BOBCAT OTDR USER`S MANUAL
Contents
1. DB KM dB per Kilometer if in KM unit of measure and DB KF if in Kilo Feet unit of measure This is the calculated loss per Km or Kf from the end of the dead zone of the previous event to the beginning of the current event TYPE Event Type is the type of event or the ORL measurement If the event is a splice with no reflection splc will be displayed and if the event contains a reflection the ORL value will be displayed This is a settable threshold for the Pass Fail feature E End Of Fiber at the bottom of the table will display location for the suspected end of fiber in the KM column N A in the Splice Column and Link Loss in the 2 POINT column Link Loss may be set as a Pass Fail Threshold The DB KM or KF is the calculated dB loss per Km or Kf for the full link and the TYPE column will display the word Link To the right of the table is a scroll bar which will be active if the amount of events exceeds one page and below the scroll bar is an indication of what page is display per number of pages Below the page number information are the parameter settings for the currently highlighted trace Sensitivity Settings There are three levels of sensitivity while in the event table The sensitivity is set via the Sense soft key Use the Menu button to access the Soft Keys and use the Directional buttons to highlight the Sense key Press the Select button to cycle through HI for events with loss down to approximately 0 1dB Medium M2. FIBER INSTRUMENT SALES ING BOBCAT OTDR USER S MANUAL Avoid exposure Laser Radiation Emitted from the Aperture This product conforms to CDRH standards for laser product Per 21 CFR 1040 10 amp 1040 11 Revision E 2 21 2013 Revision E 2 21 2013 Table of Contents SECTION 1 0 OTDR Quick Stare ine aa ee ea ae Bu eurer 20 INFO U LO ee en 3 0 Preparation for Use uuu0sunn0nonnunnnnunnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnunnnnen 3 1 Inspection 3 2 Identification Configuration 33 Power Requirements 3 4 Laser Safety 40 BOBCAT DGS Crile gaia oto eee ee ee ee einen 4 1 Mechanical Enclosure Packaging 4 2 Physical Front Panel Top Panel Home Menu 5 0 Features Description Operation ccccsseee ese ee eeee ee ee eee naeeeneeeneeeeneaeeneeeenaeenaes 5 1 Battery Level Power Indicator 5 2 Help 5 3 USB port 5 4 VFL Visual Fault Locator 6 0 Tool MENU chp ts etc etn A er le wre tebe irae an ar al 6 1 Tool Menu Description 6 2 Accessing the Tool Menu 6 3 Tools Menu Functions Set Viewable Measurements Wavelength Filter Pass Code Protection Set Splice Zones Power Save Unit of Measure Cursor Lock Baud Rate Screen Shot Trace Smoothing Date Time Color Scheme Brightness Sound Set Language Enter Calibration 7 0 OTOR Oper ston ernannte 7 1 Key Pad Operation 1 2 Enter Exit OTDR Function 1 8 Trace Display 17 4 Auto Test Range Finder Construction Mode 7 5 Manual
3. Finder test press the Autotest button The first time Autotest is press upon power up a dialog box will be display to set the function of the button Use the directional buttons to move between the Range Finder and Construction Mode Press the Select button once the desired function is highlighted To change the function once set in a user session press and hold the Autotest button and the dialogue box will be displayed again For Range Finder mode set the wavelength to be tested To set the wavelength press the Menu button move to the Lambda icon and use the Select button to cycle to the desired wavelength Press the Autotest button the unit will set the average time to short starts a scan and flashes Auto in the pulse width and range parameters When Auto stops flashing the unit has set the pulse with and range and completes the scan 10 Revision E 2 21 2013 ig gt 7 9 Construction Mode This is useful when a large number of fibers need to be tested with the same settings at multiple wavelengths To operate in Construction mode set the Autotest button to this mode as described above The Construction Mode tests up to two wavelengths at one time displays the two traces and saves the traces to the next two available storage locations Follow these procedures to test in Construction mode set The Wavelengths Set the wavelengths to be tested by pressing the Menu button use the directional buttons to highlight the Tools
4. icon and pressing Select Use the directional buttons to highlight the Set Wavelength Filter tool and press Select Grayed out wavelengths are turned off The wavelengths in black text are active To shut off or turn on wavelengths use the directional buttons to highlight the wavelength and press the Select Button To complete the process use the directional buttons to highlight Save and press Select Press Menu again to close the tools dialogue box Set Test Parameters Check the Average Time Pulse Width and Range to ensure they are set properly Refer to section 7 4 for instructions on setting these parameters Note Real Time is not recommended as an averaging time for Construction mode Set The File Name It is necessary to set the base file name prior to starting the test To establish the file name press the Menu button use the directional buttons to highlight the File Management icon and press Select Scroll to a Free file location at the beginning of the section with enough empty storage locations to save all the files for a set of tests and press Select Name the file by using the directional buttons to display the desired letter or number and press Select to move to the next Character Do not press select to enter the last character Once it is displayed press the Menu button and Save Changes soft key will be highlight press Select or use the directional buttons to highlight Discard Changes and press Select All future files will use
5. move to the Rename soft key Press the Select button and the first character will be highlight in the file name Refer to Saving a Trace above for file naming procedure When desired changes are made press the Menu button again and select Save Changes or Discard Changes Viewing Saved Trace To view a saved trace from internal memory use the directional buttons to highlight the desired trace and press the Select button The OTDR will return to the trace view with the select trace displayed and directly below the trace will be the trace name and the date time stamp 18 Dual Trace Note To compare two traces they must have the same Range I settings With a trace displayed either a trace just taken or one from file storage Enter the file management mode highlight the trace to be placed in the background press the Menu button use the directional buttons to move to the Dual soft key and press Select The background trace will be displayed in green All the measurement information displayed will be derived from the main trace If the trace for the background does not have the same range as the main trace a range mismatch message will be displayed Press the Select button to clear the message To exit the Dual Trace mode start a new scan or open a new main trace from the file management Marking Traces for Mass Coping and Deleting When in the File Management System use the directional buttons to highlight the first trace to be copied or
6. Locator Tools Menu To open the Tool Menu press the Menu button and use the directional buttons to highlight the Tools icon and press the Select button All parts of the Tool Menu are accessible though there are no operational setting for the LTS located in the Tools Menu View Graph Selecting the View eye icon will change to the Graph Mode For More information on the graph mode see section 12 6 To revert back to the normal power meter mode press Select a second time with the View Icon highlighted 25 Revision E 2 21 2013 ig gt Lambda Wavelength Selection Highlighting and selecting the A Icon will display the Wavelength Selection menu Use the directional buttons to highlight the wavelengths to be select for use with the light source and power meter and press the Select button to toggle them off and on The selected wavelengths will be the only wavelengths tested in the auto test mode and the only ones available when cycling through the light source and power meter soft keys Highlight Save Selection at the bottom of the menu and press the Select button to save the setting and return to the Loss test Set mode File Download File Download is used to send the save Loss Test to a PC Once the OTDR is connected to a computer with the certification software running enter the menu mode and highlight the File Download icon When directed to do so press the Select button to immediately start a download to the computer vi
7. is designed to be used as an installation troubleshooting and maintenance tool The Bobcat OTDR is a full featured Optical Time Domain Reflectometer but unlike OTDRs that cost thousands of dollars more the Bobcat OTDR is very simple to operate To understand more about OTDR operation please review the FIS Fiber Optic Lab Manual section 10 OTDR Theory and Use or consult with our knowledgeable technical support staff The Bobcat OTDR measures distance and loss of fiber links up to 240Km by launching an optical pulse down one end of the fiber and analyzing the returned energy in time or distance from reflections The Bobcat OTDR uses an advanced high speed embedded controller and display processor with proprietary technology to analyze store and average the fiber trace data in the quickest time This high speed processing engine allows the user to make distance and loss measurements immediately after energizing the instrument With its advanced Event Table Splice Loss Mode and dB Km Mode it also can assist the user in interpreting major events such as bad splices connections or broken ends Minor perturbations along otherwise normal fiber links can also be detected using a simple moving cursor approach in Splice Loss Mode Complex return signals with many major or minor events can be analyzed by the Bobcat OTDR then stored away for archiving and later retrieval As with any OTDR to assist in obtaining reliable consistent measurements the user m
8. mode use the directional buttons to move to the Red Delete Icon and press the Select button This will delete all the measurements of the displayed storage memory location Note There is not warning or confirmation necessary to delete one memory location To delete the all the memory locations at one time follow the procedure above however do so on and empty location Note A loss measurement of is not empty if there is a wavelength displayed to the right That would be a null measurement An empty location is with no wavelength displayed to the right When the Delete icon is select on the empty location a Confirm dialog with Delete all files will be displayed and the option to Delete or Cancel the action Press the Select button with the desired action highlighted Quick File Locator To quickly move through the loss storage locations enter the Menu mode use the directional buttons to move to the TRC disc icon and press Select The Memory location at the bottom of the display will be highlighted Press the Select button to isolate the focus on the thousands position Use the Directional buttons to make changes Press the Select button again to move the focus to the hundreds position and repeat this procedure until the desired storage location is found Using the directional buttons when all the digits are highlighted will move thought the positions one at a time as normal Press the Menu button again to exit the Quick File
9. on Pass Code Protection The BOBCAT may be protected from unauthorized use with a 4 digit pass code Enter the Tools Menu use the directional buttons to move to the Pass code Protection tool and press the Select button Use the Directional buttons to set the first digit from O to 9 and press Select Continue until all four positions are entered Pressing Select on the last digit will move the focus to Enter or Cancel press Select again set the pass code or use the Directional buttons to highlight Cancel and press Select to abandon any changes Contact FIS technical support if your code is lost for a master pass code Set Splice Zones Refer to section 7 6 for full instructions on set Splice Loss Measurement Areas Power Save The Bobcat OTDR incorporates a Power save feature that allows for maximum utilization of the battery life If set to ON the unit keeps track of the keypad activity and if no key presses are detected for a period of approximately 15 minutes the unit will automatically turn itself off storing the current mode settings To turn the feature on or off highlight the Power Save tool and press the Select button Unit of Measure To toggle between Kilometer Km Kilo feet Kf or Mile Mi press Select button while the Unit of Measure tool is highlighted Cursor Lock The OTDR cursors may be locked for accurate measurements To lock the cursors use the directional buttons to highlight the Cursor Lock tool and pr
10. over lapping any other events Setting Basic Splice Loss Measurement Areas The splice loss areas around the cursors are adjustable This is accomplished by entering the Menu mode and using the directional buttons to highlight the SPL Icon Press Select and the focus of the directional buttons changes to the splice loss measurement area before and after the Active cursor It is necessary to set these areas in clear backscatter to acquire the most accurate measurements The measurement areas cannot include other events such as reflective or splice events The measurement area may be expand or decreased by using the Select button to toggle through the trailing end of the measurement area before the cursor or the leading and trailing ends of the measurement area after the cursor The selected point is indicated by an arrow and the size may be changed with the use the directional buttons To escape this mode press the Menu button again and the focus will be back on the menu bar Setting Least Squares Approximation LSA Splice Loss Measurement Areas The splice loss areas around the cursors are adjustable This is accomplished by entering the Menu mode and use the directional buttons to highlight the View Icon A box will be drawn around the splice loss measurements Use the Directional buttons to toggle the measurement between Splice Loss LSA Splice Loss or off It is necessary to set the LSA areas in clear backscatter to acquire the most accurate mea
11. pulse width automatically changes the range setting to ensure proper measurement parameters are maintained example if the unit is in short range at 2 meters when the pulse width is changed to 10m the range will change to 4Km which is the short range for the 10m pulse width Changing this setting will also initiate the scan process Range Use the directional buttons to highlight the RNG icon and use the Select button to toggle between the two ranges available per pulse width Changing this setting will also initiate the scan process Viewing a Trace Zoom There are five zoom levels 1x 2x 4x 8x and 16x The current level is indicated next to the soft button at the top of the display There are two methods to change the zoom level The soft key on the top of the display may be used to cycle through the zoom levels by entering menu mode use the directional buttons to highlight the Zoom soft key and using the Select button to cycle through the zoom levels or simply pressing the Zoom Button Note The values per division change with each change of the zoom level Zoom Bar AT the bottom of the trace is a Zoom Bar This represents the entire range of the trace being viewed The green portion within the area represents the amount of the trace that is being viewed while the zoom function is being used In zoom level 1 the green portion will fill the Zoom bar area meaning the entire range of the trace can be viewed and in Zoom level 2 the gr
12. selecting the wavelength the Auto Test feature will start and set an appropriate pulse width and range automatically If approximate fiber length is known Use the directional buttons to move to ALG To set the averaging time R T for real time Short for a 10 second average time or Long for a 5 minute averaging time FJ To set the Pulse width select 2m for fibers up to 4 kilometers 10m for fiber up to 16 IU_ kilometers 100m for fibers up to 64 kilometers or 1k for fibers up to 240 kilometers ENG Set the range 1k or 4k for 2 meter pulse width 4k or 16k for 10 meter pulse width 16k or 64k for the 100 meter pulse width or 64k or 256k for the 1k pulse width To manually start a scan Press BE while the unit is idle To stop a scan Press while the unit is scanning To control the cursors Press Menu to exit the Menu mode and use the Directional buttons to move the active cursor To view the Event table Press Menu to enter Menu mode and use the Directional buttons to highlight the Show Event soft key and press the amp button to change to the event analysis mode Revision E 2 21 2013 2 0 Introduction The Bobcat OTDR is the newest in the line of low cost portable Optical Time Domain Reflectometers with the core functions required to measure optical fiber from one end during installation repair and verification The Bobcat OTDR is equipped with a 4 TFT color graphic presentation of fiber loss vs distance
13. the OTDR or VFL unit while they are energized to do so will expose the user to laser radiation and could result in personal injury or instrument damage WARNING Before connecting to a patch cord or fiber under test be certain the fiber has no active optical sources or instruments connected to the other end Skin or eye damage could result from other high power sources e g EDFAs or instrument damage could occur voiding the warranty 3 Revision E 2 21 2013 ig gt 4 0 BOBCAT Description 4 1 Mechanical Instrument Enclosure The Bobcat OTDR is packaged in a rugged housing which is further protected with a rubberized boot Although the front panel is weather resistant care must be taken to avoid liquids and contaminants around the fragile optical electrical connectors and the glass display Use a mild cleaning agent and damp soft cloth to clean the panels and the outside case See the maintenance section to clean the optical connector NEVER open the instrument for cleaning Return to the factory for servicing if necessary Bobcat OTDR Packaging The instrument is shipped in a protective cardboard container universal charger with interchangeable mains FC ST and SC interchangeable fiber adapters USB Cable and a CD with Windows compatible software and this manual Save the protective packaging for storage and shipment 4 2 Physical Front View Display te Be Left Right Up Key Pad Select Down Directional i n
14. three easily interchangeable adapters per port ST SC FC To change an adapter remove the two screws that hold the adapter in place pull the adapter straight up from ferrule It is suggested that you clean the exposed ferrule with appropriate cleanser and lint free wipe anytime you replace the ferrule NOTE When replacing the adapter with one that does not have a chained protective cap use the small screw in place of the larger screw that retains the end of the chain to the adapter base 31 Revision E 2 21 2013 14 0 Specifications Specifications 850 1300 1310 1550 20nm 27 26dB MM 32 30dB SM 20 10 000 ns km kf mi Wavelength Dynamic Range Pulse Width Units of Measurement Event Dead zone Attenuation Dead Zone Resolution Distance Range Typical Real time Refresh Rate Group Index of Refraction GIR Linearity Memory Capacity Memory Type Connector Styles 25 64m 1 64km MM 1 240km SM 4 Hz 1 000 2 000 05 dB dB 1000 Internal FC ST SC Interchangeable Visible Light Source QIN Laser 650nm 5nm Class IIFDA21 CFR1040 10 amp 1040 11 IEC 825 1 1993 2 5mm Universal lt 1mW Max Power Meter Specifications Emitter Type Wavelength Laser Safety Class Connector Type Output Power 0 18 dB under reference conditions 0 25 dB from 0 to 65 dBm 0 35 dB from 0 to 5 dBm and from 65 to 77 dBm Light Source Specifications Single mode Multimode 850 1300 1310 1550
15. 1625 nm 20nm 0 dBm 3dBm 1625nm Class Safety Per FDA CDRH and IEC 825 1 Regulation CW 270 Hz 1000 Hz 2000 Hz General Specifications Fiber Type Wavelengths Output Power Laser Safety Classification Modulation Modes Universal Dimensions without rubber boot 7 62 L x 3 88 W x 1 56 H 194mm L x 99mm W x 40mm H 20 to 60 C 10 to 50 C Universal Battery Charger w US UK Continental Europe and Australian Plugs Interchangeable FC ST and SC Adapters Windows Telcordia SR4731 Software Rubber Boot Specifications are subject to change without notice ig gt Revision E 2 21 2013 15 0 15 1 15 2 15 3 Warranty Repair Trouble Shooting Warranty Information This product including all mechanical electrical and optical parts and assemblies are unconditionally warranted to be free of defects in workmanship and material for a period of one 1 year from the date of delivery This warranty does not apply to expendable parts such as batteries nor to any instrument or component which has been subjected to misuse alteration or fiber connector damage It is the customers responsibility to understand all the instructions and specifications prior to operating this instrument This warranty does not extend to any loss or damage consequent to the failure of the warranted product Repair If repair is required simply call Fiber Instrument Sales 1 800 500 0347 for return instructions and a RMA numbe
16. 2013 7 0 7 1 OTDR Operation Key Pad Power button turns the unit on and off Hold for 1 second AutoTest Scan Select This key will start a scan or stop the current scan AutoTest Fig 7 1 This key operates Range Finder or Construction Mode The Range Finder mode momentarily checks test conditions and starts a scan at the wavelength selected by the user but allows the OTDR to determine the pulse width and range parameters This test will flash Auto in the Pulse Width and Range settings until the instrument has determined the best setting and displays the test parameters on the display The Construction Mode is used to automatically save and display dual traces The first time Autotest is press upon power up a dialog box will be display to set the function of the button To change the function once set in a user session press and hold the Autotest button and the dialogue box will be displayed again Menu Toggles between the Trace Mode where the focus of the directional buttons and the Select Button are on the active cursor and the Menu mode where the directional buttons moves through the Soft Key Menu and the Icon Bar A B Toggles between A and B as the active cursors foom Selects the Zoom level each press increments through the levels of 1x 2x 4x 8x and 16x While in Trace Mode the Select button will move the Active cursor to the next event While in Menu Mode the Select b
17. Bm 6dBm 1625 This method of measurement does not take into account the launch condition thus the manual method of testing should be used when highly accurate measurements are required such as when testing the loss of an individual connector The Auto Test annunciator will be displayed during Auto Test loss measurements Two or more loss measurements are best viewed in the Zoom mode where all the selected wavelengths will be display at one time on the display 27 Revision E 2 21 2013 12 3 12 4 12 5 Loss Test Set Light Source Operation Energizing Light Source The lasers are initially in the off state when the LTS is launched Enter the Menu mode and use the Directional buttons to highlight the Source soft key Pressing Select will energize the available wavelengths in sequence If used with a compatible test set or a companion OTDR The light source will transmit the wavelength information automatically to the receiving unit which then changes the power meter wavelength setting to correspond to the wavelength of the light source For compatible light sources or test sets please contact your FIS sales associate Modulating Light Source Change the modulation of the light source by entering Menu mode and use the directional buttons to highlight the 1000Hz and 2000Hz The rate will be displayed directly under the Modulation soft key Note that when measuring average power of the lasers the output will drop by exactly 3 01 dB as
18. Disc Press the Select button to enter the file management system Traces will be labeled from 000 to 999 The file names are limited to 8 characters with a suffix To close the File Management System press the Menu button use the directional buttons to highlight the Return soft key and press Select To the right of the file table is a use the scroll bar which will be active if the amount of traces exceeds one page and below the scroll bar is an indication of what page is display per number of pages Below the page indicator are the parameters for the highlighted trace file File Management Display Storage mate Default 335 A995 Default 599 2921100 Default 168 3 Default 030 1ai Default 181 31 Default 031 i 2 Default 102 Default 032 1a2 Default 103 33 Default 093 14 Default 104 3 Default 105 95 Default a95 1a6 Default 106 3 Default 197 srlDefault 897 _ Free 892 sajperaule e98 3 pe DJ File Name 31318 iT Ha Parameters of Trace Preview Highlighted Trace Page of Total Number of Pages Soft Keys Return Copy Marne Del Mark Dual Notes LSE Fig 9 2 18 Revision E 2 21 2013 9 3 9 4 9 5 9 6 9 7 Saving a Trace There are two methods to save traces The first is the Quick Save method described in section 7 8 The second method is to enter file management With a trace on the display press the Menu button use the directional buttons to move to the File Management i
19. LSA area and cursor are set The LSA area and cursor are The LSA area and cursor are too early The right most green set properly The green LSA set too late The left most LSA indicator line is not over indicator line is over laying the green LSA indicator line is not laying the back scatter of the back scatter of the trace over laying the back scatter of trace properly The scale here is properly The scale here is 1 4 the trace properly The scale 1 2 dB per grid division This dB per grid division here is 2 dB per grid division event should show a loss of This event should show a loss approximately 1 40dB of approximately 1 40dB Unit of Measure The distance unit of measure may be either displayed in Kilometer Km Kilo feet Kf or Miles Mi To change the setting enter the menu mode use the directional buttons to highlight the Tools icon and press the Select button Use the directional buttons to move to Unit of Measure and use the Select button to toggle between Km and Kf Press the Menu button to return to the trace display Quick Save Recall Quick Save To use quick save press the Menu button use the directional buttons to move to the Save soft key and press the Select button The trace will be saved to the storage location shown The file will be stored with the same base file name as the last save stored trace If the storage location indicated already contains a file the user will be prompted to either Overwrite the loca
20. Scan is required for smoothing to be accomplished If a long scan is interrupted after 10 seconds the smoothing will be accomplished Minimum smoothing is instantaneous with a lesser effect Maximum smoothing requires approximate 1 2 seconds to complete Date Time The OTDR applies a time date stamp to the saved files The time and date are set at the factory with a MM DD YY date and 24 hour format clock To change the date and time highlight the Time Date tool and press the Select button A dialog box with the settings will be displayed Use the directional buttons to change each segment use the Select button to move between segments and then to Save Redo Cancel Use the directional buttons to select Save Redo or Cancel then press the Select button again to complete the process Color Scheme To change the color scheme press the Select button while the Color Scheme tool is highlighted and the display will cycle through the six preset color schemes Brightness The Display has a high and low brightness setting To toggle between the two settings highlight Brightness tool and use the Select button to toggle between the two settings sound The speaker may be turned on or off as desires To toggle sound on and off highlight the Sound tool and use the Select button to toggle the sound on and off Set Language Press the Select button to toggle between English and Chinese Enter Calibration This tool is for factory use Revision E 2 21
21. Scan Settings Index or Refraction IOR Wavelength Average AVG Pulse Width Range Revision E 2 21 2013 76 Viewing Trace Zoom Zoom Bar Cursor Movement Cursor Lock 1 1 Loss Measurement Definitions Setting Basic Splice Loss Areas Setting Least Squares Approximation LSA Splice Loss Measurement Areas 7 8 Unit of Measure 7 9 Quick Save Recall OA EVent Analys s essen ee ee ame ee ee a ae eher ee een ae ee nee 15 8 1 Enter Event Analysis 8 2 Event Table 8 3 Table Column Definitions Event Number P F Pass Fail KM Unit of Measure Splice 2 Point DB KM Type E End of Fiber 8 4 Sensitivity Settings 8 5 Pass Fail Setting 90 FE Management cu ea aaa en mine en aan a ana Zaun erneuern ee ee 18 9 1 Entering File Management System 9 2 File Management Display 9 3 Saving a Traces 9 4 Renaming Traces 9 5 Viewing Saved Traces 9 6 Dual Trace Trace Overlay 9 7 Marking for Mass Copying or Deleting 9 8 Adding Default notes 9 8 Copying Traces 9 9 Deleting Traces 10 0 Application information unuununnunonnnnnnnnnnnnnnunnnnununnnnnnnnnunnunnnunnnnnnnnnnnnnnnnnnnnnnnnnunnnnunnnnnnnn 21 11 0 Loss Test Set Description serien 22 11 1 Entering Loss Test Set Operation Mode 11 2 Key Pad Operation 11 3 LTS Display LTS Measurement Screen LTS File Storage Access Screen LTS Zoom Screen LTS Graph Screen 11 4 Soft Keys Source Power Meter Modulation II Revision E 2 21 2013 11 5 Loss T
22. a Buttons Optical Time Domain 3 Reflectometer C Fig 5 1 4 Revision E 2 21 2013 Physical continued VFL or OTDR ond Port OTDR Port Top Plate Charge Indicator Power Meter Port USB PC Power Jack Fig 5 2 Home Menu FIBER INSTRUMENT SALES INC Loss Test Set Visual Fault Icon Locator Icon OTDR Icon Version gt Number Revision E 2 21 2013 9 0 9 1 9 2 5 3 5 4 Feature Description Operation Battery Level Power Indicator The bottom right hand corner of the screen shows the battery level and charge indicator In the final hour of operation the battery will change to red A warning indicator will sound a few minutes before the instrument automatically turns off Ensure the unit is turned off when plugging in the Battery Charger When the OTDR is plugged in the AC power the charge indicator will be lit Fig 5 2 The charge indicator will dim when the batter is fully charged Also the battery indicator section on the display Fig 5 3 will display an AC Plug alongside the battery when operating on AC power Help Feature The Bobcat OTDR has an onboard help feature To access the help feature press the Menu button use the directional buttons to highlight the Question Mark icon and press the Select button Use the directional buttons to move to the desired topic and press the Select button Use the directional buttons to move down the help page if necessary Press the Menu butto
23. a the USB cable Press the Menu button to return to the test mode 26 Revision E 2 21 2013 12 0 Loss Test Set Operation 12 1 Power Meter Measurements Power Measurements With the BOBCAT in Loss Test Set Mode Connect the fiber carrying the optical power to be measured to the Power Meter port utilizing the appropriate adaptor Select the power meter wavelength that matches the wavelength of the light being measured The power reading will now indicate the optical power in units of dBm If the power level is greater than 5 or less than 77 dBm the display will indicate an out of range condition by a series of dashes across the main display For higher power ask a representative about a CATV version power meter To save the power measurement to the storage location indicated below the STORE label press the Select button The memory location will auto increment to the next available memory location Relative Measurements To make a relative power measurement you must first save the reference power level To store a reference level attach reference cord s and energize the light source Enter the Menu mode use the directional buttons to highlight the Ref icon and press the Select button The reference is now stored in nonvolatile memory and displayed at the bottom right of the display The units of measure will change to dB Subsequent readings will now be displayed in terms of dB relative to the stored reference value A reference memory lo
24. accessible at turn on The version is displayed on the bottom right hand corner of the display The version changes and approximate release dates are as follows V1 0 07 2009 Original release requires version 4 1 software V1 2 04 2010 Updated for greater than 255 file transfer requires version 4 5 software V1 3 09 2010 Added Construction Mode Default Notes and Miles unit of measure requires version 4 5 5 software V1 3 02 2011 Added Loss Test Set Option V1 4 2 2012 Added interactive home page TTI 2012 34 Revision E 2 21 2013
25. at the selected event An alternative method to return to the trace view is to press the Menu button use the directional buttons to move to the Show Trace soft key and press the Select button Event Table Event Number End of Fiber Trace Parameters Revision E 2 21 2013 Event dB KM Pass Fail Loss or Kf Event 2 Point Event Location Loss Type x a A A Hi Ta Mar A T ele rx T e HA a Hayk Scroll Bar Trace Preview Soft keys 8 3 8 4 8 5 Table Definitions Event Number Indicates the event in sequence where the higher the number the further distance from the OTDR the event occurs E which is always displayed in the bottom row is the event determined to be the End of Fiber EOF P F Pass Fail if any one of the thresholds are not met for and event the P F column will display a red X The parameter that failed will also be displayed in red If all the parameters are met a green check mark will be displayed KM Event Location Km for Kilometer or KF if unit of measure is Kilo feet MI for mile This is the distance location that the event occurs in the respective unit of measure SPLICE Event Loss where a positive number is the amount of loss and a negative number would be indicating a gain This is a settable threshold for the Pass Fail feature 2POINT 2 Point Loss from the end of the dead zone of the previous event to the beginning of current event
26. cation is available for each selected wavelength A reference reading is required to change to dB measurement from dBm measurements Remove the connector from the power meter port and place the fiber under test inline between the reference cord and the power meter port The reading displayed will be the loss of the fiber under test relative to the reference Ensure the unit is not in Menu mode and press the Select button to store the measurement Stored power measurements may be recalled by moving the Directional buttons and the File Selector Screen will be displayed If no buttons are press for 5 seconds after entering the File Selector mode the unit will revert to the test mode The Scan button may also be pressed to re enter test mode 12 2 LTS AUTOTEST Mode To use the Auto Test feature connect the fiber to be tested to a compatible test set The unit being used as the power meter should be in loss test set mode The unit being used as the source should be set to Autotest If Two Quad OTDRs are being used only the wavelengths to be tested should be selected as sources by entering the Wavelength Lambda selection menu Only the wavelengths that are energized will be displayed on the power meter end Once the source and power meter have cycled through the wavelengths to be tested press the Select button to store the measurements Note A reference measurement is not used in the Auto Test Mode The Source is modulated and has power level of 3d
27. con and press Select Use the Directional buttons to move to the desired file storage location This must be an empty position The location with Free is an empty position Press the Select button and a new file will be started There will be a highlighted character position followed by 4 where is the storage position number Use the Directional buttons to change the character and press Select when the desired character is displayed The available Characters are 0 to 9 a to z and A to Z The blank is used to erase a character and moves the cursor back to the beginning of the filename The file name does not support blank characters After each character is entered the next highlighted position is populated with a lower case a Use the Scroll wheel to display the desired character and press Select to move to the next Character When the last character of the file name is displayed do not press the Select button Press the Menu button and Save Changes soft key will be highlight press Select or use the Directional buttons to highlight Discard Changes and press Select In order to maintain continuity between the OTDR flash drive and computer keep the file name to 8 characters with a extension The will be assigned by the OTDR file management system and represents the file number Renaming a Trace To rename a trace highlighted the file to be renamed press the Menu button and use the directional buttons to
28. d with events down to approximately 0 2dB and Low Lo for event down to about 0 5dB Highest sensitivity settings should be used for high signal level low noise long pulse averaged traces Pass Fail Settings Splice ORL and Link are all settable thresholds for Pass Fail purposes To set the thresholds press the Menu button use the directional buttons to highlight desired Soft Key press the Select button and use the Directional buttons to reach the desired value Press Select button again to lock in the settings If the trace fails any of the three thresholds a red X will be displayed in the P F column and the suspect threshold value will be displayed in red ig gt Revision E 2 21 2013 Examples Splice If a splice needs to be less then 1dB set the threshold to lt 1 0 If 1 0 would be accepted set threshold to 1 01db ORL If an ORL needs to be less then 50dB set the threshold to lt 50 If 50dB is acceptable set the threshold to lt 49 Link If the link loss needs to be less then 20dB set the threshold to lt 20 If 20db link loss is acceptable set the threshold to lt 21 To return to trace view press the Menu button use the directional buttons to move to the Show Trace soft key and press the Select button Revision E 2 21 2013 9 0 9 1 9 2 File Management Entering File Management To open the File Management System press the Menu button and use the directional buttons to highlight the TRC
29. deleted Press the Menu button and use the directional buttons to move to the Mark soft key and press Select To mark 1 or 2 files for mass copying press the Select button and the highlighted trace will be displayed in red font and the next trace will be highlighted pressing select again will mark the highlighted file and continue to the next file The red font indicates that the trace is marked for mass management To mark a large number of files the Directional buttons may be used While in the Mark file mode using the directional buttons to move down forward lower to higher number files will mark a file or use the directional buttons to move up backward higher to lower numbered files will un mark a file To skip files shut off the feature by pressing the Menu button and move to the next file to be marked Press the Menu button again and press Select to turn the feature back on Now use the Directional buttons or Select button to continue marking files Individual files may be un marked by pressing Select on a marked file will un mark it Press the Menu button again to exit the marking mode and proceed to copy or delete the marked files ig gt Revision E 2 21 2013 9 8 9 9 9 10 Adding Default Notes A Default note may be saved with a trace To enter default notes for trace files scroll to any empty or Free location press the Menu button scroll to the Notes soft key and press Select The first Character of the note box is
30. ed Continue on until all fibers are tested Manual Scan Setting After powering on the OTDR Enter the menu mode by pressing the Menu button and use the directional buttons to move to the parameter keys on the bottom left side of the display to set the test parameters to the appropriate values 11 Revision E 2 21 2013 ig gt 7 6 These parameters include IOR It is necessary to have the Index of Refraction set as close as possible to the actual IOR of the fiber If this is unknown it is best to use the default setting on the OTDR To change the IOR highlight the IOR icon and press the Select button Use the directional buttons to change the IOR value When the desired value is reached press the select button again and the OTDR will prompt the user to save or cancel the changes Use the directional buttons to highlight desired action and press the Select button Wavelength Use the directional buttons to highlight the Lambda key press select to cycle through the available wavelengths AVG Use the directional buttons to highlight the Average AVG icon and use Select button to cycle through Real time averaging with a up to 4 pps refresh rate Short average 12 seconds or long average 5 minutes Changing this setting will also initiate a scan Pulse Width Use the directional buttons to highlight the PW icon and use the Select button to cycle through the pulse widths of 2m 10m 100m and 1k Making changes to the
31. een bar will fill only half of the zoom bar area meaning half of the entire range of the trace can be viewed As the zoom levels increase the green zoom bar will decrease in size to indicate the amount of the trace that can be viewed at one time As a cursor is moved with the directional buttons the green zoom bar moves to indicate what portion of the trace is being seen For example if the green bar is to the left of the zoom Area the beginning portion of the trace is being viewed and if the green bar is to the right of the zoom Area the end of the trace is being viewed Cursor movement The current active cursor is indicated next to the soft key at the bottom of the display There are two methods to change the active cursor The Cursor soft key on the bottom of the display may be used to change the active cursor Enter the menu mode with the Menu button and use the directional buttons to highlight the Cursor soft key and use the Select button to toggle between active cursors The second method is to use the A B button on the front of the OTDR to toggle between cursors Note To quickly move the active cursor to the next event press the Select button while the unit is in the trace view mode 12 Revision E 2 21 2013 7 7 Cursor Lock The cursors may be locked for accurate measurements To lock the cursors press the Menu button use the directional buttons to move to the Tools icon and press the Select button use the directional but
32. esents an empty memory location if a wavelength indicator is displayed next to the four dashes there is a null test stored to that location for the displayed wavelength This test could be under or over scale Quick File Locator To quickly move through the loss storage locations enter the Menu mode use the directional buttons to highlight the TRC disc icon and press Select The Memory location at the top of the display will be highlighted Press the Select button to focus the highlighted area on thousands position Use the Directional buttons to make changes Press the Select button again to move the focus to the hundreds position and repeat this procedure until the desired storage location is found Using the directional buttons when all the digits are highlighted will move thought the positions one at a time as normal Press the Menu button again to exit the Quick File Locator LTS File Transfer To transfer files from the Loss Test Set to the computer start the Cert Soft certification software Connect the OTDR to the computer with the supplied USB cable go to the tools tab of the software and select Baud Rate and choose Auto Detect or desired baud rate Return to Tools Tab and select Download LTS Files enter a file name and press Save The Software will prompt the user to start the loss test set memory download from the OTDR To start the memory download enter Menu mode highlight the File Download Icon and press Select The download progre
33. ess the Select button to toggle the feature on or off In the lock cursor mode with the A cursor as the active cursor both A and B cursors move together and with the B cursor as the active cursor the B cursor will move independently in order to set the distance between the two cursors ig gt Revision E 2 21 2013 Baud Rate It is necessary to set a com port speed for communication with a computer to set the baud rate highlightthe COM Baud Rate tool press the Select button and a dialog with the available settings is displayed Use the directional buttons to select baud rates from 115k to 921k Press the Select button again to select the baud rate and close the dialog Screen Shot This feature is not available Trace Smoothing Note Smoothing is NOT meant to be used when using the Event Table Smoothing will smooth the trace for visual interpretation and may cause excess events the event table Reflective events could be adversely affected in noisy environments Smoothing helps reduce noise in a trace to better visually discern events To set Smoothing levels or to turn Smoothing off highlight the Trace Smoothing tool press the Select button and a dialog will be displayed allowing the choice of turning off smoothing or setting it to minimum Min or maximum Max Use the directional buttons to select desired level and press Select Smoothing effect is processed after the scan is completed A minimum scan time of 10 seconds Short
34. est Set Icon List Help Delete Quick File Location Tools Menu View Graph Lambda Wavelength Select File Download 12 0 Loss Test Set OPeration zus inwaceteiien rests ee a R E miO 27 12 1 Power Meter Measurements Power Measurements Relative Measurements 12 2 LTS Autotest Mode 12 3 LTS Light Source Operation Energizing Light Source Modulating Light Source 12 4 LTS File Selector File selector Screen Quick File Locator 12 5 LTS File Transfer 12 6 LTS Graph Mode 13 MaslleDance E T EE E E A anne Eee ERBE EEE EEE A 30 13 1 Battery Replacement 13 2 Clock Battery 13 3 Laser Out Port 13 4 Recalibration and Verification 13 5 OTDR Port Adapter Replacement 14 0 Sperme alone A AE A AA cue E EEE E AEA 32 15 0 Warranty Repair and Trouble Shooting cccecce seen eee eee nee nee e nun nn nennen nun nun une nun ene ene 33 13 1 Warranty 13 2 Repair 13 3 Trouble Shooting 160 Verion CONT ON ee ae een E aO a n 34 M Revision E 2 21 2013 Revision E 2 21 2013 1 0 OTDR Quick Start Guide Press to turn on the OTDR Scroll to highlight the OTDR icon and press Select Connect the fiber to the appropriate port Press Menu to enter the Menu mode Use the Directional buttons to highlight the icon on the left side of the display Press amp to cycle to the desired wavelength The OTDR will start a scan at the parameters displayed If approximate fiber length is not known Press the AutoTest button after
35. h icon information below The displayed source wavelength is the active source Turn off all sources by cycling to the Off position Power Meter Enter the Menu mode and use the Directional buttons to highlight the Power Meter soft key Press the Select button to cycle through the available wavelengths See Lambda wavelength icon information below The shown power meter wavelength is the one being tested Modulation There are four source modulation settings 270 Hz 1000Hz 2000Hz and CW constant wave To change the modulation setting enter Menu mode and use the directional buttons to highlight the Modulation soft key Press the Select button to cycle through the modulation rates Loss Test Set Icon List Help The Loss Test Set has an onboard help feature To access the help feature enter the Menu button use the use the directional buttons to highlight the Question Mark Icon and press the Select button Use the directional buttons to move to the desired topic and press the Select button Press the Menu button again to exit the help feature Delete Deleting a stored loss measurement is accomplished in the File Selector mode see LTS File Selector operation Section 12 4 To delete a measurement s from a single memory location use the directional buttons to display the location to be deleted Note the LTS File Selector will time out after approximately 5 seconds of no activity and return to the Loss Measurement mode Enter the Menu
36. highlighted Use the Scroll Wheel to select the desired character and press select Continue on until the note is complete To erase the characters and move forward use the blank To quickly return to the beginning of a note press the Menu button and then the Select button on the Notes soft key To exit the Notes box press the Menu button This note will now be the default note for all traces until it is changed or removed To remove notes Press Select on the blank character until all characters have been removed Copying Traces Traces may be copied to a PC for use with the certification software The Certification Software is required to copy trace files toa PC The certification software will prompt this action when required ready to receive trace files With a trace files highlighted or a group of traces marked press the Menu button and use the directional buttons to move to the Copy soft key Press Select and a Select Deleting Traces Traces may be deleted from the internal memory or USB flash drive With a trace highlighted or group of trace marked press the Menu button and use the directional buttons to move to the Delete soft key Press Select and Cancel or Confirm Delete will be displayed at the top of the screen Use the Directional buttons to highlight the desired action and press select 20 Revision E 2 21 2013 10 0 OTDR Application Information Optical Time Domain Reflectometer Measurements The Bobcat OTDR
37. iodic recharge WARNING To Prevent Fire or Shock Hazard Do not install other battery types Do not use the charger without the batteries installed Do not expose the battery charger to rain or excessive moisture Do not use the AC adapter when there are signs of damage to the enclosure or cord Ensure that you are using the correct charger for the local line voltage Do not use any other charger than the one provided with this instrument Any other condition will void the warranty Laser Safety The VFL is equipped with a 650nm Class II laser See warning label figure 3 1 AVOID EXPOSURE Laser radiation emitted from the aperature The OTDR has been configured with laser diodes having central wavelengths of 850nm CAU T ON 1300nm 1310nm 1490 1550 or 1625nm The unit has been designed to comply with 21 ATOE CFR Code of Federal Regulations 1040 10 and 1040 11 for Class emission limits Do not stare into beam Although the CDRH does not consider Class 1 levels to be hazardous we suggest limiting exposure by not looking directly into the laser aperture Also do not under any MAX OUTPUT lt 1 mw circumstance view or inspect the laser output fibers connectors or the fiber under test WAVELENGTH 620 680 nn through collimating or focusing optics unless the unit is turned off batteries are removed u and power adapter is disconnected Fig 3 1 WARNING Never clean or look directly into the fiber optic connector or the end of fiber attached to
38. n again to exit the help feature USB Port Located on the top panel is the USB PC port which is used to connect the OTDR to a computer to download stored data for analysis with the supplied Windows compatible software VFL The Visible Fault Locator VFL is a stabilized fiber optic laser source that emits visible red light at 650nm Its intended function is to allow an operator to identify the exact location of a break micro bend or other discontinuity in a fiber optic cable As the radiation is visible light emanating from a break or micro bend enables the user to locate the exact position of a fault even at very short distances that would not be detectable by other means It is also useful for identifying a particular fiber in a cable by exciting the fiber to be located with visible radiation To enter the VFL function from the Home Screen scroll to highlight the VFL icon and press Select to cycle VFL through CW constant wave mode or modulated mode and off Revision E 2 21 2013 6 0 6 1 6 2 6 3 Tools Menu Tools Menu Description Although many settings for the Bobcat are set as the user operates the unit there are a number of settings that may be made to increase the ease of use for the OTDR Many of these settings are located in the Tools menu Accessing the Tools Menu To access this menu press the Menu button and use the directional buttons to highlight the Tools icon Press the Select button and the Tools Men
39. ne all fiber ends Contact your FIS sales representative for video microscope information WARNING Never clean or look directly into the fiber optic connector or the end of fiber attached to the OTDR or VFL unit while they are energized to do so will expose the user to laser radiation and could result in personal injury or instrument damage WARNING Before connecting to a patch cord or fiber under test be certain the fiber has no active optical sources or instruments connected to the other end Skin or eye damage could result from other high power sources e g EDFAs or instrument damage could occur voiding the warranty In order to maintain a low loss fiber connection care should be taken to adequately clean the ferrule of any connector to be inserted in the Laser Out Port In the event that the port needs to be cleaned first step is to be certain the instrument is off We suggest the use of isopropyl alcohol and foam swabs specifically designed for cleaning connectors accepting 2 5mm ferrules Recalibration and Verification Periodic verification of the BOBCAT OTDR is recommended to ensure that your instrument remains within specification Although not imperative we recommend a recalibration and verification once a year to make certain the instrument is functioning properly and performing to its rated specifications Consult the factory for service 30 Revision E 2 21 2013 13 5 OTDR Adapter Replacement The OTDR is supplied with
40. owing the unit to be removed The battery door is located on the back side of the unit Replace the batteries only with AA NiMH batteries Spare battery packs are available with a charging unit for extended battery operation If you install NiMH batteries that are dead or less than 1 volt each charge these batteries for one 1 hour before using the Bobcat OTDR For maintenance batteries require a monthly periodic recharge WARNING To Prevent Fire or Shock Hazard Do not install other battery types Do not use the battery charger without the batteries installed Do not expose the battery charger to rain or excessive moisture Do not use the battery charger when there are signs of damage to the enclosure or cord Ensure that you are using the correct charger for the local line voltage Do not use any other battery charger than the one provided with this instrument Any other condition will void the warranty Note For maintenance batteries require a monthly periodic recharge Clock Battery In order to ensure proper Time and Date stamps on test data it is necessary to energize the Bobcat OTDR for a minimum of 5 minutes per month If this is not accomplished it will be necessary to reset the time and date information in the Tools Menu Laser Out Port Do not under any circumstance view or inspect the laser output fibers connectors or the fiber under test through collimating or focusing optics A video inspection microscope should be used to exami
41. pters ST SC and FC Adapters for Hard Copy Manual each OTDR port and for the Power Meter Port Identification Configuration The instrument s Model Part Number Serial Number Date of Manufacture and Configuration are indicated on a label located on the back of the unit The instrument s history is filed at the factory by part number and serial number Power Requirements The instrument is equipped with a 100 240V 0 4A input universal battery charger with 9V 0 66A center positive output AC DC charger that is supplied with interchangeable mains for US Great Brittan Europe and Australia which recharges the unit s internal NiMH batteries 4 AA 2500mA hours Depending on usage fully charged battery pack will typically enable 4 hrs of use Typical fully discharged batteries require 6 8 hours of recharging For best results let charge overnight For extended battery life do not leave battery on charger indefinitely To replace the batteries remove the OTDR from the protective boot by pulling the bottom of the boot down and back allowing the unit to be removed The battery door is located on the back side of the unit Replace the batteries only with AA NiMH batteries Spare battery packs are available with a charging unit for extended battery operation If you install NiMH batteries that are dead or less than 1 volt each charge these batteries for one 1 hour before using the Bobcat OTDR For maintenance batteries require a monthly per
42. r Trouble Shooting Symptom Possible Cause LCD dark Power not on Press ON OFF key Batteries require recharging Recharge batteries Batteries are missing in backwards or Check polarity replace batteries need replacement or contact factory for servicing LCD white Power cycled too quickly Turn off wait 5 seconds turn on Instrument locked Unexpected Operational Mode Turn off hold ON OFF button in for 1 Up second wait 5 seconds then depress On Off again button to turn the unit on Initial Backscatter Replace or clean cord low Defective cord or dirty connector Fiber Output port requires cleaning Angle polish mated with UPC polish Extra or ghost Fiber too long for short pulse reflections on backscatter Fiber over 16Km 53K ft Fiber over 64Km 200Kft USB baud rate not set properly or too quick for computer USB hookup to PC not functioning properly PC drivers not set properly 33 Clean and inspect port Examine connector ends Switch to 10m pulse if gt 4Km Switch to 100m pulse if gt 16Km Switch to 1km Mode if gt 64Km Set port baud rate properly or decrease Baud rate in instrument and certification software Uninstall amp reinstall certification software and drivers Revision E 2 21 2013 16 0 Version Control Through a program of continuous improvement the upgrade of the features and performance of this instrument are an on going process The instrument firmware version is
43. rily memory values before they have been stored with the select button AutoTest Starts the Auto Test function The light source will be turned on and cycle through the wavelengths selected with the A Icon Menu Toggles between the Test Mode and the Menu mode where the focus of the Directional buttons and the Select Button are on the soft keys and icons A B Cycles through the power meter wavelengths selected with the A Icon When in the File Selection Screen this key will toggle through save wavelength values for a particular storage position foom Changes the display to the zoom screen where all stored test for a memory location are display There can be up to 4 test stored per location 22 Revision E 2 21 2013 AutoTest Select Fig 11 1 The Select Button will store all measurements in the temporary memory to the storage position shown the upper left corner while in the Test Mode and while in the Menu mode it will activate an icon item or soft key Directional Buttons When the Directional buttons is moved the File Selector screen is displayed for quick reference and if no key is press for 5 seconds the display returns to the test mode To return to test mode immediately use the Scan button When in Menu mode the Directional buttons moves through the Soft Keys and Icons For most situations Left and Down are the same and Right and Up are the same 11 3 LTS Displays LTS Mea
44. ss will be indicated by the UPLOAD counter in the bottom left corner of the display Note If there is a communication error occurs ensure you turn off and restart the OTDR 28 Revision E 2 21 2013 12 6 Loss Test Set Graph Mode To view measurements in the Graph Mode press the Menu button use the directional buttons to highlight the Light Source soft key and use the Select button to cycle to the desired wavelength for the test If a source other than one compatible for auto wavelength recognition with the OTDR is being used ensure proper the power meter wavelength is selected Once the source is energized and the power meter is taking a measurement enter the Menu mode use the directional buttons to highlight the Eye Icon view press Select and the Scan button to start the graph Pressing the Scan button again will stop the graph The elapsed time of the scan is noted at the beginning middle and end of the graph with the absolute value at each of those points displayed The graph may also be viewed on the certification software Please refer to the software for information on how to display the graph view on the computer To exit the Graph Mode press the select button again with the Eye Icon view highlighted 29 Revision E 2 21 2013 13 0 13 1 13 2 13 3 13 4 Maintenance Battery Replacement To replace the batteries remove the OTDR from the protective boot by pulling the bottom of the boot down and back all
45. surement Screen Next Storage Location Current Reading Power Meter A Active Source A mow ot I Constant root J d Wave Icon Bar o Ca swe E dBm 4e r Source Power Meter Mod Out Fig 11 2 LTS File Storage Access Screen Current Memory Location Loss Value of Previous Memory Location Loss Value for Current Memory Location Loss Value of Next Memory Location Power Meter Fig 11 3 23 Revision E 2 21 2013 Stored Reference Of Displayed PM Wavelength Source Mode Home Icon Soft Keys Reference for Currently Displayed Test Data Wavelength of Current Loss Value Press A B button to cycle through wavelengths stored in a memory location 11 3 LTS Displays continued LTS Zoom Screen Current Memory Location First Wavelength Test Data fora Memory Location Second Wavelength Test Data fora Memory Location Note Up to 4 wavelengths may be stored for one test Fig 11 4 LTS Graph Screen Center Cursor Elapsed Time of Test at the Beginning and End of the Display with Power Levels Aal 7 AA A1 3 6dBm 00 01 17 Bidet Values at Center Cursor g ee Se age gt Eye dBm SOUrGE Power Peter Mod Out Fig 11 5 24 Revision E 2 21 2013 11 4 Soft Keys Source Enter the Menu mode and use the Directional buttons to highlight the Source soft key Press the Select button to cycle through the available wavelengths See Lambda wavelengt
46. surements The LSA areas may be expanded decreased or moved along the backscatter area adjacent to the event The areas should not include other events such as reflective or splice events A line is displayed to assist with setting the proper LSA areas The LSA areas are set properly when the LSA lines overlay the back scatter sections of the trace before and after the event To set the LSA areas press the menu button use the directional buttons to move to the SPL icon and press the Select button The focus of the Directional buttons is now on the LSA areas The position of the area that is being changed is indicated by the Blue arrow floating above the trace It is also indicated as a green section on the cursor To move to the next LSA adjustment point use the Select button When finished setting the LSA area press the Menu button to return to Menu Mode or press it a second time to return to the trace mode Please see Fig 8 3 for examples of proper LSA settings In Noisy environments the LSA Lines will have an exaggerated movement making the Basic Splice Loss Measurement potentially more accurate Please see the following examples 13 Revision E 2 21 2013 7 8 7 9 LSA Examples LSA Areas Set Too Early LSA Areas Set Properly LSA Areas Set Too Late 7 a A G 4 lmt Per Div 1 2c0B gt 4 lnt Per Div 172JE lt Status File Loaded Status Laser OTT AFI B Cursor LSA 0 463 B Cursor LSA 1 40 B Cursor LSA 1 802 Fig 7 3 The
47. the new base file name until it is change The file that was just created may be deleted if desire by following the procedures in section 10 9 Set Default Notes To enter default notes for trace files enter File management as above and use the directional buttons to highlight any empty or Free location Press the Menu button use the directional buttons to highlight the Notes soft key and press Select The first Character of the note box is highlighted Use the directional buttons to display the desired character and press select Continue on until the note is complete To erase the characters and move forward use the blank To quickly return to the beginning of a note press the Menu button and then the Select button on the Notes soft key To exit the Notes box press the Menu button This note will now be the default note for all traces until it is changed or removed To remove notes Press Select on the blank character until all characters have been removed Conduct The Tests Connect a fiber to the proper test port and press the Autotest button The OTDR will conduct the test at the first wavelength and store the trace in memory using the base file name given and the default notes attached The second wavelength is then started and once complete it is also stored to memory and then both traces are displayed for review Disconnect the fiber connect the next fiber and press Autotest The two tests will be completed stored and display
48. the source is off precisely half of the time The modulation function is useful for fiber identification and for general purpose optical component testing The unit that receives one of the modulated frequencies will flash the appropriate frequency annunciator The 3 01dB drop is also true of the laser output when in the Auto Test mode however the unit receiving this signal automatically compensates for the loss in average power and this is transparent to the user LTS File Selector File Selector Screen Enter the File Selector Screen with the use the directional buttons In the File Selector screen the soft keys will be inactive and grayed out The Store location in the top left of the screen will be changed to MEM location and there will be three loss values on the display The middle one is the measurement stored in the indicated memory location with the wavelength of the reading to the right Pressing the A B button will cycle through the readings stored in that location if more than one wavelength was stored The grayed out readings above and below the main reading are the measurements of the previous and next memory locations If there is not activity in 5 seconds the screen will revert back to the Test Mode The Scan button will also revert the unit to the test mode NOTE Pressing the Select button will overwrite the displayed test with whatever is in the temporary memory location Four dashes without a wavelength indicator next to them repr
49. tion Save to the Next available location or Cancel the action Use the directional buttons to move to the desired action and press Select The storage location will increment accordingly Note There are sample traces stored on the OTDR at the factory These traces are saved with the base file name of default Quick Recall To quickly recall a trace press Menu use the directional buttons to move to the Recall soft key and press the Select button to display the trace that is saved in the memory location indicated and the next memory location with a trace will then be displayed 14 Revision E 2 21 2013 ig gt 8 0 8 1 8 2 Event Analysis NOTE When using the event table it is necessary to keep in mind that event analysis provides approximate loss and distance measurements to quickly assist in network evaluation Automatic detection results are not guaranteed and have their limits possibly causing erroneous readings or detection failure User interaction by interfacing with the trace display is recommended for final qualitative and quantitative analysis Enter Event Analysis To open the event analysis table press the Menu button use the directional buttons to highlight Show Event soft key and press the Select button Use the Directional buttons to move through the evens If the Select button is pressed while an event is highlighted The OTDR will revert to the Trace Screen with the active cursor positioned
50. tons to move to the A B icon and press Select to toggle the lock cursor mode on and off In the lock cursor mode with the A cursor as the active cursor both A and B cursors move together and with the B cursor as the active cursor the B cursor will move independently in order to set the distance between the two cursors Loss Measurements Definitions e 2 Point loss method takes the difference in vertical height between where the A and B cursors cross the fiber trace to determine loss e The dB Km dB Kft loss method takes the 2 Point loss in dB and divides by the distance between the cursors in Kilometers Kilo feet For accurate dB Km dB Kft loss measurements the two cursors must be on level backscatter points at least 100m apart NA will show for distances that are too short e Basic Splice Loss method takes the loss around cursor A and B The averaged areas before and after the splice must be level backscatter free from defects or splices Set a cursor at the beginning of an event and set splice loss measurement areas as directed below for accurate splice loss measurements e Least Squares Approximation LSA Splice loss method gives the use a visual aid in setting splice loss areas This method can be more accurate by affording the ability to see the slope of the splice loss areas however it can also supply a reading with greater error if not used properly The splice loss lines must be set to overlay the backscatter of a trace without
51. u dialog will be displayed Use the directional buttons to highlight desired function To exit the Tools Menu press the Menu button Tools Menu Functions Set Viewable Measurements The Bobcat OTDR allows the user to set which loss measurements to be displayed The available loss measurements are splice loss or Least Squares Approximation LSA splice loss for both cursors dB value between cursors distance between cursors and dB per Km or Kf If any of these measurements are not of necessary for a series of test one or more may be turned off for ease of viewing To accomplish this open the tools menu highlight View Icon and press Select A box will be drawn around the splice loss measurements Use any Directional button to cycle the measurement between LSA Splice Basic Splice Loss or off Press Select to move to the next measurement The remainder will just toggle between off and on by pressing any directional button Continue through the four measurements and the Tools menu will be returned to the screen when Select is press on the last measurement After setting dBm km pressing select will return focus to the Tools menu dialog Pressing The Menu button at any time will close the Tools menu Wavelength Filter Wavelength Filter allows the user to turn on and off wavelengths as desired for OTDR testing To accomplish this highlight Wavelength Filter and press Select Scrolling to a wavelength and pressing Select will toggle a wavelength off and
52. ust be aware of the Index of Refraction of their fiber or cable The fiber Index of Refraction IOR is an important parameter that must be entered by the user to maximize the distance measurement accuracy The IOR is proportional to the speed of light in glass compared to the speed in a vacuum and can be calculated by the equation IOR C the speed of light in a vacuum V the speed of light in fiber The IOR number can be obtained by the fiber or cable manufacturer or can be calculated with a known length of cable IOR numbers generally fall around 1 468 SM 1 486 MM These are the default values in the OTDR but can be adjusted from 1 0 to 2 0 To calibrate the IOR for your particular fiber take a known distance of fiber or cable best if around 1 kilometer and measure the distance with the Bobcat OTDR set for 2m pulse width changing the IOR until the measured distances closely match An error of 001 of the IOR entry 1 468 vs 1 469 equates to an error of approximately 0 7 meters per kilometer of distance measured 21 Revision E 2 21 2013 11 0 Loss Test Set Description 11 1 Entering Loss Test Set Mode To enter the LTS mode from the Home menu scroll to highlight the LTS icon and press Select To return to the home display from the LTS enter the Menu mode scroll to highlight the Home icon and press the Select button 11 2 Key Pad Operation Q Power button turns the unit On and Off Scan Resets any tempora
53. utton actuates highlighted item While in the trace mode the directional buttons are used to move the cursors and while in the Menu mode the focus of these buttons is placed on the movement between icons or used to change settings 9 Revision E 2 21 2013 ig gt 7 2 7 3 7 4 Trace Display A B Cursors w Distance Values Trace Zoom Bar ea Trace File Values Status Loss Measurements Parameter Icon Bar eye Home Icon Parameter RHG FFT m Values l 7 Battery Soft Keys Zoom tt Cursor Save 001 Recall 001 Event Indicator Fig 7 2 WARNING Before connecting to a patch cord or fiber under test be certain the fiber has no active optical sources or instruments connected to the other end Skin or eye damage could result from other high power sources e g EDFAs or instrument damage could occur voiding the warranty WARNING Clean connector thoroughly prior to connection to the appropriate port of the OTDR Failure to ensure the connectors used with the OTDR are properly cleaned can result in poor launch conditions at the minimum or damage that requires the unit be returned to the factory for repair Enter Exit OTDR function To enter the OTDR function upon power up scroll to the OTDR icon and press select To exit the OTDR function scroll to the Home icon and press Select Auto Test Range Finder This is a useful feature when the approximate length of the fiber to be tested is unknown To conduct a Range
54. vent analysis screen The fiber loss vs distance in its central graph is large with easily manipulated cursors The scales are automatically updated for expansion modes and with position changes of the A and B cursors Individual and dual cursor measurements are displayed as well as important instrument parameters such as Index of Refraction pulse width wavelength range scanning speed and a battery gauge The 11 key panel provides simple straightforward commands to take a scan make measurements or navigate the soft key and Icon menus A new scan is accomplished as easily as pressing the Scan button within 1 4 second fiber trace data is accessible To automatically adjust for an unknown fiber length press the Auto Test button The soft key menus are navigated pressing the menu button and use the directional buttons to move to the soft key bar located at the bottom of the display Instrument setup is easily accomplished with the use of the Icon menu also located at the bottom and bottom sides of the display Revision E 2 21 2013 3 0 3 1 3 2 3 3 3 4 Preparation for Use Inspection Before shipment this instrument has been inspected and found to be in perfect working order and free of defects The shipping carton should contain the following OTDR with protective boot and 4 AA NiMH batteries installed Universal AC DC charger with interchangeable mains CD with Windows compatible software USB cable Set of interchangeable ada
55. with single wave and Dual wave laser sources The Bobcat OTDR is packaged in a rugged hand held case which is further protected with a rubberized boot All controls are accessible via an 11 key weatherproof membrane keypad with a directional buttons to move through the screen offering simple straightforward functionality The Bobcat OTDR is capable of measuring 2 point loss splice loss loss per km and event ORL The singlemode and multimode output ports use high power 850 1300 1310 1490 1550 or 1625 nm pulsed laser sources The backscatter receiver uses a temperature compensated avalanche photodiode for reliable stable performance in fiber links from tens of meters to over 240Km A high speed microprocessor provides the N point averaging function and control for lt 1 4 second Real Time update rates The Bobcat OTDR is available with an Auto Wavelength Switching Power Meter The power meter is calibrated at the 850 1300 1310 1490 1550 and 1625nm with storage of up to 10 000 power meter tests The certification software incorporates a feature to supply loss measurement reports and a real time graph The color TFT LCD display provides a powerful yet simple set of fiber parameters and control indications to view an entire fiber link or zoom in and analyze a splicing point or defect in the fiber The display shows all or just the desired loss information and offers a preview screen on the file management screen and event preview displayed on the e
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