Acterna SDA-5000 - Page 11

Contents
x
Reverse SWEEP Screens.........................................................................85
Reverse Frequency Screen.......................................................................86
Reverse Level Screen...............................................................................86
Reverse Noise Screen ..............................................................................87
Reverse Noise Level Screen ....................................................................88
Reverse Noise Frequency Screen.............................................................89
Reverse Amplifier Alignment Screens..........................................................90
REV ALIGNMENT Main Screen ...........................................................90
REV ALIGNMENT Level Screen...........................................................91
Sweepless Sweep ................................................................................................92
Loopback Sweep (OPT2)..................................................................................93
Chapter 5
Reverse Path Troubleshooting
Introduction .......................................................................................................95
Problems in Advanced Services .......................................................................96
Problems in Troubleshooting the Reverse Path.............................................98
Improving Accuracy and Reducing Wasted Time.........................................98
Tools for Combating Reverse Ingress ...........................................................99
CPD (Common Path Distortion) Analysis.....................................................100
Recommended Setup for CPD Analysis......................................................101
Evaluating TDMA Return Path Signals........................................................102
Variable Time Slot TDMA..........................................................................103
Troubleshooting TDMA..............................................................................104
Zero Span Measurements.......................................................................104
Chapter 6
Measuring System Performance
Introduction .....................................................................................................109
A Word About Measurement Screens and Icons.........................................109
Measuring Signal Levels.................................................................................110
Level Measurements....................................................................................110
Tilt Measurements .......................................................................................112
Tilt Compensation..................................................................................113
Balancing Amplifiers.............................................................................114
Scan Measurements .....................................................................................115
Scan Rates..............................................................................................116