source output power dBm h 1 5 1300...

Страница 306: ... i 2 5 2 5 Visual fault locator optional c Laser 650 nm 10 nm CW Pout in 62 5 125 μm 1 5 dBm 1 4 mW n a j Reflectance dB c 2 2 GENERAL SPECIFICATIONS Module FTB 7300E FTB 730 Size H x W x D 97 mm x 25 mm x 260 mm 3 13 16 in x 1 in x 10 in 130 mm x 36 mm x 252 mm 5 1 8 in x 1 7 16 in x 9 15 16 in Weight 0 55 kg 1 2 lb 0 65 kg 1 4 lb For complete details on all available configurations refer to the ...

Страница 307: ...1 Loss resolution dB 0 001 0 001 0 001 Sampling resolution m 0 04 to 5 0 04 to 5 0 04 to 5 Sampling points Up to 256 000 Up to 256 000 Up to 256 000 Distance uncertainty m e 0 75 0 001 x distance sampling resolution 0 75 0 001 x distance sampling resolution 0 75 0 001 x distance sampling resolution Measurement time User defined 5 sec minimum to 60 min maximum User defined 5 sec minimum to 60 min m...

Страница 308: ...Up to 256 000 Distance uncertainty m e 0 75 0 001 x distance sampling resolution Measurement time User defined 5 sec minimum to 60 min maximum Typical real time refresh Hz 4 Stable source output power dBm f 1 7400E 0023B Visual fault locator optional b Laser 650 nm 10 nm CW Pout in 62 5 125 μm 1 5 dBm 1 4 mW Notes a For complete details on all available configurations refer to the Ordering Informa...

Страница 309: ...m 0 04 to 5 Sampling points Up to 256 000 Distance uncertainty m e 0 75 0 001 x distance sampling resolution Measurement time User defined 5 sec minimum to 60 min maximum Typical real time refresh Hz 4 Stable source output power dBm f 5 Visual fault locator optional b Laser 650 nm 10 nm CW Pout in 62 5 125 μm 1 5 dBm 1 4 mW Notes a For complete details on all available configurations refer to the ...

Страница 310: ......

Страница 311: ...ent has its own symbol Each type of event is represented by a graph of a fiber trace which illustrates the power reflected back toward the source as a function of distance An arrow points to the location of the event type in the trace Most graphs show one complete trace that is an entire acquisition range Some graphs show only a portion of the entire range to view events of interest more closely ...

Страница 312: ...ng of the events table at a specific event along the trace Span End The Span End of a trace is the event that marks the end of the fiber span By default the Span End is placed on the last event of a tested fiber and is called the end of fiber event You can also make another event the end of the span you want to focus your analysis on This will set the end of the events table at a specific event al...

Страница 313: ...an the fiber length The fiber end was not detected because the analysis process ended before reaching the end of the fiber The acquisition distance range should therefore be increased to a value greater than the fiber length There is no loss or reflectance specified for continuous fiber events Reflected power dB Continuous fiber Distance km ...

Страница 314: ...e to get to the end of the fiber The analysis ended before reaching the end of the fiber because the signal to noise ratio was too low The pulse width should therefore be increased so the signal reaches the end of the fiber with a sufficient signal to noise ratio There is no loss or reflectance specified for end of analysis events Reflected power dB Distance km ...

Страница 315: ...s often caused by splices macrobends or microbends in the fiber A loss value is specified for non reflective events There is no reflectance specified for this type of event If you set thresholds the application indicates a non reflective fault in the events table whenever a value exceeds the loss threshold see Setting Pass Fail Thresholds on page 53 Reflected power dB Distance km Non reflective ev...

Страница 316: ... quality fusion splices or cracks Normally loss and reflectance values are specified for reflective events When the reflective spike reaches the maximum level its top may be clipped due to the saturation of the detector As a result the dead zone minimum distance for making a detection or attenuation measurement between this event and a second nearby may be increased If you set thresholds the appli...

Страница 317: ...having different fiber backscatter characteristics backscatter and backscatter capture coefficients A loss value is specified for positive events The loss specified does not indicate the true loss of the event The true loss has to be measured by performing bidirectional fiber measurements and bidirectional analysis Reflected power dB Distance km Positive event ...

Страница 318: ...is plotted using least square approximation to fit all trace points in the linear area between the first and second detected events The straight line is projected toward the Y axis dB until it crosses the axis The crossing point indicates the launch level in the events table indicates that the launch level is too low Reflected power dB Distance km Launch level event position Second event Launch le...

Страница 319: ...ce equals the total fiber length Detected events are distinct even if they cover more than one point on the trace A loss value is specified for fiber section events No reflectance is specified for this type of event The attenuation dB distance in kilometers is obtained by dividing the loss by the fiber section length Reflected power dB Distance km Fiber section Fiber section ...

Страница 320: ...ubevents composing it Reflective events may indicate the presence of connectors mechanical splices or poor quality fusion splices or cracks Non reflective events may indicate the presence of splices splitters or bendings A reflectance value is specified for all merged events and indicates the maximum reflectance for the merged event A reflectance value is also displayed for each reflective subeven...

Страница 321: ...ough least square approximation trace points in the linear area following the second event If there were more than two merged events this line would be plotted in the linear area following the last merged event This line is then projected toward the first merged event The total loss Δ dB equals the power difference between the point where the first event begins point A and the point on the project...

Страница 322: ...or false negative results When evaluating event status against thresholds we are faced with two possible conditions All event types are tested reflective non reflective Only some event types are selected for example you could decide not to test reflective loss The third case would be to test none of the event types which means the same as not wanting to know the status of the events Merged sub eve...

Страница 323: ...han the sum of the number of sub events of a type multiplied by the threshold value for this event type then the event status is Fail If the event loss is in between since it is not possible to know exactly the weight of a sub event in the merged event the global event is considered to have a status of Pass If the merged event loss is smaller than or equal to 1 2 then the status is Pass Otherwise ...

Страница 324: ...f the global event loss is less than or equal to the smallest threshold value a value that is tested of course we are sure that the merged event status is Pass Otherwise we cannot know so the status of the event is Unknown In our example if we suppose that the you chose not to test non reflective losses then the analysis would be done as shown below Pass Unknown 0 0 5 1 2 Pass Unknown ...

Страница 325: ...hat status it cannot be set back to Pass or Unknown Whenever an event status is Fail so is the trace status If an event status is Pass the trace status can change from Unknown to Pass If an event status is Unknown the trace status remains the same In other words the event in this case has no influence on the trace status To avoid Unknown statuses do not unselect loss thresholds individually ...

Страница 326: ...ward the end connector It is then reflected back to the OTDR The application interprets this new reflection as an echo because of its characteristics reflectance and particular position with respect to other reflections The distance between the second connector reflection and the end connector reflection is equal to the distance between the end connector reflection and the echo There is no loss sp...

Страница 327: ...gain into the fiber It then reaches the third connector a second time and is reflected once more to the OTDR The application would therefore detect a reflective event located at twice the distance of the third connector Since this event is almost null no loss and since its distance is a multiple of the third connector distance The application would interpret it as a possible echo A reflectance val...

Страница 328: ......

Страница 329: ...fail 53 247 analyzing a trace see analysis after acquisition analyzing traces 154 application main window 196 application starting 19 Att column in events table 114 209 210 attenuation fiber section 53 247 fiber section threshold 53 247 LSA measurement method 172 measurement 172 reflectance 174 two point measurement method 172 Auto mode acquiring traces 35 selecting test wavelength 33 37 setting f...

Страница 330: ... date of trace acquisition 182 183 decrementation file name 24 78 default trace name 24 78 definition of the OTDR 1 deleting events 144 235 delimiting fiber span 128 243 description of event types 297 detecting module 16 detection reflective events 154 dial Distance 45 moving 47 Pulse 45 Time 45 disappearing marker 165 displaying fiber sections 128 243 fiber span 122 injection level in events tabl...

Страница 331: ...al interface see EUI F Fault finder mode acquiring traces 75 Fault Finder testing 75 fault notification for events 248 fiber attenuation 114 209 210 identifying by name 24 78 181 identifying visually 189 section attenuation 53 247 sections display 128 243 span length 134 type in Trace Info tab 134 see also fiber span 58 fiber ends cleaning 22 fiber parameters setting 133 fiber parameters setting d...

Страница 332: ...erage for fiber span 134 average splice 134 213 connector 53 247 connector threshold 53 247 cumulative for fiber span 134 213 in events table 113 210 measurement 167 measurement positioning markers 171 modification 138 231 non reflective events average 134 213 span threshold 53 247 splice 53 247 splice threshold 53 247 LSA measurement method definition 172 vs four point 167 vs two point 172 M macr...

Страница 333: ... mode 62 trace display 88 126 241 pass fail 110 111 206 pass fail message display 55 pass fail test disabling 54 248 enabling 54 248 when to perform 54 photodetector 8 Pos in event table 209 210 position event 209 210 precision trace 49 printing reports 184 product identification label 284 specifications 291 pulse dial 45 in Trace Info tab 134 setting width 45 width unit 240 pulse time in Trace In...

Страница 334: ...ratio 46 single wavelength trace file bidir analysis 197 software see application source accessing 189 operating 189 source see also laser source function overview 189 span length threshold 53 247 loss threshold 53 247 span end description 298 effect of setting on events table 58 153 220 setting in memory 246 span position updating 153 217 span start description 298 effect of setting on events tab...

Страница 335: ...nfo tab 134 touchscreen keyboard activating 87 102 trace accuracy 49 acquisition in Advanced mode 37 acquisition in Auto mode 35 acquisition in Fault finder mode 75 acquisition in Template mode 66 analysis 151 215 analysis detection thresholds 148 253 autonaming 24 78 changing default name 24 78 color in trace display 107 compatibility between ToolBox versions 178 editing buttons 115 export format...

Страница 336: ...210 of event 113 209 210 U unchangeable events 138 231 undeletable events 144 235 unit recalibration 278 UPC connectors detecting 154 updating span position 153 217 using light source 189 V VFL 1 Hz pulsed output 192 continuous wave output 192 using 189 view graph 205 linear 108 summary 110 111 206 visual fault locator see VFL W warning thresholds 55 warranty certification 288 exclusions 288 gener...

Страница 337: ... Indicates that this toxic or hazardous substance contained in at least one of the homogeneous materials used for this part is above the limit requirement in SJ T11363 2006 嫷䯉年㦘㹡㦘䓸德咂年捷ↅ䤓㩟德㧟㠨䤓摞怔 SJ T11363 2006 㪖屓䤓棟摞尐㻑ᇭ Part Name 捷ↅ 䱿 Toxic or hazardous Substances and Elements 㦘㹡㦘䓸德侯 Lead 杔 Pb Mercury 㻭 Hg Cadmium 椣 Cd Hexavalent Chromium ↆ杻 Cr VI Polybrominated biphenyls 䅃勣啾 PBB Polybromin...

Страница 338: ...MARKING REQUIREMENTS 㪖㽷尐㻑 Product ℶ Environmental protection use period years 䘾㔳䞷㦮棟 Logo 㪖 This Exfo product 㦻 EXFO ℶ 10 Batterya 䟄㻯 a a If applicable Ⱁ㨫抑䞷ᇭ 5 ...

Страница 339: ...51 Chin Swee Road 03 29 Manhattan House SINGAPORE 169876 Tel 65 6333 8241 Fax 65 6333 8242 EXFO CHINA Room 2711 Trade Center No 4028 Jintian Road Futian District Beijing Global Trade Center Tower C Room 1207 36 North Third Ring Road East Dongcheng District Shenzhen 518035 P R CHINA Tel 86 755 8203 2300 Fax 86 755 8203 2306 Beijing 100013 P R CHINA Tel 86 10 5825 7755 Fax 86 10 5825 7722 EXFO SERVI...

Отзывы:

Нет отзывов