Luna 4600 - Page 127

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Optical Backscatter Reflectometer 4600 117

User Guide

If the base folder is

“C:\LPA_Data”,

then the files are saved

to “C:\LPA_Data\ device2”.

Main Page

Table of Contents3
System Overview11
The Control Software12
Time Domain Data14
Frequency Domain14
Frequency Domain Resolution15
Assembly and Startup17
Components List17
Setting up the OBR21
Initial Startup22
Software Guide27
Window Features28
System Control29
Data Processing31
Display Options31
Graphs33
The Menu Bar37
The File Menu37
The Edit Menu38
The Options Menu38
The Tools Menu40
The Help Menu41
Performing Measurements43
Setting up43
Aligning the OBR Optics44
Instrument Configuration44
Calibrating the System45
Calibration Files46
Conditions that Require Calibration46
Consideration Prior to Calibrating46
The Calibration Procedure47
Checking the Calibration48
Storing Multiple Calibrations49
Acquiring Data50
Single-Scan Mode51
Continuous Scan Mode53
Fast Scan Mode54
Spot Scan Mode54
Extended Range Spot Scan Mode56
Frequency Domain Windowing57
Distributed Sensing Measurements58
Temperature Change and Strain Coefficients59
Distributed Sensing Technique61
Gauge Length62
Distributed Sensing Examples64
Data Processing and Display69
Displaying Multiple Traces69
Moving Data in Local Memory69
Displaying Stored Data70
Trace Details71
Saving and Loading Data Files72
Saving Data72
Loading Saved Data75
Spreadsheet File Data76
Displaying Two Parameters in Lower Graph76
Manipulating Plots77
Updating Lower Graph77
Parameter Selection78
Scaling Plot Axes79
Autoscaling79
Manual Scaling80
Using Zoom Tools80
Using Cursors, Legends and Other Buttons82
Cursors82
Legend84
Adjusting Group Index85
Data Decimation85
Adjusting Spatial Resolution86
Printing Graphs86
Lightpath Analysis Software Guide87
Lightpath Analysis Tutorial87
Adjusting a Parameter Configuration File89
Loading a File90
Data Display91
Changing Data Processing Parameters and Tolerances92
Why a Feature Failed94
Editing General Tolerances95
Saving Lightpath Files96
Changing from a Configuration File to a Reference File97
Editing Feature-Specific Tolerances98
Comparing a New Trace to the Reference101
Viewing Segment Details101
Comparing a Failing Trace to the Reference103
Comparing Traces Using the Trace Comparison Window103
Editing a Reference Trace: Processing Parameters and General Tolerances104
Setting the Maximum Device Length105
Resetting the Default Parameters106
Suggested Setup and Use107
Description of Processing Parameters and Tolerances107
Characteristic Length (M)108
Drop Length (M)109
Feature Extract Length (M)110
Peak Detect Ratio (Lin)111
Peak Dead Zone (M)112
Drop Detect Ratio (Lin)113
Integration Length (M)114
Return Loss Type115
Peak Tolerance (Db)116
Drop Tolerance (Db)117
Loss Tolerance (Db)118
Splice Loss Tolerance (Db)119
Location Tolerance (M)120
Maximum Length (M)121
Remote Commands121
Remote Commands Unique to LPA122
Controlling the OBR Remotely129
Prerequisites for Remote Control Setup129
Remote Control Setup Configuration130
Remote Control Commands for the OBR130
Standard Commands133
System Level Commands136
Configuration Commands144
Data Capture and Retrieval Commands154
Alphabetical Command Summaries173
Measurement Theory179
Optical Network for OBR180
Fiber Optic Interferometry183
Fiber Interferometry: References183
Resolution Bandwidth Calculations183
Spatial Resolution Calculations184
Integration Width (or Sensing Range)184
Return Loss and Differential Loss184
Standard Parameter Calculations185
Time Domain Amplitude and Amplitude (Db)190

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