Download - M200 OTDR Training 1-800-321-5298 Using an M200 OTDR For M200 Version 1.0.6 released November 2006
M200 OTDR Training
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Using an M200 OTDR For M200 Version 1.0.6 released November 2006
M200 OTDR Training
1-800-321-5298 www.AFLtele.com
Outline• Features• Test Modes
– Full Auto– Live– Expert
• Main Menu Set Up– Test Settings– File Settings– General Settings– Event Settings
• Testing• File Management
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Features of the M200• Single-mode, Multimode and ‘Quad’ models
• Short event / attenuation dead zones
– (1.5 / 9 m typical)
• Intermediate range (26 dB) good for access, FTTH, and premises fiber networks
• Hand-held (1.9 lb)
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Features of the M200• Li-ion battery:
– ~ 8 hour operating time– Tool-free battery door
• New, graphical user interface with web-like PREV / NEXT keys to view results
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Features of the M200• Test, View, & Save As in trace pairs
850/1300nm or 1310/1550nm
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Features of the M200 • Tool-free, changeable test port adapters
– SC, FC, ST included (LC available-call factory)
• Trace600 software (free-ware)
• Internal & Compact Flash data storage
– Store 1000’s of traces
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Features (cont.)• Transflective Color Display
– Crisp and bright indoor & in direct sunlight
• Dedicated Test & Save Keys
• Integrated VFL (650 nm)
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Features (cont.)• Quick disconnect integrated into
boot for wrist strap or other hanging devices
• USB port to transfer data to PC using ActiveSync
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Features (cont.)• Rich file naming and folder setup• Standard Bellcore.SOR trace file format
– (GR-196)
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Features (cont.)• Touch-screen may be used for text entry
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M200
Set Up &
Home Page
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Home Page
•M200 start-up page
•If user hits Back/home key successively, they will get to this screen after exiting other screens
•Allows access to File Manager for reviewing Traces on the M200 and managing the files and folders
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Home Page Test Modes
•Full Auto, Live or Expert Test Mode is selectable from the Home Page usingbuttons
•Fiber Type (shown as Single-mode) is not selectable from the home page
M200 OTDR Training
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Home Page Launch & Receive1 Launch & 2 Receive cables are specified in the test set up
Launch cable only specified in the test set up
Fiber Ring
Launch/Receive
1 2 1
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Home Page Next Tests
•Name for next test: SMITH HALL 001
•Fiber Number of the next test, can be incremented from 001 to 999 using the buttons
•File Storage: as shown next tests will be stored to Compact Flash (CF) in the folder named SPG
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Main Menu
TEST SETTINGS
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Test Settings: Main Menu -Test TabAccess Main Menu by pressing at the Home PageTest is the first Tab in all test modes
Full Auto Expert Auto Live Expert Manual
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Test Settings: Sub Menus
Parameters followed by “…” indicate there is a submenu. To access, highlight the parameter and press select the button
Fiber Type:Use default setting or refer to manufacturers fiber specifications for the fiber under test
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Test Settings: Main Menu - File TabUse to create a New Folder or to Change the Folder
into which the Next Test Traces will be saved.
1. Highlight Folder…2. Press the button to
open the File Manager3. Use and buttons to
choose an existing file4. Or Press Tools, use the
down arrow to select New Folder to create a new folder
Tools Pop up menu
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File Name FormatName Format – user selectable[Cable_Fiber] or [Far_Fiber]
SMITH HALL_001_S13.sor
Wavelength indicator- added by M200
Fiber number –user set, will auto increment
File name prefix – user defined
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Test Settings: Main Menu - General Tab
• Distance Units: select the units to be used for distance measurements:– Meters, Kft, Km, Miles, Feet
• Beeper: Audible tone On or Off
• Language: Select English or other available language. OTDR must restart to make current
• View Version: Important for calls to Tech Support or for upgrading the M200
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Test Settings: Full Auto ModeSelect the Mode by using
•Full Auto, Live, Expert
•Select the Test Port type by using
•Single-mode or Multimode
Specify if using Launch &/or Receive cables, and their respective length
Full Auto tests will be performed at two wavelengths per test:
•850/1300nm for Multimode
•1310/1550nm for Single-mode
Main Menu Test Tab
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• Specify a Range: 1.5 to 2 x length of fiber under test
• Live tests will be performed at ONLY one wavelength per test: – 850 or 1300nm for Multimode – 1310 or 1550nm for Single-mode
• Specify if using Launch &/or Receive cables, and their respective length
Test Settings: Live ModeWith the Mode line highlighted use the buttons to select Live
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Expert Auto uses default settings to perform a test but allows the user to test at a single wavelength if desired
Expert Auto tests can be performed at one or two wavelengths per test: – 850 and/or 1300nm for Multimode – 1310 and/or 1550nm for Single-mode
Test Settings: Expert Mode AutoHighlight the Mode line and use the buttons to select Expert
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In Expert Manual the user must know information about the fiber under test and how to set up an OTDR
Expert Manual tests can be performed at one or two wavelengths per test: – 850 and/or 1300nm for Multimode – 1310 and/or 1550nm for Single-mode
Test Settings: Expert Mode-ManualWith the Mode line highlighted use the buttons to select Expert
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• Range: set to 1.5 to 2 x length of fiber under test including launch/receive cables
• Pulse: (see next slides)– Narrow pulses are best for resolving close events but
are limited to short links.– Wide pulses are good for measuring long links
• Time (Averages): (see next slides)– Traces are always averaged over hundreds or thousands of
pulses. – The trade-off is time vs. trace quality. – After about 3 min, you get very little additional improvement
• Filter: selectable as On or Off, – Smoothes choppy traces. – As a rule of thumb use with PW 1us or greater
Test Settings: Expert Mode - ManualUse buttons to specify the parameters for testing
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Range
Too short: less than link length
Link
Can’t see entire link – unpredictable results
Good: about 1.5x to 2x link length
Link
Good trace – can see end of fiber
Too long: much larger than link length
Link
Trace is “squashed” into left side of display
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Pulse Width
Too wide:
Can’t resolve events
About right:
Events can be seen and trace is smooth
Too narrow:
Trace “disappears” into noise floor
Link Link Link
Where is this this event?
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Averages (Time)
Too many
Trace is smooth but waste of time
About right:
Trace is smooth
Too few:
Trace is noisy – noise floor is too high
Link Link Link
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Main Menu: Expert - Events Tab
• Events: set to Auto or Off
• Thresholds: set to Default or User
• Auto Default will generate an Event Table using the M200 settings
• Off will not automatically generate an Event Table
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Main Menu: Expert - Events Tab
• Events: set to Auto• Thresholds User
– Press Select and adjust the parameters using the navigation buttons
• Auto User will generate an Event Table using the users threshold parameter settings
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Testing• Clean all connectors to be
involved in testing• Connect Launch Cable to the
appropriate Test Port and the Fiber Under Test
• If using connect Receive Cable to far end of Fiber Under Test
• Set the OTDR up as previously explained
• Press Test
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Trace View TabDisplays the:
1. OTDR Trace graphically
2. Trace set-up parameters
3. A and B cursor locations
4. Distance from A to B cursors in user selected distance units
5. Insertion Loss measured from the A to B cursor
LaunchCable
4
23
1
5
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Trace View Tab (cont.)1. Single-mode
2. Dual Wavelength 1310/1550nm
3. 150m Launch Cable
4. Trace is not yet saved
5. As shown traces will be saved:
To the Compact Flash in the SPG folder as file:
QA Box 001_S13.sor &
QA Box 001_S15.sor
LaunchCable
2
31
54
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Zoom Adjust – Trace View
• From Trace View press the Zoom Adjust soft key
• Zoom will occur around the “active” (solid cursor)
– To change cursors press the select button
• Use the Navigation buttons to adjust the zoom level
• Press the soft key “OK” when finished zooming
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Event Table Tab
• Displays a graph of the OTDR trace plus test date in the event table– Event Locations– Event Type– Event Reflectance (dB)– Event Insertion Loss
Generated for Full Auto & Expert Tests if Events is set to Auto
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Event Table Tab
• Event Icons Type
Start
End
Reflective Event
Non-Reflective Event
Gainer
Multiple Event
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Event Table Tab• Touching the event in the
table or using the navigation buttons will highlight and put the cursor on the event selected
• The navigations buttons will zoom/un-zoom around the selected event cursor
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Re-Calculate an Event Table
• Press the soft key for “Re-Calc” if you desire to change a test parameter
• This opens a window of parameters some which can be changed, (black text)
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Calculate an Event Table
• An Event Table is generated for Full Auto Tests & Expert Tests if Events is set to Auto
• Press the soft key for “Calc” if an Event Table was not calculated
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Summary Table
Displays a graph of the trace
Displays a table with– Link Length– Optical Return Loss (dB)– Insertion Loss (dB)
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Saving a File - File Info Tab• Displays the fiber set up
parameters of the currently displayed trace
• Allows you to change the Name Format, Near, Far or Cable names, Fiber Number or Folder where the test will be saved
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Saving a File• Press the dedicated
Save key to save the file
• You can save from the Trace, Event Table, Summary or the Save Tabs
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File ManagementOpening Traces for Review
Swapping from CF to Internal
Tools
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Opening a Saved Trace for ReviewTo review saved tracesPress the Files Soft Keyfrom the Home Page to open the File Manager
Use Navigation keys to select folders or files
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Opening a Saved Trace for Review
Use Navigation keys to select folders or files
Use to move up or down the list of files/folders
Use to move to the Top or Bottom of current list
Press the select button with the up arrow line selected to go up a level
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Opening a Saved Trace for Review
Use Navigation keys to select folders or files
Use to move up or down the list of files/folders, press the select key to highlight the file (file pair) you would like to review, press the open soft key to open the file
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Swapping CF to Internal*• Use the navigation keys
to select the drive you desire (will have red lines above and below it to show it is selected) Press the Select key to open that folder
• If select was pressed in this example the CF folder would be opened
*Note: you must have a CF card inserted in the M200
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TOOLS• In file manager the soft key
Tools opens a window to allow you to manage files:– Cut files/folders– Copy files/folders– Paste files/folders– Delete files/folders– Create New Folders– Rename files/folders– Select All – Select None
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TOOLS (cont.)• If moving files it is
recommended to copy and paste them not cut them
• Assure you have made a successful copy before cutting or deleting files/folders
Example: 1310nm tests selected for copyingUp/down & select were used to select the tests
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Using an OTDR• You must use a launch cable to measure the loss
of the near-end connection• You must use a receive cable to measure the loss
of the far-end connection• Both cables must use the same type fiber (50 m,
62.5 m, or single-mode) as the link under test• For testing links under 2 km, the length of the
launch and receive cables should be about 100 m, for long fibers under test, longer launch and receive cables may be needed
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• Without launch and receive cables the OTDR cannot measure the IL of the near-end or far-end connections.
• This is a problem in premises links, which are typically short, because these connections represent a large portion of total link loss.
Fiber IL
1 2
Start event End event
Link
No launch or receive cable
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• Adding the launch cable enables the OTDR to include the loss of the near-end connection in total link loss calculations, and measure its reflectance
Adding a launch cable
A B
Fiber + Near-end IL
LaunchCable Link
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• Adding a receive cable enables the OTDR to include the loss of the far-end connection in total link loss calculations, and measure its reflectance
Adding the receive cable
A B
Link IL
LaunchCable Link
ReceiveCable
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• If launch and receive cables are installed
• To see total link loss, view event table -- cumulative loss at last event will equal total or “end-to-end” link loss
End-to-end link loss
A B
Link IL
LaunchCable Link
ReceiveCable
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LaunchCable
(Fiber Ring)OTDR
SMMM
Work AreaOutlet
HorizontalPatch Panel & Patch Cords
Splice
MainPatch Panel
B A
BA A
B A
ReceiveCable
(Fiber Ring)
B
HorizontalSegment
BackboneSegment
Using an OTDR
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OTDRscreen
0
0 25050 100 150 200
-2
-1
-3
-4
RelativePower(dB)
Distance (m)
A B
Link beingtested
OTDR
LaunchCable
HorizontalSegment
BackboneSegment
ReceiveCable
SplicePatch Cord
Reading an OTDR Trace
LaunchCable
Splice(Loss 0.1 dB)
Rcv.Cable
TraceHoriz.Seg.
(2) Connections (Loss 0.8 dB)
BackboneSegment
(1) Connection(Loss 0.4 dB)
Link Loss ( 2.1 dB)
(1) Connection(Loss 0.4 dB)
Link Length ( 130 m)
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Transferring Files to PC• Files can be transferred to a PC from the
Compact Flash, using a Compact Flash Reader
• Files can be transferred directly from the M200 to a PC using a USB cable. You may need to install new USB drivers included on the CD-ROM that comes with the M200
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Address: 16 Eastgate Park RoadBelmont NH 03220
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Fax: 603-528-2025
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