Exfo FTB -5240S/5240BP Optical Spectrum Analyzer Manual do Utilizador Página 21
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Preparing Your OSA for a Test
OSA 15
Nulling Electrical Offsets
Nulling Electrical Offsets
The offset nulling process provides a zero-power reference measurement,
thus eliminating the effects of electronic offsets and dark current due to
detectors.
Temperature and humidity variations affect the performance of electronic
circuits and optical detectors. For this reason, EXFO recommends
performing a nulling of the electrical offsets whenever environmental
conditions change.
Nulling can be performed for all tests modes. In addition, a nulling is
performed automatically each time you start the OSA application, and at
regular intervals afterwards.
Note: You cannot perform an offset nulling in the offline version of the
application.
To perform an offset nulling:
1. From the main window, select the Acquisition tab.
- FTB-5240S/S-P/BP 1
- Contents 3
- Certification Information 6
- 1 Introducing the 7
- FTB-5240S/S-P/BP Optical 7
- Spectrum Analyzer 7
- Typical Applications 9
- Optional Software Packages 10
- Post-Processing Application 11
- 2 Safety Information 13
- 8 FTB-5240S/S-P/BP 14
- 10 FTB-5240S/S-P/BP 16
- Selecting a Test Mode 18
- 14 FTB-5240S/S-P/BP 20
- WDM ST EDFA 20
- Nulling Electrical Offsets 21
- 16 FTB-5240S/S-P/BP 22
- Preparing Your OSA for a Test 24
- Factors 28
- To save a user calibration: 32
- Using the Autonaming Feature 35
- To customize the file name: 36
- 32 FTB-5240S/S-P/BP 38
- WDM Mode 39
- 34 FTB-5240S/S-P/BP 40
- 36 FTB-5240S/S-P/BP 42
- 44 FTB-5240S/S-P/BP 50
- 46 FTB-5240S/S-P/BP 52
- 48 FTB-5240S/S-P/BP 54
- Customizing WDM Results Table 55
- 52 FTB-5240S/S-P/BP 58
- 56 FTB-5240S/S-P/BP 62
- 58 FTB-5240S/S-P/BP 64
- 60 FTB-5240S/S-P/BP 66
- Defining Global Thresholds 68
- To define global thresholds: 70
- Defining Default Thresholds 72
- To define default Thresholds: 74
- 74 FTB-5240S/S-P/BP 80
- 4. Press Edit Selection 82
- 80 FTB-5240S/S-P/BP 86
- 84 FTB-5240S/S-P/BP 90
- 86 FTB-5240S/S-P/BP 92
- 88 FTB-5240S/S-P/BP 94
- Drift Mode 97
- 92 FTB-5240S/S-P/BP 98
- 94 FTB-5240S/S-P/BP 100
- Defining Preferences 100
- IMPORTANT 102
- To enter comments: 103
- 98 FTB-5240S/S-P/BP 104
- Defining Display Parameters 105
- 2. Select the Display tab 106
- 102 FTB-5240S/S-P/BP 108
- 104 FTB-5240S/S-P/BP 110
- 106 FTB-5240S/S-P/BP 112
- 108 FTB-5240S/S-P/BP 114
- 2. Select the General tab 116
- 112 FTB-5240S/S-P/BP 118
- 114 FTB-5240S/S-P/BP 120
- 116 FTB-5240S/S-P/BP 122
- 118 FTB-5240S/S-P/BP 124
- Threshold Limit Definition 125
- 120 FTB-5240S/S-P/BP 126
- 122 FTB-5240S/S-P/BP 128
- Managing Channels 129
- 2. Select the Channels tab 130
- 130 FTB-5240S/S-P/BP 136
- 132 FTB-5240S/S-P/BP 138
- 136 FTB-5240S/S-P/BP 142
- 140 FTB-5240S/S-P/BP 146
- Criteria Test 146
- Compatibility 146
- 142 FTB-5240S/S-P/BP 148
- 6. Click Next 149
- 144 FTB-5240S/S-P/BP 150
- 146 FTB-5240S/S-P/BP 152
- DFB Mode 155
- 152 FTB-5240S/S-P/BP 158
- 158 FTB-5240S/S-P/BP 164
- 160 FTB-5240S/S-P/BP 166
- 166 FTB-5240S/S-P/BP 172
- 172 FTB-5240S/S-P/BP 178
- 174 FTB-5240S/S-P/BP 180
- Spectral Transmittance Mode 183
- 180 FTB-5240S/S-P/BP 186
- 186 FTB-5240S/S-P/BP 192
- Parameters 193
- 188 FTB-5240S/S-P/BP 194
- Defining ST Analysis Settings 196
- 192 FTB-5240S/S-P/BP 198
- 194 FTB-5240S/S-P/BP 200
- 196 FTB-5240S/S-P/BP 202
- EDFA Mode 205
- 200 FTB-5240S/S-P/BP 206
- 202 FTB-5240S/S-P/BP 208
- 206 FTB-5240S/S-P/BP 212
- 210 FTB-5240S/S-P/BP 216
- 212 FTB-5240S/S-P/BP 218
- 216 FTB-5240S/S-P/BP 222
- 220 FTB-5240S/S-P/BP 226
- value applied on the output 229
- 228 FTB-5240S/S-P/BP 234
- 230 FTB-5240S/S-P/BP 236
- 232 FTB-5240S/S-P/BP 238
- 234 FTB-5240S/S-P/BP 240
- 10 Starting a Measurement 243
- 11 Managing Files and Test 245
- Configurations 245
- Using the Discover Feature 247
- Managing Measurement Files 248
- 244 FTB-5240S/S-P/BP 250
- 246 FTB-5240S/S-P/BP 252
- 248 FTB-5240S/S-P/BP 254
- Raw trace data 254
- Trace information 254
- Trace identification 254
- Managing Favorites 256
- 2. Select the Favorites tab 257
- 252 FTB-5240S/S-P/BP 258
- To save a test configuration: 259
- 254 FTB-5240S/S-P/BP 260
- 258 FTB-5240S/S-P/BP 264
- Using a Restore Point 266
- 12 Managing Results 267
- Managing WDM Test Results 268
- 264 FTB-5240S/S-P/BP 270
- 266 FTB-5240S/S-P/BP 272
- Results Tab 273
- Channel Results Tab 274
- Global Results Tab 276
- WDM Investigator Tab 277
- 272 FTB-5240S/S-P/BP 278
- Symbol Meaning 279
- 274 FTB-5240S/S-P/BP 280
- Managing Drift Test Results 282
- Signal power 283
- Managing Results 284
- Channel Graph Tab 286
- Channel History Tab 287
- WDM Graph Tab 289
- 284 FTB-5240S/S-P/BP 290
- Managing DFB Test Results 293
- 288 FTB-5240S/S-P/BP 294
- Managing FP Test Results 297
- 292 FTB-5240S/S-P/BP 298
- ST Graph Tab 301
- 296 FTB-5240S/S-P/BP 302
- ST Results Tab 304
- Managing EDFA Test Results 306
- Swapping EDFA Traces 311
- Adjusting the Display Size 312
- 308 FTB-5240S/S-P/BP 314
- Using Zoom Controls 315
- 310 FTB-5240S/S-P/BP 316
- Managing Markers 317
- 314 FTB-5240S/S-P/BP 320
- Managing Trace Information 321
- 316 FTB-5240S/S-P/BP 322
- 318 FTB-5240S/S-P/BP 324
- Generating Reports 325
- 13 Maintenance 327
- 322 FTB-5240S/S-P/BP 328
- Cleaning EUI Connectors 328
- Recalibrating the Unit 330
- Recycling and Disposal 331
- 14 Troubleshooting 333
- 328 FTB-5240S/S-P/BP 334
- Troubleshooting 335
- From the Main Menu, press 335
- 15 Warranty 339
- Liability 340
- Service and Repairs 342
- A Technical Specifications 345
- Technical Specifications 346
- B SCPI Command Reference 347
- SCPI Command Reference 348
- :CALCulate[1..n][:WDM]: 356
- BANDwidth[1 356
- RelativeLEVel 356
- RelativeLEVel? 358
- 354 FTB-5240S/S-P/BP 360
- CENTer:ITUGrid 362
- CENTer:ITUGrid? 364
- NOISe:AUTO 365
- NOISe:AUTO? 367
- NOISe:DISTance:FREQuency 368
- NOISe:DISTance:FREQuency? 370
- NOISe:DISTance:[WAVelength] 372
- NOISe:DISTance[WAVelength]? 374
- NOISe:WIDTh:FREQuency 376
- NOISe:WIDTh:FREQuency? 378
- NOISe:WIDTh:[WAVelength] 380
- NOISe:WIDTh[WAVelength]? 383
- NOISe:TYPE 385
- NOISe:TYPE? 387
- SIGnalPower:TYPE 389
- SIGnalPower:TYPE? 391
- WIDTh:FREQuency 393
- WIDTh:FREQuency? 395
- WIDTh[:WAVelength] 397
- WIDTh[:WAVelength]? 399
- CATalog? 401
- [:DEFine] 404
- [:DEFine]? 407
- DELete[:NAME] 409
- DELete:ALL 410
- CENTer:FREQuency 411
- CENTer:FREQuency? 413
- CENTer[:WAVelength] 415
- CENTer[:WAVelength]? 417
- NOISe:DISTance[:WAVelength] 435
- NOISe:DISTance[:WAVelength]? 437
- NOISe:WIDTh[:WAVelength] 443
- NOISe:WIDTh[:WAVelength]? 446
- 446 FTB-5240S/S-P/BP 452
- NSELect? 454
- 450 FTB-5240S/S-P/BP 456
- FREQuency? 461
- BANDwidth[1 465
- [:WAVelength]? 465
- 464 FTB-5240S/S-P/BP 470
- CenterMASs:FREQuency? 475
- CenterMASs[:WAVelength]? 477
- CenterPEAk:FREQuency? 479
- CenterPEAk[:WAVelength]? 481
- 478 FTB-5240S/S-P/BP 484
- 480 FTB-5240S/S-P/BP 486
- 486 FTB-5240S/S-P/BP 492
- 488 FTB-5240S/S-P/BP 494
- 490 FTB-5240S/S-P/BP 496
- 492 FTB-5240S/S-P/BP 498
- SIGnalPower? 499
- FLATness? 504
- :CALCulate[1..n][:WDM]:DATA: 506
- SIGnalPower:FLATness? 506
- SIGnalPower:MEAN? 507
- 502 FTB-5240S/S-P/BP 508
- :CALCulate[1..n][:WDM]:OSNR: 509
- BANDwidth 509
- :CALCulate[1..n][:WDM]:STATe 516
- :CALCulate[1..n][:WDM]:STATe? 517
- 512 FTB-5240S/S-P/BP 518
- 514 FTB-5240S/S-P/BP 520
- :CALibration[1..n]:DATE? 522
- 518 FTB-5240S/S-P/BP 524
- 520 FTB-5240S/S-P/BP 526
- :INITiate:CONTinuous 528
- :INITiate:CONTinuous? 531
- :INITiate[:IMMediate] 532
- :MEMory:TABLe:DATA? 534
- :MEMory:TABLe:DEFine 536
- :MEMory:TABLe:DEFine? 538
- :MEMory:TABLe:SELect 539
- :MEMory:TABLe:SELect? 540
- :MEMory:TABLe:POINt? 541
- 536 FTB-5240S/S-P/BP 542
- :SENSe[1..n]:AVERage:COUNt 544
- :SENSe[1..n]:AVERage:COUNt? 546
- :SENSe[1..n]:AVERage:STATe 548
- :SENSe[1..n]:AVERage:STATe? 549
- :SENSe[1..n]:AVERage:TYPE 550
- :SENSe[1..n]:AVERage:TYPE? 552
- [:MAGNitude] 553
- [:MAGNitude]? 555
- :SENSe[1..n]:FREQuency:STARt 557
- :SENSe[1..n]:FREQuency:STARt? 559
- :SENSe[1..n]:FREQuency:STOP 561
- :SENSe[1..n]:FREQuency:STOP? 563
- 560 FTB-5240S/S-P/BP 566
- 562 FTB-5240S/S-P/BP 568
- 564 FTB-5240S/S-P/BP 570
- 566 FTB-5240S/S-P/BP 572
- 568 FTB-5240S/S-P/BP 574
- 570 FTB-5240S/S-P/BP 576
- :SNUMber? 577
- :STATus? 578
- CONDition? 579
- 576 FTB-5240S/S-P/BP 582
- 578 FTB-5240S/S-P/BP 584
- 580 FTB-5240S/S-P/BP 586
- 582 FTB-5240S/S-P/BP 588
- :TRACe:FEED:CONTrol 589
- :TRACe:FEED:CONTrol? 591
- :TRACe:POINts? 593
- 590 FTB-5240S/S-P/BP 596
- :UNIT[1..n]:POWer 597
- :UNIT[1..n]:POWer? 599
- :UNIT[1..n]:RATio 600
- :UNIT[1..n]:RATio? 601
- :UNIT[1..n]:SPECtrum 602
- :UNIT[1..n]:SPECtrum? 603
- Referencing 604
- Command Sequence Comments 605
- 600 FTB-5240S/S-P/BP 606
- Noise Analysis 607
- 602 FTB-5240S/S-P/BP 608
- Acquisition Sequence (WDM) 609
- Channel (WDM) 610
- 606 FTB-5240S/S-P/BP 612
- 608 FTB-5240S/S-P/BP 614
- 610 FTB-5240S/S-P/BP 616
- 612 FTB-5240S/S-P/BP 618
- 614 FTB-5240S/S-P/BP 620
- 616 FTB-5240S/S-P/BP 622
- C Formulas Used with Your 625
- Optical Spectrum Analyzer 625
- Transmittance) 626
- ₼⦌␂ℝ☀⹂䓸德棟Ⓟ䤓屓⸩ 636
- MARKING REQUIREMENTS 637
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