1
Communication Products Training30 October 2009Jonathan Setiawan
Jonathan Setiawan
COPYRIGHT BY YEA April 2008AQ7275 OTDR
Product TrainingQUALITY • INNOVATION • FORESIGHT
2
Agenda
Introduction to OTDRIntroduction to OTDR
AQ7275 IntroductionAQ7275 Introduction
AQ7275 FeaturesAQ7275 Features
AQ7275 Operation GuideAQ7275 Operation Guide
AQ7275 Advance OperationAQ7275 Advance Operation
Questions and AnswerQuestions and Answer
3
Introduction to OTDR
An instrument to measure optical fiber lengths and losses and identifies failure locations from one end only.
Measurement itemsDistance : Fiber Length, connection (reflective & non-reflective), fiber breakLoss : Transmission loss, connection lossReturn loss : Connectors, end of fibers
Optical Time Domain ReflectometerOptical Time Domain Reflectometer
4
Introduction to OTDR
PulseClad
CoreFerrule reflection
Transparent light
Measurement PrincipleMeasurement Principle
Measure the length of fiber
Backscattered light Level Loss
Time Distance
Laser Diode
Beam splitter
L D
Photo Detector
Amplifier
Average
Display
Pulse Generator
5
Fusion splice
Optical fiber Optical fiber
AQ7275 OTDR
AQ7275 OTDR
Introduction to OTDR
Measurement PointsMeasurement Points
6
Introduction to OTDR
Measurement ExampleMeasurement Example
7
Mechanical splice Physically connecting the fibers using “V-groove” device
Connector Physically connecting the fibers using adapter
Fusion splice Fusing the tips of fibers to connect one another
Connection MethodConnection Method
Introduction to OTDR
8
Connector pointCaused by a small gap between ferrules joined by a
connector. Refractive index varies at this gap which makes a
reflection.※ Normal connector loss is less than 0.5dB
Cause of Reflective LossesCause of Reflective Losses
Introduction to OTDR
Connector point Caused by stains on the tips of ferrules which disturbs the alignment of the cores of fibers. Stains increase losses and reflections ※ Normal connector loss is less than 0.5dB
Stain
Open EndA Fresnel reflection occurs at breakage point
or edge of optical fiber where refractive index changes.
There is approximate 3% (-14.7dB) of reflection when optical fiber is cut in perpendicular to the fiber.
Gap
Connector
Optical fiber
Optical fiber
Glass
AirInput light (100%)
Output Light (97%)
Reflected light (3%)
9
Fusion Splice pointCaused by misalignment of cores when fused each other.
※ Normal fusion splice loss is less than 0.1dB
Cause of Non-Reflective LossesCause of Non-Reflective Losses
Introduction to OTDR
Macro bendCaused by transmitting light leaks from optical fiber when the fiber is
bended sharply.
10
Agenda
Introduction to OTDRIntroduction to OTDR
AQ7275 IntroductionAQ7275 Introduction
AQ7275 FeaturesAQ7275 Features
AQ7275 Operation GuideAQ7275 Operation Guide
AQ7275 Advance OperationAQ7275 Advance Operation
Questions and AnswerQuestions and Answer
11
AQ7275 Introduction
12
AQ7275 Introduction
13
AQ7275 Introduction
14
AQ7275 Introduction
15
AQ7275 Introduction
Configuration of Peripheral DevicesConfiguration of Peripheral Devices
16
Agenda
Introduction to OTDRIntroduction to OTDR
AQ7275 IntroductionAQ7275 Introduction
AQ7275 FeaturesAQ7275 Features
AQ7275 Operation GuideAQ7275 Operation Guide
AQ7275 Advance OperationAQ7275 Advance Operation
Questions and AnswerQuestions and Answer
17
Short Dead Zone (< 80cm)Short Dead Zone (< 80cm) - - Killer spec. for FTTH testing
Accompanying the rapid proliferation of FTTH is a growing need for detection of reflective events arising from short distance mechanical connections.
The AQ7275’s short event dead zone enables detection of closely spaced events in cables installed in offices and customer premises.
1m
AQ7275 Features
Advanced !Advanced !
18
High dynamic range (up to 45dB)High dynamic range (up to 45dB)
The high dynamic range model (735034) can achieve the dynamic range of 45 dB. This high dynamic range is effective in measuring a transmission line consisting of long fiber cables and a splitter with a large loss.
AQ7275 Features
Advanced !Advanced !
19
Powers-up quickly (in 10 seconds or less)Powers-up quickly (in 10 seconds or less)
Now measurements can be started quickly upon arrival at the site.10 seconds to power-up from completely OFF to fully ON!
With such a fast power-up time, battery life can be extended by turning the power off while not in use at the job site without any concern about the power-up time when the next job is ready.
It’s ready when you’re ready!
AQ7275 Features
Advanced !Advanced !
20
AQ7275 Features
21
AQ7275 Features
22
AQ7275 Features
23
AQ7275 Features
24
Plug Check FunctionPlug Check Function
You can detect poor connections and dirty plugs.The plug check function monitors the condition of the optical connectors and displays an alarm if the connection is not properly made.
This function is useful for checking for damage, dirt, or other problems with optical plugs at the OTDR or on the fiber under test. It is also useful for helping technicians to remember to connect the fiber under test.
AQ7275 Features
Active Line AlarmActive Line Alarm
There may be concern that technicians inputting the OTDR measurement signal into the communication line could cause communication errors.
The active line alarm monitors the fiber’s optical power level and displays an alarm message if it detects optical power at or higher than a specified threshold level in order to warn the technician not to mistakenly feed the signal into the communication line.
25
AQ7275 Features
26
AQ7275 Features
27
Multi Fiber Measurement FunctionMulti Fiber Measurement Function
Automatically performs measurements and data-filling according to a pre-established file name table.The OTDR Project File Editor included in AQ7932 Emulation Software greatly saves time to create file name table
Advanced !Advanced !
AQ7275 Features
NEW
28
External Large Capacity Battery The operation time will triple that of a standard built-in battery.
AQ7275 Features
Angled-PC Connector (SC only)You can connect an optical fiber with an angled-PC connector directly to the OTDR. The angled PC is often used for CATV networks to reduce the influence of reflection.
29
Agenda
Introduction to OTDRIntroduction to OTDR
AQ7275 IntroductionAQ7275 Introduction
AQ7275 FeaturesAQ7275 Features
AQ7275 Operation GuideAQ7275 Operation Guide
AQ7275 Advance OperationAQ7275 Advance Operation
Questions and AnswerQuestions and Answer
30
• Measure the distance• Measure the splice loss and return loss• Analyze multiple waveforms
AQ7275 Operation Guide
Measurement Preparation• Connect the power supply and turn it ON• Connect the optical fiber cables• Load the printer paper
Measurement Condition Setup
Trace Acquisition • Real time measurement• Averaging measurement
Trace Analysis
Trace Printing and Storage• Print the display image• Save various types of data
• Full-auto Mode• Wizard Mode• Detail Mode• Multi wavelength Mode
31
MENU key Returns to the Top Menu, where user can selects OTDR, optical power monitor, light source, Visible Light Source or One Button (Macro) function.
F1 to F5 keyExecutes functions that are assigned to the soft keys displayed at the right edge of the LCD.
ESC keyCancels an operation or returns to the previous display.
FILE keyOperate files and print waveforms. Some also used as soft keys.
POWER keyTurns the instrument ON/OFF.
AQ7275 Operation Guide – Front Keys FunctionsMeasurement PreparationMeasurement Condition Setup Trace Acquisition Trace Analysis Trace Printing and Storage
32
Rotary knobMoves cursors and markers, sets values, etc. PUSH for Coarse or Fine mode.
Scale key Expands, reduces, and moves waveforms.
Arrow keyMoves, expands, and reduces waveforms, moves cursors, etc.
Enter keyConfirms the operation.
Setting keySets measurement conditions and
system configuration. Also used to change the event
detection conditions for event analysis.
Average keyStarts or stop the averaging measurement.
Realtime keyStarts or stop the real time measurement.
AQ7275 Operation Guide – Front Keys FunctionsMeasurement PreparationMeasurement Condition Setup Trace Acquisition Trace Analysis Trace Printing and Storage
33
Power LampGreen: Running Red: Low battery Level
Charge LampGreen: Charging Green (blinking): Charging not started / preliminary charging
• The battery pack is not loaded correctly in the AQ7275• The temperature of the battery pack is outside the chargeable temperature range• The battery pack is in the preliminary charging condition because the battery level is extremely low
Check that the battery pack is loaded correctly. If the green lamp does not illuminate even after 2 or 3 hours passes with the AC adapter connected, the battery pack may be broken or reduced life.
AQ7275 Operation Guide
Turning On the OTDRTurning On the OTDR
Measurement PreparationMeasurement Condition Setup Trace Acquisition Trace Analysis Trace Printing and Storage
34
Cleaning Fiber Optic Cleaning Fiber Optic CableCable
Correct method
Wrong method
X
Connecting Fiber Optic Connecting Fiber Optic CableCable
AQ7275 Operation GuideMeasurement PreparationMeasurement Condition Setup Trace Acquisition Trace Analysis Trace Printing and Storage
35
Good connection
Bad connection
Good vs. Bad Connector End Good vs. Bad Connector End FaceFace
Near end performance
Overall Trace performance
AQ7275 Operation GuideMeasurement PreparationMeasurement Condition Setup Trace Acquisition Trace Analysis Trace Printing and Storage
36
AQ7275 Operation GuideMeasurement PreparationMeasurement Condition Setup Trace Acquisition Trace Analysis Trace Printing and Storage
OTDR automatically determines the measurement conditions, performs a measurement and analysis, and also saves measurement data.
Wavelength setting is required prior to the execution.
37
To modify certain parameter on Analysis Setup menu, change the setup mode from Full Auto to Detail mode, then set the parameter to modify on Analysis Setup menu.
Full Auto ModeFull Auto Mode
AQ7275 Operation GuideMeasurement PreparationMeasurement Condition Setup Trace Acquisition Trace Analysis Trace Printing and Storage
Detailed condition setting for Experts
38
More measurement conditions to set effectively and speedy
Detail ModeDetail Mode
AQ7275 Operation GuideMeasurement PreparationMeasurement Condition Setup Trace Acquisition Trace Analysis Trace Printing and Storage
With the step-by-step guideline and pop-up instructions, user can easily configure the measurement and other setup.
39
Pop up instructions for detailed parameter
descriptionStep-by-step guideline
Manual is not needed!
Measurement Wizard ModeMeasurement Wizard Mode
AQ7275 Operation GuideMeasurement PreparationMeasurement Condition Setup Trace Acquisition Trace Analysis Trace Printing and Storage
Multiple wavelengths measurement can be executed and saved by one button
40
Measurement
Change wavelength
Save trace
1st wavelength
End
Up to 3 wavelengths
Same conditions
Multi Wavelength ModeMulti Wavelength Mode
AQ7275 Operation GuideMeasurement PreparationMeasurement Condition Setup Trace Acquisition Trace Analysis Trace Printing and Storage
One-Button Measurement (Macro) is to pre-program multiple testing procedures to be executed by only one button.
Three Macros are available to run. One Macro contains 5 jobs which have individually sets of predefined
measurement/analysis/file output setup. These 5 jobs are performed sequentially.
Measurement conditions need to be defined prior to the execution.
41
AQ7275 Operation Guide
One-Button Measurement (Macro) One-Button Measurement (Macro)
Measurement PreparationMeasurement Condition Setup Trace Acquisition Trace Analysis Trace Printing and Storage
42
Reference
Dynamic range(SNR = 1)
2.6dB
Noise peak
AQ7275 Operation Guide
Dynamic range refers to the range of optical power levels that can be measured. The larger the dynamic range, the greater the distance that optical pulses can be measured over.
Dynamic Range Dynamic Range Dynamic Range Dead Zone
Measurement Preparation Trace Acquisition Trace Analysis Trace Printing and Storage
Note:• Dynamic range is dependent to pulse width and increases as the pulse width widens • OTDR Distance Measurement Capability =
(dB/km) Loss nAttenuatio(dB) Range Dynamic
Measurement Condition Setup
43
Note: Event dead zone is dependent to pulse width and increases as the pulse width widens
AQ7275 Operation Guide
Why occurs? Photodiode Detector effect (Camera Flash Example)
1) Event Dead Zone
The minimum distance after a Fresnel reflection where an OTDR can detect another event. In other words, it is the minimum length of fiber needed between two reflective events.
Dead ZoneDead ZoneDynamic Range Dead Zone
Measurement Preparation Trace Acquisition Trace Analysis Trace Printing and StorageMeasurement Condition Setup
44
AQ7275 Operation Guide
2) Attenuation Dead Zone
The minimum distance after a Fresnel reflection where an OTDR can accurately measure the loss of a consecutive event.
Dead ZoneDead ZoneDynamic Range Dead Zone
Measurement Preparation Trace Acquisition Trace Analysis Trace Printing and StorageMeasurement Condition Setup
Transmission & Connector Loss
1310nm: 0.3dB/km (typical) 1550nm: 0.2dB/km (typical)
Longer wavelength has smaller transmission & connector loss
Bending loss
Longer wavelength gives higher bending loss
45
Select the measurement wavelength based on the wavelength(s) used for the designated fiber.
Wavelengths Wavelengths
Fault by bending
1550nm
1310nm
splice connectorconnector
1550nm
1310nm
AQ7275 Operation Guide
Wavelengths Pulse WidthDistance Range Sampling Interval Averaging Method
Measurement PreparationMeasurement Condition Setup Trace Acquisition Trace Analysis Trace Printing and Storage
MEASUREMENT SETUP
46
Distance range
Fiber length
AQ7275 Operation Guide
If the length of the fiber under test is known, set the distance range longer but closest to the distance.Example: Optical fiber under test : 15km Distance range should be ・・・、 10km 、 20km 、 40km 、・・・
If the length of optical fiber is unknown, use Auto range.
Distance RangeDistance RangeWavelengths Pulse WidthDistance Range Sampling Interval Averaging Method
Measurement PreparationMeasurement Condition Setup Trace Acquisition Trace Analysis Trace Printing and Storage
MEASUREMENT SETUP
47
In order to reduce the reflection, index-matching gel can be used at the reflection point. In addition, the injected power can be reduced by selecting a shorter pulsewidth, selecting a reduced power settingon the OTDR (some OTDRs provide this option), or adding attenuation in the fiber before the reflection.
To avoid the appearance of the ghost reflection due to incorrect range setting, set the distance range in more than double of the optical fiber.Example: Fiber under test : 4km → Distance range should be: 5km, 10km, 20km 、・・・
AQ7275 Operation Guide
False Fresnel reflections, termed ghosts, on the trace waveform may be observed from time to time. Ghosts can be the result of a strong reflective event on the fiber, causing a large amount of reflected light to be sent back to the OTDR, or an incorrect range setting during acquisition.
Distance Range – Avoiding Ghost ReflectionDistance Range – Avoiding Ghost ReflectionWavelengths Pulse WidthDistance Range Sampling Interval Averaging Method
Measurement PreparationMeasurement Condition Setup Trace Acquisition Trace Analysis Trace Printing and Storage
MEASUREMENT SETUP
48
AQ7275 Operation Guide
Pulse width duration controls the amount of light that will be injected into the fiber. The longer the pulse width means the more the light energy injected.
The pulse width has the following characteristics.Short pulse width:
Allows events (reflection point and loss) that are close together to be distinguish/measured separately. However, long distance may not be measured.
Long pulse width: Long distance can be measured. However, multiple events that are close together may appear as a
single event.
Optimal pulse width is acquired by using pulse width Auto function.
Pulse WidthPulse WidthWavelengths Pulse WidthDistance Range Sampling Interval Averaging Method
Measurement PreparationMeasurement Condition Setup Trace Acquisition Trace Analysis Trace Printing and Storage
MEASUREMENT SETUP
49
Pulse width 10ns
OTDR40m 20m15m
AQ7275 Operation Guide
Pulse width 50ns
Pulse width 100ns
Pulse Width - Pulse Width - Example of close event locations Example of close event locations Measurement results by pulse width of 10ns, 50ns and 100ns on the same Fiber under test.
Wavelengths Pulse WidthDistance Range Sampling Interval Averaging Method
Measurement PreparationMeasurement Condition Setup Trace Acquisition Trace Analysis Trace Printing and Storage
MEASUREMENT SETUP
50
Pulse width 4us
AQ7275 Operation Guide
Pulse width 100ns
Pulse Pulse Width - - Example of long fiber measurementExample of long fiber measurementMeasurement results of approximately 40km fiber by pulse width of 4us and 100ns.
Wavelengths Pulse WidthDistance Range Sampling Interval Averaging Method
Measurement PreparationMeasurement Condition Setup Trace Acquisition Trace Analysis Trace Printing and Storage
MEASUREMENT SETUP
51
AQ7275 Operation Guide
Relationship among Pulse Width, Dynamic Range and Relationship among Pulse Width, Dynamic Range and Dead ZoneDead Zone
(Typical value)(Typical value)
Wavelengths Pulse WidthDistance Range Sampling Interval Averaging Method
Measurement PreparationMeasurement Condition Setup Trace Acquisition Trace Analysis Trace Printing and Storage
Pulse Width Dynamic Range 1.31/1.55μ m
Dead ZoneAttenuation / Event
3 ns 9/8 dB 7/0.8 m
10ns 12/11d B 10/1.5m
20ns 14/13d B 12/3m
100ns 18/17d B 32/12m
1 μ s 23/22d B 120/100m
20 μ s 40/38d B 2000/250m
MEASUREMENT SETUP
52
AQ7275 Operation Guide
Resolution vs. fault-finding efficiency: (a) 5-meter resolution (higher resolution); (b) 15-meter resolution (lower resolution)
High Resolution: The shortest possible measurement sampling interval is set for the fiber under test.
Normal: The optimal measurement sampling interval is set automatically for the fiber under test.
Sampling Interval/ResolutionSampling Interval/ResolutionMinimum distance between two consecutive sampling points acquired.This parameter is crucial, as it defines the ultimate distance accuracy and fault-findingcapability of the OTDR.
Wavelengths Pulse WidthDistance Range Sampling Interval Averaging Method
Measurement PreparationMeasurement Condition Setup Trace Acquisition Trace Analysis Trace Printing and Storage
MEASUREMENT SETUP
53
Setting Averaging (High-Speed, High-Reflection)
AQ7275 Operation Guide
Averaging MethodAveraging MethodWavelengths Pulse WidthDistance Range Sampling Interval Averaging Method
Measurement PreparationMeasurement Condition Setup Trace Acquisition Trace Analysis Trace Printing and Storage
MEASUREMENT SETUP
Refractive index
Fiber length (m)
1.480 10,000.00
1.470 10,068.27
1.465 10.102.38
54
AQ7275 Operation Guide
Refractive index has to be set to measure the distance of the fiber under test ACCURATELY.A typical SMF group refraction index N value is around 1.46.
Index of Reflection (IOR) Index of Reflection (IOR) Index of ReflectionBackscatter Level Event Search ConditionApproximation Method
Measurement PreparationMeasurement Condition Setup Trace Acquisition Trace Analysis Trace Printing and Storage
Example of measuring a 10km fiber with different refractive indexes.
ANALYSIS SETUP
55
AQ7275 Operation Guide
Backscatter level has to be set to measure the return loss of the connector CORRECTLY.A typical Backscatter level value is as follow
Backscatter LevelBackscatter Level
Wavelengths (nm)
Backscatter(dB) @ 1us Pulse width
850 - 32
1300 - 41
1310 - 50
1490 - 52
1550 - 52
1625 - 53
1650 - 53
Index of ReflectionBackscatter Level Event Search ConditionApproximation Method
Measurement PreparationMeasurement Condition Setup Trace Acquisition Trace Analysis Trace Printing and Storage
Note:Backscatter level @ 1us = Backscatter level @ 1ns + 30dBFor example, -50dB Backscatter level @ 1us is equal to -80dB Backscatter level @ 1ns
ANALYSIS SETUP
56
ApproximationMethod
Least Square Approximation (LSA)
Calculate the loss between two points with the least
square method
Two Point Approximation (TPA)
Calculate the loss between two points by taking the difference
of two points loss values
4 points event loss ○ ×
Loss between 2 points × ○
①
②
①
②
①②
①②
AQ7275 Operation Guide
Index of ReflectionBackscatter Level Event Search ConditionApproximation Method
Measurement PreparationMeasurement Condition Setup Trace Acquisition Trace Analysis Trace Printing and Storage
Approximation MethodApproximation MethodANALYSIS SETUP
57
AQ7275 Operation Guide
Index of ReflectionBackscatter Level Event Search ConditionApproximation Method
Measurement PreparationMeasurement Condition Setup Trace Acquisition Trace Analysis Trace Printing and Storage
Event Search ConditionEvent Search ConditionANALYSIS SETUP
58
AQ7275 Operation GuideMeasurement PreparationMeasurement Condition Setup Trace Acquisition Trace Analysis Trace Printing and Storage
Real Time Averaging
59
AQ7275 Operation GuideMeasurement PreparationMeasurement Condition Setup Trace Acquisition Trace Analysis Trace Printing and Storage
Real Time Averaging
60
AQ7275 Operation GuideMeasurement PreparationMeasurement Condition Setup Trace Acquisition Trace Analysis Trace Printing and Storage
Zooming In/Out & Moving TraceMeasuring the Distance and Loss between Two Points Measuring the Splice LossMeasuring the Return Loss
61
AQ7275 Operation GuideMeasurement PreparationMeasurement Condition Setup Trace Acquisition Trace Analysis Trace Printing and Storage
Zooming In/Out & Moving TraceMeasuring the Distance and Loss between Two Points Measuring the Splice LossMeasuring the Return Loss
62
AQ7275 Operation GuideMeasurement PreparationMeasurement Condition Setup Trace Acquisition Trace Analysis Trace Printing and Storage
Zooming In/Out & Moving TraceMeasuring the Distance and Loss between Two Points Measuring the Splice LossMeasuring the Return Loss
63
AQ7275 Operation GuideMeasurement PreparationMeasurement Condition Setup Trace Acquisition Trace Analysis Trace Printing and Storage
Zooming In/Out & Moving TraceMeasuring the Distance and Loss between Two Points Measuring the Splice LossMeasuring the Return Loss
64
AQ7275 Operation GuideMeasurement PreparationMeasurement Condition Setup Trace Acquisition Trace Analysis Trace Printing and Storage
65
AQ7932 OTDR emulation software helps to analyze data and create reports.
Trace analysis
Total table
Trace report
AQ7275 Operation Guide – Waveform Analysis & Reporting
66
Agenda
Introduction to OTDRIntroduction to OTDR
AQ7275 IntroductionAQ7275 Introduction
AQ7275 FeaturesAQ7275 Features
AQ7275 Operation GuideAQ7275 Operation Guide
AQ7275 Advance OperationAQ7275 Advance Operation
Questions and AnswerQuestions and Answer
67
AQ7275 Advance Operation
2 Ways Trace Analysis - For Accurate Splice Loss Measurement by Bi-directional Testing
Merges the two traces measured from both directions and finds the correct splice loss.
Connection loss in lines where optical fibers of differing backscatter coefficients are connected can differ depending on the direction. In such cases, you can accurately determine the loss by measuring in both directions and taking an average
Multi Trace Analysis - For Evaluation of Multi core Fiber/Bending Loss
Up to four traces can be overlaid on the display for analysis and comparison.
This is useful for evaluating connection point locations and loss after installing multicore fiber.
Advance AnalysisMulti fiber Measurement FunctionAQ7275 TipsMeasurement Examples
68
Differential Trace Analysis - For Evaluation of Aged Deterioration/Bending LossDisplays the difference between two
specified traces.
Makes it simple to check aged deterioration of fibers or connection points, or fluctuation in loss between fibers, and other phenomena.
Section Analysis - For Evaluation of Total Return Loss
Finds the total return loss in specificportions of the fiber.
This type of evaluation is often requestedbecause the multiple reflections fromoptical fiber networks can affect signallight from transmitters (cable TV etc.).
AQ7275 Advance OperationAdvance AnalysisMulti fiber Measurement FunctionAQ7275 TipsMeasurement Examples
69
AQ7275 Advance Operation
Procedure1. Press the Next 1/2 soft key.2. Press the Advanced Analysis soft key. A soft key menu
for the waveform analysis appears.3. Press the selected Advance Analysis soft key.
Advance AnalysisMulti fiber Measurement FunctionAQ7275 TipsMeasurement Examples
70
AQ7275 Advance Operation
Automatically performs measurements and data-filling according to a pre-established file name table.
Advance AnalysisMulti fiber Measurement FunctionAQ7275 TipsMeasurement Examples
71
AQ7275 Advance Operation
Project Setup Procedure1. On Top Menu, press the Multicore Fiber Meas soft key.2. Create new project by pressing New Project soft key.3. Setup Project name and destination folder for saving
measurement results.4. Enter the Fiber information, select Wavelength, and setup file
name type.
Advance AnalysisMulti fiber Measurement FunctionAQ7275 TipsMeasurement Examples
72
AQ7275 Advance Operation
Project Setup Procedure4. Setup Measurement Settings and Analysis Settings5. Setup Project name and destination folder for saving
measurement results.6. Final check the project setup and select complete.
Advance AnalysisMulti fiber Measurement FunctionAQ7275 TipsMeasurement Examples
73
AQ7275 Advance OperationAdvance AnalysisMulti fiber Measurement FunctionAQ7275 TipsMeasurement Examples
74
Advance AnalysisMulti fiber Measurement FunctionAQ7275 TipsMeasurement Examples
AQ7275 Advance Operation
Setting Up Dummy Fiber as Reference Setting Up Dummy Fiber as Reference PointPointProcedure
1. After Trace acquisition, run EVENT ANALYSIS2. Move CURSOR to EVENT that identify the connection between dummy
fiber and Fiber Under Test.3. Select Distance Ref Setup soft key.
Note: Distance Ref Setup will reset once the distance range setting is changed
75
Advance AnalysisMulti fiber Measurement FunctionAQ7275 TipsMeasurement Examples
AQ7275 Advance Operation
Differentiating Index of Reflection of Each Differentiating Index of Reflection of Each SectionSectionProcedure
1. After Trace acquisition, run EVENT ANALYSIS2. Select Screen soft key to LIST.3. Setup the section IOR accordingly4. Distance information will change accordingly
76
AQ1200 Advance Operation
Analyzing Trace Measurement with/out Dummy Fiber (1 of Analyzing Trace Measurement with/out Dummy Fiber (1 of 2)2)
Advance AnalysisMulti fiber Measurement FunctionAQ7275 TipsMeasurement Examples
77
AQ7250mini-OTDRAQ7250mini-OTDRAQ7250mini-OTDRAQ7250mini-OTDRAQ7250mini-OTDRAQ7250mini-OTDRAQ7250mini-OTDR
100 m
4 0m
200 m
550 m
850 m
1k m
2k m
終端
終端 8分岐スプリッタ
40m2Km
1Km850m
550m
200m100m
Terminate
Terminate1 x 8 Splitter
Home
PW:100ns
OTDR measurement over the splitter (PON) – CO to OTDR measurement over the splitter (PON) – CO to PremisePremise
AQ1200 Advance OperationAdvance AnalysisMulti fiber Measurement FunctionAQ7275 TipsMeasurement Examples
78
Pulse width=
100ns
・・ ・・
ONU
OLT
2nd Splitter1st Splitter
Advance AnalysisMulti fiber Measurement FunctionAQ7275 TipsMeasurement Examples
AQ7275 Advance Operation
OTDR measurement over the splitter (PON) – Premise OTDR measurement over the splitter (PON) – Premise to COto CO
79
AQ7250mini-OTDRAQ7250mini-OTDRAQ7250mini-OTDRAQ7250mini-OTDRAQ7250mini-OTDRAQ7250mini-OTDRAQ7250mini-OTDR
100 m
4 0m
200 m
550 m
850 m
1k m
2k m
終端
終端 8分岐スプリッタ
40m2Km
1Km850m
550m
200m100m
Terminate
Terminate1 x 8 Splitter
Home
PW:100ns
Advance AnalysisMulti fiber Measurement FunctionAQ7275 TipsMeasurement Examples
OTDR measurement over the splitter (PON) – CO to OTDR measurement over the splitter (PON) – CO to PremisePremise
AQ7275 Advance Operation
80
1.625um, Pw: 1us, In-service light: -19dBm
Can not measure
AQ7275 without Cut-off Filter
1.625um, Pw: 1us, In-service light: -19dBm
Can measure
AQ7275 with Built-in Cut-off Filter
AQ7275 Advance OperationAdvance AnalysisMulti fiber Measurement FunctionAQ7275 TipsMeasurement Examples
Active line measurement with/out Built-in Cut-off FilterActive line measurement with/out Built-in Cut-off Filter
81
Agenda
Introduction to OTDRIntroduction to OTDR
AQ7275 IntroductionAQ7275 Introduction
AQ7275 FeaturesAQ7275 Features
AQ7275 Operation GuideAQ7275 Operation Guide
AQ7275 Advance OperationAQ7275 Advance Operation
Questions and AnswerQuestions and Answer
82
End of Presentation
Thank You !