Symmetricom TimeSource 2500 Manuale utente

TimeSource 2500

GPS Primary Reference Source

097-71000-02

Issue 3

2TimeSource 2500

Symmetricom, Inc.

2300 Orchard Parkway

San Jose, CA 95131-1017

http://www.symmetricom.com

All product names, service marks, trademarks and registered trademarks

used in this document are the property of their respective owners.

Contents 3

Description

Chapter 1

Introduction . . . . . . . . . . . . . . . . . . . . . . . . 14

Global Positioning System . . . . . . . . . . . . 15

Physical Description . . . . . . . . . . . . . . . . . 16

Functional Description . . . . . . . . . . . . . . . 18

Overview. . . . . . . . . . . . . . . . . . . . . . . . 18

Antenna . . . . . . . . . . . . . . . . . . . . . . . . . 20

GPS Receiver . . . . . . . . . . . . . . . . . . . . 20

Local Oscillator . . . . . . . . . . . . . . . . . . . 20

Clock Extractors. . . . . . . . . . . . . . . . . . 20

Power Supply . . . . . . . . . . . . . . . . . . . . 21

BesTime Ensemble Timing Generator 21

T1 Output . . . . . . . . . . . . . . . . . . . . 21

10 MHz Output . . . . . . . . . . . . . . . 21

TOD Output . . . . . . . . . . . . . . . . . . 22

BTMONitor Software . . . . . . . . . . . . . 22

Alarm Interface . . . . . . . . . . . . . . . . . . . 22

4TimeSource 2500

Engineering &

Ordering

Chapter 2

Antenna Location Guidelines. . . . . . . . . . 24

Cabling Considerations . . . . . . . . . . . . . . 26

Window Antenna . . . . . . . . . . . . . . . . 26

Antenna-to-Shelf Distance

Up to 40 Feet . . . . . . . . . . . . . . 27

Antenna-to-Shelf Distance

Up to 100 Feet . . . . . . . . . . . . . 28

Antenna-to-Shelf Distance

Up to 150 Feet . . . . . . . . . . . . . 29

Antenna-to-Shelf Distance

Up to 200 Feet . . . . . . . . . . . . . 30

Wall Antenna . . . . . . . . . . . . . . . . . . . . 31

Antenna-to-Shelf Distance

Up to 40 Feet . . . . . . . . . . . . . . 31

Antenna-to-Shelf Distance

Up to 100 Feet . . . . . . . . . . . . . 33

Antenna-to-Shelf Distance

Up to 150 Feet . . . . . . . . . . . . . 34

Antenna-to-Shelf Distance

Up to 200 Feet . . . . . . . . . . . . . 35

Shelf Considerations . . . . . . . . . . . . . . . . . 36

Rack Mounted. . . . . . . . . . . . . . . . . . . . 36

Wall Mounted. . . . . . . . . . . . . . . . . . . . 36

Computer Requirements . . . . . . . . . . . . 37

Systems . . . . . . . . . . . . . . . . . . . . . . . . . . . 38

Contents 5

Installation

Chapter 3

Unpacking . . . . . . . . . . . . . . . . . . . . . . . . . 46

Antenna . . . . . . . . . . . . . . . . . . . . . . . . . . . 47

Window Antenna Installation . . . . . . . 47

Antenna Mounting . . . . . . . . . . . . . 47

Antenna Cabling . . . . . . . . . . . . . . . 48

Wall Antenna Installation. . . . . . . . . . . 56

Antenna Mounting . . . . . . . . . . . . . 56

Antenna Cabling . . . . . . . . . . . . . . 59

Shelf . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67

Rack Mounting . . . . . . . . . . . . . . . . . . . 67

Wall Mounting . . . . . . . . . . . . . . . . . . . 71

Cabling . . . . . . . . . . . . . . . . . . . . . . . . . . 71

Frame Ground. . . . . . . . . . . . . . . . . 73

Power . . . . . . . . . . . . . . . . . . . . . . . . 77

T1 Outputs . . . . . . . . . . . . . . . . . . . 79

Local Communication Port . . . . . . 81

Alarm Outputs . . . . . . . . . . . . . . . . 82

Remote Communication Port. . . . 83

T1 and 5 MHz Inputs . . . . . . . . . . . 84

Time of Day Output. . . . . . . . . . . . 86

10 MHz Output . . . . . . . . . . . . . . . 87

GPS Antenna . . . . . . . . . . . . . . . . . . 87

Power-Up . . . . . . . . . . . . . . . . . . . . . . . . . . 88

Remote Operation via a Modem

(Optional) . . . . . . . . . . . . . . . . . . . . . . . 99

Remote Operation via a Terminal

Server (Optional). . . . . . . . . . . . . . . . . 104

6TimeSource 2500

Operation

Chapter 4

Introduction . . . . . . . . . . . . . . . . . . . . . . . . 112

View Alarms and Alarm Thresholds . . . 113

Change Alarm Thresholds . . . . . . . . . . . 115

View Span Framing and Trouble Code

Sent During Major Alarm . . . . . . . . . 117

View BT3 (TimeSource 2500) Mode

and Duration . . . . . . . . . . . . . . . . . . . . 118

View Alarm Log . . . . . . . . . . . . . . . . . . . . 119

Clear Alarm Log . . . . . . . . . . . . . . . . . . . . 120

Change Location ID . . . . . . . . . . . . . . . . . 121

Change Elevation Mask . . . . . . . . . . . . . . 122

Enable or Disable Inputs . . . . . . . . . . . . . 123

Ensemble Inputs or Exclude Inputs from

Ensemble . . . . . . . . . . . . . . . . . . . . . . . 124

View Input Weighting and Gear . . . . . . . 125

View Input Performance Statistics . . . . . 126

Set Span Framing and Trouble Code

Sent During Major Alarm . . . . . . . . . 128

Contents 7

Operation

Chapter 4

(cont’d)

Set TOD Output Format . . . . . . . . . . . . 130

View GPS Tracking Statistics . . . . . . . . . . 131

View GPS Satellite Information . . . . . . . 132

View Daily Holdover Information . . . . . 134

View Monthly Holdover Information . . . 136

Reset GPS Receiver and System . . . . . . 138

Download New Software . . . . . . . . . . . . 139

View User Accounts . . . . . . . . . . . . . . . . 141

Add User Account . . . . . . . . . . . . . . . . . . 142

Delete User Account . . . . . . . . . . . . . . . . 145

Edit User Account . . . . . . . . . . . . . . . . . . 146

Change Password . . . . . . . . . . . . . . . . . . . 148

View BTMONitor Software Version . . . 149

View Communication Information . . . . . 150

View System Firmware Information . . . . 151

8TimeSource 2500

Troubleshooting

Chapter 5

Front Panel Lamps. . . . . . . . . . . . . . . . . . . 154

Theory of Alarm Processing and

Troubleshooting . . . . . . . . . . . . . . . . . . 156

GPS Event and Alarm Summary . . . . 162

GPS Frequency Transient Event . . 163

GPS Frequency Event . . . . . . . . . . 163

GPS Frequency Alarm . . . . . . . . . . 164

GPS Drift Transient Event . . . . . . 164

GPS Drift Event . . . . . . . . . . . . . . . 165

GPS Drift Alarm . . . . . . . . . . . . . . 165

GPS Time Accuracy Transient Event 166

GPS Clock Bias Transient Event . . 166

GPS Tracking Success Alarm . . . . 166

Antenna Alarm . . . . . . . . . . . . . . . 167

Span Input Event and Alarm

Summary . . . . . . . . . . . . . . . . . . . . . 168

Span Frequency Transient Event . 168

Span Frequency Alarm . . . . . . . . . 169

Span Drift Transient Event . . . . . . 169

Span Drift Alarm . . . . . . . . . . . . . . 170

Span Phase Transient Event . . . . . 170

Span Phase Alarm . . . . . . . . . . . . . 171

Span Jitter Alarm . . . . . . . . . . . . . . 171

Remote Oscillator (RO) Input

Event and Alarm Summary . . . . . . 172

RO Frequency Transient Event . . 172

RO Frequency Alarm . . . . . . . . . . 173

RO Drift Transient Event . . . . . . . 173

RO Drift Alarm . . . . . . . . . . . . . . . 174

RO Phase Transient Event . . . . . . 174

RO Phase Alarm . . . . . . . . . . . . . . 175

RO Jitter Alarm . . . . . . . . . . . . . . . 175

Contents 9

Troubleshooting

Chapter 5

(cont’d)

Phase Locked Loop (PLL) Event

and Alarm Summary . . . . . . . . . . . 176

PLL Step Event . . . . . . . . . . . . . . . . 176

PLL Step Alarm . . . . . . . . . . . . . . . 177

PLL Range Event . . . . . . . . . . . . . . 177

PLL Range Alarm . . . . . . . . . . . . . . 178

PLL Jitter Alarm . . . . . . . . . . . . . . . 178

Temperature (TP) Event and

Alarm Summary . . . . . . . . . . . . . . . 179

TP Step Event . . . . . . . . . . . . . . . . . 179

TP Step Alarm . . . . . . . . . . . . . . . . 179

TP Slew Event . . . . . . . . . . . . . . . . 180

TP Slew Alarm . . . . . . . . . . . . . . . . 180

TL1 Messages . . . . . . . . . . . . . . . . . . . . . . 181

Formats . . . . . . . . . . . . . . . . . . . . . . . . 181

Alarms . . . . . . . . . . . . . . . . . . . . . . . 181

Events . . . . . . . . . . . . . . . . . . . . . . . 181

Parameters . . . . . . . . . . . . . . . . . . . . . . 182

Message Troubleshooting . . . . . . . . . . 184

Repair and Return . . . . . . . . . . . . . . . . . . . 188

Technical Assistance. . . . . . . . . . . . . . . . . . 190

Sales. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 191

Manual Updates . . . . . . . . . . . . . . . . . . . . . 192

10 TimeSource 2500

Specifications

Chapter 6

Antenna . . . . . . . . . . . . . . . . . . . . . . . . . 194

Window . . . . . . . . . . . . . . . . . . . . . 194

Wall . . . . . . . . . . . . . . . . . . . . . . . . . 194

Remote Communication Port . . . . . . 195

Craft Communication Port . . . . . . . . . 195

T1 Inputs . . . . . . . . . . . . . . . . . . . . . . . . 196

Remote Oscillator Inputs . . . . . . . . . . 197

T1 Outputs . . . . . . . . . . . . . . . . . . . . . . 198

Time of Day Output . . . . . . . . . . . . . . 199

10 MHz Output . . . . . . . . . . . . . . . . . . 200

Alarms . . . . . . . . . . . . . . . . . . . . . . . . . . 201

Indicators . . . . . . . . . . . . . . . . . . . . . . . . 201

Power. . . . . . . . . . . . . . . . . . . . . . . . . . . 202

Shelf Mechanical . . . . . . . . . . . . . . . . . . 202

Wire-Wrap Panel Mechanical . . . . . . 203

Shelf and Wire-Wrap Panel

Environmental . . . . . . . . . . . . . . . . . 203

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