HP 8591C Manuel d'utilisateur Page 260
- Page / 550
- Table des matières
- MARQUE LIVRES
Noté. / 5. Basé sur avis des utilisateurs
I
-
I
-
N
dB
Bandwidth
Measurement
It is often necessary to measure a signal response’s bandwidth, such as when
testing a band-pass
lilter.
The signal to be measured must be centered on the
display with a span that includes the full response. Activate the measurement
by turning the N
dE!
PTS
ON
OFF key (ON). The spectrum analyzer places
arrow markers at the -3
dB
points on either side of the response and reads
the bandwidth. For other bandwidth responses enter the number of
dB
down
desired, from 1
dB
to 80
dB.
No other signal can appear on the display within N
dB
of the highest signal.
The measured signal cannot have more than one peak that is greater than or
equal to N
dB.
A signal must have a peak greater than the peak excursion to
be identified. The default value for the peak excursion is 6
dB.
The N
dB
bandwidth measurement error is typically:
l about
f2
% of the span, for spans < 10 MHz
l about
f3
% of the span, for spans > 10 MHz
2c
b’
MKR-TRK
1.0
kHL
REF
48
8
dBrn”
AS
10
dB
37
57
dmn”
User
PEAK
Menus
LOG
10
dB/
pKEE
ON
OFF
%
AM
ON
OFF
TOI
ON
m
WA
SB
SC
FC
Power
CORR
Me”U
FFT
Menu
Figure
5.32.
N dB Bandwidth Measurement
5-60
- User’s Guide 1
- Assistance 6
- Safety Notes 7
- General Safety Considerations 8
- Cable TV Analyzer 9
- Documentation Description 9
- Contents 12
- Preparing For Use 22
- More 2 of 4, and CAL TRK 25
- Inspection 26
- Requirements 28
- 81x-5182 33
- 3. Press 34
- cable shipped with the cable 37
- TV analyzer 37
- Printing 38
- Plotting 38
- Press @%FiQ, More 39
- Printing or Plotting 43
- Equipment 46
- Electrostatic 60
- Discharge 60
- Getting Started 62
- Front-Panel 64
- Features 64
- Rear-Panel 68
- Controls 71
- Fine-Focus Control 73
- Annotation 74
- PEAK SEARCH] or press 81
- Procedure to Change the 90
- Information 92
- Overwritten 105
- Press LOAD FILE 117
- (PRESET) 119
- Card -+ Trace AMP COR 124
- Limit-Line 125
- Functions 125
- FREQUENCY], 300 126
- Using limit-line Functions 128
- Selecting the Type of 132
- Limit-Line Table 132
- Selecting the Limit-Line 133
- Table Format 133
- Using Limit-Line Functions 137
- Selecting the Segment 138
- Limit4ine 140
- Functions 140
- FREQUENCY] 300 MHz 141
- I IHZ SWP 30.0 145
- FREQUENCY), START 145
- Amplitude-Correction 153
- 14:85:24 154
- AUG 18 154
- External 157
- Keyboard 157
- [BACKSPACE) 158
- External Keyboard 159
- Installation 160
- To Enter a Screen Title 160
- Making Basic 162
- Measurements Using 162
- Spectrum Analyzer Mode 162
- CFREQUENCY) 165
- FREQUENCY) 167
- 300 (MHz), then 167
- PEAK SEARCH_) 168
- Resolution Bandwidth 169
- FREQUENCY] 300 (MHz) 170
- SEARCH].) 170
- FREQUENCY], 300 (MHz) 172
- PEAK SEARCH) 174
- (MHz) 175
- FREQUENCY], 100 177
- FREQUENCY), START FREQ , 88 184
- AUTO COUPLE) and 185
- FREQUENCY), 400 192
- I I I I I I 194
- Third-Order 195
- Intermodulation 195
- Distortion 195
- SEARCH] 196
- Making Measurements 201
- Using Spectrum Analyzer 201
- (MEAS~USER) 203
- Figure 5-1. FFT Annotation 204
- AMPLITUDE] and 206
- FREQUENCY) and adjust the 207
- Analyzer 208
- Stimulus-Response 212
- Measurements 212
- SPECTRUM ANALYZER 215
- ATN AUTO 216
- Refer to 216
- Figure 5-9. Normalized Trace 221
- SEARCH) to 223
- Time-Gate Utility Display 228
- Gate Delay 239
- Signal Delay 239
- ENTER 50.08 MHz 250
- (FFEZT] 256
- N dB Bandwidth Measurement 260
- N dB Bandwidth Measurement 261
- Adjacent Channel Power 271
- Adjacent Channel Power Graph 272
- Measurement 274
- Channel Power 275
- Key Descriptions 277
- Diagnostic 280
- Service Diagnostic 281
- A. (Vertical lines on the 285
- A. (Vertical lines on 287
- Front-Panel Key Access 291
- (jD’spLAy-1 291
- AUTO COUPLE] 293
- AUTO COUPLE) 293
- CATALOG 0% 308
- 981861 AT 309
- COUPLE) or 311
- AMPLITUDE] 326
- Spectrum Analyzer Mode Key 328
- Oescriptions 328
- PEAK SEARCH] 333
- CAT ITEM 334
- Mode Functions 337
- this function is disabled 343
- FREQUENCY] 351
- Coupling, UPDATE TIMEFREQ 363
- SEARCH] 365
- FREQUENCY) then 366
- PEAK SEARCH) and 367
- PEAK SEARCH), MARKER A , and 367
- ZOOM the first 384
- Descrrptions 403
- [MEAS/USER) 409
- (MKRFCTN) 411
- AUTO COUPLE) or 416
- TRACKING 424
- [MEAS~USER) 426
- Key Menus 433
- If You Have a Problem 450
- More 1 of 4 455
- FREQUENCY), -37 458
- Messages 463
- AUTO COUPLE), AUTO ALL (U) 473
- Options and Accessories 478
- Accessories 484
- Glossary 488
- FM span, 6-74 525
- Index- 10 526
- Index- 11 527
- Index- 12 528
- Index- 13 529
- Index- 14 530
- Index- 15 531
- Index- 16 532
- Index- 17 533
- Index- 18 534
- Index- 19 535
- Index-20 536
- Index-22 538
- Index-23 539
- Index-24 540
- Index-25 541
- Index-26 542
- Index-27 543
- Index-28 544
- Index-29 545
- Index-30 546
- Index-32 548
- Index-33 549
- Index-34 550
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