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TimeTools tServe 5000 Installation Manual

1. representations about the suitability this software for any m purpose It is provided as is without express or implied is warranty KKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKK GNU Public Licence GNU GENERAL PUBLIC LICENSE Version 2 June 1991 Copyright C 1989 1991 Free Software Foundation Inc 51 Franklin St Fifth Floor Boston MA 02110 1301 Everyone is permitted to copy and distribute verbatim copies of this license document but changing it is not allowed Preamble The licenses for most software are designed to take away your freedom to share and change it By contrast the GNU General Public License is intended to guarantee your freedom to share and change free software to make sure the software is free for all its users This General Public License applies to most of the Free Software Foundation s software and to any other program whose authors commit to Using its Some other Free Software Foundation software is covered by the GNU Library General Public License instead You can apply it to your programs too When we speak of free software we are referring to freedom not price Our General Public Licenses are designed to make sure that you have the freedom to distribute copies of free software and charge for this service if you wish that you receive source code or can get it if you want it that you can change the software or use pieces of it in new free programs and
2. 2 3e107 Optional Buffered 1 PPS Output on BNC 48 1 8 _ _ ee AAA Reporting a Remote Syslog O _ Q System Legging o ooo Logging O 0 Q SPECIFICATION MECHANICAL ENVIRONMENTAL INPUT OUTPUT Dimensions 168 x 165 x 54 mm 6 5 x 6 5 x 2 2 e LAN 10 100 Mbit BaseT RJ45 auto sensing e Construction 1 8mm Aluminium e Serial Console 9 way D RS232 9600 N 8 1 Weight approx 0 8Kg 1 8lbs e GPS Antenna Input TNC female e Power Supply Universal 85 264 VAC 47 440 Hz CE UL CSA LF AUX Input 9 way D Approved PSU Power Double Fused IEC Inlet e Power Consumption approx 5W e PPS Buffered pulse per second output on BNC Operating Temperature OC 70C optional e Storage Temperature 20C 85C e Relative Humidity 95 non condensing INTEGRAL GPS RECEIVER e Approvals CE EN61000 6 1 EN61000 6 3 FCC e Type 12 Channel L1 1575 42 MHz e Features High sensitivity Over determined clock modes e Timing GPS Time Traceable to UTC USNO Accuracy typical 60 nsec UTC e Aquistion Cold Start 38 sec 2008 TimeTools Limited All right reserved Page 43 www TimeTools co uk TimeTools SR SC Series Network Time Protocol Server Installation Guide GPS and LF Antenna Options and Accessories Indoor Unit MXS DXS Ultra High Gain Radio Antenna LF GPS Over Optical Fibre A LF GPS over fibre system allows RF rad
3. Enter help for a list of built in commands tmp admin setclock 081214222010 set the devices system time UTC Thu Aug 12 14 22 00 UTC 2010 tmp admin exit exit the telnet session Connection to host lost C gt The setclock command has the following syntax setclock mmddHHMMyyyy where mm is the month of the year 2 digits range 1 12 dd is the day of the month 2 digits range 1 31 HH is the hour of the day 2 digits range O 23 MM is the minute of the hour 2 digits range O 60 yyyy is the current year 4 digits range 1000 9999 2008 TimeTools Limited All right reserved Page 36 www TimeTools co uk TimeTools SR SC Series Network Time Protocol Server Installation Guide SR Series System Logs System Log File Location tmp admin messages View using cat tmp admin messages from console or use FTP or Web interface Dec 28 11 12 13 none syslog info syslogd started BusyBox v1 00 2005 06 29 14 57 0000 Dec 28 11 12 13 none daemon info inetd 76 Online and ready 2 sockets Dec 28 11 12 14 none daemon info LCD 84 Starting LCD display handler daemon LCD Handler 1 1 000 Dec 28 11 12 14 none daemon notice ntpd 89 ntpd 4 2 081 1161 r Sun Dec 11 15 28 12 GMT 2005 3 Dec 28 11 12 14 none daemon debug ntpd 9S9 signal no reset signal 13 had flags 4000000 Dec 28 11 12 14 none daemon info ntpd 89 precision 2 000 usec Dec 28 11 12 14 none daemon info ntpd 8
4. OC 70C SC Series Universal 100 240 VAC 50 60 Hz CE UL CSA Approved PSU SW approx 18 Btu Hr GPS Receiver Specification SRxxxx 10 and SCxxxx 10 models Accuracy 24 hr static Horizontal SBAS Altitude SBAS Velocity Static PPs PPS Stationary Mode indoor 145dBm Acquisition Autonomous 130dBm 50 Reacquisition Hot Start Warm Start Cold Start Sensitivity unaided Tracking Acquisition Receiver Dynamics GPS Antenna Connector 2008 TimeTools Limited All right reserved www TimeTools co uk 2 5 m 50 5 m 90 2 0 m 50 4 m 90 5 m 50 8 m 90 3 m 50 5 m 90 0 06 m sec 60ns RMS 350ns 2s 35s 38S 160 dBm 148 dBm 26 TNC Female Page 38 TimeTools SR SC Series Network Time Protocol Server Installation Guide Appendix B DATASHEET SR SERIES KEY FEATURES Linux based true Stratum 1 NTP time servers Industry leading 5 year warranty 12 channel GPS MSF DCF 77 and dual reference clock options Rugged compact 1U high rack mountable enclosure Very low power consumption aiding reliability High stability TCXO options for extended holdover Secure easy to use HTPPS SSL SSH configuration BENEFITS Synchronize thousands of network time clients Accurately synchronize time critical processes Accurate traceable time reference inside your firewall Reliable timing information derived from atomic time Simple to in
5. The MLS DLS LF antenna is a unidirectional active ferrite antenna The antenna should be installed in a horizontal plane at right angles to the source of the radio transmission The antenna incorporates a red green LED which flashes in tune to the LF radio transmission Ideally the antenna needs to be located where a consistent red green flash can be observed once per second If the antenna LED flashes erratically or if the LED is completely red or green the antenna may need to be relocated The antenna can be located up to 100m from the time server using CAT3 or better patch lead or structured cabling 2 Fig MLS DLS LF Radio Antenna Dimensions Length 76mm Width 35mm Height 20mm Weight 180g Connector 9 way D female Cable length 2m Maximum Cable Length 100m CAT3 or better serial extension cable MXS DXS Antenna Installation The MXS DXS LF antenna is a unidirectional high gain active ferrite antenna ideal for low signal strength areas The antenna should be installed in a horizontal plane at right angles to the source of the radio transmission The antenna incorporates a red green LED which flashes in tune to the LF radio transmission Ideally the antenna needs to be located where a consistent red green flash can be observed once per second If the antenna LED flashes erratically or if the LED is completely red or green the antenna may need to be relocated The antenna is provided with 5m of cable which can be ext
6. TimeTools SR SC Series Network Time Protocol Server Installation Guide Configuration Menu Time Tools NIP s5000 Series Network Time Server Internet Explorer Provided By Sky Broadband Go y http 192 168 0 33 t3 cai 9 42 x coo File Edit View Favorites Tools Help Links 2 Customize Links Free Hotmail j Windows W Windows Marketplace Windows Media Google Ii v The device obtains accure Go e E TF Bookmarks PageRank S 0 blocked T Check y y Autolink e YE AutoFill ep Sendtov 4 gt w k esf Settinas deb Page Ol Tools M a a d NTP Server and SNTP Time 5 lo TimeTools NTP s5000 Seri X TimeTools SR Series NTP Network Time Server TimeTools A NTP Server Specification Model NTP Version TimeTools SR Series NTP Time Server NTP 4 2 0 Firmware Build Rev 1 0 001 17 Oct 2008 Network Configuration Settings Host Name NTP001 IP Address 192 168 0 33 Domain Network Time Protocol Status NTP Status Clock Synchronised NTP Estimated Error 0 877 msec NTP Maximum Error 34 635 msec GPS Synchronisation Status GPS Status LOCK GPS Satellites Used 7 GPS Position 52 32 83186N 0 207 52122W 218m GPS Last Sync 17 01 59 10 11 2008 UTC LF Radio Synchronisation Status LF Signal Status No Signal LF Last Sync Init Copyright 2002 2008 TimeTools Limited TimeTools Limited Web ww w TimeTools co uk 91 High Park
7. C Toos TimeTools SR Series NTP Network Time Server TimeTools Edit Security Configuration New Password Copyright 2002 2008 TimeTools Limited TimeTools Limited Web www TimeTools co uk All Rights Reserved 91 High Park Crescent Email info TimeTools co uk Dudley DY3 10S Tel 44 0 1902 673551 United Kingdom Fax 44 0 870 123 1844 Change Password Change admin password for console and telnet connection A separate password exists for http web interface sessions The http web interface password can only be changed from the web interface 2008 TimeTools Limited All right reserved Page 21 www TimeTools co uk TimeTools SR SC Series Network Time Protocol Server Installation Guide NTP Configuration Menu Time Tools NIP s5000 Series Network Time Server Internet Explorer Provided By Sky Broadband Go e http 192 168 0 33 t3 cgi 414911 Google IE File Edit View Favorites Tools Help Links 2 Customize Links Free Hotmail E Windows 2 Windows Marketplace Windows Media Google Gr the device obtains accuri Y Goo 5 ER v vy Bookmarksw PageRank q So blocked Y Check y X Autolink AutoFill ep Sendtov 4 gt Q Settings w e E a w e 88 NTP Server and SNTP Time S Ci TimeTools NTP s5000 Seri X fp El d Page Of Tools TimeTools SR Series NTP Network Time Server NTP Configuration Menu Ex
8. Clock Synchronised HIP Estimated Error 4 826 msec HIF Maximum Error 20 270 msec GPS Status LOCK GPS Position 52 32 83184N 8 267 52120 218m GPS Satellites F Used L Visible LF Signal Status No Signal LF Last Sync Init Lil Metwork 2 Security 3 NTP 4 Local Lx Exit Selection The configuration menu provides network NTP and reference clock status information Network Configuration Menu B ERE TimeTools SR Series HIP Network Time Server Configuration Menu Model 5R9 975607SR285075C9705 Build Rev 1 6 664b 12 May 2618 HIP U amp ersion WIP 4 2 0 HTPHH1 IP Address 192 168 69 12 MTP Status Glock Sunchronised HIP Estimated Error 6 244 msec HTP Maximum Error 17 812 msec GPS Status LOCK GPS Position 52 32 83181H 2 7 52096W Z2im GPS Satellites Used LF Signal Status 168 LF Last Sync HS5F H 9 46 H8B 26 65 2610 UTC Lil Network 2 Security 3 WIP 4 Local 2 Exit Selection The network configuration menu displays the time server network configuration and allows settings to be modified In order for any network changes to take effect the time server should be rebooted r imeTools SR SC Series Network Time Protocol Server Installation Guide Security Configuration Menu B HEE t5erue NTP6 Time Server Security Configuration Menu Lil Change Password A Exit Selection Change Password Change admin password for console and telnet connecti
9. Crescent Email infofMTimeTools co uk Dudley DY3 10S Tel 44 0 1902 673551 ited Kinado ax 44 0 8 0 od All Rights Reserved AH 4 ftus Waiting for http 192 168 0 39 3 cgl Model Build NTP Version Hostname Domain IP Address NTP Status NTP Estimated Error NTP Maximum Error GPS Status GPS Postion GPS Satellites LF Signal Status 2008 TimeTools Limited All right reserved www TimeTools co uk T8 LIT IT TN ea NTP Server model Describes the firmware build revision number and firmware build date Network Time Protocol version number currently installed Hostname of time server Network domain name Network IP address of time server Clock Synchronised Clock Not Synchronised Estimated kernel time error Maximum kernel time error Lock GPS satellite lock has been achieved and receiver operation OK No Lock GPS satellite lock not acheived or lost This may be due to poor antenna location No Comm Indicates no communication with GPS receiver probable receiver fault GPS positioning information location and height Satellites used in last timing calculation and visible satellites MSF Y DCF 77 radio antenna if fitted signal strength indicator 0 100 For good signal reception and decoding a consistant 100 signal strength is required of an extended period of Page 18 Qio TimeTools SR SC Series Network Time Protocol Server Installation Guide
10. GPS status GPS NoLock 0 indicates that no GPS satellite lock has yet been achieved LF radio status LF Nsig lnit indicates that no LF radio signal is currently being received UTC 09 40 27 Tue 11 Nov 2008 Os 1608 yoo MATE GPS NoLock 0 LE Ns1ig Int When a GPS or radio antenna is installed and a signal lock is achieved time stamps will be passed to NTP from the reference clock NTP will then enter a calibration mode for a period of 10 to 15 minutes while its internal clock is being skewed towards the correct time During this period the unit will still be in an unsynchronised state and will display NO SYNC as indicated below UTC 09 40 27 Tue 11 Nov 2008 Os l6us D ug sr DISSE Lock Berri C Tq LCD Display Normal Operation When the device is synchronised the LCD display will typically appear as follows UTC 09 40 27 Tue 11 Nov 2008 Ost p sdme ayno oR GPS Lock 8 Lesbo 09 40 UTC The current synchronised time maintained by the device This is displayed as UTC time Coordinated Universal Time Os The current offset or estimated error between the maintained time and the external reference clock This may vary according to the external reference clock that is currently being used and also with the SR series model Sync OK Denotes that the device is synchronised and can serve network time clients with the correct time 2008 TimeTools Limited All right reserved Page 34 www TimeTools co uk TimeTo
11. The time server can be configured remotely using a telnet session configured for VT100 emulation From a host computer type telnet t VELO xXX XXX XXX XXX where xxx xxx xxx xxx is the IP address of the time server On successful connection the login prompt will appear Secure Telnet Session SSH via Remote Host The time server can be configured remotely using a secure telnet session SSH if enabled configured for VT100 emulation SR9xxx and SC9xxx models only Logging On The default username and password is admin Linux 2 4 31 NTPOO1 0 NTPO01 login admin Password The console configuration menu can be entered by typing console at the prompt tmp admin Sconsole The console application provides an easy to use configuration and status tool that is similar in format to the web interface menus If the SR series detects no key presses over a period of 5 minutes then the console configuration menu will automatically exit 2008 TimeTools Limited All right reserved Page 27 www TimeTools co uk D Q Qe Q Ar i ne A Pa ty AS FSI Ly Ti a Ya D retro I Q AKrIAK metae ti rn S sun rl P a R SC Series Network Time Protocol Server Installation Guide Configuration Menu B HERE TimeTools ZR Series HIP Hetuork Time Server Configuration Menu Model TimeTools SK Series HIP Time 5 Build Rev 1 8 8681 1 7 0ct 2HH8 HIP Uersion WIP 4 2 8 Hostname WNTPARL Domain IP Address 192 168 6 33 NTP Status
12. TimeTools co uk TimeTools SR SC Series Network Time Protocol Server Installation Guide Web Interface The web interface can be initiated by entering the IP address of the time server into a web browser such as Internet Explorer eg http 192 168 0 4 The user will then be greeted by the login screen A secure web connection HTTPS can also be used if the HTTPS protocol is enabled SR9xxx SC9xxxx models only Time Tools NIP s5000 Series Network Time Server Internet Explorer Provided By Sky Broadband File Edit View Favorites Tools Help Links 4 amp Customize Links Free Hotmail Windows WB Windows Marketplace Windows Media Google Goo 69 EF YY Bookmarks Feet E o blocked Yr Check X Autolink E autoril s Sendtov Y O Settings w Je e 00 NTP server and SNTP Time S TimeTools NTP s5000 Seri X fm gt dh Ey Page gt tools TimeTools SR Series NTP Network Time Server TimeTools This is the login web page for TimeTools SR Series NTP Time Server Enter the password and select login to configure the time server and view statistics Password o Copyright 2002 2008 TimeTools Limited TimeTools Limited E www TimeToo s co uk All Rights Reserved 91 High Park Crescent E info TimeTools co uk Dudley DY3 10S 44 0 1902 673551 United Kingdom 44 0 870 123 1844 Done D Internet Q100 2008 TimeTools Limited All right reserved Page 17 www TimeTools co uk
13. UK Typical equipment repair or replacement time is seven 7 business days plus shipping times One way shipping is the Customer s responsibility TimeTools will return ship the equipment by the same means it was received TimeTools will not be responsible for dismounting and remounting of the NTP server for unauthorized returns or for returns that do not list the RMA number and quantity returned on a packing list attached in plain view on the outside of the shipping container 2008 TimeTools Limited All right reserved Page 54 www TimeTools co uk
14. and Performance High stability disciplined TCXO oscillator options are available to maintain accurate time for extended periods in the event of GPS radio reference clock signal loss Secure Configuration and Maintenance An easy to use password protected user interface HTTP HTTPS SSL SSH is provided for system configuration and management FTP can be utilised to download NTP statistics and upload firmware upgrades provided by TimeTools free of charge 5 Year Warranty The SR Series NTP Server is a low power convection cooled device with no moving parts aiding long term reliability Our confidence in the reliability of the device is reflected in the provision of an industry leading 5 year warranty SR7110 The SR7110 is an entry level Linux based true NTP time server at a highly competitive price It can utilise GPS or LF radio time references to provide stratum 1 NTP functionality ideal for synchronising digital wall clocks and smaller networks SR9210 The mid range SR9210 provides a high specification NTP network time reference It incorporates a high throughput Ethernet network interface combined with the ability to accept GPS LF radio or dual reference GPS LF radio external time references The SR9210 is an ideal time reference where a large number of network time clients are to be synchronised accurately and reliably SR9750 SR9850 The top of range SR9750 and SR9850 has all of the advanced features of the SR9
15. assigned to NTP The IANA has assigned the multicast group address IPv4 224 0 1 1 and IPv6 ff05 101 site local exclusively to NTP but other nonconflicting addresses can be used to contain the messages within administrative boundaries Ordinarily this specification applies only to the local server operating as a sender for operation as a broadcast client Local System Clock Stratum The local system clock stratum specifies the stratum level of the local system clock that is used as backup in the event of primary reference clock loss or failure Setting the local system clock stratum to 16 default disables this feature Warning the local system clock is unsynchronised and is prone to drift It should therefore only be used if synchronisation of clients to the NTP server is required regardless of the accuracy of the NTP server s time 2008 TimeTools Limited All right reserved Page 22 www TimeTools co uk TimeTools SR SC Series Network Time Protocol Server Installation Guide Trusted Keys Specifies the key identifiers which are trusted for the purposes of authenticating peers with symmetric key cryptography as well as keys used by the ntpq and ntpdc programs The authentication procedures require that both the local and remote servers share the same key and key identifier for this purpose although different keys can be used with different servers The key arguments are 32 bit unsigned integers with values from 1 to 65 534 NTP K
16. be synchronised accurately and reliably SC9705 The top of range SC9705 has all of the advanced features of the SC9205 but also incorporates a high stability GPS LF disciplined Temperature Controlled Crystal Oscillator TCXO The high precision TCXO backup reference clock provides extended holdover periods in the event of primary reference signal loss AA 89 e gt gt LLL DA lud al TimeToots A ES O 2008 TimeTools Limited All right reserved wWww TimeTools co uk Page 42 TimeTools SRYSC Series Network Time Protocol Server Installation Guide Product Comparison Chart Model C7105 SC 9205 SC 9705 NTP v2 v3 v4 NTP Broadcast MEA RS232 Oui A A E E Time HN Sensing 1 12 Channel GPS Receiver High Sensitivity Indoor Over Determined Clock Single Satellite Operation LF DCF 77 German Reference Clock Dus GPS and LF Radio Reference Clack ea AA AA as GUOA54 JJ AAA Configuration Protocols A SSSSISI12 HTTP Web HTTPS SSL Secure Sockets Layer o 1 O la X SSH Secure Shell 0 0 1 X pj TELNET GGG Fa Oscillator Options Fesclisisr Sgen 3 O Standard Crystal Oscillator EE q jJ High Stability GPS LF Disciplined TCXO Oscillator Timing Typical GPS Accuracy 1 msec UTC 60 nsec UTC 60 nsec UTC
17. energy e Multi strike capability Technical Specifications Current 4Adc Insertion Loss lt 0 1dB Freq Range 800 2500MHz Mounting Bulkhead Flange Operating Voltage 6 Volts Polarity Protected Side Connector N Female 500 RF Power 0 25 Watts Surge Side Connector N Female 500 Throughput Energy lt 175yJ for 3kA 8 20us Waveform Turn On Voltage 7 Volts Unit Impedance 500 Voltage Standing Wave Ratio 1 1 1 Weatherised Bellcore TA NWT 000487 Procedure 4 11 Wind Driven 120 mph Rain Intrusion UL Approved and Listed UL497B 2008 TimeTools Limited All right reserved Page 47 www TimeTools co uk TimeTools SR SC Series Network Time Protocol Server Installation Guide Appendix G Copyright and Permission Notices Network Time Protocol NTP 4 2 KKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKK Copyright e David L Mills 19952 2005 Permission to use copy modify and distribute this software and j 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 ii notice appear in supporting documentation and that the name j University of Delaware not be used in advertising or publicity 8 pertaining to distribution of the software without specific e written prior permission The University of Delaware makes no
18. time NOSIG Indicates either no radio antenna detected antenna fault or complete lack of signal reception LF Last Sync Last Sync Shows the last successfully decoded time from the MSF DCF 77 if fitted radio antenna A radio time stamp is broadcast once every minute 2008 TimeTools Limited All right reserved Page 19 www TimeTools co uk TimeTools SR SC Series Network Time Protocol Server Installation Guide Network Configuration Menu Time fools SR Series Network Time Server Internet Explorer Provided By Sky Broadband Go P el http 192 168 0 12 t3 c01 Mj 4 x ES Google File Edit View Favorites Tools Help x Google d w Favorites B p Suggested Sites el Free Hotmail e Web Slice Gallery Jer P Check Translate AutoFill 4 amp O Sign In 2 Search Share S cor Lj Sidewiki zm gt TimeTools SR Series Network Time Server m LU Beh Page Safety Tools e TimeTools SR Series NTP Network Time Server TimeTools Network Configuration Menu Network Settings Host Name INTP001 Domain Name Name Server 1 192 168 0 1 Name Server 2 fo Syslog Server Network Services HTTP HTTPS O Telnet FTP v ssH Ethernet Configuration IP Address 192 168 0 12 Default Gateway 192 168 0 1 DHCP v Copyright 2008 TimeTools Limited TimeTools Limited Web www TimeTools co uk Al
19. 210 but also incorporates a high stability GPS LF disciplined Temperature Controlled Crystal Oscillator TCXO The high precision TCXO backup reference clock provides extended holdover periods in the event of primary reference signal loss 2008 TimeTools Limited All right reserved wWww TimeTools co uk Page 39 TimeTools SRYSC Series Network Time Protocol Server Installation Guide Product Comparison Chart Model EN SR71410 SR 9210 Timing Protocols NTP v2 v3 v4 NTP Peering ug NTP Multicast p 2200 NTP Broadcast NTP MDS Authentication A y y 200 NMEA RS232 Output Ga O EA AAA Time Reference Options Z o 12 Channel GPS Receiver High Sensitivity Indoor Over Determined Clock Single Satellite Operation LF MSF UK ReferenceClock 0 a 0 LF DCF 77 German Reference Clock Y ES Dual GPS and LF Radio Reference Clocks 0 Ga G a Ee NN Configuration Protocols CCSS HTTP Web HTTPS SSL Secure Sockets Layer a 0 SSH Secure Shel a O TELNET S G 08 y Y Console RS232 1 S QU Ga Q Y DHCP 1 O da A a E E S Oscillator Options ooo SCS Standard Crystal Oscillator 0 o J High Stability GPS LF Disciplined TCXO Oscillator Timing typical GPS Accuracy 1 msec UTC 60 nsec UTC 60 nsec UTC
20. 5 16 20 29 GPS Time Received 16 20 30 29 12 2005 UTC The first field records the time and date the reference clock time stamp was received followed by the received time stamp File Location Amp admin clocklog lf yyyymmdd where yyyymmdd is the current date View using cat tmp admin clocklog If yyyymmdad from console or use FTP Days Kept 1 day Description Records LF MSF DCF 77 reference clock statistics information Each update of the local clock outputs a line of the following form to the file generation set named clocklog 1f 29 12 2005 16 20 29 MSF Time Received 16 20 30 29 12 2005 UTC The first field records the time and date the reference clock time stamp was received followed by the received time stamp 2008 TimeTools Limited All right reserved Page 37 www TimeTools co uk TimeTools SR SC Series Network Time Protocol Server Installation Guide Appendix A Specifications Firmware Linux Version Supported Protocols Supported Secure Configuration Protocols Compatible Clients Hardware Ethernet Enclosure Construction Dimensions Weight Operating Temperature Power Supply Power Consumption typical Heat Output typical 2 4 31 NTP 4 2 0 SNTP TCP IP Telnet FTP HTTP RS232 Console HTTPS SSH SR9xxx SC9xxx models only NTP2 NTP3 NTP4 SNTP3 SNTP4 10 100 BaseT RJ45 Auto sensing 1U High 19 Rack mountable 1 8mm Aluminium 483 x 205 x 44 mm 2 2Kg OC 50C SR Series
21. 60 nsec UTC LF Accuracy 10 50 msec NTP Accuracy GPS Synchronised 10 msec UTC 24 Hour TCXO Holdover GPS disciplined typical 25C lt t 10 msec lt t 4 3 msec 2 3e107 1e10 Optional Buffered 1 PPS Output on BNC 1 Aa a 0 9 fe p oS Reporting Remote Syslog System Logging SPECIFICATION MECHANICAL ENVIRONMENTAL INPUT OUTPUT Dimensions 483 x 205 x 44 mm 19 0 x 8 05 x 1 73 LAN 10 100 Mbit BaseT RJ45 auto sensing e Construction 1U High 19 Rack mount 1 8mm Aluminium e Serial Console 9 way D RS232 9600 N 8 1 Weight approx 2 2Kg 4 84lbs e GPS Antenna Input TNC female e Power Supply Universal 85 264 VAC 47 440 Hz CE UL CSA LF AUX Input 9 way D Approved PSU Power Double Fused IEC Inlet e Power Consumption approx 5W e PPS Buffered pulse per second output on BNC e Operating Temperature OC 50C 0C 70C option optional e Storage Temperature 10C 60C 20C 80C option e Relative Humidity 95 non condensing INTEGRAL GPS RECEIVER Approvals CE EN61000 6 1 EN61000 6 3 FCC e Type 12 Channel L1 1575 42 MHz High Sensitivity e Features High sensitivity Over determined clock modes e Timing GPS Time Traceable to UTC USNO Accuracy typical 60 nsec UTC e Acquisition Cold Start 38 sec 2008 TimeTools Limited All right reserved Page 40 www TimeTools co uk TimeTools SR SC Series Network Time Protocol Server Installation Guide Jam Re
22. 9 kernel time sync status 0040 Dec 28 11 12 14 none daemon info ntpd 89 frequency initialized 8 PPM from tmp config ntp drift Dec 28 11 16 33 none daemon info ntpd 89 synchronized to SHM 0 stratum 0 Dec 28 11 16 33 none daemon notice ntpd 89 kernel time sync disabled 0041 Dec 28 11 17 39 none daemon notice ntpd 89 kernel time sync enabled 0001 NTP LoopStats File Location tmp admin loopstats View using cat tmp admin loopstats from console or use FTP or Web interface Days Kept 3 days stored as tmp admin loopstats yyyymmdd Description Records loop filter statistics information Each update of the local clock outputs a line of the following form to the file generation set named loopstats 50935 754402031 0000006019 Ls TTGX90 0020005517353 049013535906 The first two fields show the date Modified Julian Day and time seconds and fraction past UTC midnight The next five fields show time offset seconds frequency offset parts per million PPM RMS jitter seconds Allan deviation PPM and clock discipline time constant NTP ClockStats File Location tmp admin clocklog gps yyyymmdd where yyyymmdd is the current date View using cat tmp admin clocklog gps yyyymmdd from console or use FTP Days Kept 1 day Description Records GPS reference clock statistics information Each update of the local clock outputs a line of the following form to the file generation set named clocklog gps 29 12 200
23. Auto sensing Front Panel SR Series SR Series Front Panel Forty character by two line high contrast blue backlit LCD display Showing current UTC time and date current offset to external reference clock synchronisation status GPS status and number of satellites used LF radio signal quality and last successful decode Rear Panel SR Series Rear Panel SC Series Rear Panel 2008 TimeTools Limited All right reserved Page 7 www TimeTools co uk TimeTools SR SC Series Network Time Protocol Server Installation Guide Rear Panel Connectors IEC Switched Mains Inlet TNC GPS Antenna Connection LF AUX Input LAN CONSOLE Rear Panel Status LED s LF LED Yellow PWR LED Red GPS LED Yellow GPS Antenna LED Red Double Fused Switched IEC mains inlet 100 240VAC 50 60Hz 0 1A Fuse 2x T 0 315A LBC 250V 50 ohm TNC female connector to 5 volt GPS antenna There should be 5V between the centre pin and outer barrel of the connector which should be present all the way up to the GPS antenna If 5 volts is not present at the antenna coax connector it generally indicates a break in the cable Any break in the cable is generally where the RF connectors are joined to the coax 9 way D type female Pin 3 RS232 level NMEA GPS output Pin 5 GND Also accepts MSF DCF 77 LF radio antenna SR MXS 00 SR DXS 00 10 100 Mbit BaseT RJ45 Auto sensing 9 way D type female RS232 Serial Console connectio
24. Menu TimeTools NTP s5000 Series Network Time Server Internet Explorer Provided By Sky Broadband kef OG wns O OoOo o e OE File Edit View Favorites Tools Help Links 4 amp Customize Links 2 Free Hotmail Windows Wb Windows Marketplace Windows Media Google Go 19 ES YP Bookmarksw PageRank S O blocked P Check y X Autolink e YH autoril ep Sendtov 4 gt O Settings w We de egl E NTP server and SNTP Time S C TmeTaols NTP 55000 Ser x m dh gt Ey Page Ch Toos TimeTools SR Series NTP Network Time Server TimeTools Time Server Control Menu NTP Time Server Control Reboot Reset To Factory Defaults Cancel Copyright 2002 2008 TimeTools Limited TimeTools Limited Web www TimeTools co uk All Rights Reserved 91 High Park Crescent Email info TimeTools co uk Dudley DY3 10S Tel 44 0 1902 673551 United Kingdom Fax 44 0 870 123 1844 e hd Internet amp 100 Reboot The reboot option restarts the time server It is used to make any network configuration changes active Factory Defaults The factory defaults menu option reverts all settings back to the factory defaults However the console and telnet admin passwords are not changed 2008 TimeTools Limited All right reserved Page 25 www TimeTools co uk TimeTools SR SC Series Network Time Protocol Server Installation Guide Uploading User Generated SSL Certificates The SR9xxx and SC9xxx models can acc
25. P server s time Typical Synchronisation Hierarchy Higher Stratum GPS LF radio TCXO SR9750 SR9850 SC9705 models only Other Peered Stratum 1 NTP Servers Lower Stratum External NTP Servers Lower Stratum Local Clock 2008 TimeTools Limited All right reserved Page 10 www TimeTools co uk TimeTools SR SC Series Network Time Protocol Server Installation Guide LF Radio Transmitter Coverage The SR SC Series NTP Server can be supplied with either DCF 77 or MSF radio antennas The DCF 77 transmitter is located at Frankfurt Germany The coverage of the DCF 77 transmitter is Central and North Western Europe kd s CH n O A DCF 77 Radio Signal Coverage Transmitter based at Frankfurt Germany The MSF transmitter is located at Anthorn Cumbria UK The coverage of the MSF transmitter is the whole of the British Isles and can often be received in much of North Western Europe F Ex a e lt T EC Ww ENIM F J E EE x E A p Pu Iis T3 1 p p a e TERT pa ye L I HE rr ae Pura qu pm s A ie y S Pai a NN eL HT a lle a i i i g al E E ud ci i ae iili i 3 3 5 pa A n MSF Radio Signal Coverage Transmitter based at Anthorne Cumbria UK 2008 TimeTools Limited All right reserved Page 11 www TimeTools co uk TimeTools SRYSC Series Network Time Protocol Server Installation Guide MSF DCF 77 Radio Antenna Installation The SR
26. 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 LO 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 12 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 IO LOSS OF DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD PARTIES OR A EFALBURE OE THE PROGRAM TO OPERATE WITE ANY OTHER PROGRAMS EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES 2008 TimeTools Limited All right reserved Page 52 www TimeTools co uk TimeTools SR SC Series Network Time Protocol Server Installation Guide END OF TERMS AND CONDITIONS How to Apply These Terms to Your New Programs If you develop a new program and you want it to be of the greatest possible use to the public the best way to achieve this is to make it free software which everyone can redistribute and change under these terms To do
27. PS antenna Available with a range of outputs in either compact or rack mount enclosures TimeTools Limited has relied on representations made by its suppliers in certifying this product as RoHS compliant TimeTools Limited is not responsible for the operation or failure of operation of GPS satellites or LF time amp frequency broadcasts or the availability of GPS satellite or LF radio signals In no event will TimeTools Limited be liable for any indirect special incidental or consequential damages from the sale or use of this product This disclaimer applies both during and after the term of the warranty TimeTools Limited disclaims liability for any implied warranties including implied warranties of merchantability and fitness for a specific purpose All specifications subject to change without notice Terms and conditions of sale available on request Page 41 TimeTools SRYSC Series Network Time Protocol Server Installation Guide Appendix C DATASHEET SC SERIES KEY FEATURES Linux based true Stratum 1 NTP time servers Industry leading 5 year warranty 12 channel GPS MSF DCF 77 and dual reference clock options Rugged compact Aluminium enclosure Very low power consumption aiding reliability High stability TCXO options for extended holdover Secure easy to use HTTPS SSL SSH configuration BENEFITS Synchronize thousands of network time clients Accurately synchronize time critical process
28. SC Series NTP Server can be supplied with either MSF or DCF 77 radio antennas LF Radio Antennas Four versions of LF radio antenna are available with the SR Series NTP Server MLS TimeTools Standard MSF radio antenna DLS TimeTools Standard DCF 77 radio antenna MXS TimeTools High Gain MSF radio antenna for weak signal strength areas DXS TimeTools High Gain DCF 77 radio antenna for weak signal strength areas The antenna needs to be mounted above ground away from any sources of electrical interference Metal structures can act as a Faraday cage blocking signal penetration Therefore the antenna must be located externally of any metal structures The SR series NTP server display provides a real time signal strength indicator This should read a steady 100 any less indicates loss of timing information Also displayed is the last decoded time reception which should increment each minute as time broadcasts are received MLS DLS Antenna Installation The MLS DLS LF antenna is a unidirectional active ferrite antenna The antenna should be installed in a horizontal plane at right angles to the source of the radio transmission The antenna incorporates a red green LED which flashes in tune to the LF radio transmission Ideally the antenna needs to be located where a consistent red green flash can be observed once per second If the antenna LED flashes erratically or if the LED is completely red or green the antenna may need to be reloca
29. SR9210 SC7105 SC9205 In the event that GPS or LF radio time references fail models without a TCXO oscillator will fall back to using any alternative external NTP time references that may be configured changing stratum accordingly If no alternative external NTP time references are configured or if they fail stratum 1 operation will cease after a further 9 hours and the device will enter an unsynchronised state NTP Peering NTP can be configured to agree a common time between a number of NTP servers on a network Peering allows a number of NTP servers to communicate together to provide a network with the same agreed time Peering can be used to provide a high degree of redundancy Only servers with known good clocks should be peered together The IP address or fully qualified domain name of peered NTP servers can be entered into the External Time Server field of the NTP Configuration Menu See Web Interface section External Backup NTP Servers Many Internet based NTP servers will not allow peering Therefore if you want to configure an external NTP server that does not allow peering as a backup time reference to be used in the event of failure of the primary reference you will need to use the NTP server command in the NTP configuration file You can append commands to the NTP configuration file using the Edit NTP Configuration option in the NTP Configuration Menu The server command has a single operand the IP addr
30. TimeTools SR SC Series Network Time Protocol Server USER GUIDE Models Covered SR9850 SR9750 SC9705 SR9210 SC9205 SR7110 SC7105 Firmware Revision 1 0 004a onwards Date 12 December 2010 Version 1 0 004b1 O Copyright 2010 TimeTools Limited Tel 44 0 1902 673551 TimeTools Limited Fax 44 0 870 123 1844 91 High Park Crescent Email Info TimeTools co uk Dudley DY3 1QS UK Web www TimeTools co uk TimeTools SR SC Series Network Time Protocol Server Installation Guide Table of Contents INTOdUCION id ii a its 5 Key Features a A id 5 KEY Benelli cT a o S 5 Network Time Protocol NTB sarral a E 6 NTP SRSC Series Hardware aiii laico 7 POW CT es T P T A E E EAE E E E E Lu E E E ATE m T EEE T 7 GPS and LF Antenna Connection c cccccccssececceesceccenececeeseeceecesseeeccsegeeessaeeeessuecesseueeessuaseesaueeeessaueeessgeeesauesessegeessas 7 EINEMOENEIWOK aioa e e a VI ML e E O E T Rear Panels mini D aa T Rear Fan LC OMNIA dd tl o do e EN 8 Rear Panel Stats LEDS TI nia cce 8 NTP SynchronIiSatioON e 9 oratum ODO tae meee neni er eer eet oe Oe me te ee ene Pre eee oar ee eg eee Cn ee ee ee rier ee ere 9 Loss of Hardware Clock Synchronisation TCXO Models SR9750 SR9850 SC9705 eene 9 Loss of Hardware Clock Synchronisation Non TCXO Models SR7110 SR9210 SC7105 SC9205 9 WERT TP TET 9 External B
31. ackup NTP Servers ccccccecccceececeeeeeeeeceeeeceeeeeseeeeseeeeseaeeseeeeeeeeeeseeeeseaeessaeessaeeeseueeeseeessaeesseeeseneessaeessneeees 9 bocal Duc 9 Typical Synchronisation Hierarchy ssi uu ieu etos eco Fine ro o race a 10 LF Radio Transmitter COVerage iooeeec a ITdE OE s ennnen 11 EI Teadio Antenna Suert ses tol losa 12 MLS DLS Antenna Installation oooccccccnnonoccnnonoconnncnoconocononcnnononononronononnnnonnnnnnonrnnnrnnnnnnnnrnnnnnnnnrnnononnncnanannnnns 12 MP eS DXS Antennas tell WOM eR E O 12 Typical Maximum GPS Cable Length TWS3978 GPS Antenna cooccccccoccncccoccnccnnconononcnnonononononcnnonnnrnnonannnonnnrnnnonannnns 14 SRxxxx 10 and SCxxxx 10 High Sensitivity GPS Receiver occooocccccoccocococoncccnconoconcnnoconnnconnnonononconononnnnonnnnnnononranenoness 14 OR AMPIE RE ET m EET 14 Surge SUPpreS SO E TTE ce TETTE dni 14 GPS Time AGQuisSIBOD scene dato ae aee aD M rA be Die LA MM MON a d e QAM tod A aate 14 SR SENSES C ONNGULIUO Pew RC Re 16 Been E di 16 A Ee ON SOE Rr om Se eee ee cee Renee 17 Network Gonrigurdaion Menta o dll id do do 20 Security COMMPG EAU OM rl ts ate tt lirio dialers 21 NIF COniguraton M 22 Log Messages sta A AA E ADA AAA a os eee AAA 24 Uploading User Generated SSL Certificates oooocccconnnccccncnncccoconooconancnnnannnonnnanonnnnnronnn nn
32. adio communications Operation of this equipment in a residential area is likely to cause harmful interference in which case the user will be required to correct the interference at his own expense For PLUGGABLE EQUIPMENT the socket outlet shall be installed near the equipment and shall be easily accessible 2008 TimeTools Limited All right reserved Page 4 www TimeTools co uk TimeTools SR SC Series Network Time Protocol Server Installation Guide Introduction Network Time Protocol NTP can be used to synchronize the time on network clients across an IP network to the correct time of an NTP time server TimeTools SR Series NTP Servers provide a stratum 1 NTP Time Server for ensuring the time is correct across an entire network The SR Series Network Time Server acquires time from the MSF or DCF 77 Radio Signals or GPS satellite constellation and distributes time across a network using the TCP IP Network Time Protocol NTP Network managers appreciate the fact that the SR SC Series is a complete time server housed in a self contained rack mountable unit SR series or compact enclosure SC Series Cost savings are achieved by the simple configuration and installation compared to configuring a conventional workstation as a time server Savings continue with the elimination of software upgrade costs and network synchronization management Key Features Stand alone dedicated Stratum 1 NTP Time Server Robust 1U high rack mountabl
33. allation Guide ___ _A _ a degree view of sky GPS Antenna TMC Connector GPS Antenna Mount Outdoor Indoor Coax Cable Keep the cable run from where the cable enters the building to the surge suppressor as short as possible GPS Surge Cable To Suppressor NTP Server N type Connectors TNC Connector Typical GPS Antenna installation 2008 TimeTools Limited All right reserved Page 15 www TimeTools co uk TimeTools SR SC Series Network Time Protocol Server Installation Guide SR Series Configuration The SR Series can be configured in a number of ways Web HTTP page via network Via RS232 Console Port to host computer Telnet session via network Secure Web HTTPS page via network SR9xxx SC9xxx only Secure SSH SR9xxx SC9xxx only Default Configuration Security Console Telnet FTP username Console Telnet FTP password HTTP Web Password Network Configuration Domain Name Name Server 1 A Name Server2 9 TTP Enabled HTTPS Disabled Telnet Enabled SSH Disabled FTP Enabled nabled IP Address OOOO Network Mask Default Gateway e O NTP Configuration External NTP Server Address 1 A OOOO External NTP Server Address2 S Key CST External NTP Server Address 3 gt A AAA SSS Ss Key STA NTP Broadcast Address BOO EIN AA Local System Clock Stratum Trusted Keys AO NTP Keys EA O 2008 TimeTools Limited All right reserved Page 16 www
34. an extra 20db of gain on top of the antenna gain This allows for extended GPS cable runs beyond 100m depending on cable types SR7110 00 SR9210 00 SR9750 00 SR9850 00 Console Configuration Cable Product User Guide and NTP Client CD Optional SR Series LF Radio Reference Clock Antennas High Gain MSF UK Active Antenna High Gain DCF 77 German Antenna Ultra High Gain MSF UK Antenna Ultra High Gain DCF 77 German Antenna SR MLS 00 SR DLS 00 SR MXS 00 SR DXS 00 Optional SR Series GPS Reference Clock Antennas and Accessories Jam Resistant Pole Mounting GPS Antenna and Mount 30m RG58 Cable 50m RG58 Cable Additional cable lengths available on request GPS Surge Suppressor GPS Amplifier 20db LF GPS over optical fibre systems GPS Splitters 2 to 32 way compact or rack mount T WS3978 TCX 030 TCX 050 SPP GPS T AD200 8 P O A P O A 2008 TimeTools Limited All right reserved www TimeTools co uk Indoor Unit LF GPS Over Optical Fibre A LF GPS over fibre system allows RF radio and GPS signals to be transmitted with minimal losses over long cable distances It provides a secure and interference free link through noisy environments The technology transparently provides cross site connection between a LF radio GPS antenna and receiver unit GPS Splitters 2 to 32 Way Options TimeTools can provide a range of GPS splitters to allow multiple GPS devices to share a single G
35. e and a notice that there is no warranty or else saying that you provide a warranty and that users may redistribute the program under these conditions and telling the user how to view a copy of this License Exception if the Program itself is interactive but does not normally print such an announcement your work based on the Program is not required to print an announcement These requirements apply to the modified work as a whole If identifiable sections of that work are not derived from the Program and can be reasonably considered independent and separate works in themselves then this License and its terms do not apply to those sections when you distribute them as separate works But when you distribute the same sections as part of a whole which is a work based on the Program the distribution of the whole must be on the terms of this License whose permissions for other licensees extend to the entire whole and thus to each and every part regardless of who wrote it Thus Xt Ts not the Invent of his section to claim Fronts or contest your rights to work written entirely by you rather the intent is to exercise the right to control the distribution of derivative or collective works based on the Program In addition mere aggregation of another work not based on the Program with the Program or with a work based on the Program on a volume of a storage or distribution medium does not bring the other work under the scope of t
36. e definition files plus the scripts used to control compilation and installation of the executable However as a Special exception the source code distributed need not include anything that is normally distributed in either source or binary form with the major components compiler kernel and so on of the Operating system on which the executable runs unless that component itself accompanies the executable If distribution of executable or object code is made by offering access to copy from a designated place then offering equivalent access to copy the source code from the same place counts as distribution of the source code even though third parties are not compelled to copy the source along with the object code 4 You may not copy modify sublicense or distribute the Program except as expressly provided under this License Any attempt otherwise to copy modify sublicense or distribute the Program is void and will automatically terminate your rights under this License However parties who have received copies or rights from you under this License will not have their licenses terminated so long as such parties remain in full compliance 5 You are not required to accept this License since you have not signed it However nothing else grants you permission to modify or distribute the Program or its derivative works These actions are prohibited by law if you do not accept this License Therefore by modifying or distributing the P
37. e enclosure SR or compact enclosure SC Linux based fully static design no unreliable hard disk drives Convenient front panel display detailing time and signal integrity SR series 10 100 Base T Ethernet connectivity Can accurately synchronise the time on any NTP or SNTP compatible client including Windows 95 98 ME NT 2000 XP Novell 5 amp 6 UNIX and CISCO Routers and Hubs Web Telnet FTP and RS232 remote configuration e Secure HTTPS and SSH remote configuration SR9xxx SC9xxx models Key Benefits e Highly reliable and secure source of time for your Network e Easy to install configure and maintain e Accurately synchronize mission critical network operations and applications across thousands of network clients e Secure source of time inside your firewall 2008 TimeTools Limited All right reserved Page 5 www TimeTools co uk TimeTools SR SC Series Network Time Protocol Server Installation Guide Network Time Protocol NTP NTP is a computer network protocol which is used to synchronise time on computers across a network NTP stands for Network Time Protocol Dr David Mills of the University of Delaware invented it over 25 years ago He saw a growing need to synchronise time on computers Now many distributed computer processes and applications rely on precise system time Transaction processing event logging CCTV and DVR applications all rely on accurate time stamping NTP has a hierarchical structu
38. ended up to 100m using RG58 coax Fig MXS DXS High Gain LF Radio Antenna Dimensions Length 210mm Diameter 20mm Weight 200g Connector BNC male Cable length 5m Maximum Cable Length 100m RG58 2008 TimeTools Limited All right reserved Page 45 www TimeTools co uk TimeTools SR SC Series Network Time Protocol Server Installation Guide Appendix E Optional High Gain GPS Antenna E mn BC fm Environmental Specifications Operating temp 40c to 85c 45c to 85c storage Weather Proof IP67 Mechanical Dimensions 60 mm dia x 21 mm H Weight 50g Housing GE Lexan EXL9330 Mounting 74 thru hole or bracket mount Connector TNC jack connector Shock Vertical axis 50G Other axes 30G Vibration 3 axis sweep 15 min 10 200 Hz log sweep 3G Antenna Response Frequency 1575 42 MHz Gain 90 3 dBic 20 2 0 dBic Polarization Right Hand Circular Axial ratio 90 4 dB 20 6 dB Electrical Voltage 2 7 to 5 5 VDC Current 15mA ESD circuit protection 15KV LNA Specifications Frequency 1572 5 1578 MHz Output Impedance 50 Ohm VSWR 1 5 1 max at connector Gain 40 dB typical Noise figure 0 5 dB typical 2008 TimeTools Limited All right reserved Page 46 www TimeTools co uk TimeTools SR SC Series Network Time Protocol Server Installation Guide Appendix F Optional GPS Surge Suppressor Specification e Industries best RF performance e Low throughput
39. ept a user generated SSL certificate for authentication The user generated certificate must be uploaded into the SR series tmp admin directory using ftp The uploaded certificate then needs to be saved into flash using the certsave command available from a console session to the time server Savecert syntax savecert save SSL certificate to flash usage savecert filename save user certificate filename to flash savecert remove remove user certificate from flash and use default certificate The device will need to be restarted for the changes to take effect 2008 TimeTools Limited All right reserved Page 26 www TimeTools co uk TimeTools SR SC Series Network Time Protocol Server Installation Guide Console Configuration RS232 Console Configuration Use the console configuration cable provided to connect the console port of the SR Series to a serial port of a computer A dumb terminal emulator such as Hyper Terminal can then be used on the computer to access the configuration menu of the NTP server Dumb Terminal Configuration Settings Connect Using Direct to COMx where x is the com port number Bits per second 9600 Data bits 8 Parity None Stop bits 1 Flow control None Terminal Emulation ANSI Once the dumb terminal has been configured and the console cable connected to the correct COM port the login prompt will appear by pressing ENTER Telnet Session via Remote Host
40. eries GPS MSF radio DCF 77 radio and dual GPS radio reference capabilities The SC series provides true flexibility High Stability and Performance High stability disciplined TCXO oscillator options are available to maintain accurate time for extended periods in the event of GPS radio reference clock signal loss Secure Configuration and Maintenance An easy to use password protected user interface HTTP HTTPS SSL SSH is provided for system configuration and management FTP can be utilised to download NTP statistics and upload firmware upgrades provided by TimeTools free of charge 5 Year Warranty The SC Series NTP Server is a low power convection cooled device with no moving parts aiding long term reliability Our confidence in the reliability of the device is reflected in the provision of an industry leading 5 year warranty SC7105 The SC7105 is an entry level Linux based true NTP time server at a highly competitive price It can utilise GPS or LF radio time references to provide stratum 1 NTP functionality ideal for synchronising digital wall clocks and smaller networks SC9205 The mid range SC9205 provides a high specification NTP network time reference lt incorporates a high throughput Ethernet network interface combined with the ability to accept GPS LF radio or dual reference GPS LF radio external time references The SC9205 is an ideal time reference where a large number of network time clients are to
41. es Accurate traceable time reference inside your firewall Reliable timing information derived from atomic time Simple to install configure and maintain WARRANTY amp SUPPORT COMPLIANCE CE vc FE PRODUCT OVERVIEW TimeTools new SC Series NTP servers provides a complete range of Linux based true Stratum 1 NTP Network Time Servers that provide a real breakthrough in price and performance The SC Series are compact NTP servers housed in rugged aluminium enclosures Ideal for applications with space saving requirements By utilising a customized Linux kernel and an unmodified version of the latest network time protocol distribution NTP version 4 2 the SC series offers true NTP SNTP functionality The SC series provides a reliable highly accurate traceable source of time inside your firewall UPDATE The SR series is now provided with a cutting edge high sensitivity GPS receiver that can often operate with an indoor located GPS antenna Additionally the new receivers can operate from a single satellite in view making operation from a window often possible These features potentially provide a great saving on installation costs when compared to traditional roof mounted GPS antennas Of course our GPS antennas are completely weather proof and can still be roof mounted if required Multiple Reference Clock Options Multiple optional external reference clock combinations can be provided with the SC s
42. ess or fully qualified domain name of the server to be used server time b nist gov Domain name of external NTP time server server 129 6 15 28 IP address of external NTP time server In the event of failure of the primary synchronisation reference the backup server will be used for synchronisation In this event the stratum of the NTP server will be one less than the stratum of the synchronisation server ie If the synchronisation server is stratum 2 the device will become stratum 3 The NTP server will only revert to stratum 1 operation when the primary synchronisation reference GPS or LF radio comes back on line Local Clock The SR series has an internal battery backed real time clock local clock that NTP synchronises using the configured reference clocks The local clock can also be used as an NTP reference clock itself if other sources of time fail 2008 TimeTools Limited All right reserved Page 9 www TimeTools co uk TimeTools SR SC Series Network Time Protocol Server Installation Guide The local system clock stratum specifies the stratum level of the local system clock that is used as backup in the event of primary reference clock loss or failure Setting the local system clock stratum to 16 default disables this feature Warning the local system clock is unsynchronised and is prone to drift It should therefore only be used if synchronisation of clients to the NTP server is required regardless of the accuracy of the NT
43. eys Contains key identifiers and keys controlling authentication of Network Time Protocol NTP transactions 2008 TimeTools Limited All right reserved Page 23 www TimeTools co uk TimeTools SR SC Series Network Time Protocol Server Installation Guide Log Messages TimeTools NTP s5000 Series Network Time Server Internet Explorer Provided By Sky Broadband kef Go http 192 168 0 33 t3 cgi EJES Google y File Edit View Favorites Tools Help Links 4 amp Customize Links Free Hotmail Windows WB Windows Marketplace Windows Media Google C The device obtains accure Go ui amp E v T Bookmarks w PageRank q ESh 0 blocked Y Check v y AutoLink y YE AutoFill eb Send tow 3 C Settings w Y od 88 amp NTP Server and SNTP Time 5 TimeTools NTP s5000 Seri x a 5 2 T Page F Tools 3 TimeTools SR Series NTP Network Time Server TimeTools Log Messages System Log Messages Nov 10 14 20 21 none syslog info syslogd started BusyBox v1 00 2005 06 29 14 57 0000 Nov 10 14 20 23 none user info udhcpc udhcp client v0 9 8 started Nov 10 14 20 23 none user debug udhcpc Sending discover Nov 10 14 20 24 none user debug udhcpc Sending select for 192 168 0 33 Nov 10 14 20 24 none user info udhcpc Lease of 192 168 0 33 obtained lease time 86400 Nov 10 14 20 24 none daemon info inetd 103 Online and ready 2 sockets Nov 10 14 20 25 none daemon
44. f outputs in either compact or rack mount enclosures GPS Surge Suppressor The SPP GPS is a multi strike maintenance free GPS surge suppressor It protects valuable network equipment from potential lightning strikes and other voltage surges Product Codes SC Series NTP Time Servers SC 7105 GPS LF NTP Server SC7105 00 SC 9205 GPS LF Dual Reference NTP Server SC9205 00 SC 9705 GPS LF Dual Reference NTP Server with TCXO SC9705 00 Scope of Supply SC Series NTP Time Server IEC Mains Lead Console Configuration Cable Product User Guide and NTP Client CD Optional sc Series LF Radio Reference Clock Antennas Time Tools Limited has relied on representations made by its High Gain MSF UK Active Antenna SR MLS 00 suppliers in certifying this product as RoHS compliant High Gain DCF 77 German Antenna SR DLS 00 Ultra High Gain MSF UK Antenna SR MXS 00 Time Tools Limited is not responsible for the operation or failure Ultra High Gain DCF 77 German Antenna SR DXS 00 of operation of GPS satellites or LF time amp frequency broadcasts Optional SC Series GPS Reference Clock Antennas and Accessories or the availability of GPS satellite or LF radio signals In no event will Time Tools Limited be liable for any indirect special incidental or consequential damages from the sale or Jam Resistant Pole Mounting GPS Antenna and Mount T WS3978 use of this product This disclaimer applies both during and after 30m RG58 Cable TCX 030
45. for satellites fails to find a strong GPS signal the receiver enters deep search mode and the time to first fix may take longer than normal If during this period the receiver is moved into bright signal conditions the time to first fix may also take longer GPS Amplifier Single or multiple GPS in line amplifiers may be installed to significantly increase cable runs if required product code T AD200 8 GPS amplifiers should be placed in line on the coax cable at the mid point between the GPS antenna and receiver Surge Suppressors Externally mounted GPS antennas can be prone to lightning strikes and other electrical surges TimeTools recommends fitting surge suppressors product code SPP GPS to all externally mounted GPS antennas The suppressor should be fitted where the GPS coax cable from the antenna enters the building The surge suppressor requires a connection to a low impedance ground For more information about installing surge suppressors please visit the PolyPhaser web site at www polyphaser com GPS Time Acquisition On power up the GPS receiver will search the sky in order to collect satellite orbital information This process is fully automatic and under normal circumstances will take 3 4 minutes to achieve a signal lock However it can take much longer in challenging reception areas 2008 TimeTools Limited All right reserved Page 14 www TimeTools co uk TimeTools SR SC Series Network Time Protocol Server Inst
46. gral batteries to be free from defects in material and workmanship during a one year period The Warranty begins on the date the unit is shipped from TimeTools TimeTools liability under this Warranty is limited to repairing or replacing at TimeTools option the defective equipment and providing upgrade version changes for firmware In case of repair the product must be returned to an authorized TimeTools Solutions Service Center This Warranty does not apply if repairs are required due to acts of nature beyond TimeTools control such as but not limited to lightning strikes power surges misuse damage neglect or if repairs modifications have been made or attempted by anyone other than personnel authorized by TimeTools IN NO EVENT WILL TIMETOOLS LIMITED BE LIABLE FOR ANY INDIRECT SPECIAL INCIDENTAL OR CONSEQUENTIAL DAMAGES FROM THE SALE OR USE OF THIS PRODUCT THIS DISCLAIMER APPLIES BOTH DURING AND AFTER THE TERM OF THE WARRANTY TIMETOOLS LIMITED DISCLAIMS LIABILITY FOR ANY IMPLIED WARRANTIES INCLUDING IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A SPECIFIC PURPOSE Repair and Returns To obtain service under this Warranty contact TimeTools at the address below during the Warranty period to receive a Return Material Authorization RMA number and shipping instructions Then ship the product transportation prepaid for inspection Ship to TimeTools Limited Attn RMA XXXXXXX 91 High Park Crescent Dudley DY3 1QS
47. hat you conspicuously and appropriately publish on each copy an appropriate copyright notice and disclaimer of warranty keep intact all the notices that refer to this License and to the absence of any warranty and give any other recipients of the Program a copy of this License along with the Program You may charge a fee for the physical act of transferring a copy and you may at your option offer warranty protection in exchange for a fee Ze YOU may modrlrty vour ocopy or copies ort the Program of any portion of it thus forming a work based on the Program and copy and distribute such modifications or work under the terms of Section 1 above provided that you also meet all of these conditions a You must cause the modified files to carry prominent notices stating that you changed the files and the date of any change 2008 TimeTools Limited All right reserved Page 49 www TimeTools co uk TimeTools SR SC Series Network Time Protocol Server Installation Guide b You must cause any work that you distribute or publish that in whole or in part contains or is derived from the Program or any part thereof to be licensed as a whole at no charge to all third parties under the terms of this License C If the modified program normally reads commands interactively when run you must cause it when started running for such interactive use in the most ordinary way to print or display an announcement including an appropriate copyright notic
48. he device to synchronise correctly The GPS status or the LF radio status will show BAD indicating too great a difference between the received reference clock time stamp and the devices system time UTC 09 40 27 Tue 11 Nov 2008 Os l6us SOIN E GPS BAD 0 LF 100 Bad In this event the real time clock will need to be adjusted to within 10 minutes of the correct time from a telnet session see section Correcting the System Time 2008 TimeTools Limited All right reserved Page 35 www TimeTools co uk TimeTools SR SC Series Network Time Protocol Server Installation Guide Correcting the System Time If the device has been powered off for an extended period of time the units system time stored in its battery backed real time clock may have drifted too far away from the correct time in order for synchronisation to correctly occur The LCD or web configuration fields GPS status or LF radio status will show Bad when a GPS or radio signal lock is achieved In this event the unit s system time will need to be adjusted manually to within 10 minutes of the correct UTC time This can be done by opening a telnet session and logging into the device and using the setclock command C telnet 192 168 0 10 where 192 168 0 10 is the IP address of the NTP server Linux 2 4 31 NTPO01 0 NTPOO1 login admin username admin password admin default password admin BusyBox v1 00 2005 06 29 14 57 0000 Built in shell ash
49. his License 3 You may copy and distribute the Program or a work based on it under Section 2 in object code or executable form under the terms of Sections 1 and 2 above provided that you also do one of the following a Accompany it with the complete corresponding machine readable source code which must be distributed under the terms of Sections l and 2 above on a medium customarily used for software interchange or b Accompany it with a written offer valid 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 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 interchange or C Accompany it with the information you received as to the offer to distribute corresponding source code This alternative is allowed only for noncommercial distribution and only if you received the program in object code or executable form with such an Offer in accord with Subsection b above The source code for a work means the preferred form of the work for making modifications to it For an executable work complete source code means all the source code for all modules it contains plus any 2008 TimeTools Limited All right reserved Page 50 www TimeTools co uk TimeTools SR SC Series Network Time Protocol Server Installation Guide associated interfac
50. ilable from http www ipswitch com products file transfer asp Typical FTP Settings Host 192 168 0 200 IP address of time server Port 21 standard FTP port Host Type UNIX standard User ID admin Password admin Change directory to tmp admin Upload the firmware upgrade tarball file SRmm x x xxx tgz to tmp admin directory 3 Installing Firmware From a telnet session login as admin password admin unless password modified gt telnet 192 168 0 200 gt NTP001 Login admin gt Password admin Extract firmware as follows gt extract SRmm x x xxx tgz Execute extract script where SRmm x x xxx tgz is the update file WARNING DO NOT TURN OFF OR RESET DEVICE UNTIL UPGRADE COMPLETE Update complete Finally reboot the time server for the firmware upgrade to take effect gt restart 4 Checking New Version Number When the unit has restarted use a web browser to check that the firmware version number has been updated The unit has now been successfully updated O 2008 TimeTools Limited All right reserved Page 32 www TimeTools co uk TimeTools SR SC Series Network Time Protocol Server Installation Guide NIP Authentication Symmetric Key Cryptography The original RFC 1305 specification allows any one of possibly 65 534 keys each distinguished by a 32 bit key identifier to authenticate an association The servers and clients involved must agree on the key and key identifier t
51. info LCD 111 Starting LCD display handler daemon LCD Handler 1 0 001 Nov 10 14 20 25 none daemon notice ntpd 116 ntpd 4 2 0 1 1161 r Sun Dec 11 15 28 12 GMT 2005 3 Nov 10 14 20 25 none daemon debug ntpd 116 signal no reset signal 13 had flags 4000000 Nov 10 14 20 25 none daemon info ntpd 116 precision 298 000 usec Nov 10 14 20 26 none daemon info init MStarting pid 123 console dev ttyS1 sbin getty Nov 10 14 20 26 none daemon err ntpd 116 no IPv6 interfaces found Nov 10 14 20 26 none daemon info ntpd 116 kernel time sync status 0040 Nov 10 14 24 43 none daemon info ntpd 116 synchronized to SHM 0 stratum 0 Nov 10 14 24 09 none daemon notice ntpd 116 time reset 34 692884 s Nov 10 14 28 30 none daemon info ntpd 116 synchronized to SHM 0 stratum 0 Nov 10 14 39 13 none daemon notice ntpd 116 kernel time sync enabled 0001 Copyright amp 2002 2008 TimeTools Limited TimeTools Limited Web www TimeTools co uk All Rights Reserved 91 High Park Crescent Email info TimeTools co uk Dudley DY3 10S Tel 44 0 1902 673551 United Kingdom Fax 44 0 870 123 1844 v Done Internet A 100 The log messages window displays the current contents of the system log This includes all NTP information and error messages 2008 TimeTools Limited All right reserved Page 24 www TimeTools co uk TimeTools SR SC Series Network Time Protocol Server Installation Guide Time Server Control
52. io and GPS signals to be transmitted with minimal losses over long cable distances It provides a secure and interference free link through noisy environments The technology transparently provides cross site connection between a LF radio GPS antenna and receiver unit Jam Resistant GPS Antenna The TWS3978 high gain permanent mount The MXS DXS LF antenna is a GPS antenna is ideal for timing applications unidirectional ultra high gain ferrite such as the SC Series It features a antenna for the SC series NTP pone dou o arme palca servers The highly sensitive active element for maximum signal reception t is ideal for I i ESD circuit protection a very low noise 0 5 amenna SIEA ROM PONE signa strength areas The antenna is dB 3 stage LNA circuit and a SAW filter enabling the TWS3978 to provide a reliable available in MSF UK and DCF 77 and clear GPS signal while minimizing loss German transmitter versions The of lock even when conditions are less than antenna is provided with 5m of cable ideal which can easily be extended up to 100m using RG58 coax GPS Inline Amplifier 20db GPS Splitters 2 to 32 Way Options The GPS inline amplifier offers an extra 20db TimeTools can provide a range of GPS of gain on top of the antenna gain This splitters to allow multiple GPS devices to allows for extended GPS cable runs up to share a single GPS antenna Available and beyond 100m depending on cable types with a range o
53. ired Information Oscillator freerun start SR9750 9850 5C9705 TCXO oscillator starting free run stratum 1 holdover due to loss of GPS radio reference clock signal The following messages are generated by the NTP daemon all models Type Log Message Description precision 306 000 usec Estimated system precision kernel time sync status 0040 Clock unsynchronised kernel time sync disabled 0001 NTP clock unsynchronised Notice kernel time sync enabled 0001 NTP clock synchronised A correct time O 2008 TimeTools Limited All right reserved Page 31 www TimeTools co uk TimeTools SRYSC Series Network Time Protocol Server Installation Guide Updating SR Series Firmware Updating the SR series NTP Server firmware is very straightforward 1 Obtain Firmware Upgrade Firmware upgrades can be obtained from http www timetools co uk support The firmware upgrade is stored as a compressed tarball that must be uploaded to the time server and unpacked This is a very simple exercise IMPORTANT Ensure firmware upgrade matches model type of installation unit Eg SR71 x x xxx tgz for TimeTools SR7110 and SC7105 series NTP server models SR92 x x xxx tgz for TimeTools SR9210 and SC9205 series NTP server models SR97 x x xxx tgz for TimeTools SR9750 SR9850 and SC9705 series NTP server models 2 Uploading Firmware Using Ftp To upload the firmware upgrade to the unit requires the use of an FTP Client such as WS FTP ava
54. iting satellites primarily used for positioning and navigation However the GPS system also provides very precise timing information GPS signals can be received anywhere provided that an antenna can be located with a good view of the sky There are also a number of national radio time and frequency broadcasts available WWVB in the US MSF in the UK and DCF 77 in Germany These broadcasts provide an accurate source of time within and local to national boundaries 2008 TimeTools Limited All right reserved Page 6 www TimeTools co uk TimeTools SRYSC Series Network Time Protocol Server Installation Guide NTP SR SC Series Hardware The SR SC Series is complete NTP time server housed in a 1U high rack mountable enclosure It has a 40 character by 2 line backlit LCD display for status and configuration information The rear of the unit has 5 connections RJ45 LAN GPS antenna LF aux port console and IEC power inlet Power Integrated Universal 100 240 VAC 50 60 Hz CE UL CSA Approved PSU Standard double fused switched IEC inlet Power consumption approx 5W Console RS232 9 Way D Type connection for status and configuration via dumb terminal emulator Windows Hyper terminal Terminal settings 9600 Bits Sec No Parity 8 Data Bits 1 Stop Bit GPS and LF Antenna Connection LF MSF 60 DCF 77 Radio Antenna RS232 9 Way D type connection GPS TNC connection for 5 Volt GPS antenna Ethernet Network 10 100 BaseT RJ45
55. l Rights Reserved 91 High Park Crescent Email info TimeTools co uk Dudley DY3 10S Tel 44 0 1902 673551 United Kingdom Fax 44 0 870 123 1844 r internet S An 01 Hostname Hostname of time server Domain Network domain name Name Server 1 IP address of DNS name server 1 Name Server 2 IP address of DNS name server 2 Syslog Server 1 Optional IP address for remote system log syslog messages Network Services Shows which network services are currently enabled For added security any or all network services can be disabled HTTPS and SSH are only available on SR9xxxXSC9xxxx models IP Address Network IP Address of the time server Subnet Mask Network mask Default Gateway Network default gateway DHCP Enable Dynamic Host Configuration Protocol 2008 TimeTools Limited All right reserved Page 20 www TimeTools co uk TimeTools SR SC Series Network Time Protocol Server Installation Guide Security Configuration Time Tools NIP s5000 Series Network Time Server Internet Explorer Provided By Sky Broadband File Edit View Favorites Tools Help Links 4 amp Customize Links Free Hotmail Windows Wb Windows Marketplace Windows Media Google C rhe device obtains accur Go ui amp E X T Bookmarks w PageRank q ESh 0 blocked Y Check v w AutoLink y YE AutoFill eb Send tow 3 C Settings w We de egl E NTP server and SNTP Time S Tmetaols NTP s5000 Seri x mc dh Ey Page
56. n for device configuration using dumb terminal emulator eg Hyperterminal Null modem cable supplied for connection to standard 9 way PC serial interface supplied Pulses in tune to the MSF or DCF 77 LF radio time code broadcast when a LF radio antenna is connected SR MXS 00 SR DXS 00 When a good radio signal is being received the LED should provide a steady regular one pulse per second flash If the LED flashes erratically or is completed on or off it indicates that a weak signal is being received In this instance the radio antenna may need to be repositioned or relocated Pulse width 100ms 200ms 300ms Mains power has been applied to the device Pulses one pulse per second when a GPS lock has been achieved This pulse is used as a highly accurate reference for synchronisation Pulse width 50msec The red LED next to the GPS antenna connection when illuminated indicates that there is a cable fault to the GPS antenna The LED is illuminated when there is a short circuit between in the inner core and outer sheath of the coax cable to the antenna The coax cable should be examined for faults 2008 TimeTools Limited All right reserved Page 8 www TimeTools co uk TimeTools SRYSC Series Network Time Protocol Server Installation Guide NTP Synchronisation On power up NTP generally starts in an unsynchronised state Network time clients will be unable to obtain time from the device until it has synchronised its internal clock
57. ndix F Optional GPS Surge Suppressor Specification ooonccccnncicococicocococonacocananonannnnannnnnnanonnnanono 47 Appendix G Copyright and Permission NoticCesS oooncccncncoccncccccnnccocacoconacononaronancnnnnnronnnnrnnnnnrrnnnnernnnrenanans 48 Network Time Protocol NT E Az Ca t UE rM E MM uL LE Te 48 ONU PUDIC LNCS iC Ctr ccs Pp 48 Append H VV ANU INU Y REO DD A UE CN 54 2008 TimeTools Limited All right reserved Page 3 www TimeTools co uk TimeTools SR SC Series Network Time Protocol Server Installation Guide Note While reasonable efforts have been taken in the preparation of this document to ensure its accuracy TimeTools Limited assumes no liability resulting from any errors or omissions in this manual or from the use of the information contained herein All claims based on information publicly available at time of printing All product or service names mentioned in this document are trademarks of the companies with which they are associated Important Note This equipment has been tested and found to comply with the limits for a Class A digital device pursuant to Part 15 of the FCC Rules These limits are designed to provide reasonable protection against harmful interference when the equipment is operated in a commercial environment This equipment generates uses and can radiate radio frequency energy and if not installed and used in accordance with the instruction manual may cause harmful interference to r
58. nnnnnnnnnnnnnrnnnnononnnnnnnncnnnnns 35 correcting the System TINE uud cm env oil 36 SR DENIES SY STOM LOGS ec RS 37 2008 TimeTools Limited All right reserved Page 2 www TimeTools co uk TimeTools SR SC Series Network Time Protocol Server Installation Guide AppendDC A SDpeciTICallOls aco D onda Cede con be astu c eate coacto sence estes ea cerea eae DUE D DE eee 38 AppendbcB DATASHEET SR SERIES union eo xe a A eee eee 39 PRODUC TOVER VIEW e n 39 Prod ct Comparison Chau A 40 GPS and LF Antenna Options and Accessories ccccccccecccceececeececeeeecaeeeesueceseecesacesaeeceseeeesecessueetsueeesseeeseeesaes 41 Produet Ads uto ee p d meme M e o 41 Appendix C DATASHEET SC SERIES xir oko a a a Duet pacta E eno tole 42 PRODUCT OVER V IE VV munidae o a o e des I M hh CIA aC e A O 42 PIOGUGE COMPAS Gha annn aote tosiio aid ADEM Leo oido 43 GPS and LF Antenna Options and Accessories ccccccsecccsececaececeeeecesneccaeeecaueeceuaesseneecaeeesaueessuaeseasaeseaeeesseeesoes 44 FP FOCUIGE COG SS ERR 44 Appendix D Optional LF Radio Antennn ccccsceceeseeeeeeneeeeeneeeeeeeseeseeseas esses nnn n annua anna nasa nnns nuns 45 MES IDES Antenna nstalatio lea a od da se 45 MXS DXAS Antenna InstalatiONM s torta it 45 Appendix E Optional High Gain GPS Antenna ooccccocncccncccononcconcnnccnnnnonnnnnnnnanononaronanaronnnnrrnnnrrnannrrnannnnnnanrs 46 Appe
59. ns type show c for details The hypothetical commands show w and show c should show the appropriate parts of the General Public License Of course the commands you use may be called something other than show w and show c they could even be mouse clicks or menu items whatever suits your program You should also get your employer if you work as a programmer or your School 3r Many CO S 0HH 8 Copyritony disclaimer for the program irf necessary Here is a sample alter the names Yoyodyne Inc hereby disclaims all copyright interest in the program Gnomovision which makes passes at compilers written by James Hacker lt signature of Ty Coon gt 1 April 1989 Ty Coon President of Vice This General Public License does not permit incorporating your program into proprietary programs If your program is a subroutine library you may consider it more useful to permit linking proprietary applications with the library If this is what you want to do use the GNU Library General Public License instead of this License 2008 TimeTools Limited All right reserved Page 53 www TimeTools co uk TimeTools SRYSC Series Network Time Protocol Server Installation Guide Appendix H Warranty TimeTools Limited warrants the SR Series NTP Time Servers to be free from defects in material and workmanship during a three year period TimeTools Limited warrants GPS and LF antennas GPS amplifiers antenna cables and any inte
60. nses in effect making the program proprietary To prevent this we have made it clear that any patent must be licensed for everyone s free use or not licensed at all The precise terms and conditions for copying distribution and modification follow GNU GENERAL PUBLIC LICENSE TERMS AND CONDITIONS FOR COPYING DISTRIBUTION AND MODIFICATION 0 This License applies to any program or other work which contains a notice placed by the copyright holder saying it may be distributed under the terms of this General Public License The Program below refers to any such program or work and a work based on the Program means either the Program or any derivative work under copyright law that 1s to say a work containing the Program or a portion of it either verbatim or with modifications and or translated into another language Hereinafter translation is included without limitation in the term modification Each licensee is addressed as you Activities other than copying distribution and modification are not covered by this License they are outside its scope The act of running the Program is not restricted and the output from the Program is covered only if its contents constitute a work based on the Program independent of having been made by running the Program Whether that is true depends on what the Program does 1 You may copy and distribute verbatim copies of the Program s Source code as you receive it in any medium provided t
61. o authenticate NTP packets Keys and related information are specified in a key file Besides the keys used for ordinary NTP associations additional keys can be used as passwords for the ntpq and ntpac utility programs When ntpd is first started it reads the key file and installs the keys in the key cache However individual keys must be activated with the trusted keys command before use This allows for instance the installation of possibly several batches of keys and then activating or deactivating each batch remotely using ntpdc This also provides a revocation capability that can be used if a key becomes compromised NTP Keys NTP Keys are entered in the following format KeyNumber M Key where KeyNumber A positive integer 1 to 65 534 M Specifies that Key is a 1 to 8 character ASCII string using the MD5 authentication scheme Key The key itself Trusted Keys The trusted keys specifies the key identifiers which are trusted for the purposes of authenticating peers with symmetric key cryptography as well as keys used by the ntpq and ntpdc programs The authentication procedures require that both the local and remote servers share the same key and key identifier for this purpose although different keys can be used with different servers The key arguments are 32 bit unsigned integers with values from 1 to 65 534 2008 TimeTools Limited All right reserved Page 33 www TimeTools co uk TimeTools SR SC Series Network Time Pr
62. ols SR SC Series Network Time Protocol Server Installation Guide GPS Lock 8 Signifies that a GPS signal lock has been achieved along with the number of satellites in currently in use If no GPS antenna is connected to the device and other external clock references are being utilised this field will remain as GPS NoLock 0 LF 100 09 40 Signifies that a good 100 radio signal is currently being received along with the time of the last correctly decoded LF time stamp If the indicator falls below 10096 then broadcast time stamp data is being lost which will result in failure to decode transmitted time and date information The time indicates the last correctly decoded broadcast LF radio time stamp Most radio transmissions broadcast time data each minute therefore ideally this time should increment each minute as new timestamps are received LCD Display Device Unsynchronised If no external reference clock synchronisation has been possible for a period of time eventually the display will show INO SYNC indicating that the device has entered an unsynchronised mode and will no longer provide synchronisation to network time clients UTC 09 40 27 Tue 11 Nov 2008 Os 16us DINOS rll GEPS HobockSU LE MeugInrt LCD Display Internal Manual Time Adjustment Required If the device has been powered off for an extended period the internal time stored in the real time clock may have drifted too far away from the correct time in order for t
63. on A separate password exists for http web interface sessions The http web interface password can only be changed from the web interface NTP Configuration Gs O x TimeTools SRU Series NIP Network Time Server NTP Configuration External HIP Servers server Address 1 Key server Address 2 Key server Address 3 Key NTP Broadcasting Broadcast Address Key Local System Clock Local System Clock Stratum 16 Trusted Keys Lil Edit Parameters 2 Save Parameters X Exit Selection Display and edit NTP configuration parameters TimeTools SRYSC Series Network Time Protocol Server Installation Guide System Control Menu c Telnet 192 168 0 33 TimeTools SRU Series WIF Wetwork Time Server System Control Menu Lil Reboot 2 Factory Defaults 831 Exit Selection Allow time server to be rebooted and revert to factory settings In order for any network changes to take effect the time server should be rebooted Reverting to factory defaults does not affect the console password However the http web password reverts to admin 2008 TimeTools Limited All right reserved Page 30 www TimeTools co uk TimeTools SR SC Series Network Time Protocol Server Installation Guide System Log SysLog Messages System log messages are generated by both the NTP daemon and the reference clock daemon to warn of a system status change Log messages can be viewed from the tmp admin folder using ft
64. otocol Server Installation Guide SR Series NTP Server Operation LCD Display LCD Display Initial Power Up On power up the SR Series LCD display will remain blank for approximately 20 seconds while the unit performs a self test The device will then attempt to obtain network settings from a DHCP server When network settings are obtained from the network DHCP server the device will display the assigned DHCP IP address for 5 seconds The IP address can then be used to configure the device over a network using telnet SSH HTTP or SSL HTTPS sessions C Copyright 2008 TimeTools Limited IP Address 192 169 0 4 If no DHCP server is present on the network the device will not be assigned an IP address Configuration will therefore need to be carried out using the serial RS232 console connection to a PC serial port and dumb terminal emulator see section Console Configuration C Copyright 2008 TimeTools Limited IP Address unknown LCD Display Initial Operation When network settings have been obtained the device will then show its normal status display The current UTC Coordinated Universal Time time and date which is held internally by the devices real time clock will be shown The current time offset compared to any available external time references will be shown this defaults to 16usec on start up Synchronisation Sync Init indicates that the device is waiting for external time references to come online
65. p the log tab of the system web page or by remote syslog messaging The following messages are generated by the LF GPS TCXO reference clock daemon Log Message Description ERROR GPS communications timedout All Models Communications error with GPS receiver GPS possible hardware fault Warning No GPS signal lock All Models GPS signal lock lost possibly due to GPS poor antenna location or faulty GPS antenna cable Warning LF radio reception timedout All Models No valid radio timestamp received during LF last 3 minutes possibly due to poor radio antenna location or faulty antenna cable Warning Warning TCXO oscillator calibration after Yof SR9750 9850 5C9705 Invalid TCXO calibration to GPS LF radio Debug secs outside expected range f f f references possible hardware fault Jof secs Warning Oscillator freerun period end SR9750 9850 5C9705 The 24 hour TCXO oscillator stratum 1 holdover free run period has come to an end Information TimeTools Dual GPS LF NTP Reference All Models Reference clock driver startup message Clock Driver Started Information GPS signal lock OK All Models GPS signal lock regained after loss of GPS signal Information LF radio reception OK All Models LF radio reception resumed after loss of LF signal Information Holdover oscillator calibrated SR9750 9850 5C9705 TCXO holdover oscillator calibrated to GPS LF radio and is ready to run if requ
66. re At the highest level or stratum are precise hardware clocks which can synchronise to highly accurate external time references such as GPS or national radio time and frequency broadcasts These hardware clock devices are known as stratum O devices A stratum 1 time server obtains time directly from a hardware clock and is the most accurate reference in the NTP hierarchy All lower stratum devices obtain time from the stratum above over a network As the network introduces timing discrepancies lower stratum devices are a factor less accurate A hierarchical structure allows the overhead of providing time to many clients to be shared among many time servers Not all clients need to obtain time directly from a stratum 1 reference but can utilise stratum 2 or 3 references This has obvious advantages in large networks such as the Internet to spread the load However in practice on small networks all clients can obtain time from a single stratum 1 time server NTP generally operates on a client server basis A network time client periodically requests time from a time server The time server responds with a packet of information containing a time stamp The time stamp is then used by the client to synchronise its system time Complex algorithms are used to calculate the time a packet takes to get to the server and back again so as to eliminate or reduce any timing inaccuracies introduced by the network itself NTP uses UTC Universal Time Coordina
67. rogram or any work based on the Program you indicate your acceptance of this License to do so and all ito terms and conditions Lor copying distributing Qr modiiying the Program or works based on it 6 Each time you redistribute the Program or any work based on the Program the recipient automatically receives a license from the original licensor to copy distribute or modify the Program subject to these terms and conditions You may not impose any further restrictions on the recipients exercise of the rights granted herein You are not responsible for enforcing compliance by third parties to this License 7 If as a consequence of a court judgment or allegation of patent infringement or for any other reason not limited to patent issues conditions are imposed on you whether by court order agreement or otherwise that contradict the conditions of this License they do not excuse you from the conditions of this License If you cannot distribute so as to satisfy simultaneously your obligations under this License and any other pertinent obligations then as a consequence you may not distribute the Program at all For example if a patent license would not permit royalty free redistribution of the Program by all those who receive copies directly or indirectly through you then the only way you could satisfy both it and this License would be to refrain entirely from distribution of the Program If any portion of this section is held in
68. rrrnnnnnrrrnannrrrnnanrenns 26 Console Contigua nica A sa wmadeusas one iustunctueavncatawees 27 195292 Console CORIIGFatiOD 35 30 cat uno dod atten Leni asso lid 27 Dumb Terminal Configuration Settings ccccccccccseeceeseeeeeeeeeeeeseeeeeeseeeeeseeeeeeseeeeeesaeeesseeeeeseeeeeeseeeeeesaeeeesaneeessaeeeesaees 27 Telnetsession via Remote HOST eoe uet oS Erebi A dee aces oes e Ue Ud tenues e LN Lea a 27 Secure Telnet Session SSH via Remote HOSt ccoooncncococnncccnconoconcnccnononcnnnconononcnnnnnnnnnonnnnnnnnnrnnnnonnnnnnonannnnnnnrnnenaness 27 LEG INGO bee o iii 27 COMMOU PATON IWS WU DNE RE LT m 28 Network Configuration Menu ee 28 Security Configuration Menue m t 29 NTP CODNOULAUO ia ee N ee ee 29 System COMMON MENU cri E E SIUN 30 System Eog SysLog Messages cia a a a a 31 Updating SR Series Firmware eese teer RR 32 NIP AUMEN a O a a MET 33 Symmetrie Key Cryptography oc dnd doth ee aea lite ia 33 NERAK ON oc dada 33 TUSEA K MP 33 SR Series NTP Server Operation LCD Display 11 eeeeeeeeeeeeeeee nene enne nnn nn nnn nnn n hann 34 ECD Dis play Initial uo i o ae 34 LCD Display Initial OD GratiOns C Tc ds 34 LCD Dis olay Normal Operation si a IT 34 LCD Display Device Uns ACI e MU NU DE 35 LCD Display Internal Manual Time Adjustment Required ccccooccnccccccncconcnnononnncnnnconcnncnnonon
69. s the limitation as if written in the body of this License 9 The Free Software Foundation may publish revised and or new versions of the General Public License from time to time Such new versions will be similar in spirit to the present version but may differ in detail to address new problems or concerns Each version is given a distinguishing version number If the Program Specifies a version number of this License which applies to it and any later version you have the option of following the terms and conditions either of that version or of any later version published by the Free Software Foundation If the Program does not specify a version number of this License you may choose any version ever published by the Free Software Foundation 10 If you wish to incorporate parts of the Program into other free programs whose distribution conditions are different write to the author to ask for permission For software which is copyrighted by the Free Software Foundation write to the Free Software Foundation we sometimes make exceptions for this Our decision will be guided by the two goals of preserving the free status of all derivatives of our free software and of promoting the sharing and reuse of software generally NO WARRANTY 11 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
70. sistant GPS Antenna The TWS3978 high gain permanent mount GPS antenna is ideal for timing applications such as the SR Series It features a perfectly tuned custom ceramic patch element for maximum signal reception ESD circuit protection a very low noise 0 5 dB 3 stage LNA circuit and a SAW filter enabling the TWS3978 to provide a reliable and clear GPS signal while minimizing loss of lock even when conditions are less than ideal GPS Surge Suppressor The SPP GPS is a multi strike maintenance free GPS surge suppressor It protects valuable network equipment from potential lightning strikes and other voltage surges Product Codes SR Series NTP Time Servers SR 7110 GPS LF NTP Server SR 9210 GPS LF Dual Reference NTP Server SR 9750 GPS LF Dual Reference NTP Server with TCXO SR 9850 GPS LF Dual Reference NTP Server with TCXO Scope of Supply SR Series NTP Time Server IEC Mains Lead GPS and LF Antenna Options and Accessories MXS DXS Ultra High Gain Radio Antenna The MXS DXS LF antenna is a unidirectional ultra high gain ferrite antenna for the SR series NTP servers The highly sensitive active antenna is ideal for low signal strength areas The antenna is available in MSF UK and DCF 77 German transmitter versions The antenna is provided with 5m of cable which can easily be extended up to 100m using RG58 coax GPS Inline Amplifier 20db The GPS inline amplifier offers
71. so attach the following notices to the program It is safest to attach them to the start of each source file to most effectively convey the exclusion of warranty and each file should have at least the copyright line and a pointer to where the full notice is found one line to give the program s name and a brief idea of what it does Copyright C year name of author This program is free software you can redistribute it and or modify it under the terms of the GNU General Public License as published by the Free Software Foundation either version 2 of the License or at your option any later version This program is distributed in the hope that it will be useful but WITHOUT ANY WARRANTY without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE See the GNU General Public License for more details You should have received a copy of the GNU General Public License along with this program if not write to the Free Software Foundation Lincs 5l Franklin St Fifth Floor Boston MA 02110 1301 USA Also add information on how to contact you by electronic and paper mail If the program is interactive make it output a short notice like this when it starts in an interactive mode Gnomovision version 69 Copyright C year name of author Gnomovision comes with ABSOLUTELY NO WARRANTY for details type show w This is free software and you are welcome to redistribute it under certain conditio
72. stall configure and maintain WARRANTY amp SUPPORT COMPLIANCE CE Vc FE PRODUCT OVERVIEW TimeTools new SR Series NTP servers provides a complete range of Linux based true Stratum 1 NTP Network Time Servers that provide a real breakthrough in price and performance Housed in a rugged yet compact 1U high rack mountable enclosure the SR series takes up minimal valuable rack space By utilising a customized Linux kernel and an unmodified version of the latest network time protocol distribution NTP version 4 2 the SR series offers true NTP SNTP functionality The SR series provides a reliable highly accurate traceable source of time inside your firewall UPDATE The SR series is now provided with a cutting edge high sensitivity GPS receiver that can often operate with an indoor located GPS antenna Additionally the new receivers can operate from a single satellite in view making operation from a window often possible These features potentially provide a great saving on installation costs when compared to traditional roof mounted GPS antennas Of course our GPS antennas are completely weather proof and can still be roof mounted if required Multiple Reference Clock Options Multiple optional external reference clock combinations can be provided with the SR series GPS MSF radio DCF 77 radio and dual GPS radio reference capabilities The SR series provides true flexibility High Stability
73. ted The antenna can be located up to 100m from the time server using CAT3 or better patch lead or structured cabling Fig MLS DLS LF Radio Antenna MXS DXS Antenna Installation The MXS DXS LF antenna is a unidirectional high gain active ferrite antenna ideal for low signal strength areas The antenna should be installed in a horizontal plane at right angles to the source of the radio transmission The antenna incorporates a red green LED which flashes in tune to the LF radio transmission Ideally the antenna needs to be located where a consistent red green flash can be observed once per second If the antenna LED flashes erratically or if the LED is completely red or green the antenna may need to be relocated The antenna is provided with 5m of cable which can be extended up to 100m using RG58 coax Fig MXS V DXS High Gain LF Radio Antenna 2008 TimeTools Limited All right reserved Page 12 www TimeTools co uk TimeTools SR SC Series Network Time Protocol Server Installation Guide The DCF 77 LF radio antenna should be installed in a horizontal plane at right angles to the source of the radio transmitter located at Frankfurt Germany o iii ie Peet The MSF LF radio antenna should be installed in a horizontal plane at right angles to the source of the radio transmitter located at Anthorne Cumbria UK 2008 TimeTools Limited All right reserved Page 13 www TimeTools co uk TimeTools SR SC Series Net
74. ted time which is very similar to GMT time It knows nothing of local time zones or daylight saving time It is a function of the time client to apply an offset to the supplied time to adjust for local time In this manner a time server located anywhere in the world can provide synchronisation to a client located anywhere else in the world It allows clients to utilise different time zone and daylight saving properties The protocol is fault tolerant its internal algorithms can automatically select the best of a selection of external time sources to synchronise to Also multiple references can be peered to minimize any accumulated timing discrepancies Depending on network traffic and the accuracy of the server most clients can be synchronised to within a couple of milliseconds of the correct time Most modern operating systems support either the Network Time Protocol NTP or Simple Network Time Protocol SNTP in some form or other Originally developed for Linux it has since been ported in various forms to UNIX Netware and Microsoft Windows SNTP is a simplified form of the protocol it does not have some of the complex algorithms to maintain high precision time However the two protocols are entirely interchangeable a SNTP client can synchronise to a NTP server A number of external time references are available that can be used as a hardware reference clocks for NTP The most common being GPS The GPS system is a constellation of 24 orb
75. ternal NTP Servers External NTP Server Address 1 Key External NTP Server Address 2 Key External NTP Server Address 3 Key NTP Broadcasting NTP Broadcast Address Key Local Clock Local System Clock Stratum Trusted Keys Display NTP Keys Edit NTP Keys Edit NTP Configuration Copyright 2002 2008 TimeTools Limited TimeTools Limited Web www TimeTools co uk All Rights Reserved 91 High Park Crescent Email info TimeTools co uk Dudley DY3 10S Tel 44 0 1902 673551 United Kingdom Fax 44 0 870 123 1844 Waiting for http 192 168 0 33 t3 cgi i ed Internet R100 _ _ ___________ __ ______ _ __ _ _ _ _ _ _ _ _ _ _ __ AA External NTP Servers Upto three external NTP servers can be peered with the time server to provide backup in the event of primary time source loss or failure In this mode the local clock can be synchronized to the remote peer or the remote peer can be synchronized to the local clock This is useful in a network of servers where depending on various failure scenarios either the local or remote peer may be the better source of time NTP Broadcasting In broadcast mode the local server sends periodic broadcast messages to a client population at the address specified which is usually the broadcast address on one of the local network s or a multicast address
76. that you know you can do these things To protect your rights we need to make restrictions that forbid anyone to deny you these rights or to ask you to surrender the rights These restrictions translate to certain responsibilities for you if you distribute copies of the software or if you modify it For example if you distribute copies of such a program whether gratis or for a fee you must give the recipients all the rights that you have You must make sure that they too receive or can get the 2008 TimeTools Limited All right reserved Page 48 www TimeTools co uk USA TimeTools SR SC Series Network Time Protocol Server Installation Guide Source code And you must show them these terms so they know their rights We protect your rights with two steps 1 copyright the software and 2 offer you this license which gives you legal permission to copy distribute and or modify the software Also for each author s protection and ours we want to make certain that everyone understands that there is no warranty for this free software If the software is modified by someone else and passed on we want its recipients to know that what they have is not the original so that any problems introduced by others will not reflect on the original authors reputations Finally any free program is threatened constantly by software patents We wish to avoid the danger that redistributors of a free program will individually obtain patent lice
77. the term of the warranty TimeTools Limited disclaims liability for 50m RG58 Cable TCX 050 any implied warranties including implied warranties of Additional cable lengths available un request merchantability and fitness for a specific purpose GPS Surge Suppressor SPP GPS All specifications subject to change without notice GPS Amplifier 20db T AD200 8 LF GPS over op tical fibre sys tatis P O A Terms and conditions of sale available on request GPS Splitters 2 to 32 way compact or rack mount P O A 2008 TimeTools Limited All right reserved www TimeTools co uk Page 44 TimeTools SRYSC Series Network Time Protocol Server Installation Guide Appendix D Optional LF Radio Antenna The SR Series NTP Server can be supplied with either MSF or DCF 77 radio antennas The MSF transmitter is located at Anthorn Cumbria UK The coverage of the MSF transmitter is the whole of the British Isles and can often be received in much of North Western Europe The DCF 77 transmitter is located at Frankfurt Germany The coverage of the DCF 77 transmitter is Central and North Western Europe Four versions of LF radio antenna are available with the SR Series NTP Server MLS TimeTools Standard MSF radio antenna DLS TimeTools Standard DCF 77 radio antenna MXS TimeTools High Gain MSF radio antenna for weak signal strength areas DXS TimeTools High Gain DCF 77 radio antenna for weak signal strength areas MLS DLS Antenna Installation
78. to a time reference To synchronise its internal clock the device needs to be provided with an accurate source of time Generally accurate time is provided by a GPS or LF radio external time reference however you can also configure the NTP server to synchronise to other NTP servers or use its internal real time clock as a time reference Stratum 1 Operation Stratum 1 operation of a NTP server is only guaranteed by synchronising the device with external hardware time references such as GPS or LF radio These external hardware time references can be considered to be stratum O references the highest stratum in the NTP hierarchy In order to maintain stratum 1 synchronisation a NTP server must be supplied regular precise time stamps by an external hardware reference clock such as a GPS or radio time reference Loss of Hardware Clock Synchronisation TCXO Models SR9750 SR9850 SC9705 In the event that GPS or LF radio time references fail models with a TCXO oscillator will maintain stratum 1 operation for a holdover period of 24 hours When the holdover period expires they will fall back to using any alternative external NTP time references that may be configured changing stratum accordingly If no alternative external NTP time references are configured or if they fail stratum 1 operation will cease after a further 9 hours and the device will enter an unsynchronised state Loss of Hardware Clock Synchronisation Non TCXO Models SR7110
79. valid or unenforceable under any particular circumstance the balance of the section is intended to apply and the section as a whole is intended to apply in other circumstances It is not the purpose of this section to induce you to infringe any patents or other property right claims or to contest validity of any such claims this section has the sole purpose of protecting the integrity of the free software distribution system which is 2008 TimeTools Limited All right reserved Page 51 www TimeTools co uk TimeTools SR SC Series Network Time Protocol Server Installation Guide implemented by public license practices Many people have made generous contributions to the wide range of software distributed through that system in reliance on consistent application of that system it is up to the author donor to decide if he or she is willing to distribute software through any other system and a licensee cannot impose that choice This section is intended to make thoroughly clear what is believed to be a consequence of the rest of this License 8 If the distribution and or use of the Program is restricted in certain countries either by patents or by copyrighted interfaces the original copyright holder who places the Program under this License may add an explicit geographical distribution limitation excluding those countries so that distribution is permitted only in or among countries not thus excluded In such case this License incorporate
80. work Time Protocol Server Installation Guide GPS Antenna Installation The SR Series NTP Server has an integrated GPS receiver An optional external antenna provides synchronisation with the global positioning system GPS solutions can be utilised anywhere in the world The optional GPS antenna is a high gain jam resistant pole mounting GPS antenna For correct operation the GPS antenna needs to have an un obscured view of the sky As a rule of thumb the better the view of the sky the more chance of a good consistent signal lock Ideally the antenna should be roof mounted with a 360 degree view of the sky However satisfactory operation can often be achieved by sitting the antenna on the side of a building or on a widow sill Typical Maximum GPS Cable Length TWS3978 GPS Antenna Cable Type Max Cable Distance RG58 LMR200 LMR240 100m SRxxxx 10 and SCxxxx 10 High Sensitivity GPS Receiver Later SR and SC series NTP servers with model postfix 10 and later are fitted with a high sensitivity GPS receiver with over determined clock The high sensitivity mode often allows the GPS antenna to be located indoors or in a window considerably reducing installation costs and eliminating the need for surge suppression The over determined clock mode allows the receiver to operate from a single satellite in view which allows the receiver to obtain a signal lock in highly challenging conditions In high sensitivity mode if the initial search

TimeTools tServe 5000 Installation Manual

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