Agilent Technologies E1445A Manual do Utilizador Página 129
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Sweeping Using
Start and Span
Frequencies
The SMPLSWP2 program specifies a start frequency and a frequency span
to continuously sweep from 1 kHz to 21 kHz. The program also queries the
start frequency, stop frequency, center frequency, and frequency span to
show the relationship between them.
Using the flowchart in Figure 4-1 as a guide, the steps of this program are:
1. Set the frequency sweep mode
[SOURce:]FREQuency[1]:MODE <mode>
2. Set the start frequency
[SOURce:]FREQuency[1]:STARt <start_freq>
3. Set the frequency span
[SOURce:]FREQuency[1]:SPAN <freq_span>
4. Set the number of sweeps
[SOURce:]SWEep:COUNt <number>
5. Set the output function
[SOURce:]FUNCtion[:SHAPe] <shape>
6. Set the signal amplitude
[SOURce:]VOLTage[:LEVel][:IMMediate][:AMPLitude] <amplitude>
7. Place the AFG in the wait-for-arm state
INITiate[:IMMediate]
Chapter 4 Sweeping and Frequency-Shift Keying 127
- *E1445-90005* 1
- Contents 3
- WARNINGS 16
- Printing History 16
- Safety Symbols 16
- Declaration of Conformity 17
- Getting Started 21
- VXIbus Factory 22
- Settings 22
- The AFG Logical 23
- Addressing the AFG 24
- (External Controller 24
- Setting the AFG 25
- Servant Area 25
- The AFG Bus 26
- Request Level 26
- AFG Installation in 27
- Instrument Language (SCPI) 28
- Executing Coupled 30
- Commands 30
- Program Languages 31
- Turning Off 33
- (Suppressing) the 33
- End-Of-Line Terminator 33
- Visual BASIC 34
- Language 34
- Programs Using 34
- Agilent SICL 34
- Visual C/C++ 42
- Introductory Programs 48
- Resetting and 49
- Clearing the AFG 49
- Querying the 50
- Power-On/Reset 50
- Configuration 50
- Generating 53
- Sine Waves 53
- Generating Standard Waveforms 55
- Standard Waveforms Flowchart 56
- Generating Sine Waves 60
- Generating Square Waves 63
- Selecting the Output Loads 71
- Using Phase Modulation 77
- Sinusoid Function 80
- Requirements 80
- Output Units 82
- Selecting the 82
- Deviation Units for 82
- Phase Modulation 82
- Using MINimum 83
- Chapter 3 85
- Arbitrary Waveforms Flowchart 86
- Visual BASIC and 100
- Visual C/C++ Program 100
- Versions 100
- [SOURce:]LIST[1]:DELete:ALL 101
- Continued on Next Page 104
- Sample Programs 106
- Generating a 109
- Damped Sine Wave 109
- Rectified Sine Wave 113
- Using DAC Codes 116
- Sending Segment 116
- Sequences 116
- Reference 117
- Oscillator Sources 117
- Sample Sources 117
- Chapter 4 119
- Chapter Contents 119
- FSK Programming Flowchart 120
- FSK Command Reference 122
- Sweeping and Frequency Lists 122
- Sweeping Using 123
- Start and Stop 123
- Frequencies 123
- Specifying a 126
- Frequency List 126
- Start and Span 129
- Frequency Lists 132
- Using Definite and 132
- Indefinite Length 132
- Arbitrary Blocks 132
- Sweep Points 137
- Versus Time 137
- Frequency-Shift Keying 149
- Sweep Count and 158
- Repetition Count 158
- 1 160
- Output Frequency 162
- FSK Control 163
- Arming and Triggering 165
- The ARM-TRIG Configuration 166
- Initiating Waveforms 167
- Arming the AFG 167
- Setting Arming 168
- Setting the Arm 171
- Cycle Count 171
- Triggering the AFG 174
- Figure 5-3 175
- Lock-Stepping 178
- Multiple AFGs 178
- Gating Trigger 185
- Frequency Sweeps 188
- Using Triggers 188
- Arming and 192
- Triggering a 192
- Frequency Sweep 192
- Aborting Waveforms 198
- AFG Frequency 199
- Synthesis Modes 199
- Frequency Sweep/ 203
- List Arming 203
- List Advance Trigger 203
- Chapter 6 205
- Marker Pulse Enable Flowchart 206
- Available Marker Sources 207
- Generating Marker 208
- Pulses for Arbitrary 208
- Waveforms 208
- Generating Multiple 209
- Marker Pulses in 209
- Multiple Segment 209
- Generating Single 214
- Single Waveform 214
- Segments 214
- Marker Program Comments 224
- High Speed Operation 225
- Using the Signed 227
- Number Format 227
- Using the Unsigned 231
- Definite Length 233
- Block Data Format 233
- Using Combined Signed Data 241
- Using the Combined 242
- List with the Signed 242
- Using Combined Unsigned Data 247
- Combined Segment 252
- Sequence List 252
- Using the VXIbus Backplane 261
- Downloading Data 271
- Directly into the 271
- “Digital Port In” 280
- Connector Pinout 280
- ≥ to the maximum DAC 282
- Command Reference 283
- Command Types 286
- SCPI Command Format 286
- SCPI Command Parameters 288
- Optional 289
- Parameters 289
- Querying 289
- Parameter 289
- SCPI Command Execution 290
- SCPI Command Reference 291
- Example Aborting a Waveform 292
- [:STARt][:LAYer[1]]:COUNt 293
- [:STARt]:LAYer2:COUNt 294
- [:STARt]:LAYer2[:IMMediate] 295
- [:STARt]:LAYer2:SLOPe 295
- [:STARt]:LAYer2:SOURce 296
- :SWEep:COUNt 297
- :SWEep[:IMMediate] 297
- :SWEep:LINK 298
- :SWEep:SOURce 299
- CALibration 300
- :DATA:AC[1] 301
- :DATA:AC2 301
- :DATA[:DC] 302
- [:DC]:BEGin 302
- [:DC]:POINt? 303
- :SECure:CODE 304
- :SECure[:STATe] 305
- :STATe:AC 306
- :STATe:DC 307
- INITiate 308
- OUTPut[1] 310
- :FILTer[:LPASs][:STATe] 311
- :IMPedance 311
- :LOAD:AUTO 313
- [:STATe] 313
- [SOURce:] 314
- [SOURce:]ARBitrary 315
- :DAC:SOURce 317
- :DOWNload 318
- :DOWNload:COMPlete 320
- [SOURce:]FREQuency[1] 321
- [:CW 324
- :FSKey:SOURce 326
- [SOURce:]FREQuency2 332
- [:CW 333
- [SOURce:]FUNCtion 334
- [SOURce:]LIST[1] 336
- :FORMat[:DATA] 337
- [:SEGMent]:ADDRess? 338
- [:SEGMent]:CATalog? 338
- [:SEGMent]:COMBined 339
- [:SEGMent]:COMBined:POINts? 340
- [:SEGMent]:DEFine 341
- [:SEGMent]:DELete:ALL 342
- [:SEGMent]:DELete[:SELected] 342
- [:SEGMent]:FREE? 343
- [:SEGMent]:MARKer 344
- [:SEGMent]:MARKer:POINts? 345
- [:SEGMent]:MARKer:SPOint 345
- [:SEGMent]:SELect 346
- [:SEGMent]:VOLTage 347
- [:SEGMent]:VOLTage:DAC 348
- [:SEGMent]:VOLTage:POINts? 349
- :SSEQuence:ADDRess? 349
- :SSEQuence:CATalog? 350
- :SSEQuence:COMBined 350
- :SSEQuence:COMBined:POINts? 351
- :SSEQuence:DEFine 352
- :SSEQuence:DELete:ALL 353
- :SSEQuence:DELete[:SELected] 353
- :SSEQuence:DWELl:COUNt 354
- :SSEQuence:FREE? 355
- :SSEQuence:MARKer 356
- :SSEQuence:MARKer:POINts? 357
- :SSEQuence:MARKer:SPOint 357
- :SSEQuence:SELect 358
- :SSEQuence:SEQuence 359
- :SSEQuence:SEQuence:SEGMents? 359
- [SOURce:]LIST2 360
- :FREQuency 361
- :FREQuency:POINts? 362
- [SOURce:]MARKer 363
- :ECLTrg<n>[:STATe] 364
- :POLarity 366
- [SOURce:]PM 367
- :UNIT[:ANGLe] 369
- [SOURce:]RAMP 370
- [SOURce:]ROSCillator 372
- [SOURce:]SWEep 374
- :DIRection 375
- :SPACing 377
- [SOURce:]VOLTage 379
- [:LEVel][:IMMediate]:OFFSet 382
- CALibration[:DC]:BEGin 383
- :OPC:INITiate 384
- :OPERation:CONDition? 385
- :OPERation:ENABle 385
- :OPERation[:EVENt]? 386
- :OPERation:NTRansition 386
- :OPERation:PTRansition 387
- :QUEStionable:CONDition? 388
- :QUEStionable:ENABle 388
- :QUEStionable[:EVENt]? 389
- :QUEStionable:NTRansition 389
- :QUEStionable:PTRansition 390
- Subsystem Syntax SYSTem 391
- :VERSion? 392
- Subsystem Syntax TRIGger 393
- [:STARt]:COUNt 394
- [:STARt]:GATE:POLarity 395
- [:STARt]:GATE:SOURce 395
- [:STARt]:GATE:STATe 396
- [:STARt][:IMMediate] 397
- [:STARt]:SLOPe 397
- [:STARt]:SOURce 398
- :STOP[:IMMediate] 399
- :STOP:SLOPe 400
- :STOP:SOURce 400
- :SWEep:TIMer 404
- VINStrument 405
- [:CONFigure]:LBUS[:MODE]:AUTO 406
- [:CONFigure]:TEST:CONFigure 407
- [:CONFigure]:TEST:DATA? 408
- [:CONFigure]:VME[:MODE] 408
- :IDENtity? 410
- SCPI Command Quick Reference 411
- SCPI Conformance Information 416
- IEEE-488.2 Common Commands 418
- *EMC and *EMC? 419
- *ESE and *ESE? 419
- *PUD and *PUD? 424
- *SRE and *SRE? 427
- AFG Status 431
- 430 AFG Status Chapter 9 432
- The Questionable 433
- Signal Status Group 433
- 432 AFG Status Chapter 9 434
- The Operation 437
- Status Group 437
- 436 AFG Status Chapter 9 438
- The Standard Event 441
- Status Enable Register 442
- 440 AFG Status Chapter 9 442
- Comments 443
- Chapter 9 AFG Status 441 443
- The Status Byte 444
- *SRE <unmask> 445
- <unmask> value of 0 445
- STATus:PRESet 445
- 444 AFG Status Chapter 9 446
- Block Diagram Description 447
- Oscillator 450
- Frequency 450
- Generators 450
- Generating Sinusoid Waveforms 452
- Output Circuitry Description 453
- AFG Memory Description 454
- Agilent E1445A Specifications 455
- Frequency and 456
- Sample Rate 456
- Characteristics 456
- Frequency Generator #2: 457
- Amplitude 459
- Sine Wave Spectral Purity 460
- Interface 461
- General VXIbus 463
- Useful Tables 465
- Example Program Listing 466
- Command Coupling Groups 469
- Frequency Limits 472
- Amplitude Limits 473
- Power-On/Reset Configuration 474
- Output impedance 475
- Error Messages 477
- Register-Based Programming 485
- Accessing the Registers 486
- Reading the AFG’s 487
- Offset Register 487
- Reading the Offset Register 488
- Changing the Output Frequency 489
- Frequency Control 491
- Programs 491
- SOUR:FREQ1:RANG command in 493
- RAMP:POINts value 493
- Divide-by-N Frequency 494
- Changing the Signal Phase 497
- Phase Control 498
- The Waveform 500
- Sequence Registers 500
- Sequence Selection 502
- 470 SUBEND 503
- The High Speed Data 508
- Register 508
- • High-Speed Data Register: 508
- Agilent E1445A User’s Manual 511
- A (continued) 512
- B (continued) 513
- C (continued) 514
- D (continued) 516
- E (continued) 518
- F (continued) 519
- G (continued) 520
- M (continued) 522
- Q (continued) 524
- R (continued) 525
- S (continued) 526
- T (continued) 531
- V (continued) 532
- W (continued) 533
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