Orolia NetClock/GPS 9283 Instruction manual

Add to my manuals
216 Pages

advertisement

Orolia  NetClock/GPS 9283  Instruction manual | Manualzz

NETCLOCK/GPS

MODEL 9283

INSTRUCTION MANUAL

95 Methodist Hill Drive

Rochester, NY 14623

Phone: US +1.585.321.5800

Fax: US +1.585.321.5219 www.spectracomcorp.com

Part Number 1142-5000-0050

Manual Rev. F

21 April 2008

Copyright © 2007 Spectracom Corporation. The contents of this publication may not be reproduced in any form without the written permission of Spectracom Corporation . Printed in USA.

Specifications subject to change or improvement without notice.

Spectracom, NetClock, Ageless, TimeGuard, TimeBurst, TimeTap, LineTap, MultiTap, VersaTap, and

Legally Traceable Time are Spectracom registered trademarks. All other products are identified by trademarks of their respective companies or organizations.

All rights reserved.

SPECTRACOM LIMITED WARRANTY

LIMITED WARRANTY

Spectracom warrants each new product manufactured and sold by it to be free from defects in software, material, workmanship, and construction, except for batteries, fuses, or other material normally consumed in operation that may be contained therein AND AS

NOTED BELOW, for five years after shipment to the original purchaser (which period is referred to as the “warranty period”).

This warranty shall not apply if the product is used contrary to the instructions in its manual or is otherwise subjected to misuse, abnormal operations, accident, lightning or transient surge, repairs or modifications not performed by Spectracom.

The GPS receiver is warranted for one year from date of shipment and subject to the exceptions listed above. The power adaptor, if supplied, is warranted for one year from date of shipment and subject to the exceptions listed above.

THE ANALOG CLOCKS ARE WARRANTED FOR ONE YEAR

FROM DATE OF SHIPMENT AND SUBJECT TO THE EXCEPTIONS

LISTED ABOVE.

THE TIMECODE READER/GENERATORS ARE WARRANTED FOR

ONE YEAR FROM DATE OF SHIPMENT AND SUBJECT TO THE

EXCEPTIONS LISTED ABOVE.

The Rubidium oscillator, if supplied, is warranted for two years from date of shipment and subject to the exceptions listed above.

All other items and pieces of equipment not specified above, including the antenna unit, antenna surge suppressor and antenna pre-amplifier are warranted for 5 years, subject to the exceptions listed above.

WARRANTY CLAIMS

Spectracom’s obligation under this warranty is limited to in-factory service and repair, at Spectracom’s option, of the product or the component thereof, which is found to be defective. If in

Spectracom’s judgment the defective condition in a Spectracom product is for a cause listed above for which Spectracom is not responsible, Spectracom will make the repairs or replacement of components and charge its then current price, which buyer agrees to pay.

Spectracom shall not have any warranty obligations if the procedure for warranty claims is not followed. Users must notify

Spectracom of the claim with full information as to the claimed defect. Spectracom products shall not be returned unless a return authorization number is issued by Spectracom.

Spectracom products must be returned with the description of the claimed defect and identification of the individual to be contacted if additional information is needed. Spectracom products must be returned properly packed with transportation charges prepaid.

Shipping expense: Expenses incurred for shipping Spectracom products to and from Spectracom (including international customs fees) shall be paid for by the customer, with the following exception. For customers located within the United States, any product repaired by Spectracom under a “warranty repair” will be shipped back to the customer at Spectracom’s expense unless special/faster delivery is requested by customer.

Spectracom highly recommends that prior to returning equipment for service work, our technical support department be contacted to provide trouble shooting assistance while the equipment is still installed. If equipment is returned without first contacting the support department and “no problems are found” during the repair work, an evaluation fee may be charged.

EXCEPT FOR THE LIMITED WARRANTY STATED ABOVE,

SPECTRACOM DISCLAIMS ALL WARRANTIES OF ANY KIND

WITH REGARD TO SPECTRACOM PRODUCTS OR OTHER

MATERIALS PROVIDED BY SPECTRACOM, INCLUDING

WITHOUT LIMITATION ANY IMPLIED WARRANTY OR

MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE.

Spectracom shall have no liability or responsibility to the original customer or any other party with respect to any liability, loss, or damage caused directly or indirectly by any Spectracom product, material, or software sold or provided by Spectracom, replacement parts or units, or services provided, including but not limited to any interruption of service, excess charges resulting from malfunctions of hardware or software, loss of business or anticipatory profits resulting from the use or operation of the Spectracom product or software, whatsoever or howsoever caused. In no event shall

Spectracom be liable for any direct, indirect, special or consequential damages whether the claims are grounded in contract, tort (including negligence), or strict liability.

EXTENDED WARRANTY COVERAGE

Extended warranties can be purchased for additional periods beyond the standard five-year warranty. Contact Spectracom no later than the last year of the standard five-year warranty for extended coverage.

SPECTRACOM 95 Methodist Hill Drive Rochester, NY 14623

+1.585.321.5800 FAX: +1.585.321.5218 www.spectracomcorp.com [email protected]

This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to

Part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates, uses, and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference will not occur in a particular installation. If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of the following measures:

-- Reorient or relocate the receiving antenna.

-- Increase the separation between the equipment and receiver.

-- Connect the equipment into an outlet on a circuit different from that to which the receiver is connected.

-- Consult the dealer or an experienced radio/TV technician for help.

Spectracom Corporation Model 9283

Table of Contents

1 GENERAL INFORMATION..................................................................................1-1

1.1

Introduction.................................................................................................................................................. 1-1

1.2

Warranty Information and Customer Support .............................................................................................. 1-2

1.3

Inspection .................................................................................................................................................... 1-3

1.3.1

Inventory...................................................................................................................................................... 1-3

1.4

Specifications............................................................................................................................................... 1-4

1.4.1

Receiver....................................................................................................................................................... 1-4

1.4.2

RS-232 Serial Setup Interface Port.............................................................................................................. 1-4

1.4.3

10/100 Ethernet Port.................................................................................................................................... 1-4

1.4.4

Protocols Supported .................................................................................................................................... 1-4

1.4.5

RS-232 Communication Port ....................................................................................................................... 1-5

1.4.6

RS-485 Output............................................................................................................................................. 1-5

1.4.7

Front Panel Display ..................................................................................................................................... 1-5

1.4.8

Front Panel LED Indicators.......................................................................................................................... 1-6

1.4.9

Relay Outputs.............................................................................................................................................. 1-6

1.4.10

IRIG Output.................................................................................................................................................. 1-6

1.4.11

1PPS Output................................................................................................................................................ 1-7

1.4.12

Frequency Output ........................................................................................................................................ 1-7

1.4.13

Input Power.................................................................................................................................................. 1-7

1.4.14

Mechanical and Environmental.................................................................................................................... 1-8

2 INSTALLATION ..................................................................................................2-1

2.1

Summary ..................................................................................................................................................... 2-1

2.2

Required Tools and Cables ......................................................................................................................... 2-4

2.3

Power and Ground Connection ................................................................................................................... 2-4

2.4

Rack Mounting............................................................................................................................................. 2-5

2.5

GPS Antenna Installation............................................................................................................................. 2-5

2.5.1

Antenna Cable for Outdoor Antenna............................................................................................................ 2-5

2.5.2

Cable Lengths.............................................................................................................................................. 2-6

2.5.3

Model 8224 GPS Splitter ............................................................................................................................. 2-7

2.5.4

Model 8226 Impulse Suppressor ................................................................................................................. 2-7

2.5.5

Model 8227 GPS Inline Amplifier................................................................................................................. 2-8

2.6

Ethernet Network Cabling............................................................................................................................ 2-9

2.6.1

Optional CNC3000 Cable Kit ....................................................................................................................... 2-9

2.7

Remote Port and Serial Comm Port Output Pin-outs and Wiring .............................................................. 2-10

2.7.1

Serial Comm Ports..................................................................................................................................... 2-10

2.7.2

RS-485 Remote Port ................................................................................................................................. 2-11

2.7.3

Remote Output Usage ............................................................................................................................... 2-12

2.7.4

RS-485 Guidelines and Cable Selection.................................................................................................... 2-12

2.7.5

Connection Method.................................................................................................................................... 2-13

2.7.6

Termination................................................................................................................................................ 2-17

3 PRODUCT CONFIGURATION.............................................................................3-1

3.1

Network Configuration with DHCP............................................................................................................... 3-2

3.2

Initial Network Configuration........................................................................................................................ 3-5

3.2.1

Using HyperTerminal to Connect to the Netclock ........................................................................................ 3-5

3.2.2

Initial Network Setup.................................................................................................................................. 3-10

3.2.3

Default and Recommended Configurations............................................................................................... 3-13

3.3

Issuing the HALT Command before Removing Power .............................................................................. 3-14

NetClock/GPS Instruction Manual iii

Model 9283 Spectracom Corporation

3.3.1

Issuing the HALT Command through the Web UI...................................................................................... 3-14

3.3.2

Issuing the HALT Command through the CLI ............................................................................................ 3-16

3.3.3

Issuing the HALT Command through SNMP ............................................................................................. 3-17

3.4

Product Configuration using the WEB UI................................................................................................... 3-20

3.4.1

Configuring NTP ........................................................................................................................................ 3-20

3.4.2

NTP Support.............................................................................................................................................. 3-28

3.4.3

Configuring the Interface ........................................................................................................................... 3-29

3.4.4

Sysplex Timing .......................................................................................................................................... 3-44

3.4.5

Configuring the System: SNMP ................................................................................................................. 3-45

3.4.6

Configuring Alarms .................................................................................................................................... 3-48

3.4.7

Configuring GPS........................................................................................................................................ 3-49

3.4.8

Configuring System Time and Local Clocks .............................................................................................. 3-51

3.4.9

Setting the System Mode........................................................................................................................... 3-58

3.4.10

Activating System Options and Rolling Back Updates............................................................................... 3-59

3.4.11

Rebooting the System ............................................................................................................................... 3-61

3.4.12

Configuring System Holdover .................................................................................................................... 3-61

3.4.13

Configuring System Logs........................................................................................................................... 3-64

3.4.14

Configuring and Testing Relays................................................................................................................. 3-66

3.4.15

Configuring Network Security .................................................................................................................... 3-75

3.4.16

If You Cannot Access a Secure NetClock ................................................................................................. 3-87

3.4.17

Configuring User Accounts ........................................................................................................................ 3-88

3.4.18

Configuring SNMP v1, v2, and v3.............................................................................................................. 3-91

3.4.19

Configuring LDAP and RADIUS................................................................................................................. 3-95

3.4.20

Configuring IPSec...................................................................................................................................... 3-99

3.4.21

Logs and Status Reporting ...................................................................................................................... 3-110

4 OPERATION.......................................................................................................4-1

4.1

Front Panel .................................................................................................................................................. 4-1

4.1.1

Status Indicator............................................................................................................................................ 4-1

4.2

Rear Panel................................................................................................................................................... 4-2

4.2.1

Event and Alarm Relay Outputs................................................................................................................... 4-4

4.3

Leap Second occurrence............................................................................................................................. 4-5

4.3.1

Reasons for a Leap Second Correction....................................................................................................... 4-5

4.3.2

Leap Second Alert Notification .................................................................................................................... 4-5

4.3.3

Sequence of a Leap Second Correction Being Applied............................................................................... 4-6

5 SERIAL DATA FORMATS.....................................................................................5-1

5.1

Format 0 ...................................................................................................................................................... 5-1

5.2

Format 1 ...................................................................................................................................................... 5-2

5.3

Format 2 ...................................................................................................................................................... 5-3

5.4

Format 3 ...................................................................................................................................................... 5-5

5.5

Format 4 ...................................................................................................................................................... 5-6

5.6

Format 7 ...................................................................................................................................................... 5-7

5.7

Format 8 ...................................................................................................................................................... 5-8

5.8

Format 90 .................................................................................................................................................... 5-9

6 SERIAL SETUP INTERFACE COMMANDS ............................................................6-1

6.1

time.............................................................................................................................................................. 6-1

6.2

reboot........................................................................................................................................................... 6-1

6.3

log................................................................................................................................................................ 6-2

6.4

option........................................................................................................................................................... 6-2

6.5

ltc ................................................................................................................................................................. 6-3

6.6

net................................................................................................................................................................ 6-3

6.7

sys ............................................................................................................................................................... 6-3 iv NetClock/GPS Instruction Manual

Spectracom Corporation Model 9283

6.8

mdo.............................................................................................................................................................. 6-4

6.9

ser................................................................................................................................................................ 6-4

6.10

rem .............................................................................................................................................................. 6-4

6.11

irig................................................................................................................................................................ 6-5

6.12

frq ................................................................................................................................................................ 6-5

7 OPTIONS ...........................................................................................................7-1

7.1

Option 03: Modem ....................................................................................................................................... 7-1

7.1.1

Option 03 Basics.......................................................................................................................................... 7-1

7.1.2

Modem Installation....................................................................................................................................... 7-2

7.1.3

Modem Configuration .................................................................................................................................. 7-2

7.1.4

ACTS Server Mode...................................................................................................................................... 7-5

7.1.5

Modem Dial-Out Setup ................................................................................................................................ 7-9

7.1.6

Modem Dialout........................................................................................................................................... 7-10

7.1.7

Modem Testing.......................................................................................................................................... 7-14

7.1.8

Verify Modem Operation............................................................................................................................ 7-16

7.2

Option 04: Rubidium Oscillator .................................................................................................................. 7-19

7.2.1

Comparison of the Rubidium oscillator to the OCXO and standard TCXO oscillators:.............................. 7-19

7.3

Option 05: OCXO Oscillator....................................................................................................................... 7-20

7.3.1

Comparison of the OCXO to the Rubidium and Standard TCXO oscillators: ............................................ 7-20

7.4

Option 06: IRIG Input & IPPS Input ........................................................................................................... 7-21

7.4.1

IRIG Input Specifications ........................................................................................................................... 7-21

7.4.2

1PPS Input Specifications ......................................................................................................................... 7-21

7.4.3

IRIG Input Setup........................................................................................................................................ 7-21

7.4.4

1PPS Input................................................................................................................................................. 7-22

8 LICENSE NOTICES ..............................................................................................8-1

List of Figures

Figure 2-1: Cabling without Inline Amplifier............................................................................................................... 2-6

Figure 2-2: Cabling with Inline Amplifier.................................................................................................................... 2-7

Figure 2-3: Model 8226 Impulse Suppressor ............................................................................................................ 2-8

Figure 2-4: Model 8227 Inline Amplifier .................................................................................................................... 2-8

Figure 2-5: Serial Port Pin Configuration ................................................................................................................ 2-10

Figure 2-6: Remote Outputs.................................................................................................................................... 2-11

Figure 2-7: RS-485 Output...................................................................................................................................... 2-11

Figure 2-8: One-Way Bus Installation ..................................................................................................................... 2-13

Figure 2-9: Split Bus Configuration ......................................................................................................................... 2-14

Figure 2-10: Wire Strain Relief................................................................................................................................ 2-15

Figure 2-11: TimeView RS-485 Interface................................................................................................................ 2-15

Figure 2-12: Model 8179T TimeTap RS-485 Interface............................................................................................ 2-16

Figure 2-13: Model 9288 RS-485 Interface............................................................................................................. 2-16

Figure 2-14: TimeBurst RS-485 Interface ............................................................................................................... 2-17

Figure 3-1: Entering to the Configuration in the Web UI ........................................................................................... 3-1

Figure 3-2: Web Browser User Interface (Web UI) ................................................................................................... 3-2

Figure 3-3: Security – Network Screen (1 of 2)......................................................................................................... 3-3

Figure 3-4: Security – Network Screen (2 of 2)......................................................................................................... 3-4

Figure 3-5: Establishing a New Terminal Connection ............................................................................................... 3-5

Figure 3-6: Connecting to the Computer’s Serial Port............................................................................................... 3-6

Figure 3-7: Configuring the Serial Port Connection Properties ................................................................................. 3-6

Figure 3-8: Spectracom NetClock Command Line Interface (CLI)............................................................................ 3-7

NetClock/GPS Instruction Manual v

Model 9283 Spectracom Corporation

Figure 3-9: Available CLI Commands ....................................................................................................................... 3-8

Figure 3-10: Serial Port Pin Configuration ................................................................................................................ 3-9

Figure 3-11: Net Commands................................................................................................................................... 3-10

Figure 3-12: Prompt for Initial Configuration Values in the CLI ............................................................................... 3-10

Figure 3-13: Initial Configuration using the CLI....................................................................................................... 3-11

Figure 3-14: Successful Completion of Network Configuration............................................................................... 3-12

Figure 3-15: System Reboot/Halt Screen (1 of 3) .................................................................................................... 3-14

Figure 3-16: System Reboot/Halt Screen (2 of 3) .................................................................................................... 3-15

Figure 3-17: System Reboot/Halt Screen (3 of 3) .................................................................................................... 3-15

Figure 3-18: Command Line Interface (CLI) ............................................................................................................ 3-16

Figure 3-19: Halting the System from the CLI.......................................................................................................... 3-16

Figure 3-20: Rebooting the System from the CLI..................................................................................................... 3-17

Figure 3-21: Reboot MIB Location Options (SNMP) ................................................................................................ 3-17

Figure 3-22: Rebooting the Unit through SNMP....................................................................................................... 3-18

Figure 3-23: Halting the Unit through SNMP............................................................................................................ 3-19

Figure 3-24: Successful Halt.................................................................................................................................... 3-19

Figure 3-15: Web UI Primary Menu ........................................................................................................................ 3-20

Figure 3-26: Web UI NTP Menu............................................................................................................................... 3-20

Figure 3-27: NTP General Screen ........................................................................................................................... 3-21

Figure 3-28: NTP References Screen (1 of 2).......................................................................................................... 3-23

Figure 3-29: NTP References Screen (2 of 2).......................................................................................................... 3-24

Figure 3-30: NTP Symmetrical Keys Screen............................................................................................................ 3-25

Figure 3-31: NTP Autokey Screen ........................................................................................................................... 3-26

Figure 3-32: Statistics FTP Screen .......................................................................................................................... 3-27

Figure 3-33: NTP Status Screen .............................................................................................................................. 3-28

Figure 3-24: Interface Menu.................................................................................................................................... 3-29

Figure 3-25: Interface Serial Port 1 Screen............................................................................................................. 3-30

Figure 3-26: Interface Remote Port 2 Screen ......................................................................................................... 3-31

Figure 3-27: Interface IRIG Screen ......................................................................................................................... 3-32

Figure 3-28: IRIG Output Level............................................................................................................................... 3-34

Figure 3-29: IRIG B Time Code description ............................................................................................................ 3-35

Figure 3-30: IRIG E Time Code Description............................................................................................................ 3-39

Figure 3-31: Interface Front Panel Display Screen ................................................................................................. 3-41

Figure 3-32: Interface Frequency Output Screen.................................................................................................... 3-42

Figure 3-33: Interface Set to Defaults Screen......................................................................................................... 3-43

Figure 3-34: Configuring Serial Port 1 for Sysplex Timing ....................................................................................... 3-44

Figure 3-35: System Menu...................................................................................................................................... 3-45

Figure 3-36: System SNMP Screen ........................................................................................................................ 3-46

Figure 3-37: Spectracom’s MIB............................................................................................................................... 3-47

Figure 3-38: System Alarm Screen ......................................................................................................................... 3-48

Figure 3-39: System GPS Screen........................................................................................................................... 3-50

Figure 3-40: System Time Screen .......................................................................................................................... 3-51

Figure 3-41: Local System Clock Screen (1 of 3).................................................................................................... 3-52

Figure 3-42: Local System Clock Screen (2 of 3).................................................................................................... 3-53

Figure 3-43: Local System Clock Screen (3 of 3).................................................................................................... 3-54

Figure 3-44: System Mode Screen ......................................................................................................................... 3-59

Figure 3-45: System Update Screen....................................................................................................................... 3-60

Figure 3-46: System Reboot Screen....................................................................................................................... 3-61

Figure 3-47: System Holdover Screen .................................................................................................................... 3-62

Figure 3-48: System Log Configuration Screen (1 of 2).......................................................................................... 3-64

Figure 3-49: System Log Configuration Screen (2 of 2).......................................................................................... 3-65 vi NetClock/GPS Instruction Manual

Spectracom Corporation Model 9283

Figure 3-50: Relay Menu......................................................................................................................................... 3-66

Figure 3-51: Relay Output Screen .......................................................................................................................... 3-67

Figure 3-52: Event Timer Relay Screen.................................................................................................................. 3-68

Figure 3-53: Edit/View Event Timers....................................................................................................................... 3-69

Figure 3-54: Relay Current Event Scheduler Screen.............................................................................................. 3-71

Figure 3-55: Relay Reset ALL Event Timers Screen .............................................................................................. 3-72

Figure 3-56: Set Event Clock Screen...................................................................................................................... 3-73

Figure 3-57: Test Relays Screen ............................................................................................................................ 3-74

Figure 3-58: Security Menu...................................................................................................................................... 3-75

Figure 3-59: Security Network Screen (1 of 2)......................................................................................................... 3-76

Figure 3-60: Security Network Screen (2 of 2)......................................................................................................... 3-77

Figure 3-61: Security SSH Screen (1 of 2)............................................................................................................... 3-78

Figure 3-62: Security SSH Screen (2 of 2)............................................................................................................... 3-79

Figure 3-63: Security HTTPS Screen (1 of 2) .......................................................................................................... 3-84

Figure 3-64: Security HTTPS Screen (2 of 2) .......................................................................................................... 3-85

Figure 3-65: Security User Account Screen............................................................................................................. 3-88

Figure 3-66: Security User Account Screen (Assigning Privileges) ......................................................................... 3-90

Figure 3-67: SNMP Security Screen (1 of 3)............................................................................................................ 3-91

Figure 3-68: SNMP Security Screen (2 of 3)............................................................................................................ 3-92

Figure 3-69: SNMP Security Screen (3 of 3)............................................................................................................ 3-93

Figure 3-70: Security LDAP General Screen ........................................................................................................... 3-94

Figure 3-71: Security LDAP Client Configuration Screen (1 of 2) ............................................................................ 3-95

Figure 3-72: Security LDAP Client Configuration Screen (2 of 2) ............................................................................ 3-96

Figure 3-73: Security RADIUS General Screen ....................................................................................................... 3-97

Figure 3-74: Security RADIUS Client Configuration Screen .................................................................................... 3-98

Figure 3-75: IPSEC IKE SA Configuration Screen (1 of 2) .................................................................................... 3-100

Figure 3-76: IPSEC IKE SA Configuration Screen (2 of 2) .................................................................................... 3-101

Figure 3-77: IPSec General Screen ....................................................................................................................... 3-104

Figure 3-78: IPSec Manual SA Configuration (1 of 2)............................................................................................ 3-106

Figure 3-79: IPSec Manual SA Configuration (2 of 2)............................................................................................ 3-107

Figure 3-80: IPSec General Screen ....................................................................................................................... 3-108

Figure 3-81: Status and Log Menu........................................................................................................................ 3-110

Figure 3-82: Alarm Log Screen ............................................................................................................................. 3-111

Figure 3-83: Authorization Log Screen ................................................................................................................. 3-112

Figure 3-84: Event Log Screen ............................................................................................................................. 3-113

Figure 3-85: GPS Qualification Log Screen .......................................................................................................... 3-114

Figure 3-86: Journal Log Screen........................................................................................................................... 3-115

Figure 3-87: NTP Log Screen ............................................................................................................................... 3-116

Figure 3-88: IKE Log Screen.................................................................................................................................. 3-117

Figure 3-89: Operational Log Screen.................................................................................................................... 3-118

Figure 3-90: Oscillator Log Screen ....................................................................................................................... 3-119

Figure 3-91: System Log Screen .......................................................................................................................... 3-120

Figure 3-92: Update Log Screen........................................................................................................................... 3-121

Figure 3-93: GPS Signal Status Screen................................................................................................................ 3-122

Figure 3-94: NTP Status Screen ........................................................................................................................... 3-124

Figure 3-95: System Status Screen (1 of 2).......................................................................................................... 3-125

Figure 3-96: System Status Screen (2 of 2).......................................................................................................... 3-126

Figure 4-1: Front Panel Display ................................................................................................................................ 4-1

Figure 4-2: NetClock Rear Panel Detail .................................................................................................................... 4-3

Figure 4-3: Event and Alarm Relay Contacts............................................................................................................ 4-4

Figure 7-1: System Modem Configuration Screen, Console Mode ........................................................................... 7-3

NetClock/GPS Instruction Manual vii

Model 9283 Spectracom Corporation

Figure 7-2: System Modem Configuration Screen, Client Mode ............................................................................... 7-4

Figure 7-3: ACTS Server Mode Selected................................................................................................................... 7-5

Figure 7-4: ACTS Server Greeting............................................................................................................................. 7-7

Figure 7-5: ACTS Server Statistics ............................................................................................................................ 7-8

Figure 7-6: ACTS Server Log..................................................................................................................................... 7-9

Figure 7-7: System Modem Dial Out Screen (1 of 2) .............................................................................................. 7-11

Figure 7-8: System Modem Dial Out Screen (2 of 2) .............................................................................................. 7-12

Figure 7-9: System Modem Calibrate Screen ......................................................................................................... 7-13

Figure 7-10: Modem Test Screen ........................................................................................................................... 7-15

Figure 7-11: Modem Dialout Log Screen ................................................................................................................ 7-17

Figure 7-12: IRIG Input Screen................................................................................................................................ 7-22

Figure 7-13: System Status Screen (1PPS Input Indicated) .................................................................................... 7-23

Underwriters Laboratory (UL) has not tested the performance or reliability of the Global Positioning System (GPS) hardware, operating software, or other aspects of this product. UL has only tested for fire, shock, or casualties as outlined in UL’s Standard(s) for Safety for

Information Technology Equipment, UL60950-1. UL Certification does not cover the performance or reliability of the GPS hardware and GPS operating software.

UL MAKES NO REPRESENTATIONS, WARRANTIES, OR CERT-

IFICATIONS WHATSOEVER REGARDING THE PERFORMANCE

OR RELIABILITY OF ANY GPS RELATED FUNCTIONS OF THIS

PRODUCT. viii NetClock/GPS Instruction Manual

Spectracom Corporation Model 9283

1 General Information

Spectracom Corporation is a leading manufacturer of precise time-keeping devices used to synchronize critical operations. Our products provide accurate, reliable, Legally Traceable

Time™ across your networks. The Spectracom 9200 series NetClock™ is a direct response to customer needs for affordable time synchronization equipment that includes a variety of necessary and widely used security, authentication, and networking features.

1.1 Introduction

The Model 9283 NetClock/GPS time server provides disciplined timing using Network Time

Protocol (NTP). The NetClock meets or exceeds the National Emergency Numbers Association

(NENA) master clock standard and is ideally suited for delivering world-wide, split-second timing to mission critical systems. The 9200 series offers enhanced reliability features, including ovenstabilized crystal oscillator (OCXO) and Rubidium oscillator backups to maintain the NetClock’s time standard if the time reference is lost. An optional dial-out modem provides additional backup to GPS and can function as the primary reference if desired.

Spectracom NetClocks are based on Global Positioning System (GPS) technology – tracking up to twelve satellites simultaneously and synchronized to their atomic clocks. This enables

NetClock-equipped computer networks to synchronize all elements of network hardware and software (including system logs) over LANs or WANs – anywhere on the planet.

The 9293 uses the Linux v2.6 operating system and features a high-speed processor. A variety of time code outputs are included to meet the requirements of numerous systems, including a

10/100 Base-T LAN port, two RS-232 serial ports, two RS-485 data bus ports, and IRIG B/E

AM/TTL. Frequency outputs of 1 PPS and 10 MHZ are also provided, as are alarm outputs and programmable timer outputs. The NetClock allows users to accurately time stamp video surveillance systems, access points, card readers, time clocks, and alarm systems to provide necessary evidence and validation of events.

The 9200 series’ enhanced security features, which can be enabled and disabled by the user, include Secure Shell (SSH), Secure Sockets Layer (SSL), Secure Copy Protocol (SCP), Secure

File Transfer Protocol (SFTP), and SNMP v1, v2, and v3 with host access restriction. The

NetClock supports IPv4, IPv6, and centralized user authentication (LDAP/Active Directory,

RADIUS). NTP capabilities include peering, Stratum 2, and Autokey.

The NetClock can be configured and its reports accessed through a Web User Interface (Web

UI). A Command Line Interface (CLI) is also provided for initial product configuration through the serial setup port. Once configured, the NetClock can be accessed, under appropriate security policies, anywhere within a network. The product features browser-based remote diagnostics and control as well as Flash memory for remote software upgrades. A 10/100 Mbps

Ethernet LAN port provides support for Network Time Protocol (NTP) over a variety of platforms, including Windows 2003, 2000, and XP, Cisco, UNIX, Linux, and more. Remote control and monitoring can also be performed through SNMP and Telnet.

The NetClock also includes a GPS antenna and ancillary hardware.

NetClock/GPS Instruction Manual 1-1

Model 9283 Spectracom Corporation

1.2 Warranty Information and Customer Support

Warranty information is found on the leading pages of this manual.

Spectracom constantly strives to improve its products. We greatly appreciate any and all customer feedback.

Technical support is available by telephone at 585.321.5800. Please direct any comments or questions regarding application, operation, or service to Spectracom’s Customer Service

Department. Customer Service is available Monday through Friday from 8:00 a.m. to 5:00 p.m.

EST, excluding holidays.

Product support is also available by e-mail. Questions regarding equipment, operation, and applications may be e-mailed to Spectracom Sales Support at: [email protected]

For repairs and technical support, questions may be e-mailed to Spectracom Technicians at: [email protected]

Visit Spectracom’s web page for product information, application notes, and upgrade notices as they become available: http://www.spectracomcorp.com/

Please contact Customer Service before returning any equipment Spectracom. Customer

Service must provide you with a Return Material Authorization Number (RMA#) prior to shipment. When contacting Customer Service, please be prepared to provide your equipment serial number(s) and a description of the failure symptoms or issues you would like resolved.

Freight to Spectracom is to be prepaid by the customer.

Once you have obtained the RMA number, ship your equipment to the following address:

Spectracom Corporation

Repair Department, RMA# xxxxx

95 Methodist Hill Drive

Rochester, NY 14623

1-2 NetClock/GPS Instruction Manual

Spectracom Corporation Model 9283

1.3 Inspection

On receipt, carefully examine the carton and its contents.

CAUTION: Electronic equipment is sensitive to Electrostatic Discharge

(ESD). Observe all ESD precautions and safeguards when

handling Spectracom equipment.

Verify that all material ordered has been received by checking the carton contents against the packing list. If there is a discrepancy, please contact Spectracom Customer Service at US

585.321.5800. If there is damage to the carton resulting in damage to the unit, contact the carrier immediately. Retain the carton and packing materials in the event the carrier wishes to witness the shipping damage. Failing to report shipping damaging immediately may forfeit any claim against the carrier. In addition, notify Spectracom Corporation of shipping damage or shortages in order to obtain a replacement or repair services.

NOTE: If equipment is returned to Spectracom, it must be shipped in its original packing material. Save all packaging material for this purpose.

1.3.1 Inventory

Your Spectracom time server package ships with the following components:

Unit

User manual

CE/UL-approved power supply for international use

Standard DB9F to DB9M RS-232 cable pinned as straight thru (used for initial configuration)

AC power cord

Rack-mount kit

Rubber footpads for desktop installation

3-pin terminal block connector for RS-485 connections

10-pin terminal block connector

Jeweler’s type screwdriver (for tightening the screws on the terminal blocks)

Terminating Resistors, 120

Ω

Spectracom models that have the modem dial-out feature (Option 03) ship with a serial modem kit.

NetClock/GPS Instruction Manual 1-3

Model 9283 Spectracom Corporation

1.4 Specifications

NOTE: The specifications listed herein are based on “standard” operation, with the unit synchronized to GPS and with the GPS receiver in position hold.

1.4.1 Receiver

Received standard: L1 C/A Code transmitted at 1575.42 MHz.

Satellites tracked:

Acquisition time:

Antenna requirements:

Antenna connector:

Up to twelve simultaneously.

Typically <4 minutes from a cold start.

Active antenna module, +5V, powered by the NetClock, 16 dB gain minimum.

Type N, female.

1.4.2 RS-232 Serial Setup Interface Port

Function: Accepts commands to locally configure the IP network parameters for initial connectivity. Also used as the interface to the dial-out modem (Option 03).

Connector:

Character structure:

DB9 female, pin assignments conform to EIA/TIA-574 standard, data communication equipment.

ASCII, 9600 baud, 1 start, 8 data, 1 stop, no parity.

1.4.3 10/100 Ethernet Port

Function: 10/100 BaseT auto sensing LAN connection for NTP / SNTP and remote monitoring, diagnostics, configuration and upgrade.

NTP: NTP v4.2.0. Provides MD5 and Autokey. Stratum 1 or higher.

(RFC 1305, 4330)

Loading:

Clients supported:

~4,000 requests per second, typical.

The number of users supported depends on the class of network and the subnet mask for the network.

A gateway greatly increases the number of users.

HTTP, HTTPS Servers: For browser-based configuration and monitoring using Internet

Explorer 5 or Netscape 6 per RFC 1945 and 2068.

FTP: For remote upload of system logs and RFC 959.

Logging: Syslog

SNMP:

Telnet:

Supports v1, v2c, and v3

For limited remote configuration per RFC 854.

1-4 NetClock/GPS Instruction Manual

Spectracom Corporation Model 9283

Authentication:

Up to 32-character password, Telnet Disable, FTP Disable,

Secure SNMP, SNMP Disable, HTTPS, HTTP Disable, SCP,

SSH, SFTP.

LDAP v2 and v3, RADIUS, MD5 Passwords, NTP Autokey

Protocol.

RJ-45, Network IEEE 802.3. Connector:

1.4.5 RS-232 Communication Port

Signal: Selected time Data Format in RS-232 levels when interrogated by the connected device. This port may also be configured to provide a continuous once-per-second output.

Connector:

Character structure:

Accuracy:

DB9 female, pin assignments conform to EIA/TIA-574 standard, data communication equipment (DCE). No flow control.

ASCII, 1 start, 8 data, 1 stop, and no parity.

Configuration:

Data stream on time marker within ± 100 microseconds of UTC on

Sync in Data Formats 0, 1, 3 and 8. Data Formats 2, 4 and 7 within ±1 millisecond of UTC.

Baud rate and output Data Formats are selected using the web browser user interface. Bit rate selections are 1200, 2400, 4800 and 9600 baud. There are eight Data Format selections available.

Signal:

Connector:

Character structure:

Accuracy:

Selected time Data Format in RS-485 levels, output once-persecond.

Removable 3-position terminal block (supplied).

ASCII, 1 start, 8 data, 1 stop, and no parity.

Configuration:

Data stream on time marker within ± 100 microseconds of UTC on

Sync in Data Formats 0, 1, 3 and 8. Data Formats 2, 4 and 7 within ±1 millisecond of UTC.

Baud rate and output Data Formats are selected using the web browser user interface. Bit rate selections are 1200, 2400, 4800, and 9600 baud. There are eight Data Format selections available.

1.4.7 Front Panel Display

Display Type: Two separate illuminated LCD displays.

Display Options: Each display is configurable via the web browser user interface.

Options include time, date, day of year, software versions, network information, fonts, and date formats.

NetClock/GPS Instruction Manual 1-5

Model 9283 Spectracom Corporation

1.4.8 Front Panel LED Indicators

Power: Green, always on.

Sync: Tri-color LED indicates the time data accuracy and equipment fault.

LAN: Green: Good Link indicator.

Yellow: Network activity.

Three separate outputs provided for either Programmable Event Timer Output or Major/Minor

Alarm indication.

Relay contacts: NO, NC, and Common.

Contact rating:

Connector:

30 VDC, 2 amps.

10-position 3.81 mm terminal block (mate supplied).

Programmable Timer Output:

Major/Minor Alarms:

128 On/Off events available. Timer events that are hourly, daily or weekly only count as a single event so many events can be programmed.

Relay contacts allow remote monitoring of operational status. A power failure, CPU failure loss of time sync, etc cause the alarm relay to de-energize. The alarm relay returns to normal operation

(energized) when the fault condition is corrected.

1.4.10 IRIG Output

Signal:

AM Carrier:

AM Signal Level:

Accuracy:

Selectable IRIG B or IRIG E, amplitude modulated sine wave (AM) or pulse-width-coded (TTL/DCLS).

IRIG B-1000 Hz.

IRIG E-100 Hz or 1000 Hz.

Adjustable from 0 to 10 Vp-p mark amplitude into loads of 600 ohms. Factory set to 2.0 V p-p into 600 ohms. Output should be terminated with 600 ohms.

IRIG-B, IRIG-E 1000 Hz AM: ±20 microseconds of UTC.

IRIG-E 100 Hz AM: 200 microseconds of UTC.

IRIG-B, IRIG-E TTL/DCLS: ±2 microseconds of UTC.

Configuration: IRIG Formats B or E in AM or TTL/DCLS levels. Time data is configurable with Time Zone Offsets and DST rules. Signature

Control may also be placed on the output signal. This feature removes the modulation code from the IRIG output whenever the

1-6 NetClock/GPS Instruction Manual

Spectracom Corporation

IRIG Code Format

B000

B120

E000

E110

E120

1.4.11 1PPS Output

Signal:

Signal Level:

Pulse Width:

Accuracy:

Model 9283 selected alarm condition is present. The output is restored when the fault is corrected.

Description of code

IRIG B, TTL, BCD,CF and SBS

IRIG B, AM, 1 kHz , BCD,CF and SBS

IRIG E TTL, BCD,CF and SBS

IRIG E AM, 100 Hz, BCD,CF and SBS

IRIG E AM, 1 kHz, BCD,CF and SBS

One pulse-per-second square wave derived from the GPS receiver.

TTL compatible into high impedance loads, 1.5 V base-to-peak into 50 ohms.

200 milliseconds.

Positive edge within ± 50 nanoseconds of UTC when locked to

GPS.

1.4.12 Frequency Output

Signal Level: 700 mVrms into 50 ohms.

Oscillator Accuracy: TCXO (Standard): 1x10 -10

typical 24-hour average locked to GPS.

OCXO (Option 05): 1x10 -11

typical 24-hour average locked to

GPS, 2x10

-9

per week typical aging unlocked.

Rubidium (Option 04): 1x10 -12

typical 24-hour average locked to

GPS; 1x10

-11

per month typical aging unlocked.

Signature Control: This configurable feature removes the output signal whenever a major alarm condition or loss of time synchronization condition is present. The output is restored when the fault condition is corrected.

1.4.13 Input Power

Power source:

DC input:

NetClock/GPS Instruction Manual

90 to 240 VAC, 47 to 63 Hz through an IEC 320 universal connector.

9.5 to 30 VDC, 18 watts, through a CE/UL/CSA-approved power adapter (supplied).

1-7

Model 9283 Spectracom Corporation

Connector:

Polarity:

NOTE: Rubidium (Option 04) uses a 24 VDC nominal (+22.5 -

+30 VDC) @ 2.5 amps power supply.

Barrel, 5.5mm O.D., 2.5 mm I. D.

Negative shell, positive center.

1.4.14 Mechanical and Environmental

Dimensions: EIA 19” rack mount W x 1.75” H [1U] x 11.00” D

(483 mm W x 44 mm H x 305 mm D).

The Rubidium option (Option 04) is 3.5” H (88mm) [2U] and 8 lbs

(3.6 kg).

Weight: 6 lbs. (27 kg).

Temperature: 32

° to 122°F (0° to 50°C) operating range.

-40

° to 185°F (-40° to 85°C) storage range

Humidity: 10% - 95% relative humidity, non-condensing

1-8 NetClock/GPS Instruction Manual

Spectracom Corporation Model 9283

2 Installation

2.1 Summary

This section provides an overview summary of the installation process. The installation of the

NetClock consists of the following steps. Refer to the table of contents in this manual for specific section references detailing how these summarized steps are accomplished.

WARNING: This equipment has a connection between the earthed conductor of the DC supply circuit and the earthing conductor.

This equipment shall be connected directly to the DC supply system earthing electrode conductor or to a bonding jumper from an earthing terminal bar or bus to which the DC supply system earthing electrode conductor is connected.

This equipment shall be located in the same immediate area

(such as, adjacent cabinets) as any other equipment that has a connection between the earthed conductor of the same DC supply circuit and the earthing conductor, and also the point of earthing of the DC system. The DC system shall not be earthed elsewhere.

The DC supply source is to be located within the same premises as this equipment.

Switching or disconnected devices shall not be in the earthed circuit conductor between the DC source and the point of the

connection of the earthing electrode conductor.

CAUTION: Electronic equipment is sensitive to Electrostatic Discharge

(ESD). Observe all ESD precautions and safeguards when

handling Spectracom equipment.

CAUTION: Once power is applied to the unit, DO NOT disconnect power unless the HALT command is first issued to the NetClock.

Refer to Product Configuration for information on issuing the

HALT command.

1) If desirable, install the rack-mount ears on the two sides of the front panel and install the unit in a standard 19 inch rack cabinet.

NetClock/GPS Instruction Manual 2-1

Model 9283 Spectracom Corporation

2) Connect the NetClock’s front panel Ethernet port to an available hub/switch on the network with a standard network cable.

3) Connect the DC power input jack to a standard AC outlet with the supplied power supply.

Verify the green Good Link lamp next to the Ethernet connector illuminates.

4) From the network administrator, obtain an available static network IP address, the network subnet mask and the IP address of the immediate gateway (if installed) if the subnet must access the NetClock. This step is only necessary if you are not using DHCP.

5) Assign the IP address, net mask and gateway settings by using the rear panel Serial

Setup Interface DB9F connector interfaced to a PC with the provided serial cable (PC should be running either Microsoft HyperTerminal or ProComm). (Refer to Options for more information). This step is only necessary if you are not using DHCP.

6) Install the GPS antenna, surge suppressor, antenna cabling and GPS preamplifier if required. If using a window-mount antenna (Model 8228), place the antenna in a window that has no metallic tinting or screening in or on the glass and then place the unit in singlesatellite mode.

NOTE: The Model 9283 NetClock must be in position hold if the unit is to use a window-mount

GPS antenna. Position hold can be obtained by manually entering the GPS location or by receiving qualified GPS signal from at least four satellites at least once for a brief duration.

7) Connect the GPS cable to the rear panel antenna input jack on the back of the NetClock.

8) Verify the NetClock front panel Sync lamp illuminates green. Synchronization may take up to 20 minutes (approximately).

9) If supplied with Option 03 Dial-out Modem, connect the dial-out modem to the rear panel

Setup port. Change the console/client mode of operation to Modem using the Web User

Interface.

10) Configure the NetClock front panel LCDs as desired using the Web User Interface.

11) Interface the NetClock to wall display clocks and other peripheral devices as needed.

12) Configure each of the rear panel outputs to these devices for desired local times, baud rates and Data Formats using either the Web User Interface or the serial setup port (Each port is separately configured so each port used may need to be configured for your desired configuration).

NOTE: Unless you are using DNS in conjunction with DHCP (with the client configured using the NTP server's hostname instead of IP address), DHCP must be disabled and the

IP address must be changed to a static address once the NetClock is properly configured. Failure to do this will result in a loss of time synchronization if the DHCP server assigns a new IP address to the NetClock. Verify your setup before synchronizing the network PCs via NTP.

2-2 NetClock/GPS Instruction Manual

Spectracom Corporation Model 9283

13) Synchronize the network PCs via NTP using the Ethernet port as desired. (Refer to www.spectracomcorp.com

for assistance and refer to Table 2-1 for information regarding local time.)

14) Review your security configuration settings.

Data Output

Network Time

Protocol (NTP)

Port Available From Time Zone

Offset for Local

Time

Automatic

Daylight Saving

Time Adjustment

Capable

Ethernet port on front panel NOT AVAILABLE NO

Data Format 0

Data Format 1

Data Format 2

Remote/Serial on rear panel 00-23 Hours

Remote/Serial on rear panel +/-12:00

YES

YES

Remote/Serial on rear panel NOT AVAILABLE NO

Additional Notes

NTP is always UTC. Must set

Local time/DST correction on each PC via the Date/Time properties window.

None

None

Data Format 3

Data Format 4

Data Format 5

Data Format 7

Remote/Serial on rear panel +/-12:00 YES

Remote/Serial on rear panel NOT AVAILABLE NO

Remote/Serial on rear panel +/-12:00 YES

Remote/Serial on rear panel NOT AVAILABLE NO

Data Format 2 always reflects

UTC. It can’t be configured as local time.

None

Data Format 4 always reflects

UTC. It can’t be configured as local time.

None

Data Format 8

Data Format 90

Remote/Serial on rear panel 00-23 Hours YES

Remote/Serial on rear panel NOT AVAILABLE NO

Data Format 7 always reflects

UTC. It can’t be configured as local time.

None

Data Format 90 always reflects

UTC. It can’t be configured as local time.

IRIG B

IRIG E

IRIG port on rear panel

IRIG port on rear panel

+/-12:00

+/-12:00

YES

YES

None

None

Table 2-1: Time Zone Offsets available for Data Outputs

NetClock/GPS Instruction Manual 2-3

Model 9283 Spectracom Corporation

2.2 Required Tools and Cables

1) Phillips screwdriver to install the unit’s rack-mount ears.

2) Screwdriver to mount the unit in a standard 19-inch rack.

3) Wire strippers for the RS-485 cabling.

4) Supplied jeweler’s type screwdriver for tightening the RS-485 wiring terminal block connectors (Located in the ancillary kit).

5) RS-232 straight-thru DB9 to DB9 cable (supplied)

6) Ethernet cables (Refer to Section 2.6).

2.3 Power and Ground Connection

WARNING: This equipment has a connection between the earthed conductor of the DC supply circuit and the earthing conductor.

This equipment shall be connected directly to the DC supply system earthing electrode conductor or to a bonding jumper from an earthing terminal bar or bus to which the DC supply system earthing electrode conductor is connected.

This equipment shall be located in the same immediate area

(such as, adjacent cabinets) as any other equipment that has a connection between the earthed conductor of the same DC supply circuit and the earthing conductor, and also the point of earthing of the DC system. The DC system shall not be earthed elsewhere.

The DC supply source is to be located within the same premises as this equipment.

Switching or disconnected devices shall not be in the earthed circuit conductor between the DC source and the point of the

connection of the earthing electrode conductor.

CAUTION: Electronic equipment is sensitive to Electrostatic Discharge

(ESD). Observe all ESD precautions and safeguards when

handling Spectracom equipment.

An external AC to DC power adapter powers the NetClock.

2-4 NetClock/GPS Instruction Manual

Spectracom Corporation Model 9283

This International and US Desk Top adapter has a detachable AC power cord to an IEC

320 connector. The power adapter is shipped with a line cord compatible with AC receptacles

(NEMA 5-15R) commonly found in the United States and Canada. Alternate type line cords or adapters may be obtained locally.

The chassis ground stud allows the NetClock chassis to be connected to an earth ground or single point ground. Connecting the chassis to a single point ground system may be required in some installations to ensure optimum lightning protection. An earth ground is also recommended in installations where excessive noise on the power line degrades receiver performance.

Rack-mount ears are provided in the ancillary kit if the NetClock will be installed in a standard

19 inch rack.

2.4 Rack Mounting

To rack-mount the unit, locate the rack-mount ears. Using the rack mounting screws provided in the ancillary kit (refer to 1.3.1, Inventory), mount the ears to the sides of the unit. (If the

Netclock is to be mounted flush with the front of the rack, mount the ears to the front of the unit.)

Slide the unit into the rack and connect the ears to the rack using appropriate screws (not provided).

NOTE: Units with Option 04 are supplied with rack-mount ears specific to the Option 04 configuration. These ears are not interchangeable with those provided with NetClocks that do not have Option 04.

2.5 GPS Antenna Installation

2.5.1 Antenna Cable for Outdoor Antenna

When using the Model 8225 GPS outdoor antenna, Spectracom recommends using LMR-400 low loss type cable for the GPS antenna cable. To simplify the installation process, Spectracom offers GPS cable assemblies terminated with Type N Male connectors. Standard lengths are

10, 25, 50, 100, 150 and 200 feet.

If the antenna cable is purchased locally, select coax suitable for outdoor use. Consider the cable's weather ability, temperature range, UV resistance, and attenuation characteristics.

Do not allow the antenna cable to be placed in standing water, as water may permeate through the coax jacket over time. On flat roof installations, the coax can be suspended by cable hangers or placed in sealed PVC conduit. Apply a weather proofing sealant or tape over all outdoor connections.

Installation of a surge protection device in the antenna line is recommended to protect the

NetClock receiver and connected devices from lightning damage. Spectracom offers the Model

8226 Impulse Suppressor to shunt potentially damaging voltages on the antenna coax to ground. Refer to the Model 8226 Impulse Suppressor Section for a complete description of the

Model 8226.

NetClock/GPS Instruction Manual 2-5

Model 9283 Spectracom Corporation

The maximum recommended antenna cable length when installed without a preamplifier is 300 feet of LMR 400 or equivalent cable with a maximum attenuation (loss) of 16 dB (Figure 2-1).

When selecting alternate antenna cable sources, the attenuation characteristics at the GPS frequency of 1575.42 MHz must be known. To ensure optimum receiver performance, the total antenna cable attenuation must not exceed 16 dB regardless of cable length. Cable attenuation of greater than 16 dB requires the use of a Model 8227 Inline Amplifier (Figure 2-2).

Model 8225

Model

8226

Install the impulse suppressor between the antenna and the

NetClock.

NetClock

300’ of LMR 400 or Equivalent, Maximum

16 dB Attenuation, Maximum

Figure 2-1: Cabling without Inline Amplifier

2-6 NetClock/GPS Instruction Manual

Spectracom Corporation Model 9283

Model 8225

Model

8226

Install impulse suppressor between the antenna and the amplifier whenever possible.

5 Foot Cable Included

Model

8227

NetClock

300′ Maximum

(LMR 400)

16 dB Maximum

400′ Maximum

(LMR 400)

21 dB Maximum

450′ Minimum, 700′ Maximum

(24 dB Minimum, 37 dB Maximum)

Figure 2-2: Cabling with Inline Amplifier

2.5.3 Model 8224 GPS Splitter

The GPS Antenna Splitter, Model 8224, is designed for use with an existing antenna/cable setup. It eliminates the need and expense for a second antenna/cable run when two synchronization systems are desirable. The Model 8224 should be installed indoors.

2.5.4 Model 8226 Impulse Suppressor

Spectracom recommends the use of an inline coaxial protector for all products with an outside antenna. Spectracom offers the Model 8226, Impulse Suppressor, to protect the receiver from damaging voltages occurring on the antenna coax. Voltages exceeding the impulse suppresser trip point are shunted to the system ground. The Model 8226 is designed to withstand multiple surges.

Two LMR-400 field-installable N type connectors are provided with the Model 8226 to splice in the surge suppressor wherever it must be placed. However, the recommended method to avoid having to cut the antenna cable is to determine the desired location of the Model 8226 ahead of time and then order two lengths of pre-terminated cables instead of just one long cable that spans the entire distance between the antenna and the NetClock.

Mount the suppressor indoors, preferably where the coax enters the building. Install the suppressor on a grounding panel or bulkhead as shown in Figure 2-3.

Spectracom offers a grounding kit that includes grounding cable, clamps, mounting bracket and ground plane. The Spectracom Part Number for this kit is 8226-0002-0600. Contact our Sales department for additional information.

NetClock/GPS Instruction Manual 2-7

Model 9283

.0625 inch (15.88mm)

DIAMETER

INSTALL "O" RING

Spectracom Corporation

.203 inch (5.16mm)

DIAMETER

MOUNTING

HOLE PATTERN SINGLE POINT GROUNDING

PANEL OR BULKHEAD

Figure 2-3: Model 8226 Impulse Suppressor

Refer to the Model 8226 Manual for proper installation.

2.5.5 Model 8227 GPS Inline Amplifier

An inline amplifier is required whenever GPS antenna cable lengths cause greater than 16 dB attenuation.

The Model 8227 GPS Inline Amplifier, shown in Figure 2-3, extends the maximum cable length.

The Model 8227 provides 20 dB of gain and is powered by the NetClock receiver.

Figure 2-4: Model 8227 Inline Amplifier

Two LMR-400 field-installable N type connectors are provided with the Model 8227 to splice in the amplifier wherever it must be placed. However, the recommended method to avoid having to cut the antenna cable is to determine the desired location of the Model 8227 ahead of time and then order two lengths of pre-terminated cables instead of just one long cable that spans the entire distance between the antenna and the NetClock.

A five foot N type connector cable is also supplied with the Model 8227 to allow it to be installed after the Model 8226 surge suppressor. The Model 8227 should always be installed after the surge suppressor to prevent lightning or surge damage to the preamp.

Refer to the Model 8227 Manual for proper installation.

2-8 NetClock/GPS Instruction Manual

Spectracom Corporation Model 9283

2.6 Ethernet Network Cabling

Spectracom NetClocks provide a 10/100 Ethernet port for full NTP functionality as well as full web browser user interface enabled configuration, monitoring and diagnostic support.

The Ethernet port is provided on the front panel for easy connection to routers and hubs.

Use standard CAT 5 cable with RJ45 connectors.

When connecting to a hub or router use a straight-through wired cable.

When connecting directly to a PC, use a crossover wired cable.

2.6.1 Optional CNC3000 Cable Kit

Spectracom offers an available cable kit called the CNC3000. This kit consists of three cables:

1) Six foot RS-232 Setup port cable DB9M to DB8F for initial configuration

1) Six foot Cat 5 crossover LAN cable for direct PC connection

1) Six foot Cat 5 patch LAN cable for LAN hub link.

Contact our Sales department if you would like to obtain the CNC3000 kit.

NetClock/GPS Instruction Manual 2-9

Model 9283 Spectracom Corporation

2.7 Remote Port and Serial Comm Port Output Pin-outs and

Wiring

This section contains wiring and pin-out information for the rear panel Remote RS-485 and

Serial RS-232 Comm ports.

2.7.1 Serial Comm Ports

The rear panel of the Model 9283 has two RS-232 SERIAL COMM ports that are available to synchronize peripheral devices. These ports can provide RS-232 output data to synchronize external devices that can accept RS-232 Data Formats as an input.

The Serial Ports can provide RS-232 data in one of two modes. The Interrogation mode provides a one-time RS-232 time stamp each time that the port receives a request character from the external device. In between the requests for time, there is no output. The Multicast mode broadcasts the time stamp every second. The Interrogation mode is the factory default.

This mode should be changed to Multicast mode in the web browser user interface if the external device being synchronized does not send a request character for the time but rather just “listens” for the time to be sent every second.

The configuration of the data, including the baud rate, the Data Format, the request character in the Interrogation mode, Time Zone Offsets and Daylight Saving Time rules is chosen from the web browser user interface.

The Serial Ports have a standard RS-232 pin configuration as shown in Figure 2-5 and Table

2-2.

5 4 3 2 1

9 8 7 6

Figure 2-5: Serial Port Pin Configuration

PIN SIGNAL I/O DESCRIPTION

2

3

RXD

TXD

O

I

Receive Data (RS-232 output data to a device)

Transmit Data (RS-232 input data from a device)

6

7

8

DSR

RTS

CTS

O

*

*

Data Set Ready

Request to Send

Clear to Send

Table 2-2: Serial Port Pin Assignments

2-10 NetClock/GPS Instruction Manual

Spectracom Corporation Model 9283

2.7.2 RS-485 Remote Port

The NetClock has two remote ports labeled “RS-485 PORT 1” and “RS-485 PORT 2”. These outputs provide a continuous once-per-second time data stream in the selected Data Format.

Two input time Data Formats, five output time Data Format selections, and one position data stream in NMEA 0183 format are available. Refer to Section 6 for a complete description of the

Data Format structures.

In addition to Data Formats, baud rate and UTC time difference of each output is selectable.

A 3-position terminal block is supplied in the ancillary kit for each of the Remote Connections.

Also included in the ancillary kit is a jeweler’s type screwdriver to tighten the screws. Connector pin assignments are shown in Figure 2-6.

RS-485 REMOTE

+ - G + - G

PORT 1 PORT 2

Figure 2-6: Remote Outputs

RS-485 is a balanced differential transmission requiring twisted pair cabling.

RS-485 characteristics make it ideal to distribute time data throughout a facility. Each Remote

Output can provide time to 32 devices at cable lengths up to 4,000 feet. Refer to the RS-485

Output diagram for a schematic representation of each RS-485 output driver. Relative to RS-

485 specifications, the A terminal (Pin 2) is negative with respect to the B terminal (Pin 1) for a mark or binary 1. The A terminal is positive to the B terminal for a space or binary 0.

B

A

1

2

3

B Terminal (+)

A Terminal (-)

Figure 2-7: RS-485 Output

NetClock/GPS Instruction Manual 2-11

Model 9283 Spectracom Corporation

Spectracom offers many devices that accept the RS-485 data stream as an input reference.

These products include display clocks, RS-485 to RS-232 converters, Ethernet Time Servers, and radio link products to meet various time applications and requirements. For information on

Remote Output usage refer to Section 2.7.2.

2.7.3 Remote Output Usage

The Remote Outputs provide a continuous once-per-second time data stream in RS-485 levels.

RS-485 is a balanced differential transmission, which offers exceptional noise immunity, long cable runs and multiple loading. These characteristics make RS-485 ideal for distributing time data throughout a facility.

Each Remote Output can drive 32 devices over cable lengths up to 4000 feet. Spectracom manufactures wall clocks, Ethernet Time Servers, RS-485 to RS-232 converters and radio link products that utilize the RS-485 data stream as an input.

Refer to sections 2.7.4, 2.7.5, and 2.7.6 for more information on time data bus interconnections.

Follow the guidelines contained therein when constructing the RS-485 data bus.

2.7.4 RS-485 Guidelines and Cable Selection

Low capacitance, shielded twisted pair cable is recommended for installations where the RS-

485 cable length is expected to exceed 1500 feet. Table 2-3 suggests some manufacturers and part numbers for extended distance cables. These cables are specifically designed for RS-422 or RS-485 applications; they have a braided copper shield, nominal impedance of 120 ohms, and a capacitance of 12 to 16 picofarads per foot.

RS-485 cable may be purchased from Spectracom. Specify part number CW04xxx, where xxx equals the length in feet.

MANUFACTURER

Belden Wire and Cable Company

1-800-BELDEN-1

PART NUMBER

9841

Carol Cable Company

606-572-8000

C0841

National Wire and Cable Corp.

D-210-1

232-225-5611

Table 2-3: Cable Sources for RS-485 Lines Over 1500 Feet

For cable runs less than 1500 feet, a lower-cost twisted pair cable may be used. Refer to Table

2-4 for possible sources. In addition, Category 5 cables may be used for cable runs less than

1500 feet.

MANUFACTURER

Alpha Wire Corporation

1-800-52ALPHA

Belden Wire and Cable Company

1-800-BELDEN-1

PART NUMBER

5471

9501

Carol Cable Company

C0600

606-572-8000

Table 2-4: Cable Sources for RS-485 Lines Under 1500 Feet

2-12 NetClock/GPS Instruction Manual

Spectracom Corporation Model 9283

The RS-485 transmission line must be connected in a daisy chain configuration as shown in

Figure 2-8. In a daisy chain configuration, the transmission line connects from one RS-485 receiver to the next. The transmission line appears as one continuous line to the RS-485 driver.

A branched or star configuration is not recommended. This method of connection appears as stubs to the RS-485 transmission line. Stub lengths affect the bus impedance and capacitive loading which could result in reflections and signal distortion.

NTP Time Server

9288 Time Server

RS-485

In/Out

Terminal

Block

RS-485

In/Out

Terminate End

DISPLAY

TimeView 230

Device

Terminal

Block

RS-232

8179T TimeTap

Terminal

Block

NetClock

RS-485

Time Data

Bus

RS-485

In/Out

Twisted

Pair Cable

Terminal

Block

TimeView 400

RS-485

In/Out

Terminal

Block

8179T TimeTap

RS-485

In/Out

Terminal

Block

TimeBurst

Display RS-232

Figure 2-8: One-Way Bus Installation

NetClock/GPS Instruction Manual 2-13

Model 9283 Spectracom Corporation

The RS-485 Output can be split in a total of two directions as shown in Figure 2-9. This allows the NetClock to be centrally located. Connecting in this method can simplify installation and possibly reduce the amount of cable required.

DISPLAY

Terminate End

Device

RS-232

Terminate End

NTP Time Server

Device

RS-232

TimeView 312

RS-485

In/Out

Terminal

Block

8179T TimeTap

Terminal

Block

9288 Time Server

RS-485

In/Out

8179T TimeTap

Terminal

Block

Twisted

Pair Cable

RS-485

Time Data

Bus

RS-485

In/Out

Terminal

Block

RS-485

In/Out

Terminal

Block

Terminal

Block

TimeView 230

Display

NetClock

8179T TimeTap

RS-232

Figure 2-9: Split Bus Configuration

2-14 NetClock/GPS Instruction Manual

Spectracom Corporation Model 9283

NOTE: Most RS-485 connections found on Spectracom equipment are made using a removable terminal strip. A jaw that compresses the wires when tightened secures the wires. When using small diameter wire, 22-26 gauge, a strain relief can be fashioned by wrapping the stripped wire over the insulating jacket. Wrapping the wires in this manner prevents smaller gauge wires from breaking off when exposed to handling or movement.

STRIP WIRE WRAP WIRE OVER

INSULATING JACKET

INSERT WRAPPED

END AND TIGHTEN

Figure 2-10: Wire Strain Relief

TimeView display clocks use a 6-position terminal block to connect to the RS-485 data bus.

Connect the TimeView to the NetClock RS-485 Output as shown in

Figure 2-11. The TimeView display clocks accept only Data Formats 0 or 1.

NETCLOCK

REMOTE OUTPUT

Twisted Pair TO TIMEVIEW

RS-485 IN/OUT

3

1

2

+DATA

-DATA

GROUND

1

2

3

+DATA

-DATA

GROUND

3-POSITION

TERMINAL BLOCK

4

5

6

Figure 2-11: TimeView RS-485 Interface

TO OTHER

RS-485

DEVICES

The Model 8179T TimeTap is an RS-485 to RS-232 converter. The Model 8179T has a DB9

RS-232 interface that receives operational power from the RS-232 flow control pins RTS or

DTR. Connect the TimeTap to the RS-485 data bus as shown in Figure 2-12.

NetClock/GPS Instruction Manual 2-15

Model 9283 Spectracom Corporation

NETCLOCK

REMOTE OUTPUT

1

3

2

+DATA

-DATA

GROUND

3-POSITION

TERMINAL BLOCK

Twisted Pair

TO MODEL 8179T

TIMETAP

1

2

3

4

5

+DATA

-DATA

GROUND

5-POSITION

TERMINAL BLOCK

Figure 2-12: Model 8179T TimeTap RS-485 Interface

TO OTHER

RS-485

DEVICES

Spectracom Model 9288 is an Ethernet Time Server that supports NTP and SNTP time protocols. The Model 9288 accepts Format 0, Format 2, Format 7, or Format 8 (Formats 7 and

8 are not available on all time sources – Contact Tech Support for additional information) and connects to the RS-485 data bus through a three-position terminal block. Connect the Model

9288 to the NetClock as shown in Figure 2-13.

.

NETCLOCK

REMOTE OUTPUT

+DATA

3

1

2

-DATA

GROUND

Twisted Pair TO ETHERNET TIME

SERVER

1

2

3

+DATA

-DATA

GROUND

TO OTHER

RS-485

DEVICES

3-POSITION

TERMINAL BLOCK

Figure 2-13: Model 9288 RS-485 Interface

The Model 8185, TimeBurst

™, provides a digital time-of-day data burst to a radio transmitter.

The TimeBurst accepts Data Format 0 or 1. Connect the TimeBurst to the RS-485 data bus using a 3-position terminal block as shown in Figure 2-14.

2-16 NetClock/GPS Instruction Manual

Spectracom Corporation Model 9283

NETCLOCK

REMOTE OUTPUT

1

2

3

+DATA

-DATA

GROUND

3-POSITION

TERMINAL BLOCK

Twisted Pair

TO TIMEBURST RS-485

INPUT

3

1

2

+DATA

-DATA

GROUND

TO OTHER

RS-485

DEVICES

Figure 2-14: TimeBurst RS-485 Interface

2.7.6 Termination

A 120 Ohm termination resistor is required on devices located at the ends of the RS-485 transmission line. Terminating the cable end preserves data integrity by preventing signal reflections.

For a one-way bus installation (Figure 2-8), terminate the last device on the bus. The RS-485 data bus can be split in two directions as shown in Figure 2-9. In a split bus configuration, terminate the devices installed on each end of the bus. Some Spectracom products include a built-in termination switch to terminate the RS-485 bus when required or a resistor is supplied with the equipment if no termination switch is available. The terminating resistor is installed between the positive and negative connections on the terminal block of the last RS-485 connection.

NetClock/GPS Instruction Manual 2-17

Model 9283 Spectracom Corporation

2-18 NetClock/GPS Instruction Manual

Spectracom Corporation Model 9283

3 Product Configuration

NOTE: Screens shown in this manual are for illustrative purposes. Actual screens may vary.

Software common to multiple NetClock models may be used to generate these screens. As a result, labels in the screens displayed may refer to units other than your specific NetClock. Software operation should be common among these models, where appropriate.

After installing the NetClock, verify that power is connected and wait for the device to boot up.

The front panel display provides certain configuration data on start-up. The right panel, by factory default, displays the date and time (UTC). The left panel displays the unit’s hostname,

IPv4 address, mask, and gateway.

NOTE: If using DHCP, the IP address will be assigned automatically and displayed on the front panel. You may use a Web browser to connect to this IP address and configure the

NetClock through the Web Browser User Interface (Web UI) (Figure 3-1). Refer to

Network Configuration with DHCP, Section 3.1.

Figure 3-1: Entering to the Configuration in the Web UI

NetClock/GPS Instruction Manual 3-1

Model 9283 Spectracom Corporation

When configuring a NetClock without DHCP, or to configure a NetClock that has not been assigned an IP address, refer to Network Configuration, Section 3.2.

3.1 Network Configuration with DHCP

Once connected to the DHCP server through the network, the NetClock is assigned an IP address. This address and other network information is displayed on the front panel when the device boots up. Enter the IP address in your browser (on a computer connected to the network) and log in as an administrator. The http session will be redirected automatically to an https session and a security certificate pop-up window will be displayed. Accept the certificate by clicking “OK.”

NOTE: Unless you are using DNS in conjunction with

DHCP (with the client configured using the

NTP server's hostname instead of IP address),

DHCP must be disabled and the IP address must be changed to a static address once the

NetClock is properly configured. Failure to do this will result in a loss of time synchronization if the DHCP server assigns a new IP address to the NetClock.

Your login name is admin

The password is admin123

3-2

Figure 3-2: Web Browser User Interface (Web UI)

NetClock/GPS Instruction Manual

Spectracom Corporation Model 9283

When you enter the NetClock IP address in your browser (this will differ from the IP address shown in the examples within this manual), you will be prompted to log in (Figure 3-1). The default administrator account is set at the factory as admin. The password is admin123.

After entering the login name and password and successfully logging into the NetClock, the user will see a Web UI screen similar to Figure 3-2. From this screen, click the Security tab. The

Security menu will be displayed on the left side of the Web UI. Click the Network link to access the necessary Network configuration fields (Figure 3-3 and Figure 3-4).

Figure 3-3: Security – Network Screen (1 of 2)

NetClock/GPS Instruction Manual 3-3

Model 9283 Spectracom Corporation

Refer to the Initial Network Configuration section to continue your product configuration.

3-4

Figure 3-4: Security – Network Screen (2 of 2)

NetClock/GPS Instruction Manual

Spectracom Corporation Model 9283

3.2 Initial Network Configuration

NOTE: The IP address assignment in this configuration may be performed even if your network has a DHCP server. There may be times when you do not wish DHCP to assign the IP address for the NetClock.

To configure a NetClock without DHCP or to configure a NetClock that has not been assigned an IP address, use the provided serial cable to connect a PC or laptop computer to the serial setup port on the back of the NetClock. After making this connection, use a terminal program

(such as HyperTerminal) to log into the NetClock as an administrator. Use the Command Line

Interface (CLI) in the terminal program to configure initial values and determine the NetClock’s network address.

3.2.1 Using HyperTerminal to Connect to the Netclock

Microsoft’s HyperTerminal program is typically located under Accessories – Communications in the Windows PC Start Menu. (Most terminal programs can be used to connect to the NetClock. it is not necessary to use HyperTerminal specifically.) Establish a new connection using the serial port to which you have connected the NetClock (typically COM1).

Figure 3-5: Establishing a New Terminal Connection

NetClock/GPS Instruction Manual 3-5

Model 9283 Spectracom Corporation

Figure 3-6: Connecting to the Computer’s Serial Port

Configure the COM1 properties as shown in Figure 3-7. Bits per second should be 9600. Data

bits should be 8. Parity should be none. Stop bits should be 1. Flow control should be none.

When the connection is established in the terminal window, the command line prompt will appear (Figure 3-8).

3-6

Figure 3-7: Configuring the Serial Port Connection Properties

NetClock/GPS Instruction Manual

Spectracom Corporation Model 9283

Figure 3-8: Spectracom NetClock Command Line Interface (CLI)

Log in as an administrator using the name admin and the password admin123. (Login names and passwords are case-sensitive.) A successful login will return the prompt [email protected], where x.x.x.x is the IP address of the NetClock.

Typing

help in the Command Line Interface (CLI) will display a list of available commands

(Figure 3-9). Typing net will display the CLI net commands. The command

net config will walk the user through initial configuration.

NetClock/GPS Instruction Manual 3-7

Model 9283 Spectracom Corporation

Figure 3-9: Available CLI Commands

Initial configuration settings can be modified subsequently through either the serial port or the

Web UI. The values entered in the following fields are specific to your setup. Your network administrator may assign and provide some or all of the required information.

If you are not using DHCP in conjunction with DNS (using domain names rather than IP addresses), the IP address of the NetClock must be changed from the factory default to the new static address for your particular network before the NetClock can be accessed through the

Web UI (and before it can provide NTP time stamps to synchronize the network).

3-8 NetClock/GPS Instruction Manual

Spectracom Corporation

2

3

6

7

8

DSR

RTS

CTS

O

*

*

Data Set Ready

Request to Send

Clear to Send

Table 3-1: Serial Setup Cable Pin-Outs

Model 9283

5 4 3 2

9 8 7 6

1

Figure 3-10: Serial Port Pin Configuration

RXD

TXD

DESCRIPTION

O Receive Data (RS-232 output data to PC)

I Transmit Data (RS-232 input data from PC)

NetClock/GPS Instruction Manual 3-9

Model 9283 Spectracom Corporation

3.2.2 Initial Network Setup

At the CLI, enter the command net config. Set the prompted values to complete initial network setup. In this manual, the convention <enter> is used to indicate pressing the enter key.

Figure 3-11: Net Commands

3-10

Figure 3-12: Prompt for Initial Configuration Values in the CLI

NetClock/GPS Instruction Manual

Spectracom Corporation Model 9283

During initial configuration, you will be prompted to enable or disable and enter, as necessary, various settings and addresses. The include the following:

Hostname: This is the network hostname that identifies the NetClock.

DNS Server: This is the IP address of the DNS server (if any).

DHCP Setting: This enables or disables DHCP. This must be set for IPv4 and IPv6. The

NetClock always generates a static IPv6 address in addition to the dynamic

IPv6 address(es).

Gateway: When the gateway IP is disabled on the product, the unit cannot be accessed from subnets outside the local subnet. When enabled, the IP address of the subnet's gateway must be specified. The default is disabled.

IP Address: This is the unique 32-bit static address assigned to the product. The default address is 10.10.200.1

Figure 3-13: Initial Configuration using the CLI

NetClock/GPS Instruction Manual 3-11

Model 9283 Spectracom Corporation

Figure 3-14: Successful Completion of Network Configuration

NOTE: All IPv4 addresses must be entered in “dotted quad” format. All IPv6 addresses must be entered in standard IPv6 address format.

NOTE: Setting the gateway to Disabled will cause the values in the Gateway Address field to be ignored.

NOTE: Changing the IP address of the NetClock to a different subnet will prompt the NetClock to start using the new IP address immediately. If you are connected to the CLI through a network instead of directly through the serial setup port, your session will end when the IP address is changed. Start a new session and use the new IP address to reconnect to the CLI.

3-12 NetClock/GPS Instruction Manual

Spectracom Corporation Model 9283

3.2.3 Default and Recommended Configurations

The factory default configuration settings were chosen for ease of initial setup. Refer to the recommended settings listed here as applicable for your unit.

Configuration Default Recommended Where Enabled

Web User Interface

HTTP Enabled

Interface

HTTPS

Enabled

– Using customer-generated certificate and key or default Spectracom self-signed certificate and common public/private key SSH/SCP/SFTP enabled with unit unique 1024 bit keys

SNMP Disabled

Disabled or

Enabled with:

– SNMP v3 w/ encryption*

NTP

Daytime Protocol

Enabled

– With no

MD5 Values Entered

Disabled

Enabled

– Use MD5 authentication with user-defined keys

Disabled

Time Protocol Disabled Disabled

Web User Interface

Web User Interface

Web User Interface

Web User Interface

Web User Interface

Console Port

Command Line Interface

Available

– Unless dial-out modem connected

(uses this port)

Disabled

Web User Interface

SSH Enabled (default keys provided)

File Transfer

Enabled Web User Interface

Disabled

Web User Interface

SCP Available Applicable

SFTP Available Available Applicable

*We recommend secure clients use only SNMPv3 with authentication for secure installations.

Table 3-2: Default and Recommended Configurations

NetClock/GPS Instruction Manual 3-13

Model 9283 Spectracom Corporation

3.3 Issuing the HALT Command before Removing Power

Once power is applied to the NetClock, it should not be removed unless the HALT command is issued to the unit. This prevents corruption of the NetClock file system.

CAUTION: Once power is applied to the unit, DO NOT disconnect power unless the HALT command is first issued to the NetClock. To be absolutely certain that it is safe to remove power, wait 30 seconds after the HALT command is issued before removing power.

The HALT command may be issued to the NetClock through the Web UI, through the CLI, or through SNMP.

3.3.1 Issuing the HALT Command through the Web UI

From the System Reboot/Halt page (Figure 3-15), click the Halt Now button. Wait 30 seconds after making the HALT request before removing power to the unit. (The system may also be rebooted from this screen.)

3-14

Figure 3-15: System Reboot/Halt Screen (1 of 3)

NetClock/GPS Instruction Manual

Spectracom Corporation Model 9283

Figure 3-16: System Reboot/Halt Screen (2 of 3)

Figure 3-17: System Reboot/Halt Screen (3 of 3)

NetClock/GPS Instruction Manual 3-15

Model 9283 Spectracom Corporation

3.3.2 Issuing the HALT Command through the CLI

From the CLI (Figure 3-18), enter halt (Figure 3-19) Entering reboot will reboot the system

(Figure 3-20).

NOTE: Wait 30 seconds after entering the HALT command before removing power.

Figure 3-18: Command Line Interface (CLI)

3-16

Figure 3-19: Halting the System from the CLI

NetClock/GPS Instruction Manual

Spectracom Corporation Model 9283

Figure 3-20: Rebooting the System from the CLI

3.3.3 Issuing the HALT Command through SNMP

The Reboot MIB location options in the NetClock (Figure 3-21) are as follows:

• HALT to shutdown (NOTE: Wait 30 seconds after shutting down before removing power)

• NO to do nothing

• YES to reboot the NetClock.

Figure 3-21: Reboot MIB Location Options (SNMP)

NetClock/GPS Instruction Manual 3-17

Model 9283 Spectracom Corporation

To reboot or halt the NetClock through SNMP, Spectracom provides a REBOOT MIB option.

This is found in the tfSsytemObjsInfo table in the Spectracom Time and Frequency MIB under

Spectracom Products specProduct, specTimeFreqMIB, in the specTimeFreqObjs under tfSystemObjs, in the table tfSystemObjsInfo. The REBOOT option (Figure 3-22) provides the choices of NO or YES for Reboot, and Halt to initiate a shut-down request.

Figure 3-22: Rebooting the Unit through SNMP

To Reboot the unit, select YES and select the SET check box in the upper left corner of the

SNMPc management console application. The Set operation reports success, but can with some SNMP managers return Set Unsuccessful due to a race condition in rebooting the unit and replying over SNMP. This is not an error.

To Halt the unit, select HALT and select the SET checkbox (Figure 3-23).

3-18 NetClock/GPS Instruction Manual

Spectracom Corporation Model 9283

Figure 3-23: Halting the Unit through SNMP

Figure 3-24: Successful Halt

The Set Successful Table box (Figure 3-24) will display to indicate that the Halt request to shut down the NetClock has been accepted. Wait 30 seconds before removing power.

NetClock/GPS Instruction Manual 3-19

Model 9283 Spectracom Corporation

3.4 Product Configuration using the WEB UI

With the NetClock connected to the network, you may configure it, change its operating settings, check its status, and generate reports from the Web UI as needed and desired. All Web UI screens are accessible through the menu at the bottom of the screen, which is displayed after a successful login. These screens, their functions, and example configurations (where applicable) are presented in this section.

NOTE: At any time during configuration in the Web UI, click “Submit” to save the settings or

“Reset” to restore the settings to their previous state.

Figure 3-25: Web UI Primary Menu

The NTP menu groups the NetClock’s NTP configuration and reporting functions (Figure 3-26).

From this menu, the user may access the NTP General, References, Symmetrical Keys,

Autokey, and Status screens.

3-20

Figure 3-26: Web UI NTP Menu

NetClock/GPS Instruction Manual

Spectracom Corporation Model 9283

Network Time Protocol (NTP) and Simple Network Time Protocol (SNTP) are client-server protocols for synchronizing time on IP networks. NTP provides greater accuracy and error checking than does SNTP. NTP and SNTP can be used to synchronize the time on any computer equipment compatible with the Network Time Protocol. This includes CISCO routers and switches, UNIX machines, and Windows machines with suitable clients. To synchronize a single workstation, several freeware or shareware NTP clients are available on the Internet. The software running on the PC determines whether NTP or SNTP is used.

NetClock/GPS Instruction Manual

Figure 3-27: NTP General Screen

3-21

Model 9283 Spectracom Corporation

Refer to Figure 3-27. The NetClock can operate in unicast mode, broadcast mode, or both.

The user can enable or completely disable the NTP Service. When enabled, the NTP Service operates in unicast mode. In unicast mode the NTP Service responds to NTP requests only.

The NTP Service supports a broadcast mode in which it sends a NTP time packet to the network broadcast address. Check the box for NTP Broadcast to enable broadcast mode and select a rate at which to broadcast from the dropdown box. The NTP Broadcast mode is intended for 1 or a few servers and many clients. The NTP Broadcast rate should be selected based upon the network utilization and time drift in the clients. NTP broadcast can utilize MD5 authentication. Select a single MD5 key to use for broadcast from the pulldown menu. Use of

MD5 authentication requires that MD5 symmetrical keys already be defined on the NTP

Symmetrical Keys page. With the NTP service enabled and NTP broadcasting checked, the

NetClock will operate in both modes.

When the NTP service is enabled, the NTP server will “listen” for NTP request messages from

NTP clients on the network. When an NTP request packet is received, the NTP server will send an NTP response time packet to the requesting client. Under typical conditions, the Spectracom

NTP server can service up to 4,000 NTP requests per second without MD5 encryption enabled

(and a somewhat lower rate with MD5 encryption enabled).

When NTP broadcasting is selected, the NTP server will send unsolicited NTP time packets to the local broadcast address at a user-selected rate. The rates available are included in the dropdown menu. The NTP clients can use unicast, broadcast or a combination of both to discover and synchronize with the NTP server.

The NTP server supports authenticated NTP packets using an MD5 authenticator. This feature does not encrypt the time packets, but attaches an authenticator, which consists of a key identifier and an MD5 message digest, to the end of each packet. This can be used to guarantee that NTP packets came from a valid NTP client or server, and that they were not tampered with during transmission.

To use the MD5 authentication with trusted key ID, both the NTP client and the NetClock must contain the same key ID / key string pair and the client must be set to use one of these MD5 pairs. The key ID must be a number between 1 and 65532; the key string must be readable

ASCII and between 1 and 16 characters long. Duplicate key IDs are not permitted. NTP requests received by the NTP server that do not contain an authenticator containing a valid Key

ID and MD5 message digest pair will be responded to, but no authentication will be performed.

NTP requests with valid authenticator result in a valid NTP response with its own valid authenticator using the same Key ID provided in the NTP request.

The NTP Access grid on the NTP General screen allows the user to enable or disable all IPv4 and IPv6 requests, as well as to allow or deny users or network segments. Clicking the “Auth

Only” box on each line where a user or network segment is defined will prompt the NetClock to accept only authenticated requests (MD5 or Autokey) from this user or network segment.

From the NTP References screen (Figure 3-28), the user may check the “Enable Stratum 0

Reference” box. This makes the 9383 a Stratum 1 reference. If this box is not checked, it means the NetClock is a Statum 2 (or higher) reference.

The grids on the NTP References screen allow the user to define, by IP address or hostname, the locations of other NTP servers to use as time references (instead of the configured

NetClock’s GPS reference) and the locations of other NTP servers to use as peers. Peers are

3-22 NetClock/GPS Instruction Manual

Spectracom Corporation Model 9283

NTP servers at the same stratum level that are used as an additional check on the NetClock’s timing accuracy. This prevents it from moving to stratum levels farther away from Stratum 1 if the primary timing reference is lost. The maximum number of Peers allowed is 12. It is recommended to use one or more Peers when you desire to provide mutual backup. Each peer is normally configured to operate from one or more time sources including reference clocks or other higher stratum servers. If a peer looses all reference clocks or fails the other peers continue to provide time to other clocks on the network.

NTP servers can be configured as potential time references. The maximum number of NTP servers used as time references allowed is 12. For best results, more than 4 NTP time servers are recommended. As few as 1 NTP time server may be used, however, depending on your needs and network timing architecture. A specific NTP server can be configured as the preferred time reference by selecting the preferred checkbox. Only a single time reference can be selected as preferred and only when the Netclock is not in Stratum-1 mode using a Stratum-

0 reference such as GPS, IRIG, Modem, or Serial Time Code Input.

For both NTP Peers and NTP Servers the Minimum and Maximum Poll rate for NTP packets can be configured. Both NTP Peers and NTP Servers support either manually configured

Symmetric Key-ID/Key string pairs or the use of Auto-Key. However, these choices are mutually exclusive and must be identically configured on both the Netclock and the NTP Peer or NTP

Server. If the Symmetric Key-ID/Key string pair method is selected the Key-ID must be first defined on the Symmetric Key page.

The entry for NTP Peer or NTP Server can be deleted by checking the Clear button and entering submit.

Figure 3-28: NTP References Screen (1 of 2)

NetClock/GPS Instruction Manual 3-23

Model 9283 Spectracom Corporation

NOTE: Check only ONE server as the preferred reference.

NOTE: You cannot use both a Trusted Symmetrical Key ID and Autokey. Autokey essentially automates the symmetrical key function and the two cannot be used together. If trusted keys have been defined (Figure 3-29), they will appear in the “Trusted Sym

Key ID” dropdown menu.

NOTE: Checking the “Clear” box in the NTP References grids will immediately remove a defined server from the list.

The dropdown menus for “Min Poll” and “Max Poll” in the NTP References grids allow the user to choose, from within the available ranges, how often the NetClock will poll the defined servers for timing information. Check with your network administrator for guidelines regarding network traffic and recommended polling intervals, if any.

3-24

Figure 3-29: NTP References Screen (2 of 2)

NetClock/GPS Instruction Manual

Spectracom Corporation Model 9283

From the Symmetrical Keys screen (Figure 3-30), the user may define the trusted symmetrical keys that must be entered on both the NetClock and any network client with which the NetClock is to communicate. The maximum number of Key-ID/Key String pairs is 15. Only those keys for which the “Trusted” box has been checked will appear in the dropdown menus on the NTP

References screen (Figure 3-28).

Figure 3-30: NTP Symmetrical Keys Screen

NOTE: It may be necessary to enter your username and password again in order to access the Symmetrical Keys screen.

NetClock/GPS Instruction Manual 3-25

Model 9283 Spectracom Corporation

Using Autokey essentially automates the trusted symmetrical key feature. From the Autokey screen (Figure 3-31), the user can click to enable or disable Autokey, enter a passphrase

(readable ASCII, no spaces), and check “Generate Certificate” to generate a certificate in the text window at the bottom of the screen.

NOTE: Generate Certificate must always be clicked to generate the first certificate. If generating a new certificate after the first certificate, the menu will change to read “Regenerate Certificate.”

NOTE: Click the “Trusted” box on only ONE NetClock unit (the one that is closest to Stratum 0.)

3-26

Figure 3-31: NTP Autokey Screen

NetClock/GPS Instruction Manual

Spectracom Corporation Model 9283

NOTE: The Autokey feature can only be configured when NTP is disabled. If NTP is enabled, the fields in the Autokey screen cannot be accessed. To configure Autokey, disable

NTP from the NTP General screen.

The user may also choose to use a Groupkey, which adds another level of authentication when using Autokey certificates. Click the “Generate” option under Autokey Groupkey to generate a certificate in the text window. Cut and paste this text into the text window on the other unit(s) and click the “Upload” option to upload it. Once an Autokey Groupkey has been generated the first time, the :”Keep Current Groupkey (Below)” option will be selected by default.

The Statistics FTP screen (Figure 3-32) allows the user to configure the locations to which the unit transmits NTP statistical data. Files are sent to the remote serve thirty minutes into every hour. Remote file names are appended with the UTC date stamp (YYYMMDD).

NetClock/GPS Instruction Manual

Figure 3-32: Statistics FTP Screen

3-27

Model 9283 Spectracom Corporation

The NTP Status screen (Figure 3-33) provides statistics and a graphical representation of various NTP statistics relevant to the NetClock’s function. This includes whether the NetClock is time synchronized, its stratum level, the location of its selected reference, its delay, offset, and jitter, and statuses for defined timing references on the network.

Figure 3-33: NTP Status Screen

Spectracom cannot provide technical assistance for configuring and installing NTP on Unixbased applications. Please refer to www.ntp.org/ for NTP information and FAQs. Another good source for support is the Internet newsgroup at

news://comp.protocols.time.ntp/.

Spectracom can provide support for the Windows NT, Windows 2000, and Windows XP time synchronization. Refer to the Spectracom Web page,

www.spectracomcorp.com, for more information, or contact Spectracom Technical Support by phone at

US +1.585.321.5800.

3-28 NetClock/GPS Instruction Manual

Spectracom Corporation Model 9283

3.4.3 Configuring the Interface

The Interface menu (Figure 3-34) groups the NetClock’s Interface configuration functions. From this menu, the user may access the Interface Serial Port, Remote Port, IRIG, Display, and

Frequency Output screens. The user may also use this menu to set the interface configuration to the factory default settings.

Figure 3-34: Interface Menu

The NetClock has two serial ports (RS-232 ports) and two remote output ports (RS-485 ports) that support independent output of date/time stamps from the NetClock. From the respective screens for the serial and remote ports (Figure 3-35 and Figure 3-36), the user may define the baud rate and the Data Format for each port. The system clock may also be selected if a local clock (set for a local time zone) has been defined. Serial ports include the “Request Char” feature, which allows the user to choose between multicast (broadcasting once per second on the second through the port) and a user-defined character. When the character of the user’s choice is entered, the NetClock will broadcast through the port only when that character is received by the unit.

NetClock/GPS Instruction Manual 3-29

Model 9283 Spectracom Corporation

Figure 3-35: Interface Serial Port 1 Screen

The baud rate is the speed at which the port will output values. This speed must be selected from the dropdown box. The default is 9600 baud.

The Data Fomat is the format in which the date and time stamps are sent from the NetClock.

Several Data Formats are supported. The default is Format 0.

NOTE: Data Format 2 is always a Coordinated Universal Time (UTC) output. It cannot have a

Time Zone Offset or the Daylight Saving Time (DST) rule enabled. Conversion to local lime is accomplished by the device receiving the data. An error will be generated if a

Time Zone Offset or DST rule is applied to Data Format 2. NTP never outputs local time.

3-30 NetClock/GPS Instruction Manual

Spectracom Corporation Model 9283

Figure 3-36: Interface Remote Port 2 Screen

Clicking the link to create and edit local systems clocks will display the Local System Clock screen. Refer to the System configuration screens in this manual for information on setting and editing local system clocks.

NetClock/GPS Instruction Manual 3-31

Model 9283 Spectracom Corporation

From the Interface IRIG screen, the user may configure the IRIG format, amplitude control, and signature. IRIG is an acronym for Inter-Range Instrumentation Group. In the late 1950s, this group created a series of time code standards suitable for use with recording oscillographs, magnetic tape, and real time transmission.

Figure 3-37: Interface IRIG Screen

Each IRIG code specifies a carrier frequency that is modulated to encode date and time, as well as control bits to time-stamp events. Initially, IRIG applications were primarily military and government associated. Today, IRIG is commonly used to synchronize voice loggers, recall recorders, and sequential event loggers found in emergency dispatch centers and power utilities.

3-32 NetClock/GPS Instruction Manual

Spectracom Corporation Model 9283

Frame

Interval

Carrier Coded

Expressions

B

B

E

E

E

B120

B000

E111

E121

E001

100 pps

100 pps

10 pps

10 pps

10 pps

AM

PW

AM

AM

PW

1 sec

1 sec

10 sec

10 sec

10 sec

1 kHz

N/A

100 Hz

1 kHz

N/A

BCD

TOY

, CF,

SBS

BCD

TOY

, CF,

SBS

BCD

TOY

, CF

BCD

TOY

, CF

BCD

TOY

, CF

NOTE: The Spectracom IRIG formats use the control functions for BCD year information and a Time Sync Status bit and in format E the control functions are used for straight binary seconds (SBS). Refer to individual IRIG Time Code description figures and text.

IRIG Standard 200-98 format B had 27 control bits and format E had 45 bits for control functions. These control bits could be used for any use and there was no defined function. Spectracom used the control function element at index count 55 as the TIME

SYNC STATUS and the sub-frame after position identifiers P6 and P7 as the year info and for format E the sub-frame after P8 and P9 for the straight binary seconds (SBS).

The position of the BCD year information does not conform to the newer IRIG

Standard 200-04. IRIG Standard 200-04 incorporated the year information after P5 and reduced the allocated control bits to 18 for format B and 36 for format E. having a positive pulse width equal to 0.8 of the reciprocal of the bit rate, a binary one

(1) having a positive pulse width equal to 0.5 of the reciprocal of the bit rate and a binary zero (0) having a positive pulse width equal to 0.2 of the reciprocal of the bite rate.

The NetClock can provide an IRIG B or IRIG E code in amplitude modulated (AM) or pulse width coded (TTL/DCLS) formats. A signature control feature may be enabled for any IRIG output. Signature control removes the modulation code when a Time Sync Alarm is asserted.

IRIG FORMAT: Choose the format, level and carrier desired.

IRIG AMP CONTROL: The peak-to-peak output voltage level into a 600 ohm load is adjusted by entering a digital control value in this field. The level adjustment has no effect on TTL/DCLS outputs, only on AM formats. Figure 3-38 shows typical output levels for digital control values from 0 – 255.

NOTE: These are nominal values only. Actual values will vary from unit to unit. To adjust the level precisely, connect an oscilloscope to the output connector when adjusting.

NetClock/GPS Instruction Manual 3-33

Model 9283 Spectracom Corporation

IRIG Peak-to-Peak Voltage

7

6

5

4

3

2

1

0

0 50 100 150 200

Digital Amplitude Control Values

250 300

Figure 3-38: IRIG Output Level

IRIG SIGNATURE: When set to Sync, the modulation is removed when the Time Sync Alarm is asserted. When set to None, the modulation will be present even if the Time Sync Alarm is asserted.

For reference, detailed information about the IRIG B and IRIG E formats follows.

.

3-34 NetClock/GPS Instruction Manual

Spectracom Corporation

3.4.3.1 IRIG B Output

Model 9283

Figure 3-39: IRIG B Time Code description

NetClock/GPS Instruction Manual 3-35

Model 9283 Spectracom Corporation

The IRIG B code contains the Binary Coded Decimal (BCD) time of year, Control Function (CF) field and the Straight Binary Seconds time of day. The following figure illustrates the IRIG B data structure. The BCD time of year provides the day of the year, 1-366, and the time of day including seconds. The hour of the day is expressed in 24 hour format. The SBS time is the number of seconds elapsed since midnight. The Control Function field contains year information and a time synchronization status bit.

1.

2.

Time frame: 1.0 seconds.

Code digit weighting:

A. Binary Coded Decimal time-of-year.

Code word - 30 binary digits.

Seconds, minutes hours, and days.

B. Straight Binary Seconds time-of-day.

Code word - 17 binary digits.

Seconds only, recycles daily.

Code word structure: 3.

BCD: Word seconds digits begin at index count 1. Binary coded elements occur between position identifier elements P0 and P5 (7 for seconds, 7 for minutes, 6 for hours, and 10 for days) until the code word is complete. An index marker occurs between decimal digits in each group to provide separation for visual resolution. Least significant digit occurs first.

CF: IRIG formats reserve a set of elements known as Control Functions (CF) for the encoding of various control, identification, or other special purpose functions. IRIG B has 27 Control

Functions located between elements 50 and 78. The NetClock uses the Control Functions to encode year information and time synchronization status.

Table 3-3 lists the Control Function Field and each element's function.

Element 55 is the time synchronization status bit. Element 55 is a Binary 1 when the front panel time synchronization lamp is green, and a Binary 0 when the lamp is red.

Year information consists of the last two digits of the current year (i.e. 97, 98, 99 etc.).

Elements 60 through 63 contain the binary equivalent of year units. Elements 65 through 68 contain the binary equivalent of tens of years. In keeping with IRIG formats, the least significant bit occurs first. All unused Control Functions are filled with a space (Binary 0).

SBS: Word begins at index count 80. Seventeen Straight Binary Coded elements occur with a position identifier between the 9th and 10th binary coded elements. Least significant digit occurs first.

4. Pulse rates:

Element rate: 100 per second.

Position identifier rate: 10 per second.

Reference marker rate: 1 per second.

5. Element identification: The "on time" reference point for all elements is the pulse leading edge.

3-36 NetClock/GPS Instruction Manual

Spectracom Corporation Model 9283

Index marker (Binary 0 or uncoded element): 2 millisecond duration.

Code digit (Binary 1): 5 millisecond duration.

Position identifier: 8 millisecond duration.

Reference marker, 1 per second. The reference marker appears as two consecutive position identifiers. The second position identifier marks the on-time point for the succeeding code word.

6. Resolution:

Pulse width coded signal: 10 milliseconds.

Amplitude modulated signal: 1 millisecond.

7. Carrier frequency: 1 kHz when modulated.

C.F. ELEMENT # DIGIT # FUNCTION

Table 3-3: IRIG B Control Function Field

3.4.3.2 IRIG E Output

The IRIG E code contains the Binary Coded Decimal (BCD) time of year and Control Functions.

Figure 3-40 illustrates the IRIG E data structure. The BCD time of year provides the day of year, 1-366, and time of day to tens of seconds. The hour of the day is expressed in 24 hour

NetClock/GPS Instruction Manual 3-37

Model 9283 Spectracom Corporation format. The Control Function field includes a time synchronization status bit, year information and SBS time of day.

1. Time frame: 10 seconds.

2. Code Digit Weighting:

Binary Coded Decimal time of year.

Code world - 26 binary digits.

Tens of seconds, minutes, hours, and days.

3. Code Word Structure: BCD word tens of seconds digits begin at index count 6. Binary coded elements occur between position identifier elements P0 and P5 (3 for seconds, 7 for minutes, 6 for hours, and 10 for days) until the code word is complete. An index marker occurs between decimal digits in each group to provide separation for visual resolution. Least significant digit occurs first.

4. Control Functions: IRIG formats reserve a set of elements known as Control Functions (CF) for the encoding of various control, identification, or other special purpose functions. IRIG E has

45 Control Functions located between elements 50 and 98. The NetClock uses the Control

Function field to encode year data, time synchronization status, and SBS time data. Table B-2 lists the Control Function Field and each element's function.

Element 55 is the time synchronization status bit. Element 55 is a Binary 1 when the front panel time synchronization lamp is green, and a Binary 0 when the lamp is red.

Year information consists of the last two digits of the current year (i.e. 98, 99, etc.). Elements

60 through 63 contain the binary equivalent of year units. Elements 65 through 68 contain the binary equivalent of tens of years. In keeping with IRIG formats, the least significant bit occurs first.

Elements 80 through 97 are encoded with the Straight Binary Seconds (SBS) time data. The

SBS time data is incremented in 10-second steps and recycles every 24 hours.

5. Pulse rates:

A. Element rate: 10 per second.

B.

C.

Position identifier rate: 1 per second.

Reference marker rate: 1 per 10 seconds.

6. Element identification: The "on time" reference point for all elements is the pulse leading edge.

Index marker (Binary 0 or uncoded element): 20 millisecond duration.

Code digit (Binary 1): 50 millisecond duration.

Position identifier: 80 millisecond duration.

Reference marker: 80 millisecond duration, 1 per 10 seconds. The reference marker appears as two consecutive position identifiers. The second position identifier or reference marker is the on-time point for the succeeding code word.

3-38 NetClock/GPS Instruction Manual

Spectracom Corporation Model 9283

Figure 3-40: IRIG E Time Code Description

NetClock/GPS Instruction Manual 3-39

Model 9283

BIT # CF ELEMENT # FUNCTION

Spectracom Corporation

3-40

Table 3-4: IRIG E Control Function Field

NetClock/GPS Instruction Manual

Spectracom Corporation Model 9283

Figure 3-41: Interface Front Panel Display Screen

The NetClock has two front panel displays that are independently programmable. The left display is LCD 1 and the right display is LCD 2. You may use the Web UI to change the display and time format and to select (or edit, or create) system clocks. The display font may also be changed (and includes a custom font, named “Mark.”) When you make a change to the front panel display configuration and click “Submit,” the change in the display is immediately visible on the front panel.

NOTE: When selecting a system clock to display on one LCD of the front panel LCDs, while displaying the date on the other LCD, be sure to use the same system clock in both display. If setting the time to local time, change the date to local time as well.

Otherwise, the “new day” time and the “new date” rollover may not coincide with each other.

NetClock/GPS Instruction Manual 3-41

Model 9283 Spectracom Corporation

Figure 3-42: Interface Frequency Output Screen

The rear panel 10 MHz output can be disabled in the event of an alarm condition or loss of time synchronization. This feature is known as signature control. From the Interface Frequency

Output screen (Figure 3-42), the user may select from three signature control outputs:

None: 10 MHz output continues regardless of alarm condition.

Major Alarm: 10 MHz output stops if the NetClock experiences a major alarm.

Time Sync: 10 MHz output stops if the NetClock loses time synchronization.

NOTE: Oscillator disciplining depends on a very stable reference 1PPS input signal. Because of this, the Modem dial-out option (Option 03) available for the Model 9283 cannot be used for oscillator disciplining and hence does not result in enabling 10MHz frequency outputs when time synchronization is achieved using these time sources. The

NetClock must be synchronized to GPS with a 3-D fix (minimum of four satellites)

3-42 NetClock/GPS Instruction Manual

Spectracom Corporation Model 9283 when the 10 MHz output must be disciplined for accuracy. Without a 3-D fix present and with signature control set to “None,” the frequency output will always be present but not disciplined for accuracy.

Because a window-mounted antenna will have difficulties maintaining at least four satellites continuously, the window-mount antenna, Model 8228, should not be used when disciplining of the 10 MHZ is desired. The antenna must be installed outdoors with a good view of the horizon.

Figure 3-43: Interface Set to Defaults Screen

From the Interface Set to Defaults screen (Figure 3-43), the user may click the “Restore to factory defaults” button to set the Interface values (and the Interface values ONLY) to the factory settings.

NetClock/GPS Instruction Manual 3-43

Model 9283 Spectracom Corporation

The NetClock may be used as an external time source (ETS) to synchronize an IBM Sysplex

Timer. This is achieved by configuring Serial Port 1 (refer to Configuring the Interface) on the

NetClock to the following settings (Figure 3-44):

Baud Rate: 9600

Data Format: 02

Request Char: User-defined, ‘T’

System Clock: UTC

3-44

Figure 3-44: Configuring Serial Port 1 for Sysplex Timing

NetClock/GPS Instruction Manual

Spectracom Corporation Model 9283

The Sysplex Timer must be configured to use Protocol 2 (NetClock/2) and connected to the

NetClock Serial Comm 1 port via a 9-pin serial cable (not included). Older Sysplex Timers

(9037-001) may connect to an ETS through the Sysplex Timer’s console port, while later model

Sysplex Timers (9037-002) feature a dedicated ETS port.

3.4.5 Configuring the System: SNMP

Figure 3-45: System Menu

The System menu groups the NetClock’s various system configuration functions (Figure 3-45).

From this menu, the user may access screens for SNMP, Alarms, GPS, System Time, Local

System Clocks, System Mode, Modem Configuration (if the NetClock includes the modem option), Reboot, Holdover, and Log Configuration.

NOTE: Refer to Options for modem configuration and related screens. If your NetClock does not have the modem option (which is activated at the factory), the modem menu links will not appear on the System screen. If you purchase the Modem option after receipt

NetClock/GPS Instruction Manual 3-45

Model 9283 Spectracom Corporation of your NetClock system, Spectracom will provide you with a product key for modem activation.

Figure 3-46: System SNMP Screen

SNMP (Simple Network Management Protocol) is a set of standards for managing network devices, which includes a protocol, a database structure specification, and a set of data objects.

The communication protocol involves one or more network management stations monitoring one or more network devices. SNMP enabled devices must have an SNMP agent application that is capable of handling network management functions requested by a network manager.

The agent is also responsible for controlling the database of control variables defined in the product’s Management Information Base (MIB).

Click the radio buttons at the top of the System SNMP screen (Figure 3-46) to enable or disable

SNMP. You may also check the boxes to enable or disable individual traps. (Traps are

3-46 NetClock/GPS Instruction Manual

Spectracom Corporation Model 9283 asynchronous status messages sent from NetClock to the locations specified in the SNMP security screens.)

Spectracom has been assigned the enterprise identifier 18837 by the IANA (Internet Assigned

Numbers Authority). Spectracom’s MIB for its time and frequency products resides under this enterprise identifier @ 18837.3.1 which is illustrated below. i s o

1 o r g

3 d o d

6 i n t e r n e t

1 m g m t

2 m i b - 2

1 e x p e r i m e n t a l

3 p r i v a t e

4 e n t e r p r i s e s

1 s p e c t r a c o m

1 8 8 3 7 s p e c P r o d u c t s

3 s p e c T i m e F r e q M I B

1

Figure 3-47: Spectracom’s MIB

3.4.5.2 SNMP Support

Spectracom’s private enterprise MIB can be obtained from the Spectracom Customer Service department via email. It can also be obtained via File Transfer Protocol (FTP) from the

NetClock using an FTP agent such as Microsoft FTP, CoreFTP, or any other shareware/freeware FTP program.

To obtain the MIB file via FTP, using your FTP program, log in as an administrator and change the file transfer mode to “binary.” The Spectracom MIB files are located in the /MIBS directory and include global, time-frequency, and NTPv4 files. There is a Global (generic) MIB file and a

NetClock-specific MIB file called “Time and Frequency.” FTP the files to the desired location on your PC for later transfer to the SNMP Manager. The MIB files may then be compiled onto the

SNMP Manager.

NOTE: When compiling the MIB files, some SNMP Manager programs may require the MIB files to be named something other than the current name for the files . The MIB file names (“Global” and “Time and Frequency”) may be changed or edited as necessary to meet the requirements of the SNMP Manager. Refer to the SNMP Manager documentation for more information on these requirements.

NetClock/GPS Instruction Manual 3-47

Model 9283 Spectracom Corporation

3.4.6 Configuring Alarms

An alarm is asserted when predefined error conditions exist AND the associated alarm has been enabled.

Through the System Alarm screen (Figure 3-48), the user may define what conditions constitute

Major and Minor alarm conditions. These are the only user-defined Netclock Alarms. Clicking the check box to the left of a particular user-defined alarm will enable that alarm condition.

Each alarm condition may be set to exist for a specified duration before activating the alarm.

This is done by filling in the Timeout fields directly beneath the alarm condition.

Figure 3-48: System Alarm Screen

User-defined Alarm: The user-specified period of time allotted for operation while tracking less than a user-specified number of satellites has expired. This can be a Major and/or Minor alarm.

Software Fault: One or more software sub-systems have experienced a major run-time error. This is a Major alarm.

3-48 NetClock/GPS Instruction Manual

Spectracom Corporation Model 9283

Time Sync Alarm: The period of time allotted for operation without tracking sufficient qualified satellites has expired. The factory default period is 2 hours.

This is a Major alarm.

GPS Receiver Fault: The CPU cannot communicate with the GPS receiver. This is a Major alarm.

Frequency Error: Measured oscillator frequency error exceeds limits (Table 3-5). This is a

Major alarm.

Oscillator Option Frequency

TCXO Standard 6.6 x 10

-9

OCXO Option 05 6.6 x 10

-10

Rb Option 04 3.3 x 10

-10

Table 3-5: Oscillator Frequency Error Limits

Power Failure: The NetClock has lost power. This is both a Major and a Minor alarm.

Antenna Problem: The antenna sense circuitry warns when the antenna is not connected or a cable short or open is detected. This is a Minor alarm.

Oscillator Adjust: The oscillator requires an adjustment to maintain operation within specifications. This is a Minor alarm.

The System GPS screen (Figure 3-49) allows the user to configure the GPS receiver to provide more accurate results and faster start up. Provided the GPS antenna is properly connected, however, it is not necessary to change the factory default settings for the unit to receive and synchronize to GPS time.

ANTENNA CABLE DELAY: By setting the correct antenna cable delay, the on-time point is offset by the delay value to compensate for the antenna and in-line amplifier delays. Under typical conditions, the expected cable and amplifier delays are negligible. You can calculate the delay based on the manufacture’s specifications.

The range of the cable delay is ± 50,000,000 nanoseconds. The default value is 0 nanoseconds and the resolution is 1 nanosecond.

NetClock/GPS Instruction Manual 3-49

Model 9283 Spectracom Corporation

Figure 3-49: System GPS Screen

The following formula is used to calculate the cable delay:

D = (L * C) / V

Where:

D =

L =

C =

V =

Cable delay in nanoseconds

Cable length in feet

Constant derived from velocity of light: 1.016

Nominal velocity of propagation expressed as decimal, i.e. %66 = 0.66 Value is provided by cable manufacturer.

NOTE: The antenna cable delay is nominal and beyond the accuracy specifications of the

GPS receiver. It is not normally necessary to set the antenna cable delay.

3-50 NetClock/GPS Instruction Manual

Spectracom Corporation Model 9283

You can read the current location of the unit calculated by the GPS receiver without logging in.

The GPS receiver will automatically update this field when it has a Position Fix. Check the GPS

Signal Status page (found in the Status and Logs menu). If the status is “Position Fix,” the location shown is the right location.

The location input by the user may only help to speed up the time to the first fix during the initial installation. The unit will automatically check the status of the GPS receiver after receiving the location input from the user. Based on the status of the GPS receiver, the unit will either tell the user that the GPS receiver already has finished the first fix and the input was abandoned, or send the location to the GPS receiver.

3.4.8 Configuring System Time and Local Clocks

The System Time screen (Figure 3-50) allows the user to set the system time manually for test purposes or if there is no external time reference available. Setting the system time when the

NetClock is connected to an external time reference will result in the external reference (for example, GPS) overriding the manually set time. The user may also view (or change) the number of leap seconds difference between UTC and GPS time.

Figure 3-50: System Time Screen

When manually setting the time of the NetClock, the time is entered as UTC, not as your local time. This means the time is not corrected for either Local Time or DST correction. Entering

NetClock/GPS Instruction Manual 3-51

Model 9283 Spectracom Corporation your local time will cause an error of several hours in the NetClock outputs. The amount of error will depend on which Time Zone you are located and whether that Time Zone observers DST.

NOTE: Manually setting the time of the NetClock is not recommended unless no external reference is available to the network. When an external time reference is detected, the time and date will be changed automatically to the reference values. The manually set values will be overwritten. When this occurs, a log entry will be made in the

Operational log indicating the amount of correction that was made from the manually set time. This log then shows if the time was ever manually set and then corrected by another external reference.

NOTE: Manually setting the time while synchronizing to the Option 03 modem will cause loss of time synchronization, automatically triggering a dial-out call to attempt resynchronization. Manually setting the time while synchronizing to GPS will immediately set the time to the GPS reference.

Choosing Create/New from the Local System Clocks screen Figure 3-51) allows the user to define up to five local times (times other than UTC or GPS) to display using the NetClock.

Figure 3-51: Local System Clock Screen (1 of 3)

You can define up to five local clocks or time zones to be used with any of the remote, serial,

IRIG interfaces, event timers, or front panel displays.

3-52 NetClock/GPS Instruction Manual

Spectracom Corporation Model 9283

Once defined, these local clocks can be used by any interface and will cause that interface to be automatically updated for its time zone and Daylight Saving Time (DST) conditions. To configure a local clock, perform the following steps.

NOTE: The local clock is not available from the front panel Ethernet output per the NTP specifications. NTP ALWAYS provides UTC time. Each client on the network must handle corrections for local time.

Figure 3-52: Local System Clock Screen (2 of 3)

NetClock/GPS Instruction Manual 3-53

Model 9283 Spectracom Corporation

Figure 3-53: Local System Clock Screen (3 of 3)

Enter any name you wish for the Local Clock Name, up to 20 characters long. It can be any meaningful name that helps you know your point of reference (example: New York, Wall Clock in Bldg27, Eastern HQ, etc.)

3-54 NetClock/GPS Instruction Manual

Spectracom Corporation Model 9283

TIME ZONE

Under the TIME ZONE SETUP, you will see two choices:

• Automatically configure to unit’s physical locality

• Manually defined UTC offset

Automatically Configure to Unit’s Physical Locality

By selecting this option, the unit will compute the Time Zone Offset automatically based on the location of the unit provided by GPS receiver.

If you select this feature before the GPS receiver completes the position calculation, a message will be displayed to explain that this feature is not valid until the position is available.

If you select this feature after the GPS receiver determines its position, the computed Time

Zone Offset information will be shown.

Once this option has been selected and submitted, the NetClock software will determine the values for the appropriate manual fields. These manual definitions will be displayed when the defined clock is edited.

NOTE: Automatic time zone calculations are imprecise because the time zones are determined by local political boundaries that may change.

Manually Defined by UTC Offset

A dropdown box is provided (with definitions as appropriate) that permits the user to select a specific number of hours added or subtracted from UTC for the desired time zone.

NOTE: All of the Time Zone Offset drop-downs in the web browser user interface are configured as UTC plus or minus a set number of hours. For Eastern, choose UTC–5, for Central, choose UTC-6, for Mountain, choose UTC-7 and for Pacific, choose

UTC-8.

NetClock/GPS Instruction Manual 3-55

Model 9283 Spectracom Corporation

DST SETUP

Daylight Saving Time (DST) observance varies with locality and application. Choose the configuration that reflects your location and needs. Under the DST SETUP, you will see five choices:

• No DST rule, always standard time

• Automatically configure to unit’s physical locality

• Manually defined by region

• Manually defined by week and day

• Manually defined by month and day

No DST Rule, Always Standard Time

When this option is selected, the NetClock will not observe DST time changes.

Automatically Configure to Unit’s Physical Locality

When this option is selected, the NetClock software will observe and implement DST time changes automatically based on the unit’s physical location as determined by GPS positioning.

Once this option has been selected and submitted, the NetClock software will determine the values for the appropriate manual fields. These manual definitions will be displayed when the defined clock is edited.

Manually Defined by Region

From this dropdown box, the user may select commonly defined geographic regions that share

DST rules. There may be exceptions based on your location. The options include the following:

• Europe

• USA (thru 2006)

• USA (post 2006)

• Australia-1

• Australia-2

Select Europe if your location complies with the European DST Rule. This rule differs from all other rules because the DST changes occur based on UTC time, not local time. (All time zones in Europe change for DST at precisely the same time relative to UTC, rather than offset by local time zone.)

Select USA (thru 2006) if your location complies with the USA DST Rule and it is not yet the year 2007. The USA DST Rule changes in 2007.

NOTE: If you set your DST rule in 2006, you must change it manually on January 1, 2007.

Select

USA (post 2006) if your location complies with the USA DST Rule and it is the year 2007 or later.

Select Australia-1 if your location complies with the Australia-1 DST Rule (Australian Capital

Territory, New South Wales, South Australia, Tasmania, Victoria).

Select Australia-2 if your location complies with the Australia-2 DST Rule (Western Australia).

Manually Defined by Week and Day

This option is provided for advanced users. You can input start time, end time and the hour to change for the daylight saving. By selecting this option, the DST rule can be defined based on

3-56 NetClock/GPS Instruction Manual

Spectracom Corporation Model 9283 the weekday, week, and month of the local time you defined for this interface. Manual definitions are ALWAYS based on local time, not UTC.

Manually Defined by Month and Day

This option is provided for advanced users. You can input start time, end time and the hour to change for the daylight saving. By selecting this option, the DST rule could be defined based on the day and month of the local time defined for this Interface. If you select the February 29th as the start time or end time, the unit will respond that the entry is an illegal date. Manual definitions are ALWAYS based on local time, not UTC.

Example 1: To create a Local System Clock to UTC+1 with no DST rule:

Select Create/New and assign the clock a meaningful name.

Click on the “Manually Defined UTC Offset” button.

Select 'UTC+1:00' from the Time Zone pull down menu.

Select the 'No DST rule' radio button.

Review the changes made and click Submit. The browser will display the status of the change.

Example 2: To configure an RS-485 port to go in DST at 2:00am on the 3rd Friday in April and out of DST at 1:00am on the 1st Sunday in October, with a DST change of 1 hour:

Select Create/New and assign the clock a meaningful name.

Under “DST Setup”, select the 'Manually defined by week and day' radio button.

Enter/select '3rd', 'Friday', 'Apr', '2', and '0' in the DST In Date section.

Enter/select '1st', 'Sunday', 'Oct', '1', and '0' in the DST Out Date section.

Enter '1' and '0' in the corresponding fields of the Change Amount section.

Review the changes made and click Submit. The browser will display the status of the change.

Browse to the “Interface Setup, Remote Port” page and Select the proper System Clock.

Example 3: To change a Local System Clock to be in DST at 1:01am on October 2nd and out of DST at 2:00am on April 17th, with a DST change of 30 minutes:

Select the desired Clock Name.

Select the 'Manually defined by month and day' radio button.

Enter/select ‘2’, ‘Oct’, ‘1’, and ‘1’ in the DST In Date section.

NetClock/GPS Instruction Manual 3-57

Model 9283 Spectracom Corporation

Enter/select ‘17’, ‘Apr’, ‘2’, and ‘0’ in the DST Out Date section.

Enter ‘0’ and ‘30’ in the corresponding fields of the Change Amount section.

Review the changes made and click Submit. The browser will display the status of the change.

The unit will allow you to define different Time Zone and DST rules for different Interfaces and a front panel display (Option 02 if so equipped). In order to use this feature properly, users have to know the correct Time Zone Offset and DST rule for your area.

The general Time Zone and DST rule information can be found from the following web sites: http://www.worldtimeserver.com/ , http://webexhibits.org/daylightsaving/b.html

.

3.4.9 Setting the System Mode

The user may set the system mode from the Set System Mode screen (Figure 3-54). The system supports two modes of operation. These are single satellite mode and standard mode.

Use single satellite mode if you are using a window mount antenna and cannot receive at least four satellites. This will switch the qualification algorithm used, and allow the system to operate with a fewer number of satellites, but the accuracy and capabilities of the optional Rubidium

(Option 04) and OCXO (Option 05) oscillators will be decreased because of the poor GPS antenna visibility.

NOTE: Single satellite mode compromises the accuracy of the NetClock and the full capabilities of the optional OCXO and Rubidium oscillators. Always use standard mode if you are using a roof mount antenna and can obtain signals from at least four satellites. Standard mode is the factory default.

3-58 NetClock/GPS Instruction Manual

Spectracom Corporation Model 9283

Figure 3-54: System Mode Screen

3.4.10 Activating System Options and Rolling Back Updates

From the System Update screen (Figure 3-55), the user may activate system options and

“rollback” software updates, effectively returning the NetClock to its previous software version and configuration settings.

To activate system modem or security options, click the “Activate Option” box, choose the option you wish to activate, and enter the activation key provided by Spectracom before clicking

“Submit.”

To return the NetClock to its previous setup configuration (“Configuration”) or software version

(“Firmware”), click the appropriate selections and click “Submit.”

NOTE: The NetClock must be rebooted (Figure 3-56) for the active option and configuration/firmware rollback(s) to take effect.

NetClock/GPS Instruction Manual 3-59

Model 9283 Spectracom Corporation

Figure 3-55: System Update Screen

3-60 NetClock/GPS Instruction Manual

Spectracom Corporation Model 9283

3.4.11 Rebooting the System

The system can be rebooted from the System Reboot screen (Figure 3-56). Simply click the

“Reboot Now” button and wait for the NetClock to reboot.

Figure 3-56: System Reboot Screen

3.4.12 Configuring System Holdover

The user may set the system holdover from the System Holdover screen (Figure 3-57). The time interval between the loss of the primary external reference and the moment that the

NetClock declares loss of time synchronization is known as holdover. While the unit is in holdover mode, the time outputs are derived from an internal oscillator. Because of the internal oscillator, accurate time can still be derived even after the primary reference is removed. The more stable the oscillator is without an external reference, the longer this holdover period can be. The benefit of holdover is that time synchronization and the availability of the time outputs is not immediately lost when the reference is no longer available.

NetClock/GPS Instruction Manual 3-61

Model 9283 Spectracom Corporation

Figure 3-57: System Holdover Screen

The NetClock has a user configurable variable holdover period so that it can be adjusted for personal requirements and desires. A user can change the length of time that a unit waits in the holdover mode before loss of time synchronization. The holdover can be defined by a specific number of hours to wait, such as 4 hours and 30 minutes. It can also be defined by the estimated error. However, the estimated error feature is only enabled for the OCXO (Option 05) and Rubidium (Option 04) products.

The estimated error rates for each oscillator are listed below. These are used when displaying the current estimated error for the user and when calculating a new holdover length (Option 04 and Option 05 oscillators only).

3-62 NetClock/GPS Instruction Manual

Spectracom Corporation Model 9283

Oscillator Option

TCXO Standard

Estimated Error Rates

1.0 milliseconds / hour (nominal)

Time to reach 2 ms

2 hours (typical)

TCXO

OCXO

Standard 7.2 milliseconds / hour (worst case) 17 minutes

Option 05 72 microseconds / hour (nominal) 28 hours

Rb Option 04 0.18 microseconds / hour (nominal) 463 days

Table 3-6: Estimated Oscillator Error Rates

NOTE: The TCXO Error rate is a worst-case estimate and not typically this value. The nominal value assumed has been 1 millisecond / hour yielding 2 hours holdover times.

The OCXO and Rb oscillators use the nominal values for estimated error rate to calculate error at the end of holdover on the web browser user interface. The TCXO does not estimate error for holdover. But if it did, it probably should use the nominal value, which is more typical. Typically the error rates for a disciplined oscillator at 25 degrees Celsius will be lower than these values.

Limits on the minimum and maximum length of allowable holdover have been placed on each oscillator as shown below in Table 3-7.

Oscillator

TCXO

Minimum Length

15 minutes

Maximum Length

24 hours

OCXO (Option 05) 15 minutes

Rb (Option 04) 15 minutes

30 days

730 days (2 years)

Table 3-7: Minimum and Maximum Allowable Holdover Values

If the user sets the length below or above the limits or if the error is too small or large, the

NetClock will notify the user that this setting is outside its allowable parameters.

If the unit is currently in sync, the changes will take effect immediately. If the unit is in holdover, the changes will not take effect until the next holdover. To force the changes to take effect immediately, reboot the NetClock.

Time in Holdover displays either the amount of time that the NetClock has been in the holdover mode, or displays a phrase that the unit is not currently in the holdover mode. If the unit is currently in the holdover mode (Lost external reference but the unit is still “synchronized”), this field will show the number of days, hours, minutes and seconds that the unit has been in the holdover mode (Elapsed time from the last good external reference).

If the unit is not currently in holdover mode because it either currently receiving an external reference or because the variable holdover period has expired and the unit is no longer

“synchronized”, the phrase "Not In Holdover" is displayed instead.

NetClock/GPS Instruction Manual 3-63

Model 9283 Spectracom Corporation

3.4.13 Configuring System Logs

From the System Log Configuration screen (Figure 3-58), the user may configure remote Syslog servers with which the NetClock will communicate. Facilities and severities are defined by the

Syslog server and must be set up in the NetClock to match. The IP addresses and host names of the Syslog servers are entered on the bottom portion of the screen (Figure 3-59).

Figure 3-58: System Log Configuration Screen (1 of 2)

3-64 NetClock/GPS Instruction Manual

Spectracom Corporation Model 9283

Figure 3-59: System Log Configuration Screen (2 of 2)

NOTE: Any remote syslog server that is entered to receive log messages must be properly configured to accept incoming syslog messages.

NetClock/GPS Instruction Manual 3-65

Model 9283 Spectracom Corporation

3.4.14 Configuring and Testing Relays

The Relay menu groups the NetClock’s relay functions (Figure 3-60). From this menu, the user may access screens configure, test, and reset the relay outputs and event timers.

Figure 3-60: Relay Menu

The operational status can be monitored remotely using the TIMER/ALARM RELAYS connector on the rear panel. This connector provides the common, NO and NC contacts for three relays.

These relays can be connected to an alarm lamp, horn, or other indicator to warn when the clock accuracy or operation has been affected, or to signal the triggering of a programmed event. The relay contacts are rated at 2.0 amps, 30VDC.

The web browser user interface allows the assignment to each relay of one of three functions:

Major Alarm, Minor Alarm, and Event Timer.

To assign a function to a relay, click the radio button that lines up with both the function and the relay.The relay operation of all three relays can be tested at any time as desired. To test the relay operation, login as administrator mode and click on “test relays” in the left orange bar.

Chose the desired relay to be tested and then press submit. The selected relay should activate each time the submit button is pushed.

3-66 NetClock/GPS Instruction Manual

Spectracom Corporation Model 9283

NOTE: A single relay can only be assigned one function but a function can be assigned to multiple relays. By default, all three relays are assigned “Major Alarm.”

Figure 3-61: Relay Output Screen

The Event Timer Relay screen (Figure 3-62) and the Relay Current Event Scheduler screen

(Figure 3-64) allow for the configuration of 128 events that can turn on or off any one of the event timer relays. Make sure the rear panel relay that is going to be associated with an event is configured to be the event timer relay in order to use this feature.

If any events are already configured, they will be displayed by event number. There are no requirements on the order of the events; each one is completely independent of the others.

Enter the number of the event that you wish to edit/view and click the Edit/View button.

NetClock/GPS Instruction Manual 3-67

Model 9283 Spectracom Corporation

3-68

Figure 3-62: Event Timer Relay Screen

NetClock/GPS Instruction Manual

Spectracom Corporation Model 9283

Figure 3-63: Edit/View Event Timers

Choose a Time Zone

From the left menu, select “Set Event Clock.” Choose an already defined Clock (Time Zone) or define a new one

NetClock/GPS Instruction Manual 3-69

Model 9283 Spectracom Corporation

Note: All times entered for the Event Timers will use the same Local System Clock reference for Time Zone and DST rules. It is best to choose this reference first before entering your schedule.

Relay#: Select the relay number that the event is to be associated with.

Enabled/Disabled/Delete: If the event is enabled, the event will occur when scheduled. If the event is disabled, it will not occur at the scheduled time, but will still appear in the list of scheduled events on the previous page. If the event is deleted, all fields of event are cleared and it is removed from all event lists.

ON/OFF: Each event can turn the specified event timer relay on or off.

The next section of the page describes when the event will occur and how often it will occur.

The relay can be set to occur hourly, daily, weekly, monthly, and yearly.

Hourly: The event will happen every hour at the minute, second, and millisecond that is specified (within 100 milliseconds).

Daily: The event will happen every day at the hour, minute, second, and millisecond specified (within 100 milliseconds).

Weekly: The event will happen every week at the weekday, hour, minute, second, and millisecond specified (within 100 milliseconds).

Monthly: The event will happen every month at the day of month, hour, minute, second, and millisecond specified (within 100 milliseconds). If the day is set to be a day that isn't in short months, the event will happen on the last day of the short months.

Yearly: The event will happen every year at the month, day of month, hour, minute, second, and millisecond specified (within 100 milliseconds). If the month and day of month are programmed for February 29th (this can only be done while currently in a leap year), the event will happen on March 1 st

on non-leap years and February

29th on leap years.

NOTE: The Current Event Schedule (Figure 3-64) is a list of ENABLE events only. The events are ordered by next occurrence.

3-70 NetClock/GPS Instruction Manual

Spectracom Corporation Model 9283

Figure 3-64: Relay Current Event Scheduler Screen

NetClock/GPS Instruction Manual 3-71

Model 9283 Spectracom Corporation

From the Reset ALL Event Timers screen (Figure 3-65), the user may clear any set event timers.

Figure 3-65: Relay Reset ALL Event Timers Screen

3-72 NetClock/GPS Instruction Manual

Spectracom Corporation Model 9283

The Set Event Clock screen (Figure 3-66) allows the user to select the local system clock that drives the event function. The user may also access the create/edit local system clocks feature from this screen.

Figure 3-66: Set Event Clock Screen

NetClock/GPS Instruction Manual 3-73

Model 9283 Spectracom Corporation

Relay function can be tested from the Test Relays screen (Figure 3-67). Select one of the relays by clicking the radio button and test the selected relay by clicking Submit. If the relays are not connected to external devices, an audible clicking noise will emit from the NetClock.

This noise indicates the relays are responding to the test. If external devices are connected to the relays, testing a relay should cause the connected device to actuate. When the test is complete, the Web UI will display the message, “Relay [number] test complete.”

Figure 3-67: Test Relays Screen

3-74 NetClock/GPS Instruction Manual

Spectracom Corporation

3.4.15 Configuring Network Security

Model 9283

Figure 3-68: Security Menu

The Security menu groups the NetClock’s security functions (Figure 3-68). From this menu, the user may access screens to configure network security, file transfers, user accounts, SNMP features, LDAP features, and RADIUS features.

Spectracom 9300 series products use OpenSSH and OpenSSL. OpenSSH is the Open Source version of the Secure Shell; which provides a set of server side tools allowing secure remote telnet like access and secure file transfer using remote copy like (RCP) and FTP like utilities.

NetClock/GPS Instruction Manual 3-75

Model 9283 Spectracom Corporation

OpenSSL is the Open Source version of Secure Sockets Library; which is used to provide the encryption libraries. Together OpenSSH and OpenSSL provide industrial strength encryption allowing for secure remote administration via command line, HTTPS web pages and secure file transfers.

The user is permitted to enable or disable HTTPS and SSH. The secure product can be configured to allow access only via NTP and the secure protocols such as HTTPS or SSH or to operate in a less secure mode.

3-76

Figure 3-69: Security Network Screen (1 of 2)

NetClock/GPS Instruction Manual

Spectracom Corporation Model 9283

From the Security Network screen (Figure 3-69), the user may define the NetClock’s host name.

The DNS servers are set automatically if using DHCP and manually if not using DHCP. The same is true of the IP configuration. Certain information that must be entered on this screen should be obtained from your network administrator if it is not automatically filled in.

Figure 3-70: Security Network Screen (2 of 2)

NetClock/GPS Instruction Manual 3-77

Model 9283 Spectracom Corporation

3.4.15.1 Configuring SSH

SSH can be configured from the Security SSH screen (Figure 3-71). The tools supported are

SSH – secure shell, SCP – secure copy, and SFTP – secure file transfer protocol. The NetClock implements the server components of SSH, SCP, and SFTP.

For more information on OpenSSH, refer to www.openSSH.org.

SSH uses Host Keys to uniquely identify each SSH server. Host Keys are used for server authentication and identification. The secure Spectracom product permits users to create or delete RSA or DSA keys for the SSH2 protocol.

NOTE: Due to vulnerabilities in SSH1 protocol, it is not supported. Only SSH2 is supported.

3-78

Figure 3-71: Security SSH Screen (1 of 2)

NetClock/GPS Instruction Manual

Spectracom Corporation Model 9283

The user may choose to delete individual Host Keys. To delete a key simply select a radio button for the key you wish to delete and press submit at the bottom of the page.

If the user chooses to delete the RSA or DSA key, the SSH will function, but that form of server authentication will not be available. If the user chooses to delete both the RSA and DSA keys,

SSH will not function. In addition, if SSH Host Keys are being generated at the time of deletion, the key generation processes are stopped, any keys created will be deleted, and all key bit sizes are set to 0.

The user may choose to delete existing keys and request the creation of new keys, but it is often simpler to make these requests separately.

Figure 3-72: Security SSH Screen (2 of 2)

The user may create individual RSA and DSA Host Public/Private Key pairs. Host Keys must first be deleted before new Host Keys can be created. To create a new set of host keys first

NetClock/GPS Instruction Manual 3-79

Model 9283 Spectracom Corporation delete the old keys, then select the create host keys checkbox and enter the key sizes you desire. Then select the submit button at the bottom of the screen.

Spectracom secure products typically have their initial Host Keys created at the factory. The default key size for all key types is 1024. Host Key sizes can vary between 768 and 4096 bits.

The recommended key size is 1024. Though many key sizes are supported, it is recommended that users select key sizes that are powers of 2 or divisible by 2. The most popular sizes are

768, 1024, and 2048. Large key sizes up to 4096 are supported, but may take ten minutes or more to generate.

Host Keys are generated in the background. Creating RSA and DSA keys, each with 1024 bits length, typically takes about 30 seconds. Keys are created in the order of RSA, DSA and finally

RSA1. When the keys are created you can successfully make SSH client connections. If the unit is rebooted with Host Key creation in progress or the unit is booted and no host keys exist the key generation process is restarted. The key generation process uses either the previously specified key sizes or if a key size is undefined it defaults to 1024. A key with a zero length or blank key size field is not created.

Note also that when you delete a Host Key and recreate a new one, SSH client sessions will warn you that the host key has changed for this particular IP address. The user will either have to override the warning and accept the new Public Host Key and start a new connection or they may need to remove the old Host Public Key from their client system and accept the new Host

Public Key. Please consult your specific SSH client’s software’s documentation.

The SSH client utilities SSH, SCP, and SFTP allow for several modes of user authentication.

SSH allows the user to remotely login or transfer files by identifying the user’s account and the target machines IP address. Users can be authenticated by either using their account passwords or by using a Public Private Key Pair. Users keep their private key secret within their workstations or network user accounts and provide the NetClock a copy of their public key. The modes of authentication supported include:

• Either Public Key with Passphrase or Login Account Password

• Login Account Password only

• Public Key with Passphrase only

The first option allows users to login using either method. This is the default. Whichever mode works is allowed for logging in. If the Public Key is not correct or the Passphrase is not valid the user is then prompted for the login account password. The second option simply skips public/private key authentication and immediately prompts the user for password over a secure encrypted session avoiding sending passwords in the clear. Finally the last option requires the user to load a public key into the NetClock. This public key must match the private key found in the users account and be accessible to the SSH, SCP, or SFTP client program. The user must then enter the Passphrase after authentication of the keys to provide the second factor for 2factor authentication.

SSH using public/private key authentication is the most secure method of authenticating users for SSH, SCP or SFTP sessions.

The web browser user interface provides the means for the user to view and edit the authorized_keys file, to add Public Keys. Using FTP, SCP, or SFTP the user may also retrieve the authorized_keys file from the. ssh directory.

3-80 NetClock/GPS Instruction Manual

Spectracom Corporation Model 9283

An example of a user adding a public key to the authorized_keys file is shown below.

Users are required to create private and public key pairs on their workstation or within a private area in their network account. These keys may be RSA or DSA and may be any key bit length as supported by the SSH client tool. These public keys are stored in a file in the .ssh directory named authorized_keys. The file is to be formatted such that the key is followed by the optional comment with only one key per line. The file format, line terminations, and other EOL or EOF characters should correspond to UNIX conventions, not Windows.

If a user deletes all Public Keys Public/Private Key Authentication is disabled. If the user has selected SSH authentication using the “Public Key with Passphrase” option login and file transfers will be forbidden. The user must select a method allowing the use of account password authentication to enable login or file transfers using SCP or SFTP.

If a user wants to completely control the public keys used for authentication, a correctly formatted authorized_keys file formatted as indicated in the OpenSSH web site can be loaded onto a secure Spectracom product. The user transfers a new public key file using an insecure

FTP client or a secure SCP or SFTP client using only account password authentication. The user should place the new public key’s file in the .ssh directory.

Secure shell sessions using an SSH client can be performed using the admin or a user-defined account. The user may use Account Password or Public Key with Passphrase authentication.

The OpenSSH tool SSH-KEYGEN may be used to create RSA and DSA keys used to identify and authenticate user login or file transfers.

The following command lines for OpenSSH SSH client tool are given as examples of how to create an SSH session.

Creating an SSH session with Password Authentication for the admin account: ssh [email protected]

[email protected]'s password: admin123

The user is now presented with Boot up text and/or a “>” prompt which allows the use of the

Spectracom command line interface.

Creating an SSH session using Public Key with Passphrase Authentication for the admin account:

The user must first provide the secure Spectracom product a RSA public key found typically in the OpenSSH id_rsa.pub file. The user may then attempt to create an SSH session. ssh -i ./id_rsa [email protected]

Enter passphrase for key './id_rsa': mysecretpassphrase

Please consult the SSH client tool’s documentation for specifics on how to use the tool, select

SSH protocols, and provide user private keys.

3.4.15.2 Secure File Transfer

NetClocks provide secure file transfer using the SSH client tools SCP and SFTP. Authentication is performed using either Account Passwords or Public Key with Passphrase. However, unlike

SSH, in which the admin or a user-defined account is used, a special user account is provided

NetClock/GPS Instruction Manual 3-81

Model 9283 Spectracom Corporation named “SCP” for these tools. The “SCP” user account has the same password as the admin account. It differs from the admin account in that it does not run the Spectracom product shell. It is a limited account that only allows the user to transfer files to and from the product file system folder and to retrieve files from folders which the SCP account has read permission.

Some sample OpenSSH, SCP, and SFTP client commands are shown below.

1) Perform an SCP file transfer to the device using Account Password authentication scp authorized_keys [email protected]

:.ssh [email protected]'s password: admin123 (Always use same password as admin) publickeys 100% |***************************************************| 5 00:00

2) Perform an SCP file transfer from the device using Public Key with Passphrase authentication. scp -i ./id_rsa [email protected]

:.ssh

Enter passphrase for key './id_rsa': mysecretpassphrase publickeys 100% |***************************************************| 5 00:00

3) Perform an SFTP file transfer to the device using Account Password authentication. sftp [email protected] [email protected]'s password: admin123 (Always use same password as admin)

sftp>

The user is presented with the SFTP prompt allowing interactive file transfer and directory navigation.

4) Perform an SFTP file transfer from the device using Public Key with Passphrase authentication sftp -i ./id_rsa [email protected]

Enter passphrase for key './id_rsa': mysecretpassphrase

sftp>

The user is presented with the SFTP prompt allowing interactive file transfer and directory navigation.

NOTE: Use of SCP and SFTP is restricted to the administrator. To access SCP, enter the account name SCP with your administrator password. For SFTP, the account name is

SCP.

3-82 NetClock/GPS Instruction Manual

Spectracom Corporation Model 9283

3.4.15.3 Recommended SSH Client Tools

Spectracom does not make specific recommendations as to which specific SSH client, SCP client, or SFTP client tools. However, there are many SSH based tools available at cost or free to the user.

Two good, free examples of SSH tool suites are the command line based OpenSSH running on a Linux or OpenBSD x86 platform and the excellent (and free) putty SSH tool suite.

The OpenSSH tool suite in source code form is freely available at www.openSSH.org

though you must also provide an OpenSSL library, which can be found at www.openssl.org

.

The putty SSH tools and instructions regarding their use can be found at:

HTTP://www.chiark.greenend.org.uk/~sgtatham/putty/

The OpenSSL library provides the encryption algorithms used for secure HTTP (HTTPS)

(Figure 3-73). The OpenSSL package also provides tools and software, which is used to create x509 Certificate Requests, Self Signed Certificates and Private/Public Keys. The NetClock uses

OpenSSL library with a simple GUI interface to create certificate Requests and self-signed certificates. Users can then send these certificate requests to an external Certificate Authority

(CA) for the creation of a third party verifiable certificate or use an internal corporate CA. If a

Certificate Authority is not available the user can simply use the self-signed certificate that comes with the unit until it expires or create their own self-signed certificates to allow the use of

HTTPS.

NetClock/GPS Instruction Manual 3-83

Model 9283 Spectracom Corporation

Figure 3-73: Security HTTPS Screen (1 of 2)

NOTE: If the IP Address or Common Name (Host Name) is changed, you may wish to regenerate the security certificate. Otherwise you may receive security warnings from your web browser.

3-84 NetClock/GPS Instruction Manual

Spectracom Corporation Model 9283

Figure 3-74: Security HTTPS Screen (2 of 2)

Each Spectracom secure product comes with a default Spectracom self-signed certificate, which will outlast the product warranty. The typical expiration of the certificate is about 10 years.

HTTPS is available using this certificate until this certificate expires. If deleted however, this certificate cannot be restored.

NetClock/GPS Instruction Manual 3-85

Model 9283 Spectracom Corporation

For more information on OpenSSL please see www.openssl.org

.

The user can create a customer specific x509 self-signed certificate, an RSA private key and x509 certificate request using the web browser user interface. RSA private keys are supported because they are the most widely accepted. At this time DSA keys are not supported.

The user is required to select a signature algorithm, a private key passphrase of at least 4 characters, a private key bit length, the certificates expiration in days and at least one of the remaining fields. It is recommended that the user consult their Certificate Authority for the required fields in an x509 certificate request. Spectracom recommends all fields be filled out and match the information given to your certificate authority. For example, use all abbreviations, spellings, URLs, and company departments recognized by the Certificate Authority. This helps in avoiding issues with the Certificate Authority having issues to reconciling certificate request and company record information.

The Common Name field is the name of the host being authenticated. The Common Name field in the x509 certificate must match the hostname, IP address, or URL used to reach the host via

HTTPS. This field should be filled with the hostname or IP address of the NetClock. Spectracom recommends using a static IP address, because DHCP-generated IP addresses can change. If the hostname or IP address changes, the x509 certificate must be regenerated. If using only self-signed certificates, the user should choose the fields based on the company’s security policy.

Note that it can take several minutes for the certificate request, the private key, and self-signed certificate are created. The larger the key, the longer amount of time is required. It is recommended that a key bit length be a power of 2 or multiple of 2. The key bit length chosen is typically 1024, but can range from 512 to 4096. Long key bit lengths of up to 4096 are not recommended because they can take hours to generate. The most common key bit length is the value 1024.

The user is provided with several signature algorithm choices. The signature algorithm or message digest is most commonly MD5. Other secure options include SHA1 and RMD160.

Consult your Web Browser documentation and Certificate Authority for key bit lengths and signature algorithms supported.

If a system is rebooted during this time, the certificate will not be created. When the operation is completed, the user will see a certificate request in the certificate request text box. A digital file copy of the certificate request can be found in the root directory with the file name cert.csr. This file can be retrieved using FTP, SCP or SFTP. The certificate request can also be cut and paste from the certificate request text box on the web browser user interface.

3.4.15.5 Requesting Certificate Authority Certificates

Once the processing to create the certificate request, RSA private key and self-signed certificate is completed the web browser user interface will display the certificate request.

The user can submit this certificate request to the company’s Certificate Authority for a real verifiable, authenticable third party certificate. Until this certificate is received the user’s selfsigned certificate displaying the information shown above can be used.

3-86 NetClock/GPS Instruction Manual

Spectracom Corporation Model 9283

The NetClock will load this new self-signed certificate and private key after the user selects a few more web page options or when the user selects the “Exit connection to product” button at the top of the screen. The user will see a pop up window in Windows operating systems. The certificate and be installed or viewed using this pop up window. Other operating systems may vary in how they install and accept certificates. External Internet access may be required by your Certificate Authority to verify your third party certificate.

3.4.15.6 Installing Certificates

After your Certificate Authority issues you a Certificate you need to install it on the secure

Spectracom product. Certificates may be installed via the web browser user interface and stored. Or they may be copied to the root directory using file transfer and installed using the web browser user interface.

The user needs to cut and paste the certificate into the Update Certificate text box and select the checkbox. The user then enters submit at the bottom of the page and the current self-signed certificate is overwritten.

If the file transfer method is chosen FTP, SCP, SFTP may be used to copy the certificate text file to the root directory using any file name. The user then selects the “Update Certificate with file named” check box and enters the file name in the space. The user then enters submit at the bottom of the page and the current self-signed certificate is overwritten with the specified file name.

In both cases the secure Spectracom product’s web server loads this new self-signed certificate and private key after the user selects a few more web page options or when the user selects the

“Exit connection to product” button at the top of the screen.

3.4.15.7 Using Externally Generated Certificates

The user is provided with another means to load certificates onto the secure Spectracom product supported. The certificate must be in PEM format.

The user may install the externally generated certificate using the web browser user interface.

The certificate can also be installed using file transfer and the web browser user interface. The user simply needs to transfer the certificate file to the root directory using either SCP or SFTP.

Once the file is transferred, the user simply selects the “Update Certificate with file named” checkbox and provides the file names. The user then enters the submit button.

In both cases the secure Spectracom product’s web server loads this new self-signed certificate after the user selects a few more web page options or when the user selects the “Exit connection to product” button at the top of the screen.

To successfully use this means of certificate generation the user must correctly create a certificate which complies with the requirements of the currently used OpenSSL release.

3.4.16 If You Cannot Access a Secure NetClock

Spectracom assumes that the customer is responsible for the physical security of the product.

Spectracom secure products are required to be locked in a secure enclosure, cabinet or room.

Unauthorized persons are not to be given access to the product nor should a serial cable and

NetClock/GPS Instruction Manual 3-87

Model 9283 Spectracom Corporation terminal program be attached unless the system administrator is configuring or performing maintenance.

If your company disables HTTPS, loses the system passwords, allows the certificate to expire, deletes the certificate the certificate and private keys and deletes the Host Keys or forgets the

Passphrase access to the secure Spectracom product can become denied.

To restore access to your system you must utilize the setup port to restore the admin accounts default password. The admin account can then be used to enable HTTP using the “net HTTP” command. Contact Spectracom Technical Support for details on how to do this.

3.4.17 Configuring User Accounts

3-88

Figure 3-75: Security User Account Screen

NetClock/GPS Instruction Manual

Spectracom Corporation Model 9283

From the Security User Account screen (Figure 3-75), the user may create and assign privileges to up to 16 local users. Click “Create/New” and “Submit” to create and assign privileges to users

(Figure 3-76).

NetClock/GPS Instruction Manual 3-89

Model 9283 Spectracom Corporation

3-90

Figure 3-76: Security User Account Screen (Assigning Privileges)

NetClock/GPS Instruction Manual

Spectracom Corporation Model 9283

Figure 3-77: SNMP Security Screen (1 of 3)

3.4.18 Configuring SNMP v1, v2, and v3

From the SNMP Security screen (Figure 3-77), the user can define the network locations, hostnames, and protocols used in communicating with SNMP v1, v2, and v3 users. (SNMP v3 is secure SNMP.)

NOTE: Usernames are arbitrary. The username must be the same on the unit and on the management station.

NetClock/GPS Instruction Manual 3-91

Model 9283 Spectracom Corporation

NOTE: When selecting an engine ID for SNMPv3, pick an arbitrary hexadecimal number (such as 0x1234).

Figure 3-78: SNMP Security Screen (2 of 3)

3-92 NetClock/GPS Instruction Manual

Spectracom Corporation Model 9283

Figure 3-79: SNMP Security Screen (3 of 3)

NetClock/GPS Instruction Manual 3-93

Model 9283 Spectracom Corporation

Figure 3-80: Security LDAP General Screen

3-94 NetClock/GPS Instruction Manual

Spectracom Corporation Model 9283

3.4.19 Configuring LDAP and RADIUS

From the Security LDAP General screen (Figure 3-80), the user chooses the LDAP server type

(it must be the correct one – check with your LDAP server administrator if you are not sure) and choose the types of services allowed to request authentication from the LDAP server.

Figure 3-81: Security LDAP Client Configuration Screen (1 of 2)

From the LDAP Client Configuration screen, the user specifies the addresses or hostnames of the LDAP server(s) and inputs other fields that must be provided by the LDAP server administrator. One of the servers (and one only) must be defined as the main LDAP server. The other servers are replicas.

NetClock/GPS Instruction Manual 3-95

Model 9283 Spectracom Corporation

Figure 3-82: Security LDAP Client Configuration Screen (2 of 2)

If “Enable SSL for simple authentication” is not clicked, clear text is sent to the LDAP server. If

SSL is checked, text sent to the LDAP server is encrypted.

A sample configuration for an OpenLDAP server would be as follows:

DN for search base dc=spectracomcorp,dc=com

Bind password

Search filter

Login attribute

DN for password test objectclass=posixaccount uid ou=people,dc=spectracomcorp,dc=com?one

Group DN cn=engineer,ou=group,dc=spectracomcorp,dc=com

Group member attribute member

3-96 NetClock/GPS Instruction Manual

Spectracom Corporation Model 9283

A sample configuration for Active Directory would be as follows:

DN for search base

Bind DN dc=test,dc=spectracomcorp,dc=com cn=administrator,cn=users,dc=test,dc=spectracomcorp,dc=com

Bind password

Search filter

Login attribute

DN for password test objectclass=User sAMAccountName ou=users,dc=test,dc=spectracomcorp,dc=com?one

Group DN cn=engineer,cn=users,dc=test,dc=spectracomcorp,dc=com

Group member attribute member

Figure 3-83: Security RADIUS General Screen

From the Security RADIUS General screen (Figure 3-83), the user selects the services that may use RADIUS for authentication.

NetClock/GPS Instruction Manual 3-97

Model 9283 Spectracom Corporation

Figure 3-84: Security RADIUS Client Configuration Screen

From the Security RADIUS Client Configuration screen (Figure 3-84), the user identifies the addresses of the network’s RADIUS servers. From this screen, the user also specifies the number of re-transmit attempts (0 to 3) that will be made in communicating with the RADIUS server.

3-98 NetClock/GPS Instruction Manual

Spectracom Corporation Model 9283

3.4.20 Configuring IPSec

Internet Protocol Security (IPSec) is a suite of IP protocols that authenticates and encrypts network communications. IPSec supports IPv6 and IPv4 as of this writing.

IPSec defines a Security Association (SA), consisting of secured communications between two network devices. Configuring IPSec requires us to define SA Policy (SAP) and SA Descriptors

(SAD). SAP determines what network traffic can or must be secured through IPSec. SAD describes actively secured conversations. All network traffic for an SA contains an identical

Security Parameter Index (SPI).

3.4.20.1 AH vs. ESP

An Authentication Header (AH) and an Encapsulating Security Payload (ESP) are the primary protocols used by IPSec. They authenticate (AH) or authenticate and encrypt (ESP) the data across that connection. Typically, they are used independently, but it is possible to use them together. The NetClock supports both protocols.

3.4.20.2 Transport Mode vs. Tunnel Mode

Transport mode provides a secure connection between two endpoints by encapsulating the IP payload. Tunnel mode encapsulates the entire IP packet/

NOTE: Tunnel mode is used to form a traditional Virtual Private Network (VPN), in which the tunnel creates a secure path across a distrusted Internet connection. The NetClock supports Transport mode ONLY.

3.4.20.3 MD5 vs. SHA-1 vs. DES vs. 3DES vs. AES

An IPSec connection can use two or three encryption choices from among those available.

Authentication calculates an Integrity Check Value (ICV) over the data packet’s contents. It is usually built on a hash algorithm (for example, MD5 or SHA-1). It uses a secure key known to both endpoints, allowing the recipient to compute the ICV as the sender has computed it. If the recipient gets the same value, the sender has effectively authenticated itself.

3.4.20.4 IKE vs. Manual Keys

To communicate, the devices at both endpoints must possess the same secure keys. Keys can be entered manually. They may also be generated dynamically between two hosts through

Internet Key Exchange (IKE). The NetClock supports both IKE and manual keys.

3.4.20.5 Main Mode vs. Aggressive Mode

The initial IKE exchange may be efficient or it may be secure. This tradeoff is governed by the exchange mode, Main or Aggressive. Main mode is completely secure and requires six packets to be sent between the two devices. Aggressive mode requires only three packets be sent between the two devices, but it is less secure.

NOTE: The NetClock supports both Main and Aggressive modes. Aggressive mode is NOT recommended because of the security risks involved.

NetClock/GPS Instruction Manual 3-99

Model 9283 Spectracom Corporation

3.4.20.6 Configuring IPSec (IKE SA)

To establish an IPSec connection between the Spectracom Netclock and an IPv4 addressed host (“A”) using IKE SA configuration, we must first configure the IPSec IKE to communicate with host A. To do this, navigate to the IPSEC IKE SA Configuration screen (Figure 3-85).

3-100

Figure 3-85: IPSEC IKE SA Configuration Screen (1 of 2)

NetClock/GPS Instruction Manual

Spectracom Corporation Model 9283

Figure 3-86: IPSEC IKE SA Configuration Screen (2 of 2)

3.4.20.6.1

IKE Phase 1 Configuration

Exchange Mode defines the mode for Phase 1 (when the IKE daemon is the initiator). You may select all three options (meaning the NetClock supports Main, Aggressive, and Base exchange modes) or you may select one or two modes to support. The IKE daemon uses the Main exchange mode when it is the initiator.

Life Time defines the lifetime of the Phase 1 SA proposal.

NetClock/GPS Instruction Manual 3-101

Model 9283 Spectracom Corporation

DH group defines the group used for Diffie-Hellman exponentiations. This directive must be defined using one of the following:

Group 1 - Modp768

Group 2 - Modp1024

Group 5 - Modp1536

Grouip 14 - Modp2048

NOTE: When using Aggressive mode, the DH group defined for each proposal must be the same.

Encryption Algorithm specifies the algorithm used for Phase 1 negotiation. Choose DES,

3DES, or AES as desired (or as specified by your network administrator).

Hash Algorithm defines another algorithm used for Phase 1 negotiation. Select HMAC-MD5 or

HMAC-SHA1 as desired or required.

Authentication Method defines the means of Phase 1 authentication used (preshared keys or

X.509 certificates).

Preshared Keys

The easiest way to authenticate using the IKE daemon is through preshared keys. These keys must be defined in a file uploaded to the location specified in the Using Preshared key located in field.

NOTE: After the file is uploaded, its file privileges will be changed automatically to deny unauthorized users access to the preshared keys. This means you will not be able to access the file after uploading it. Always keep an extra copy of the file on hand in another location.

The preshared key file should have the following syntax:

192.168.2.100 password1

5.0.0.1 password2

3ffe:501:ffff::3 password3

This file is organized in columns. The first column holds the identity of the peer authenticated by the preshared key. The second column contains the keys.

X.509 Certificates

The IKE daemon supports the use of X.509 certificates for authentication. Spectram supplies two means of providing the public/private key pair to the Netclock.

The first approach is through the user interface on the IPSec IKE SA Configuration screen.

Specify the Certificate Files Path and Peer’s Certificate File name, then select Md5 or Sha1 to specify the Signature Algorithm. You must also specify the RSA Private Key Length to use when generating the key pair.

3-102 NetClock/GPS Instruction Manual

Spectracom Corporation Model 9283

Alternatively, you may generate elsewhere and upload to the NetClock your key pair(s). Specify the directory and the name of the key pairs uploaded to it. Regardless of the method used, however, you must upload the peer’s public key to the NetClock and provide the directory and file name to the NetClock in the IPSec IKE SA Configuration screen.

3.4.20.6.2 IKE Phase 2 Configuration

Life Time defines how long an IPSec SA will be used.

Encryption Algorithm defines the group used for Diffie-Hellman exponentiations. This directive must be defined using one of the following:

Group 1 - Modp768

Group 2 - Modp1024

Group 5 - Modp1536

Grouip 14 - Modp2048

NOTE: When using Aggressive mode, the DH group defined for each proposal must be the same.

Encryption Algorithm specifies the algorithm used for Phase 2. Select DES, 3DES, AES (used with ESP) or NULL as desired (or as required by your network administrator).

Authentication Algorithm defines another algorithm used for Phase 2. Select HMAC-SHA1 or

HMAC-MD5 as desired or required.

Compression Algorithm defaults to “deflate.” It is not configurable at this time.

NOTE: After completing and submitting changes in the IPSec IKE SA Configuration screen, check to make sure IPSec is enabled and IKE is selected for use with IPSec. The IKE

Log (refer to Logs and Status Reporting) is helpful in troubleshooting this condition.

3.4.20.6.3

Configure IPSec Security Policy

Configure the IPSec security policy from the IPSec General screen (Figure 3-87).

NOTE: Always configure IKE BEFORE enabling the IKE option from the IPSec General screen. If IKE is not configured, the IKE daemon won’t start correctly when the

Security Association is enabled.

From the IPSec General screen (Figure 3-87), enable (or disable) the IPSec service and specify the Security Association (IKE if already configured, or Manually Configure). In the Security

Policy table, input the NetClock’s IP address as the Source IP and host A’s address as the

Destination IP.

NetClock/GPS Instruction Manual 3-103

Model 9283 Spectracom Corporation

Figure 3-87: IPSec General Screen

Select ANY as the desired protocol to apply for IPSec security protection (unless a specific protocol is desired; these can be selected from the drop-down list).

Select Both for the Direction, which means IPSec security protection is required for both incoming and outgoing packets. Security protection may also be applied to incoming packets only, or to outgoing packets only (from the drop-down list).

Select Ipsec to use IPSec as the security policy. (You may also select None or Discard.

Selecting None means that IPSec operation will not take place on the packet, while selecting

Discard means the packet matching indexes will be discarded.

3-104 NetClock/GPS Instruction Manual

Spectracom Corporation Model 9283

You may choose to check either or both AH and ESP to set them as Require, Use, Default, or

Unique.

Default means the kernel consults the system-wide default for the protocol specified.

Use means the kernel uses an SA if it is available, while the kernel keeps normal operation otherwise.

Require means an SA is required whenever the kernel sends a packet matched with the policy.

Unique is the same as Require, but allows the policy to match the unique outbound SA.

NetClock/GPS Instruction Manual 3-105

Model 9283 Spectracom Corporation

3.4.20.7 Configuring IPSec (Manual SA)

To establish an IPSec connection between the NetClcok and an IPv6 addressed host (“B”) using manual SA configuration, refer to the IPSec Manual SA Configuration screen (Figure

3-88).

3.4.20.7.1

Manual Security Associations

Input the NetClock IP address as the Source IP and host B’s IP address as the Destination IP.

3-106

Figure 3-88: IPSec Manual SA Configuration (1 of 2)

NetClock/GPS Instruction Manual

Spectracom Corporation Model 9283

The Security Parameter Index (SPI) must be a hexadecimal number without the “0x” prefix.

Enter the desired values manually.

NOTE: SPI values between 0 and 255 are reserved and cannot be used at this time.

Make sure to check the AH or ESP boxes for the key configurations used. If the appropriate box is not checked, information following the AH or ESP inputs will be ignored by the update page.

Figure 3-89: IPSec Manual SA Configuration (2 of 2)

NetClock/GPS Instruction Manual 3-107

Model 9283 Spectracom Corporation

3.4.20.7.2

Configure IPSec Security Policy

Configure the IPSec security policy from the IPSec General screen (Figure 3-90).

NOTE: The manual SA values must be configured BEFORE the manual SA option is enabled from the IPSec General screen (Figure 3-90). If the feature is enabled before it is configured from the IPSec Manual SA Configuration screen, the SA and SP tables will not update correctly.

3-108

Figure 3-90: IPSec General Screen

NetClock/GPS Instruction Manual

Spectracom Corporation Model 9283

Select ANY as the desired protocol to apply for IPSec security protection (unless a specific protocol is desired; these can be selected from the drop-down list).

NOTE: When using IKE over IPv6, do NOT select ANY. There are protocols that do not work well with IKE under IPv6 with IKE. Select one of the specific protocols listed in the dropdown menu, as desired or required.

Select Both for the Direction, which means IPSec security protection is required for both incoming and outgoing packets. Security protection may also be applied to incoming packets only, or to outgoing packets only (from the drop-down list).

Select Ipsec to use IPSec as the security policy. (You may also select None or Discard.

Selecting None means that IPSec operation will not take place on the packet, while selecting

Discard means the packet matching indexes will be discarded.

You may choose to check either or both AH and ESP to set them as Require, Use, Default, or

Unique.

Default means the kernel consults the system-wide default for the protocol specified.

Use means the kernel uses an SA if it is available, while the kernel keeps normal operation otherwise.

Require means an SA is required whenever the kernel sends a packet matched with the policy.

Unique is the same as Require, but allows the policy to match the unique outbound SA.

NetClock/GPS Instruction Manual 3-109

Model 9283

3.4.21 Logs and Status Reporting

Spectracom Corporation

Figure 3-91: Status and Log Menu

The Status and Log menu groups the NetClock’s status and log access screens. From this menu the user can view system logs and monitor that status of the NetClock’s GPS signal. The user may also view system and NTP statuses from this menu.

NOTE: The times indicated in all log entries are UTC (no correction for local time or Daylight

Saving Time).

Four iterations of each log are kept locally on the NetClock, with the oldest rotated out (deleted) as a fifth log is generated. Logs can be up to 75K in size individually. This means that 300K of storage is devoted to each log.

3-110 NetClock/GPS Instruction Manual

Spectracom Corporation Model 9283

Figure 3-92: Alarm Log Screen

The Alarm Log (Figure 3-92) is a running list of the alarms (with descriptive information) experienced by the NetClock.

NetClock/GPS Instruction Manual 3-111

Model 9283 Spectracom Corporation

The Authorization Log (Figure 3-93) is a running list of authenticated users who have accessed the NetClock.

Figure 3-93: Authorization Log Screen

3-112 NetClock/GPS Instruction Manual

Spectracom Corporation Model 9283

Figure 3-94: Event Log Screen

The Event Log (Figure 3-94) is a running list of the event timer relay activity.

NetClock/GPS Instruction Manual 3-113

Model 9283 Spectracom Corporation

The GPS Qualification Log (Figure 3-95) is a running list of the NetClock’s GPS satellite signal activity.

Figure 3-95: GPS Qualification Log Screen

3-114 NetClock/GPS Instruction Manual

Spectracom Corporation Model 9283

Figure 3-96: Journal Log Screen

Whenever a user changes the NetClock’s configuration, the change (who performed it and what the change was) is recorded in the Journal Log (Figure 3-96).

NetClock/GPS Instruction Manual 3-115

Model 9283 Spectracom Corporation

Figure 3-97: NTP Log Screen

The NTP Log (Figure 3-97) is a running list of NTP activity on the NetClock.

3-116 NetClock/GPS Instruction Manual

Spectracom Corporation Model 9283

Figure 3-98: IKE Log Screen

The IKE Log (Figure 3-98) is useful for troubleshooting the status of the IPSec IKE SA configuration.

NetClock/GPS Instruction Manual 3-117

Model 9283 Spectracom Corporation

Figure 3-99: Operational Log Screen

The Operational Log (Figure 3-99) is a running list of NetClock operations, such as system updates and clock synchronizations.

3-118 NetClock/GPS Instruction Manual

Spectracom Corporation Model 9283

Figure 3-100: Oscillator Log Screen

The Oscillator Log (Figure 3-100) is a running list of the NetClock’s oscillator activity.

NetClock/GPS Instruction Manual 3-119

Model 9283 Spectracom Corporation

Figure 3-101: System Log Screen

The System Log (Figure 3-101) is a running list of system information and status messages that may be used by factory personnel for troubleshooting. This log records internal system information that is not intended for customer use.

3-120 NetClock/GPS Instruction Manual

Spectracom Corporation Model 9283

Figure 3-102: Update Log Screen

The Update Log (Figure 3-102) is a running list of software updates performed on the NetClock.

Software updates are performed using a utility program provided by Spectracom.

NetClock/GPS Instruction Manual 3-121

Model 9283 Spectracom Corporation

Figure 3-103: GPS Signal Status Screen

The GPS Signal Status screen (Figure 3-103) provides insight into the GPS receiver’s operation and the signal quality from the satellites. This information is useful to verify proper antenna placement and receiver performance during installation and later troubleshooting. The page describes the number of satellites being tracked and will indicate that the NetClock is “acquiring” if it is still searching for qualified satellites. “Bad Geometry” means the number or position of satellites being tracked is not sufficient to calculate position. A “2D Fix” means the receiver is tracking at least three qualified satellites, while a “4D Fix” means the receiver is tracking at least four satellites. “Position Hold” means the GPS receiver has collected enough information to

3-122 NetClock/GPS Instruction Manual

Spectracom Corporation Model 9283 determine its location. Some other terms you will encounter on the GPS Signal Status screen include:

Antenna Sense = SSSSS

SSSSS reports the status of the antenna sense circuit. There are three main flags (OK, Over

Current, and Under Current). The three flags are described here:

OK Flag

The OK flag is displayed if both antenna sense bits are cleared. This indicates that the antenna is drawing current within the normal range.

Over Current Flag

This flag is displayed if the over current bit is set. This indicates that too much current is being drawn through the circuit and the overload protection circuit is limiting the feed current. The receiver will attempt to continue the normal acquisition and tracking process regardless of the antenna status.

Under Current Flag

This flag is displayed if the undercurrent bit is set. This indicates that little or no current is being drawn through the circuit, which may be due to a disconnected antenna, a severed antenna cable or a damaged antenna. The receiver will attempt to continue the normal acquisition and tracking process regardless of the antenna status.

Undercurrent indication < 8 mA

Overcurrent indication > 80 mA

NOTE: This condition will also be present if a GPS antenna splitter that does not contain a load to simulate an antenna being present is being used.

Latitude = [N:S][DD MM SS.SSSS]

Longitude = [E:W][DDD MM SS.SSSS]

Where: N = North latitude

S = South Latitude

E = East Longitude

W = West Longitude

D = Degree

M = Minute

S = Second

Quality = QQQQQ

QQQQQ = Result of GPS qualification, either PASSED or FAILED. The GPS signal is considered qualified when at least one satellite is received having a vehicle ID of at least 4 that are available for Position Fix Usage while in the normal mode of operation (Or at least 1 satellite that is available for position fix when the unit is single satellite mode).

Information on each satellite the receiver is currently tracking is presented in table form. The table columns are described below:

CHANNEL = Channel Number of the GPS receiver, 1…12

VID = Vehicle (satellite) Identification Number, 1…37

NetClock/GPS Instruction Manual 3-123

Model 9283 Spectracom Corporation

STRENGTH = Signal strength value relative to the Signal to Noise Ratio [SNR]. Range:

0…255, the higher the number, the greater the receiver signal.

NOTE: The NTP Status screen (Figure 3-104) is discussed in the Configuring NTP section of this manual.

Figure 3-104: NTP Status Screen

The System Status screen (Figure 3-105) consists of four sections that provide the user with the software revision levels, the current time synchronization status, the results of internal unit testing, and the features and options that are currently enabled and disabled.

NOTE: The NTP Reference Status lines bear different colors for different codes. Red is a reject (the peer is discarded as unreachable). Yellow is an outlyer (the peer is discarded by the clustering algorithm). Green is a candidate (the peer is a survivor and a candidate for the combining) or a syspeer/ppspeer (the peer has been declared the system peer and lends its variables to the system variables).

3-124 NetClock/GPS Instruction Manual

Spectracom Corporation Model 9283

Figure 3-105: System Status Screen (1 of 2)

The Dynamic System Information section contains the elapsed time that the unit has been powered-up for, the internal temperature of the unit, the status of the major and minor alarms, the current time synchronization status and the current external reference identifier.

Time Source The time source field contains the current source for time input. The possible inputs are as follows:

NetClock/GPS Instruction Manual 3-125

Model 9283 Spectracom Corporation

Figure 3-106: System Status Screen (2 of 2)

None – No Time Source has been found after startup.

GPS – The GPS receiver is the Primary Time Source for the Models 9283 and 9189.

Modem – When Option 03 is installed, the Modem maybe used as a Primary Time Source or

Secondary (backup) Time Source to GPS for the Model 9283.

3-126 NetClock/GPS Instruction Manual

Spectracom Corporation Model 9283

User – The Time Source is the result of the user setting the time from the System Setup/System

Time web browser user interface page when no Time Source is present.

The Static System Information section of the System Status screen provides the software revisions, the NetClock’s Serial Number, and the MAC address.

The System Test Results section contains the results of the internal tests that are run. These test are not complete checks of the entire paths (For example, the Serial port may pass even though it has been damaged by a surge).

GPS Startup Self-Test – The GPS Startup Self-Test will indicate the status of the antenna, antenna cable and the GPS receiver at the time of power-up only. If the antenna cable was not connected, shorted or open at the time of power-up, and/or if there is a problem with the GPS receiver or antenna or both at the time of power-up, this test will indicate FAILED. “Antenna

UC” means the antenna was not connected and “Antenna OC” indicates there was a short in the cable at the time of power-up. “Antenna NV” means an unknown antenna problem existed at power-up. “GPS & Antenna” means that both GPS receiver and Antenna problems were detected at power-up.

GPS Antenna Sense – The GPS Antenna Sense is a current status of the antenna, antenna cable and the GPS receiver. If the antenna cable is currently not connected, shorted or open, and/or if there is a problem with the GPS receiver or antenna or both, this test will indicate

FAILED. “Antenna UC” means the antenna is not currently connected and “Antenna OC” indicates a short in the cable. “Antenna NV” means an unknown antenna problem. “GPS &

Antenna” means that both GPS receiver and Antenna problems were detected.

Modem Test (Applicable only to units with Option 03 installed) – The Modem Test will indicate

“Console Mode” if the Serial Setup Interface is set to Console mode instead of Client mode.

This indicates that the modem is not currently being used. If the modem feature is desired, in the modem configuration page, change the mode to Client mode.

When the NetClock initially boots up, the mode is set to Serial Setup Interface. When the mode is set to Modem and before every modem dial-out call, the modem is sent a command. If the unit gets a response from the modem, the field is set to PASSED. If the unit gets no response or a bad response from the modem, then the field is set to FAILED and the reason is indicated as shown below:

Reasons:

Not Found – There is no modem connected, the modem is incorrectly connected, or it is not turned on.

Modem Error – The modem gave a response indicating an unspecified problem.

The System Features and Options section provides the current status of all the features and options that are available for your particular NetClock. Features that are currently turned on will indicate “ENABLED”. Features that indicate “DISABLED” are not enabled. However, the disabled features may be “enabled” after the original purchase. If an option, which is enabled, fails to correctly initialize and become ready to be used its status is ERROR.

Option 03 can be enabled in the field (Options 04 and 05 must be purchased with the unit when it is initially ordered). With the future purchase of the Modem option (Option 03), we will

NetClock/GPS Instruction Manual 3-127

Model 9283 Spectracom Corporation provide a “key hash” that will enable the feature to be turned on. Please contact our Sales department to purchase the option.

The purchase price of the modem option includes the cost for the modem as well as the key to enable the feature. The modem selection is very limited in compatibility. Not all available modems are compatible with the Model 9283 (Must be configured as Hayes AT) so we will supply you with a modem when the option is purchased. If the modem option was not initially purchased, contact our Sales department to purchase the modem option. Refer to Options for more information.

3-128 NetClock/GPS Instruction Manual

Spectracom Corporation Model 9283

4 Operation

Operation of the 9200 series NetClock is relatively intuitive and requires little operator intervention during normal network operations.

4.1 Front Panel

The front panel of the NetClock consists of one Ethernet connector which has two small indicator lamps, two main status LED’s and two LCD displays. The two status lights are “Sync” and “Power”. The LCD’s are configurable to display various time, data, version information formats. Refer to Figure 4-1 for a picture of the front panel.

The Spectracom NetClock has two main status LEDs present on the front panel. These status lights provide the user with the indication that power is applied to the unit (Power LED) and that the NetClock is currently synchronized or not synchronized (Sync LED). The power light will be blank if power is not applied or green if power is applied. The Sync light has many states to indicate the current status of the unit.

The Ethernet connector provides an interface to the network for NTP synchronization and to obtain access to the Web Browser. The Ethernet connector has two small indicator lights just above the connector. These lights are known as Good Link (Green LED) and Activity (Orange

LED). The Good Link light indicates a connection to the network is present. The activity light will blink when network traffic is detected.

The states of the Power, Sync and Ethernet LED’s are listed in Section 4.1.1.

Figure 4-1: Front Panel Display

At power up, a quick LED test is run. The unit displays a RedGreen – Orange sequence to ensure the operation of the LEDs.

The table on the following page describes the operation of the LEDs. In this table, the terms

Blink” and “Flash” are used.

Blink is defined as ½ second on, ½ second off

Flash is defined as

1 /

20

second on,

19 /

20 second off

NetClock/GPS Instruction Manual 4-1

Model 9283 Spectracom Corporation

POWER Green On

Off

SYNC Multi Off

Power is supplied to the NetClock.

Power is disconnected.

No fault but not synchronized to GPS.

Holdover spec has not been met.

Green On Synchronized to GPS. Time is valid and within the Locked to GPS accuracy specs.

Blinking

Green

Holdover mode. Not synchronized to GPS but time is still within Holdover accuracy specs. Also indicates the unit is synchronized with the optional dial-out modem (Option 03).

Yellow On No longer synchronized to GPS but no unit fault. Time accuracy may not be meeting holdover specs.

Blinking

Yellow

Unit is in power-up initialization mode. The unit is in this mode for the brief period between power on and when it is operationally ready to receive satellite data.

Flashing

Red

Ethernet

(left)

Yellow On

Off

GPS antenna fault. This flash may occur over any of the other color conditions at runtime.

Red On Unit fault. Time may not be valid. Overrides all other indicators.

Blinking

Red

If the unit fails Power On Self Test (POST) then the indicator will blink in a sequence indicating the failure code (consult factory)

LAN Activity detected.

No LAN traffic detected.

Ethernet

(right)

Green On

Off

LAN Link established 10 or 100 Mb/s.

No link established.

Table 4-1: Status Indicators

4.2 Rear Panel

The rear panel provides several different outputs that are available for interfacing the NetClock to various systems as well as a means of initially configuring the unit’s network settings. The rear panel also has a power jack for the power input, a connection for the GPS antenna and relay contacts for alarm monitoring and event alerts. Refer to Figure 4-2: for a drawing of the rear panel.

4-2 NetClock/GPS Instruction Manual

Spectracom Corporation Model 9283

The GPS Antenna connection is an “N” type connector for the GPS input from the antenna.

The power jack is the input for the DC power.

There are three configurable alarm/event relays ( Relays 1, 2, 3) available for remote alerts and

monitoring.

The Serial Setup Interface provides network and output port configuration capability.

The two RS-485 connectors ( RS-485 ports 1 and 2) provide an RS-485 data output for synchronizing devices that accept an RS-485 input, such as wall display clocks and add-on

Model 9188 Ethernet Time Servers.

Serial Comm 1 and Serial Comm 2 are “DB9 female” connectors that provide RS-232 data output to devices that can accept an RS-232 input for synchronization.

IRIG is a BNC output that provides an IRIG signal for synchronizing certain model voice recorders.

1PPS is a BNC output providing a once-per-second squarewave output.

FREQ OUT is a BNC output providing a 10MHz sinewave output.

FREQ OUT 1PPS OUT IRIG OUT

FREQ OUT 1PPS OUT

SERIAL COMM 1

RS-232

IRIG OUT

SERIAL COMM 2

RS-232

RELAY 1 RELAY 2 RELAY 3

C NC NO C NC NO C NC NO G

TIMER/ALARM RELAYS

SERIAL COMM 1

RS-232

POWER

+12VDC

SERIAL COMM 2

RS-232

RS-485 REMOTE

+ - G

RS-485 REMOTE

+ - G + - G

PORT 1 PORT 2

+ - G

PORT 1 PORT 2

GPS ANTENNA

SERIAL SETUP

INTERFACE

INTERFACE

RELAY 1 RELAY 2

RELAY 3

C NC NO C NC NO C NC NO G

TIMER/ALARM RELAYS

POWER

+12VDC

GPS ANTENNA

CHASSIS

GROUND

CHASSIS

GROUND

Figure 4-2: NetClock Rear Panel Detail

NetClock/GPS Instruction Manual 4-3

Model 9283 Spectracom Corporation

4.2.1 Event and Alarm Relay Outputs

The NetClock features three programmable relay outputs. The relays can be configured as major alarms, minor alarms, or events. They can control bells, whistles, sirens or other devices based on the event/alarm setup. Each event has an assigned start and stop time. An event can be scheduled for daily, monthly, or specific date occurrences.

An example of a daily event schedule is to sound the siren at the fire station at noon every day for five seconds. An example of a dated event is to schedule a test of the emergency evacuation horns on May 9th, 2007 from 10:00 AM to 10:05 AM.

The event timer is configured using the Web UI. Relays are configurable as events or alarm outputs. Refer to the appropriate configuration screens in Section 3 of this manual.

Event and alarm relay contacts are rated at 2.0 Amps, 30 VDC. The relays will be in the deenergized state (refer to Figure 4-3) when power is removed, when a major alarm is present and the relay is configured as a major alarm, or when an event is “on” and the relay is configured as an event output. The relay contacts can be referenced to ground by connecting to Pin G of the

Alarm Outputs connector.

G

GROUND

NC

NO

C

NC

NO

C

NC

NO

C

RELAY THREE

RELAY TWO

RELAY ONE

NOTE: Relays are shown in the de-energized state (event “off”).

Figure 4-3: Event and Alarm Relay Contacts

4-4 NetClock/GPS Instruction Manual

Spectracom Corporation Model 9283

4.3 Leap Second occurrence

4.3.1 Reasons for a Leap Second Correction

A Leap Second is an intercalary, one-second adjustment that keeps broadcast standards for time of day close to mean solar time. Leap seconds are necessary to keep time standards synchronized with civil calendars, the basis of which is astronomical. They are used to keep the earth’s rotation in sync with the UTC time.

If it has been determined by the International Earth Rotation and Reference Systems Service

(IERS) that a Leap Second needs to applied, this time correction occurs only at the end of a

UTC month, and has only ever been inserted at the end of June 30 or December 31. A Leap

Second may be either added or removed, but in the past, the leap seconds have always been added because the earth’s rotation is slowing down.

Historically, Leap seconds have been inserted about every 18 months. However, the Earth's rotation rate is unpredictable in the long term, so it is not possible to predict the need for them more than six months in advance.

The NetClock can be alerted of impending leap seconds by either of the following methods:

1. GPS Receiver – The GPS satellite system transmits information regarding a Leap second adjustment at a specific Time and Date an arbitrary number of months in advance.

2. Modem – (Applicable to only units with Option 03 Modem installed). During a modem dial-out call, the call service indicates that a Leap second adjustment at the end of this current calendar month will occur.

4.3.2 Leap Second Alert Notification

The NetClock will announce a pending Leap Second adjustment by the following methods:

1. Data Formats 2 and 7 on the Serial and Remote Ports contain a Leap Second indicator.

During the entire calendar month preceding a Leap Second adjustment, these Formats indicate that at the end of the current month a Leap Second Adjustment will be made by having a ‘L’ rather than a ‘ ‘ (space) character in the data stream. Note that his does not indicate the direction of the adjustment as adding or removing seconds. These formats always assume that the Leap Second will be added, not removed.

2. NTP Packets contain two Leap Indicator Bits. In the 24 hours preceding a Leap Second

Adjustment, the Leap Indicator Bits (2 bits) which normally are 00b for sync are 01b (1) for Add a Leap Second and 10b (2) for remove a Leap Second. The bit pattern 11b (3) indicates out of sync and in this condition NTP does NOT indicate Leap seconds. The

Sync state indicates leap seconds by indicating sync can be 00b, 01b, or 02b.

NOTE: It is the responsibility of the client software utilizing either the Data Formats or NTP time stamps to correct for a Leap Second occurrence. The NetClock will make the correction at the right time. However, because computers and other systems may not utilize the time every second, the Leap second correction may be delayed until the next scheduled interval, unless the software properly handles the advance notice of a pending Leap Second and applies the correction at the right time.

NetClock/GPS Instruction Manual 4-5

Model 9283 Spectracom Corporation

3. The Dynamic System Information box in the “System Status” page located under the web page of “Status and Logs” will display a Leap Second Status box indicating +1 or -1

Leap second adjustment at the end of the month to users during the entire calendar month preceding the actual adjustment.

4.3.3 Sequence of a Leap Second Correction Being Applied

1. The following is the time output sequence that the Model 9283 will utilize to apply the

Leap second at UTC midnight (Not local time midnight. The Local time at which the adjustment is made will depend on which Time Zone you are located in).

A) Sequence of seconds output when adding a leap second:

56, 57, 58, 59, 60, 0, 1, 2, 3, …

B) Sequence of seconds output when removing Leap seconds:

56, 57, 58, 0, 1, 2, 3, 4, …

2. An entry will be made in the Operational log that the time was adjusted for a Leap

Second.

A) An example log entry for a Positive Leap Second is as follows:

TIME= 23:59:59 DATE= 2005-12-31

System Clock Service

Leap second inserted at end of month.

B) An example log entry for a Negative Leap Second is as follows:

TIME= 23:59:59 DATE= 2005-12-31

System Clock Service

Leap second removed at end of month.

4-6 NetClock/GPS Instruction Manual

Spectracom Corporation Model 9283

5 Serial Data Formats

This section describes each of the Data Format selections available on the RS-232 (Serial

Comm) and RS-485 (Remote Port) outputs. Format selection is made as part of the Serial

Comm and Remote port configuration. Most applications utilize either Data Format 0 or Data

Format 2.

5.1 Format 0

Format 0 includes a time synchronization status character, day of year, time reflecting Time

Zone Offset and DST corrections when enabled. Format 0 also includes the DST/Standard Time indicator, and the Time Zone Offset value. Format 0 data structure is shown below:

CR LF I ^ ^ DDD ^ HH:MM:SS ^ DTZ=XX CR LF where:

LF =

I =

^ =

DDD =

: =

Line Feed

Time Sync Status (space, ?, *) space separator

Day of Year (001 - 366)

Colon separator

SS =

D =

TZ =

XX =

Seconds (00- 60)

Daylight Saving Time indicator (S,I,D,O)

Time Zone

Time Zone offset (00-23)

The leading edge of the first character (CR) marks the on-time point of the data stream.

The time synchronization status character I is defined as described below:

(Space) = Whenever the front panel Time Sync lamp is green.

? = When the receiver is unable to track any satellites and the Time Sync lamp is red.

* = When the receiver time is derived from the battery backed clock or set manual through the Setup Port Interface.

The Daylight Saving Time indicator D is defined as:

S =

I =

D =

During periods of Standard time for the selected DST schedule.

During the 24-hour period preceding the change into DST

During periods of Daylight Saving Time for the selected DST schedule

O = During the 24-hour period preceding the change out of DST

Example: 271 12:45:36 DTZ=08

The example data stream provides the following information:

Sync Status: Time synchronized to GPS

NetClock/GPS Instruction Manual 5-1

Model 9283 Spectracom Corporation

Date:

Time:

5.2

Day 271

12:45:36 Pacific Daylight Time

D = DST, Time Zone 08 = Pacific Time

Format 1

This format provides the fully decoded time data stream. Format 1 converts the received day of year data (001-366) to a date consisting of day of week, month, and day of the month. Format 1 also contains a time synchronization status character, year, and time reflecting time zone offset and DST correction when enabled. Format 1 data structure is shown below:

CR LF I ^ WWW ^ DDMMMYY ^ HH:MM:SS CR LF where:

CR = Carriage Return

LF = Line Feed

I = Time Sync Status (space, ?, *)

^ = space separator

WWW = Day of Week (SUN, MON, TUE, WED, THU, FRI, SAT)

DD = Numerical Day of Month (^1-31)

MMM = Month (JAN, FEB, MAR, APR, MAY, JUN, JUL, AUG, SEP, OCT, NOV, DEC)

YY = Year without century (99, 00, 01 etc.)

HH = Hours (00-23)

: = Colon separator

MM = Minutes (00-59)

SS = Seconds (00 - 60)

The leading edge of the first character (CR) marks the on-time point of the data stream.

The time synchronization status character I is defined as described below:

(Space) = Whenever the front panel time synchronization lamp is green.

? = When the receiver is unable to track any satellites and the time synchronization lamp is red.

* = When the receiver time is derived from the battery backed clock or set manually through the Setup Port Interface.

Example: * FRI 20APR01 12:45:36

The example data stream provides the following information:

Sync Status: The clock is not time synchronized to GPS. Time is derived from the battery backed clock or set manually

Date:

Time:

Friday, April 20, 2001

12:45:36

5-2 NetClock/GPS Instruction Manual

Spectracom Corporation Model 9283

NOTE: Data Format 1 has an available modification that may be made to the data stream structure. Most external systems utilizing Data Format 1 will look for a single digit day of the month for day 1 through day 9, with a space in front of each digit ( ^1, ^2, ^3 …

10,11… ) whereas other systems need to see a two digit day of the month for all days

1 through 9 with a leading 0 instead of a space (01, 02, 03… 10, 11…). If your device requires the two digit day of the month for days 1 through 9, the following procedure will change the Data Format 1 structure to provide this.

Connect to the Serial Setup Interface port with a PC running HyperTerminal OR telnet into the

NetClock using the IP address of the unit.

To change Data Format 1 output on a Serial port to a leading 0, type:

ser mod ser[1/2] 1 zero <enter>

(Where 1 or 2 is the desired Serial port number)

To change Data Format 1 output on a Remote RS-485 port to a leading 0, type:

rem mod rem[1/2] 1 zero <enter>

(Where 1 or 2 is the desired Remote port number).

To change Data Format 1 output on a Serial port back to a leading space, type:

Ser mod ser[1/2] none <enter>

(Where 1 or 2 is the desired Remote port number).

To change Data Format 1 output on a Remote RS-485 back to a leading space, type:

rem mod rem[1/2] none <enter>

(Where 1 or 2 is the desired Remote port number).

5.3 Format 2

This format provides a time data stream with millisecond resolution. The Format 2 data stream consists of indicators for time synchronization status, time quality, leap second and Daylight

Saving Time. Time data reflects UTC time and is in the 24-hour format. Format 2 data structure is shown below:

NOTE: Format 2 cannot be configured for a Time Zone Offset or with automatic Daylight

Saving Time adjustment. Attempting to configure a Local clock using Data Format 2 with either a Time Zone Offset or automatic DST rule will result in an error message.

CR LF IQYY ^ DDD ^ HH:MM:SS.SSS ^ LD where:

CR = Carriage Return

LF = Line Feed

I = Time Sync Status (space, ?, *)

Q = Quality Indicator (space, A, B, C, D)

YY = Year without century (99, 00, 01 etc.)

^ = space separator

NetClock/GPS Instruction Manual 5-3

Model 9283 Spectracom Corporation

DDD = Day of Year (001 - 366)

HH = Hours (00-23 UTC time)

: = Colon separator

MM = Minutes (00-59)

SS = Seconds (00-60)

. = Decimal Separator

SSS = Milliseconds (000-999)

L = Leap Second Indicator (space, L)

D = Daylight Saving Time Indicator (S,I,D,O)

The leading edge of the first character (CR) marks the on-time point of the data stream.

The time synchronization status character I is defined as described below:

(Space) = Whenever the front panel time synchronization lamp is green.

? = When the receiver is unable to track any satellites and the time synchronization lamp is red.

* = When the receiver time is derived from the battery backed clock or set manually through the Setup Port Interface.

The quality indicator Q provides an inaccuracy estimate of the output data stream. When the receiver is unable to track any GPS satellites, a timer is started. Table 6-2: Table of Quality

Indicators lists the quality indicators and the corresponding error estimates based upon the GPS receiver 1 PPS stability, and the time elapsed tracking no satellites. The Tracking Zero Satellites timer and the quality indicator reset when the receiver reacquires a satellite.

Quality Time

(hours) configuration)

(milliseconds)

05)

(milliseconds)

Rubidium Error

(Option 04)

(microseconds)

Space Lock <1 <0.01

<0.72

<0.3

<1.8

<7.2

<36

<18

<90

>36

Table 5-1: Table of Quality Indicators

The leap second indicator L is defined as:

>90

(Space) = When a leap second correction is not scheduled for the end of the month.

L = When a leap second correction is scheduled for the end of the month.

The Daylight Saving Time indicator D is defined as:

S = During periods of Standard time for the selected DST schedule.

I =

D =

O =

During the 24-hour period preceding the change into DST.

During periods of Daylight Saving Time for the selected DST schedule.

During the 24-hour period preceding the change out of DST.

5-4 NetClock/GPS Instruction Manual

Spectracom Corporation Model 9283

Example: ?A01 271 12:45:36.123 S

The example data stream provides the following information:

Sync Status: The clock has lost GPS time sync. The inaccuracy code of “A” indicates the expected time error is <10 milliseconds.

Date: Day 271 of year 2001.

Time: 12:45:36 UTC time, Standard time is in effect.

5.4 Format 3

Format 3 provides a format identifier, time synchronization status character, year, month, day, time with time zone and DST corrections, time difference from UTC, Standard time/DST indicator, leap second indicator and on-time marker. Format 3 data structure is shown below:

FFFFI^YYYYMMDD^HHMMSS±HHMMD L # CR LF where:

FFFF =

I =

^ =

YYYY =

MM =

DD =

HH =

MM =

SS =

± =

HHMM =

Format Identifier (0003)

Time Sync Status (Space, ? *) space separator

Year (1999, 2000, 2001 etc.)

Month Number (01-12)

Day of the Month (01-31)

Hours (00-23)

Minutes (00-59)

Seconds (00-60)

Positive or Negative UTC offset (+,-) Time Difference from UTC

D =

L =

UTC Time Difference Hours, Minutes (00:00-23:00)

Daylight Saving Time Indicator (S,I,D,O)

Leap Second Indicator (space, L)

# =

CR =

LF =

On time point

Carriage Return

Line Feed

The time synchronization status character I is defined as:

(Space) = Whenever the front panel time synchronization lamp is green.

? = When the receiver is unable to track any satellites and the time synchronization lamp is red.

* = When the receiver time is derived from the battery backed clock or set manually through the Setup Port Interface.

The time difference from UTC, ±HHMM, is selected when the Serial Comm or Remote port is configured. A time difference of -0500 represents Eastern Time. UTC is represented by +0000.

The Daylight Saving Time indicator D is defined as:

NetClock/GPS Instruction Manual 5-5

Model 9283 Spectracom Corporation

S = During periods of standard time for the selected DST schedule.

I =

D =

During the 24-hour period preceding the change into DST.

During periods of Daylight Saving Time for the selected DST schedule.

O = During the 24-hour period preceding the change out of DST.

The leap second indicator L is defined as:

(Space) = When a leap second correction is not scheduled at the end of the month.

L = When a leap second correction is scheduled at the months end.

Example: 0003 20010415 124536-0500D #

The example data stream provides the following information:

Data Format: 3

Sync Status:

Date:

Time:

Time Synchronized to GPS.

April 15, 2001.

12:45:36 EDT (Eastern Daylight Time). The time difference is 5 hours

Leap Second: No leap second is scheduled for this month.

5.5 Format 4

Format 4 provides a format indicator, time synchronization status character, modified Julian date, time reflecting UTC with 0.1 millisecond resolution and a leap second indicator. Format 4 data structure is shown below:

FFFFIMJDXX^HHMMSS.SSSS^L CR LF where:

FFFF =

I =

MJDXX =

HH =

MM =

SS.SSSS =

L =

CR =

LF =

Format Identifier (0004)

Time Sync Status (Space, ? *)

Modified Julian Date

Hours (00-23 UTC time)

Minutes (00-59)

Seconds (00.0000-60.0000)

Leap Second Indicator (^, L)

Carriage Return

Line Feed

The start bit of the first character marks the on-time point of the data stream.

The time synchronization status character I is defined as:

(Space) = Whenever the front panel time synchronization lamp is green.

5-6 NetClock/GPS Instruction Manual

Spectracom Corporation Model 9283

? = When the receiver is unable to track any satellites and the time synchronization lamp is red.

* = When the receiver time is derived from the battery backed clock or set manually through the Setup Port Interface.

The leap second indicator L is defined as:

(Space) = When a leap second correction is not scheduled at the end of the month.

L = when a leap second correction is scheduled at the months end.

Example: 0004 50085 124536.1942 L

The example data stream provides the following information:

Data format:

Sync Status:

Modified Julian Date: 50085

4

Time synchronized to GPS.

Leap Second:

5.6 Format 7

A leap second is scheduled at the end of the month.

This format provides a time data stream with millisecond resolution. The Format 7 data stream consists of indicators for time synchronization status, leap second and Daylight Saving Time.

Time data reflects UTC time and is in the 24-hour format. Format 7 data structure is shown below:

NOTE: Format 7 cannot be configured for a Time Zone Offset or with automatic Daylight

Saving Time adjustment. Attempting to configure a Local clock using Data Format 7 with either a Time Zone Offset or automatic DST rule will result in an error message.

CR LF I^YY^DDD^HH:MM:SS.SSSL^D CR LF where:

CR = Carriage Return

LF = Line Feed

I = Time Sync Status (space, ?, *)

YY = Year without century (99, 00, 01 etc.)

^ = space separator

DDD = Day of Year (001 - 366)

HH = Hours (00-23 UTC time)

: = Colon separator

MM = Minutes (00-59)

SS = Seconds (00-60)

. = Decimal Separator

SSS = Milliseconds (000-999)

L = Leap Second Indicator (space, L)

D = Daylight Saving Time Indicator (S,I,D,O)

NetClock/GPS Instruction Manual 5-7

Model 9283 Spectracom Corporation

The leading edge of the first character (CR) marks the on-time point of the data stream.

The time synchronization status character I is defined as described below:

(Space) = Whenever the front panel time synchronization lamp is green.

? = When the receiver is unable to track any satellites and the time synchronization lamp is red.

* = When the receiver time is derived from the battery backed clock or set manually through the Setup Port Interface.

The leap second indicator L is defined as:

(Space) = When a leap second correction is not scheduled for the end of the month.

L = When a leap second correction is scheduled for the end of the month.

The Daylight Saving Time indicator D is defined as:

S = During periods of Standard time for the selected DST schedule.

I =

D =

During the 24-hour period preceding the change into DST.

During periods of Daylight Saving Time for the selected DST schedule.

O = During the 24-hour period preceding the change out of DST.

Example: ? 01 271 12:45:36.123 S

The example data stream provides the following information:

Sync Status: The clock has lost GPS time sync.

Date: Day 271 of year 2001.

Time: 12:45:36 UTC time, Standard time is in effect.

5.7 Format 8

Format 8 includes a time synchronization status character, the four digit year, day of year, time reflecting Time Zone Offset and DST corrections when enabled. Format 8 also includes the

DST/Standard Time indicator, and the Time Zone Offset value. Format 8 data structure is shown below:

CR LF I ^ ^YYYY^ DDD ^ HH:MM:SS ^ D+XX CR LF or

CR LF I ^ ^YYYY^ DDD ^ HH:MM:SS ^ D-XX CR LF where

CR = Carriage Return

LF = Line Feed

I = Time Sync Status (space, ?, *)

YYYY = Four digit year indication

^ = space separator

DDD = Day of Year (001 - 366)

HH = Hours (00-23)

: = Colon separator

5-8 NetClock/GPS Instruction Manual

Spectracom Corporation Model 9283

MM = Minutes (00-59)

SS = Seconds (00 - 60)

D = Daylight Saving Time indicator (S,I,D,0)

XX = Time Zone Switch Setting (+/- 00 to 12)

The leading edge of the first character (CR) marks the on-time point of the data stream.

Time sync status character I is described below:

I = (space) when the NetClock is synchronized to UTC

source.

= * when the NetClock time is set manually.

= ? when the NetClock has not achieved or has lost

synchronization to UTC source.

The time and date can be set to either local time or UTC time, depending upon the configuration of the output port.

5.8 Format 90

Format 90 provides a position data stream in NMEA 0183 GPGGA GPS Fix data format.

The Format 90 data structure is shown below:

$GPGGA,HHMMSS.SS,ddmm.mmmm,n,dddmm.mmmm,e,Q,SS,YY.y,+AAAAA.a,M,,,,*CC CR

LF where:

$GP = GPS

GGA =

HHMMSS.SS =

GPS Fix Data Message

System Talker

Latest time of Position Fix, UTC. This field is blank until a 3D fix is

ddmm.mmmm,n =

dd = mm.mmmm =

n =

dddmm.mmmm,e =

ddd = mm.mmmm =

e =

Q =

0 =

1 =

SS =

YY.Y = acquired

Latitude degress, 00...90 minutes, 00.0000....59.9999 direction, N = North, S = South

Longitude degress, 000...180 minutes, 00.0000....59.9999 direction, E = East, W = West

Quality Indicator,

No 3D fix

3D fix

Number of satellites tracked, 0...8

Dilution of precision, 00.0...99.9

+AAAAA.a,M =

,,,, =

Antenna height in meters, referenced to mean sea level

Fields for geoidal separation and differential GPS not supported

cc = Check sum message, HEX 00...7F

Check sum calculated by Xoring all bytes between $ and *.

CR =

LF =

Carriage Return

Line Feed

NetClock/GPS Instruction Manual 5-9

Model 9283 Spectracom Corporation

Example:

$GPGAA,151119.00,4307.0241,N,07729.2249,W,1,06,03.2,+00125.5,M,,,,*3F

The example data stream provides the following information:

Time of Position Fix: 15:11:19.00 UTC

Satellites Used:

Dilution of Precision:

Antenna Height:

Check Sum:

6

3.2

+125.5 meters above sea level

3

5-10 NetClock/GPS Instruction Manual

Spectracom Corporation Model 9283

6 Serial Setup Interface Commands

The NetClock can be configured using the serial setup interface port and a terminal emulation program as discussed in Section 3.2. At the Command Line Interface (CLI), the user can manage files and configure product settings.

The available CLI commands are as follows: time - time reboot - reboot [app] log - log COMMAND OBJECT [ HANDLE ] option - option COMMAND [OPTION | PRODUCT] [VALUE] ltc - ltc COMMAND [INDEX | NAME] [...] net - net COMMAND [Arguments] sys - sys COMMAND [Arguments] mdo - mdo COMMAND [Arguments] ser - ser COMMAND SERIAL [Arguments] rem - rem COMMAND REMOTE [Arguments] irig - irig COMMAND ARG frq - frq COMMAND INDEX [Arguments]

One additional command, help, displays the available commands at the CLI. Typing help and a specific command (for example, help time, or help option) and then pressing the enter key displays detailed information about the command.

NOTE: Commands typed at the CLI are case-sensitive. All terms and commands entered must be lower-case.

6.1 time

help time

Use the 'time' command to read the current system date and time.

USAGE: time

6.2 reboot

The reboot is used to warm-boot the unit without having to disconnect or reconnect the power supply. The reboot command is intended only for administrators, and is available at the admin security level.

NOTE: This command provides a convenient way to remotely update application software in that the unit will automatically execute the most recent image in /sys/bin/. help reboot

This command is used to immediately reboot a unit.

The 'app' option is used to restart the application. Normally the unit reboots to the application, unless the optional parameter is specified to 'bootloader' which it will reboot to the bootloader.

USAGE: reboot [app]

app - Reboot to application.

NetClock/GPS Instruction Manual 6-1

Model 9283 Spectracom Corporation

NOTE: Do not reboot the unit while file uploads are in progress. Do not reboot the unit with non-application images are located in /sys/bin/. If either of these conditions is not fulfilled, the unit may fail to boot the application image, which could result in a unit that function incorrectly or not at all.

6.3 log

help log

Use the 'log' command to access and manage the log system.

USAGE: log COMMAND OBJECT [ HANDLE ]

COMMAND

show - Shows the contents of a log.

get - Gets the record #[HANDLE] from a log.

OBJECT

j - Journal log

a - Alarm log

g - GPS qualification Log

o - Operational log

x - Oscillator log

d - Dialout log

n - NTP log

r - Event relay log

t - Authorization log

u - Update log

HANDLE : Record number to access. The first record is 0.

6.4 option

help option

The 'option' commands provide a means to set, clear and display product configuration options.

USAGE: option COMMAND [OPTION | PRODUCT] [VALUE]

COMMAND

display - Displays current option settings.

enable - Enables options after verifying the hash value.

6-2 NetClock/GPS Instruction Manual

Spectracom Corporation Model 9283

6.5 ltc

The ltc command is used to create up to five Local clocks. Local clocks allow many of the output ports to be able to provide time data as local time instead of just UTC time. This command requires admin level login. help ltc

The 'ltc' group of commands are used to manage the local time clocks.

USAGE: ltc COMMAND [INDEX | NAME] [...]

COMMAND = {disp | create | delete | tz | dst}

disp - Displays information about the local clock.

create - Creates a new local clock. Multiple consecutive spaces in the name will be reduced to a single space

delete - Deletes a local clock at the specified index.

tz - Assigns a new time zone offset for the local clock.

dst - Assigns a new daylight saving rule to the clock.

6.6 net

The command, net, is used to configure the network interface. The net command consists of a set of subcommands that are used to get, set or change each individual network setting. Some of the network settings require admin level security in order to set or change them. help net

The 'net' group of commands are used to manage network interface

USAGE: net COMMAND [Arguments]

COMMAND

config - Configure IP settings.

show - Displays network configurations.

daytime - Enable/disable Daytime.

time - Enable/disable UNIX time.

telnet - Enable/disable Telnet.

ftp - Enable/disable FTP

http - Enable/disable HTTP.

https - Enable/disable secure HTTP.

ssh - Enable/disable SSH.

6.7 sys

help sys

The sys group of commands are used to retrieve information about the system.

USAGE: sys COMMAND [Arguments]

COMMAND

mem - Display memory information. Use v for verbose mode.

NetClock/GPS Instruction Manual 6-3

Model 9283 Spectracom Corporation

6.8 mdo

The mdo command is used to configure the dial-out modem option if it is installed. The mdo command consists of a set of subcommands used to control logs and modem configuration. help mdo

The mdo group of commands are used to setup the modem.

USAGE: mdo COMMAND [Arguments]

COMMAND

mode - Sets the Serial Setup Interface into a 'console' or

'modem'

Baud rate can be specified in modem mode.

dialnow - Dials out immediately.

baud - Sets baud rate specified by user.

ITU-R protocols use 1200 and ACTS protocols use 9600. NIST ACTS may support either, however 9600 is recommended.

speaker - Sets modem speaker on/off.

6.9 ser

The ser command allows the rear panel Serial ports to be configured from the console. They require admin level login. help ser

The ser group of commands are used to setup serial ports RS-232.

USAGE: ser COMMAND SERIAL [Arguments]

COMMAND

disp - Displays the current serial port settings.

all - Configures all settings of a serial port.

fmt - Configures the format of the serial port output.

req - Sets the request character on a serial port.

ltc - Sets the reference clock on the serial output.

To add/configure local clocks, use command 'ltc'

baud - Configures the baud rate of a serial port.

6.10 rem

The rem command allows the rear panel Remote output(s) to be configured from the console port. This command requires admin level login to modify. help rem

The rem group of commands are used to setup remote serial ports RS485.

USAGE: rem COMMAND REMOTE [Arguments]

COMMAND

disp - Displays the current remote serial port settings.

all - Configures all settings of a remote serial port.

fmt - Configures the format of the serial port output

ltc - Sets the reference clock on the remote serial

output.

To add/configure local clocks, use command 'ltc'

baud - Configures the baud rate of a remote serial port.

6-4 NetClock/GPS Instruction Manual

Spectracom Corporation Model 9283

6.11 irig

help irig

The 'irig' group of commands are used to control the irig subsystem.

USAGE: irig COMMAND ARG

COMMAND = {disp | b | brb | e | amp | ltc | sig}

disp - Display the current IRIG port settings.

b - Sets the irig output to format B.

brb - Sets the irig output to format B Rubidium.(TTL level)

This option is only available on Rubidium units.

e - Sets the irig output to format E.

amp - Sets the amplitude level for AM signals.

ltc - Sets the reference clock for the IRIG output.

sig - Sets the signature control of the IRIG port.

6.12 frq

help frq

The frq group of commands are used manage frequency interfaces.

USAGE: frq COMMAND INDEX [Arguments]

COMMAND

mode - Sets the signature control mode.

status - Displays the status of the selected frequency

output.

NetClock/GPS Instruction Manual 6-5

Model 9283 Spectracom Corporation

6-6 NetClock/GPS Instruction Manual

Spectracom Corporation Model 9283

7 Options

Spectracom offers several options for the 9200 Series.

Option Description 9283

02

Front panel display & Second Serial

Port/Remote Port

03 Dial-Out Modem & ACTS Server

04 Rb (Rubidium) Oscillator *

05 OCXO Oscillator *

06 IRIG Input

08 SPS GPS Receiver

09 TCXO Oscillator *

*Choose one oscillator only.

STANDARD

OPTIONAL

OPTIONAL

OPTIONAL

OPTIONAL

STANDARD

STANDARD

Please contact Spectracom’s Sales department for information regarding any options you do not yet have that you may wish to purchase. Those options requiring additional explanation are detailed herein.

7.1 Option 03: Modem

7.1.1 Option 03 Basics

Option 03 provides the NetClock with the capability to use a modem to dial-out via an analog phone line for time retrieval if GPS reception is either lost or cannot be obtained due to site limitations. The modem can be configured in the software as either the primary external time reference or it can also be configured as a Secondary/Backup reference in case the primary reference is lost.

The modem interfaces to the NetClock via the Serial Setup Interface located on the rear of the

NetClock. This dual-function port provides the capability to initially configure the network settings and is also the interface for the modem.

If not initially purchased with the unit, Option 03 can be enabled (turned on) in the field. Please contact our Sales department to purchase this option. You will be sent a Hash key that can be entered in the NetClock to enable the security algorithms. The purchase of the option includes a Spectracom supplied compatible modem.

NOTE: The modem MUST be Hayes AT compatible and configured for this mode of operation to operate correctly with the unit. The Spectracom supplied modem is Hayes AT compatible.

NOTE: If the NetClock’s admin or user passwords are changed, the NetClock must be rebooted after this change to ensure proper modem operation.

NetClock/GPS Instruction Manual 7-1

Model 9283 Spectracom Corporation

The cable needed to connect the modem to the NetClock is a DB9 male to DB9 male null modem serial cable. This should come with the modem package.

1. Connect one DB9 side of the null modem cable to the modem and the other DB9 side to the Serial Setup port located on the rear of the NetClock.

2. Connect the CAT2 telephone cable from the analog phone line to the modem.

3. Connect the modem power adapter to a power outlet.

The modem is configured from the System Modem Configuration screen, which includes the

Port Mode pull-down menu. The modem is connected to the Serial Setup port for normal operation. The pull-down menu allows the operator to select the mode in which the serial setup port will operate. Two options are available: Console mode and Client mode. The screen and the menu available at the left of the screen vary depending on the mode.

Console Mode: In this mode (Figure 7-1), Serial Setup port can be connected with a serial cable to a computer with a serial terminal program running. The serial setup software commands can then be used to interface with the unit. The modem operation will not be available while selected to this mode.

Client Mode: In this mode (Figure 7-2), the Serial Setup port can be connected to a modem for dialing out. The Serial Setup port will be unavailable for network configuration while in this mode.

NOTE: If the NetClock is switched repeatedly between Console and Client modes, the modem application may stop functioning. Reboot the NetClock to clear this condition.

ACTS Server Mode: This mode (Figure 7-3) configures the NetClock to answer telephone calls, using the modem, when connected to an analog telephone line. The modem connects to the NetClock in the same manner as for Client mode.

NOTE: Click “Submit” to apply the change to the modem mode. Return to Modem

Configuration to access the screen options for Client mode.

7-2 NetClock/GPS Instruction Manual

Spectracom Corporation Model 9283

Figure 7-1: System Modem Configuration Screen, Console Mode

NetClock/GPS Instruction Manual 7-3

Model 9283 Spectracom Corporation

Figure 7-2: System Modem Configuration Screen, Client Mode

After selecting Client mode, submitting the change, and returning to the Modem Configuration screen, the user may configure the modem through the Web UI:

Primary/Secondary Time Source: The modem can be configured as either the primary reference or a secondary/back-up reference. In the Secondary/Back-up mode of operation, all

GPS antenna problem alarms (indicating a short or open in the antenna cable) and SNMP traps associated with the GPS reference input will be fully enabled. By contrast, when Primary Time

Source is selected, the antenna problem alarm and associated SNMP traps for the antenna will not be generated. No indication of a problem with the GPS cable will be present or available.

The Client mode of operation does not affect the ability to receive GPS.

NOTE: If a unit initially operates without a GPS reference and primary mode of operation is selected, and a GPS antenna is later connected, the mode of operation should be changed to Secondary Time Source. This enables the GPS antenna problem alarms, which can be used in troubleshooting the system.

7-4 NetClock/GPS Instruction Manual

Spectracom Corporation Model 9283

Baud rate: Baud rates of 1200 and 9600 are available and can be selected from the pull-down menu.

Modem speaker: Toggles the modem speaker on or off during dial out.

Dialout now: (Only available in Client mode and only when the unit is not in time sync).

Checking this box and clicking submit will prompt the dial out modem software to attempt an immediate dial out procedure with the current settings if the unit is currently out of sync. When a unit is configured in client mode while it is in time sync, the “Dialout now” checkbox will be greyed-out (disabled).

The ACTS Server feature has been designed to operate similarly to the Automated Computer

Time Service (ACTS) provided by the National Institute of Standards and Technology (NIST). It is compatible with client programs that dial out to the NIST ACTS service for time synchronization, such as the NetClock when configured in Client mode. For best accuracy,

Spectracom recommends using a NetClock in Client mode in conjunction with a NetClock operating in ACTS Server mode.

Figure 7-3: ACTS Server Mode Selected

NetClock/GPS Instruction Manual 7-5

Model 9283 Spectracom Corporation

Time Service Abbreviation: This field indicates the source from which a dial-out client is receiving Universal Coordinated Time (UTC). It is inserted in the ACTS timing message sent to the modem client. A time service abbreviation of SPEC will appear in the timing message as

UTC (SPEC).

DUT1 Value: This is a correction factor for converting UTC to an older form of Universal Time.

The value should always be a number between -.8 and .8 seconds. Adding DUT1 to UTC produces UT1 (a specific measure of time related to the rotation of Earth). The three-digit string entered in this field appears in the time messages sent to the modem client.

Leap Second: This field allows the user to specify the addition or removal of a leap second as well as the month and year in which this addition or removal will occur. The ACTS Server uses this information to notify the modem client of a pending leap second. It does so through time messages sent to the modem client.

Daylight Saving Time: This field is used to specify the month and day of the current year in which Daylight Saving Time (DST) is entered and exited. This information is included in the time messages sent to the modem client.

Modem Configuration File: The ACTS Server uses built-in, Hayes-compatible commands to configure the modem. Some modems may support additional or different commands, which may be required for proper configuration. If a modem configuration file is specified, the ACTS

Server will use the commands in that specified file to configure the modem, rather than using its built-in Hayes-compatible commands.

Modem Speaker: Clicking the appropriate radio button toggles the modem speaker on or off during dial out.

The ACTS Server Greeting (Figure 7-4), accessible using the left-hand menu, is a message sent to a modem client when a connection is made. The Acts Server Greeting screen allows the user to customize the greeting message for the specific application.

7-6 NetClock/GPS Instruction Manual

Spectracom Corporation Model 9283

Figure 7-4: ACTS Server Greeting

The ACTS Server Statistics screen (Figure 7-5), accessible using the left-hand menu, provides all data for the current day and the previous day. For each day, it shows the number of attempted and completed calls during each hour of that day. This data is helpful in analyzing modem usage and balancing modem client call times.

NetClock/GPS Instruction Manual 7-7

Model 9283 Spectracom Corporation

Figure 7-5: ACTS Server Statistics

The ACTS Server Log (Figure 7-6) helps the user monitor the behavior of the ACTS server daemon, including when it is started, when it is stopped, and how it is configured. The log records information about each time message it sends to the modem client. Data contained in the log is helpful in troubleshooting when there is a problem in communication between the

ACTS server and modem client.

7-8 NetClock/GPS Instruction Manual

Spectracom Corporation Model 9283

7.1.5 Modem Dial-Out Setup

Figure 7-6: ACTS Server Log

The modem dial-out feature is used as either a Secondary/Backup time reference when all other external time references become unavailable or can also be used as a primary reference if an external reference is not available for use (Such as the inability to receive GPS at a particular

NetClock/GPS Instruction Manual 7-9

Model 9283 Spectracom Corporation location). The System Modem Configuration screen (Figure 7-1) provides options to configure the operation of the dial-out modem feature from the left-hand menu. All fields will display the current system settings.

The Modem Dialout screen (Figure 7-7) is used to annotate the phone number used to obtain the time from and to determine how often the modem will be used to retrieve the current time.

Phone Numbers:

Prefix: The phone prefix is a number(s) that need to be dialed to reach an outside line.

Predefined: Stores two predefined number NIST-Colorado and NIST-Hawaii. These are the phone numbers to the National Institute of Standards and Technology modem time service.

Specified Number: This field will take any phone number that the user would like to use to dial out to obtain time.

Try Calling: This field specifies how many times the dial out modem software will try to connect to the selected phone number. Setting this field’s value to 0 will generate a warning because it will prevent any dial out to be made in any condition, effectively disabling the modem dial out feature.

Call Interval:

The call interval is used to manually configure how often the modem should dial-out for Time verification calls when the unit is in the holdover mode and time synchronization is normally derived from GPS (Secondary/Backup mode of operation) or time synchronization calls when the modem is selected as the primary mode of operation.

To prevent a leap second occurrence from being missed and a one second error being inserted into the NetClock, we recommend the Time Verification calls be placed less than once-permonth. Setting the Time Verification call period to longer than once-per-month can result in a one second error from the time a leap second is asserted by NIST until the next time verification/time synchronization call is placed.

7-10 NetClock/GPS Instruction Manual

Spectracom Corporation Model 9283

Figure 7-7: System Modem Dial Out Screen (1 of 2)

To help prevent a loss of time synchronization condition from occurring, the call interval should be configured for a value of less than the holdover period. This will prevent the holdover period from expiring (which will cause loss of Time Sync) because the modem was configured to dialout after the holdover expired. For example, if the holdover period is set for two weeks, the call interval should be set to dial-out less than every two weeks. Otherwise, holdover will expire before the modem is scheduled for a dial-out and time synchronization will be lost.

Boot:

This field specifies how long the modem software will wait after being powered up to check the unit’s time synchronization status. If this time expires and the unit has not achieved time synchronization yet, the modem software will automatically dial out with the current settings at that time. Note that changes to this timer’s settings will not change the timeout of the current countdown if it has already begun (e.g. If the timer is set to 1 hour and then rebooted, the unit will countdown to 1 hour at power up. Changing the timer’s settings to 30 minutes will not affect the current countdown. The new 30 minutes value will only be used if another power cycle occurred). To skip the initial countdown, use the Dialout Now feature on the Modem

Configuration screen.

NetClock/GPS Instruction Manual 7-11

Model 9283

.

Spectracom Corporation

Figure 7-8: System Modem Dial Out Screen (2 of 2)

If the modem is the primary mode of operation for time synchronization, the boot dial-out value should be set for a very short duration as the unit will not be able to achieve time synchronization without the modem placing a call. If the modem is strictly a backup to the external reference, this period can be lengthened to longer than the typical amount of time needed to synchronize to the external reference.

The System Modem Calibrate screen (Figure 7-9) is used to calibrate the modem for increased accuracy of the dial-out calls. The calibration procedure is not required but may be used to provide greater accuracy of future modem calls. The calibration process, using several dial-out helps compensate for inherit internal software processing lags as well as phone network delays as well. Different locations may experience different latencies as well as time of day latencies may also vary.

7-12 NetClock/GPS Instruction Manual

Spectracom Corporation Model 9283

Figure 7-9: System Modem Calibrate Screen

The calibrate mode allows the user to define the typical latency for the geographic location as well as the time of day the modem is most likely to be used for time synchronization (such as for primary mode of operation).

Calibrate Status:

The status of calibration is displayed at the top of the screen. If the calibration has been made then the unit will say “calibrated”. If the latency has not been set or has been manually set, then the unit will say “not calibrated”. If the unit is currently calibrating then the number of successful calls will be displayed here.

NetClock/GPS Instruction Manual 7-13

Model 9283 Spectracom Corporation

Calibrate Settings

Calibrate Now:

Calibrate now is based on the current settings. This will calculate the call latency and adjust all future calls based on this value. The call latency is based primarily on the phone system.

Therefore, this should be done when the unit is first set up and does not need to be done again unless it is connected to a different phone system.

Reset Latency Value:

This resets the latency value to the factory default. This can be done if the unit was accidentally set.

Latency Value/Manually Set Latency:

This box displays the current latency value. If the “manually set latency” box is checked then this can be edited to set the current latency.

Number of Calibration calls:

This is the number of calibration calls to be made before the modem is declared as calibrated.

The accuracy of the latency calculation depends directly on this number. The more calls that are made, the more accurate the calculation will be. This should not be lowered from the default, but it may be safely raised.

Calibration Call Interval:

This is the interval between calibration calls. This value, along with the number of calibration calls, will determine how long the calibration process will take.

The modem can be tested using the Web UI through the Modem Test screen (Figure 7-10).

Test Now:

Tests the modem to make sure it can correctly dial-out. This may only be done while in time synchronization from another source such as GPS. To test in other states, use the dial now button. The result of this test will be written to the log file.

Test On Interval:

Enables the modem test interval. If the unit has not made another type of call during this interval then a test call will be made.

Test Interval:

Sets the modem test interval. In order to set these values, the “Test On Interval” box must be checked. If the interval expires before another type of call is made then a modem test call will be made. To schedule a call when not in sync from another time source, use the “Call Interval” setting in the Dialout Settings page.

7-14 NetClock/GPS Instruction Manual

Spectracom Corporation Model 9283

Figure 7-10: Modem Test Screen

There are four different types of modem dial-out calls that can be made. The call type is determined by the state of the system (after the call is finished) as well as user input.

Calibration calls happen upon a user request. Time verification calls happen on a user specified interval if holdover is entered from time synchronization with another source. Time synchronization calls occur when time synchronization is lost and on a user specified interval until another time source is available. Modem test calls happen when no calls have been made for a user specified time, or upon a user request. Because the modem determines how to use a

NetClock/GPS Instruction Manual 7-15

Model 9283 Spectracom Corporation call after the call is finished it is possible to start a call as a certain call type and actually use it as another call type. Here is a description of each of the four possible call types.

Calibration calls are done to characterize the call latency. A user specified number of calls will be made over the calibration period and the average latency will be used to adjust all future calls. The calibration will only be done at the user’s request and may be started only while in sync from another time source. Calibration calls may be continued into holdover, but will be cut off if the unit goes out of sync at any point during the calibration period.

7.1.7.2 Time Verification Call

Time verification calls are made to verify the unit still has acceptable time and to correct for any leap seconds that may be asserted while the reference is not available. Calls will be made on a user specified time table. If the call interval is more than a month leap seconds may be missed.

If a leap second is to be inserted at the end of the month then the clock will be scheduled to do so. If the time is off by more than half a second then the unit will be immediately put into unsynchronized mode (time synchronization lamp will extinguish and time outputs will be ignored).

7.1.7.3 Time Sync Call

Time synchronization calls occur to set the second and sub second timers and to check for any leap seconds. If a call is successful the timer will be set and the unit will be put in holdover mode with the holdover timer reset. In addition if a leap second is to be inserted at the end of the month then the clock will be scheduled to do so. Time synchronization calls will be made once the unit has gone into unsynchronized mode until it obtains sync from another time source.

During this period, calls will be made on a user specified timetable or any time the unit goes out of sync.

7.1.7.4 Modem Test Call

Test calls are calls that make sure the modem is working. The modem will call out and check for valid time messages. The unit will log “test passed” if it was able to get good time messages or failed if it was not. No changes will be made to the system time. Testing can be done only in sync from another time source and can either be on a specified interval or as requested.

For the modem to function with the NetClock, the client mode must be selected in the System

Modem Configuration screen for the NetClock to accept the change from console mode.

If the unit is already powered-up and not synchronized, choosing dial-out now and hitting submit will cause the unit to connect to NIST. If the unit is already synchronized, this option is not available (The dialout now function is not available for operation if the NetClock is in either holdover or sync mode). To operate the modem if it is in currently in sync, disconnect the antenna and wait until the variable holdover period expires or power cycle the unit to clear the sync condition. Then, the dial-out now function will be available.

Once the NetClock has dialed and synchronized to NIST, the unit will be in holdover mode until the variable holdover period expires (Devices syncing to the NetClock will still sync) indicated by the sync light flashing green. After the variable holdover expires, the unit will declare loss of

7-16 NetClock/GPS Instruction Manual

Spectracom Corporation Model 9283 sync (Sync lamp turns red) or when the scheduled Time Verification call occurs, the modem automatically dials NIST again. If connection is made, holdover is restored (Sync lamp flashes green again).

Verify proper operation of the modem by observing the status of the front panel sync lamp flashing green after connection to NIST and verifying the Model dial-out logs. The Modem

Dialout Log (Figure 7-11) is a running list of the NetClock’s modem activity. This log will have no activity if the NetClock is not equipped with a modem or if the modem has not yet been used.

Figure 7-11: Modem Dialout Log Screen

The Modem Dialout Log provides information concerning the numbers dialed, whether the dialouts were successful, and what changes have been applied to the subsecond counter and

NetClock/GPS Instruction Manual 7-17

Model 9283 Spectracom Corporation system clock. If calling a Spectracom ACTS server, additional information about each time message is logged, including the on-time character (what it is, when it is received) and the advance time included in the message.

If the sync lamp is also flashing red, this is because the GPS antenna is disconnected from the

NetClock. This is not directly related to the modem dial-out feature but if the antenna has been connected in the past, it is related to the reason why the modem is now dialing-out unexpectedly

(Antenna problem causing loss of GPS time Sync).

7-18 NetClock/GPS Instruction Manual

Spectracom Corporation Model 9283

7.2 Option 04: Rubidium Oscillator

Option 04 provides the NetClock with a self-calibrating ovenized rubidium oscillator. The purpose of this oscillator is to provide a very accurate time base when GPS is either lost or cannot be obtained due to site limitations. It is also used to provide a very stabile and accurate

10 MHz output with a high degree of holdover if GPS is lost. Because of its high degree of stability, this oscillator provides the ability to greatly extend the hold-over period when GPS is not present. Extending the hold-over period allows the unit to provide very accurate and useable time stamps and a 10 MHz output for a longer period of time once time synchronization has been lost.

NOTE: The NetClock must be ordered with Option 04 installed at the time of the initial purchase. This option cannot be added after the NetClock has been shipped from the factory.

The Rubidium oscillator is atomic in nature but requires no MSDS.

7.2.1 Comparison of the Rubidium oscillator to the OCXO and standard TCXO oscillators:

10 MHZ frequency output:

Rubidium oscillator (Option 04): 1x10 -12

typical 24-hour average locked to GPS,

1x10

-11

per month typical aging unlocked.

OCXO oscillator (Option 05): 1x10

2x10

-11

-9

typical 24-hour average locked to GPS,

per week typical aging unlocked.

TCXO oscillator (Standard): 1x10

-10

typical 24-hour average locked to GPS

Time drift while the NetClock is in Holdover mode (Loss of primary/backup reference):

Oscillator Option

Rb Option 04

Estimated Error Rates

0.18 microseconds / hour (nominal)

Time to reach 2 ms

463 days

OCXO

TCXO

TCXO

Option 05

Standard

Standard

72 microseconds / hour (nominal)

1.0 milliseconds / hour (nominal)

7.2 milliseconds / hour (worst case)

28 hours

2 hours (typical)

17 minutes*

NetClock/GPS Instruction Manual 7-19

Model 9283 Spectracom Corporation

7.3 Option 05: OCXO Oscillator

Option 05 provides the NetClock with a self-calibrating ovenized quartz oscillator. The purpose of this oscillator is to provide a very accurate time base when GPS is either lost or cannot be obtained due to site limitations and a very precise 10 MHz output. Because of its high degree of stability, this oscillator provides the ability to greatly extend the hold-over period when GPS is not present. Extending the hold-over period allows the unit to provide very accurate and useable time stamps and a 10 MHz output for a longer period of time once time synchronization has been lost.

The OCXO characteristics are not quite the same as the Option 04 Rubidium oscillator, but are still much greater than the standard TCXO that is used in the product when option 4 and 5 are not installed.

NOTE: The NetClock must be ordered with Option 05 installed at the time of the initial purchase. This option cannot be added after the NetClock has been shipped from the factory

7.3.1 Comparison of the OCXO to the Rubidium and Standard TCXO oscillators:

10 MHZ frequency output:

OCXO oscillator (Option 05): 1x10

2x10

-11

-9

typical 24-hour average locked to GPS,

per week typical aging unlocked.

Rubidium oscillator (Option 04): 1x10

1x10

-12

-11

typical 24-hour average locked to GPS,

per month typical aging unlocked.

TCXO oscillator (Standard): 1x10

-10

typical 24-hour average locked to GPS.

Time Drift while the NetClock is in Holdover mode (Loss of primary/backup reference):

Oscillator Option

OCXO

Estimated Error Rates Time to reach 2 ms

Option 05 72 microseconds / hour (nominal) 28 hours

Rubidium Option 04 0.18 microseconds / hour (nominal) 463 days

TCXO Standard 1.0 milliseconds / hour (nominal) 2 hours (typical)

TCXO Standard 7.2 milliseconds / hour (worst case) 17 minutes*

7-20 NetClock/GPS Instruction Manual

Spectracom Corporation

7.4 Option 06: IRIG Input & 1PPS Input

Spectracom NetClock units equipped with Option 06 support IRIG and 1PPS inputs.

Model 9283

Signal:

AM Carrier:

AM Signal Level:

DCLS Signal Level:

IRIG B, amplitude modulated sine wave (AM) or pulse-width-coded (DCLS, Differential).

IRIG B 1000 Hz.

500mV to 10V p-p (Modulated 2:1 to 6:1).

>10k ohms. RS-485 or TTL with DCLS IRIG IN connected to ground.

BNC Connector Pin-out

Center Pin IRIG HI

DB9 Connector Pin-out

Pin 1

Pin 2

Pin 3

Pin 4

Pin 5

Pin 6

Pin 7

Pin 8

Pin 9

NC

Ground

Ground

DCLS IRIG IN + (for single ended)

DCLS IRIG IN -

NC

NC

NC

NC

Signal Level: TTL compatible (High trigger is 2.1 V, low is 0.9 V),

High Z (> 10k ohms), Active rising edge.

From the IRIG Input setup screen (Figure 7-12), the user may configure the source year to be used with the IRIG input time code. By default, the year fields in the IRIG message are ignored and a user-defined value is used.

NetClock/GPS Instruction Manual 7-21

Model 9283 Spectracom Corporation

NOTE: Make sure the year is set correctly when the NetClock is installed. If the year is not set correctly before NTP achieves time synchronization, it will use the value entered. The unit will also default to the year entered if it is powered down during the rollover of the year. If the NetClock was not switched on during the rollover, this value must be updated.

NOTE: When the IRIG Input year is updated, the NTP server must be restarted from the NTP

Web UI page (or the NetClock rebooted) for the new year value to take effect.

Figure 7-12: IRIG Input Screen

The IRIG/ACTS Server Capable NetClock supports an externally provided 1PPS signal, which is supplied as a reference for improved accuracy during holdover. The NetClock auto-detects this signal on the 1PPS Input connector (when provided) and uses it to maintain time only when the primary time reference (such as IRIG input) has become unstable or is no longer available.

The 1PPS signal is also used between modem dial-out adjustments.

7-22 NetClock/GPS Instruction Manual

Spectracom Corporation Model 9283

When a stable 1PPS signal is connected to the NetClock, it is recommended that the holdover timeout on the holdover setup page is adjusted to a value suitable to the desired accuracy for

1PPS source.

Oscillator Recommended Holdover Timeout

TCXO (~2 ppm)

OCXO (~.02 ppm)

2 hours

24 hours

NOTE: Any externally provided 1pps signal should have a MINIMUM accuracy of 10ppm.

When the NetClock receives an externally-provided 1PPS input, this is indicated on the System

Status page in Time Source field (Figure 7-13). Such an indication (“Ext 1PPS”) means that the

NetClock has received time information from the specified time source, but is currently maintaining time using the 1PPS input signal.

Figure 7-13: System Status Screen (1PPS Input Indicated)

NetClock/GPS Instruction Manual 7-23

Model 9283 Spectracom Corporation

7-24 NetClock/GPS Instruction Manual

Spectracom Corporation

8 License Notices

This file is automatically generated from html/copyright.htm

Copyright Notice

[sheepb.jpg] "Clone me," says Dolly sheepishly

_________________________________________________________________

The following copyright notice applies to all files collectively

called the Network Time Protocol Version 4 Distribution. Unless

specifically declared otherwise in an individual file, this notice

applies as if the text was explicitly included in the file.

***********************************************************************

* *

* Copyright (c) David L. Mills 1992-2001 *

* *

* Permission to use, copy, modify, and distribute this software and *

* its documentation for any purpose and without fee is hereby *

* granted, provided that the above copyright notice appears in all *

* copies and that both the copyright notice and this permission *

* notice appear in supporting documentation, and that the name *

* University of Delaware not be used in advertising or publicity *

* pertaining to distribution of the software without specific, *

* written prior permission. The University of Delaware makes no *

* representations about the suitability this software for any *

* purpose. It is provided "as is" without express or implied *

* warranty. *

* *

***********************************************************************

The following individuals contributed in part to the Network Time

Protocol Distribution Version 4 and are acknowledged as authors of

this work.

1. [1]Mark Andrews <[email protected]> Leitch atomic clock

controller

2. [2]Bernd Altmeier <[email protected]> hopf Elektronik serial

line and PCI-bus devices

3. [3]Viraj Bais <[email protected]> and [4]Clayton Kirkwood

<[email protected]> port to WindowsNT 3.5

4. [5]Michael Barone <michael,[email protected]> GPSVME fixes

5. [6]Karl Berry <[email protected]> syslog to file option

6. [7]Greg Brackley <[email protected]> Major rework of

WINNT

port. Clean up recvbuf and iosignal code into separate modules.

7. [8]Marc Brett <[email protected]> Magnavox GPS clock driver

8. [9]Piete Brooks <[email protected]> MSF clock driver,

Trimble PARSE support

9. [10]Reg Clemens <[email protected]> Oncore driver (Current maintainer)

10. [11]Steve Clift <[email protected]> OMEGA clock driver

11. [12]Casey Crellin <[email protected]> vxWorks (Tornado) port and

help with target configuration

12. [13]Sven Dietrich <[email protected]> Palisade reference

clock driver, NT adj. residuals, integrated Greg's Winnt port.

13. [14]John A. Dundas III <[email protected]> Apple A/UX port

14. [15]Torsten Duwe <[email protected]> Linux

port

15. [16]Dennis Ferguson <[email protected]> foundation code for

NTP Version 2 as specified in RFC-1119

16. [17]Glenn Hollinger <[email protected]> GOES clock driver

17. [18]Mike Iglesias <[email protected]> DEC Alpha port

18. [19]Jim Jagielski <[email protected]> A/UX port

19. [20]Jeff Johnson <[email protected]> massive prototyping

overhaul

20. [21]Hans Lambermont <[email protected]> or

[22]<[email protected]> ntpsweep

21. [23]Poul-Henning Kamp <[email protected]> Oncore driver (Original

author)

22. [24]Frank Kardel [25]<[email protected]>

PARSE <GENERIC> driver (14 reference clocks), STREAMS modules for

PARSE, support scripts, syslog cleanup

23. [26]William L. Jones <[email protected]> RS/6000 AIX

modifications, HPUX modifications

24. [27]Dave Katz <[email protected]> RS/6000 AIX port

25. [28]Craig Leres <[email protected]> 4.4BSD port, ppsclock,

Magnavox

GPS clock driver

26. [29]George Lindholm <[email protected]> SunOS 5.1 port

27. [30]Louis A. Mamakos <[email protected]> MD5-based authentication

28. [31]Lars H. Mathiesen <[email protected]> adaptation of foundation

code for Version 3 as specified in RFC-1305

29. [32]David L. Mills <[email protected]> Version 4 foundation: clock

discipline, authentication, precision kernel; clock drivers:

Spectracom, Austron, Arbiter, Heath, ATOM, ACTS, KSI/Odetics;

audio clock drivers: CHU, WWV/H, IRIG

30. [33]Wolfgang Moeller <[email protected]> VMS port

31. [34]Jeffrey Mogul <[email protected]> ntptrace utility

32. [35]Tom Moore <[email protected]> i386 svr4 port

33. [36]Kamal A Mostafa <[email protected]> SCO OpenServer port

34. [37]Derek Mulcahy <[email protected]> and [38]Damon

Hart-Davis <[email protected]> ARCRON MSF clock driver

35. [39]Rainer Pruy <[email protected]>

monitoring/trap scripts, statistics file handling

36. [40]Dirce Richards <[email protected]> Digital UNIX V4.0 port

37. [41]Wilfredo Sánchez <[email protected]> added support for

NetInfo

38. [42]Nick Sayer <[email protected]> SunOS streams modules

39. [43]Jack Sasportas <[email protected]> Saved a Lot of

space on the stuff in the html/pic/ subdirectory

40. [44]Ray Schnitzler <[email protected]> Unixware1 port

41. [45]Michael Shields <[email protected]> USNO clock driver

42. [46]Jeff Steinman <[email protected]> Datum PTS clock

driver

43. [47]Harlan Stenn <[email protected]> GNU automake/autoconfigure

makeover, various other bits (see the ChangeLog)

44. [48]Kenneth Stone <[email protected]> HP-UX port

NetClock/GPS Instruction Manual

Model 9283

45. [49]Ajit Thyagarajan <[email protected]>IP multicast/anycast

support

46. [50]Tomoaki TSURUOKA <[email protected]>TRAK clock

driver

47. [51]Paul A Vixie <[email protected]> TrueTime GPS driver, generic

TrueTime clock driver

48. [52]Ulrich Windl <[email protected]> corrected and

validated HTML documents according to the HTML DTD

_________________________________________________________________

[53]gif

[54]David L. Mills <[email protected]>

References

1. mailto:[email protected]

2. mailto:[email protected]

3. mailto:[email protected]

4. mailto:[email protected]

5. mailto:[email protected]

6. mailto:[email protected]

7. mailto:[email protected]

8. mailto:[email protected]

9. mailto:[email protected]

10. mailto:[email protected]

11. mailto:[email protected]

12. mailto:[email protected]

13. mailto:[email protected]

14. mailto:[email protected]

15. mailto:[email protected]

16. mailto:[email protected]

17. mailto:[email protected]

18. mailto:[email protected]

19. mailto:jagubox.gsfc.nasa.gov

20. mailto:[email protected]

21. mailto:[email protected]

22. mailto:[email protected]

23. mailto:[email protected]

24. http://www4.informatik.uni-erlangen.de/~kardel

25. mailto:[email protected]

26. mailto:[email protected]

27. mailto:[email protected]

28. mailto:[email protected]

29. mailto:[email protected]

30. mailto:[email protected]

31. mailto:[email protected]

32. mailto:[email protected]

33. mailto:[email protected]

34. mailto:[email protected]

35. mailto:[email protected]

36. mailto:[email protected]

37. mailto:[email protected]

38. mailto:[email protected]

39. mailto:[email protected]

40. mailto:[email protected]

41. mailto:[email protected]

42. mailto:[email protected]

43. mailto:[email protected]

44. mailto:[email protected]

45. mailto:[email protected]

46. mailto:pebbles.jpl.nasa.gov

47. mailto:[email protected]

48. mailto:[email protected]

49. mailto:[email protected]

50. mailto:[email protected]

51. mailto:[email protected]

52. mailto:[email protected]

53. file://localhost/backroom/ntp-stable/html/index.htm

54. mailto:[email protected]

This file is part of the OpenSSH software.

The licences which components of this software fall under are as follows. First, we will summarize and say that all components are under a BSD licence, or a licence more free than that.

OpenSSH contains no GPL code.

1)

* Copyright (c) 1995 Tatu Ylonen <[email protected]>, Espoo, Finland

* All rights reserved

*

* As far as I am concerned, the code I have written for this software

* can be used freely for any purpose. Any derived versions of this

* software must be clearly marked as such, and if the derived work is

* incompatible with the protocol description in the RFC file, it must be

* called by a name other than "ssh" or "Secure Shell".

[Tatu continues]

* However, I am not implying to give any licenses to any patents or

* copyrights held by third parties, and the software includes parts that

* are not under my direct control. As far as I know, all included

* source code is used in accordance with the relevant license agreements

* and can be used freely for any purpose (the GNU license being the most

* restrictive); see below for details.

[However, none of that term is relevant at this point in time. All of

these restrictively licenced software components which he talks about

have been removed from OpenSSH, i.e.,

- RSA is no longer included, found in the OpenSSL library

8-1

Model 9283

- IDEA is no longer included, its use is deprecated

- DES is now external, in the OpenSSL library

- GMP is no longer used, and instead we call BN code from OpenSSL

- Zlib is now external, in a library

- The make-ssh-known-hosts script is no longer included

- TSS has been removed

- MD5 is now external, in the OpenSSL library

- RC4 support has been replaced with ARC4 support from OpenSSL

- Blowfish is now external, in the OpenSSL library

[The licence continues]

Note that any information and cryptographic algorithms used in this

software are publicly available on the Internet and at any major

bookstore, scientific library, and patent office worldwide. More

information can be found e.g. at "http://www.cs.hut.fi/crypto".

The legal status of this program is some combination of all these

permissions and restrictions. Use only at your own responsibility.

You will be responsible for any legal consequences yourself; I am not

making any claims whether possessing or using this is legal or not in

your country, and I am not taking any responsibility on your behalf.

NO WARRANTY

BECAUSE THE PROGRAM IS LICENSED FREE OF CHARGE, THERE IS NO

WARRANTY

FOR THE PROGRAM, TO THE EXTENT PERMITTED BY APPLICABLE LAW. EXCEPT

WHEN

OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR OTHER

PARTIES

PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY OF ANY KIND, EITHER

EXPRESSED

OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES

OF

MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. THE ENTIRE

RISK AS

TO THE QUALITY AND PERFORMANCE OF THE PROGRAM IS WITH YOU. SHOULD

THE

PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF ALL NECESSARY

SERVICING,

REPAIR OR CORRECTION.

IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN

WRITING

WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MAY MODIFY AND/OR

REDISTRIBUTE THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR

DAMAGES,

INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES

ARISING

OUT OF THE USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT

LIMITED

TO LOSS OF DATA OR DATA BEING RENDERED INACCURATE OR LOSSES

SUSTAINED BY

YOU OR THIRD PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH

ANY OTHER

PROGRAMS), EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF

THE

POSSIBILITY OF SUCH DAMAGES.

2)

The 32-bit CRC implementation in crc32.c is due to Gary S. Brown.

Comments in the file indicate it may be used for any purpose without

restrictions:

* COPYRIGHT (C) 1986 Gary S. Brown. You may use this program, or

* code or tables extracted from it, as desired without restriction.

3)

The 32-bit CRC compensation attack detector in deattack.c was

contributed by CORE SDI S.A. under a BSD-style license.

* Cryptographic attack detector for ssh - source code

*

* Copyright (c) 1998 CORE SDI S.A., Buenos Aires, Argentina.

*

* All rights reserved. Redistribution and use in source and binary

* forms, with or without modification, are permitted provided that

* this copyright notice is retained.

*

* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED

* WARRANTIES ARE DISCLAIMED. IN NO EVENT SHALL CORE SDI S.A. BE

* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY

OR

* CONSEQUENTIAL DAMAGES RESULTING FROM THE USE OR MISUSE OF THIS

* SOFTWARE.

*

* Ariel Futoransky <[email protected]>

* <http://www.core-sdi.com>

4)

ssh-keygen was contributed by David Mazieres under a BSD-style

license.

* Copyright 1995, 1996 by David Mazieres <[email protected]>.

*

* Modification and redistribution in source and binary forms is

* permitted provided that due credit is given to the author and the

* OpenBSD project by leaving this copyright notice intact.

5)

The Rijndael implementation by Vincent Rijmen, Antoon Bosselaers

and Paulo Barreto is in the public domain and distributed

with the following license:

* @version 3.0 (December 2000)

*

8-2

Spectracom Corporation

* Optimised ANSI C code for the Rijndael cipher (now AES)

*

* @author Vincent Rijmen <[email protected]>

* @author Antoon Bosselaers

<[email protected]>

* @author Paulo Barreto <[email protected]>

*

* This code is hereby placed in the public domain.

*

* THIS SOFTWARE IS PROVIDED BY THE AUTHORS ''AS IS'' AND ANY

EXPRESS

* OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE

IMPLIED

* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR

PURPOSE

* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS

BE

* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,

OR

* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,

PROCUREMENT OF

* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR

* BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF

LIABILITY,

* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING

NEGLIGENCE

* OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS

SOFTWARE,

* EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

6)

One component of the ssh source code is under a 4-clause BSD license,

held by the University of California, since we pulled these parts from

original Berkeley code. The Regents of the University of

California

have declared that term 3 is no longer enforceable on their source code,

but we retain that license as is.

* Copyright (c) 1983, 1990, 1992, 1993, 1995

* The Regents of the University of California. All rights reserved.

*

* Redistribution and use in source and binary forms, with or without

* modification, are permitted provided that the following conditions

* are met:

* 1. Redistributions of source code must retain the above copyright

* notice, this list of conditions and the following disclaimer.

* 2. Redistributions in binary form must reproduce the above copyright

* notice, this list of conditions and the following disclaimer in the

* documentation and/or other materials provided with the distribution.

* 3. All advertising materials mentioning features or use of this software

* must display the following acknowledgement:

* This product includes software developed by the University of

* California, Berkeley and its contributors.

* 4. Neither the name of the University nor the names of its contributors

* may be used to endorse or promote products derived from this software

* without specific prior written permission.

*

* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS

IS'' AND

* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED

TO, THE

* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A

PARTICULAR PURPOSE

* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS

BE LIABLE

* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR

CONSEQUENTIAL

* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF

SUBSTITUTE GOODS

* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS

INTERRUPTION)

* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN

CONTRACT, STRICT

* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING

IN ANY WAY

* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE

POSSIBILITY OF

* SUCH DAMAGE.

7)

Remaining components of the software are provided under a standard

2-term BSD licence with the following names as copyright holders:

Friedl

Theo de Raadt

Provos

Song

Campbell

Miller

Steves

Kouril

Allansson

* Redistribution and use in source and binary forms, with or without

* modification, are permitted provided that the following conditions

* are met:

* 1. Redistributions of source code must retain the above copyright

NetClock/GPS Instruction Manual

Spectracom Corporation

* notice, this list of conditions and the following disclaimer.

* 2. Redistributions in binary form must reproduce the above copyright

* notice, this list of conditions and the following disclaimer in the

* documentation and/or other materials provided with the distribution.

*

* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY

EXPRESS OR

* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED

WARRANTIES

* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE

DISCLAIMED.

* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,

* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES

(INCLUDING, BUT

* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;

LOSS OF USE,

* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND

ON ANY

* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR

TORT

* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF

THE USE OF

* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH

DAMAGE.

LICENSE ISSUES

==============

The OpenSSL toolkit stays under a dual license, i.e. both the conditions of

the OpenSSL License and the original SSLeay license apply to the toolkit.

See below for the actual license texts. Actually both licenses are

BSD-style

Open Source licenses. In case of any license issues related to

OpenSSL

please contact [email protected].

OpenSSL License

---------------

/* ====================================================================

* Copyright (c) 1998-2003 The OpenSSL Project. All rights reserved.

*

* Redistribution and use in source and binary forms, with or without

* modification, are permitted provided that the following conditions

* are met:

*

* 1. Redistributions of source code must retain the above copyright

* notice, this list of conditions and the following disclaimer.

*

* 2. Redistributions in binary form must reproduce the above copyright

* notice, this list of conditions and the following disclaimer in

* the documentation and/or other materials provided with the

* distribution.

*

* 3. All advertising materials mentioning features or use of this

* software must display the following acknowledgment:

* "This product includes software developed by the OpenSSL Project

* for use in the OpenSSL Toolkit. (http://www.openssl.org/)"

*

* 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to

* endorse or promote products derived from this software without

* prior written permission. For written permission, please contact

* [email protected].

*

* 5. Products derived from this software may not be called "OpenSSL"

* nor may "OpenSSL" appear in their names without prior written

* permission of the OpenSSL Project.

*

* 6. Redistributions of any form whatsoever must retain the following

* acknowledgment:

* "This product includes software developed by the OpenSSL Project

* for use in the OpenSSL Toolkit (http://www.openssl.org/)"

*

* THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY

* EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE

* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR

* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR

* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,

* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT

* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;

* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)

* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,

* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)

* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED

* OF THE POSSIBILITY OF SUCH DAMAGE.

* ====================================================================

*

* This product includes cryptographic software written by Eric Young

* ([email protected]). This product includes software written by Tim

* Hudson ([email protected]).

*

*/

Original SSLeay License

-----------------------

/* Copyright (C) 1995-1998 Eric Young ([email protected])

* All rights reserved.

*

* This package is an SSL implementation written

* by Eric Young ([email protected]).

* The implementation was written so as to conform with Netscapes SSL.

*

* This library is free for commercial and non-commercial use as long as

NetClock/GPS Instruction Manual

Model 9283

* the following conditions are aheared to. The following conditions

* apply to all code found in this distribution, be it the RC4, RSA,

* lhash, DES, etc., code; not just the SSL code. The SSL documentation

* included with this distribution is covered by the same copyright terms

* except that the holder is Tim Hudson ([email protected]).

*

* Copyright remains Eric Young's, and as such any Copyright notices in

* the code are not to be removed.

* If this package is used in a product, Eric Young should be given attribution

* as the author of the parts of the library used.

* This can be in the form of a textual message at program startup or

* in documentation (online or textual) provided with the package.

*

* Redistribution and use in source and binary forms, with or without

* modification, are permitted provided that the following conditions

* are met:

* 1. Redistributions of source code must retain the copyright

* notice, this list of conditions and the following disclaimer.

* 2. Redistributions in binary form must reproduce the above copyright

* notice, this list of conditions and the following disclaimer in the

* documentation and/or other materials provided with the distribution.

* 3. All advertising materials mentioning features or use of this software

* must display the following acknowledgement:

* "This product includes cryptographic software written by

* Eric Young ([email protected])"

* The word 'cryptographic' can be left out if the rouines from the library

* being used are not cryptographic related :-).

* 4. If you include any Windows specific code (or a derivative thereof) from

* the apps directory (application code) you must include an acknowledgement:

* "This product includes software written by Tim Hudson

([email protected])"

*

* THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND

* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,

THE

* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR

PURPOSE

* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE

LIABLE

* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR

CONSEQUENTIAL

* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE

GOODS

* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS

INTERRUPTION)

* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,

STRICT

* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN

ANY WAY

* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY

OF

* SUCH DAMAGE.

*

* The licence and distribution terms for any publically available version or

* derivative of this code cannot be changed. i.e. this code cannot simply be

* copied and put under another distribution licence

* [including the GNU Public Licence.]

*/

---- Part 1: CMU/UCD copyright notice: (BSD like) -----

Copyright 1989, 1991, 1992 by Carnegie Mellon University

Derivative Work - 1996, 1998-2000

Copyright 1996, 1998-2000 The Regents of the University of California

Reserved

Permission to use, copy, modify and distribute this software and its documentation for any purpose and without fee is hereby granted, provided that the above copyright notice appears in all copies and that both that copyright notice and this permission notice appear in supporting documentation, and that the name of CMU and The Regents of the University of California not be used in advertising or publicity pertaining to distribution of the software without specific written permission.

CMU AND THE REGENTS OF THE UNIVERSITY OF CALIFORNIA DISCLAIM ALL

WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING ALL IMPLIED

WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL CMU OR

THE REGENTS OF THE UNIVERSITY OF CALIFORNIA BE LIABLE FOR ANY SPECIAL,

INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING

FROM THE LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF

CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN

CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.

---- Part 2: Networks Associates Technology, Inc copyright notice (BSD)

-----

Copyright (c) 2001-2003, Networks Associates Technology, Inc

All rights reserved.

Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met:

* Redistributions of source code must retain the above copyright notice,

this list of conditions and the following disclaimer.

* Redistributions in binary form must reproduce the above copyright

notice, this list of conditions and the following disclaimer in the

documentation and/or other materials provided with the distribution.

* Neither the name of the Networks Associates Technology, Inc nor the

names of its contributors may be used to endorse or promote

products derived from this software without specific prior written

permission.

THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS

``AS

IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED

TO,

THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR

8-3

Model 9283

PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDERS OR

CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,

EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,

PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR

PROFITS;

OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF

LIABILITY,

WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR

OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF

ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

---- Part 3: Cambridge Broadband Ltd. copyright notice (BSD) -----

Portions of this code are copyright (c) 2001-2003, Cambridge Broadband

Ltd.

All rights reserved.

Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met:

* Redistributions of source code must retain the above copyright notice,

this list of conditions and the following disclaimer.

* Redistributions in binary form must reproduce the above copyright

notice, this list of conditions and the following disclaimer in the

documentation and/or other materials provided with the distribution.

* The name of Cambridge Broadband Ltd. may not be used to endorse or

promote products derived from this software without specific prior

written permission.

THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDER ``AS IS'' AND ANY

EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE

IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR

PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER BE

LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR

CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF

SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR

BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,

WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE

OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN

IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

---- Part 4: Sun Microsystems, Inc. copyright notice (BSD) -----

Copyright © 2003 Sun Microsystems, Inc., 4150 Network Circle, Santa

Clara,

California 95054, U.S.A. All rights reserved.

Use is subject to license terms below.

This distribution may include materials developed by third parties.

Sun, Sun Microsystems, the Sun logo and Solaris are trademarks or registered trademarks of Sun Microsystems, Inc. in the U.S. and other countries.

Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met:

* Redistributions of source code must retain the above copyright notice,

this list of conditions and the following disclaimer.

* Redistributions in binary form must reproduce the above copyright

notice, this list of conditions and the following disclaimer in the

documentation and/or other materials provided with the distribution.

* Neither the name of the Sun Microsystems, Inc. nor the

names of its contributors may be used to endorse or promote

products derived from this software without specific prior written

permission.

THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS

``AS

IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED

TO,

THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR

PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDERS OR

CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,

EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,

PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR

PROFITS;

OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF

LIABILITY,

WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR

OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF

ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

---- Part 5: Sparta, Inc copyright notice (BSD) -----

Copyright (c) 2003-2004, Sparta, Inc

All rights reserved.

Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met:

* Redistributions of source code must retain the above copyright notice,

this list of conditions and the following disclaimer.

* Redistributions in binary form must reproduce the above copyright

notice, this list of conditions and the following disclaimer in the

documentation and/or other materials provided with the distribution.

* Neither the name of the Networks Associates Technology, Inc nor the

names of its contributors may be used to endorse or promote

products derived from this software without specific prior written

permission.

THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS

``AS

IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED

TO,

THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR

PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDERS OR

CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,

EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,

PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR

PROFITS;

OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF

LIABILITY,

WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR

OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF

ADVISED OF THE POSSIBILITY OF SUCH DAMAGE

This open software is available for at least three

years, to give any third party, for a charge no more than your

cost of physically performing source distribution, a complete

8-4

Spectracom Corporation

machine-readable copy of the corresponding source code, to be

distributed under the terms of Sections 1 and 2 above on a medium

customarily used for software interchang

NetClock/GPS Instruction Manual

Revision

Level

A

ECN

REVISION HISTORY

Description

Revision A was the first-generation manual for the 9200 series products.

B —

Minor language edits. Replaced System Holdover screen.

Rearranged Option 03: Modem section and corrected reference to

DB9-DB9 modem cable. Removed accuracy specification in

Protocols Supported section. Replaced System Time screen.

Corrected Frequency Output section for 700 mVrms.

Edited Configuring Network Security to correct for changes in SSH and remove references to SSH1 protocol (which is not supported).

Updated System screen. Added Sysplex Timing section before section to include ACTS Server mode. Updated System Log

Configuration screen. Added sections for Option 06, IRIG Input and

1PPS Input.

Notable changes include statements for UL earthing in Installation,

UL disclaimer after the Table of Contents, and some minor material, FTP Statistics material. “Log clear” command has been removed.

Revision to bring manual current to 3.4.0 NetClock software.

E 2156 revising NTP section, and adding product configuration/options table.

Changed antenna cable delay range to ± 50,000,000 nanoseconds.

Clarified regions for Australia-1 and Australia-2 DST rules. Added switching between Client and Console modes. Changed System

GPS Screen (cable delay change). Added IRIG code descriptions.

Spectracom Corporation

95 Methodist Hill Drive

Rochester, NY 14623 www.spectracomcorp.com

Phone: US +1.585.321.5800

Fax: US +1.585.321.5219

advertisement

Was this manual useful for you? Yes No
Thank you for your participation!

* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project

Related manuals

Download PDF

advertisement