Spectracom SecureSync Product information sheet

SecureSync®
Time and Frequency
Synchronization System
User Reference Guide
Document Part No.: 1200-5000-0050
Revision: 26
Date: 25-May-2018
spectracom.com

© 2018 Spectracom. All rights reserved.
The information in this document has been carefully reviewed and is
believed to be accurate and up-to-date. Spectracom assumes no respons-
ibility for any errors or omissions that may be contained in this document,
and makes no commitment to keep current the information in this manual, or
to notify any person or organization of updates. This User Reference Guide
is subject to change without notice. For the most current version of this doc-
umentation, please see our web site at spectracom.com.
Spectracom reserves the right to make changes to the product described in
this document at any time and without notice. Any software that may be
provided with the product described in this document is furnished under a
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or copied only in accordance with the terms of those agreements.
No part of this publication may be reproduced, stored in a retrieval sys-
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chaser's personal use without the written permission of Spectracom
Other products and companies referred to herein are trademarks or
registered trademarks of their respective companies or mark holders.
Orolia USA, Inc. dba Spectracom
• 1565 Jefferson Road, Suite 460, Rochester, NY 14623 USA
• 3, Avenue du Canada, 91974 Les Ulis Cedex, France
• Room 208, No. 3 Zhong Guan Village South Road, Hai Dian District, Beijing 100081, China
Do you have questions or comments regarding this User Reference Guide?
èE-mail:
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For a copy of Spectracom's Limited Warranty policy, see the Spectracom
website: http://spectracom.com/support/warranty-information.
SecureSync User Reference Guide I

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II SecureSync User Reference Guide

CONTENTS
SecureSync User Reference Guide • TABLE OF CONTENTS III
CHAPTER 1
Product Description 1
1.1 Getting Started 2
1.2 SecureSync Introduction 2
1.2.1 SecureSync's Inputs and Outputs 3
1.3 SecureSync Front Panel 3
1.3.1 Front Panel Keypad, and Display 4
1.3.1.1 Using the Keypad 4
1.3.1.2 Navigating the Front Panel Display 4
1.3.2 Status LEDs 6
1.4 Unit Rear Panel 7
1.5 Option Cards 8
1.5.1 Option Cards Overview 10
1.5.2 Option Card Identification 13
1.5.2.1 Option Card Identification by ID/Part Number 13
1.5.3 Option Card Connectors 16
1.6 The SecureSync Web UI 18
1.6.1 The Web UI HOME Screen 18
1.6.2 The INTERFACES Menu 19
1.6.3 The Configuration MANAGEMENT Menu 20
1.6.4 The TOOLS Menu 21
1.7 Specifications 22
1.7.1 Input Power 22
1.7.1.1 Fuses 22
1.7.2 GNSS Receiver 23
1.7.3 RS-232 Serial Port (Front Panel) 23
1.7.4 10/100 Ethernet Port 23
1.7.5 Protocols Supported 24
1.7.6 1PPS Output 24
1.7.7 10 MHz Output 25
1.7.7.1 10 MHz Output — Oscillator Phase Noise (dBc/Hz) 26

1.7.8 Mechanical and Environmental Specifications 26
1.8 Regulatory Compliance 27
CHAPTER 2
SETUP 29
2.1 Overview 30
2.1.1 Main Installation Steps 30
2.2 Unpacking and Inventory 31
2.3 Required Tools and Parts 32
2.3.1 Required GNSS Antenna Components 32
2.4 SAFETY 33
2.4.1 Safety: Symbols Used 33
2.4.2 SAFETY: Before You Begin Installation 33
2.4.3 SAFETY: User Responsibilities 36
2.4.4 SAFETY: Other Tips 36
2.5 Mounting the Unit 36
2.5.1 Rack Mounting 36
2.6 Connecting Supply Power 38
2.6.1 Power Source Selection 38
2.6.2 Using AC Input Power 38
2.6.3 Using DC Input Power 39
2.7 Connecting the GNSS Input 41
2.8 Connecting Network Cables 42
2.9 Connecting Inputs and Outputs 43
2.10 Powering Up the Unit 43
2.11 Setting up an IP Address 44
2.11.1 Dynamic vs. Static IP Address 45
2.11.2 Assigning a Static IP Address 45
2.11.2.1 Assigning a New Static IP Address 46
2.11.2.2 Setting Up an IP Address via the Front Panel 48
2.11.2.3 Setting Up a Static IP Address via a DHCP Network 50
2.11.2.4 Setting Up an IP Address via the Serial Port 51
2.11.2.5 Setting up a Static IP Address via Ethernet Cable 52
2.11.3 Subnet Mask Values 53
IV SecureSync User Reference Guide • TABLE OF CONTENTS

2.12 Accessing the WebUI 53
2.13 Configuring Network Settings 55
2.13.1 General Network Settings 56
2.13.2 Network Ports 57
2.13.3 Network Services 60
2.13.4 Static Routes 62
2.13.5 Access Rules 64
2.13.6 HTTPS 65
2.13.6.1 Accessing the HTTPS Setup Window 65
2.13.6.2 About HTTPS 67
2.13.6.3 Supported Certificate Formats 67
2.13.6.4 Creating an HTTPS Certificate Request 68
2.13.6.5 Adding HTTPS Subject Alternative Names 71
2.13.6.6 Requesting an HTTPS Certificate 73
2.13.6.7 Uploading an X.509 PEM Certificate Text 74
2.13.6.8 Uploading an HTTPS Certificate File 75
2.13.7 SSH 76
2.13.8 SNMP 84
2.13.8.1 SNMP V1/V2c 88
2.13.8.2 SNMP V3 90
2.13.8.3 SNMP Traps 91
2.13.9 System Time Message 93
2.13.9.1 System Time Message Format 94
2.14 Configuring NTP 95
2.14.1 Checklist NTP Configuration 95
2.14.2 The NTP Setup Screen 95
2.14.3 Dis-/Enabling NTP 98
2.14.4 Viewing NTP Clients 99
2.14.5 Restoring the Default NTP Configuration 100
2.14.6 NTP Output Timescale 100
2.14.7 NTP Reference Configuration 102
2.14.7.1 The NTP Stratum Model 102
2.14.7.2 Configuring "NTP Stratum 1" Operation 102
2.14.7.3 Configuring "NTP Stratum Synchronization" 103
2.14.8 NTP Servers and Peers 104
2.14.8.1 The NTP Servers and NTP Peers Panels 106
2.14.8.2 NTP Servers: Adding, Configuring, Removing 107
SecureSync User Reference Guide • TABLE OF CONTENTS V

2.14.8.3 NTP Peers: Adding, Configuring, Removing 109
2.14.9 NTP Authentication 111
2.14.9.1 NTP Autokey 111
2.14.9.2 NTP: Symmetric Keys (MD5) 117
2.14.10 NTP Access Restrictions 119
2.14.11 Enabling/Disabling NTP Broadcasting 121
2.14.12 NTP over Anycast 122
2.14.12.1 Configuring NTP over Anycast (General Settings) 123
2.14.12.2 Configuring NTP over Anycast (OSPF IPv4) 124
2.14.12.3 Configuring NTP over Anycast (OSPF IPv6) 125
2.14.12.4 Configuring NTP over Anycast (BGP) 126
2.14.12.5 Configuring Anycast via NTP Expert Mode 127
2.14.12.6 Testing NTP over Anycast 130
2.14.13 NTP Orphan Mode 130
2.14.14 Host Disciplining 131
2.14.14.1 Enabling Host Disciplining 132
2.14.15 NTP Expert Mode 132
2.14.16 Spectracom Technical Support for NTP 135
2.15 Configuring Input References 136
2.16 Configuring Outputs 136
2.16.1 The Outputs Screen 137
2.16.2 The 1PPS and 10MHz Outputs 138
2.16.2.1 Configuring a 1PPS Output 140
2.16.2.2 Configuring the 10 MHz Output 140
2.16.3 Configuring Optional Outputs 141
2.16.4 Network Ports 141
2.16.5 Signature Control 141
CHAPTER 3
Managing Time 145
3.1 The Time Management Screen 146
3.2 System Time 147
3.2.1 System Time 148
3.2.1.1 Configuring the System Time 148
3.2.1.2 Timescales 149
3.2.1.3 Manually Setting the Time 150
3.2.1.4 Using Battery Backed Time on Startup 152
VI SecureSync User Reference Guide • TABLE OF CONTENTS

3.2.2 Timescale Offset(s) 154
3.2.2.1 Configuring a Timescale Offset 154
3.2.3 Leap Seconds 155
3.2.3.1 Reasons for a Leap Second Correction 155
3.2.3.2 Leap Second Alert Notification 156
3.2.3.3 Leap Second Correction Sequence 156
3.2.3.4 Configuring a Leap Second 157
3.2.4 Local Clock(s), DST 158
3.2.4.1 Adding a Local Clock 158
3.2.4.2 DST Examples 160
3.2.4.3 DST and UTC, GMT 161
3.3 Managing References 161
3.3.1 Input Reference Priorities 161
3.3.1.1 Configuring Input Reference Priorities 163
3.3.1.2 The "Local System" Reference 166
3.3.1.3 The "User/User" Reference 167
3.3.1.4 Reference Priorities: EXAMPLES 169
3.3.2 Reference Qualification and Validation 172
3.3.2.1 Reference Monitoring: Phase 172
3.3.2.2 BroadShield 174
3.3.3 The GNSS Reference 182
3.3.3.1 Reviewing the GNSS Reference Status 183
3.3.3.2 Determining Your GNSS Receiver Model 187
3.3.3.3 Selecting a GNSS Receiver Mode 189
3.3.3.4 Setting GNSS Receiver Dynamics 192
3.3.3.5 Performing a GNSS Receiver Survey 194
3.3.3.6 GNSS Receiver Offset 195
3.3.3.7 Resetting the GNSS Receiver 196
3.3.3.8 Deleting the GNSS Receiver Position 197
3.3.3.9 Manually Setting the GNSS Position 198
3.3.3.10 GNSS Constellations 201
3.3.3.11 A-GPS 205
3.4 Holdover Mode 210
3.5 Managing the Oscillator 213
3.5.1 Oscillator Types 214
3.5.2 Configuring the Oscillator 215
3.5.2.1 Time Figure of Merit (TFOM) 217
SecureSync User Reference Guide • TABLE OF CONTENTS VII

3.5.3 Monitoring the Oscillator 218
3.5.4 Oscillator Logs 221
3.6 Managing TimeKeeper 221
3.6.1 What is TimeKeeper? 222
3.6.1.1 What can TimeKeeper do for me? 222
3.6.1.2 Using TimeKeeper – First Steps 222
3.6.2 Has TimeKeeper been activated? 223
3.6.3 Configuring a TimeKeeper PTP Master 224
3.6.4 Configuring TimeKeeper PTP Slaves 226
3.6.5 Configuring TimeKeeper as an NTP Time Server 229
3.6.6 En-/Disabling TimeKeeper 230
3.6.7 Status Monitoring with TimeKeeper 231
3.6.7.1 Enabling Status Monitoring 231
3.6.7.2 TKL "Status" Tab 232
3.6.7.3 TKL "Timing Quality" Tab 232
3.6.7.4 TKL "Time Map" Tab 233
CHAPTER 4
System Administration 235
4.1 Powering Up/Shutting Down 236
4.1.1 Powering Up the Unit 236
4.1.2 Shutting Down the Unit 237
4.1.3 Issuing the HALT Command Before Removing Power 237
4.1.4 Rebooting the System 238
4.2 Notifications 239
4.2.1 Configuring Notifications 240
4.2.2 Notification Event Types 242
4.2.2.1 Timing Tab: Events 242
4.2.2.2 GPS Tab: Events 242
4.2.2.3 System Tab: Events 243
4.2.3 Configuring GPS Notification Alarm Thresholds 243
4.2.4 Setting Up SNMP Notifications 244
4.2.5 Setting Up Email Notifications 245
4.3 Managing Users and Security 247
4.3.1 Managing User Accounts 247
4.3.1.1 Types of Accounts 247
VIII SecureSync User Reference Guide • TABLE OF CONTENTS

4.3.1.2 About "user" Account Permissions 247
4.3.1.3 Rules for Usernames 249
4.3.1.4 Adding/Deleting/Changing User Accounts 249
4.3.2 Managing Passwords 251
4.3.2.1 Configuring Password Policies 252
4.3.2.2 The Administrator Password 252
4.3.2.3 Lost Password 253
4.3.3 LDAP Authentication 256
4.3.4 RADIUS Authentication 262
4.3.4.1 Enabling/Disabling RADIUS 262
4.3.4.2 Adding/Removing a RADIUS Server 263
4.3.5 TACACS+ Authentication 265
4.3.5.1 Enabling/Disabling TACACS+ 265
4.3.5.2 Adding/Removing a TACACS+ Server 265
4.3.6 HTTPS Security Levels 266
4.3.7 Unlocking the Keypad via Keypad 268
4.3.8 If a Secure Unit Becomes Inaccessible 268
4.4 Miscellanous Typical Configuration Tasks 268
4.4.1 Web UI Timeout 268
4.4.2 Configuring the Front Panel 269
4.4.3 Displaying Local Time 273
4.4.4 Creating a Login Banner 273
4.4.5 Show Clock 274
4.4.6 Product Registration 275
4.4.7 Synchronizing Network PCs 275
4.4.8 Selecting the UI Language 275
4.5 Quality Management 276
4.5.1 System Monitoring 276
4.5.1.1 Status Monitoring via Front Panel 276
4.5.1.2 Status Monitoring via the Web UI 276
4.5.1.3 Status Monitoring of Input References 279
4.5.1.4 Reference Monitoring: Phase 281
4.5.1.5 Ethernet Monitoring 283
4.5.1.6 Outputs Status Monitoring 284
4.5.1.7 Monitoring the Oscillator 287
4.5.1.8 Monitoring the Status of Option Cards 290
4.5.1.9 NTP Status Monitoring 292
SecureSync User Reference Guide • TABLE OF CONTENTS IX

4.5.1.10 Temperature Management 297
4.5.2 Logs 303
4.5.2.1 Types of Logs 304
4.5.2.2 Local and Remote Logs 308
4.5.2.3 The Logs Screen 308
4.5.2.4 Displaying Individual Logs 310
4.5.2.5 Saving and Downloading Logs 311
4.5.2.6 Configuring Logs 313
4.5.2.7 Setting up a Remote Log Server 315
4.5.2.8 Restoring Log Configurations 317
4.5.2.9 Clearing All Logs 318
4.5.2.10 Clearing Selected Logs 318
4.6 Updates and Licenses 319
4.6.1 Software Updates 319
4.6.2 Applying a License File 321
4.7 Resetting the Unit to Factory Configuration 322
4.7.1 Resetting All Configurations to their Factory Defaults 322
4.7.2 Backing-up and Restoring Configuration Files 323
4.7.2.1 Accessing the System Configuration Screen 323
4.7.2.2 Saving the System Configuration Files 325
4.7.2.3 Uploading Configuration Files 326
4.7.2.4 Restoring the System Configuration 327
4.7.2.5 Restoring the Factory Defaults 328
4.7.3 Cleaning the Configuration Files and Halting the System 328
4.7.4 Default and Recommended Configurations 328
4.7.5 Sanitizing the Unit 329
4.7.5.1 Physically Removing the CF Card 330
4.7.5.2 Cleaning/Restoring 330
4.7.5.3 Removing Other Files From the CF Card 331
4.7.5.4 Further Reading 331
APPENDIX
Appendix 333
5.1 Troubleshooting 334
5.1.1 Troubleshooting Using the Status LEDs 334
5.1.2 Minor and Major Alarms 335
5.1.3 Troubleshooting: System Configuration 336
XSecureSync User Reference Guide • TABLE OF CONTENTS

5.1.3.1 System Troubleshooting: Browser Support 337
5.1.4 Troubleshooting – Unable to Open Web UI 337
5.1.5 Troubleshooting via Web UI Status Page 338
5.1.6 Troubleshooting GNSS Reception 340
5.1.7 Troubleshooting – Keypad Is Locked 341
5.1.8 Troubleshooting – 1PPS, 10 MHz Outputs 341
5.1.9 Troubleshooting – Blank Information Display 342
5.1.10 Troubleshooting the Front Panel Serial Port 343
5.1.11 Troubleshooting the Front Panel Cooling Fan 343
5.1.12 Troubleshooting – Network PCs Cannot Sync 344
5.1.13 Troubleshooting Software Update 344
5.2 Option Cards 345
5.2.1 Accessing Option Cards Settings via the WebUI 345
5.2.1.1 Web UI Navigation: Option Cards 346
5.2.1.2 Viewing Input/Output Configuration Settings 347
5.2.1.3 Configuring Option Card Inputs/Outputs 348
5.2.1.4 Viewing an Input/Output Signal State 349
5.2.1.5 Verifying the Validity of an Input Signal 350
5.2.2 Option Card Field Installation Instructions 351
5.2.2.1 Field Installation: Introduction 351
5.2.2.2 Outline of the Installation Procedure 352
5.2.2.3 Safety 352
5.2.2.4 [1]: Unpacking 353
5.2.2.5 [2]: Saving Refererence Priority Configuration 353
5.2.2.6 [3]: Determining the Installation Procedure 354
5.2.2.7 [4]: Bottom Slot Installation 355
5.2.2.8 [5]: Top Slot Installation, Bottom Slot Empty 356
5.2.2.9 [6]: Top Slot Installation, Bottom Slot Occupied 358
5.2.2.10 [7]: Frequency Output Cards: Wiring 360
5.2.2.11 [8]: Gb ETH Card Installation, Slot1 Empty 361
5.2.2.12 [9]: Gb ETH Card Installation, Slot1 Occupied 363
5.2.2.13 [10]: Alarm Relay Card, Cable Installation 364
5.2.2.14 [11]: Verifying HW Detection and SW Update 365
5.2.2.15 [12]: Restoring Reference Priority Configuration 367
5.2.3 Time and Frequency Option Cards 367
5.2.3.1 1PPS Out [1204-18, -19, -21, -2B] 367
5.2.3.2 1PPS In/Out [1204-28, -2A] 372
5.2.3.3 1PPS In/Out, 10MHz In [1204-01, -03] 377
SecureSync User Reference Guide • TABLE OF CONTENTS XI

5.2.3.4 Frequency Out [1204-08, -1C, -26, -38] 384
5.2.3.5 Programmable Frequency Out [1204-13, -2F, -30] 387
5.2.3.6 Programmable Square Wave Out [1204-17] 392
5.2.3.7 Simulcast (CTCSS/Data Clock) [1204-14] 396
5.2.4 Telecom Option Cards 403
5.2.4.1 T1/E1 Out [1204-09, -0A] 404
5.2.5 Time Code Option Cards 409
5.2.5.1 IRIG Out [1204-15, -1E, -22] 409
5.2.5.2 IRIG In/Out [1204-05, -27] 415
5.2.5.3 STANAG Out [1204-11, -25] 428
5.2.5.4 STANAG In [1204-1D, -24] 435
5.2.5.5 HAVE QUICK Out [1204-10, -1B] 443
5.2.5.6 HAVE QUICK In/Out [1204-29] 449
5.2.5.7 ASCII Time Code In/Out [1204-02, -04] 455
5.2.6 Network Interface Option Cards 467
5.2.6.1 Gigabit Ethernet [1204-06] 467
5.2.6.2 PTP Grandmaster [1204-32] 469
5.2.7 Miscellaneous Option Cards 485
5.2.7.1 GNSS Receiver [1204-43, -44] 485
5.2.7.2 STL Option Module [1204-3E] 486
5.2.7.3 Alarm Relay Out [1204-0F] 495
5.2.7.4 Revertive Selector Card [1204-2E] 500
5.2.7.5 Event Broadcast [1204-23] 501
5.2.7.6 Bi-Directional Communication, RS-485 [1204-0B] 509
5.3 Command-Line Interface 512
5.3.1 Setting up a Terminal Emulator 512
5.3.2 CLICommands 513
5.4 Time Code Data Formats 518
5.4.1 NMEA GGA Message 518
5.4.2 NMEA RMC Message 519
5.4.3 NMEA ZDA Message 520
5.4.4 Spectracom Format 0 520
5.4.5 Spectracom Format 1 521
5.4.6 Spectracom Format 1S 523
5.4.7 Spectracom Format 2 524
5.4.8 Spectracom Format 3 527
5.4.9 Spectracom Format 4 528
5.4.10 Spectracom Format 7 530
XII SecureSync User Reference Guide • TABLE OF CONTENTS

5.4.11 Spectracom Format 8 531
5.4.12 Spectracom Format 9 532
5.4.12.1 Format 9S 533
5.4.13 Spectracom Epsilon Formats 534
5.4.13.1 Spectracom Epsilon TOD1 534
5.4.13.2 Spectracom Epsilon TOD3 534
5.4.14 BBC Message Formats 535
5.4.14.1 Format BBC-01 535
5.4.14.2 Format BBC-02 536
5.4.14.3 Format BBC-03 PSTN 537
5.4.14.4 Format BBC-04 539
5.4.14.5 Format BBC-05 (NMEA RMC Message) 540
5.4.15 GSSIP Message Format 540
5.4.16 EndRun Formats 541
5.4.16.1 EndRun Time Format 541
5.4.16.2 EndRunX (Extended) Time Format 542
5.5 IRIG Standards and Specifications 543
5.5.1 About the IRIG Output Resolution 543
5.5.2 IRIG Carrier Frequencies 544
5.5.3 IRIG B Output 548
5.5.3.1 FAA IRIG B Code Description 551
5.5.4 IRIG E Output 554
5.5.5 IRIG Output Accuracy Specifications 558
5.6 Technical Support 559
5.6.1 Regional Contact 560
5.7 Return Shipments 560
5.8 License Notices 560
5.8.1 NTPv4.2.6p5 560
5.8.2 OpenSSH 564
5.8.3 OpenSSL 567
5.9 List of Tables 571
5.10 List of Images 573
5.11 Document Revision History 575
INDEX
SecureSync User Reference Guide • TABLE OF CONTENTS XIII

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XIV SecureSync User Reference Guide • TABLE OF CONTENTS

CHAPTER 1•SecureSync User Reference Guide 1
CHAPTER 1
Product Description
The Chapter presents an overview of the SecureSync Time and Fre-
quency Synchronization System, its capabilities, main technical fea-
tures and specifications.
The following topics are included in this Chapter:
1.1 Getting Started 2
1.2 SecureSync Introduction 2
1.3 SecureSync Front Panel 3
1.4 Unit Rear Panel 7
1.5 Option Cards 8
1.6 The SecureSync Web UI 18
1.7 Specifications 22
1.8 Regulatory Compliance 27

1.1 Getting Started
Welcome to the SecureSync User Reference Guide.
Where to start:
First-time users: "SecureSync Introduction" below.
Users with some knowledge of Time and Frequency Servers: "Overview" on page30.
If your unit is up and running and you want to change a setting: "Managing Time" on
page145, or "System Administration" on page235.
1.2 SecureSync Introduction
SecureSync®is a security-hardened 1-rack unit network appliance designed to meet rigorous
network security standards and best practices. It ensures accurate timing through multiple ref-
erences, tamper-proof management, and extensive logging. Robust network protocols are used
to allow for easy but secure configuration. Features can be enabled or disabled based on your
network policies. Installation is aided by DHCP (IPv4), AUTOCONF (IPv6), and a front-panel
keypad and LCD display.
The unit supports multi-constellation GNSS input (SAASM GPS receivers, supporting L1/L2,
available for authorized users and required for the US DoD are available), IRIG input and
other input references. The unit is powered by AC on an IEC60320 connector. DC power as
back-up to AC power, or as the primary input power source, is also available.
SecureSync combines Spectracom’s precision master clock technology and secure network-cent-
ric approach with a compact modular hardware design to bring you a powerful time and fre-
quency reference system at the lowest cost of ownership. Military and commercial applications
alike will benefit from its extreme reliability, security, and flexibility for synchronizing critical
operations.
An important advantage of SecureSync is its unique rugged and flexible modular chassis that
can be configured for your specific needs. Built-in time and frequency functions are extended
with up to six input/output modules.
You can choose from a variety of configurable option cards, each with an assortment of
input/output timing signal types and quantity, including additional 1PPS, 10 MHz, timecode
(IRIG, ASCII, HAVE QUICK), other frequencies (5MHz, 2.048MHz, 1.544MHz, 1MHz), Pre-
cision Timing Protocol (PTP) input/output, multi-Gigabit Ethernet (10/100/1000Base-T),
2CHAPTER 1•SecureSync User Reference Guide Rev. 26
1.1 Getting Started

telecom T1/E1 data rates and multi-network NTP, allowing SecureSync to be customized for
your exact requirements.
A variety of internal oscillators is available, depending on your requirements for holdover cap-
ability and phase noise.
Note: Some of the features described are not available on all SecureSync vari-
ants.
1.2.1 SecureSync's Inputs and Outputs
SecureSync provides multiple outputs for use in networked devices and other synchronized
devices. A 1-Pulse-Per-Second (1PPS) output acts as a precise metronome, counting off seconds
of System Time in the selected timescale (such as UTC, TAI or GPS). A 10MHz frequency ref-
erence provides a precise, disciplined signal for control systems and transmitters.
SecureSync's outputs are driven by its inputs – most notably, Global Navigation Satellite Sys-
tem (GNSS), or IRIG signal generators and other available input references. GNSS-equipped
SecureSyncs can track up to 72 GNSS satellites simultaneously and synchronize to the satellite’s
atomic clocks. This enables SecureSync-equipped computer networks to synchronize anywhere
on the planet.
1.3 SecureSync Front Panel
The front panel of a SecureSync unit consists of:
three separate illuminated status LEDs
a front panel control keypad
an LED time display
an LCD information display
an RS-232 serial interface
and a temperature controlled cooling fan.
The LCD information display is configurable using the SecureSync web user interface (also
referred to as the “Web UI”) or the front panel controls. Display options include status or pos-
ition information, time, date, DOY (Day of Year), GNSS information, as well as network set-
tings and SAASM key status (available with the SAASM GPS receiver option only). The RS-232
serial interface and the front panel controls provide a means of configuring the unit’s network
settings and perform other functions without requiring access to the Web UI.
SecureSync units with the SAASM GPS receiver option module installed also have an encryp-
tion key fill connector and key zeroize switch on the left-hand side of the front panel.
1.3 SecureSync Front Panel
CHAPTER 1•SecureSync User Reference Guide Rev. 26 3

Figure 1-1: SecureSync front panel layout (SAASM version)
1.3.1 Front Panel Keypad, and Display
To simplify operation and to allow local access to SecureSync, a keypad and a 4-line LCD
information display are provided on the front panel of the unit.
The front panel keypad and display can be used to configure basic network settings e.g., en-
/disabling DHCP, or setting an IP address and subnet mask.
Note: If the keypad be locked, see "Troubleshooting – Keypad Is Locked" on
page341.
1.3.1.1 Using the Keypad
The functions of the six keys are:
tu arrow keys: Navigate to a menu option (will be highlighted)
pq arrow keys: Scroll through parameter values in edit displays
üENTER key: Select a menu option, or load a parameter when editing
ÒBACK key: Return to previous display or abort an edit process
1.3.1.2 Navigating the Front Panel Display
After power initialization, press any key to go to the “Home” display. As shown in the illus-
tration "Front panel menu tree" on the facing page, several status and setup displays are
4CHAPTER 1•SecureSync User Reference Guide Rev. 26
1.3 SecureSync Front Panel