Agilent Technologies N8201A Service Manual Page 240
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240 Agilent N8201A Performance Downconverter Synthetic Instrument Module, 250 kHz to 26.5 GHz
14 Measure (Spectrum Analysis Mode)
Pressing Meas Setup after Channel Power has been selected will access the channel
power measurement setup menu. Pressing Radio Standard after Mode Setup has been
selected will access all the Radio Standards available for which this measurement can be
applied. Pressing Meas Control after Channel Power has been selected will access the
channel power measurement control menu which allows you to pause or restart your
measurement, or toggle between continuous and single measurement.
When a DVB-T radio standard is selected, this measurement will also compare the input
signal against a predefined spectrum mask. The mask amplitudes defined in the DVB-T
specification (ETSI EN 300 744 V1.4.1) range from 0 dB to 100 dB. This is for power
measured in a 4 kHz bandwidth therefore an adjustment to these values will need to be
made as the measurement is made in a 7.61MHz bandwidth.
The measurement makes two sweeps, one in a 4 kHz bandwidth and one in a 7.61 MHz
bandwidth, then computes the difference between the two. This value will be used to adjust
the mask settings. As this value is calculated as part of the measurement setup, it is
expected that the DVB-T signal to be measured will be present prior to the standard being
selected. The mask will be positioned relative to the power measured in the 7.61 MHz
bandwidth. The pass/fail indicator will be used to determine if the input signal exceeds the
mask or not.
If the current span setting is narrower than the mask width, the mask will not be displayed
and the message 10191 displayed in error queue. Increase the span to at least the mask
width to display the mask. When the mask is not displayed, the pass/fail functionality will
not be executed therefore no pass/fail flag will be displayed.
To ensure accuracy this measurement requires a specific minimum Sweep Point to Span
ratio. This is calculated using; Sweep Points = Span / (Closest Mask Breakpoint / 2), then
round it off.
For DVB-T measurements using 24 MHz Span, the number of Sweep Points is 2001. If the
Sweep Point to Span ratio is changed to a value less than the value obtained using the
above algorithm, the message 10192 is then displayed, although the measurement is still
made using the new sweep point to span ratio.
Key Path: MEASURE
NOTE
The displayed trace is the current trace, not the averaged trace.
- User’s and 1
- SCPI Programming Guide 1
- Adobe Acrobat Reader 2
- Contents 5
- 3 Auto Couple 6
- 6Display 7
- 8Frequency / Channel 9
- 10 Marker -> 10
- 11 Marker 10
- 12 Marker Fctn 11
- 13 Meas Control 11
- 15 Measurement Setup 12
- 16 MODE 17
- 18 Peak Search 18
- 25 Trace/View 21
- 26 Trig 22
- 27 Using the STATus System 22
- 28 Programming Fundamentals 23
- List of Commands 25
- " on page 62 29
- on page 180 39
- Using This Document 43
- Terms Used in This Book 44
- Amplitude / Y Scale 45
- 2 Amplitude / Y Scale 48
- Scale/Div 49
- Scale Type 50
- Presel Center 51
- Presel Adjust 53
- 3 - 26 GHz 55
- External 55
- Y Axis Units 56
- Amplitude / Y Scale 2 57
- Ref Lvl Offset 62
- Factory Preset: No 65
- “Edit" on page 66 67
- Delete All Corrections 69
- Ext Amp Gain 70
- Atten Step 71
- Auto Couple 73
- Auto All 74
- FFT & Sweep 76
- Auto: Best Speed 77
- Manual: Swept 77
- Manual: FFT 78
- FFTs/Span 79
- PhNoise Opt 81
- Optimize LO for Fast Tuning 82
- Detector 84
- ADC Dither 86
- ADC Ranging 88
- Auto Ranging 89
- 4 BW/Avg 92
- BAND:VID? 95
- BWID:VID:AUTO ON 95
- BWID:VID:AUTO? 95
- VBW/RBW 96
- Remote Commands: 98
- Avg/VBW Type 100
- Log-Pwr Avg (Video) 101
- Pwr Avg (RMS) 101
- Voltage Avg 102
- Example: 103
- Remote Command: 103
- Span/RBW 104
- Det/Demod 105
- Detector Auto Manual 106
- Tip: RMS Detection 107
- 5 Det/Demod 108
- Remote Command Notes: 108
- Det/Demod 5 109
- Negative Peak 115
- Quasi Peak 116
- EMI Average 118
- EMI Peak 119
- MIL Peak 120
- RMS (Remote Command Only) 122
- Agilent Technologies 123
- Full Screen 124
- Display Line 125
- 6 Display 126
- Limit 1 or Limit 2 127
- Type (Upper Lower) 127
- Limit Display 128
- Limit Test 128
- Margin (On Off) 129
- Frequency (or Time) 131
- Amplitude 131
- Delete Limit 132
- Freq Interp 133
- Amptd Interp 134
- X Axis Units 135
- Limits (Fixed Rel) 135
- Delete All Limits 136
- Active Fctn Position 138
- Change Title 141
- Clear Title 141
- Preferences 142
- File Types 144
- Catalog 146
- Corrections 148
- By Date 148
- By Name 148
- Dir Select 149
- Save Now 150
- Trace + State 153
- Reverse Bitmap 154
- Trace 1 154
- Trace 2 154
- Load Now 156
- Destination 158
- Delete Now 160
- Copy Now 162
- Dir From/To 163
- Rename Now 164
- Key Path: File, Rename 165
- Create Dir 167
- Delete All 169
- Frequency / Channel 175
- Center Freq 176
- Start Freq 177
- Stop Freq 178
- Freq Offset 180
- Signal Track 181
- 8 Frequency / Channel 182
- Input/Output 183
- Input Port 184
- RF Coupling 185
- Input Mixer (Option AYZ only) 186
- 18-26.5 GHz (K) 187
- 26.5-40 GHz (A) 187
- 33-50 GHz (Q) 187
- 40-60 GHz (U) 188
- 50-75 GHz (V) 188
- 60-90 GHz (E) 188
- 75-110 GHz (W) 188
- 90-140 GHz (F) 189
- 110-170 GHz (D) 189
- 140-220 GHz (G) 189
- 170-260 GHz (Y) 189
- 220-325 GHz (J) 190
- Signal ID (Option AYZ only) 191
- Signal ID Mode 192
- Mixer Config 193
- 9 Input/Output 194
- Mixer Type 194
- Mixer Bias 194
- Range: –10 to 10 mA 195
- 321.4 MHz IF Out Opt 196
- Marker -> 199
- Mkr->CF 200
- Mkr->Stop 201
- MkrΔ->Span 201
- MkrΔ->CF 201
- Mkr->Ref Lvl 202
- Marker Units 203
- Select Marker 206
- Delta Pair 207
- Span Pair 209
- Marker Trace 212
- Readout 213
- Inverse Time 214
- Marker Table 216
- Marker All Off 217
- Marker Fctn 219
- Marker Noise 221
- Band/Intvl Power 223
- Function Off 224
- Marker Count 225
- Gate Time 226
- Meas Control 227
- Restart 228
- Pause or Resume 230
- (Spectrum Analysis Mode) 233
- Meas Off 238
- Channel Power 239
- Key Path: MEASURE 240
- Occupied BW 242
- Adjacent Channel Power—ACP 244
- Multi-Carrier Power 248
- Power Stat CCDF 250
- Harmonic Distortion 253
- Burst Power 256
- Key Access: MEASURE 257
- Intermod (TOI) 259
- Spurious Emissions 260
- Spectrum Emission Mask 261
- Measurement Setup 269
- Avg Number 271
- Avg Mode 272
- Integ BW 273
- Chan Pwr Span 274
- Optimize Ref Level 275
- RRC Filter 276
- Filter Alpha 277
- Max Hold 281
- Occ BW % Pwr 282
- OBW Span 283
- Chan Integ BW 290
- Offset/Limits 291
- State Frequency Integ. BW 293
- Measurement Setup 15 295
- Meas Type 296
- On, On, Off, Off, Off, Off 299
- Total P wr R e f 301
- Noise Correction 306
- Carrier Setup 310
- Ref Carrier Freq 311
- Configure Carriers 312
- Carrier Pwr Present 313
- Carrier Width 314
- Carrier IntegBW 315
- Offsets/Limits 316
- Offset Integ BW 317
- Upper Offset Limit 317
- Lower Offset Limit 318
- Carrier Result 319
- Power Ref 322
- Function—CCDF) 327
- Meas BW 328
- Meas Interval 330
- Harmonics 335
- ST/Harmonic 336
- Range Table (On/Off) 337
- Range Table 338
- Video BW 341
- Sweep Time 342
- Auto Fill Range Table 343
- Meas Setup (Burst Power) 345
- Average Type 348
- Threshold Lvl 349
- Meas Method 350
- Burst Width 351
- Meas Setup (Intermod (TOI)) 353
- TOI Span 356
- Max Mixer Lvl 357
- Abs Start Limit 367
- Abs Stop Limit 367
- Peak Excursn 368
- Pk Threshold 369
- Attenuation 369
- Detector 1 370
- Detector 2 371
- Spur is enabled (no 376
- Factory Preset: Examine 377
- Range: Examine 377
- Example: SPUR:TYPE FULL 377
- Ref Level 379
- Fast Spurious Meas 380
- Key Path: Front-panel key 381
- Ref Channel 384
- Total Pwr Ref or PSD Ref 386
- SEM:CARR:AUTO 1 387
- SEM:CARR:AUTO? 387
- Factory Preset: A 389
- F is off, this will be 5 394
- Abs Stop 395
- Absolute 398
- Relative 398
- Factory Preset: 399
- Abs AND Rel 399
- Abs OR Rel 399
- Results Index 399
- Spectrum Analysis 407
- Radio Std 412
- J-STD-008 413
- GSM/EDGE 414
- 3GPP W-CDMA 414
- Key Type: 1 of N menu 415
- Bluetooth™ 417
- FCC Part 15 Subpart F 417
- 802.11a 418
- 802.11b 418
- Hiper LAN/2 419
- L/SECAM/NICAM 420
- G/PAL/NICAM 420
- I/PAL/NICAM 420
- System E 421
- UWB Indoor 421
- Example: RAD:STAN UWBINDOOR 422
- Radio Std Setup 423
- Retain Params 424
- Enable All Measurements 425
- Peak Search 429
- Next Peak 430
- Next Pk Right 431
- Next Pk Left 432
- Min Search 433
- Pk-Pk Search 434
- Continuous Pk 436
- Search Param 437
- 19 Preset 442
- User Preset 443
- Mode Preset 444
- Factory Preset 446
- Save User Preset 447
- 20 Restart 450
- 21 Single 452
- Span / X Scale 453
- 22 Span / X Scale 454
- Span Zoom 455
- Full Span 456
- Zero Span 457
- Last Span 458
- 23 Sweep 462
- Auto Sweep Time 464
- Gate Setup 467
- Polarity 468
- Gate Source 469
- Example: SWE:EGAT:SOUR RFB 471
- Show Errors 474
- Verbose SCPI On Off 475
- Clear Error Queue 476
- Power On/Preset 477
- Preset Type 478
- System 24 479
- Time/Date 481
- Set Time 482
- Set Date 483
- Alignments 484
- Align All Now 485
- Align Subsys 486
- Align IF 487
- Align ADC 487
- 24 System 488
- Align Current IF Flatness 488
- Align Current SysGain 488
- Align Audio Digitizer Gain 488
- Restore Align Defaults 489
- Config I/O 491
- Reference 492
- 10 MHz Out 493
- Show System 494
- Color Palette 495
- Vision Impair 1 495
- Vision Impair 2 495
- Optical Filter 496
- Monochrome 496
- Diagnostics 497
- Restore Sys Defaults 498
- License Key 499
- Activate License 500
- Delete License 500
- Show License 501
- Personality 502
- Security 503
- Managing Security 506
- Remote Message 508
- Remote Message Turned Off 509
- Trace/View 511
- Trace 1,2, or 3 514
- Clear Write 515
- Min Hold 517
- Operations 520
- 1 -> 3 521
- 2 -> 3 521
- Normalize 523
- Norm Ref Lvl 524
- Norm Ref Posn 525
- Ref Trace (Trace 3) 525
- Remote Command Example: 526
- Free Run 528
- Trigger In 531
- Ext Rear (Trigger In) 532
- RF Burst (Wideband) 533
- Trig Slope 534
- Trig Dela y 535
- Using the STATus System 537
- Status System Commands 538
- Using the Status Registers 541
- Using the STATus System 27 543
- Using a Status Register 544
- Generating a Service Request 545
- Status Byte Register 548
- Operation Status Register 553
- Questionable Status Register 554
- Calibration Query 555
- Clear Status 555
- Standard Event Status Enable 555
- Identification Query 556
- Instrument State Query 556
- Operation Complete 556
- Query Instrument Options 557
- Power-On Status Clear 557
- Service Request Enable 559
- Read Status Byte Query 559
- Trigger 559
- Self Test Query 560
- Wait-to-Continue 560
- STATus Subsystem 561
- Preset the Status Byte 562
- Questionable Register 563
- Questionable Power Register 576
- Range: 0 to 32767 579
- Programming Fundamentals 581
- SCPI Language Basics 582
- Parameters in Commands 584
- Variable Parameters 585
- Block Program Data 586
- Improving Measurement Speed 589
- Avoid unnecessary use of *RST 590
- Programming Fundamentals 28 591
- Command Subsystem 594
- Specific Command Differences 595
- Command Description 597
- Using Telnet to Send Commands 598
- Unix Telnet Example: 599
- Telnet Example: 600
- Troubleshooting help: 604
- Cannot connect to the N8201A 610
- If all else fails 612
- Normal Response for UNIX 612
- Error Messages 612
- Linking to VTL Libraries 617
- Example Program 618
- Opening a Session 619
- Device Sessions 620
- Addressing a Session 621
- Closing a Session 622
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