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89410A
Agilent Technologies 89410A User Manual
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21
Gating
Concepts
21
- 1
268
270
Table of Contents
Default Chapter
19
Table of Contents
19
1 Demodulating an Analog Signal
29
To Perform am Demodulation
30
To Perform PM Demodulation
32
To Perform FM Demodulation
34
2 Measuring Phase Noise
37
To Measure Phase Noise
38
Special Considerations for Phase Noise Measurements
39
3 Characterizing a Transient Signal
41
To Set up Transient Analysis
42
To Analyze a Transient Signal with Time Gating
44
To Analyze a Transient Signal with Demodulation
45
4 Making On/Off Ratio Measurements
47
To Set up Time Gating
48
To Measure the On/Off Ratio
50
5 Making Statistical Power Measurements
51
To Display CCDF
52
To Display Peak, Average, and Peak/Average Statistics
54
6 Creating Arbitrary Waveforms
57
To Create a Waveform Using a Single, Measured Trace
58
To Create a Waveform Using Multiple, Measured Traces
60
To Create a Short Waveform Using ASCII Data
62
To Create a Long Waveform Using ASCII Data
64
To Create a Contiguous Waterfall or Spectrogram Display
66
To Create a Fixed-Length Waterfall Display
68
To Determine Number of Samples and ∆T
70
To Output the Maximum Number of Samples
71
7 Using Waterfall and Spectrogram Displays (Opt. AYB)
73
To Create a Test Signal
74
To Set up and Scale a Waterfall Display
76
To Select a Trace in a Waterfall Display
78
To Use Markers with Waterfall Displays
80
To Use Buffer Search in Waterfall Displays
82
To Set up a Spectrogram Display
83
To Enhance Spectrogram Displays
84
To Use Markers with Spectrogram Displays
86
To Save Waterfall and Spectrogram Displays
87
To Recall Waterfall and Spectrogram Displays
88
8 Using Digital Demodulation (Opt. AYA)
89
To Prepare a Digital Demodulation Measurement
90
To Demodulate a Standard-Format Signal
92
To Select Measurement and Display Features
93
To Set up Pulse Search
94
To Set up Sync Search
96
To Select and Create Stored Sync Patterns
97
To Demodulate and Analyze an EDGE Signal
98
To Troubleshoot an EDGE Signal
100
To Demodulate and Analyze an MSK Signal
102
To Demodulate a Two-Channel I/Q Signal
104
9 Using Video Demodulation (Opt. AYH)
105
To Prepare a VSB Measurement
106
To Determine the Center Frequency for a VSB Signal
108
To Demodulate a VSB Signal
110
To Prepare a QAM or DVB QAM Measurement
112
To Demodulate a QAM or DVB QAM Signal
114
To Select Measurement and Display Features
116
To Set up Sync Search (QAM Only)
117
To Select and Create Stored Sync Patterns (QAM Only)
118
To Demodulate a Two-Channel I/Q Signal
119
10 Analyzing Digitally Demodulated Signals (Options AYA and AYH)
121
To Demodulate a Non-Standard-Format Signal
122
To Use Polar Markers
124
To View a Single Constellation State
125
To Locate a Specific Constellation Point
126
To Use X-Axis Scaling and Markers
127
To Examine Symbol States and Error Summaries
128
To View and Change Display State Definitions
130
To View Error Displays
132
11 Creating User-Defined Signals (Options AYA and AYH)
133
To Create an Ideal Digitally Modulated Signal
134
To Check a Created Signal
136
To Create a User-Defined Filter
138
12 Using Adaptive Equalization (Options AYA and AYH)
141
To Determine if Your Analyzer Has Adaptive Equalization
142
To Load the Multi-Path Signal from the Signals Disk
143
To Demodulate the Multi-Path Signal
144
To Apply Adaptive Equalization
146
To Measure Signal Paths
148
To Learn more about Equalization
150
13 Using Wideband CDMA (Options B73, B79, and 080)
151
To View a W-CDMA Signal
152
To Demodulate a W-CDMA Signal
154
To View Data for a Single Code Layer
156
To View Data for a Single Code Channel
158
To View Data for One or more Slots
160
To View the Symbol Table and Error Parameters
162
To Use X-Scale Markers on Code-Domain Power Displays
164
14 Using the LAN (Options UTH & UG7)
165
To Determine if You Have Options UTH and UG7
166
To Connect the Analyzer to a Network
167
To Set the Analyzer's Network Address
168
To Activate the Analyzer's Network Interface
169
To Send GPIB Commands to the Analyzer
170
To Select the Remote X-Windows Server
171
To Initiate Remote X-Windows Operation
172
To Use the Remote X-Windows Display
173
To Transfer Files Via the Network
174
15 Using the Agilent 89411A Downconverter
175
Connection and Setup Details for the Agilent 89411A
178
Calibration
182
16 Extending Analysis to 26.5 Ghz with 20 Mhz Information Bandwidth
187
Overview
188
System Description
189
Agilent 89410A Operation
191
Hp/Agilent 71910A Operation
191
Mirrored Spectrums
192
IBASIC Example Program
192
System Configuration
193
Agilent 89410A Configuration
193
Hp/Agilent 71910A Configuration
194
System Connections
196
Operation
199
Controlling the Receiver
200
Changing Center Frequency
200
Setting the Mirror Frequency Key
200
Changing the Reference Level
200
Resolution Bandwidth
202
DC Offset and lo Feedthrough
202
Calibrating the System
203
Calibration Methods
204
DC Offset
205
Channel Match
206
IQ Gain, Delay Match
206
Quadrature
208
17 Choosing an Instrument Mode
209
Why Use Scalar Mode
210
Why Use Vector Mode
212
Why Use Analog Demodulation Mode
214
The Advantage of Using Multiple Modes
215
Scalar-The Big Picture
215
Vector-The Important Details
215
Analog Demodulation-Another View of the Details
215
Instrument Mode? Measurement Data? Data Format
216
Instrument Modes
216
Measurement Data
216
Data Format
216
Unique Capabilities of the Instrument Modes
217
18 What Makes this Analyzer Different
221
Time Domain and Frequency Domain Measurements
222
The Y-Axis (Amplitude)
223
The X-Axis (Frequency)
223
What Are the Different Types of Spectrum Analyzers
224
Swept-Tuned Spectrum Analyzers
224
Real-Time Spectrum Analyzers
225
Parallel-Filter Analyzers
225
FFT Analyzers
226
The Difference
228
Vector Mode and Zoom Measurements
228
Stepped FFT Measurements in Scalar Mode
229
19 Fundamental Measurement Interactions
233
Measurement Resolution and Measurement Speed
234
Resolution Bandwidth
234
Video Filtering
235
Frequency Span
235
Bandwidth Coupling
236
Flexible Bandwidth Mode
236
Display Resolution and Frequency Span
237
Windowing
238
General
238
Windows Used with this Analyzer
238
Enhancing the Measurement Speed
240
Digital Storage
241
Zero Response and DC Measurements
241
Special Considerations in Scalar Mode
242
Sweep Time Limitations
242
Stepped Measurements
242
The Relationship between Frequency Resolution and Display Resolution
243
Resolution Bandwidth Limitations
243
What Is a Detector and Why Is One Needed
244
Manual Sweep
245
Special Considerations in Vector Mode
246
Time Data
247
The Time Record
248
Why Is a Time Record Needed
248
Time Record, Span and Resolution Bandwidth
249
Measurement Speed and Time Record Length
249
How Do the Parameters Interact
250
Time Record Length Limitations
251
Time Record Processing
252
20 Analog Demodulation Concepts
255
What Is Analog Demodulation
256
Applications
256
Using Analog Demodulation for Zero Span Measurements
256
How Does Analog Demodulation Work in the Agilent 89400 Series Analyzer
257
Special Considerations for Analog Demodulation
258
Time Correction and Analog Demodulation
259
The Importance of Span Selection
260
Including All Important Signal Data
260
Checking for Interfering Signals
261
The Importance of Carrier Identification
262
Auto Carrier with am Demodulation
262
Auto Carrier with PM Demodulation
262
Auto Carrier with FM Demodulation
262
Special Considerations for Auto Carrier Use
262
AM Demodulation Specifics
263
The Algorithm
263
PM Demodulation Specifics
264
The Algorithm
264
Auto Carrier off
264
Auto Carrier on
264
FM Demodulation Specifics
266
The Algorithm
266
Interactions with Other Features
267
Choosing Trigger Type with Analog Demodulation
267
Using Gating and Averaging with Analog Demodulation
267
Two-Channel Measurements and Analog Demodulation
267
21 Gating Concepts
269
What Is Time Gating
270
How Does It Work
272
Important Concepts
273
Parameter Interactions
274
22 Digital Demodulation Concepts (Opt. AYA)
275
Overview
276
What You Learn in this Chapter
276
If You Need Background References
276
What this Analyzer Does
276
Measurement Flow
277
General Block Diagram
277
Digital Demodulator Block Diagram (Except FSK)
278
Digital Demodulator Block Diagram: FSK
279
Measurement Management
281
Measurement and Display Choices
281
Carrier Locking
281
I-Q Measured Signal
283
I-Q Reference Signal
283
Special Considerations for FSK Demodulation
283
Parameter Interactions
284
Span Considerations
284
Data Size Considerations
285
Resolution Bandwidth
285
Display Limitations
285
Feature Availability in Digital Demod
286
Special Considerations for Sync Search
287
Special Considerations for Pulsed Signals
288
Speed and Resolution Considerations
289
Maximizing Speed - Measurement and Display
289
Maximizing Resolution
289
Filtering
290
General Information
290
Filter Choices for the Measured and Reference Signals
290
Square-Root Raised Cosine Filters
291
Raised Cosine Filters
291
Gaussian Filter
292
Low Pass Filter (for FSK)
292
User Defined Filters
292
IS-95 Filters
293
EDGE Filter
294
EDGE (Winrc) Filter
294
23 Video Demodulation Concepts (Opt. AYH)
295
Overview
296
What You Learn in this Chapter
296
What Option AYH Does
296
Measurement Flow
297
General Block Diagram
297
Digital Demodulator Block Diagram: QAM and DVB QAM
298
Digital Demodulator Block Diagram: VSB
300
Measurement Management
301
Measurement and Display Choices
301
Carrier Locking (All Except VSB)
301
Carrier Locking and Pilot Search: VSB
303
Input Range
304
I-Q Measured Signal
304
I-Q Reference Signal
304
Parameter Interactions
305
Data Size Considerations
305
Resolution Bandwidth
305
Span Considerations
306
Display Limitations
307
Feature Availability in Video Demodulation
308
Special Considerations for Sync Search
309
Special Considerations for Pulsed Signals
310
Maximizing Speed - Measurement and Display
310
Maximizing Resolution
310
Filtering
311
General Information
311
24 Wideband CDMA Concepts (Options B73, B79, and 080)
313
Overview
314
What You Learn in this Chapter
314
What Option B73 Does
314
What Option B79 Does
315
What Option 080 Does
315
Measurement Flow
316
Setting up a W-CDMA Measurement
318
Signal Connections and Input Range
318
Frequency Span
318
Center Frequency
319
Scramble Code
319
Chip Rates, Code Layers, and Symbol Rates
320
Main Length
321
Filtering
321
Mirrored Spectrums
321
Time-Domain Corrections
321
Trigger Signal
322
Viewing Measurement Results
323
Code-Domain Power Displays
324
Time-Domain Displays
325
Time Gating
326
Parameter Interactions
327
Data Size Considerations
327
Resolution Bandwidth
327
Points Per Symbol
327
Feature Availability in W-CDMA
328
Troubleshooting W-CDMA Measurements
329
Index
331
Need Assistance
337
Other manuals for Agilent Technologies 89410A
Service Guide
184 pages
Installation And Verification
118 pages
Getting Started Guide
88 pages
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Agilent Technologies 89410A Specifications
General
Brand
Agilent Technologies
Model
89410A
Category
Measuring Instruments
Language
English
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