Exfo FTB-7000 OTDR Series for FTB-500 Manuel d'utilisateur Page 210
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Analyzing the Results Manually
196 OTDR
Getting Reflectance
Getting Reflectance
Reflectance is the ratio of reflected light to input light.
Note: When performing reflectance measurements on recalled traces from
non-EXFO test equipment that were saved in Telcordia (Bellcore) format,
the results displayed could be less accurate than with EXFO file format.
To get reflectance:
1. From the main window, go to the Graph tab and press the Measure
button
2. In the Measurements section, press the Refl. button. Markers a, A and
B appear on the graph.
3. Zoom in and position marker A on the linear area preceding the event
to be measured. For more information, see Using Zoom Controls on
page 137 and Using Markers on page 187.
4. Position submarker a at the beginning of the linear area preceding the
event to be measured.
5. Position marker B at the peak of the reflective event to be measured.
Note: Using this procedure, you can measure the reflectance of all the events in a
merged reflective fault event.
Note: For non-reflective events, ∗∗∗∗∗ will be displayed.
- User Guide 1
- OTDR Series for FTB-500 1
- Contents 3
- DECLARATION OF CONFORMITY 10
- Domain Reflectometer 15
- Other models 16
- Main Features 17
- Trace Acquisition Modes 18
- Data Post-Processing 18
- Available OTDR Models 18
- OTDR Basic Principles 21
- 2 Safety Information 25
- Safety Information 26
- 3 Getting Started with Your 27
- Turn retaining screw knob 30
- FTB-500 left panel 30
- Turn retaining screw knob(s) 32
- Starting the OTDR Application 34
- Split Bar 36
- Status Bar 36
- Exiting the Application 37
- 4 Setting Up Your OTDR 39
- Defining Cables 43
- Defining the Cable Location 44
- Measurements 69
- 5 Testing Fibers in Auto Mode 71
- 6 Testing Fibers in Advanced 77
- Acquisition Time 85
- Selection 87
- Parameters setting dials 87
- Acquisition 90
- Setting Pass/Fail Thresholds 92
- Information 99
- Selecting the Operation Mode 100
- IMPORTANT 102
- Retesting Channels 105
- 7Testing Fibers in Template 107
- Restrictions of Template Mode 108
- Processing Traces 110
- Acquiring the Reference Trace 111
- 100 OTDR 114
- OTDR 101 115
- 102 OTDR 116
- OTDR 103 117
- 104 OTDR 118
- OTDR 105 119
- 106 OTDR 120
- OTDR 107 121
- 8 Customizing the Application 123
- 110 OTDR 124
- OTDR 111 125
- 112 OTDR 126
- Discarding Unnamed Trace 127
- 114 OTDR 128
- OTDR 115 129
- Selecting the Distance Units 130
- 118 OTDR 132
- OTDR 119 133
- 120 OTDR 134
- OTDR 121 135
- OTDR 123 137
- Acquisitions 138
- Defining OTDR Setups 139
- 126 OTDR 140
- Selecting an OTDR Setup 142
- 9 Analyzing Traces and Events 143
- 130 OTDR 144
- Event Pane 145
- Analyzing Traces and Events 148
- Measure Pane 149
- Trace Info Pane 149
- Viewing Test Results 150
- Using Zoom Controls 151
- 138 OTDR 152
- 140 OTDR 154
- OTDR 141 155
- To di s pl a y a 155
- Customizing the Event Table 156
- 144 OTDR 158
- OTDR 145 159
- Pulse width 159
- 146 OTDR 160
- Displaying or Hiding a Trace 161
- 148 OTDR 162
- OTDR 149 163
- 150 OTDR 164
- OTDR 151 165
- 152 OTDR 166
- OTDR 153 167
- Trace information 168
- Trace settings information 168
- OTDR 155 169
- 156 OTDR 170
- OTDR 157 171
- 160 OTDR 174
- OTDR 161 175
- Inserting Events 177
- 166 OTDR 180
- 168 OTDR 182
- ³ Threshold at 0.05 dB 182
- ³ Threshold at 0.1 dB 182
- ³ Threshold at 0.15 dB 182
- OTDR 169 183
- OTDR 171 185
- 172 OTDR 186
- Reflective Ends of Fiber 188
- OTDR 177 191
- Entering Comments 192
- Opening Trace Files 193
- 180 OTDR 194
- Type of file Zoom Marker 194
- OTDR 181 195
- 182 OTDR 196
- Defining a Reference Trace 197
- 184 OTDR 198
- 10 Analyzing the Results 199
- Manually 199
- 186 OTDR 200
- Using Markers 201
- 188 OTDR 202
- Least-Square Approximation) 203
- 190 OTDR 204
- A-B LSA loss 205
- OTDR 191 205
- 192 OTDR 206
- Getting Reflectance 210
- OTDR 197 211
- ORL between 211
- Total return loss 211
- 11 Managing Trace Files 213
- 202 OTDR 216
- Managing Trace Files 217
- OTDR Trace File Compatibility 218
- File generated with 219
- 208 OTDR 222
- OTDR 209 223
- Selected 223
- 210 OTDR 224
- OTDR 211 225
- Customizing the Report 226
- Compressed 227
- Multitrace 227
- 214 OTDR 228
- 216 OTDR 230
- 218 OTDR 232
- OTDR 219 233
- Printing a Report 234
- OTDR 221 235
- Current fiber 235
- Current trace 235
- 222 OTDR 236
- 13 Using the OTDR as a Light 237
- Source or VFL 237
- 224 OTDR 238
- 226 OTDR 240
- OTDR 227 241
- 228 OTDR 242
- OTDR 229 243
- 230 OTDR 244
- Item To be valid 245
- 232 OTDR 246
- OTDR 233 247
- 234 OTDR 248
- OTDR 235 249
- OTDR 237 251
- To set a fiber span: 252
- OTDR 239 253
- 240 OTDR 254
- Changing Event Tables 256
- Parameters 257
- OTDR 245 259
- 246 OTDR 260
- OTDR 247 261
- Saving Traces 262
- Documenting Results 264
- Creating a Report 264
- Remote Control 265
- OTDR 253 267
- 254 OTDR 268
- 16 Maintenance 273
- Verifying Your OTDR 276
- Verif yi ng Your OTDR 277
- 264 OTDR 278
- 266 OTDR 280
- 268 OTDR 282
- Recalibrating the Unit 284
- Recycling and Disposal 285
- 17 Troubleshooting 287
- 274 OTDR 288
- Solving Common Problems 288
- Problem Cause Solution 288
- Error Messages 290
- 278 OTDR 292
- ³ Stop any acquisition that 292
- Viewing Online Documentation 293
- FTB-7X00D-XX-XX-XX 294
- FTB-7200D-XX-XX-XX 294
- FTB-7X00E-XXB-XX-XX 294
- Transportation 295
- 18 Warranty 297
- Service and Repairs 299
- 286 OTDR 300
- A Technical Specifications 301
- Technical Specifications 302
- B Description of Event Types 307
- Span Start 308
- Span End 308
- Short Fibers 308
- Continuous Fiber 309
- End of Analysis 310
- Non-Reflective Event 311
- Reflective Event 312
- Positive Event 313
- Launch Level 314
- Fiber Section 315
- Merged Event 316
- OTDR 303 317
- Pass/Fail Tests 318
- All Event Types Are Tested 319
- 306 OTDR 320
- OTDR 307 321
- C SCPI Command Reference 325
- Quick Reference Command Tree 326
- SCPI Command Reference 327
- CATalog? 453 331
- Command Parameter(s) P 331
- :ABORt[1..n] 332
- :CALCulate[1..n]:ANAlysis 333
- [:UNIDirectional] 333
- :CALCulate[1..n]:ATTenuation? 334
- :CALCulate[1..n]:CLValue? 336
- :CALCulate[1..n]:EVENt? 338
- :CALCulate[1..n]:EVENt:COUNt? 341
- :CALCulate[1..n]:HFACtor 343
- :CALCulate[1..n]:HFACtor? 345
- OTDR 333 347
- :CALCulate[1..n]:IORefraction 348
- 336 OTDR 350
- OTDR 337 351
- :CALCulate[1..n]:LOSS? 352
- :CALCulate[1..n]:ORL? 354
- :CALCulate[1..n]:REFLectance? 356
- :CALCulate[1..n]:RBScatter 359
- :CALCulate[1..n]:RBScatter? 361
- :CALCulate[1..n]:SLOSs? 363
- 352 OTDR 366
- ³ Label: 367
- ³ End-of-Fiber: 367
- 354 OTDR 368
- :CALCulate[1..n]:THReshold: 369
- REFLectance 369
- REFLectance? 371
- OTDR 359 373
- 360 OTDR 374
- ³ Splice Loss: 374
- OTDR 361 375
- :CALCulate[1..n]:TORL? 376
- :CONFigure[1..n]:ACQuisition 378
- :CONFigure[1..n]:ACQuisition: 380
- DURation 380
- DURation? 381
- HRESolution 383
- HRESolution? 384
- OTDR 371 385
- 372 OTDR 386
- OTDR 373 387
- 374 OTDR 388
- ³ Wavelength: 389
- ³ Range: 389
- 376 OTDR 390
- OTDR 377 391
- LIMit:HIGH? 392
- LIMit:LOW? 393
- 380 OTDR 394
- WAVelength? 395
- WAVelength:LIST? 396
- OTDR 383 397
- 384 OTDR 398
- :CONFigure[1..n]:ANAlysis: 399
- IORefraction 399
- IORefraction? 400
- OTDR 387 401
- RBScatter? 402
- OTDR 389 403
- EOFiber? 404
- OTDR 393 407
- 394 OTDR 408
- :ERRor[1..n]? 409
- OTDR 397 411
- :FETCh[1..n]:ASETting:PULSe? 412
- :FETCh[1..n]:ASETting:RANGe? 413
- :FETCh[1..n]:CFConnector? 414
- :FETCh[1..n]:DURation? 415
- :FETCh[1..n]:HRESolution? 416
- :FETCh[1..n]:LFIBer? 417
- :FETCh[1..n]:PULSe? 418
- :FETCh[1..n]:RANGe? 419
- :FETCh[1..n]:STEP? 420
- OTDR 407 421
- 408 OTDR 422
- :FETCh[1..n]:WAVelength? 423
- :INITiate[1..n][:IMMediate] 424
- :INITiate[1..n]:STATe? 425
- :MMEMory[1..n]:DATA:TYPE? 426
- :MMEMory[1..n]:LOAD:NAME? 427
- :MMEMory[1..n]:LOAD:TRACe 428
- :MMEMory[1..n]:STORe:TRACe 429
- :MMEMory[1..n]:STORe:TRACe: 430
- OVERwrite 430
- OVERwrite? 432
- :SOURce[1..n]:FREQuency:BURSt 433
- OTDR 421 435
- 422 OTDR 436
- OTDR 423 437
- 424 OTDR 438
- :SOURce[1..n]:FREQuency:PRF 439
- :SOURce[1..n]:FREQuency:PRF? 441
- OTDR 429 443
- 430 OTDR 444
- :SOURce[1..n]:POWer:STATe 445
- :SOURce[1..n]:POWer:STATe? 446
- OTDR 433 447
- 434 OTDR 448
- FREQuency 449
- FREQuency? 451
- OTDR 439 453
- 440 OTDR 454
- OTDR 441 455
- 442 OTDR 456
- OTDR 443 457
- 444 OTDR 458
- OTDR 445 459
- 446 OTDR 460
- :SOURce[1..n]:WAVelength 461
- :SOURce[1..n]:WAVelength? 462
- 450 OTDR 464
- :TRACe[1..n][:DATA]? 465
- :TRACe[1..n]:CATalog? 467
- :TRACe[1..n]:POINts? 468
- OTDR 457 471
- OTDR 459 473
- OTDR 461 475
- OTDR 463 477
- OTDR 465 479
- ₼⦌␂ℝ☀⹂䓸德棟Ⓟ䤓屓⸩ 480
- MARKING REQUIREMENTS 481
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