Symmetricom TimeSource 3600 User Manual

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TimeSource 3600

GPS Primary Reference Source

097-72060-01

Issue 2

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.

Symmetricom, Inc.

2300 Orchard Parkway

San Jose, CA 95131-1017

http://www.symmetricom.com

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 proper ty of their respective owners.

TimeSource 3600

Acronyms and Abbreviations

AIS alarm indication signal E1 digital transmission (2.048 Mb/s) ESD electrostatic discharge ESF extended superframe GPS Global Positioning System LOS loss of signal MDEV mean time deviation pps pulse per second PRS primary reference source RO remote oscillator SSM synchronization status messaging TDEV time deviation TOD time of day UTC Universal Coordinated Time

Contents

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TimeSource 3600

Description

Chapter 1

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

Global Positioning System . . . . . . . . . . . . 19

Physical Description . . . . . . . . . . . . . . . . . 20

Roof Antenna . . . . . . . . . . . . . . . . . . . 22

Mechanical Window Antenna . . . . . . 23

Self-Adhesive Window Antenna . . . . 24

Wall Antenna . . . . . . . . . . . . . . . . . . . . 25

Functional Description . . . . . . . . . . . . . . . 26

Overview . . . . . . . . . . . . . . . . . . . . . . . 26

Antenna . . . . . . . . . . . . . . . . . . . . . . . . 28

IF Interface . . . . . . . . . . . . . . . . . . . . . . 28

GPS Receiver . . . . . . . . . . . . . . . . . . . . 28

Local Oscillator . . . . . . . . . . . . . . . . . . 28

Clock Extractors . . . . . . . . . . . . . . . . . 29

Power Supply . . . . . . . . . . . . . . . . . . . . 29

BesTime Ensemble Timing Generator 29

E1 or Analog Outputs . . . . . . . . . . . . 29

Eight Additional E1 or Analog Outputs

(990-72060-02 Systems Only) . . . 30

TOD Output . . . . . . . . . . . . . . . . . . . . 30

IRIG-B TOD Outputs

(990-72060-05 Systems Only) . . . 30

1 PPS Output . . . . . . . . . . . . . . . . . . . 30

Description

Chapter 1 (cont’d)

10 MHz Output . . . . . . . . . . . . . . . . . 31

Two ESCIU Por ts

(990-72060-04 Systems Only) . . . 31

Alarm Interface . . . . . . . . . . . . . . . . . . 32

Communication Ports . . . . . . . . . . . . 32

Ethernet . . . . . . . . . . . . . . . . . . . . . . . . 32

Engineering & Ordering

Chapter 2

Antenna Guidelines . . . . . . . . . . . . . . . . . 36

Roof Antenna Location and

Cabling Guidelines . . . . . . . . . . . . . 38

Roof Antenna Earth Ground Location

Guidelines . . . . . . . . . . . . . . . . . . . . 42

Roof Antenna Cable Choices . . . . . . 43

Window and Wall Antenna

Location Guidelines . . . . . . . . . . . . 45

Window and Wall Antenna

Cable Choices . . . . . . . . . . . . . . . . 47

IRIG-B TOD

(990-72060-05 System Only) . . . 48

RJ-422–to–RS-232 TOD Converter . 48

Shelf Considerations . . . . . . . . . . . . . . . . 49

Systems . . . . . . . . . . . . . . . . . . . . . . . . . . . 50

Standard System (Two T1 Outputs) 50

With Eight Additional E1 or

2.048 MHz Outputs . . . . . . . . . . . 51

TimeSource 3600

Engineering & Ordering

Chapter 2 (cont’d)

With Two E1 Synchronization

Insertion (ESCIU) Ports . . . . . . . . 51

With Four IRIG-B TOD Outputs . . . 52

Antennas . . . . . . . . . . . . . . . . . . . . . . . . . . 53

Roof Antenna . . . . . . . . . . . . . . . . . . . 53

Mechanical Window Antenna . . . . . . 53

Self-Adhesive Window Antenna . . . . 54

Wall Antenna . . . . . . . . . . . . . . . . . . . . 54

User-Supplied Tools and Materials . . . . . 55

For Roof Antenna Installation . . . . . . 55

For Mechanical Window Antenna

Installation . . . . . . . . . . . . . . . . . . . . 56

For Self-Adhesive Window Antenna

Installation . . . . . . . . . . . . . . . . . . . . 56

For Wall Antenna Installation . . . . . . 56

For Shelf Installation . . . . . . . . . . . . . . 57

Installation

Chapter 3

Outputs, Power, and Miscellaneous . 58

Unpacking . . . . . . . . . . . . . . . . . . . . . . . . . 60

Antenna . . . . . . . . . . . . . . . . . . . . . . . . . . . 61

Roof Antenna . . . . . . . . . . . . . . . . . . . 61

Mechanical Window Antenna . . . . . . 67

Self-Adhesive Window Antenna . . . . 70

Wall Antenna . . . . . . . . . . . . . . . . . . . . 73

Contents

Installation

Chapter 3 (cont’d)

Rack Mounting . . . . . . . . . . . . . . . . . . . . . 77

Output Module Installation . . . . . . . . . . . 78

Power and Signal Cabling . . . . . . . . . . . . 80

Frame Ground . . . . . . . . . . . . . . . . . . . 82

Power . . . . . . . . . . . . . . . . . . . . . . . . . . 84

GPS Antenna . . . . . . . . . . . . . . . . . . . . 85

10 MHz Output . . . . . . . . . . . . . . . . . 85

E1 or Analog Synchronization

Outputs . . . . . . . . . . . . . . . . . . . . . . 86

Expansion Bus . . . . . . . . . . . . . . . . . . . 87

1 PPS Output . . . . . . . . . . . . . . . . . . . 87

E1 or Analog Reference Inputs . . . . . 88

Module for Additional E1 or

Analog Outputs (990-72060-02 System Only) . . . 89

Module for IRIG-B TOD Outputs

(990-72060-05 System Only) . . . 90

Module for ESCIU Ports

(990-72060-04 System Only) . . . 91 Cutover Procedures for

Out-of-Service Equipment . . . 92

Cutover Procedures for

In-Service Equipment . . . . . . . . 94

Time of Day Output . . . . . . . . . . . . . 96

Ethernet . . . . . . . . . . . . . . . . . . . . . . . . 99

TimeSource 3600

Installation

Chapter 3 (cont’d)

Communication Port 1 . . . . . . . . . . . 100

Communication Port 2 . . . . . . . . . . . 101

Alarms . . . . . . . . . . . . . . . . . . . . . . . . . 102

Craft Port . . . . . . . . . . . . . . . . . . . . . . . 103

Power-Up . . . . . . . . . . . . . . . . . . . . . . . . . . 104

Factory-Set Values . . . . . . . . . . . . . . . . . . 118

TL1 Reference

Chapter 4

Conventions . . . . . . . . . . . . . . . . . . . . . . . 122

Command Format . . . . . . . . . . . . . . . . . . 124

Response Format . . . . . . . . . . . . . . . . . . . 125

Parameters . . . . . . . . . . . . . . . . . . . . . . . . 127

Autonomous Messages . . . . . . . . . . . . . . 131

Report Alarm . . . . . . . . . . . . . . . . . . . 132

Report Event . . . . . . . . . . . . . . . . . . . . 133

Tasks/Commands . . . . . . . . . . . . . . . . . . . 134

Commands . . . . . . . . . . . . . . . . . . . . . . . . 136

Activate User . . . . . . . . . . . . . . . . . . . . 137

Cancel User . . . . . . . . . . . . . . . . . . . . . 138

Copy Memory . . . . . . . . . . . . . . . . . . . 139

Delete Equipment . . . . . . . . . . . . . . . . 142

Delete User Security . . . . . . . . . . . . . 143

Edit Communication . . . . . . . . . . . . . . 144

Edit Date . . . . . . . . . . . . . . . . . . . . . . . 148

Contents

TL1 Reference

Chapter 4 (cont’d)

Edit Equipment . . . . . . . . . . . . . . . . . . 150

Enter Equipment . . . . . . . . . . . . . . . . . 158

Enter User Security . . . . . . . . . . . . . . . 160

Initialize Register . . . . . . . . . . . . . . . . . 161

Initialize System . . . . . . . . . . . . . . . . . . 162

Operate Alarm Cutoff All . . . . . . . . . 163

Retrieve Alarm All . . . . . . . . . . . . . . . 164

Retrieve Alarm Equipment . . . . . . . . 165

Retrieve Communication . . . . . . . . . . 167

Retrieve Condition All . . . . . . . . . . . . 170

Retrieve Condition Equipment . . . . . 171

Retrieve Equipment . . . . . . . . . . . . . . 173

Retrieve GPS Status . . . . . . . . . . . . . . 180

Retrieve Inventory . . . . . . . . . . . . . . . 182

Retrieve Performance Monitoring . . 184

Troubleshooting

Chapter 5

TimeSource 3600

Retrieve User Security . . . . . . . . . . . . 200

Set Source Identifier . . . . . . . . . . . . . . 201

Troubleshooting with Front Panel Items 204

Troubleshooting with Error Messages . . 209

Card Replacement . . . . . . . . . . . . . . . . . . 216

Repair and Return . . . . . . . . . . . . . . . . . . 218

Technical Assistance . . . . . . . . . . . . . . . . . 220

Troubleshooting

Chapter 5 (cont’d)

Sales . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 221

Manual Updates . . . . . . . . . . . . . . . . . . . . 222

Specifications

Chapter 6

Antenna . . . . . . . . . . . . . . . . . . . . . . . . 224

Roof Antenna . . . . . . . . . . . . . . . . . 224

Mechanical Window Antenna . . . 224

Wall Antenna . . . . . . . . . . . . . . . . . 225

Self-Adhesive Antenna . . . . . . . . . 225

Communication Ports . . . . . . . . . . . . 226

Port 1 . . . . . . . . . . . . . . . . . . . . . . . 226

Port 2 . . . . . . . . . . . . . . . . . . . . . . . 227

Craft Port . . . . . . . . . . . . . . . . . . . . 228

Ethernet Port . . . . . . . . . . . . . . . . . . . . 229

Time of Day Outputs . . . . . . . . . . . . . 230

Network Time Protocol (NTP),vt

Type 4, Format 2 Driver Format 230

Cisco Systems Format . . . . . . . . . . 231

IRIG-B TOD Outputs

(990-72060-05 System Only) . 232

E1 Inputs . . . . . . . . . . . . . . . . . . . . . . . 233

Analog 2.048 MHz Inputs . . . . . . . . . 234

1 PPS Output . . . . . . . . . . . . . . . . . . . 235

E1 Outputs . . . . . . . . . . . . . . . . . . . . . 236

Standard . . . . . . . . . . . . . . . . . . . . . 236

Contents

Specifications

Chapter 6 (cont’d)

Additional E1 Outputs

(990-72060-02 System Only) . 238

Analog 2.048 MHz Outputs . . . . . . . 240

Standard . . . . . . . . . . . . . . . . . . . . . 240

Additional Analog Outputs

(990-72060-02 System Only) . 241

10 MHz Output . . . . . . . . . . . . . . . . . 242

ESCIU Ports

(990-72060-04 System Only) . . . 243

Office Alarms . . . . . . . . . . . . . . . . . . . . 244

Connector Panel Contacts . . . . . . 244

Front Panel Lamps . . . . . . . . . . . . . 244

Front Panel Control . . . . . . . . . . . . 244

Power . . . . . . . . . . . . . . . . . . . . . . . . . . 245

Shelf Mechanical . . . . . . . . . . . . . . . . . 245

Shelf Environmental . . . . . . . . . . . . . . 246

Index

Figures

TimeSource 3600

1. Shelf . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

2. Roof Antenna . . . . . . . . . . . . . . . . . . . . 22

3. Mechanical Window Antenna . . . . . . 23

4. Self-Adhesive Window Antenna . . . . 24

5. Wall Antenna . . . . . . . . . . . . . . . . . . . . 25

Figures

(cont’d)

6. Block Diagram . . . . . . . . . . . . . . . . . . . 27

7. ESCIU Signals . . . . . . . . . . . . . . . . . . . . 32

8. Antenna Field of View . . . . . . . . . . . . . 39

9. Antenna Location Examples . . . . . . . . 40

10. Sample Rooftop Antenna Mount . . 42

11. Antenna Mask Angle . . . . . . . . . . . . . 46

12. Rack Mounting Options . . . . . . . . . . 49

13. Roof Antenna-to-Shelf Cabling . . . . 62

14. Mechanical Window Antenna-to-Shelf

Cabling . . . . . . . . . . . . . . . . . . . . . . . . 67

15. Attaching the Mechanical Window

Antenna . . . . . . . . . . . . . . . . . . . . . . . 69

16. Mechanical Window Antenna Pivot

Screw . . . . . . . . . . . . . . . . . . . . . . . . . 69

17. Self-Adhesive Window Antenna-to-Shelf

Cabling . . . . . . . . . . . . . . . . . . . . . . . . 70

18. Attaching the IF Converter . . . . . . . 72

19. Wall Antenna-to-Shelf Cabling . . . . . 73

20. Hole Spacing . . . . . . . . . . . . . . . . . . . . 75

21. Wall Antenna Mounting . . . . . . . . . . 76

22. Rack Mounting Options . . . . . . . . . . 77

23. Options I/O Connector . . . . . . . . . . 79

24. Connector Panel and Front Panel

Connectors . . . . . . . . . . . . . . . . . . . . 81

Contents

Figures

(cont’d)

25. Connector Panel Terminal Block

Connections . . . . . . . . . . . . . . . . . . . 82

26. E1 or Analog Output Wire-Wrap

Connections . . . . . . . . . . . . . . . . . . . 86

27. E1 or Analog Input Wire-Wrap

Connections . . . . . . . . . . . . . . . . . . . 88

28. Eight E1 or Analog Outputs

Connections . . . . . . . . . . . . . . . . . . . 89

29. IRIG-B TOD Output Connections . 90

30. Connector Layout of ESCIU Modules 91

31. ESCIU Cutover without Jacks

(Out-of-Service) . . . . . . . . . . . . . . . 93

32. ESCIU Cutover with Jacks

(In-Service) . . . . . . . . . . . . . . . . . . . . 95

33. RS-422–to–RS-232 TOD Converter

Mounting Plate . . . . . . . . . . . . . . . . . 97

34. RS-422–to–RS-232 TOD Converter

Connections . . . . . . . . . . . . . . . . . . . 98

35. Alarm Connections . . . . . . . . . . . . . . 102

36. Command Format . . . . . . . . . . . . . . . 124

37. Completed Response Format . . . . . 125

38. Deny Response Format . . . . . . . . . . 126

39. Controls and Indicators . . . . . . . . . . 205

40. Front of Shelf . . . . . . . . . . . . . . . . . . . 217

TimeSource 3600

Ta b l e s

A. Timing Source Characteristics . . . . . . 27

B. TOD Connector Pinouts . . . . . . . . . . 96

C. Converter DB-25 Connector Pinouts 98

D. Ethernet 10base-T RJ-45 Connector

Pinouts . . . . . . . . . . . . . . . . . . . . . . . . 99

E. COM1 Connector Pinouts . . . . . . . . . 100

F. COM2 Connector Pinouts . . . . . . . . . 101

G. Craft Terminal Connector Pinouts . . 103

H. Parameter Factor y Settings . . . . . . . . 118

I. Parameter Definitions . . . . . . . . . . . . . . 127

J. Commands for Tasks . . . . . . . . . . . . . . . 134

K. Front Panel Items . . . . . . . . . . . . . . . . . 206

L. Message Troubleshooting . . . . . . . . . . 209

Contents

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TimeSource 3600

Description

This chapter provides an overview of the global positioning system, and a physical and functional description.

Chapter

SSSSSSSSSSSS SSSSSSSSSS SSSSSSS

Overview

The TimeSource 3600 is a Primary Reference Source (PRS) that receives and processes signals from GPS satellites, and outputs Stratum 1 synchronization signals traceable to UTC. TimeSource 3600 applications include synchronization for central offices, wireless base stations, transmission nodes, and other cases where a primary reference source can improve the performance of a telecommunications network infrastructure.

The TimeSource 3600 is also ideal for installation in environments where receiving GPS signals is difficult. Examples of environments hostile to GPS signals include urban canyons which have a very limited view of the sky because of blockage from nearby buildings, and high interference zones where GPS signals are jammed by competing over-the-air signals.

The TimeSource 3600 creates timing outputs by ensembling signals from several sources. The sources include GPS signals, an onboard rubidium local oscillator, and optional E1 or analog. Timing outputs created from the ensemble are composed of the most stable and least noisy parts of each input. The performance of the E1 sources can be monitored and classified using standard measures. Synchronization outputs are delivered in a framed, allones, E1 format or 2.048 MHz analog signal, a 10 MHz signal, a 1 pps signal, and a choice of time of day (TOD) formats.

The TimeSource 3600 minimizes timing impairments, such as jitter and wander, that are created by network and transmission systems. The synchronization timing is traceable to the GPS, which provides the highest level of synchronization for telephony networks. The TimeSource 3600 with its GPS input is a standalone office PRS. With the optional inputs ensembled, holdover is extended if GPS signals are disrupted.

TimeSource 3600

SSSSSSSSSSSS SSSSSSSSSS SSSSSSS

Global Positioning System

The United States Government developed the GPS navigation system. It is a satellite-based, radio navigation aid designed to provide global, all-weather, precise navigation and timing capability to users 24 hours a day.

The satellites, circling the earth at approximately 20,197 km, are arranged in 6 orbits with 4 operational satellites in each orbit. Each satellite has an orbital period of approximately 12 hours. This configuration assures that a minimum of 4 satellites, and as many as 12, are in view anywhere in the world at all times.

The TimeSource 3600 tracks all satellites within its field of view. The performance of each tracked satellite is observed and compared to the others, and available for use in the timing solution. A satellite with unacceptable performance data is dropped from the timing solution.

GPS antennas must have line-of-sight access to the transmitting satellites. Any structure that interferes with, or blocks, the view of the satellites disrupts the reception of the signals, and can adversely impact the timing performance of a receiver.

The TimeSource 3600 bridges frequent GPS outage periods with BesTime algorithms, its ultra-stable Rubidium local oscillator and advanced holdover technology. The technology anticipates the outages and uses BesTime-generated predictor values to optimize the performance of timing without direct satellite input.

Description

SSSSSSSSSSSS SSSSSSSSSS SSSSSSS

Physical Description

The TimeSource 3600 consists of a shelf, plug-in card, antenna, cables, hardware, and software. Optional system configurations include eight additional E1 or analog outputs, two E1 synchronous clock insertion unit (ESCIU) ports, or four IRIG-B TOD timing outputs.

The shelf (Figure 1) can be mounted in a 48 cm rack or an ETSI

53.5 cm rack. Other than a communications connector on the front panel, all connectors are at the connector panel.

Four types of antennas are available:

• roof antenna for installation outdoors, usually on a roof

• mechanical antenna for installation indoors, mounted on a window sill or wall for reception through a window

• self-adhesive antenna for installation indoors, adhered directly to a window

• wall antenna for installation outdoors, through a hole in the wall

TimeSource 3600

SSSSSSSSSSSS SSSSSSSSSS SSSSSSS

Figure 1. Shelf

22 cm

43.8 cm

990-72060-01, -02, -05 Systems

8.2 cm

22 cm

43.8 cm

990-72060-04 Systems

Description

8.2 cm

SSSSSSSSSSSS SSSSSSSSSS SSSSSSS

Roof Antenna

The roof antenna (Figure 2) is encased in weather-resistant plastic housing for outdoor installation, usually on a roof. A single coaxial cable carries signals and power between the antenna and the shelf.

Figure 2. Roof Antenna

31.4 cm

4.4 cm

TimeSource 3600

SSSSSSSSSSSS SSSSSSSSSS SSSSSSS

Mechanical Window Antenna

The mechanical window antenna (Figure 3) may be attached to a window sill or wall, in any position that allows the antenna to be moved flush against the window. The antenna can be swung away from the window for window maintenance, and returned to its original position.

A single length of coaxial cable carries signals and power between the antenna assembly and the shelf.

Figure 3. Mechanical Window Antenna

Coaxial Cable

Mounting Assembly

IF Converter

Antenna

43 cm

to TimeSource 3600 Shelf

Coaxial Cable

(not included with

antenna assembly)

Description

SSSSSSSSSSSS SSSSSSSSSS SSSSSSS

Self-Adhesive Window Antenna

The self-adhesive window antenna assembly (Figure 4) consists of the antenna and two pieces of self-stick hook-and-loop fabric fasteners (Velcro brand or equivalent). The hook-and-loop fabric attaches directly to a window. Coaxial cables carry signals and power between the antenna and the IF converter, and between the IF converter and the shelf.

Figure 4. Self-Adhesive Window Antenna

GPS WINDOW

ANTENNA

TimeSource 3600

SSSSSSSSSSSS SSSSSSSSSS SSSSSSS

Wall Antenna

The wall antenna (Figure 5) is mounted on the outside of a building wall. The antenna attaches magnetically to the mounting bracket. The cable from the antenna is routed through a hole drilled in the wall. Coaxial cables carry signals and power between the antenna and the IF converter, and between the IF converter and the shelf.

Figure 5. Wall Antenna

7.5 cm

Antenna Mounting Bracket Antenna

Coaxial Cable

Description

SSSSSSSSSSSS SSSSSSSSSS SSSSSSS

Functional Description

Overview

Figure 6 shows the main functions of the TimeSource 3600. The center of the TimeSource 3600 is the BesTime Ensemble Timing Generator, which uses the BesTime algorithm to analyze the phase and frequency relationships, individually and collectively, of the timing sources. Each type of timing source has a particular characteristic that gives it an advantage over other sources, as listed in Table A.

The BesTime algorithm uses the best characteristic of each source to produce an output signal with greater overall accuracy and stability than any single source. The contribution of a source is based on its deviation from the weighted average of all the sources. The more accurate a source, the more weight it has in the final output. Every source is under constant evaluation and its contribution subject to periodic adjustment. The output is essentially the best performance of the best source.

TimeSource 3600

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Figure 6. Block Diagram

arm

Interface

Alarms

Clock input & dc

power to antenna

Antenna

input

Optional source s

E1 Span

Input #1

E1 Span

Input #2

–48 V A –48 V B

Interface

Local

Oscillator

Clock

Extractor

Clock

Extractor

Power

Supply

Power to shelf

Micro-

processor

BesTime

Ensemble

Timing

Generator

COM ports Ethernet port Status lamps

E1/analog output A

E1/analog output B

1 pps output TOD output 10 MHz output

8 E1/analog outputs

4 IRIG-B TOD outputs

2 ESCIU ports

Optional ports

Table A. Timing Source Characteristics

Source Characteristic

Local Oscillator Short term stability

E1 Line Intermediate term stability

GPS Signal Long term stability

Description

SSSSSSSSSSSS SSSSSSSSSS SSSSSSS

Antenna

The antenna types include a roof antenna, mechanical window antenna, self-adhesive window antenna, or wall antenna. All antennas include a GPS receiver, amplifier, and intermediatefrequency (IF) downconverter.

The GPS Receiver extracts a clock signal from the GPS satellite signals. The receiver can process the signals from all satellites in view, while simultaneously using the Earth location of the receiver and other factors to determine an accurate clock signal.

The downconverter converts the L1-band GPS signal to IF for long-distance transport on the coaxial antenna cable. The antenna cable provides current from the shelf to the antenna, and transports GPS satellite IF signals from the antenna to the shelf.

IF Interface

An IF interface accepts the signals from the antenna/IF converter, and provides the clock information to the BesTime Ensemble Timing Generator.

GPS Receiver

The GPS Receiver continuously tracks up to eight satellites, using both carrier and code lock. The recovered pseudo-range measurement data is processed to determine precise time and frequency state estimates for the local oscillator. The receiver software is optimized to track and update state estimates, when as few as one satellite is in view.

Local Oscillator

A rubidium oscillator, based on a digitally controlled servo-loop, provides an ultra-stable local oscillator signal, which is sent to the BesTime Ensemble Timing Generator.

TimeSource 3600

SSSSSSSSSSSS SSSSSSSSSS SSSSSSS

Clock Extractors

A clock extractor circuit extracts a timing signal from each external reference source. (External sources, other than the GPS antenna, are optional.) The extracted timing signal is sent to the BesTime Ensemble Timing Generator.

Power Supply

A power converter filters and converts –48 volts dc power supplied to the shelf into the voltages required by the circuitry.

BesTime Ensemble Timing Generator

Clock signals from the GPS antenna (via the IF interface), local oscillator, and two optional E1 span lines are used as sources by the BesTime algorithms in the BesTime Ensemble Timing Generator. The signals are analyzed for MDEV, TDEV, and other phase and frequency characteristics.

The BesTime Ensemble Timing Generator uses mathematical models to analyze each clock. The ensemble algorithms use the comparisons and analyses to generate a highly stable timing signal, which uses the best qualities of all inputs.

E1 or Analog Outputs

The BesTime Ensemble Timing Generator provides the timing for the E1 or analog (2.048 MHz) timing signal available at the E1 OUT A and B connectors. E1 is provided in a framed, all-ones format, which can be set to CAS, CAS4, CCS, or CCS4 framing.

2.048 MHz is provided in accordance with G.703/10.

Description

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Eight Additional E1 or Analog Outputs (990-72060-02 Systems Only)

This option provides a module for eight additional E1 or analog (2.048 MHz) outputs. The module mounts in the OP TIONS I/O mountings on the connector panel. These outputs function the same as the standard E1 outputs.

TOD Output

The BesTime Ensemble Timing Generator provides the timing for the TOD timing signal available at the RJ-45 connector, which provides time code to devices compatible with NTP Type 4 or Cisco format.

IRIG-B TOD Outputs (990-72060-05 Systems Only)

This option provides a module for four additional TOD outputs in IRIG-B format. The module mounts in the OPTIONS I/O mountings on the connector panel.

The BesTime Ensemble Timing Generator provides the timing for the TOD timing signal, which provides timing code to devices compatible with IRIG-B.

1 PPS Output

The BesTime Ensemble Timing Generator provides the timing for the 1 pulse-per-second timing signal available at the 1 PPS connector, which can be used for application-specific requirements. This signal is not squelched during an alarm.

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10 MHz Output

The BesTime Ensemble Timing Generator provides timing for the 10 MHz timing signal available at the 10 MHZ connector, which can be used for local cellular frequency or testing purposes. This signal is not squelched during an alarm.

Tw o E S C I U Po r t s (990-72060-04 Systems Only)

This option provides a module for two E1 ports. The module mounts in the OPTIONS I/O mountings on the connector panel. E1 traffic-carrying signals are synchronized using the Bestime ensemble timing generator. Jitter and wander are also removed before sending the E1 signals to network elements.

If an alarm condition or power failure occurs, relays allow the E1 signals to bypass the system. (See Figure 7.)

Description

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Figure 7. ESCIU Signals

ESCIU

Pass-through in Return Direction

Relay Bypass Path

Datastream

Synchronizer

BesTime Ensemble

Timing Generator

Synchronizing signal

Alarm Interface

The microprocessor delivers alarms to normally open dry-contact type connections. Alarms are also indicated by the front-panel status lamps.

Communication Ports

Three serial communication ports carry TL1 commands, responses, and autonomous messages between the TimeSource 3600 and an external terminal.

Ethernet

The TimeSource 3600 has six Ethernet ports to carry TL1 commands, responses, and autonomous messages between the TimeSource 3600 and an external terminal, or an Element Manager, or both. The user can configure the IP address, subnet mask, and gateway address for the Ethernet ports.

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Four ports (5001, 5002, 5003, and 5004) are configured to act as though a serial-port communication terminal were connected to them. These ports communicate TL1 commands, responses and autonomous messages.

Two additional ports communicate with Element Managers, which may have NMS, OSMF, or similar software. An Element Manager establishes a connection with one port (5551) for TL1 commands and responses. Another port (5550) establishes a connection to an Element Manager, sends autonomous messages, and closes the connection when finished.

Description

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TimeSource 3600

Engineering & Ordering

This chapter provides information to assist in planning the installation and ordering a system appropriate for a specific site.

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Antenna Guidelines

Perform a site survey as described in Procedure A before ordering the system. Use the guidelines and considerations in the Roof Antenna Location and Cabling Guidelines section and the Shelf Considerations section.

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Procedure A. Site Survey

Step Action

Determine the shelf location.

2 Determine the best location for mounting the antenna (less than 330 m of cable

from the shelf). Use the guidelines and considerations in the Roof Antenna Location and Cabling Guidelines section.

3 If a roof-mounted antenna is installed, determine the location of the grounding point

for the lightning suppressor, then determine the location of the lightning suppressor. The cable length between the lightning suppressor and the grounding point must be less than 4.6 m. If the grounding point is inside the building, the cable length between the grounding point and the cable entry must be less than 15 m. Valid lightning suppressor grounding points are:

• Valid ring ground system (usually for roof-mounted lightning suppressors)

• Structural steel of building (for interior-mounted or exterior-mounted lightning suppressors, attach with a cad weld)

• Central Office ground plate (usually for interior-mounted lightning suppressors)

4 If a roof-mounted antenna is installed, two lengths of cable are required. Plan the

cable route and measure the length of cable required between the antenna and the lightning suppressor, and between the lightning suppressor and the shelf.

5 If a window or wall-mounted antenna is installed, plan the cable route and measure

the length of cable required between the antenna and the shelf.

6 Determine the two separate –48 V power sources for the shelf. If only one –48 V

power source is available, it must be cabled to both TimeSource 3600 power inputs.

End of Procedure

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Roof Antenna Location and Cabling Guidelines

DANGER:

electrical or physical hazard to work persons or equipment. Avoid proximity to all high-voltage sources. Mount in an easily maintainable location.

The ideal roof antenna location provides a clear, unobstructed view of the sky from the zenith to the horizon line, and 360 degrees around the horizon.

A compromise often must be made between location and satellite field of view. With a smaller the field of view, the TimeSource 3600 can use fewer satellites in the solution for GPS derived time. The TimeSource 3600 will operate with an average of one satellite in view for 40% of the time in a day.

Signals closer to the horizon are often subject to multipath effects, which degrade the timing solution. The TimeSource 3600 can be set to ignore, or mask, all signals from the horizon up to a chosen angle of elevation (mask angle). (See Figure 8.)

Do not select an antenna location that could be an

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Figure 8. Antenna Field of View

Antenna position

Antenna

field of view

10°

Mask angle*

Horizon

Equator

* An angle of 10° masks objects up to about 1 m above the

horizon at 6 m from the antenna (illustration at right.)

Due to the geometry of the GPS satellite orbits, more satellites are visible in the direction of the equator than the poles. If possible, place the antenna so that the antenna has a clear view toward the equator (toward the south in the northern hemisphere, or toward the north in the southern hemisphere). Up to 60 degrees of arc, centered at the pole, may be blocked with little effect in the temperate latitudes. This note is less applicable in latitudes nearer the equator.

Obstructions

toward the pole

if possible

10° Mask angle*

10°

6 m

Pole

1 m

The total of obstructions above the mask angle should not obscure more than 25 percent of the total field of view (90 degrees of azimuth) (Figure 9).

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Figure 9. Antenna Location Examples

Antenna tower

antenna

location

(Note 1)

Antenna

tower

Location A Location B

Notes:

1. Place the antenna high enough on the tower that obstructions are below the mask angle; mount the antenna more than 1 meter away from the tower, and far below the interference of the antennas at the top of the tower. Tower mounting is the least desirable location because of the potential for severe multipath, and difficulty in troubleshooting and maintenance.

2. Place the antenna high enough that the roof structure and tree are below the mask angle, and the water tower does not block a large portion of the sky.

Water

tower

Building antenna location (Note 2)

Tree

Roof

structure

No single obstruction should block a large portion (45 degrees of azimuth) of the view.

The most important obstructions are within 400 meters of the antenna. Obstructions may include, but are not limited to, towers, buildings, other construction, trees, and high-voltage power lines.

Attempt to avoid locating the antenna within 30 degrees azimuth of the transmission direction of any transmitting antenna in the area, even if the transmitting antenna operates at a different frequency. A transmitting antenna may cause the GPS antenna to become overloaded and reduce its reception capabilities.

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The minimum horizontal distance from other receiving antennas is 1 meter.

To reduce multipath signal distortions, the minimum horizontal distance from vertical reflective structures (e.g., heating ducts, equipment housings, etc.) is twice the height of the structure, and no less than 3 meters (Figure 10).

Do not locate the antenna underneath high power lines. If this cannot be avoided, ensure the antenna is placed at least twice as far from the power line as the power line is high (to avoid danger to personnel and multipath effects).

Cables must be run as straight as possible. All cables should be routed in accordance with local company practices.

Note:

routed in accordance with local company practices.

Observe the following guidelines during the placement and installation of the cables:

Warning:

Keep all impedances as low as possible. All cables should be

• Route cables as straight as possible (bends in the cable increase impedance at lightning frequencies), in accordance with local company practices.

• Any opening where conduit enters the building must be waterproofed per local company practices.

• Treat all exposed connections with an electrically conductive anti-corrosion compound (Kopr-Shield or equivalent).

Avoid small-radius turns and unnecessary turns.

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Figure 10. Sample Rooftop Antenna Mount

At or above the

level of the

Reflective

surface

reflective surface

Cable

conduit

2.4 m

Rooftop

Heating

Ducts

(twice the 2.4 m height)

4.8 m

(3 m minimum)

Cable entry

into building

Note: This is an example only. Not all parts are available from Symmetricom.

Antenna Mounting Bracket

Mounting Pipe

Pipe clamped to wall

Building Wall

Roof Antenna Earth Ground Location Guidelines

The roof ring ground system, a Central Office grounding plate, and building structural steel are examples of valid earth ground points. If the mounting plate cannot be bolted to a valid earth ground, or if the mounting plate is to be installed in a nonmetallic junction box, bolt the mounting plate to a point within 4.6 meters of the valid earth ground.

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Roof Antenna Cable Choices

The antenna assembly uses the same coaxial cable for power and antenna signals. The length of cable is determined by circumstances of the installation and site.

Symmetricom offers RG-59/U plenum-rated coaxial cable (0.812 mm [20 AWG], 75 ohm coaxial) with male TNC connectors attached, in the following lengths:

• 3 m cable (060-72010-01)

• 6 m cable (060-72010-02)

• 15 m cable (060-72010-05)

• 30 m cable (060-72010-10)

• 61 m cable (060-72010-20)

• 91 m cable (060-72010-30)

• 152 m cable (060-72010-50)

• 182 m cable (060-72010-60)

• 243 m cable (060-72010-80)

• 305 m cable (060-72010-99)

Two cables are required: one to connect the antenna to the lightning suppressor, and another to connect the lightning suppressor to the TimeSource 3600 Shelf.

Optionally, one length of coaxial cable may be ordered, which must be cut and prepared with end-connectors at the point where the suppressor is located.

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The following items, which must be ordered separately, are available for this type of installation:

• TNC connector kit (093-72010-98) includes:

- TNC connectors for RG-59/U cables (8)

- Rubber boots (8)

- TNC adapter connectors (2)

• TNC crimp tool (154-00023-01)

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Window and Wall Antenna Location Guidelines

When selecting a window or wall in which to install the antenna, select the window or wall which has the maximum unobstructed view of the sky. Do not select a window or wall which has the view of the sky obstructed by trees, buildings, or towers. The smaller the field of view, the fewer the number of satellites that can be used in the timing solution for GPS derived time. The consequence of this is that the timing generator may experience holdover more often and may eventually go into alarm.

Due to the geometry of the GPS satellite orbits, more satellites are visible in the direction of the equator than the poles. If possible, select a window or wall which has a clear view toward the equator (toward the south in the northern hemisphere, or toward the north in the southern hemisphere). This guideline is less applicable in latitudes nearer the equator and more important nearer the poles.

Certain parts of the sky are blocked from view. These obstructions usually exist from the horizon line and up, for example, a building or mountain. The processor inside the GPS receiver possesses every piece of the sky, whether it is blocked or not. If unproductive parts of the sky are masked from the processor’s view, the processing time is reduced, and the timing solution can be achieved more quickly.

Note:

view of the sky begins is called a mask angle. The mask angle typically should not exceed 10 degrees (if the mask angle is set too high, too little of the sky is available to the receiver). Determine the mask angle for the selected antenna location (Figure 11) and make a note of it. The mask angle, in degrees, will be entered during the initial setup.

A band of the sky from the horizon up to a point where a

Engineering & Ordering

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Figure 11. Antenna Mask Angle

TimeSource 3600

Antenna

1 m

6 m

Note: TimeSource 3600 does not detect satellites in the masked area.

*An angle of 10° masks objects up to about 1 m above the horizon at 6 m from the antenna.

10° mask angle*

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Window and Wall Antenna Cable Choices

A window or wall antenna includes an attached coaxial cable terminating in a male SMA connector.

A separate cable is required to connect the IF converter to the TimeSource 3600 shelf. Two types of plenum-rated cable are available.

The cables with longer length capabilities (060-72010-xx) are RG-59/U (0.812 mm [20 AWG], 75 ohm coaxial) with male TNC connectors attached to each end. Assembled cables are available in the following lengths:

• 3 m cable (060-72010-01)

• 6 m cable (060-72010-02)

• 15 m cable (060-72010-05)

• 30 m cable (060-72010-10)

• 61 m cable (060-72010-20)

• 91 m cable (060-72010-30)

• 152 m cable (060-72010-50)

• 182 m cable (060-72010-60)

• 243 m cable (060-72010-80)

• 305 m cable (060-72010-99)

The more flexible cables (060-72050-xx) are Mini RG-59/U (0.812 mm [20 AWG], 75 ohm coaxial) with male TNC connectors attached to each end. Assembled cables are available in the following lengths:

• 15 m (060-72050-05)

• 30 m (060-72050-10)

• 61 m (060-72050-20)

• 152 m cable (060-72010-50)

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IRIG-B TOD (990-72060-05 System Only)

If using the IRIG-B TOD outputs (990-72060-05 TimeSource 3600 System), right-angle BNC connectors are provided to prevent small radius turns in the IRIG-B TOD cables. The right-angle BNC connectors may be attached to the IRIG-B BNC adapter (also provided) BNC connectors, to direct the cables from the shelf as desired.

For each IRIG-B TOD output, a user-supplied cable with BNC connectors on each end is installed between the adapter and the network elements requiring IRIG-B TOD timing.

RJ-422–to–RS-232 TOD Converter

If using time-of-day (TOD), and the device receiving the time code accepts an RS-232 signal instead of an RS-422 signal (for example, a Cisco router), an RJ-422–to–RJ-232 TOD Converter Kit is required (ordered separately, part number 093-72000-98).

The RJ-422–to–RJ-232 TOD Converter Kit consists of a mounting plate with a female RJ-45 connector, a female DB-25 connector, a TOD converter, and two screws.

Install the converter anywhere (for example, on unused space on a rack) within 305 cable meters of the TimeSource 3600 shelf, and within 15 cable meters of the device receiving the time code.

The user must supply two cables. One cable is a Category 5 fourpair RS-422 cable, 305 meter maximum, with RJ-45 connectors on each end. Route this cable between the TimeSource 3600 Shelf and the converter.

The other cable is an RS-232 data communications cable, 15 meters maximum, with a 25-pin male D-type connector and another connector determined by the device receiving the time code. Route this cable between the converter and the device receiving the time code.

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Shelf Considerations

The TimeSource 3600 Shelf can be mounted in an ETSI 53.5 cm rack or a 48 cm rack. The shelf is shipped with supplied mounting ears positioned for flush mounting on an ETSI 53.5 cm rack. Attach the mounting ears, as shown in Figure 12, for flush mounting or 12.7 cm offset mounting. Attach the long side of the mounting ear to the shelf for an ETSI 53.5 cm rack, and attach the short side of a mounting ear to the shelf for a 48 cm rack. Mount the shelf in the rack according to standard company practices.

Figure 12. Rack Mounting Options

Rack rails

Rear of rack

Top of shelf

A. ETSI – 53.5 cm rack

Mounting ears

Rear of rack

Top of shelf Top of shelf

Rack rails Mounting ears

B. Flush mounting – 48 cm rack

Mounting ears

Rack rails

Rear of rack

Top of shelf Top of shelf

C. 12.7 cm offset – 48 cm rack

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Systems

The TimeSource 3600 Systems available are listed below. The antenna must be ordered separately.

Standard System (Two E1 Outputs)

This system (990-72060-01) includes:

• TimeSource 3100 Shelf (090-72000-11)

• TimeSource 3600 card (090-72060-01)

• Hardware kit (093-72060-87)

• System software compact disc (CD) (992-72060-xx) Version

1.04.02 or higher

• TimeScan Craft software compact disc (CD) (992-46750-xx) Version 7.0.1 or higher

• TimeScan Craft connection key (020-46700-001)

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With Eight Additional E1 or 2.048 MHz Outputs

This system (990-72060-02) includes:

• TimeSource 3100 Shelf (090-72000-11)

• TimeSource 3600 card with additional E1 or 2.048 MHz outputs (090-72060-02)

• Hardware kit (093-72060-87)

• System software compact disc (CD) (992-72060-xx) Version

1.04.02 or higher

• TimeScan Craft software compact disc (CD) (992-46750-xx) Version 7.0.1 or higher

• TimeScan Craft connection key (020-46700-001)

With Two E1 Synchronization Insertion (ESCIU) Ports

This system (990-72060-04) includes:

• TimeSource 3100 Shelf (090-72000-11)

• TimeSource 3600 card with ESCIU ports (090-72060-04)

• Hardware kit (093-72060-87)

• System software compact disc (CD) (992-72060-xx) Version

1.04.02 or higher

• TimeScan Craft software compact disc (CD) (992-46750-xx) Version 7.0.1 or higher

• TimeScan Craft connection key (020-46700-001)

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With Four IRIG-B TOD Outputs

This system (990-72060-05) includes:

• TimeSource 3100 Shelf (090-72000-11)

• TimeSource 3600 card with IRIG-B TOD outputs (090-72060-

05)

• Hardware kit (093-72060-87)

• System software compact disc (CD) (992-72060-xx) Version

1.04.02 or higher

• TimeScan Craft software compact disc (CD) (992-46750-xx) Version 7.0.1 or higher

• TimeScan Craft connection key (020-46700-001)

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Antennas

The antennas available are listed below. A TimeSource 3600 System must be ordered separately.

Roof Antenna

This antenna kit (990-72050-96) includes:

• IF antenna assembly (090-72010-97)

• Rooftop antenna installation kit (093-72050-96) includes:

- Antenna cable bracket kit (093-00001-01)

- Mounting bracket for surge suppressor (070-00300-02)

- Surge suppressor (143-00018-01)

- Miscellaneous installation parts

Mechanical Window Antenna

This antenna kit (990-72050-97) comes as a fully assembled antenna with the following major components:

• Antenna, with cable and SMA connector attached (09072050-90)

• IF converter (090-72050-97)

• Mechanical chassis (074-72050-97)

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Self-Adhesive Window Antenna

This antenna kit (990-72050-98) includes:

• Antenna (090-72010-87)

• IF converter (090-72050-97)

• Self-adhesive window antenna installation kit (093-72050-98) includes:

- RG316 cable, 3 m (060-00062-01)

- Cable tie mounts (128-00302-02) and cable ties (128-00500-05)

Wall Antenna

This antenna kit (990-72050-99) includes:

• IF converter (090-72050-97)

• Wall antenna kit (093-72050-99) includes:

- Antenna, with 5.8 m of cable and SMA connector attached (112-00013-01)

- Antenna mounting bracket (070-00413-01)

- Cable tie mounts (128-00302-02) and cable ties (128-00500-05)

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User-Supplied Tools and Materials

Ensure that the user-supplied tools and materials listed below are on hand for installation, as applicable.

For Roof Antenna Installation

• 2.5 cm diameter galvanized metal pipe, used as a mast to mount the antenna. Mast should be long enough to position the antenna above any metal object on the roof

• Screws to attach the lightning suppressor mounting plate

• Plumb line or bubble level

• Nonmetallic junction box for lightning suppressor (optional if lightning suppressor mounted indoors)

• 2.5 cm diameter PVC pipe as conduit for outdoor cables

• PVC fittings appropriate to the installation and cable route

• Appropriate tools and materials for cutting, shaping, and connecting PVC pipe

• 4.115 mm (6 AWG) ground wire

• Spade lugs for 4.115 mm (6 AWG) ground wire

• Crimp tool for 4.115 mm (6 AWG) spade lugs

• Hardware to attach the ground wire to a valid earth ground

• Fire-stopping material to seal conduit hole in roof or wall

• Electrically conductive antioxidant compound (Kopr -Shield or equivalent) to coat exposed connections to prevent oxidation

• Tool to cut cable, if installation requires custom lengths of cable

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For Mechanical Window Antenna Installation

• Drill with bit of appropriate size and type to make pilot holes for the mounting screws

• 2 screws of appropriate size and type to attach the foot of the mechanical chassis to a window sill or wall near a window.

• Screwdriver

• Cable ties or other method of securing cable

• GPS handheld receiver, personal computer with GPS location software, or other method of determining latitude, longitude, and altitude

For Self-Adhesive Window Antenna Installation

• Drill with bit of appropriate size and type to make pilot holes for the mounting screws

• 4 screws of appropriate size and type to attach the IF converter to a wall or other mounting surface.

• Screwdriver

• GPS handheld receiver, personal computer with GPS location software, or other method of determining latitude, longitude, and altitude

For Wall Antenna Installation

• Ladder, or safe method of reaching the antenna location on the exterior wall

• Drill with bits of appropriate size and type to make pilot holes for the antenna mounting bracket screws, and to make a hole through the wall for the antenna cable

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• 2 screws of appropriate size and type to attach the antenna mounting bracket to an exterior wall.

• Screwdriver

• Electrically conductive antioxidant compound (Kopr-Shield or equivalent) to coat exposed connections to prevent oxidation

• Fire stopping material to seal the hole in the wall

• GPS handheld receiver, personal computer with GPS location software, or other method of determining latitude, longitude, and altitude

For Shelf Installation

• A Phillips-head screwdriver for installing the TimeSource 3600 Shelf in a rack

• Four screws to mount the shelf in a rack

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Outputs, Power, and Miscellaneous

• RG-58 coaxial cable for 1 PPS, 10 MHZ outputs

• Ethernet 10BaseT cable for Ethernet port

• Category 5 four-pair RS-422 cable, with RJ-45 connector for the TOD output, RS-422–to–RS-232 TOD converter

• RS-232 cable with DB-25 connector for the RS-422–to– RS-232 TOD converter

• RS-232 cable with DB-9 connector for COM2 port

• 4.115 mm (6 AWG) ground wire

• 1.47 mm (16 AWG) green insulated ground wire

• 1.47 mm (16 AWG) red insulated wire

• 1.47 mm (16 AWG) black insulated wire

TimeSource 3600

Installation

This chapter is the sequential order of procedures for installation and power-up.

Chapter

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Unpacking

Use the procedures in the order they appear in this chapter to install the TimeSource 3600. If any difficulties are encountered during the installation process, contact Symmetricom’s Customer Technical Assistance Center (CTAC). Refer to the Technical Assistance section of the Troubleshooting chapter for telephone numbers.

CTAC includes Product Technical Support for technical information, and Customer Service for information about an order, RMAs, and other information.

Warning:

procedures regarding electrostatic discharge (ESD), including:

•Use grounded wrist straps connected to equipment frame

•Store cards only in antistatic packaging provided by the

Note:

packed in the original packing material. Contact Customer Service if additional packaging is needed.

Unpack equipment carefully; check for completeness against the purchase order. Notify Symmetricom if items are missing.

Inspect equipment for shipping damage, including bent or loose hardware, and broken connectors.

If equipment was damaged in transit, contact Customer Service to request an RMA, and notify the carrier.

When handling electronic equipment, use local office

ground when handling cards.

factory.

Save packing material. All equipment returned must be

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Antenna

Roof Antenna

Installation procedures are to follow local company procedures and the Installation Job Specification.

Prior to installing the antenna, the site, antenna location, lightning suppressor location, lightning suppressor grounding point, cable route, and all other details should have been planned.

To install the antenna, refer to Figure 13 and perform Procedure B. Ensure all user -supplied materials are available.

Warning:

from electrical devices or cabling that may induce arcing.

Notes:

1. Recommended grounding points:

a. Valid roof ring ground system.

b. Cad weld to building structural steel.

c. Central office ground plate within 15 m of antenna cable

2. Order two cables or a single cable run can be made from the antenna to the TimeSource Shelf. The cable can then be cut at the lightning suppressor location, and TNC connectors attached to the cut ends of the cable. The “xx” in the part number indicates the cable length.

Ensure that the lightning suppressor is placed away

entrance into building.

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Figure 13. Roof Antenna-to-Shelf Cabling

Antenna

090-72010-97

Antenna Mounting

Hardware

(070-00377-01)

RG-59/U Cable

(060-72010-xx)

(See Note 2)

Lightning Suppressor

(143-00018-01)

and Mounting Bracket

(070-00300-02)

Valid earth ground

(See Note 1)

RG-59/U Cable

(060-72010-xx)

(See Note 2)

TNC Connector

(on shelf)

TNC Connector (Attached to cable)

TimeSource 3600 Shelf

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Procedure B. Roof Antenna Mounting and Cable Connection

Step Procedure

1 Attach the antenna mounting bracket to a pipe (2.5 cm diameter) or a wood post.

• If mounting the bracket to a pipe, slide the two V-bolts over the pipe, and through the mounting bracket slots; then place the provided four washers and four nuts over the V-bolts, against the mounting bracket. Leave the V-bolts loose enough to allow for final adjustments.

Mounting Bracket

Washers (4)

Nuts (4)

Pipe

• If mounting the bracket to a wood post, use the provided two self-tapping screws in two diagonally positioned mounting bracket slots, and attach to the post.

Screws (2)

V-Bolts (2)

Mounting Bracket

Post

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Procedure B. Roof Antenna Mounting and Cable Connection (cont’d)

Step Procedure

2 Slide the antenna bolts through the holes in the mounting bracket, then attach the

antenna to the bracket, using the provided three nuts and three lockwashers.

Antenna

(±5° of vertical)

090-72010-97

Antenna Bolts (3)

Lock washers (3)

Mounting

Bracket

Nuts (3)

3 Using a plumb line or bubble level, ensure the antenna is within 5° of vertical

(perpendicular to the horizon), and tighten the mounting bracket bolts.

4 Bolt the lightning suppressor mounting plate to a flange that is attached to a valid

earth ground. The roof ring ground system, a Central Office grounding plate, and building structural steel are examples of valid earth ground points. If the mounting plate cannot be bolted to a valid earth ground, bolt the mounting plate to a point within 4.6 m of the chosen valid earth ground. If the mounting plate is to be installed in a nonmetallic junction box, perform the installation, and bolt the assembly near the chosen valid earth ground.

TimeSource 3600

SSSSSSSSSSSS SSSSSSSSSS SSSSSSS

Procedure B. Roof Antenna Mounting and Cable Connection (cont’d)

Step Procedure

5 Slide the longer bolt of the lightning suppressor through the D-hole, and attach with a

nut and a washer (provided).

KEPS nut (2)

4.115 mm (6 AWG)

ground wire

D-hole

Nut

Washer

Lightningsuppressor

Cable connector (2)

6 Install 2.5 cm nonmetallic conduit from the antenna to the lightning suppressor, and

from the lightning suppressor to the cable entrance into the building.

7 Install a user-supplied bracket, preferably non-metallic, to support the vertical section

of conduit to the antenna.

8 Connect a cable to the antenna, route the cable through the conduit, and connect

the cable to the lightning suppressor.

9 Connect a cable to the lightning suppressor, route the cable through the conduit into

the building, and route the cable through the building to the TimeSource 3600 Shelf location.

10 If the lightning suppressor was not mounted directly to a valid earth ground, crimp a

length of 4.115 mm (6 AWG) ground cable to the two-hole terminal, slide the terminal over two of the three threaded posts on the lightning suppressor mounting plate, and attach the terminal to the mounting plate with two KEPS nuts. Use the two posts that allow the least bending of the 4.115 mm (6 AWG) ground cable.

Mounting plate

Hole for mounting bolt (2)

Threaded posts (3)

(use any 2)

Installation

SSSSSSSSSSSS SSSSSSSSSS SSSSSSS

Procedure B. Roof Antenna Mounting and Cable Connection (cont’d)

Step Procedure

11 Attach the other end of the cable to a valid earth ground.

12 Install fire-stopping material in all holes opened in the roof and/or walls during this

procedure.

13 Check all connections for tightness to prevent arcing and intermittent operation.

14 Coat all exposed connectors with an electrically conductive antioxidant compound

(e.g., Kopr-Shield spray).

End of Procedure

TimeSource 3600

SSSSSSSSSSSS SSSSSSSSSS SSSSSSS

Mechanical Window Antenna

Installation procedures are to follow local company procedures and the Installation Job Specification.

Prior to installing the antenna, the site, antenna location, cable route, and all other details should have been planned.

For best results, choose a window facing the equator (facing south in the northern hemisphere, facing north in the southern hemisphere), and with the fewest obstructions of the sky.

To install the antenna, refer to Figure 14 and perform Procedure C.

Figure 14. Mechanical Window Antenna-to-Shelf Cabling

Components of

990-72050-97

antenna

assembly

(Attached to cable, and on shelf)

Antenna-to-IF cable

TNC Connector

(on IF converter)

TNC Connector

(Attached to cable)

TNC Connector

Antenna

IF Converter

Antenna Assembly 990-72050-97

TimeSource 3600 Shelf

IF-to-shelf cable RG-59/U Cable

060-72010-xx (3 m to 305 m) or

Mini RG-59 Cable 060-72050-xx (15 m to 152 m)

Installation

SSSSSSSSSSSS SSSSSSSSSS SSSSSSS

Procedure C. Mechanical Window Antenna Mounting and Cable Connection

Step Procedure

Prerequisite: Observe all guidelines, considerations, Dangers, Warnings, Cautions, and Notes in the Engineering and Ordering chapter.

Symmetricom Parts

• Mechanical Window Antenna (990-72050-97)

• A length of RG-59/U plenum-rated coaxial cable (060-72010-xx), or

• A length of Mini RG-59/U plenum-rated coaxial cable (060-72050-xx)

User-Supplied Materials: For Mechanical Window Antenna Installation

• Drill with bit of appropriate size and type to make pilot holes for the mounting screws

• 2 screws of appropriate size and type to attach the foot of the mechanical chassis to a window sill or wall near a window.

• Screwdriver

• Cable ties or other method of securing cable

• GPS handheld receiver, personal computer with GPS location software, or other method of determining latitude, longitude, and altitude

1 At the window chosen in Chapter 2, Engineering and Ordering, attach the base of the

mechanical window antenna to the chosen location (sill, wall, etc.) using user-supplied screws (Figure 15).

2 Use the pivots on the mechanical window antenna to place the antenna section flat

against the window.

3 Tighten the pivot screws to secure the antenna (Figure 16).

4 Connect the antenna cable to the IF downconverter on the mechanical window

antenna assembly and route the cable to the TimeSource 3600 Shelf location.

5 Secure the cable using local company procedures.

6 Check all connections for tightness to prevent intermittent operation.

End of Procedure

TimeSource 3600

SSSSSSSSSSSS SSSSSSSSSS SSSSSSS

Figure 15. Attaching the Mechanical Window Antenna

Use 2 user-supplied

screws to attach to wall

or window sill

Figure 16. Mechanical Window Antenna Pivot Screws

Place the antenna against the window by moving the chassis on

these pivots.

Tighten these pivot screws to lock antenna posit ion.

Installation

SSSSSSSSSSSS SSSSSSSSSS SSSSSSS

Self-Adhesive Window Antenna

Prior to installing the antenna, the site, antenna location, cable route, and all other details should have been planned.

Installation procedures are to follow local company procedures and the Installation Job Specification.

For best results, choose a window facing the equator (facing south in the northern hemisphere, facing north in the southern hemisphere), and with the fewest obstructions of the sky.

To install the antenna, refer to Figure 17 and perform Procedure D.

Figure 17. Self-Adhesive Window Antenna-to-Shelf Cabling

Antenna

090-72010-87

Antenna-to-IF cable (10 ft)

060-00062-01

SMA connector

(Attached to cable,

and on IF converter)

IF converter

090-72050-97

and Mounting Kit

TNC connector

(Attached to cable,

and on IF converter)

TNC Connector

(Attached to cable, and on shelf)

Antenna kit 990-72050-98

IF-to-shelf cable RG-59/U Cable

060-72010-xx (3 m to 305 m) or

Mini RG-59 Cable 060-72050-xx (15 m to 152 m)

TimeSource 3600 Shelf

TimeSource 3600

SSSSSSSSSSSS SSSSSSSSSS SSSSSSS

Procedure D. Self-Adhesive Window Antenna Mounting and Cable Connection

Step Procedure

Prerequisite: Observe all guidelines, considerations, Dangers, Warnings, Cautions, and Notes in the Engineering and Ordering chapter.

Symmetricom Parts:

• Self-Adhesive Window Antenna Kit (990-72050-98)

• A length of RG-59/U plenum-rated coaxial cable (060-72010-xx), or

• A length of Mini RG-59/U plenum-rated coaxial cable (060-72050-xx)

For Self-Adhesive Window Antenna Installation

• Drill with bit of appropriate size and type to make pilot holes for the mounting screws

• 4 screws of appropriate size and type to attach the IF converter to a wall or other mounting surface.

• Screwdriver

• GPS handheld receiver, personal computer with GPS location software, or other method of determining latitude, longitude, and altitude

1 Peel off the backing of one of the self-adhesive hook-and-loop strips and stick the

strip to the antenna.

2 Attach the hook-and-loop side of the other strip to the hook-and-loop side of the

strip on the antenna.

3 Peel off the backing and stick the antenna to the position on the window selected in

Chapter 2, Engineering & Ordering.

4 Use user-supplied screws to mount the IF downconverter to a suitable wall or other

structure (Figure 18). Be sure the distance along the cable route between the IF downconverter and the antenna is no more than 3 m.

5 Route and connect the antenna cable to the antenna side of the IF downconverter.

6 Connect a cable to the TimeSource 3600 shelf side of the IF downconverter and

route the cable to the shelf location.

7 Secure the cable using local company procedures.

Installation

SSSSSSSSSSSS SSSSSSSSSS SSSSSSS

Procedure D. Self-Adhesive Window Antenna Mounting and Cable Connection (cont’d)

Step Procedure

8 Check all connections for tightness to prevent intermittent operation.

End of Procedure

Figure 18. Attaching the IF Converter

Use 4 user-supplied

screws to attach to a

wall or other stru c ture.

TimeSource 3600

SSSSSSSSSSSS SSSSSSSSSS SSSSSSS

Wall Antenna

Prior to installing the antenna, the site, antenna location, cable route, and all other details should have been planned.

Installation procedures are to follow local company procedures and the Installation Job Specification.

For best results, choose a wall facing the equator (facing south in the northern hemisphere, facing north in the southern hemisphere), and with the fewest obstructions of the sky.

To mount the antenna through the wall, refer to Figure 19 and follow Procedure E.

Figure 19. Wall Antenna-to-Shelf Cabling

Antenna Mounting Bracket

070-00413-01

Antenna

112-0013-01

SMA connector

(Attached to cable,

and on IF converter)

IF converter

090-72050-97

and Mounting Kit

TNC connector

(Attached to cable,

and on IF converter)

TNC Connector

(Attached to cable, and on shelf)

Antenna kit 990-72050-99

IF-to-shelf cable RG-59/U Cable

060-72010-xx (3 m to 305 m) or

Mini RG-59 Cable 060-72050-xx (15 m to 152 m)

TimeSource 36 00 She lf

Installation

SSSSSSSSSSSS SSSSSSSSSS SSSSSSS

Procedure E. Wall Antenna Installation

Step Action

Prerequisite: Observe all guidelines, considerations, Dangers, Warnings, Cautions, and Notes in the Engineering and Ordering chapter.

Symmetricom Parts:

• Wall Antenna Kit (990-72050-99)

• A length of RG-59/U plenum-rated coaxial cable (060-72010-xx), or

• A length of Mini RG-59/U plenum-rated coaxial cable (060-72050-xx)

User-Supplied Materials:

• Ladder, or safe method of reaching the antenna location on the exterior wall

• Drill with bits of appropriate size and type to make pilot holes for the antenna mounting bracket screws, and to make a hole through the wall for the antenna cable

• Two screws of appropriate size and type to attach the antenna mounting bracket to an exterior wall

• Screwdriver

• Electrically conductive antioxidant compound (Kopr-Shield or equivalent) to coat exposed connections to prevent oxidation

• Fire stopping material to seal the hole in the wall

• GPS handheld receiver, personal computer with GPS location software, or other method of determining latitude, longitude, and altitude

1 Attach the IF downconverter (Figure 18) inside the building to a suitable wall or

other structure. Be sure the distance along the cable route between the IF converter and the antenna is no more than 5.8 m. Include allowances for the drip loop and local company procedures for cable routing.

2 Use Figure 20 to determine the spacing of the 2 holes for mounting the bracket, and

the distance to the hole for passing the cable into the building.

3 Drill a 10-mm diameter hole through the wall for the antenna cable. The diameter of

the hole should be larger than the outer diameter of the SMA connector on the antenna cable, which will pass through the hole from the antenna to the inside of the building.

4 Drill two pilot holes for the user-supplied screws or bolts that attach the mounting

bracket to the outside wall.

5 Using two screws or bolts, mount the antenna bracket assembly to the outside wall.

TimeSource 3600

SSSSSSSSSSSS SSSSSSSSSS SSSSSSS

Procedure E. Wall Antenna Installation (cont’d)

Step Action

6 Place the magnetic side of the antenna on the outside of the mounting bracket.

7 Push the SMA connector of the antenna cable through the hole drilled in the wall in

Step 3. Be sure the antenna cable forms a drip loop between the antenna and the cable entry into the building (Figure 21).

8 Route the antenna cable to the antenna side of the IF converter and connect the

cable.

9 Connect a cable to the TimeSource 3600 shelf side of the IF downconverter and

route the cable to the shelf location.

10 Secure the cable using local company procedures.

11 Install fire-stopping material in all holes opened in the roof and/or walls during this

procedure.

12 Check all connections for tightness to prevent intermittent operation.

13 Coat all exposed connectors with an electrically conductive antioxidant compound

(e.g., Kopr-Shield spray).

Figure 20. Hole Spacing

8.6 cm

End of Procedure

5 cm

2.5 cm

Bracket mounting hole (2)

Antenna Cable hole

Installation

SSSSSSSSSSSS SSSSSSSSSS SSSSSSS

Figure 21. Wall Antenna Mounting

Holes for

bolts/screws

Mounting

bracket

Antenna

cable

Antenna

Wall

Hole for cable

Drip loop

TimeSource 3600

Building exterior Building interior

SSSSSSSSSSSS SSSSSSSSSS SSSSSSS

Rack Mounting

The shelf is shipped with the ears positioned for ETSI 53.5 cm mounting (Figure 22A). For 48 cm racks, the shelf can be positioned to the rear of the rack rail for flush mounting (Figure 22B) or to the front of the rack rail for 12.7 cm offset mounting (Figure 22C). Leave 1 RU (4.4 cm) of air space above the TimeSource 3600 Shelf for proper ventilation. Mount the shelf in the rack according to standard company practices.

Figure 22. Rack Mounting Options

Rack rails

Rear of rack

Top of shelf

Mounting ears

A. ETSI – 53.5 cm rack

Mounting ears

Rear of rack

Top of shelf Top of shelf

Rack rails Mounting ears

B. Flush mounting – 48 cm rack

Rack rails

Rear of rack

Top of shelf Top of shelf

C. 12.7 cm offset – 48 cm rack

Installation

12.7 cm

SSSSSSSSSSSS SSSSSSSSSS SSSSSSS

Output Module Installation

Warning:

to electrostatic discharge (ESD) damage. Be sure to wear an ESD wrist strap when making connections to the connector panel. Failure to observe this warning may result in equipment damage.

If an E1 8-output module, a IRIG-B 4-output module, or a ESCIU 2-port module is supplied with the system, install the module as follows:

1. Remove the shelf cover to access the shelf connector panel.

2. Plug the module into the OPTIONS I/O connector on the

3. Align the three spring-loaded screws on the module with the

4. Use a medium flat-blade screwdriver to lock each screw in

The circuitry on the plug-in circuit board is subject

connector panel (refer to Figure 23).

threaded holes on the panel.

place. Torque the screws evenly to prevent skewing the module.

TimeSource 3600

SSSSSSSSSSSS SSSSSSSSSS SSSSSSS

Figure 23. Options I/O Connector

OPTIONS I/O connector

Threaded screw holes

Installation

SSSSSSSSSSSS SSSSSSSSSS SSSSSSS

Power and Signal Cabling

Warning:

to electrostatic discharge (ESD) damage. Be sure to wear an ESD wrist strap when making connections to the connector panel. Failure to observe this warning may result in equipment damage.

Warning:

bonded to the metal plate with an adhesive. The overlay is an integral part of the ESD protection. Do not pierce, peel, or otherwise violate the integrity of the overlay. Failure to observe this warning may result in equipment damage.

The Craft connection is made at the shelf front panel. All other connections are made at the shelf connector panel. To access the shelf connector panel, remove its cover.

Figure 24 shows the connectors on the front panel and connector panel.

The circuitry on the plug-in circuit board is subject

The faceplate on the card contains a plastic overlay

TimeSource 3600

SSSSSSSSSSSS SSSSSSSSSS SSSSSSS

Figure 24. Connector Panel and Front Panel Connectors

10 MHz

output

E1 outputs

A & B

(BNC)

Battery A

& frame

ground

(TB2)

1 pps

output

E1 inputs A & B

(BNC)

E1 outputs

A & B

(wire-wrap)

GPS

antenna

input

Time of day

E1 inputs

A & B

(wire-wrap)

Expansion Bus

(Reserved for

future use)

Com

port 1

4 IRIG-B TOD outputs (BNC) or

Alarms

Com

port 2

Craft

Output Module:

8 E1 outputs (BNC or

wire-wrap) or

2 ESCIU ports (BNC or

wire-wrap)

Battery B

& frame

ground

(TB1)

Ethernet

Installation

SSSSSSSSSSSS SSSSSSSSSS SSSSSSS

Frame Ground

Frame ground connections are made on power terminal blocks TB1 and TB2. Refer to Figure 24 for the location of the terminals on the rear of the shelf, and refer to Figure 25 for the terminal connections.

Figure 25. Connector Panel Terminal Block Connections

TB (1 or 2)

BATT (A or B) RTN

N/C

Ensure the frame ground wires are long enough to reach from the shelf connector panel to the frame ground connection. Use one

1.47 mm (16 AWG) green insulated wire to connect the frame ground ( ) terminal of power terminal block TB1 to the frame ground, and use another 1.47 mm (16 AWG) green insulated wire to connect the terminal of TB2 to frame ground.

TimeSource 3600

SSSSSSSSSSSS SSSSSSSSSS SSSSSSS

Make the ground connection, following one of the methods described below, depending on whether a ground rod is installed:

With ground rod:

Solder the frame ground connection to the 4.115 mm (6 AWG) frame ground rod run vertically on each side of the rack. Two methods are acceptable:

• Crimp an appropriate-size spade lug (user-supplied) to the

1.47 mm (16 AWG) wire, bend the lug around the 4.115 mm (6 AWG) rod, and solder.

• Strip enough insulation from the 1.47 mm (16 AWG) wire to permit three complete turns around the 4.115 mm (6 AWG) rod, and solder.

Note:

the 4.115 mm (6 AWG) rod is heated sufficiently to prevent a cold solder connection.

When soldering, use a 25 watt soldering iron to ensure

Without ground rod:

Crimp the supplied spade lug to the 1.47 mm (16 AWG) wire, and screw the lug to a screw hole on the rack. Remove the paint and use sandpaper or a file to remove oxidation around the screw hole to ensure proper conductivity. Coat the connection with an electrically conductive antioxidant compound, for example, KoprShield spray.

Crimp the supplied spade lug to the other end of the 1.47 mm (16 AWG) wire, and connect it to the terminals on TB1 and TB2 (Figure 25).

If the power is not to be connected immediately, replace the protective covers on the terminal blocks.

Installation

SSSSSSSSSSSS SSSSSSSSSS SSSSSSS

Power

Warning:

restricted access location. Power source protective fusing must be provided as part of the installation.

Caution:

instructed in this procedure. Before connecting the power cables to the TimeSource 3600, ensure the fuses are removed from the fuse panel that supplies power to the power cables.

Note:

replaceable fuses in the TimeSource 3600.

Power connections are made on power terminal blocks TB1 and TB2. Refer to Figure 24 for the location of the terminals on the rear of the shelf, and refer to Figure 25 for the terminal connections.

Remove the protective covers from the terminal blocks, if covered.

Ensure the power wires are long enough to reach from the shelf connector panel to the office battery source connection.

Use two 1.47mm (16 AWG) stranded wires for the power connection, one with red insulation (BATT), and the other with black insulation (RTN). Crimp a supplied spade lug to each wire.

This equipment is intended for installation in a

Do not apply power to the TimeSource 3600 before

Input power is reverse polarity protected; there are no user

Connect the power wires with red insulation to the –48V wire receptacles on TB1 and TB2. Connect the power wires with black insulation to the RTN wire receptacles on TB1 and TB2.

Replace the protective covers on the terminal blocks.

Note:

recommended. If separate office battery supplies are not available, connect a single office battery to both inputs (TB1 and TB2) to avoid a standing battery-failure alarm.

TimeSource 3600

Two separate office battery supplies (–48V A and –48V B) are

SSSSSSSSSSSS SSSSSSSSSS SSSSSSS

GPS Antenna

Use the supplied 90 degree adapter to connect the coaxial cable from the lightning suppressor or IF downconverter to the TNC connector labeled GPS ANT. Refer to Figure 24 for the connector location.

10 MHz Output

Connect a user-supplied RG-58 coaxial cable from the connector labeled 10 MHz to the equipment that will use the 10 MHz output signal. See Figure 24 for the connector location.

Installation

SSSSSSSSSSSS SSSSSSSSSS SSSSSSS

E1 or Analog Synchronization Outputs

Warning:

lightning protection, do not connect the E1 output line directly to a point outside the building. Failure to observe this warning may result in equipment damage.

Connect the E1 or analog synchronization outputs at the wirewrap pins or BNC connectors labeled E1 OUT A and E1 OUT B. If using the wire-wrap pins, connect the tip wire to the pins labeled T, the ring wire to the pins labeled R, and the shield to the pins labeled S. See Figure 24 for the location of the connectors and pins, and Figure 26 for the wire-wrap connections.

Because the E1 output circuits do not provide

Notes:

1. For wire-wrap connections, the shield pin is provided to ground the cable shield at the shelf, if required. Normally, the shield is grounded at the source. Grounding the shield at both ends is not recommended.

2. A BNC connector can be used for one output, and a wire-wrap

connector can be used for the other output, but do not use the BNC and wire-wrap connectors of the same output simultaneously. For example, a BNC connector can be used for output A and the wire-wrap pins for output B, but do not use the output A BNC connector with the output A wire-wrap connector.

Figure 26. E1 or Analog Output Wire-Wrap Connections

T R S

TimeSource 3600

SSSSSSSSSSSS SSSSSSSSSS SSSSSSS

Expansion Bus

Reserved for future use.

1 PPS Output

Connect a user-supplied RG-58 coaxial cable from the connector labeled TTL PPS to the equipment that will use the 1 pulse-persecond TTL output signal. See Figure 24 for the connector location.

Installation

SSSSSSSSSSSS SSSSSSSSSS SSSSSSS

E1 or Analog Reference Inputs

Warning:

lightning protection, do not connect the E1 input line directly to a point outside the building. Failure to observe this warning may result in equipment damage.

E1 or analog reference sources, traceable to an independent Stratum 1 source, can be connected to further increase holdover stability, or to be monitored by the TimeSource 3600. In either case, connect reference inputs to the wire-wrap pins or BNC connectors labeled SPAN IN A and SPAN IN B. If using the wirewrap pins, connect the tip wire to the pin labeled T, the ring wire to the pin labeled R, and the shield (if connected at the TimeSource 3600) to the pin labeled S. See Figure 24 for the location of the connectors and pins, and Figure 27 for the wirewrap connections.

Because the E1 input circuits do not provide

Notes:

1. The shield pin is capacitively coupled to ground. Normally, the shield is grounded at the source. Grounding the shield at both ends is not

2. A BNC connector can be used for one input, and a wire-wrap connector can be used for the other input, but do not use the BNC and wire-wrap connectors of the same input simultaneously. For example, a BNC connector can be used for input A and the wire-wrap pins for input B, but do not use the input A BNC connector with the input A wire-wrap connector.

recommended.

Figure 27. E1 or Analog Input Wire-Wrap Connections

T R S

TimeSource 3600

SSSSSSSSSSSS SSSSSSSSSS SSSSSSS

Module for Additional E1 or Analog Outputs (990-72060-02 System Only)

Connect up to eight optional E1 or analog outputs at the wirewrap or BNC output module. See Figure 24 for the connector location, and Figure 28 for the connections.

Note:

The shield pin is capacitively coupled to ground, therefore, the shield must be connected at the source end. The shield may also be connected at the TimeSource 3600 end for additional longitudinal noise protection.

Figure 28. Eight E1 or Analog Outputs Connections

Wire-Wrap BNC

OUT 7OUT 8

Output 8 Output 5

Output 6

Output 3

T R S

OUT 6 OUT 5 OUT 4

T R S

Output 7

R S

Output 4

R S

Output 2

OUT 1OUT 2OUT 3

Output 1

R S

Output 8

Output 6

Output 4

Output 2

OUT 8

OUT 6

OUT 4

OUT 2

OUT 7

OUT 5

OUT 3

OUT 1

Output 7

Output 5

Output 3

Output 1

Installation

SSSSSSSSSSSS SSSSSSSSSS SSSSSSS

Module for IRIG-B TOD Outputs (990-72060-05 System Only)

Connect up to four optional IRIG-B TOD outputs at the output module. See Figure 24 for the connector location, and Figure 29 for the connections.

Figure 29. IRIG-B TOD Output Connections

Note:

Output 4

Output 2

OUT 8

OUT 6

OUT 4

OUT 2 OUT 1

OUT 7

OUT 5

OUT 3

Note: Outputs 5, 6, 7 and 8 are not used

Output 3

Output 1

TimeSource 3600

SSSSSSSSSSSS SSSSSSSSSS SSSSSSS

Module for ESCIU Ports (990-72060-04 System Only)

The ESCIU ports (Figure 30) have a different function than the synchronization outputs. A synchronization output provides an all-ones reference clock signals for network elements. An ESCIU port carries live E1 traffic, and synchronizes the live traffic as it passes through. The ESCIU module can synchronize 2 spans in one direction. The return direction passes through as it is.

The ESCIU ports can connect at the digital distribution frame (DDF). The network elements receiving the ESCIU output signal must be able to receive E1 signals that conform to CCITT G.703 paragraph 6 specifications. The network element can be configured to extract its timing from the live E1 traffic signal.

A bypass relay directs E1 traffic around the ESCIU circuitry to maintain span continuity if a TimeSource 3600 fault occurs.

Figure 30. Connector Layout of ESCIU Modules

Span 2 NE

return (not syn-

chronized)

Span 2 to NE

(synchronized)

RTN2 OUT

RTN2 IN

OUT

SPAN 2

RTN1 OUT

RTN1 IN

OUT

SPAN 1

Span 1 NE return (not synchronized)

Span 1 to NE (synchronized)

Span 2 NE

return (not

synchronized)

Span 2 toNE

(synchronized)

RTN2

SPAN 2 SPAN 1

OUT T R S

T R S

OUT

T R S

RTN1

T R S

OUT

Span 1 NE return (not synchronized)

Span 1 to NE (synchronized)

BNC Module Wire-Wrap Module

Installation

SSSSSSSSSSSS SSSSSSSSSS SSSSSSS

Cutover Procedures for Out-of-Service Equipment

If DDF access jack sets are not cabled to the ESCIU module, the following out-of-service cutover procedure must be used. Consult the local company Installation Job Specifications to ensure that the network element to be retimed is connected to the ESCIU module correctly. Refer to Figure 31 for the following procedure:

1. Remove from service (turn down) the traffic trunks on the E1 system to be cutover to the ESCIU module.

2. Remove the existing cabling in both directions between the transmit (OUT) and receive (IN) terminals of the NEs that will connect to the ESCIU module.

3. In the direction not to be synchronized by the ESCIU module, connect new cables from the ESCIU module RTNx IN connector to the NE transmit (OUT) terminal, and connect from the ESCIU module RTNx OUT connector to the NE receive (IN) terminal.

4. In the direction to be synchronized by the ESCIU module, connect new cables from the ESCIU module IN connector to the NE transmit (OUT) terminal, and connect from the ESCIU module OUT connector to the NE receive (IN) terminal.

5. Verify that there are no alarms on the NEs on the E1 system. If

Note:

satellites, alarms may be present. All synchronization-related alarms should clear while the TimeSource 3600 is in steady-state operation.

6. Restore (turn up) the traffic trunks to service.

TimeSource 3600

there are alarms, recheck the new cabling between the NEs and the ESCIU module.

If the TimeSource 3600 is still in warm-up or searching for GPS

SSSSSSSSSSSS SSSSSSSSSS SSSSSSS

Figure 31. ESCIU Cutover without Jacks (Out-of-Service)

REMOVE EXISTING

NETWORK

ELEMENT OR

FACILITY

NOT BEING

TIMED FROM

ESCIU

MODULE

RECEIVE

(IN)

TRANSMIT

(OUT)

CABLING

RTN1 OUT

RTN1 IN

RECEIVE

(IN)

TRANSMIT

(OUT)

NETWORK

ELEMENT

BEING TIMED

FROM ESCIU

MODULE

SPAN 1

ESCIU

MODULE

OUT

Existing cabling Remove existing cabling

New cabling Connection point

Installation

SSSSSSSSSSSS SSSSSSSSSS SSSSSSS

Cutover Procedures for In-Service Equipment

If standard digital signal level access jack sets, such as DDF or DSX-1 jacks, were cabled to the ESCIU module, the following in-service cutover procedure must be used. Consult the local company Installation Job Specifications to ensure that the network element to be retimed from the ESCIU module is connected to the ESCIU module A OUT terminals. Refer to Figure 32 for the following procedure:

1. Patch a bridging repeater from the MON jack of one NE to the IN jack of the other NE in both directions of transmission on the E1

system to be cutover. Place a 75 Ω termination plug in the OUT

jack in each direction.

2. Remove the cross-connect wiring from the OUT and IN jacks (offnormal side of jacks) in both directions of transmission.

5. Remove the 75 Ω (E1) termination plug from the OUT jack and

6. Verify that there are no alarms on the NEs on the E1 system. If

Note:

satellites, alarms may be present. All synchronization-related alarms should clear while the TimeSource 3600 is in steady-state operation.

7. Remove the remaining patch cords from the NE MON jack.

TimeSource 3600

patch cords from the NE IN jack. The E1 system bitstream is now going through the ESCIU module.

there are alarms, repeat Step 1 and recheck the cross-connect wiring. Repeat Step 5.

If the TimeSource 3600 is still in warm-up or searching for GPS

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Figure 32. ESCIU Cutover with Jacks (In-Service)

PRIMARY

REFERENCE

LINE

INTF

EQPMT

SECONDARY

REFERENCE

LINE

INTF

EQPMT

R T

OUT

MON

OUT

MON

INTERFACE

DIGITAL

PORT

DIGITAL

SWITCH

MACHINE*

DIGITAL

PORT

Patch Cord Bridging Repeaters DSX-1 Jacks

Existing cabling

to be removed

ESCIU cabling

Refer to In-Service Equipment for procedures

MON

OUT

MON

RTN1 OUT

RTN1 IN

OUT

SPAN 1

OUT

MON

ESCIU MODULE

* Some digital switch

machines designate two traffic-carrying E1 systems as their primary and secondary clock reference sources.

Installation

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Time of Day Output

Connect a time of day (TOD) output at the female RJ-45 connector labeled TOD. See Figure 24 for the connector location, and Table B for the connector pinouts.

Table B. TOD Connector Pinouts

Pin Signal Abbreviation Direction

1 1 pps A TOD PPS + From TimeSource 3600

2 1 pps B TOD PPS – From TimeSource 3600

3 12 V power source TOD P12V —

4 Receive data B TOD RXD – To TimeSource 3600

5 Receive data A TOD RXD + To TimeSource 3600

6 Circuit ground TOD GND —

7 Transmit data A TOD TXD + From TimeSource 3600

8 Transmit data B TOD TXD – From TimeSource 3600

Note: Pins not listed are reserved for future use.

If the device receiving the time code (for example, Cisco router) accepts an RS-232 cable instead of an RS-422 cable, follow Procedure F to install the RS-422–to–RS-232 TOD converter.

Note:

Cisco router or NTP Type 4 compatible device is installed, and power applied, per manufacturer’s instructions.

TimeSource 3600

Before performing Procedure F, ensure that the appropriate

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Procedure F. RJ-422–to–RS-232 TOD Converter Installation

Step Procedure

1 Secure the provided mounting plate to the RS-422–to–RS-232 TOD converter, using

the two provided screws. The plate may be attached to the top or front of the converter, depending on the desired surface (for example, a rack or cabinet) to which the converter will be mounted (see Figure 33).

Notes:

1. Due to distance constraints, the converter must be placed no more than 305 m from the TimeSource 3600 Shelf, and no more than 15 m from the device receiving the time code.

2. The converter dimensions are 7.5 cm by 3.8 cm by 2.5 cm.

3. The mounting plate dimensions are 7.5 cm by 5 cm.

2 Secure the converter to the desired surface, using the slots in the plate and user-

supplied bolts.

3 Install a user-supplied Category 5 four-pair RS-422 cable, with RJ-45 connectors on

each end, between the TimeSource 3600 Shelf and the converter (see Figure 34).

4 Install a user-supplied RS-232 cable, with DB-25 connectors on each end, between

the converter and the device receiving the time code (see Figure 34). See Table Table C for the DB-25 connector pinouts.

End of Procedure

Figure 33. RS-422–to–RS-232 TOD Converter Mounting Plate

Screws

(supplied)

TOD Converter

Mounting plate attached to top of converter

TOD

Converter

Mounting plate attached to front of converter

Screws (supplied)

Installation

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Figure 34. RS-422–to–RS-232 TOD Converter Connections

DB-25

Connector

To device

receiving

time code

(Female)

15 m

max.

TOD

Converter

RJ-45 Connector (Female)

Table C. Converter DB-25 Connector Pinouts

Pin Signal

1 Frame ground

3 Data output (RS-232)

305 m

max.

To TimeSource 3600

5 1 pps (RS-232)

7 Signal ground

Note: Pins not listed are reserved for future use.

TimeSource 3600

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Ethernet

Connect a user-supplied Ethernet cable from the network to the 10base-T Ethernet connector labeled E-NET. See Figure 24 for the connector location, and Table D for the connector pinouts.

Table D. Ethernet 10base-T RJ-45 Connector Pinouts

Pin Signal Abbreviation Direction

1 Transmit data + TXD + From TimeSource 3600

2 Transmit data – TXD – From TimeSource 3600

3 Receive data + RXD + To TimeSource 3600

4— — —

5— — —

6 Receive data – RXD – To TimeSource 3600

7— — —

8— — —

Installation

SSSSSSSSSSSS SSSSSSSSSS SSSSSSS

Communication Port 1

To provide an RS-232 link for TL1 command access to the TimeSource 3600, connect to port 1 at the female 25-pin D connector labeled COM1. See Figure 24 for the location of the connector. See Table E for the connector pinouts.

Note:

data on pin 3. Be sure the other equipment receives data from the transmitting pin, and transmits data to the receiving pin.

Table E. COM1 Connector Pinouts

Pin Signal Abbreviation Direction

2 Transmit data TXD From TimeSource 3600

3 Receive data RXD To TimeSource 3600

4 Request to send RTS From TimeSource 3600

5 Clear to send CTS To TimeSource 3600

7Signal ground GND —

20 Data terminal ready DTR From TimeSource 3600

The COM1 connector transmits data on pin 2, and receives

Note: Pins not listed are reserved for future use.

100

TimeSource 3600

Symmetricom TimeSource 3600 User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual

Contents

Description

Overview

Global Positioning System

Physical Description

Roof Antenna

Mechanical Window Antenna

Self-Adhesive Window Antenna

Wall Antenna

Functional Description

Overview

Antenna

IF Interface

GPS Receiver

Local Oscillator

Clock Extractors

Power Supply

BesTime Ensemble Timing Generator

E1 or Analog Outputs

Eight Additional E1 or Analog Outputs (990-72060-02 Systems Only)

TOD Output

IRIG-B TOD Outputs (990-72060-05 Systems Only)

1 PPS Output

10 MHz Output

Tw o E S C I U Po r t s (990-72060-04 Systems Only)

Alarm Interface

Communication Ports

Ethernet

Engineering & Ordering

Antenna Guidelines

Roof Antenna Location and Cabling Guidelines

Roof Antenna Earth Ground Location Guidelines

Roof Antenna Cable Choices

Window and Wall Antenna Location Guidelines

Window and Wall Antenna Cable Choices

IRIG-B TOD (990-72060-05 System Only)

RJ-422–to–RS-232 TOD Converter

Shelf Considerations

Systems

Standard System (Two E1 Outputs)

With Eight Additional E1 or 2.048 MHz Outputs

With Two E1 Synchronization Insertion (ESCIU) Ports

With Four IRIG-B TOD Outputs

Antennas

Roof Antenna

Mechanical Window Antenna

Self-Adhesive Window Antenna

Wall Antenna

User-Supplied Tools and Materials

For Roof Antenna Installation

For Mechanical Window Antenna Installation

For Self-Adhesive Window Antenna Installation

For Wall Antenna Installation

For Shelf Installation

Outputs, Power, and Miscellaneous

Installation

Unpacking

Antenna

Roof Antenna

Mechanical Window Antenna

Self-Adhesive Window Antenna

Wall Antenna

Rack Mounting

Output Module Installation

Power and Signal Cabling

Frame Ground

Power

GPS Antenna

10 MHz Output

E1 or Analog Synchronization Outputs

Expansion Bus

1 PPS Output

E1 or Analog Reference Inputs

Module for Additional E1 or Analog Outputs (990-72060-02 System Only)

Module for IRIG-B TOD Outputs (990-72060-05 System Only)

Module for ESCIU Ports (990-72060-04 System Only)