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Clepsydra NTS-3000 User Manual

Ntp/ptpv2 network time servers
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U
M
SER
ANUAL
NTP/PTPv2 Network Time Servers
NTS-3000
NTS-4000
NTS-5000
Updated: 17-Jul-15
1

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Summary of Contents for Clepsydra NTS-3000

  • Page 1 ANUAL NTP/PTPv2 Network Time Servers NTS-3000 NTS-4000 NTS-5000 Updated: 17-Jul-15...

  • Page 2: Table Of Contents

    SAFETY INSTUCTIONS TRADEMARKS, ACKNOWLEGMENT & CONTACTS GLOSSARY TIME TERMS QUICK START PRODUCT INTRODUCTION STANDARD SERVER HARDWARE EXTRA OPTIONS. EXTENDED MODULES. MULTISOURCE. NEW CONCEPT OF TIME SOURCE TARGET UTC. THE TRUE OUTPUT TIME MOUNTING GPS ANTENNA POWERING UP NTS BASIC DEVICE CONFIGURATION ERROR MESSAGES NTP –...

  • Page 3: Safety Instuctions

    SAFETY INSTUCTIONS ATTANTION! These are the important Safety Instructions that should be followed during installation and maintenance of the Elproma NTS-3000/4000/5000 timeserver family product. IMPORTANT NOTE This equipment contains hazardous AC and DC voltages. Do not handle any metallic part until the power has been disconnected. Do not assemble, disassemble set when the power is ON.

  • Page 4: Glossary Time Terms

    GLOSSARY TIME TERMS In alphabetic order: Accuracy - The degree of conformity of a measured or calculated value to its definition or with respect to a standard reference time. In the meaning of NTP (Network Time Protocol) the accuracy determines how close the PC clock is to UTC reference (GNSS or external atomic clock).
  • Page 5 hyperfine levels of the ground state of the cesium - 133 atom. Synchronization - The process of measuring the difference in time of two time scales such as the output signals generated by two clocks. In the context of timing, synchronization means to bring two clocks or data streams into phase so that their difference is 0 (see time scales in synchronism).

  • Page 6: Quick Start

    1. Quick Start Switch ON power and following screen sequence will appear on 2x20 front panel green color LCD: © 1992-2014 CLEPSYDRA Boot loader V7.05.29 TIME SYSTEMS Loading When booting the following message will be displayed (depends on server model...
  • Page 7 [OK] - Yes [Cancel] - No and your NTS-3000/4000/5000 timeserver is ready to communicate via LAN1/LAN2 interface. Unless you wish to provide more advance settings above configuration fine to start working now. If the GNSS (GPS/Glonass/Galileo) Multi-SAT receiver remains asynchronous the following information will be displayed on LCD indicating a part of process called –...
  • Page 8 display:...

  • Page 9: Product Introduction

    TELNET, SSH, SNMP. There is more software utility available FREE to download from www.clepsydratime.com: ClepsydraNTPmonitor, ClepsydraNTPconfig, ClepsydraNTPclock etc. All Clepsydra Time Servers can operate in standard or special NTP authentication mode protected by MD5 algorithms and PKI infrastructure. Unit supports broadcast, manycast, multicast and client/server modes of NTP.

  • Page 10: Standard Server Hardware

    There is LAN2 connector located on the front panel too. It contains 2x LEDs: green - indicates cable connection, yellow - flashes while data is being transmitted. Standard Front Panel The back panel of NTS-3000/4000/5000 (standard version) is organized on way there are several I/O referential time sections. : Standard Back Panel...
  • Page 11 LAN1 RJ-45 TCP/IP Local Area Network (back panel) LAN2 RJ-45 TCP/IP Local Area Network (front panel) RS-232 DSUB9 RS-232 For technical and service purpose KUSB For technical and service purpose NTS-3000 (standard) Back Panel picture NTS-3000 (standard) Front Panel picture...
  • Page 12 NTS-4000 OCXO (Standard Version) NTS-4000 OCXO (Standard Version) 1U rack’19 mount Front Panel NTS-4000 OCXO (Standard Version) Back Pane Table describe connectors it’s availability and related into it functions: Name Connector Standard Purpose Availability Antenna (A) RJ-45 RS-485 Antenna connector (main antenna) Antenna (B) RJ-45 RS-485...
  • Page 13 NTS-5000 Rubidium+OCXO (Standard Version) NTS-5000 RUBIDIUM+OCXO (Standard Version) 2U rack’19 mount Front Panel NTS-5000 RUBIDIUM+OCXO (Standard Version) 2U rack’19 mount Back Panel Table describe connectors it’s availability and related into it functions: Name Connector Standard Purpose Availability Antenna (A) RJ-45 RS-485 Antenna connector (main antenna) Antenna (B)

  • Page 14: Extra Options. Extended Modules

    Direct Cesium 5071A (Custom) Time Server Custom NTS-3000 with special direct cesium 5071A interface (1PPS+RS232) Dial-Up GSM/PSTN/ISDN Time Server Custom NTS-3000 Dial-Up with built-in GSM & PSTN (or ISDN) modem 6xLAN (NTP) Time Server Custom NTS-3000 with 6x LAN (NTP) interfaces /also available as NTS-4000/...
  • Page 15 IEEE1588/PTPv2 Master Clock NTS-4000OCXO PTPv2 Master Clock (IEEE1588 Server on LAN5) NTS-5000 Rb+OCXO PTPv2 Grand Master Clock (IEEE1588 Server on LAN5) IEEE15888/PTPv2 Slave Clock with E1/T1 outputs NTS-4000OCXO PTPv2 Slave Clock (IEEE1588 Client on LAN4) with T1/E1 outputs NTS-5000Rb+OCXO PTPv2 Slave Clock (IEEE1588 Client on LAN4) with T1/E1 outputs IEEE15888/PTPv2 Grand Master Clock with E1/T1 (SSU) in/out NTS-4000OCXO Grand Master PTPv2 Clock (LAN4 PTP-client LAN-5-PTP-server) with T1/E1 in/out NTS-5000Rb+OCXO Grand Master PTPv2 Clock (LAN4 PTP-client LAN-5-PTP-server) with T1/E1 in/out...

  • Page 16: Multisource. New Concept Of Time Source

    5. Multisource. New concept of Time Source A true novelty of NTS-3000/4000/5000 is real multi source time concept. Product can take simultaneously a reference time from its all available hardware inputs. Compering to other existing solutions, it does not take “best” or “selected” source, but it is automatically and continuously computing weighted average UTC output out of all available sources (clocks) including groups: ...

  • Page 17: Target Utc. The True Output Time

    Using local atomic clocks let produce high accuracy and stable UTC output for NTP/PTP. Single source configuration of NTS-3000 connected to Cesium Primary Reference Std. 5071A Clock To allow output UTC (clock) quickly achieve high accuracy, yet avoid overshooting the time with large time adjustments, timeserver uses large adjustments (after power-up) occur quickly and small adjustments occur over time for normal mode of operation.
  • Page 18 Computing target output UTC time from multisource NTS-3000/4000/5000. Step adjustment is possible after Power-ON only. For multisource the synchronization and output UTC is much more complicated. Several steps are involved by NTS-3000/4000/5000 in determining the correct time on server’s inputs. Although some of these steps are not necessary when synchronizing to a single source (i.e.
  • Page 19 would be the result of incorrectly set clocks, it is possible (but very unlikely) that a Falseticker may have a incorrectly set clock as the result of time manipulation (i.e. GPS spoofing). These kind of tricky things are similar acting to “time machine”. Spoofing GPS is one of most popular, but unfortunately not the only one.
  • Page 20 7. Time scales. UTC & LEAP second The basic supported time scale is UTC. Universal Coordinated Time is the primary time standard by which the world regulates clocks and time. It is one of several closely related successors to Greenwich Mean Time (GMT) set according to astronomic observations.
  • Page 21 GPS L1/L2, SBAS, EGNOS, WAAS, GLONASS, and tomorrow from GELILEO too. There are 2 LED (red, green) on the back panel of NTS-3000 to indicate GPS, OCXO 1PPS synchronization. The following unit status is reported on LED's:...

  • Page 22: Mounting Gps Antenna

    8. Mounting GPS antenna The GPS satellite time receiver has been designed to provide extremely precise time. High precision available 24 hours a day around the whole world. The Global Positioning System (GPS) is a satellite-based radio-positioning, navigation, and time- transfer system.
  • Page 23 The hardware of the GPS antenna contains in one box. In a box are placed GPS receiver, frequency converter and basic over-voltage protection. Box is water resistant (IP67) therefore it should stay over water level during rain. Figure 7: NTS GPS antenna box – interior Figure 6: NTS GPS antenna box The metal handler should be mounted on top of building.
  • Page 24 For connecting antenna (GPS or DPS + DCF77) box we recommend usage of UTP or STP CAT5 cables (for external environment. use) with standard RJ-45 connector termination (both sides) with standard T568B conductors assignment. Cable should be leaded into antenna box through cable gland. Please use standard Ethernet cramping tooling (not included to NTS set) to mount antenna cable connection.

  • Page 25: Powering Up Nts

    9. Powering up NTS If both the antenna (GPS, DCF77 or GPS+DCF77) and the power supply have been connected the system is ready to operate. You can turn on a power switch located on the back panel of NTS server. Typically, time duration of NTS server power-up is enough for the antenna (GPS) box receiver to start to operate with the required accuracy.

  • Page 26: Basic Device Configuration

    10. Basic device configuration After first power up, at least basic configuration should be performed in order to setup proper interfaces IP configuration. This can be done using front panel keyboard. Figure 8: NTS–5000 Front panel Keyboard To enter setup mode press and hold “OK” button. Now you can configure LAN1 interface.

  • Page 28: Error Messages

    11. Error messages If no antennas are currently connected to NTS devices following error screen will be shown 17-02-2006 Err sats 18:02:21 ANT ERROR Error: all antennas disconnected The NTS servers require minimum 5 satellites to be reached continuously in order to get time from GPS properly.

  • Page 29: Ntp - Network Time Protocol

    12. NTP – Network Time Protocol NTP is a common method for time synchronization over networks. The NTP is much different from any of known other communication protocols. It is because NTP does not base on the principles of synchronizing machines to each other. It is based on the principles of having all machines get as close as possible to the UTC time provided by NTS servers.
  • Page 30 Figure 9: Time Adjustments Using Stepping and Slewing Due to NTP specification NTS server is visible over network as a peer. Single peer can contain more than single timeservers in order of a hierarchy called stratum. The top of the stratum tree is preserved for radio-controlled timeservers such as NTS server.
  • Page 31 The NTS-5000 has three additional sources: Internal Time Patterns #STRATA 1x IRIG-B signal (external connector) STRATUM-0 1x OCXO (1PPS) internal quartz oscillator for GPS failure STRATUM-0 1x Rubidium (1PPS) internal atomic clock for GPS failure STRATUM-0 * - special feature option (required to be purchased separately) A high precision synchronization is chosen by NTP automatically.

  • Page 32: Ntp On Time Failure Tolerance Network

    13. NTP on Time Failure Tolerance Network Multiple time source system of NTS – 4000 already improves safety because it protects situation when a single source could fail. But it is also possible to use several NTS – 4000 units simultaneously to improve stability of the time synchronization.
  • Page 33 One NTS time server can be used as a support for another NTS server, delivering time into a secured LAN isolated from the Internet. This solution requires 2x NTS servers working together. In the latter instance, first NTS works as an antenna emulator (STRATUM-0) for another NTS, enabling safe time synchronization (no TCP IP communication) between.

  • Page 34: Nts Software Setup

    14. NTS software Setup For the very first time of installation the NTS–5000 has to be configured by resetting to defaults values. Please press and hold simultaneously “OK” and “C” buttons on front panel keyboard. The settings will be displayed on front panel LCD. You will have to configure one of your local computer (in example laptop) to IP number and MASK which is suitable to connect to the unit or setup basic IP configuration as described in “Powering NTS”...
  • Page 35 Figure 13: Entering IP address Figure 14: Entering MASK address...
  • Page 36 Figure 15: Entering DEFAULT GATEWAY address Figure 16: Entering IPv6 address...
  • Page 37 In addition you can specify what mode you want to work NTS–5000 on specific LAN interface. You can enable extra broadcast and multicast modes running in the background of standard client/server mode, but we suggest to finish basic configuration first before you go to more advanced options. Therefore please leave those options for the moment now by simply filling fields 0.
  • Page 38 Now you should repeat listed above steps for LAN2. You can also specify SYSLOG server for future tracing functionality. You can configure facility and verbosity of NTS server messages, to ease log segregation on your syslog server. Please read your syslog documentation –...
  • Page 39 If your network support SNMP, you can configure special MIB2 traps to implement exceptional facts you can be interesting in. It is very easy to set traps on such way that you will be informed by mail or mobile phone (SMS) on any unexpected situation may occur inside NTS server like e.g.
  • Page 40 Another step is you can define up to 3 NTP backup servers for single NTS server unit. In this mode NTS server reminds Stratum 1 as long as GPS antenna works fine or any other time source (PPS_IN, Rubidium, OCXO). But in case of missing accurate time source NTS server checks backup servers list.
  • Page 41 NTS server can work with no GPS, PPS_IN nor IRIG-B source of time. It can even operate with no backup NTP servers, just based on internal OCXO (when previously synchronized) or RTC time source. For that reason you need to be able to set up manually UTC date and time. However you don't have to do it because once GPS (IRIG-B or DCF) signal is starting to be receive that automatic RTC and OCXO synchronization is proceeded.
  • Page 42 NTS server is ready to work in NTP authentication modes. This is valid for all modes of synchronization including: • broadcast, • multicast, • client/server and NTP backup communication. This screen helps you generate SSL and SSH keys. You can also edit MD5 keys, but generation is not supported by NTS server.
  • Page 43 Figure 23: Other functions Upgrade. To perform firmware upgrade you should put USB memory stick with new firmware into port on front panel and then activate this option. GPS. With this function you can monitor GPS receiver messages on line, just as they came.

  • Page 44: Security And Ntp Authentication Mode

    15. Security and NTP authentication mode The notion of accurate time is essential to determining the order in which events occur. This is a fundamental aspect of transactional integrity, system and network- wide logging and auditing, and troubleshooting and forensics. Having an accurate time source plays a critical role in trading and debugging problems that occur on different platforms across a network.
  • Page 45 Figure 24: Broadcast NTP mode You can enter and view NTS server MD5 keys in AUTH menu. All entered keys are considered to be trusted for time service needs, but there is default nopeer nomodify restriction in NTS server access control list. You have to put the same keys at the same positions to file (/etc/ntp.keys) on client side.
  • Page 46 You can have many NTP clients accessing NTS server in broadcast and multicast modes. Please note, that in default client NTP setup these modes requre authenticated packets to work (unless you add disable auth line to your ntp.conf file). Make sure, that you choose appropriate broadcast and multicast address. Please refer to original ntp documentation for further details about authenticated modes, and planing subnet synchronization using broadcast and multicast.
  • Page 47 16. NTPq client diagnostic utility Any NTP implementation supports special diagnostic client ntpq. The command ntpq requests the actual status of NTS server. An command interpreter appears. Type "?" for a list of all available commands Figure 26: NTPq diagnostic for Windows NT/2000/XP The command peers is used to list all active reference clocks: with the following meaning: •...
  • Page 48 After while stratum hierarchy can change (it does not mean it has to) selecting new source for NTP. Than peer looks like: Repeatedly a "peer" command lets the user observe the accuracy of the NTP daemon. Every 16 seconds (value of -poll) a new time string is read in from the radio clock.
  • Page 49 17. Installing NTP client software NTP became to be a world wide standard in network time synchronization. Almost etery existing operating system has its own implementation of NTP including Microsoft Windows and Cisco products. Many systems includes NTP clients to standard distribution.
  • Page 50 17.1. Windows 95/98/Me (SNTP client) Simply copy all CD:\Win9598Me directory to your hard disk. Add your local NTS server IP address to list of available timeservers by selecting Add button. You should select SMTP protocol to be active. We also advice to keep adjustment once per minute with maximum time corrections as possible.
  • Page 51 17.2. Windows NT/2K/XP/2003/Vista (NTP Client) Before you start be sure you are operating as system administrator. Figure 28: NTP client setup - first IP address for local clock Run CD:\WinNT2KXP\setup.exe and follow instructions on screen. During installation you will be asked for 2 IP addresses. The first address you should type is always 27.127.1.0.
  • Page 52 17.3. UNIX family systems Most of modern Unix systems have NTP included in distribution. Please note, that xntpd is NTP version 3 daemon. Therefore the NTP daemon can be compiled on the target system at any time. There is NTP distribution included on cd:\drivers\ntp\unix.
  • Page 53 The NTP daemon is started with ntpd or, using rc.local, while booting the system. If you want to start NTP without downtime, consider using “ -g -x ” options, to force slewing time and ignore sanity 1000s offset check. /var/log/ Status messages during...
  • Page 54 18. Technical specification The NTS – 5000 is high quality professional time server for computing, telecom, military and other science purposes. It has been manufactured with no mechanical parts as coolers or hard disk. All cooling system has been resolved on natural air circulation outgoing via metal case of unit.
  • Page 55 EN61000-4-5 level 2; DSUB9 connector; RS-232C; TIMER_IN DSUB9 connector; RS-232C; pin1: 1PPS out (TTL) 0..5V TIMER_OUT RS232 DSUB9 connector; RS-232C; (front panel) 18.3. CASE Metal desktop case, 2U; Front panel: 43x483mm HAUSING rating IP20 PROTECTION 483x43x286 mm DIMENSIONS 2 x 20 characters 18.4.
  • Page 56 18.7. OTHER 0...50 oC TEMPERATURE STORAGE -20...70 oC 85% max HUMIDITY MTBF > 3 million hours (at 24C) During development of the NTS server we have performed a reliability prediction that was performed using the "Part Stress Analysis" method. This resulted in a theoretical predicted MTBF of 284608 hours.

  • Page 57: On-Line Support

    19. On-line support Elproma provides a range on on-line support which includes: the latest version of this document • information about newest updates for GPSeye • technical support • Information about this and other products can be found on our website www.m2mgsm.com in tab Products →...

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