Orolia Spectracom EC20S User Manual
  1. Manuals
  2. Brands
  3. Orolia Manuals
  4. Clock
  5. Spectracom EC20S
  6. User manual

Orolia Spectracom EC20S User Manual

Epsilon clock
Hide thumbs
Table of Contents

Advertisement

Quick Links

E
C
PSILON
LOCK
M
EC20S
ODEL
User's Manual
spectracom.com
Ref. Number 170142
Revision : Rev7
26
of February 2018
th

Advertisement

Table of Contents
loading
Need help?

Need help?

Do you have a question about the Spectracom EC20S and is the answer not in the manual?

Questions and answers

Summary of Contents for Orolia Spectracom EC20S

  • Page 1 PSILON LOCK EC20S ODEL User’s Manual spectracom.com Ref. Number 170142 Revision : Rev7 of February 2018...
  • Page 2 SPECTRACOM LIMITED WARRANTY © 2009-2018 Spectracom. All rights reserved. The information in this document has been carefully reviewed and is believed to be accurate and up-to-date. Spectracom assumes no responsibility for any errors or omissions that may be contained in this document, and makes no commitment to keep current the information in this manual, or to notify any person or organization of updates.

  • Page 3: Table Of Contents

    EPSILON CLOCK MODEL EC20S Spectracom TABLE OF CONTENTS TERMINOLOGY ..........................8 OVERVIEW ............................9 Main Features Dimensions and Weight Operating Environment SAFETY PRECAUTIONS ........................12 Power Supply Safety during Adjustments, Maintenance and Repair DELIVERY INSPECTION........................15 Inventory Inspection FRONT AND REAR PANELS DESCRIPTION ..................16 Front Panel Description Back Panel Description PUTTING THE EC20S INTO OPERATION ..................
  • Page 4 Spectracom EPSILON CLOCK MODEL EC20S Ethernet Port Network Services 8.2.1 DHCP Client ..............................23 8.2.2 HTTP SERVER............................. 23 8.2.3 SNMP SERVER ............................23 8.2.4 NTP SERVER ............................... 23 8.2.5 TELNET SERVICE ............................24 8.2.6 FTP SERVICE .............................. 24 8.2.7 ICMP SERVICE ............................24 8.2.8 Monitoring the EC20S by means of nETWORK SERVICES ..............
  • Page 5 EPSILON CLOCK MODEL EC20S Spectracom DISTRIBUTION INTERFACE ......................38 12.1 1PPS Outputs 12.2 10MHz Outputs 12.3 NMEA Output WEB INTERFACE ..........................41 13.1 Welcome Page 13.2 Upper task bar and page header 13.3 Clock Status page 13.3.1 Global Status ..............................45 13.3.2 Alarms ................................
  • Page 6 Spectracom EPSILON CLOCK MODEL EC20S 13.10.5 Download events log ............................. 78 13.11 Software Version 13.12 Software Upgrade 13.13 Admin Page 13.13.1 SYSTEM RESET ............................83 13.13.2 PASSWORD CHANGE..........................83 13.13.3 CONFIGURATION EXTRACTION ......................83 13.14 Reboot SNMP INTERFACE ........................... 86 14.1 MIB Description 14.1.1...
  • Page 7 EPSILON CLOCK MODEL EC20S Spectracom MAINTENANCE ..........................100 18.1 Periodic Verification and Calibration 18.2 Updating the Software Version 18.3 Spare Parts 18.4 Troubleshooting 18.5 Customer Support Information APPENDIX ............................. 102 19.1 NMEA Connector 19.1.1 Pin-Out ................................ 102 19.1.2 NMEA Message Input ..........................104 19.1.3 NMEA Message Output ..........................

  • Page 8: Terminology

    EPSILON CLOCK MODEL EC20S Spectracom 1. TERMINOLOGY 1PPS One Pulse Per Second 1PPS driver Pulse signal obtained through division of the frequency driver DHCP Dynamic Host Configuration Protocol Frequency driver Frequency signal generated by the built-in oscillator File Transfer Protocol European positioning system GALILEO GLObalnaya NAvigatsionnaya Sputnikovaya Sistema (RUS)

  • Page 9: Overview

    Spectracom EPSILON CLOCK MODEL EC20S 2. OVERVIEW MAIN FEATURES The EPSILON CLOCK MODEL EC20S is a multi-GNSS Clock, providing the best cost-effective solution for reliable, and 24-hour-a-day, uninterrupted applications. The EC20S is particularly well-suited for broadcast operators requiring high quality, reliability and availability. The EC20S is well dedicated to digital broadcast applications using SFN (Single Frequency Network) mode.

  • Page 10: Dimensions And Weight

    EPSILON CLOCK MODEL EC20S Spectracom • Up to 10 x 10 MHz outputs • 1 PPS and 10 MHz signals are phased locked, which helps prevent phase jump and wander between time and frequency signals • Remote monitoring via the Ethernet port thanks to built-in supervision interfaces (13 Web Interface, 14 SNMP Interface) - Stratum 1 time stamp over Ethernet 10/100 Base-T (RJ45 port).

  • Page 11: Operating Environment

    Spectracom EPSILON CLOCK MODEL EC20S OPERATING ENVIRONMENT Operating temperature With OCXO : -5 to 60°C With Rubidium Oscillator : -5 to 50°C Storage temperature : -40 to 85°C Relative humidity : 95 % non-condensing Altitude : up to 2500m Pollution degree User’s Manual...

  • Page 12: Safety Precautions

    EPSILON CLOCK MODEL EC20S Spectracom 3. SAFETY PRECAUTIONS POWER SUPPLY • Before switching on the unit, ensure that it is compatible with the local mains supply. (Refer to Setting the EC20S Into Operation). • The plug must be inserted into a socket with earth connection. The safety connection must not be broken by using an extension cord without earth conductor.
  • Page 13 Spectracom EPSILON CLOCK MODEL EC20S DC power cords. The AC source outlet must contain a protective earthing connection. This equipment shall be connected directly to the AC power outlet earthing pin or DC supply system earthing electrode conductor. This equipment shall be located in the same immediate area (such as, adjacent cabinets) as any other equipment that has a connection to the earthing conductor of the same AC or DC supply...

  • Page 14: Safety During Adjustments, Maintenance And Repair

    EPSILON CLOCK MODEL EC20S Spectracom SAFETY DURING ADJUSTMENTS, MAINTENANCE AND REPAIR When the unit is connected to the power supply, it may be dangerous to touch the terminals and parts that may be exposed when opening covers or removing components (except for plug-in components). WARNING The interior of this equipment does not have any user serviceable parts.

  • Page 15: Delivery Inspection

    Spectracom EPSILON CLOCK MODEL EC20S 4. DELIVERY INSPECTION INVENTORY Before installing your Spectracom product, please verify that all material ordered has been received. If there is a discrepancy, please contact Spectracom Customer Service. Customer service is available by telephone at +33 (0) 1.64.53.39.80 (France), or +1.585.321.5800 (United States). Updated contacts information are available on our web site (www.spectracom.com, and refer to the “Support”...

  • Page 16: Front And Rear Panels Description

    EPSILON CLOCK MODEL EC20S Spectracom 5. FRONT AND REAR PANEL S DESCRIPTION FRONT PANEL DESCRIPTION Item Name Description Indicates the status of the AC and DC power supplies. For ‘PWR’ LED POWER LED details, see 11.1. Indicates the current status of the enabled ‘SRC’...

  • Page 17: Back Panel Description

    Spectracom EPSILON CLOCK MODEL EC20S BACK PANEL DESCRIPTION Connector Type Description AC POWER IEC 320 – C14 AC power entry with integrated fuse. DC POWER XLR circular DC power supply input. ‘1PPS J ’ 50 Ω BNC Distributed One Pulse Per Second outputs. ‘10MHz J ’...

  • Page 18: Putting The Ec20S Into Operation

    EPSILON CLOCK MODEL EC20S Spectracom 6. PUTTING THE EC20S IN TO OPERATION The EC20S can be installed in a rack or used as-is. PRELIMINARY CONNECTIONS Before starting the EPSILON CLOCK MODEL EC20S, perform the following steps: • Leave free space of a few centimeters under the unit, in order to make easier natural air flow from bottom to top of the EPSILON CLOCK MODEL EC20S.

  • Page 19: Network Connection

    EPSILON CLOCK MODEL EC20S Spectracom Power-up is immediate when connecting DC WARNING power with the cable, while AC power must be switched on. The connection to the power supplies (AC or DC) can be checked by the ‘PWR’ LED (see 11.1). NETWORK CONNECTION Refer to 8 for the factory network settings.

  • Page 20: Start-Up Sequence

    EPSILON CLOCK MODEL EC20S Spectracom For the basic EC20S configuration, a few recommendations: refer to 7.2 regarding the DC power supply, refer to 9.1 regarding the multi-GNSS synchronization source, refer to 9.2 and 9.3 regarding the External 1PPS/NMEA synchronization source. START-UP SEQUENCE For a standard configuration implementing the multi-GNSS synchronization source, after the system initialization sequence, the GNSS receiver locks to the satellites constellations (event reported by the...

  • Page 21: Power Supply Interface

    EPSILON CLOCK MODEL EC20S Spectracom 7. POWER SUPPLY INTERFACE AC POWER SUPPLY INPUT The AC power supply shall be considered as the main power supply for the EC20S. It shall meet the following features: Use standard power cord type CEE7 VII / IEC320 C13. Nominal AC input voltage : 100 to 240 Volts AC / 50 to 60 Hz On switch...

  • Page 22: Network Interface

    EPSILON CLOCK MODEL EC20S Spectracom The presence of the power supplies (AC or DC) is monitored: by the ‘PWR’ LED (see 11.1), by the ALARMS signalling (see 11.2.2), via the web interface (see 13.3.2.6), via the SNMP service (see 14.1.1, SNMP parameters 18 and 19). 8.

  • Page 23: Network Services

    EPSILON CLOCK MODEL EC20S Spectracom NETWORK SERVICES The EC20S incorporates the following network services: 8.2.1 DHCP CLIENT The EC20S incorporates a DHCP client using the port numbers 67 and 68 to get (if so configured) from a remote DHCP server a dynamic IP address assigned to its Ethernet port. 8.2.2 HTTP SERVER The EC20S can be monitored via a web interface using the HTTP protocol.

  • Page 24: Telnet Service

    EPSILON CLOCK MODEL EC20S Spectracom leap indicator = 11 : when SFN status is ‘Off’. leap indicator = 00 : when SFN status is ‘On’ and no leap second shall be applied. leap indicator = 01 : when SFN status is ‘On’ and a positive leap second shall be applied. leap indicator = 10 : when SFN status is ‘On’...

  • Page 25: Synchronization Sources

    EPSILON CLOCK MODEL EC20S Spectracom 9. SYNCHRONIZATION SOURCES MULTI-GNSS SYNCHRONIZATION SOURCE The EC20S incorporates a multi-GNSS receiver delivering a 1PPS which can be selected as a synchronization source (GNSS source). The GNSS source can be composed with one or two satellites constellations by the user as follows (See 80, 81 and 82 for the details): GPS constellation only, or GLONASS constellation only, or GALILEO constellation only Both GPS and GLONASS constellations or Both GPS and GALILEO constellations.

  • Page 26: External 1Pps Synchronization Source

    EPSILON CLOCK MODEL EC20S Spectracom To acquire the multi-GNSS signals, a GNSS antenna shall be connected to the ‘GPS antenna’ connector located on the rear panel. The GNSS antenna connector features are the following ones: : Antenna female 50  (type N) Connector type L1 GNSS C/A code Power supply to active antenna...
  • Page 27 EPSILON CLOCK MODEL EC20S Spectracom NOTA: When this synchronization source is not used, it is strongly recommended to disable it (this is the factory setting). See 13.7.3 Priority Level: External 1PPS/NMEA. CAUTION When this synchronization source is used as a backup synchronization source (in conjunction with an external NMEA datation source 9.3 or not), take care that, at the moment the EC20S switches from the main GNSS synchronization source to...

  • Page 28: External Nmea Datation Source

    EPSILON CLOCK MODEL EC20S Spectracom EXTERNAL NMEA DATATION SOURCE An external NMEA datation source can be used in conjunction with the external 1PPS synchronization source to timestamp the 1PPS. The external NMEA datation source shall be received on the ‘NMEA’ SUBD-9 connector on the rear panel: Connector type : 9-pin female SUB-D...

  • Page 29: Disciplining Algorithm - Sfn Conditions

    EPSILON CLOCK MODEL EC20S Spectracom The EC20S automatically selects the synchronization source according to the following criteria: Whether the EC20S is set in ‘Forced Holdover’ mode or not (see 13.7.3 Force Holdover), Whether a synchronization source is forced (see 13.7.3 Force a source as input), Whether the synchronization source is enabled or disabled (see 13.7.3 Priority Level), The status of the synchronization source (OK/Alarm, see 13.3.2.3 and 13.3.2.5), The priority of the synchronization source (see 13.7.3 Priority Level).
  • Page 30 EPSILON CLOCK MODEL EC20S Spectracom • Holdover : The oscillator disciplining has been suspended because there is no valid synchronization source to synchronize to. The oscillator control remains steady on the last valid value. • Forced Holdover: The oscillator disciplining has been suspended upon user request (see 13.7.3 Force Holdover).

  • Page 31: Synchronization Signals Distribution

    EPSILON CLOCK MODEL EC20S Spectracom 10.3 SYNCHRONIZATION SIGNALS DISTRIBUTION The distribution of the synchronization signals (1PPS, 10MHz) depends on the mute mode (defaulted to ‘Automatic’ mode, see 72 and 73). In ‘Disabled’ mode, the synchronization signals (1PPS, 10MHz) are ALWAYS delivered (once the initialization of the EC20S is complete) –...

  • Page 32: Start-Up Sequence Detail

    EPSILON CLOCK MODEL EC20S Spectracom 10.3.1 START-UP SEQUENCE DETAIL Following diagrams show the status of the EC20S product during the start-up step (in brackets, the references of the status definitions): POWER GNSS Lock [14] Alarm (Searching for satellites) OK (the GNSS source is Locked) Tracking Status [7] Init.

  • Page 33: Short Loss Of The Gnss Source Sequence Detail

    EPSILON CLOCK MODEL EC20S Spectracom 10.3.2 SHORT LOSS OF THE GNSS SOURCE SEQUENCE DETAIL Following diagrams show the status of the EC20S product while the GNSS source is lost (in brackets, the references of the status definitions): POWER GNSS Lock [14] OK (the GNSS OK (the GNSS source is Locked)

  • Page 34: Source Change Sequence Detail

    EPSILON CLOCK MODEL EC20S Spectracom 10.3.3 SOURCE CHANGE SEQUEN CE DETAIL Following diagrams show the status of the EC20S product upon switching of synchronization source (in brackets, the references of the status definitions): POWER GNSS Lock [14] OK (the GNSS Alarm (Searching for satellites) source is Locked) External...

  • Page 35: Holdover Sequence Detail

    EPSILON CLOCK MODEL EC20S Spectracom 10.3.4 HOLDOVER SEQUENCE DE TAIL Following diagrams show the status of the EC20S product while there is no valid synchronization source (in brackets, the references of the status definitions): POWER GNSS Lock [14] OK (the GNSS Alarm (Searching for satellites) OK (the GNSS source is Locked) source is Locked)

  • Page 36: Signalling Interfaces

    EPSILON CLOCK MODEL EC20S Spectracom 11. SIGNALLING INTERFACES The EC20S incorporates two signalling interfaces: A visual signalling, via three LEDs located on the front panel (see 11.1), An ALARMS signalling, via alarm signals output on the ‘ALARMS’ SUBD-9 connector located on the rear panel (see 11.2).

  • Page 37: Alarms Signaling

    EPSILON CLOCK MODEL EC20S Spectracom DISTRIBUTION LED – ‘DST’ Indicates the current status of the distributed 1PPS and 10MHz signals. No distribution or error on 1PPS and 10MHz outputs. No distribution on 1PPS or 10MHz outputs (the Mute function is enabled). Blinking Yellow Distributions of signals are provided without accuracy.

  • Page 38: Urgent Alarms

    EPSILON CLOCK MODEL EC20S Spectracom ‘Urgent Alarms’ which need an urgent intervention of the maintenance operator, ‘Non-Urgent Alarms’ which need a non urgent intervention of the maintenance operator, According to the selected wiring for the alarm monitor, a relay can be closed or open when an 'Urgent Alarm' or a 'Non-Urgent Alarm' is raised.

  • Page 39: 1Pps Outputs

    EPSILON CLOCK MODEL EC20S Spectracom 10MHz synchronization signals on the ‘J2n’ BNC connectors located on the rear panel, Time Of Day messages on the ‘NMEA’ SUBD-9 connector located on the rear panel. 12.1 1PPS OUTPUTS Number of outputs Connector type : 50Ω...
  • Page 40 EPSILON CLOCK MODEL EC20S Spectracom Port configuration : Asynchronous RS232C, 9600 bauds, 8 bits, 1 stop bit, no parity. TOD messages format : GPRMC from NMEA 0183 V3.01 For detailed information about this output interface, refer to the appendix 19.1 and 19.1.3. User’s Manual...

  • Page 41: Web Interface

    EPSILON CLOCK MODEL EC20S Spectracom 13. WEB INTERFACE To access the EC20S web interface, connect a Personal Computer (PC) to the EC20S Ethernet port and launch a HTTP navigator with the EC20S IP address. The PC Operating System can be Windows or Linux. The EC20S web interface has been tested with the following HTTP navigators: Firefox Internet Explorer...

  • Page 42: Upper Task Bar And

    EPSILON CLOCK MODEL EC20S Spectracom 13.2 UPPER TASK BAR AND PAGE HEADER This menu bar gives access to the following menus: a. System Setup: i. Network setup : Network connection parameters (protected by the administrator password) ii. SNMP setup : SNMP parameters and traps enable (protected by the administrator password) iii.
  • Page 43 EPSILON CLOCK MODEL EC20S Spectracom The <Date> format and the <Timescale> of the Time Of Day message can be set in the "Time and Synchronization Source Setup” menu (see 13.7.2). 2. TIMESCALE OF THE TIME OF DAY MESSAGE The timescale associated with the Time Of Day message (displayed in the web pages header) is defined by an alphabetic character as follows: U: UTC timescale (either UTC-USNO from GPS constellation or UTC-SU from GLONASS constellation)

  • Page 44: Clock Status Page

    EPSILON CLOCK MODEL EC20S Spectracom 13.3 CLOCK STATUS PAGE User’s Manual...

  • Page 45: Global Status

    EPSILON CLOCK MODEL EC20S Spectracom This page is automatically refreshed every 8 seconds. 13.3.1 GLOBAL STATUS 3. EC20S STATUS Global working status of EC20S: - OK Neither urgent alarm nor non-urgent alarm is raised. The distribution of the synchronization signals (1PPS, 10MHz) is OK. - Warning A non-urgent alarm is raised (refer to 11.2.1 to know the list of the non-urgent alarms).
  • Page 46 EPSILON CLOCK MODEL EC20S Spectracom Range from 0V to 8V. Generates an Internal Oscillator alarm when the value reaches 0V or 8V, meaning that the EC20S is no longer able to drive the Internal Oscillator. User’s Manual...

  • Page 47: Alarms

    EPSILON CLOCK MODEL EC20S Spectracom 7. TRACKING STATUS Disciplining algorithm status: - Warming up The EC20S internal oscillator is warming up. - Tracking search The EC20S receiver is searching best disciplining conditions. - Locked The EC20S receiver meets the ‘Locked’ conditions (see 10.2). - Holdover The oscillator disciplining has been suspended because there is no valid synchronization source to synchronize to.
  • Page 48 EPSILON CLOCK MODEL EC20S Spectracom Monitored status of internal 1PPS generated from oscillator frequency: - OK 1PPS driver operational. - Alarm 1PPS driver failure. 13.3.2.2 SYNCHRONIZATION 12. PHASE ACCURACY Status of the estimated phase accuracy during a holdover period: - OK The phase accuracy is below the Alarm Phase Threshold (see 13.7.3).
  • Page 49 EPSILON CLOCK MODEL EC20S Spectracom - Unpowered GNSS antenna is disconnected or incorrectly powered. Use of an antenna splitter produces this message. No alarm generated for this reason. - Powered GNSS antenna is connected and correctly powered. - Shorted GNSS antenna is in short-circuit status. 13.3.2.4 GNSS MODULE STATUS Working state of the GNSS receiver: - OK...
  • Page 50 EPSILON CLOCK MODEL EC20S Spectracom Status of AC power: - OK AC power is present. - Alarm AC power is missing. - Disabled AC power alarm is disabled by the user (See 13.9 Power Setup). User’s Manual...

  • Page 51: Output Status

    EPSILON CLOCK MODEL EC20S Spectracom 19. DC Status of DC power: - OK DC power is present. - Alarm DC power is missing. - Disabled DC power alarm is disabled by the user (See 13.9 Power Setup). 13.3.2.7 DISTRIBUTION 20. GLOBAL 10 MHZ OUTPUTS Monitoring of the frequency output signals delivered by the EC20S: - OK Every 10MHz output delivers a valid signal.

  • Page 52: Gnss Status

    EPSILON CLOCK MODEL EC20S Spectracom - Disabled The 10MHz/1PPS output is not available in the EC20S device model. 13.3.4 GNSS STATUS 22. GNSS RECEIVER MODEL The GNSS receiver model implemented in the EC20S equipment is displayed in the “GNSS Status” header. 23.
  • Page 53 EPSILON CLOCK MODEL EC20S Spectracom - GPS Global Positioning System (USA positioning system). - GLONASS GLObalnaya NAvigatsionnaya Sputnikovaya Sistema (Russian positioning system). - GALILEO European positioning system. User’s Manual...
  • Page 54 EPSILON CLOCK MODEL EC20S Spectracom 29. USED SATELLITES Number of GNSS channels, per satellites constellation, used by the GNSS receiver to compute the time and/or the position. 30. BEST SATELLITES ID / SNR: Satellite channel identifier and SNR (Signal over Noise Ratio) of the 8 best satellite channels tracked by the GNSS receiver.

  • Page 55: Administrator Password Page

    EPSILON CLOCK MODEL EC20S Spectracom 13.4 ADMINISTRATOR PASSWORD PAGE An administrator password (called ‘Admin’ password) is necessary to access the setup pages. The default password is ‘pwd’. It can be modified in the “Admin” page (see 13.13). WARNING If the user doesn’t remember the password, the EC20S product must come back to Spectracom to reset the device to its default password.

  • Page 56: Network Setup Page

    EPSILON CLOCK MODEL EC20S Spectracom 13.5 NETWORK SETUP PAGE This page allows the user to modify the Network settings. 34. HOST NAME Unique name of the EC20S in the network. This functionality depends on the DNS server type. NOTA: The header of the EC20S Application Window is built as follows: <Host name> - EC20S.
  • Page 57 EPSILON CLOCK MODEL EC20S Spectracom 36. IP ADDRESS, SUB-NETWORK MASK, SUB-NETWORK ADDRESS, BROADCAST ADDRESS, DEFAULT GATEWAY: When the DHCP service is not required (‘Use DHCP’=’No’), these input fields are applied to configure the network access. NOTA: The network configuration can be reset to factory settings at any time while pressing, more than 2 seconds, the ‘Factory Reset’...

  • Page 58: Snmp & Traps Setup Page

    EPSILON CLOCK MODEL EC20S Spectracom 13.6 SNMP & TRAPS SETUP PAGE User’s Manual...
  • Page 59 EPSILON CLOCK MODEL EC20S Spectracom In this page, the operator can enable/disable the SNMP traps generation and program the Read Only (RO) and the Read Write (RW) SNMP communities. The SNMP traps report an event (an alarm, the end of an alarm or a new setup) by sending a trap message. 37.
  • Page 60 EPSILON CLOCK MODEL EC20S Spectracom - No No trap is generated. User’s Manual...
  • Page 61 EPSILON CLOCK MODEL EC20S Spectracom 45. EXTERNAL 1PPS FAULT - Yes Generates a trap when the External 1PPS is lost (while enabled). - No No trap is generated. 46. NMEA FAULT - Yes Generates a trap when the NMEA input is lost (while enabled). - No No trap is generated.
  • Page 62 EPSILON CLOCK MODEL EC20S Spectracom 52. TRACKING STATUS - Yes Generates a trap when the tracking status changes. - No No trap is generated. 53. POWER FAULT - Yes Generates a trap when any enabled power source alarm is detected. - No No trap is generated.

  • Page 63: Time & Synchronization Source Setup Page

    EPSILON CLOCK MODEL EC20S Spectracom 13.7 TIME & SYNCHRONIZATION SOURCE SETUP PAGE This page is used for setting time computation and display parameters, synchronization source parameters, and distribution parameters. User’s Manual...

  • Page 64: User-Defined Datation

    EPSILON CLOCK MODEL EC20S Spectracom 13.7.1 USER-DEFINED DATATION 57. DATE, TIME AND DATATION SUBMISSION BUTTON Time can be set by the user when the EC20S is in ‘Forced Holdover’ mode or when the EC20S has not been synchronized yet to a datation source (GNSS source, External NMEA datation source).
  • Page 65 EPSILON CLOCK MODEL EC20S Spectracom For ToD messages on the web pages, see 13.2 Upper Task Bar and Page Header description. User’s Manual...

  • Page 66: Synchronization Setup

    EPSILON CLOCK MODEL EC20S Spectracom 61. USER-DEFINED LEAP SECOND Leap second adjustment set by the user, hence ensuring it will be applied even in case of GNSS loss. Direction in which the leap second shall be applied: Non leap second pending - –1 Positive leap second pending - +1...
  • Page 67 EPSILON CLOCK MODEL EC20S Spectracom - Off Normal disciplining mode (the oscillator disciplining is in progress) User’s Manual...
  • Page 68 EPSILON CLOCK MODEL EC20S Spectracom 66. PRIORITY LEVEL: GNSS Priority of the GNSS synchronization source: - Priority 1 Highest priority - Priority 2 Medium priority - Priority 3 Lowest priority - Disabled Disable the source; this source is no longer part of the synchronization sources;...

  • Page 69: Distribution Setup

    EPSILON CLOCK MODEL EC20S Spectracom 70. ALARM PHASE THRESHOLD Threshold for the Phase Accuracy, used during a holdover period, to determine whether the 1PPS signals are still valid (the estimated phase accuracy is below the threshold) or not (the estimated phase accuracy is above the threshold). See 13.3.2.2. Unity: nanosecond. Range=[0, 100000].

  • Page 70: Distribution Status For "On Time" Mute Mode

    EPSILON CLOCK MODEL EC20S Spectracom first time, the output 1PPS signals are always distributed whatever their quality is. 73. MUTE MODE FOR 10MHZ The mute mode for the output 1PPS signals: - Disabled Output 10MHz signals are always distributed whatever their quality is.
  • Page 71 EPSILON CLOCK MODEL EC20S Spectracom 76. ENABLE AFTER LOCK OF A SYNC SOURCE This delay starts upon the selection of a valid synchronization source (if no synchronization source was selected before). The synchronization signals (1PPS, 10MHz) are distributed once this delay has elapsed. Unity: second. User’s Manual...

  • Page 72: Gnss Setup Page

    EPSILON CLOCK MODEL EC20S Spectracom 13.8 GNSS SETUP PAGE On this page, the operator set the GNSS receiver parameters. 77. GNSS ANTENNA DELAY Time shift that compensates the propagation delay of the GNSS signal through the antenna cable. To be computed according to the type and the length of cable. Unity: nanosecond. 78.
  • Page 73 EPSILON CLOCK MODEL EC20S Spectracom then transits to 0D reception mode. That means that the GNSS receiver tracks only one satellite channel and then improves the accuracy of the time. - Stationary The GNSS antenna is stationary and its accurate position is input by the user.
  • Page 74 EPSILON CLOCK MODEL EC20S Spectracom - No The GLONASS satellites constellation is not part of the GNSS synchronization source. Note that equipped with software version higher than 16.4, EC20S device includes automatically GLONASS license when using integrated RES SMT GG type receivers. 82.

  • Page 75: Power Setup Page

    EPSILON CLOCK MODEL EC20S Spectracom 13.9 POWER SETUP PAGE According to actual power supply connection, the operator must set which power alarm (AC or DC, left and right) should be enabled. 83. AC POWER Check AC power supply: - Enable: Generates an alarm if AC power supply is not available.

  • Page 76: Events Logging

    EPSILON CLOCK MODEL EC20S Spectracom 13.10 EVENTS LOGGING This page displays the events log recorded by the EC20S in a chronological order. User’s Manual...

  • Page 77: Event Origin

    EPSILON CLOCK MODEL EC20S Spectracom 13.10.1 EVENT ORIGIN The Module column of the events log indicates the event origin: EC20S General EC20S event (event coming from the Management Board which is the EC20S main board), 13.10.2 EVENT GRAVITY The events are classified according to a gravity criterion: Alarm The event reports a temporary or permanent dysfunction of a major function and can affect the normal functioning of the EC20S.

  • Page 78: Clear Events Log

    EPSILON CLOCK MODEL EC20S Spectracom 13.10.4 CLEAR EVENTS LOG Click on the ‘Clear events log’ button to clear the events log buffer. 13.10.5 DOWNLOAD EVENTS LOG Right click on the ‘Download events log’ link to download the events log. A left click only displays the whole events log.
  • Page 79 EPSILON CLOCK MODEL EC20S Spectracom Archive version: Version of the EC20S software. System version: Version of the EC20S system. Firmware version: Version of the firmware of the EC20S FPGA. 86. GNSS FIRMWARE VERSION Name and Firmware version of the built-in GNSS receiver. User’s Manual...

  • Page 80: Software Upgrade

    EPSILON CLOCK MODEL EC20S Spectracom 13.12 SOFTWARE UPGRADE This page allows to upgrade the EC20S software. WARNING Extracted configuration archive file (see 13.13.3) shall not be uploaded. These files only aim at providing trouble-shooting support data. To upgrade the EC20S software, follow these steps: Select the software archive to upload (usually a .tgz file provided by the manufacturer) with the browser button.
  • Page 81 EPSILON CLOCK MODEL EC20S Spectracom Uploading is complete when the below screen is displayed: Then start the next software installation on the EC20S target while clicking on the ‘Install’ button. Once the new software is installed, the EC20S automatically reboots. User’s Manual...

  • Page 82: Admin Page

    EPSILON CLOCK MODEL EC20S Spectracom 13.13 ADMIN PAGE User’s Manual...

  • Page 83: System Reset

    EPSILON CLOCK MODEL EC20S Spectracom 13.13.1 SYSTEM RESET To reinitialize the EC20S operational settings, two ways are possible: 87. RESET TO DEFAULT SETUP Click on the ‘Activate’ button to reset the EC20S current settings to the factory settings. Note that the network settings are not reset. WARNING ALL the setup parameters (except the network parameters) are reset to their factory setting.

  • Page 84: Reboot

    EPSILON CLOCK MODEL EC20S Spectracom Click on the ‘Extract’ button to copy the EC20S settings in the configuration archive file Ec20s_configuration_archive_file.tgz. Right click on the ‘Download Configuration Archive File’ button to download the configuration archive file Ec20s_configuration_archive_file.tgz from the EC20S device. WARNING Extracted configuration archive file aims at providing trouble-shooting support data.
  • Page 85 EPSILON CLOCK MODEL EC20S Spectracom A ‘Software’ reboot: restarts the EC20S software, doesn’t stop the signals distribution (1PPS, 10MHz) when using software version below 17.02 . (but it can deliver inaccurate 1PPS for short periods when restarting starting). stops the signals distribution (1PPS, 10MHz) when using software version 17.02 and higher .

  • Page 86: Snmp Interface

    EPSILON CLOCK MODEL EC20S Spectracom 14. SNMP INTERFACE To access the EC20S SNMP interface, connect a Personal Computer (PC) to the EC20S Ethernet port and launch a SNMP browser with the EC20S IP address. The PC Operating System can be Windows or Linux. 14.1 MIB DESCRIPTION The MIB description file defines the SNMP objects through which the EC20S device can be remotely monitored using the SNMP protocol.
  • Page 87 EPSILON CLOCK MODEL EC20S Spectracom ec20s-STA-FREQ-ALARM ec20s-STA-PHASE-ERROR ec20s-STA-PHASE-ALARM ec20s-STA-REFEXT-PRESENCE ec20s-STA-NMEA-VALIDITY ec20s-STA-HOLDOVER ec20s-STA-DCPOWER-OK ec20s-STA-ACPOWER-OK ec20s-STA-OPT-IRIG-OUT Obsolete ec20s-STA-OPT-STANAG-OUT Obsolete ec20s-STA—OPT-2MHZ-OUT Obsolete ec20s-STA—SFN ec20s-STA-TYPE-OSCILLATEUR 90. PHASE ERROR Phase error estimated by the Kalman filter (kdt) implemented by the disciplining algorithm. 91. FREQUENCY ERROR Frequency error estimated by the Kalman filter (kdf) implemented by the disciplining algorithm.
  • Page 88 EPSILON CLOCK MODEL EC20S Spectracom ec20s-GPS-SAT-SNR2 ec20s-GPS-SAT-ID3 ec20s-GPS-SAT-SNR3 ec20s-GPS-SAT-ID4 ec20s-GPS-SAT-SNR4 ec20s-GPS-SAT-ID5 ec20s-GPS-SAT-SNR5 ec20s-GPS-SAT-ID6 ec20s-GPS-SAT-SNR6 ec20s-GPS-SAT-ID7 ec20s-GPS-SAT-SNR7 ec20s-GPS-SAT-ID8 ec20s-GPS-SAT-SNR8 ec20s-GPS-SAT-ANTENNA-MODE ec20s-GPS-RECEPTION-MODE ec20s-GPS-ANTENNA-STATUS ec20s-GPS-LATITUDE ec20s-GPS-LONGITUDE ec20s-GPS-ALTITUDE 92. GNSS RECEPTION MODE Reception mode (or Tacking mode) of the GNSS receiver: 0D: The GNSS receiver tracks only one satellite channel. This is the mode in which the GNSS receiver transits once it has computed the accurate position of the GNSS antenna (in ‘Automatic’...

  • Page 89: Snmp Configuration Parameters

    EPSILON CLOCK MODEL EC20S Spectracom 2D: The GNSS receiver tracks three satellite channels (in ‘Mobile’ GNSS mode, see 78). 3D: The GNSS receiver tracks at least four satellite channels (in ‘Mobile’ GNSS mode, see 78). NTP STATUS OID Description (Ref.) ec20s-NTP-MAC-ADDRESS ec20s-NTP-STRATUM-LEVEL 93.
  • Page 90 EPSILON CLOCK MODEL EC20S Spectracom ec20s-TRAPS-DESTINATION-1 ec20s-TRAPS-DESTINATION-2 ec20s-TRAPS-COMMUNITY ec20s-TRAPS-ENABLE EC20S CONFIGURATION OID Description (Ref.) ec20s-CFG-FREQ-ALARM-LIMIT ec20s-CFG-PHASE-ALARM-LIMIT ec20s-CFG-DATE-FORMAT ec20s-CFG-1PPS-MUTE-AUTO ec20s-CFG-10MHZ-MUTE-AUTO ec20s-CFG-MUTE-LOST-SOURCES-TIME ec20s-CFG-MUTE-POWER-ON-TIME ec20s-CFG-MUTE-ACQ-SOURCE-TIME ec20s-CFG-RESTART-INETD ec20s-CFG-RESTART-NTP ec20s-CFG-RESTART-WEB ec20s-CFG-RESTART-EC20S 95. RESTART INETD 1: the EC20S restarts the inetd network services (telnet, FTP, uptime). 96.
  • Page 91 EPSILON CLOCK MODEL EC20S Spectracom 98. RESTART EC20S 1: the EC20S unit restarts. User’s Manual...

  • Page 92: Snmp Traps

    EPSILON CLOCK MODEL EC20S Spectracom GNSS CONFIGURATION OID Description (Ref.) ec20s-GNSS-CFG-ANTENNA-MODE ec20s-GNSS-CFG-ANTENNA-LATITUDE ec20s-GNSS-CFG-ANTENNA-LONGITUDE ec20s-GNSS-CFG-ANTENNA-ALTITUDE ec20s-GNSS-CFG-GPS-CONSTELLATION-MODE ec20s-GNSS-CFG-GLONASS-CONSTELLATION-MODE ec20s-GNSS-CFG-GALILEO-CONSTELLATION-MODE 14.1.3 SNMP TRAPS Trap events are asynchronous SNMP messages sent by the EC20S upon changes of some configuration parameters or when an alarm is raised or cancelled. These parameters have an accessible-for-notify access authenticated by the Trap community (which is defaulted to ‘public’).
  • Page 93 EPSILON CLOCK MODEL EC20S Spectracom ec20sNmeaFault ec20sInternalOscFault ec20sInternalppsFault ec20sPhaseAccuracyFault ec20sFreqAccuracyFault ec20sSyncSourceChangeAlarm ec20sEnteringHoldoverModeAlarm ec20sPowerFault ec20sOptionIrig Obsolete ec20sOptionStanag Obsolete ec20sOption2MHz Obsolete ec20sOutputPPSFault ec20sOutput10MHzFault 99. HOLDOVER MODE TRANSITIONS 0: the EC20S exits the ‘Holdover’ mode. 1: the EC20S enters the ‘Holdover’ mode. User’s Manual...

  • Page 94: Command Line Interface (Cli)

    EPSILON CLOCK MODEL EC20S Spectracom 15. COMMAND LINE INTERFA CE (CLI) Some commands are available using a Command Line Interface accessible by the connector ‘ALARMS’ the rear panel. Open a RS232 serial session with the following settings: Speed : 9600 Parity : None Data size...
  • Page 95 EPSILON CLOCK MODEL EC20S Spectracom Menu description: 1 – Use of DHCP DHCP service can be disabled (n = No) or enabled (y = Yes). 2 – Static IP address To set the static IP address of the EC20S. 3 – Sub-network mask To set the sub-network mask of the EC20S.

  • Page 96: Snmp Settings

    EPSILON CLOCK MODEL EC20S Spectracom 15.2 SNMP SETTINGS NOTA: Network addresses and network masks shall be input using the format: xxx.yyy.zzz.www (xxx: decimal value in range [0,255] ; yyy: decimal value in range [0,255] ; zzz: decimal value in range [0,255] ; www: decimal value in range [0,255]).

  • Page 97: Technical Features

    EPSILON CLOCK MODEL EC20S Spectracom … 00:00:01 … In case of a negative leap second, at the time the leap second shall be applied, the time distributed by the Time Of Day messages on the ‘NMEA’ output has the following sequence: …...

  • Page 98: Holdover Mode

    EPSILON CLOCK MODEL EC20S Spectracom Frequency OXCO Rubidium oscillator 10Hz -120dBc/Hz -110dBc/Hz 100Hz -135dBc/Hz -130dBc/Hz 1kHz -145dBc/Hz -140dBc/Hz 10kHz -150dBc/Hz -145dBc/Hz 100kHz -150dBc/Hz -145dBc/Hz 17.1.4 HOLDOVER MODE If all the enabled synchronization sources are unavailable, the EC20S transits into the ‘Holdover’ mode in which it maintains the generation of the Time of Day messages and the synchronization output signals (1PPS, 10MHz).

  • Page 99: Temperature Stability

    EPSILON CLOCK MODEL EC20S Spectracom 100 seconds 3x10 3x10 17.2 TEMPERATURE STABILITY With an OCXO Peak to peak, from 0 to 60°C : 1x10 With a Rubidium Oscillator Peak to peak, from 0 to 50°C : 1x10 17.3 ELECTROMAGNETIC COMPATIBILITY & ROHS COMPLIANCE Complies with the requirements of the standards: EN 61000 –...
  • Page 100 EPSILON CLOCK MODEL EC20S Spectracom 18. MAINTENANCE 18.1 PERIODIC VERIFICATIO N AND CALIBRATION The EC20S operates and calibrates itself fully automatically. It does not require maintenance for a period of 10 years. 18.2 UPDATING THE SOFTWARE VERSION See corresponding web pages to perform EC20S upgrades. 18.3 SPARE PARTS ...
  • Page 101 EPSILON CLOCK MODEL EC20S Spectracom 18.5 CUSTOMER SUPPORT INFORMATION In case of failures, please contact Spectracom Customer Service. Customer service is available by telephone at +33 (0) 1.64.53.39.80 (France), or +1.585.321.5800 (United States). Updated contacts information are available on our web site (www.spectracom.com), and refer to the “Support” page. To speed up the diagnosis of EC20S faults, please send us the current EC20S configuration (see 13.13.3) and the events log (see 13.10.5).
  • Page 102 EPSILON CLOCK MODEL EC20S Spectracom 19. APPENDIX 19.1 NMEA CONNECTOR 19.1.1 PIN-OUT Type of connector: SUB-D9 Female The pin-out of the connector is described in the following table: 1 NC 6 NMEA_RS485_A 2 NMEA_OUT 7 NMEA_RS485_B 3 NMEA_IN 8 OTHER_RS485_A 4 GND 9 OTHER_RS485_B 5 GND...
  • Page 103 EPSILON CLOCK MODEL EC20S Spectracom The inputs/outputs of the SUB-D connector are defined in the following table: Not Connected Ground NMEA_IN Receive line input of the NMEA message. RS232 compatible level NMEA_OUT Transmit line output of the NMEA message. RS232 compatible level NMEA_RS485_A Transmit line output of the NMEA message.
  • Page 104 EPSILON CLOCK MODEL EC20S Spectracom 19.1.2 NMEA MESSAGE INPUT Connector: connector SUB-D9 Input signal characteristic required: Data and port parameters : ASCII characters, 9600 bauds, 8 bits, 1 stop bit, no parity. Protocol : <Message> <CR> <LF> Format : $GPRMC,hhmmss.ss,S,llll.ll,a,yyyyy.yy,a,x.x,x.x,ddmmyy,x.x,a*hh o RMC = Recommended Minimum Specific GNSS/TRANSIT Data o hhmmss.ss =...
  • Page 105 EPSILON CLOCK MODEL EC20S Spectracom 19.1.3 NMEA MESSAGE OUTPUT Data and port parameters: ASCII, 9600 bps, 8 bits, 1 stop bit, no parity. Protocol: <Message> <CR> <LF> Format: $GPRMC,hhmmss.ss,S,llll.ll,a,yyyyy.yy,a,x.x,x.x,ddmmyy,x.x,a*hh o RMC = Recommended Minimum Specific GNSS/TRANSIT Data o hhmmss.ss = UTC of position fix o S = status of the EPSILON CLOCK MODEL EC20S (A = OK, V=warning) IF the datation source is not valid THEN S=’V’...
  • Page 106 EPSILON CLOCK MODEL EC20S Spectracom 19.2 ALARM & RS232 SERIAL PORT CONNECTOR Type of Connector: SUB-D9 Female The pin-out of the connector is described in the following table: RL_URG_C RL_URG_T CTRL OUT RL_URG_R CTRL IN RL_NON-URG_R RL_NON-URG_C RL_NON-URG_T User’s Manual...
  • Page 107 EPSILON CLOCK MODEL EC20S Spectracom The inputs/outputs of the SUB-D connector are defined in the following table: Ground CTRL IN & OUT Can be used to connect a Serial Terminal port to manage Network configuration without Network RJ45 port. RL_URG_C Urgent Alarm –...
  • Page 108 EPSILON CLOCK MODEL EC20S Spectracom 19.3 DC CONNECTOR Type of Connector : XLR Male Use a XLR Female connector to supply the product. 1 Positive Pin 2 Negative Pin 3 GROUND This DC input is isolated, so a positive or negative power supply can be used. Positive Case Negative Case Pin 1...
  • Page 109 EPSILON CLOCK MODEL EC20S Spectracom REVISION HISTORY Revision Level Date Description 08/10/08 First Release 09/12/08 Web Page Updated 09/09/09 Mute Mode, Events logging, Configuration Save added Rev1 07/01/13 NTP and DC Connector Rev2 12/02/14 Multi-GNSS source Rev3 25/09/14 Information of the type of embedded oscillator + NTP Stratum Management Rev4 06/03/2015...
  • Page 110 EPSILON CLOCK MODEL EC20S Spectracom OROLIA Contacts for Spectracom products SPECTRACOM USA SPECTRACOM FRANCE 1565 Jefferson Road Parc Technopolis - Bat. Sigma Suite 460 3, Avenue du Canada Rochester, NY 14623 91974 Les Ulis Cedex Lat: 43.084300 Long: -77.585600 Lat: 48.687900 Long: 2.191870...

Table of Contents