Contents
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Chapter 9
Digital Analysis (QAM View OPT4)
Introduction .....................................................................................................149
Quick Start.......................................................................................................150
Selecting a Digital Analysis Mode ..............................................................150
Using the Navigator Menu.....................................................................150
Using the Measurement Mode Keys......................................................150
Correcting Signal Lock Errors...............................................................151
Digital Summary Mode (Quick Start) .........................................................151
QAM Ingress Mode (Quick Start)...............................................................152
Constellation Mode (Quick Start)................................................................152
Equalizer Mode (Quick Start)......................................................................153
Digital Summary Mode...................................................................................153
Features and Definitions..............................................................................154
DIGITAL Main Screen Features ...........................................................154
Modulation Error Ratio (MER) .............................................................154
Error Vector Magnitude (EVM) ............................................................154
Bit Error Rate (BER) .............................................................................154
Forward Error Correction (FEC) ...........................................................155
Modulation Format ................................................................................155
Symbol Rate...........................................................................................155
DETAIL Display....................................................................................155
Equalizer Stress......................................................................................156
Carrier Offset .........................................................................................156
Basic Operation ...........................................................................................156
Viewing the DETAIL Display...............................................................157
Viewing the QAM Level Display..........................................................157
Editing the Modulation Format..............................................................158
Editing the Symbol Rate........................................................................159
QAM Ingress Mode.........................................................................................160
Features and Definitions..............................................................................160
QAM INGRESS Main Screen Features.................................................160
Basic Operation ...........................................................................................161
Measuring QAM INGRESS ..................................................................162
Editing the Modulation Format or Symbol Rate....................................163
Editing the Reference Level...................................................................164
Editing the Scale Parameter...................................................................164
Selecting the Maximum Hold Function.................................................165
Constellation Mode..........................................................................................166
Constellation Basics.....................................................................................166
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