3.2.3.3 Leap Second Correction Sequence 105
3.2.3.4 Configuring a Leap Second 106
3.2.4 Local Clock(s), DST 107
3.2.4.1 Adding a Local Clock 107
3.2.4.2 DST Examples 109
3.2.4.3 DST and UTC, GMT 110
3.3 Managing References 111
3.3.1 Input Reference Priorities 111
3.3.1.1 Configuring Input Reference Priorities 112
3.3.1.2 The "Local System" Reference 115
3.3.1.3 The "User/User" Reference 116
3.3.1.4 Reference Priorities: EXAMPLES 118
3.3.2 Reference Qualification and Validation 122
3.3.2.1 Reference Monitoring: Phase 122
3.3.3 The GNSS Reference 123
3.3.3.1 Reviewing the GNSS Reference Status 124
3.3.3.2 Determining Your GNSS Receiver Model 128
3.3.3.3 Selecting a GNSS Receiver Mode 129
3.3.3.4 Setting GNSS Receiver Dynamics 132
3.3.3.5 Performing a GNSS Receiver Survey 133
3.3.3.6 GNSS Receiver Offset 134
3.3.3.7 Resetting the GNSS Receiver 135
3.3.3.8 Deleting the GNSS Receiver Position 136
3.3.3.9 Manually Setting the GNSS Position 138
3.3.3.10 GNSS Constellations 140
3.3.3.11 A-GPS 143
3.3.4 Holdover Mode 148
3.4 Managing the Oscillator 152
3.4.1 Configuring the Oscillator 153
3.4.1.1 Time Figure of Merit (TFOM) 155
3.4.2 Monitoring the Oscillator 156
3.4.3 Oscillator Logs 159
CHAPTER 4
System Administration 161
4.1 Issuing the HALT Command Before Removing Power 162
4.2 Rebooting the System 163
VI VelaSync User's Manual • TABLE OF CONTENTS
