Exfo MAX-710-P Manuel d'utilisateur Page 188
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Analyzing the Results Manually
176 MAX-700
Getting Attenuation (Two-Point and Least-Square Approximation)
Getting Attenuation (Two-Point and
Least-Square Approximation)
A two-point attenuation measurement gives the reduction in Rayleigh
backscatter level as a function of distance (always expressed in dB/km to
follow the standards of the fiber-optic industry) between two selected
points. Only those two points are used to perform the calculation and there
is no averaging.
The least-square approximation (LSA) method measures the attenuation
(loss over distance) between two points by fitting a straight line in the
backscatter data between markers A and B. The LSA attenuation
corresponds to the difference in power ( dB) over the distance between
two points.
The LSA method, when compared to the two-point method, gives an
average measurement and is more reliable when there is a high level of
noise. However, it should not be used if an event such as an echo appears
between the two markers.
- User Guide 1
- End-User License Agreement 3
- MAX-700 ix 9
- Contents 10
- Certification Information 11
- 1 Introducing the MAX-700 13
- Battery LED 14
- Touchscreen 14
- Introducing the MAX-700 15
- LED Indicators Description 17
- Function Buttons Description 18
- Trace Acquisition Modes 19
- Optional Software Package 19
- Data Post-Processing 19
- OTDR Basic Principles 20
- Power Sources 22
- 2 Safety Information 25
- Laser Safety Information 26
- Electrical Safety Information 27
- 3 Getting Started with Your 29
- 18 MAX-700 30
- Device Details 31
- MAX-700 21 33
- 22 MAX-700 34
- MAX-700 23 35
- Turning On or Off the Unit 36
- 26 MAX-700 38
- MAX-700 29 41
- 30 MAX-700 42
- MAX-700 31 43
- 32 MAX-700 44
- Activating Software Options 45
- 34 MAX-700 46
- 36 MAX-700 48
- 38 MAX-700 50
- MAX-700 43 55
- 44 MAX-700 56
- MAX-700 45 57
- 46 MAX-700 58
- 48 MAX-700 60
- Setting Macrobend Parameters 61
- 50 MAX-700 62
- 5 Testing Fibers in Auto Mode 63
- 52 MAX-700 64
- MAX-700 53 65
- 6 Testing Fibers in Advanced 67
- 56 MAX-700 68
- MAX-700 57 69
- 58 MAX-700 70
- 60 MAX-700 72
- MAX-700 61 73
- Acquisition Time 75
- MAX-700 65 77
- Parameter-setting dials 77
- Selection 77
- MAX-700 67 79
- Acquisition 80
- MAX-700 69 81
- Setting Pass/Fail Thresholds 82
- when you open a trace file 83
- Test Default Minimum Maximum 83
- 72 MAX-700 84
- MAX-700 75 87
- 76 MAX-700 88
- MAX-700 77 89
- 78 MAX-700 90
- 80 MAX-700 92
- Finder Traces 94
- MAX-700 83 95
- Fault Finder File Name 96
- MAX-700 85 97
- 86 MAX-700 98
- Check for Fault Finder 99
- 88 MAX-700 100
- Keyboard 101
- 90 MAX-700 102
- MAX-700 91 103
- Selecting the Distance Units 104
- 8 Customizing the OTDR 107
- Application 107
- 96 MAX-700 108
- MAX-700 97 109
- 98 MAX-700 110
- 100 MAX-700 112
- MAX-700 101 113
- 102 MAX-700 114
- MAX-700 103 115
- 104 MAX-700 116
- 106 MAX-700 118
- 9 Analyzing Traces and Events 119
- Graph View 120
- Linear View 122
- MAX-700 111 123
- Summary Table 124
- MAX-700 113 125
- Events Tab 126
- Analyzing Traces and Events 129
- Measure Tab 130
- Trace Info. Tab 130
- MAX-700 119 131
- 120 MAX-700 132
- Selecting the Default View 133
- Acquisitions 135
- 124 MAX-700 136
- Using Zoom Controls 137
- Zoom window 140
- MAX-700 129 141
- To d i s p l a y a bla c k 141
- Customizing the Event Table 142
- Displaying or Hiding a Trace 144
- 134 MAX-700 146
- MAX-700 135 147
- MAX-700 137 149
- 138 MAX-700 150
- MAX-700 139 151
- IMPORTANT 152
- Modifying Events 153
- 142 MAX-700 154
- Inserting Events 157
- Deleting Events 159
- Managing Comments 160
- MAX-700 151 163
- Loss and attenuation 163
- Threshold at 0.05 dB 165
- Threshold at 0.1 dB 165
- Threshold at 0.15 dB 165
- 154 MAX-700 166
- MAX-700 155 167
- 156 MAX-700 168
- MAX-700 157 169
- Reflective Ends of Fiber 170
- Swapping Traces 173
- Opening Trace Files 174
- File Type Zoom Marker 175
- 164 MAX-700 176
- 10 Analyzing the Results 179
- Manually 179
- 168 MAX-700 180
- Using Markers 181
- 170 MAX-700 182
- Least-Square Approximation) 183
- 172 MAX-700 184
- MAX-700 173 185
- A-B LSA loss 185
- 174 MAX-700 186
- Getting Reflectance 190
- MAX-700 179 191
- OTDR Test Application 193
- OTDR Trace File Compatibility 194
- File generated with 195
- 184 MAX-700 196
- 12 Creating and Generating 197
- 186 MAX-700 198
- Generating a Report 199
- MAX-700 189 201
- 13 Using the OTDR as a Light 205
- 194 MAX-700 206
- 14 Setting Up Your Unit 209
- 198 MAX-700 210
- Setting Up Your Unit 211
- 6b. Tap the Advanced button 211
- 200 MAX-700 212
- MAX-700 201 213
- Recalibrating the Touchscreen 214
- 4. Tap Calibrate 215
- 204 MAX-700 216
- Right-Click Feature 217
- 4. Select the Setting tab 218
- 5. Tap the Option button 218
- MAX-700 207 219
- 208 MAX-700 220
- MAX-700 209 221
- 210 MAX-700 222
- MAX-700 211 223
- To b ro ws e 223
- Configuring Network Printers 225
- 214 MAX-700 226
- 216 MAX-700 228
- To add new input languages: 229
- 3. Select the Languages tab 229
- MAX-700 219 231
- 220 MAX-700 232
- Setting Date and Time Formats 233
- 222 MAX-700 234
- 224 MAX-700 236
- MAX-700 225 237
- 226 MAX-700 238
- MAX-700 227 239
- MAX-700 229 241
- 230 MAX-700 242
- Setting Other Parameters 243
- 15 Working with Your Unit 245
- 234 MAX-700 246
- Printing Documents 246
- Viewing PDF Files 248
- Taking Screen Captures 249
- 238 MAX-700 250
- Captures 252
- MAX-700 241 253
- 242 MAX-700 254
- Working with Your Unit 255
- Reading Audio and Video Files 257
- Browsing the Web 260
- Accessing Other Tools 261
- Power Meter and VFL 263
- MAX-700 253 265
- 18 Managing Data 267
- 256 MAX-700 268
- MAX-700 257 269
- 258 MAX-700 270
- 260 MAX-700 272
- MAX-700 261 273
- Managing Data 274
- 8a. Tap Browse 275
- 264 MAX-700 276
- MAX-700 265 277
- 266 MAX-700 278
- MAX-700 267 279
- 9. Tap Connect 281
- 270 MAX-700 282
- 272 MAX-700 284
- MAX-700 273 285
- 274 MAX-700 286
- 276 MAX-700 288
- MAX-700 279 291
- 280 MAX-700 292
- 2. Tap USB Data Mover 293
- 3. Tap User Preferences 293
- 4a. Tap Add a Folder 294
- MAX-700 283 295
- 284 MAX-700 296
- MAX-700 285 297
- MAX-700 287 299
- MAX-700 289 301
- 290 MAX-700 302
- Working With TightVNC 302
- Computer 304
- MAX-700 295 307
- 296 MAX-700 308
- Accessing Your Unit Remotely 309
- 3. Select the Exceptions tab 309
- 20 Maintenance 311
- Recharging the Main Battery 315
- Replacing Batteries 317
- 306 MAX-700 318
- 308 MAX-700 320
- Verifying Your MAX-700 321
- 310 MAX-700 322
- Verif ying Your MAX-700 323
- 312 MAX-700 324
- 314 MAX-700 326
- 316 MAX-700 328
- Recalibrating the Unit 329
- Recycling and Disposal 329
- 21 Troubleshooting 331
- OTDR-Related Problems 333
- 322 MAX-700 334
- Solving Common Problems 334
- Problem Cause Solution 334
- MAX-700 325 337
- 326 MAX-700 338
- Troubleshooting 339
- 328 MAX-700 340
- MAX-700 329 341
- 330 MAX-700 342
- MAX-700 331 343
- 332 MAX-700 344
- MAX-700 333 345
- Transportation 346
- 22 Warranty 347
- Service and Repairs 349
- 338 MAX-700 350
- A Technical Specifications 351
- GENERAL SPECIFICATIONS 352
- VISUAL FAULT LOCATOR (VFL) 352
- ACCESSORIES 352
- LASER SAFETY 352
- B Description of Event Types 353
- Span Start 354
- Span End 354
- Short Fibers 354
- Continuous Fiber 355
- End of Analysis 356
- Non-Reflective Event 357
- Reflective Event 358
- Positive Event 359
- Launch Level 360
- Fiber Section 361
- Merged Event 362
- MAX-700 351 363
- Pass/Fail Tests 364
- All Event Types Are Tested 365
- 354 MAX-700 366
- MAX-700 355 367
- MAX-700 359 371
- MAX-700 361 373
- MAX-700 363 375
- MAX-700 365 377
- ₼⦌␂ℝ☀⹂䓸德棟Ⓟ䤓屓⸩ 379
- MARKING REQUIREMENTS 380
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