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TimeSource 3100
GPS Primary Reference Source
097-72020-01
Issue 5
2
TimeSource 3100
Symmetricom, Inc.
2300 Orchard Parkway
San Jose, CA 95131-1017
http://www.symmetricom.com
Copyright © 1999–2000 Symmetricom, Inc.
All rights reserved. Printed in U.S.A.
Symmetricom is a registered trademark of Symmetricom, Inc. BesTime, DCD, and TimeSource are
trademarks of Symmetricom, Inc. All other product names, service marks, trademarks, and registered
trademarks used in this document are the property of their respective owners.
Contents
3
Description
Chapter 1
Overview . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Global Positioning System . . . . . . . . . . . . 15
Physical Description . . . . . . . . . . . . . . . . . . 16
Functional Description . . . . . . . . . . . . . . . 19
Overview . . . . . . . . . . . . . . . . . . . . . . . . 19
Antenna . . . . . . . . . . . . . . . . . . . . . . . . . 21
IF Interface . . . . . . . . . . . . . . . . . . . . . . . 21
Local Oscillator . . . . . . . . . . . . . . . . . . . 21
Clock Extractors . . . . . . . . . . . . . . . . . . 22
Power Supply . . . . . . . . . . . . . . . . . . . . 22
BesTime Ensemble Timing Generator 22
E1 or Analog Outputs . . . . . . . . . . . . . 22
Eight Additional E1 or Analog Outputs
(990-72020-02 Systems Only) . . . 23
TOD Output . . . . . . . . . . . . . . . . . . . . . 23
IRIG-B TOD Outputs
(990-72020-05 Systems Only) . . . 23
1 PPS Output . . . . . . . . . . . . . . . . . . . . 23
10 MHz Output . . . . . . . . . . . . . . . . . . 24
Two ESCIU Ports
(990-72020-04 Systems Only) . . . 24
Alarm Interface . . . . . . . . . . . . . . . . . . . 25
Communication Ports . . . . . . . . . . . . . 25
Ethernet . . . . . . . . . . . . . . . . . . . . . . . . . 25
4
TimeSource 3100
Engineering &
Ordering
Chapter 2
Antenna Guidelines . . . . . . . . . . . . . . . . . 28
Antenna Location Guidelines . . . . . . 29
Earth Ground Location Guidelines . . 32
Antenna Cable Choices . . . . . . . . . . . 33
IRIG-B TOD (990-72020-05 System
Only) . . . . . . . . . . . . . . . . . . . . . . . . 34
RJ-422–to–RS-232 TOD Converter . 34
Shelf Considerations . . . . . . . . . . . . . . . . 35
Systems . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
Standard System (Two E1 or
2.048 MHz Outputs) . . . . . . . . . . . 36
With Eight Additional E1 or
2.048 MHz Outputs . . . . . . . . . . . 37
With Two E1 Synchronization
Insertion (ESCIU) Ports . . . . . . . . 38
With Four IRIG-B TOD Outputs . . . 39
Antenna . . . . . . . . . . . . . . . . . . . . . . . . 39
User-Supplied Tools and Materials . . . . . 40
For Antenna Installation . . . . . . . . . . . 40
For Shelf Installation . . . . . . . . . . . . . . 41
Outputs, Power, and Miscellaneous . 41
Contents
5
Installation
Chapter 3
Unpacking . . . . . . . . . . . . . . . . . . . . . . . . . . 44
Antenna . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
Shelf . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
Output Module Installation . . . . . . . . . 51
Rack Mounting . . . . . . . . . . . . . . . . . . . 53
Cabling . . . . . . . . . . . . . . . . . . . . . . . . . . 55
Frame Ground . . . . . . . . . . . . . . . . . 57
Power . . . . . . . . . . . . . . . . . . . . . . . . 58
GPS Antenna . . . . . . . . . . . . . . . . . . 59
10 MHz Output . . . . . . . . . . . . . . . 59
E1 or Analog Synchronization
Outputs . . . . . . . . . . . . . . . . . . . . . . 60
Expansion Bus . . . . . . . . . . . . . . . . . 61
1 PPS Output . . . . . . . . . . . . . . . . . 61
E1 or Analog Reference Inputs . . . 62
Remote Oscillator Inputs . . . . . . . . 63
Module for Additional E1 or
Analog Outputs . . . . . . . . . . . . . . . . 64
Module for IRIG-B TOD Outputs . 65
Module for ESCIU Ports . . . . . . . . 66
Time of Day Output . . . . . . . . . . . . 71
Ethernet . . . . . . . . . . . . . . . . . . . . . . 72
Communication Port 1 . . . . . . . . . 73
Communication Port 2 . . . . . . . . . 74
Alarms Output . . . . . . . . . . . . . . . . 75
Craft Port . . . . . . . . . . . . . . . . . . . . . 76
Power-Up . . . . . . . . . . . . . . . . . . . . . . . . . . 77
6
TimeSource 3100
TL1 Reference
Chapter 4
Conventions . . . . . . . . . . . . . . . . . . . . . . . 90
Command Format . . . . . . . . . . . . . . . . . . 92
Response Format . . . . . . . . . . . . . . . . . . . 93
Parameters . . . . . . . . . . . . . . . . . . . . . . . . 95
Autonomous Messages . . . . . . . . . . . . . . 99
Report Alarm . . . . . . . . . . . . . . . . . . . 100
Report Event . . . . . . . . . . . . . . . . . . . . 101
Factory-Set Values . . . . . . . . . . . . . . . . . . 102
Tasks/Commands . . . . . . . . . . . . . . . . . . . 105
Commands . . . . . . . . . . . . . . . . . . . . . . . . 107
Activate User . . . . . . . . . . . . . . . . . . . . 108
Cancel User . . . . . . . . . . . . . . . . . . . . . 109
Copy Memory . . . . . . . . . . . . . . . . . . . 110
Delete Equipment . . . . . . . . . . . . . . . . 113
Delete User Security . . . . . . . . . . . . . 114
Edit Communication . . . . . . . . . . . . . . 115
Edit Date . . . . . . . . . . . . . . . . . . . . . . . 119
Edit Equipment . . . . . . . . . . . . . . . . . . 121
Enter Equipment . . . . . . . . . . . . . . . . . 128
Enter User Security . . . . . . . . . . . . . . . 130
Initialize Register . . . . . . . . . . . . . . . . . 131
Initialize System . . . . . . . . . . . . . . . . . . 132
Contents
7
Operate Alarm Cutoff All . . . . . . . . . 133
Retrieve Alarm All . . . . . . . . . . . . . . . 134
Retrieve Alarm Equipment . . . . . . . . 135
Retrieve Communication . . . . . . . . . . 137
Retrieve Condition All . . . . . . . . . . . . 141
Retrieve Condition Equipment . . . . . 142
Retrieve Equipment . . . . . . . . . . . . . . 144
Retrieve GPS Status . . . . . . . . . . . . . . 151
Retrieve Inventory . . . . . . . . . . . . . . . 153
Retrieve Performance Monitoring . . . 155
Retrieve User Security . . . . . . . . . . . . 171
Set Source Identifier . . . . . . . . . . . . . . 172
Troubleshooting
Chapter 5
Troubleshooting with Front Panel Items 174
Troubleshooting with Error Messages . . 180
Card Replacement . . . . . . . . . . . . . . . . . . 188
Repair and Return . . . . . . . . . . . . . . . . . . 190
Technical Assistance . . . . . . . . . . . . . . . . . 192
Sales . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 193
Manual Updates . . . . . . . . . . . . . . . . . . . . 194
8
TimeSource 3100
Specifications
Chapter 6
Antenna . . . . . . . . . . . . . . . . . . . . . . . . 196
Communication Ports . . . . . . . . . . . . 197
Port 1 . . . . . . . . . . . . . . . . . . . . . . . 197
Port 2 . . . . . . . . . . . . . . . . . . . . . . . 198
Craft Port . . . . . . . . . . . . . . . . . . . . 199
Ethernet Port . . . . . . . . . . . . . . . . . . . . 200
Time of Day Outputs . . . . . . . . . . . . . 201
Network Time Protocol (NTP),
Type 4, Format 2 Driver Format 201
Cisco Systems Format . . . . . . . . . . 202
IRIG-B TOD Outputs
(990-72020-05 System Only) . 203
Remote Oscillator Inputs . . . . . . . . . . 204
E1 Inputs . . . . . . . . . . . . . . . . . . . . . . . 205
Analog 2.048 MHz Inputs . . . . . . . . . 206
1 PPS Output . . . . . . . . . . . . . . . . . . . 207
E1 Outputs . . . . . . . . . . . . . . . . . . . . . 208
Standard . . . . . . . . . . . . . . . . . . . . . 208
Additional E1 Outputs
(990-72020-02 System Only) . 210
Analog 2.048 MHz Outputs . . . . . . . 212
Standard . . . . . . . . . . . . . . . . . . . . . 212
10 MHz Output . . . . . . . . . . . . . . . . . 214
ESCIU Ports
(990-72020-04 System Only) . . . 215
Contents
9
Office Alarms . . . . . . . . . . . . . . . . . . . . 216
Connector Panel Contacts . . . . . . 216
Front Panel Lamps . . . . . . . . . . . . . 216
Front Panel Control . . . . . . . . . . . . 217
Power . . . . . . . . . . . . . . . . . . . . . . . . . . 217
Shelf Mechanical . . . . . . . . . . . . . . . . . 218
Shelf Environmental . . . . . . . . . . . . . . 218
10
TimeSource 3100
Acronyms and Abbreviations
pps pulse per second
PRS primary reference source
UTC Universal Coordinated Time
Contents
11
FCC Regulatory Notice
Warning: This equipment generates, uses, and can radiate radio
frequency energy, and if not used in accordance with the instruction
manual, may cause interference to radio communications. It has
been tested and found to comply with the limits for a Class A
computing device pursuant to Subpart B of Part 15 of FCC rules,
which are designed to provide reasonable protection against such
interference when operated in a commercial environment. Operation
of this equipment in a residential area is likely to cause interference
in which case the user at his own expense will be required to take
whatever measures may be required to correct the interference.
12
TimeSource 3100
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1
Chapter
Description
This chapter provides an overview of the
global positioning system, and a physical
and functional description.
Chapter
14
TimeSource 3100
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Overview
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Description
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16
TimeSource 3100
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Physical Description
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Figure 1. Shelf
990-72020-01, -02, -05 Systems
990-72020-04 Systems
1
Description
19
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Functional Description
Overview
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Table A. Timing Source Characteristics
Source Characteristic
Local Oscillator Short term stability
E1 Line Intermediate term stability
External Oscillator Intermediate term stability
GPS Signal Long term stability
20
TimeSource 3100
SSSSSSSSSSSS SSSSSSSSSS SSSSSSS
Figure 3. Block Diagram
Status lamps
BesTime
Ensemble
Timing
Generator
Antenna
input
E1/analog output A
Alarms
–48 V A
Power to
shelf
E1/analog
span input #1
Clock
Extractor
10 MHz output
Power
Supply
Clock input & dc
power to antenna
Clock
Extractor
Clock
Extractor
E1/analog
span input #2
Remote
oscillator
input #1
Remote
Oscillator
Input #2
E1/analog output B
1 pps output
Optional sources
–48 V B
Local
Oscillator
8 E1/analog
outputs
IF
Interface
Clock
Extractor
COM ports
4 IRIG-B TOD
outputs
TOD output
Optional ports
2 ESCIU ports
Ethernet port
Micro-
processor
Alarm
Interface
/