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8712ET
Agilent Technologies 8712ET User Manual
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Option 100 F
ault Location and Structural
Return Loss Measurements
Agilent T
echnologies 8712ET/ES and 8714ET/ES
RF Network Analyzers
User’
s Guide Supplement
P
art No. 08714-90020
Printed in USA
Print Date: June 2000
Supersedes: October 1999
© Copyright 1998-2000
Agilent T
echnologies
, Inc.
2
Table of Contents
Default Chapter
2
Safety Information
2
Table of Contents
7
Introduction and Measurement Theory
10
Fault Location Measurement Theory
11
How the Analyzer Converts Frequency Data to Distance Data
13
Start/Stop Distance and Frequency Span Explanation
14
Cable Impedance and Structural Return Loss Measurement Theory
15
Cable Impedance
15
SRL and Periodic Cable Faults
19
SRL and Discrete Cable Faults
23
Techniques for Removing Connector Effects
23
Measurement Uncertainties
27
Cable Preparation
30
Cable Preparation Problems
32
Bent Cable
32
Deformed Cable
34
Contaminated Dielectric
36
Damaged Outer Conductor
38
Non-Flush Cut
40
Recommended Tools and Cables
42
Recommended Tools
42
Recommended Cables
42
Making Fault Location Measurements
43
How to Make and Interpret Fault Location Measurements
45
Select Fault Location as the Type of Measurement
46
Enter the Measurement Parameters
47
Calibrate the Analyzer
48
Connect the Equipment
51
Interpret the Measurement
52
Example Fault Location Measurements
56
Example 1: Identify Mismatches Expressed as Return Loss
56
Example 2: Identify Mismatches as the Magnitude of Reflection Coefficient
58
Example 3: Identify Mismatches at Greater Distances
59
Making SRL Measurements
62
How to Make and Interpret SRL Measurements
64
Select SRL as the Type of Measurement
64
Calibrate the Analyzer
65
Connect the Equipment
69
Determine the Connector Model
69
Perform the SRL Cable Scan
77
Interpret the SRL Measurement
80
Making Simultaneous Fault Location and SRL Measurements
81
How to Make Simultaneous Measurements
84
Making Impedance Measurements
85
How to Make Impedance Measurements
88
Characterizing and Verifying Antenna Systems
89
Antenna Feedline System
91
Potential Problems
93
Transmission Lines/Antennas
93
Connectors
94
Typical Measurements
95
Before Installation
96
Installation
96
Maintenance
97
Installation and Maintenance Planning
98
Key Reference
100
Alphabetical Key Reference
102
Characteristics
128
Overview of Characteristics
129
Frequency Range Considerations
129
Phase Considerations
129
General Performance Characteristics
130
SRL Measurement Uncertainty Vs System Directivity
131
SRL Measurement Uncertainty Vs Connector Fault
135
Minimizing Measurement Uncertainty
135
Fault Location Distance Range and Resolution
139
Range
139
Resolution
139
Typical Distance Data in Feet
140
Distance Data in Meters
143
Cable Loss and Velocity Factors
146
Other manuals for Agilent Technologies 8712ET
Programmer's Guide
320 pages
User's Handbook Supplement
158 pages
4
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Agilent Technologies 8712ET Specifications
General
Brand
Agilent Technologies
Model
8712ET
Category
Measuring Instruments
Language
English
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