Meinberg M900 Operating Instructions Manual Download Page 18 | Manualshive

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Meinberg M900 Operating Instructions Manual Download Page 18

The high precision orbit parameters of a satellite are called ephemeris parameters
whereas a reduced precision subset of the ephemeris parameters is called a satellite’s
almanac. While ephemeris parameters must be evaluated to compute the receiver’s
position and clock offset, almanac parameters are used to check which satellites are in
view from a given receiver position at a given time. Each satellite transmits its own
set of ephemeris parameters and almanac parameters of all existing satellites.

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Summary of Contents for M900

Page 1: ...Technical Information Operating Instructions M900 GPS PZF Redundant SHS ...

Page 2: ...nformation Meinberg Funkuhren GmbH Co KG Lange Wand 9 D 31812 Bad Pyrmont Telephone 49 0 52 81 9309 0 Telefax 49 0 52 81 9309 30 Internet http www meinberg de E Mail info meinberg de Bad Pyrmont 4 September 2009 ...

Page 3: ...7 GPS satellite controlled clock 17 GPS170 Features 19 Time Zone and Daylight Saving 19 Mounting the GPS Antenna 20 Assembly with CN UB E 21 General information DCF77 PZF 22 Features of PZF5xx 23 Antenna 24 Assembly of antenna 24 Precision Time Protocol PTP IEEE1588v2 25 General Information 26 Functionality in Master Systems 27 Functionality in Slave Systems 27 Booting the GPS receiver 28 Booting ...

Page 4: ...up Time Zone 40 Menu TIME CODE IRIG Output 41 Menu Synthesizer Frequency Output 41 Programmable pulse Option 42 SETUP POUT X 42 Mode 42 Timer mode 43 Single Pulse 43 Cyclic mode 44 PPS PPM PPH Modes 44 Menu PZF Reference Time 45 Info PZF 45 Status Version 45 Correlation Field 45 Setup PZF 46 Transmitter Distance 46 Ignore Lock Simulation Mode 47 Initial Time 47 Setup Serial Out 47 Menu Time Servic...

Page 5: ...m events 69 E mail messages 69 Windows Popup Messages 70 SNMP TRAP messages 70 VP100 NET wall mount display 70 User defined Alarm scripts 71 NTP Client Monitoring 71 Alarm messages 72 Configuration Security 73 Password 74 HTTP Access Control 74 SSH Secure Shell Login 75 Generate SSL Certificate for HTTPS 76 NTP keys and certificates 77 SNMP Parameter 77 Configuration NTP 78 NTP Authentication 81 N...

Page 6: ...n 109 CLI NTP Autokey 109 CLI Local 110 Administrative functions 110 User Management 111 Administrative information 111 Software Update 113 SNMP Support 114 Configuration over SNMP 116 Examples for the usage of the SNMP configuration features 117 Further configuration possibilities 118 Send special timeserver commands with SNMP 118 Configuration of the timeserver with SNMP Reference 120 SNMP Traps...

Page 7: ...onnector Pin Assignments 141 Timecode option 142 Abstract 142 Principle of Operation 142 Block Diagram Timecode 142 IRIG Standard Format 143 AFNOR Standard Format 144 Assignment of CF Segment in IEEE1344 Code 145 Generated Time Codes 146 Selection of Generated Time Code 146 Outputs 147 AM Sine Wave Output 147 PWM DC Output 147 Technical Data 147 Time Strings 148 Format of the Meinberg Standard Tim...

Page 8: ...Global Option File 162 Third party software 163 Operating System GNU Linux 163 Samba 163 Network Time Protocol Version 4 NTP 164 mini_httpd 164 GNU General Public License GPL 165 Reference 169 ...

Page 9: ...led without any obstructions to the sky SV CONSTELLATION SV in view 10 Good Svs 9 Sel 01 21 16 22 If the PZF receiver remains asynchronous the field strength has to be checked press buttons i OK i OK OK i OK from main menu The antenna has to be installed at a proper position PZF STATE CORR 66 STATE fine FIELD 95 M300 can be used in redundant mode or in SHS Secure Hybrid System mode In redundant mo...

Page 10: ...rfaces Services Choose the menu point Interfaces to change to IPV4 ETH0 configuration page to enter the IP address netmask and the default gateway NOTE These settings are related to the first Ethernet connection ETH0 SETUP Ipv4 ETH0 DHCP disabled 172 16 3 226 SETUP IPv4 ETHO Ipv4 NETMASK 255 255 255 0 SETUP IPv4 Ipv4 GATEWAY 172 16 3 1 After this all further settings can be done via network interf...

Page 11: ... modular chassis and ready to operate A simplified LINUX operating system is installed on the single board computers flash disk Both reference clocks the GPS and the PZF receiver will be managed as redundant clocks by the NTP directly Eight push buttons and a 4 x 40 character LC display can be used to configure and monitor the timeserver After the network connection has been established the timese...

Page 12: ...built in NTP time server which makes the reference time available to the network In order to prevent the NTP server from spreading a faulty reference time in the network the hybrid receiver includes two independent standard radio clocks Both the satellite receiver GPS170 and the long wave receiver PZF5xx have their own signals and high quality crystal oscillators which let the radio clocks provide...

Page 13: ...d via the network 13 Terminal connector serial interface Vt100 38400Baud 8N1 Nullmodem to PC Status LED Referenz time green synchronized red error Status LED NTP time service green synchronized red error Status LED Network connection green Link red error Status LED Alarm red error OK button save changes or enter submenu ESC button cancel menu and one level up 4 arrow buttons select next menu and c...

Page 14: ...nter via SNMP traps or automatically generated e mails where they can be recorded Furthermore all alarm messages can be displayed by the large display VP100 20 NET that is accessed via network connection In order to avoid a service interruption several LANTIME NTP servers can be installed in the same network to obtain redundancy Supported Network Services The following network services are provide...

Page 15: ...User Interface terminal connection via serial interface status LED Web browser interface with graphical statistic of the one day cycle offsets Telnet or Secure Shell Login for password protected operation of the Linux operating system FTP access for updating the operating system and downloading log files Simple Network Management Protocol for automatically SNMP Traps in case of alarm SYSLOG messag...

Page 16: ...ronization of hardware clocks in local and global networks The basic concept version 1 Mills88 was published in 1988 as RFC Request For Comments Experiences made from the practical use in Internet was followed by version 2 Mills89 The software package NTP is an implementation of the actual version 3 Mills90 based on the specification RFC 1305 from1990 directory doc NOTES Permission to use copy mod...

Page 17: ...stem The Global Positioning System GPS is a satellite based radio positioning navigation and time transfer system It was installed by the United States Department of Defence and provides two levels of accuracy The Standard Positioning Service SPS and the Precise Positioning Service PPS While PPS is encrypted and only available for authorized military users SPS has been made available to the genera...

Page 18: ...alled a satellite s almanac While ephemeris parameters must be evaluated to compute the receiver s position and clock offset almanac parameters are used to check which satellites are in view from a given receiver position at a given time Each satellite transmits its own set of ephemeris parameters and almanac parameters of all existing satellites 18 ...

Page 19: ...eds up initial synchronization at power up Time Zone and Daylight Saving The GPS time differs from the universal time scale UTC by the number of leap seconds which have been inserted into the UTC time scale after GPS started in 1980 The current number of leap seconds is part of the navigation message supplied by the satellites so the GPS170 receivers internal time scale is based on UTC Conversion ...

Page 20: ...l mounting and clamps for pole mounting are added to every GPS170 A standard coaxial cable with 50 Ω impedance should be used to connect the antenna converter unit to the receiver The maximum length of cable between antenna and receiver depends on the attenuation factor of the used coaxial cable Example Up to four GPS170 receivers can be run with one antenna converter unit by using the optional an...

Page 21: ...Assembly with CN UB E 21 ...

Page 22: ...s build of the same number of logical 0 and logical 1 to get a symmetrical PZF to keep the average phase of the carrier constant The length of one bit is 120 DCF clocks corresponding to 1 55 ms The carrier of 77 5 kHz is modulated with a phase deviation of 10 per bit The bit sequence is transmitted each second it starts 200ms after the beginning of an AM second mark and ends shortly before the nex...

Page 23: ... be used as a standard frequency generator besides the application as a time code receiver Six fixed and one settable TTL level standard frequencies are available at the rear VG connector The synthesizer frequency exists as an open drain output and a sine wave signal also The PZF5xx delivers TTL low and TTL high active pulses per minute and per second further To distribute information concerning d...

Page 24: ...tance of several meters to TV or computer monitors must be kept After switching the PZF5xx to the menu PZF STATE the adjustment of the antenna can be executed The displayed value is proportional to the received field strength The best method of mounting the antenna is to look for the minimum field strength and turn the antenna by 90 to maximum then A high field strength on its own is no guarantee ...

Page 25: ...ll select the same Grandmaster The other not selected Grandmaster Clocks will step back and enter passive mode meaning that they do not send out synchronization packets as long as that is done by the selected master The installed network infrastructure components play a big role in a PTP network and directly influence the level of accuracy that can be reached on the clients Asymmetric network conn...

Page 26: ...y the module is capable of building a PTP Master or Slave system The Time Stamp Unit integrated in a FPGA Field Programmable Gate Array programmable logic device checks the data traffic on the MII interface between the PHY receiver physical connection to the network and the Ethernet controller MAC of the module TSU V2 If a valid PTP packet is detected the Time Stamp Unit takes a time stamp that is...

Page 27: ...he GPS controlled clock The reference clock of TSU V2 50 MHz is derived from the GPS disciplined oscillator of the reference time source by using a PLL Phase Locked Loop of the FPGA The direct coupling of the time stamp unit to the GPS system is achieved in this way Functionality in Slave Systems After decoding a valid time information from a PTP Master the system sets it s own PTP seconds a nanos...

Page 28: ...he valid almanac When the receiver has found four satellites in view it can update its new position and switch to Normal Operation If the almanac has been lost because the battery had been disconnected the receiver has to scan for a satellite and read in the current almanacs This mode is called Cold Boot It takes 12 minutes until the new almanac is complete and the system switches to Warm Boot mod...

Page 29: ...puter and the GPS and PZF receiver Until synchronization is finished the following message is displayed GPS ASY PZF SYN NTP SYN REF PZF Thu 01 01 2008 UTC 12 00 00 The NTPD will try to synchronize either to GPS or to PZF receiver redundantly For the synchronization of the NTPD with the GPS it is necessary that the GPS receiver is synchronous with the GPS time In this case the following message is ...

Page 30: ...rminal software e g on a laptop If once the IPv4 address netmask and IPv4 GATEWAY are configured or the network interface is initialized by IPv6 SCOPE LINK the LANTIME is accessible from any computer in the network remote To set up a TELNET connection the following commands are entered telnet 198 168 10 10 LANTIME IP address user root password timeserver With setup the configuration program is sta...

Page 31: ...time zone will be monitored in the bottom line If the IGNORE LOCK option is enabled an will be shown behind the time LANTIME M900 Ref Time Network Alarm Time Server The multicolor LEDs will reflect the current state of the device Ref Time green the reference clock e g integrated GPS or PZF produce valid time red the reference clock produce no valid time e g not synchronized Time Service green NTP ...

Page 32: ... the NTP and the LINUX kernel version will be displayed ELX800 V5 25f SN 000000000000 NTP 4 2 0b 1 1 Krn 2 6 15 1 The following main menus will be displayed when pressing the UP and DOWN arrow buttons GPS SYN PZF SYN NTP SYN REF GPS UTC 12 00 00 Tue 01 01 2008 Ref Time Time Service Network System Ref Time 1 Ref Time 2 NTP Settings 2nd receiver Time Zone Restart NTP Reboot System Factory Reset Glob...

Page 33: ...sion GPS Position GPS Satellites Receiver Pos LAT 51 9828 LON 9 2258 ALT 176 m Info GPS Status Version GPS Position GPS Satellites Info GPS Status Version GPS Position GPS Satellites GPS170 SYNC GPS170 v2 03 SN 000000000000 OCXO HQ Receiver Pos LAT 51 58 57 N LON 09 13 32 E ALT 176 m Receiver Pos X 3885662 m y 631131 m z 5001761 m SV CONSTELLATION SVs in view 10 Good SVs 10 Sel 04 10 24 13 Ref Tim...

Page 34: ...nd altitude with latitude and longitude displayed in degrees minutes and seconds The next format is geographic too with latitude and longitude displayed in degrees with fractions of degrees The third format displays the receiver position in earth centred earth fixed coordinates ECEF coordinates 34 Receiver Pos LAT 51 9828 LON 9 2258 ALT 176 m Info GPS Status Version GPS Position GPS Satellites Rec...

Page 35: ...meter antenna cable The receiver is able to compensate this delay if the exact cable length is given The default value is 20 m The maximum value that can be entered is 500 m only with low loss cable 35 Info GPS Status Version GPS Position GPS Satellites SV CONSTELLATION SVs in view 10 Good SVs 10 Sel 04 10 24 13 Setup GPS Antenna Length Simulation Mode Init GPS SET ANTENNA CABLE LENGTH OF GPS RECE...

Page 36: ...enabled an will be shown behind the time string in the root menu Menu Init GPS Initiate Cold Boot of GPS Receiver This menu lets the user initialize all GPS data i e all saved satellite data will be cleared The user has to acknowledge this menu again before the initialization starts The system starts operating in the COLD BOOT mode and seeks for a satellite to read its actual parameters 36 Setup G...

Page 37: ...seconds The next format is geographic too with latitude and longitude displayed in degrees with fractions of degrees The third format displays the receiver position in earth centred earth fixed coordinates ECEF coordinates Init Receiver Time If the receiver s on board real time clock keeps a wrong time the receiver is unable to compute the satellites correct elevation angles and Doppler This sub m...

Page 38: ...nd has checked or corrected its on board clock The default setting for all outputs is if sync 38 Enable Outputs Serial Outputs IRIG Output Pulse Outputs ENABLE OUTPUTS Synth always Serial always Pulses always Serial Outputs Setup COM 0 Setup COM 1 Time Zone IRIG Output Code B002 B122 Time UTC Enable Outputs Serial Outputs IRIG Output Pulse Outputs Enable Outputs Serial Outputs IRIG Output Pulse Ou...

Page 39: ...ed to select one of several different types of serial time strings or the capture string for each serial port The following time strings can be selected All time strings are described in the appendix at the end of this documentation Meinberg Standard String GPS Capture String SAT String UNI Erlangen String NMEA String RMC SPA String Computime String Refer to chapter Time Strings for details 39 Ser...

Page 40: ... the year is displayed as wildcards a day of week must be specified Then starting from the configured date daylight saving changes the first day which matches the configured day of week In the figure below October 25th 2008 is a Saturday so the next Sunday is October 26th 2008 All changeover rules for the daylight saving like the first the second the second to last the last Sunday Monday etc in th...

Page 41: ...rsor is positioned on the frequency s units string If the least significant range has been selected valid fractions of the frequency are 0 1 displayed as 1 8 3 displayed as 1 3 5 and 6 displayed as 2 3 Selection of 1 3 or 2 3 means real 1 3 or 2 3 Hz not 0 33 or 0 66 If frequency is set to 0 the synthesizer is disabled The last line of the display lets the user enter the phase of the generated fre...

Page 42: ...t 1 TIMER Out 2 CYCLIC Out 3 PASSIV With the arrow key right or OK Button the parameters of each programmable pulse output can be set Progr Pulses Output 1 Output 2 Output 3 Each programmable pulse output has its own Mode to be set With the arrow keys up and down the mode can be selected POUT1 PASSIV POUT1 TIMER POUT1 SINGLE POUT1 CYCLIC POUT1 PPS POUT1 PPM POUT1 PPH Mode This field selects the mo...

Page 43: ... off time would cause the output to be enabled over midnight For example a program ON Time 10 45 00 OFF Time 9 30 00 would cause an active ouput from 10 45 to 9 30 the next day If one or more of the three switching times are unused just enter the same time into the fields ON Time and OFF Time In this case the switch time does not affect the output Single Pulse Selecting Single Pulse generates a si...

Page 44: ...ever only a cycle times that causes a constant distance between all consecutive pulses make sense For example a cycle time of 1 hour 45 minutes would generate a pulse every 6300 seconds starting from 0 o clock The duration between the last pulse of a day and the first pulse of the next day 0 00 00 o clock would only be 4500 sec PPS PPM PPH Modes POUT1 Pulse Per Sec PPS out activ low L 00 10 sec PO...

Page 45: ...e sync or not sync The next line will reflect the version number the serial number of the PZF5xx and the oscillator type if available Correlation Field 45 Ref Time 1 Ref Time 2 Info PZF Setup PZF Serial Outp Status Version Corr Field Info PZF Setup PZF Serial Outp Status Version Corr Field PZF511 SYNC PZF511 v2 06 SN xxxxxxxxxxxx TCXO HQ Status Version Corr Field PZF STATE CORR 18 State row FIELD ...

Page 46: ...conds after the appearance of CORR xx and the generation of pulses per minute and per second starts Tracking steps of three microseconds are possible each second until the internal real time clock is synchronized two minutes max Afterwards corrections of the time frame are executed per minute only The Field parameter will display the digitized value of the field strength in this menu There is a lo...

Page 47: ...NTP daemon will be restarted automatically Setup Serial Out This menu lets the user configure the baud rate and the framing of the serial RS232 port to one of the following values Baud Rate 300 to 9600 Framing 7E2 8N1 8E1 8O1 COM0 provides a time string once per second once per minute or on request If the on request is activated you have to send the character to get the time string Default COM 960...

Page 48: ...48 ...

Page 49: ...m level of this local clock is set to 12 this ensures that clients recognize the switchover to the local clock and are able to eventually take further actions The local clock can be disabled if the timeserver should not answer anymore when the reference clock is out of order Up to seven additional external NTP servers can be set up to provide a high grade of redundancy for the internal reference c...

Page 50: ...ocal clock can be disabled if the timeserver should not answer anymore when the reference clock is out of order The field Stratum of local clock is used to change the stratum level of the local clock see above default is 12 Menu Reset Time If the time of the reference clock has changed e g while testing with different times the system time has to bet set with the time of the reference clock and th...

Page 51: ... be calculated and if the limit will be reached the internal NTPD will be stopped With the buttons i i OK i g OK from main menu Fall Back Mode can be set to SHS or Redundant mode In SHS mode you can set two different limits If the Warning Level will be reached then a notification will be send If the Critical Level will be reached the internal NTP will be stopped 51 Fallback Mode Redundant Fallback...

Page 52: ...e LINK is up Is the PTP port configured with a valid IP address and netmask Is the Default Gateway configured Check if Multicast enabled your network environment Switch or Router Are there any other PTP Master in your network The stratum value reflects the PTP stratum in a range from 1 to 255 The State will show the current PTP state PTP_MASTER PTP_SLAVE PTP_LISTENING and PTP_PASSIVE The last line...

Page 53: ... of the M900 The PTPv2 TSU cards have their own CPU and its own operating system The PTPv2 software is running on its own processor So it is possible to use more than one PTP TSU card in one system and all the cards have their own network parameters like Hostname Domainname and Nameserver The basic configuration will be done via the front panel all further parameters can be configured via the WEB ...

Page 54: ...ed as a value of power of 2 The parameter Is Slave only will set this PTPv2 TSU card to the PTP slave mode only The network protocol can be toggled between UDP and IP Some basic network parameters like hostname TCP IP address the default Gateway and the DHCP client option can be configured Use the WEB interface or the CLI command line to configure more parameters 54 Gateway 192 168 1 1 DHCP Client...

Page 55: ...rameters will be saved on the flash disk mnt flash config global_configuration and will be reloaded after reboot It is highly recommended not to edit this file manually but to configure the parameters via the several configuration interfaces HTTP CLI or SNMP If this file is not present an empty file will be created See Appendix for the default settings of this file 55 Ref Time Time Service Network...

Page 56: ...E Please be aware of the fact that all SYSLOG entries of the timeserver are stored in var log messages and will be deleted when you power off or reboot the timeserver A daily CRON job is checking for the size of the LANTIME SYSLOG and deletes it automatically if the log size is exceeding a certain limit By specifying one or two remote SYSLOG servers you can preserve the SYSLOG information even whe...

Page 57: ...tor who can provide you with the settings suitable for your specific network If there is a DHCP Dynamic Host Configuration Protocol server available in your network the LANTIME system can obtain its IPv4 settings automatically from this server If you want to use this feature again you should ask your network administrator whether this is applicable in your network you can change the DHCP Client pa...

Page 58: ...once If you enabled the IPv6 protocol the LANTIME always gets a link local address in the format fe80 which is based upon the MAC address of the interface If a IPv6 router advertiser is available in your network and if you enabled the IPv6 autoconf feature your LANTIME will be set up with up to three link global addresses automatically Menu Link Mode With the Link Mode submenu the parameters for l...

Page 59: ...unning NTP daemon and restart it afterwards The command Reboot System reboots the Linux operating system the build in reference clock will not be restarted When Factory Reset is called all system parameters will be reset to initial values However the parameters of each network interface do not change Menu Time Zone The time zone of the time that is shown on the front panel display can be set up he...

Page 60: ...s the first day which matches the configured day of week In the figure below October 25th 2008 is a Saturday so the next Sunday is October 26th 2008 All changeover rules for the daylight saving like the first the second the second to last the last Sunday Monday etc in the x th month can be described by the used format first specified day of week after a defined date If the number of the year is no...

Page 61: ...ia a command line interface CLI which can be used via a TELNET or SSH connection A setup tool can be started after login just type setup and press ENTER at the prompt There are only a few differences between the web interface and the CLI most options are accessible from both interfaces the CLI has no statistical functions The above screenshots show the web interface and the Command Line Interface ...

Page 62: ...y On the second line the systems reports the NTP status During the initial synchronization process a NTP not sync indicates that the NTP system is not synchronized this can also appear if the GPS looses synchronization and the NTP switches back to its LOCAL CLOCK time source The GPS clock is connected to the LANTIME system internally by using a serial connection and additionally by using the secon...

Page 63: ...IPv4 and IPv6 network address of the first network interface and on the right side the serial number the uptime of the system time since last boot and the notification status In the second section the actual status of the GPS and PZF reference clocks and the NTP subsystem is shown additional information about the GPS receiver are also found here This includes the number of satellites in view and t...

Page 64: ...Configuration Ethernet 64 ...

Page 65: ...er A daily CRON job is checking for the size of the LANTIME SYSLOG and deletes it automatically if the log size is exceeding a certain limit By specifying one or two remote SYSLOG servers you can preserve the SYSLOG information even when you need to reboot or switch off the LANTIME In the second section the possible network protocols and access methods can be configured You can enable disable TELN...

Page 66: ...r network the LANTIME system can obtain its IPv4 settings automatically from this server If you want to use this feature again you should ask your network administrator whether this is applicable in your network you can change the DHCP Client parameter to ENABLED In order to activate the DHCP client functionality you can also enter the IP address 000 000 000 000 in the LCD menu by using the front ...

Page 67: ...rameter in this sub section is Netlink mode This controls the port speed and duplex mode of the selected Ethernet port Under normal circumstances you should leave the default setting autosensing untouched until your network administrator tells you to change it High Availability Bonding The standard moniker for this technology is IEEE 802 3ad although it is known by the common names of trunking por...

Page 68: ...tional network parameter like special network routes or alias definitions For this you will edit a script file which will be activated every time after the network configuration will run Also the Samba Configuration from etc samba smb conf can be edited 68 ...

Page 69: ...Configuration Notification 69 ...

Page 70: ...ct to the internal PZF receiver 2 Receiver not sync Internal PZF clock is not synchronised 2 Receiver sync Internal PZF clock is synchronised Antenna faulty GPS antenna disconnected Antenna reconnect GPS antenna reconnected Antenna short circuit GPS detects antenna short circuit Config changed Configuration was changed by a user Leap second announced A leap second has been announced NTP client off...

Page 71: ...ess see SNMP configuration on the Security page VP100 NET wall mount display The VP100 NET wall display is an optional accessory for the LANTIME timeserver it has an own integrated Ethernet port 10 100 Mbit and a SNTP client The time for the display can be received from any NTP server using the SNTP protocol like your LANTIME additionally the display is capable of showing text messages which are s...

Page 72: ...curs This user alarm script will be stored on the Flash Disk at mnt flash user_defined_notification This script will be called with index and the alarm message as text The index value of the test message is 0 NTP Client Monitoring You can monitor a group of NTP clients and supervise the time offset the NTP stratum value and if the client is reachable or not With the button edit client list you can...

Page 73: ...rm messages You can change the alarm message text for every event by using the Edit Messages button the messages are stored in a file mnt flash notification_messages on the flash disk of your timeserver 73 ...

Page 74: ...Configuration Security 74 ...

Page 75: ...isk and can only be reset to the default value timeserver by a factory reset changing all settings back to the factory defaults Please refer to the LCD configuration section in this manual HTTP Access Control With this function you can restrict the access to the web interface and allow only a few hosts to login Only the hosts you entered in the list are able to login to the HTTP HTTPS server of yo...

Page 76: ...first time you connect to a SSH server with an unknown certificate you have to accept the certificate afterwards you are prompted for your password which is configured in the first section of this page If you generate a new SSH key you can copy and paste it into your SSH client configuration afterwards in order to allow you to login without being prompted for a password We strongly recommend to us...

Page 77: ... certificate and accept it if it matches the one stored on the LANTIME All further connections are comparing the certificate with this one which is saved in your web browser configuration Afterwards you are prompted to verify the certificate only when it changed By using the button Generate SSL certificate for HTTP you can create a new certificate Please enter your organisation name mail address a...

Page 78: ... the certificate after changing the hostname The certificates are build with the internal command ntp keygen T ntp keygen is part of the in stalled NTP suite Your LANTIME is using the etc ntp directory for storing its private and public keys this is called the keysdir Please refer to the chapter NTP Autokey for further information below The two options Show NTP MD5 key and Edit NTP MD5 keys allow ...

Page 79: ... after the GPS clock lost its synchronisation The stratum level of this local clock is set to 12 this ensures that clients recognise the switchover to the local clock and are able to eventually take further actions The local clock can be disabled if the timeserver should not answer any more when the reference clock is out of order Because the reference clock is internally connected to the LANTIME ...

Page 80: ...clock has set this flag by default The Prefer flag is usefull if one of the refclocks are not available or out of sync The field Stratum of local clock is used to change the stratum level of the local clock see above default is 12 The Local trusted key field holds a list of all trusted symmetric keys comma or space separated which have to be accepted by the NTPD of your LANTIME If you want to use ...

Page 81: ...anges you made to this file are lost In order to use your custom ntp conf your LANTIME is using a standard version of the NTP software suite therefore all configuration parameters of the NTP software are fully supported you have to edit the file mnt flash ntpconf add which is automatically appended to the etc ntp conf file generated at boot time or when reloading configuration after a change You c...

Page 82: ... conf of a server using this authentication mode may look like this peer configuration for 128 100 100 7 expected to operate at stratum 2 fully authenticated this time peer 128 100 49 105 key 22 suzuki ccie utoronto ca peer 128 8 10 1 key 4 umd1 umd edu peer 192 35 82 50 key 6 lilben tn cornell edu keys mnt flash ntp keys path for key file trustedkey 1 2 14 15 define trusted keys requestkey 15 key...

Page 83: ... which is following in column three There are four different key formats A means DES key with up to eight 7 bit ASCII characters where each character is standing for a key octet this is used by Unix passwords too S is a DES key written in hexadecimal notation where the lowest bit LSB of each octet is used as the odd parity bit If the key format is specified as N it also consists of a hexadecimal s...

Page 84: ...TP server must own a self signed certificate marked as trusted It is good practice to operate the trusted hosts of a secure group at the lowest stratum level of this group b Host One ore more NTP servers which do not own a trusted certificate but only a self signed certificate without this trusted mark c Client One ore more NTP client systems which in contrast to the above mentioned servers do not...

Page 85: ... altered to enable the AUTOKEY feature for the connections to the NTP servers of the group This looks like server time meinberg de autokey version 4 server time2 meinberg de You find the server time meinberg de which is using the AUTOKEY feature while time2 meinberg de is used without any authentic checks If you want to setup the LANTIME server as a trusted host but need to use a different trusted...

Page 86: ...tificate which lacks the trusted mark The clients also hold the group key and a self signed certificate In order to distribute new public keys to the whole group the administrator only has to generate a new t key which will be distributed automatically to the two hosts D and E Because these two servers can now present a unbroken chain of certificates to a trusted host they can be considered truste...

Page 87: ...Configuration Local 87 ...

Page 88: ...he internal flash disc of your LANTIME NTP is using this file to have the parameters for compensation of the incorrectness of the system clock available directly after a restart This results in a faster synchronisation process of the NTPD subsystem after a system restart You should use this function only if the NTPD has been synchronized to the internal reference clock for more than one day This i...

Page 89: ... management clients afterwards User Management For administration different users can be set up 3 group memberships can be assigned to each user the Super User has all properties for administration The group membership Administrator can change all parameters via the command line interface CLI configuartion tool and the WEB interface The group Administrator cannot use any Linux command in a Telnet ...

Page 90: ...3 had flags 4000000 Mar 15 13 35 17 LanGpsV4 ntpd 12948 precision 3 000 usec Mar 15 13 35 17 LanGpsV4 ntpd 12948 kernel time sync status 2040 Mar 15 13 35 17 LanGpsV4 ntpd 12948 frequency initialized 45 212 PPM from etc ntp drift Mar 15 13 38 36 LanGpsV4 lantime 417 NTP sync to GPS Mar 15 13 38 36 LanGpsV4 lantime 417 NTP restart Mar 15 13 45 36 LanGpsV4 proftpd 14061 connect from 172 16 3 2 172 1...

Page 91: ...e read The accuracy of the calculated receiver position and time deviation is dependent on the constellation of the four selected satellites Using the position of the receiver and the satellites a number of values can be calculated which allow a rating of the selected constellation These values are called Dilutions of Precision DOP PDOP is the abbreviation for Position Dilution of Precision TDOP m...

Page 92: ... be uploaded to the LANTIME by first choosing the file on your local computer with the Browse button and then press Start firmware update The chosen file will be uploaded to the LANTIME afterwards you are prompted to confirm the start of the update process The scope of the update only depends on the chosen file 92 ...

Page 93: ...d all configured servers e g SYSLOG servers nameservers are tested for reachability All red colored values should be reviewed by the administrator Because all configured hostnames IP addresses of the servers are processed during the reachability tests the whole check process may take a while 93 ...

Page 94: ...LANTIME Do not press the button again while this process is running some web browsers will cancel the job if you press the button twice After that you can download the packed file config zip to your local computer If you have any questions or problems with your LANTIME please send this file config zip as an attachment of an e mail to Meinberg support and describe your problem Web interface languag...

Page 95: ...Configuration Statistics 95 ...

Page 96: ...ram disk of the LANTIME Both system memory and ram disk have a total capacity of 32 MB each The Uptime parameter displays the time since the last boot process of the unit In the next section all NTP clients accessing the NTP server are listed This list is maintained internally by NTPD clients who did not access the NTPD for a longer period are automatically removed This section can grow very long ...

Page 97: ...ments can be downloaded from here in order to read print them on your workstation The customer notes are a way of storing small pieces of information on your LANTIME for example if you want to keep track of configuration changes and want to comment them you can create a note called config_changes and show or edit it from here If you want to get rid of one of your notes you are able to delete it by...

Page 98: ...g the button add note you have to enter a filename without a directory path all notes are stored in a fixed directory on the flash disk of your LANTIME and the language of your note first After you confirmed these parameters with Add document you are able to edit the text of your new note 98 ...

Page 99: ...n the right side the serial number the uptime of the system time since last boot and the notification status is reported In the second section the actual status of the GPS reference clock and the NTP subsystem is shown additional information about the GPS receiver can also be found here This includes the number of satellites in view and the number of good satellites in view The third section shows...

Page 100: ... the fact that all SYSLOG entries of the timeserver are stored in var log messages and will be deleted when you power off or reboot the timeserver A daily CRON job is checking for the size of the LANTIME SYSLOG and deletes them automatically if their size is exceeding a limit By specifying one or two remote SYSLOG servers you can preserve the SYSLOG information even when you have to reboot or swit...

Page 101: ...al numbers separated by a point Example 192 168 10 2 Additionally you can specify the IPv4 Netmask and your default gateway address Please contact your network administrator who will provide you with the settings suitable for your specific network If you are running a DHCP Dynamic Host Configuration Protocol server in your network the LANTIME system can obtain its IPv4 settings automatically from ...

Page 102: ...r LANTIME will be set up with up to three link global addresses automatically The next parameter in this sub section is Netlink mode This controls the port speed and duplex mode of the selected Ethernet port Under normal circumstances you should leave the default setting autosensing untouched until your network administrator tells you to change it The standard moniker for this technology is IEEE 8...

Page 103: ...NET that is an optional accessory you can obtain from us NTP not sync NTP is not synchronised to a reference time source NTP stopped NTP has been stopped mostly when very large time offsets occur Server boot System has been restarted Receiver not responding No contact to the internal GPS receiver Receiver not sync Internal GPS clock is not synchronised to GPS time Antenna faulty GPS antenna discon...

Page 104: ...llowing The LANTIME hostname and domain name should be known to the SMTP smarthost A valid nameserver entry is needed The domain part of the From address has to be valid Windows Popup Messages Most Microsoft Windows operating systems provide you with a local notification tool You can send messages via the special Windows protocol in your local network It is not necessary to enable the NETBIOS prot...

Page 105: ...by using special software The LANTIME can send an alarm message to one or two VP100 NET displays over the network whenever an event occurs for which you selected the display notification type An alarm message is shown three times as a scrolling message Just enter the display s IP address and its serial number this is used for authorization which can be found by pressing the red SET button on the b...

Page 106: ...he time offset the NTP stratum value and if the client is reachable or not With the button edit client list you can edit the list of clients to monitor You can add the TCP IP address or the hostname of the client You can monitor the current states of the configured clients 106 ...

Page 107: ...rk The actual LANTIME version supports SSH1 and SSH2 over IPv4 and IPv6 In order to use this feature you have to enable the SSHD subsystem and a security key has to be generated on the timeserver by using the Generate SSH key button Afterwards a SSH client can connect to the timeserver and opens a secure shell ssh root 192 168 16 111 The first time you connect to a SSH server with an unknown certi...

Page 108: ...nerate SSL certificate for HTTP you can create a new certificate Please enter your organisation name mail address and the location in the upcoming form and press Generate SSL certificate to finally generate it NTP keys and certificates The fourth and fifth section of the Security page allow you to create the needed crypto keys and certificates for secure NTP operation please see NTP authentication...

Page 109: ...erence clock is internally connected to the LANTIME system by using a serial connection the accuracy using this way of synchronisation is around 1 ms The high accuracy of the LANTIME timeserver around 10 microseconds is available by using the ATOM driver of the NTP subsystem which is directly interpreting the PPS pulse per second of the GPS reference clock The default configuration looks like this...

Page 110: ...CLI NTP Authentication Please see the corresponding chapter in the web interface description CLI NTP Autokey Please see the corresponding chapter in the web interface description 110 ...

Page 111: ...The function Send test notification is generating a test alarm message and sends it using all configured notify possibilities e mail WMail SNMP Traps wall mount display You can use the function Save NTP drift file to copy the file etc ntp drift to the internal flash disc of your LANTIME NTP is using this file to have the parameters for compensation of the incorrectness of the system clock availabl...

Page 112: ...ership Administrator can change all parameters via the command line interface CLI configuartion tool and the WEB interface The group Administrator cannot use any Linux command in a Telnet SSH or Terminal session If the Administrator will login the setup program will be started directly After termination of the Setup program this user will be logout automatically The group membership Info has the s...

Page 113: ...me and date of the last update of the shown parameters Next you find the GPS receiver status and the NTP status followed by the GPS position data The position uses the Latitude Longitude Altitude format Latitude and Longitude are shown in degrees minutes and seconds Altitude is shown in meters above sea level The satellite section shows the numbers of satellites in view and the number of usable sa...

Page 114: ...s ascending positive values or descending negative value Software Update If you need to update the software of your LANTIME you need a special file update tgz from Meinberg which has to be uploaded to the LANTIME by using ftp SCP or SFTP to the root dir update tgz after the file transfer is complete press Start firmware update Afterwards you are prompted to confirm the start of the update process ...

Page 115: ...is feature The elements objects variables are organised in data structures called Management Information Base MIB The LANTIME includes the standard NET SNMP MIB and is based on SNMPv1 RFC 1155 1157 SNMPv2 RFC 1901 1908 and SNMPv3 The following SNMP version is installed on the timeserver Net SNMP Version 5 0 8 Network transport support Callback Unix TCP UDP TCPIPv6 UDPIPv6 SNMPv3 Security Modules u...

Page 116: ...1 mbgLtRefclock mbgLtRefGpsPosition 0 GPS Position 51 9834 9 2259 181m mbgLtRefclock mbgLtRefGpsSatellites 0 GPS Satellites 06 06 mbgLtRefclock mbgLtRefGpsSatellitesGood 0 6 mbgLtRefclock mbgLtRefGpsSatellitesInView 0 6 mbgLtRefclock mbgLtRefPzfState 0 PZF State N A mbgLtRefclock mbgLtRefPzfStateVal 0 0 mbgLtRefclock mbgLtRefPzfKorrelation 0 0 mbgLtRefclock mbgLtRefPzfField 0 0 Please note that yo...

Page 117: ...c The timeserver specific MIB files must be present on the clients they have to be included in the SNMP setup of the client software a and b can be achieved by using the web interface or the shell access please see the appropriate chapters in this manual The mentioned MIB files can be found directly on the timeserver located at usr local share snmp mibs All files with names starting with MBG SNMP ...

Page 118: ... SNMP LANTIME CFG MIB mbgLtCfghostname 0 STRING helloworld root testhost Please note that your SNMP request has to be sent with a sufficient timeout in the above snmpset example this was achieved by using the t 10 option choosing a timeout of 10 seconds because after each parameter change the timeserver reloads its configuration which takes a few seconds The request is acknowledged by the SNMP age...

Page 119: ...Send special timeserver commands with SNMP The timeserver is capable of receiving special commands by SNMP in order to reboot the unit or reload its configuration after you manually changed it A special SNMP variable is reserved for this mbgLtCmdExecute and has to be set to a special integer value for each command The following commands are available Reboot 1 Setting the mbgLtCmdExecute variable t...

Page 120: ...CmdExecute 0 INTEGER Reboot 1 root testhost The command shown above is forcing the timeserver to reboot Instead of using the integer value you may also enter the command name as it is defined in the MIB file MBG SNMP LANTIME CMD txt and in the command list above If you want the timeserver to reload it s configuration file which you previously uploaded via FTP probably you would enter this command ...

Page 121: ... or hostname IP address or hostname of first syslog server mbgLtCfgSyslogserver2 string IPv4 or IPv6 address or hostname IP address or hostname of second syslog server mbgLtCfgTelnetAccess integer 0 disabled 1 enabled Telnet access activated mbgLtCfgFTPAccess integer 0 disabled 1 enabled FTP access activated mbgLtCfgHTTPAccess integer 0 disabled 1 enabled Webinterface activated mbgLtCfgHTTPSAccess...

Page 122: ...SNMP Traps to the first host mbgLtCfgSNMPTrapReceiver2 string IPv4 or IPv6 address or hostname Second host which receives notifications sent as SMTP traps mbgLtCfgSNMPTrapReceiver2Commu nity string The SNMP community used when sending SNMP Traps to the second host mbgLtCfgSNMPROCommunity string The SNMP community which has read only access and therefore can be used to only monitor status variables...

Page 123: ...CfgEthernetIf0IPv4IP string IPv4 IP address IPv4 address of first network interface of the timeserver mbgLtCfgEthernetIf0IPv4Netm ask string IPv4 Netzmaske IPv4 netmask of first network interface of the timeserver mbgLtCfgEthernetIf0IPv4Gate way string IPv4 IP address IPv4 address of the default gateway of the timeservers first network interface mbgLtCfgEthernetIf0DHCPCli ent integer 0 disabled 1 ...

Page 124: ...interface see Local page Download MIB files button after unpacking the archive file you can import the MIB files into your management system The following SNMP traps are available NTP not sync NTP not synchronised to refclock NTP stopped NTP stopped Server boot System has rebooted Receiver not responding no answer from GPS Receiver not sync GPS receiver not synchronised Antenna faulty GPS antenna ...

Page 125: ...condition mbgLtTrapServerBoot mbgLtTraps 3 After finishing the boot process this trap is generated mbgLtTrapReceiverNotResponding mbgLtTraps 4 Trap to be sent when the internal receiver of the timeserver is not responding mbgLtTrapReceiverNotSync mbgLtTraps 5 If the internal receiver looses sync the SNMP trap receivers will receive this trap mbgLtTrapAntennaFaulty mbgLtTraps 6 This trap will be se...

Page 126: ...of explosion if the lithium battery is replaced incorrectly Only identical batteries or batteries recommended by the manufacturer must be used for replacement The waste battery has to be disposed as proposed by the manufacturer of the battery Technical Specifications LANTIME BGT HOUSING Metal 19 Modular chassis Schroff EUROPAC lab HF Front panel 3U 84HP 128 mm high 426 mm wide PROTECTION RATING IP...

Page 127: ...with a higher pollution degree more stringent requirements are applicable o The building in equipment may not be opened o Protection against fire must be assured in the end application o The ventilation opening may not be covered o The equipment building in equipment was evaluated for use in a maximum ambient temperature of 40 C o For safe operation the building in equipment must be protected by m...

Page 128: ...l line 10 MHz Out BNC TTL shielded coaxial line Antenna GPS Coax type N 35 4 MHz 10 MHz shielded coaxial line Antenna PZF BNC 77 5kHz shielded coaxial line Power supply power cord receptacle see chapter power supply cord power supply Optional Outputs Time Code IRIG B AM Out BNC 3 0Vpp into 50 Ohm shielded coaxial line DCLS Out BNC 2 5Vpp into 50 Ohm shielded coaxial line PPS PPM PPH progr Pulse Sy...

Page 129: ...nnection it possible to configure parameters with the command line interface You have to use a NULL MODEM cable connecting to your PC or Laptop computer You can use e g the standard Hyperterminal program shipped with your Windows operating system Configure your terminal program with 38400 Baud 8 Databits no parity and 1 Stopbit The terminal emulation have to set to VT100 After connecting to the ti...

Page 130: ...relay can be switched by one of the notification conditions In the notification condition table via WEB or CLI interface you can select the relay out The priority is on the TIME SYNC ERROR signal of the receiver refclock not sync Relay state which will be set via notification conditions will be reseted by any access via the WEB or CLI interface if no TIME SYNC ERROR is active Technical Specificati...

Page 131: ... valid almanac 12 minutes if invalid battery buffered memory PULSE OUTPUTS Change of second P_SEC TTL level Change of minute P_MIN TTL level ACCURACY OF PULSES Better than 250 nsec after synchronization and 20 minutes of operation Better than 2 µsec during the first 20 minutes of operation FREQUENCY OUTPUTS 10 MHz TTL level SERIAL PORTS 3 asynchronous serial ports RS 232 COM0 fixed internal used C...

Page 132: ... 0 1 Hz Note 1 5 10 10 5 mHz Note 1 accuracy G PS synchronous averaged 24 h 1 10 11 1 10 11 5 10 12 1 10 12 1 10 12 1 10 12 accuracy of time free run one day 8 6 msec 1 8 m sec 130µsec 44 µsec 10 µsec 1 8 µsec accuracy of time free run one year 32 sec 13 sec 3 5 sec 1 6 sec 300 msec 16 msec temperature dependant drift fr ee run 1 10 6 20 70 C 2 10 7 0 60 C 5 10 8 20 70 C 1 10 8 5 70 C 2 10 10 5 70...

Page 133: ...42 MHz Bandwidth 9 MHz CONVERTER Local oscillator to converter frequency 10 MHz First IF frequency 35 4 MHz POWER REQUIREMENTS 12 V 18 V 100 mA provided via antenna cable CONNECTOR Coax type N female AMBIENT TEMPERATURE 40 65 C HOUSING ABS plastic case for outdoor installation IP56 PHYSICAL DIMENSION 133 ...

Page 134: ... out 12a 10 MHz frequency output TTL level F_SYNTH 21c Synthesizer output TTL level F_SYNTH_OD 22c Synthesizer output Open Drain max sink current to GND 150 mA F_SYNTH_SIN 23c Synthesizer output sine wave 1 5 V eff TIME_SYN 19c TTL output HIGH level if synchronization has been achieved LOW level after reset or in case of serious errors e g antenna faulty CAPx 27c 28c Time capture inputs TTL captur...

Page 135: ...rogPulse1 out 12 10 MHz out ProgPulse2 out 13 SCL 14 SCL_EN 15 COM2 RxD in SDA 16 COM2 TxD out reserved P3 2 17 COM3 RxD in DCF_MARK out 18 COM3 TxD out reserved Vref TxD2 TTL 19 GND TIME_SYN out 20 GND reserved P2 3 21 GND F_SYNTH out 22 GND F_SYNTH_OD out 23 GND F_SYNTH_SIN out 24 GND COM1 TxD out 25 GND 26 GND COM0 TxD out 27 GND CAP1 in 28 GND CAP0 in 29 GND COM1 RxD in 30 GND COM0 RxD in 31 G...

Page 136: ...OUTPUTS Active high and active low pulses per minute and per second TTL level pulse duration 200 ms ACCURACY OF PULSES Time delay of two systems PZF5xx with a maximum distance of 50 km typ 20 µs max 50 µs Time shifting of successive pulses max 1 5 µs PROPAGATION TIME COMPENSATION The signal delay is compensated if the distance of the receiver to the transmitter is given STANDARD FREQUENCIES 10 MHz...

Page 137: ...ANTENNA Ferrite antenna in plastic housing HUMIDITY Relativ humidity 85 max TEMPERATURE RANGE 0 60 Celsius POWER SUPPLY 5 V approx 330 mA 137 ...

Page 138: ...10 kHz frequency output TTL level 100 kHz out 10a 100 kHz frequency output TTL level 1 MHz out 11a 1 MHz frequency output TTL level 10 MHz out 12a 10 MHz frequency output TTL level F_SYNTH out 21c Synthesizer frequency TTL level F_SYNTH_OD out 22c Synthesizer frequency open drain F_SYNTH_SIN out 23c Synthesizer frequency sinewave COM0 TxD out 26c COM0 RS 232 output COM0 RxD in 30c COM0 RS 232 inpu...

Page 139: ... P_MIN out 9 RESET in out 10 100 kHz out 77 5 kHz out 11 1 MHz out 155 kHz out 12 10 MHz out 310 kHz out 13 SCL 14 SCL_EN 15 SDA 16 17 reserved 18 19 TIME_SYN out 20 21 F_SYNTH out 22 F_SYNTH_OD out 23 F_SYNTH_SIN out 24 COM1 TxD out 25 26 COM0 TxD out 27 reserved 28 reserved 29 COM1 RxD in 30 COM0 RxD in 31 32 GND GND DIN 41612 connector Typ C 64 row a c 139 ...

Page 140: ...le connector three RS232 male connector according to DIN 41612 type C 96 only TxD RxD DCD PARALLEL INTERFACE One LPT Port male connector type C 96 VGA CONNECTION 10 pol pin contact strip KEYBOARD CONNECTION 10 pol pin contact strip STATE LEDs power supply Connect Activity and Speed of the network connection POWER REQUIREMENTS 5 V 5 1 A FRONTPANEL 3 HE 4 TE 128 mm high x 20 3 mm wide CONNECTOR Acco...

Page 141: ...n 15 DRQ in IOW out IOR out 16 D15 in out D0 in out D14 in out Primary IDE 17 D1 in out D13 in out D2 in out 18 D12 in out D3 in out D11 in out 19 D4 in out D10 in out D5 in out 20 D9 in out D7 in out 21 D6 in out D8 in out HDRST out 22 GND GND GND 23 Rx in Tx out Tx out 24 Rx in LED LINK out LED ACTIVITY out Ethernet 25 LED SPEED 100M out LED SPEED10M out 26 GND GND GND 27 RxD4 in TxD4 out DCD4 i...

Page 142: ...of the 12V outputs should be smaller than 4 100 mA OUTPUT POWER Max 35 W TYPE OF CONNECTOR Male connector according to DIN 41612 type H15 pre mating protective contact MOUNTING FRAME 19 module 3U 9HP 128 mm high x 45 mm wide according to DIN 41494 part 5 EMC conform to EN 60950 Front Panel and Rear Connector Pin Assignments d z 32 30 28 26 24 22 20 18 16 14 12 10 8 6 4 GND 1 Vout 1 Vout 1 GND 1 GN...

Page 143: ... in use The board GPS167 TC however generates the IRIG B AFNOR NFS 87 500 code as well as IEEE1344 code which is an IRIG B123 coded extended by information for time zone leap second and date Other formats may be available on request Principle of Operation The Board GPS167 TC has been designed for the generation of IRIG AFNOR and IEEE1344 standard time codes Apart from the digitally generated ampli...

Page 144: ...IRIG Standard Format 144 ...

Page 145: ...AFNOR Standard Format 145 ...

Page 146: ...ime set during daylight saving time 64 Timezone Offset Sign sign of TZ offset 0 1 65 TZ Offset binary encoded 1 Offset from IRIG time to UTC time Encoded IRIG time plus TZ Offset equals UTC at all times 66 TZ Offset binary encoded 2 67 TZ Offset binary encoded 4 68 TZ Offset binary encoded 8 69 Position Identifier P7 70 TZ Offset 0 5 hour set if additional half hour offset 71 TFOM Time figure of m...

Page 147: ...ht saving and leap second in control functions CF segment also see table Assignment of CF segment in IEEE1344 mode Selection of Generated Time Code The time code to be generated can be selected by Menu Setup IRIG settings or the GPS Monitorprogram DC Level Shift Codes PWM signal B00x and modulated sine wave carrier B12x are always generated simultaneously Both signals are provided at the VG64 Conn...

Page 148: ...50 Ω The encoding is made by the number of MARK amplitudes during ten carrier waves The following agreements are valid a binary 0 2 MARK amplitudes 8 SPACE amplitudes b binary 1 5 MARK amplitudes 5 SPACE amplitudes c position identifier 8 MARK amplitudes 2 SPACE amplitudes PWM DC Output The pulse width modulated DC signals shown in the diagramms IRIG and AFNOR standard format are coexistent to the...

Page 149: ...h mm ss the current time hh hours 00 23 mm minutes 00 59 ss seconds 00 59 or 60 while leap second uv clock status characters u clock has not synchronized after reset space 20h clock has synchronized after reset v different for DCF77 or GPS receivers DCF77 clock currently runs on XTAL GPS receiver has not checked its position space 20h DCF77 clock is sync d with transmitter GPS receiver has determi...

Page 150: ...hereas the other characters are part of the time string The groups of characters as defined below x 0 or 1 corresponding on the number of the capture input _ ASCII space 20h dd mm yy the capture date dd day of month 01 31 mm month 01 12 yy year of the century 00 99 hh mm ss fffffff the capture time hh hours 00 23 mm minutes 00 59 ss seconds 00 59 or 60 while leap second fffffff fractions of second...

Page 151: ...01 12 yy year of the century 00 99 w the day of the week 1 7 1 Monday hh mm ss the current time hh hours 00 23 mm minutes 00 59 ss seconds 00 59 or 60 while leap second xxxx time zone indicator UTC Universal Time Coordinated formerly GMT MEZ European Standard Time daylight saving disabled MESZ European Summertime daylight saving enabled u clock status characters clock has not synchronized after re...

Page 152: ...time hh hours 00 23 mm minutes 00 59 ss seconds 00 59 or 60 while leap second v sign of the offset of local time zone related to UTC oo oo offset of local time zone related to UTC in hours and minutes ac clock status characters a clock has not synchronized after reset space 20h clock has synchronized after reset c GPS receiver has not checked its position space 20h GPS receiver has determined its ...

Page 153: ...cter 20h n latitude the following characters are possible N north of equator S south d equator lll llll longitude of receiver position in degrees leading signs are replaced by a space character 20h e longitude the following characters are possible E east of Greenwich W west of Greenwich hhhh altitude above sea level in meters leading signs are replaced by a space character 20h ETX End Of Text ASCI...

Page 154: ...s 00 23 mm minutes 00 59 ss seconds 00 59 or 60 while leap second ss fractions of seconds 1 10 1 100 A Status A time data valid V time data not valid bbbb bb latitude of receiver position in degrees leading signs are replaced by a space character 20h n latitude the following characters are possible N north of equator S south d equator lllll ll longitude of receiver position in degrees leading sign...

Page 155: ...ereas the other characters are part of the time string The groups of characters as defined below yy mm tt the current date yy year of the century 00 99 mm month 01 12 dd day of month 01 31 _ Space ASCII code 20h hh mm ss fff the current time hh hours 00 23 mm minutes 00 59 ss seconds 00 59 or 60 while leap second fff milliseconds 000 999 cc Check sum EXCLUSIVE OR result of the previous characters ...

Page 156: ... by ASCII numbers whereas the other characters are part of the time string The groups of characters as defined below T Start character sending with one bit occuracy at change of second jj mm tt the current date jj year of the century 00 99 mm month 01 12 tt day of month 01 31 ww day of week 01 07 01 monday hh mm ss the current time hh hours 00 23 mm minutes 00 59 ss seconds 00 59 oder 60 wenn Scha...

Page 157: ...e other characters are part of the time string The groups of characters as defined below X Control character code 58h sending with one bit accuracy at change of second G Control character code 47h U Control character code 55h yymmdd the current date yy year of the century 00 99 mm month 01 12 dd day of month 01 31 hh mm ss the current time hh hours 00 23 mm minutes 00 59 ss seconds 00 59 or 60 whi...

Page 158: ...in italics are replaced by ASCII numbers whereas the other characters are part of the time string The groups of characters as defined below SOH Start of Header ASCII control character sending with one bit accuracy at change of second ddd day of year 001 366 hh mm ss the current time hh hours 00 23 mm minutes 00 59 ss seconds 00 59 or 60 while leap second q Quality indicator space Time Sync GPS loc...

Page 159: ...richtungen Limits and methods of measurement of radio interference characteristics of information technology equipment EN55024 1998 Grenzwerte und Messverfahren für Störfestigkeit von A1 2001 A2 2003 informationstechnischen Einrichtungen Limits and methods of measurement of Immunity characteristics of information technology equipment EN 60950 2001 Sicherheit von Einrichtungen der Informationstechn...

Page 160: ...ugging info on stdout help Show help message Defining messages a Static or flashing text You can define a maximum of 9 lines for a message Start with x text where x represents the line number 1 line1 text Set text for line 1 2 line2 text Set text for line 2 You can set the duration and mode for each line separately Specifiy the following options directly after the text definition of a line f nofla...

Page 161: ...rror Examples send2display h 172 16 3 251 s 0a03007f m1 e2 1 Hello World d5 2 what a nice day d3 shows two lines of text 2 times 1st line is shown for 5 seconds and 2nd line for 3 seconds send2display h 172 16 3 251 s 0a03007f m1 e1 1 Oops H2 M30 shows one line of text every 2 hours and 30 minutes a sound beep can be heared while the message is displayed send2display h 172 16 3 251 s 0a03007f c1 d...

Page 162: ...ve BOOL 1 NTP Section External NTP Server 1 IP ASCII 50 External NTP Server 1 KEY NUM External NTP Server 1 AUTOKEY BOOL External NTP Server 2 IP ASCII 50 External NTP Server 2 KEY NUM External NTP Server 2 AUTOKEY BOOL External NTP Server 3 IP ASCII 50 External NTP Server 3 KEY NUM External NTP Server 3 AUTOKEY BOOL NTP Stratum Local Clock NUM 0 15 12 NTP Trusted Key NUM NTP AUTOKEY feature activ...

Page 163: ...tenna_faulty CASE Notification on Antenna_reconnect CASE Notification on Config_changed CASE Notification on Leap second announ CASE Ethernet Parameter Section ETH0 IPv4 TCPIP address IP 0 ETH0 IPv4 NETMASK IP 0 ETH0 DHCP CLIENT BOOL 1 ETH0 IPv6 TCPIP address 1 IP ETH0 IPv6 TCPIP address 2 IP ETH0 IPv6 TCPIP address 3 IP ETH0 IPv6 Autoconf BOOL 1 ETH0 Net Link Mode NUM 0 4 ETH0 Bonding Group NUM 0...

Page 164: ...e internet allowing you to download the most actual version Please note that we have to charge you for any incurred expenses if you choose to receive the source code on data media Operating System GNU Linux The distribution of the GNU Linux operating system is covered by the GNU General Public License GPL which we included below More information about GNU Linux can be found on the GNU website www ...

Page 165: ... free provided as long as the following notice appears in the documentation Copyright 2000 by Jef Poskanzer jef acme com All rights reserved Redistribution and use in source and binary forms with or without modification are permitted provided that the following conditions are met 1 Redistributions of source code must retain the above copyright notice this list of conditions and the following discl...

Page 166: ...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 mo...

Page 167: ...t 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 ...

Page 168: ...nd 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 otherw...

Page 169: ...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 PARTIES PROVIDE THE PROGRAM AS IS WITHOUT WARRANTY OF...

Page 170: ...FC 1119 University of Delaware September 1989 Mills90 Mills D L Network Time Protocol Version 3 specification implementation and analysis Electrical Engineering Department Report 90 6 1 University of Delaware June 1989 Kardel Frank Gesetzliche Zeit in Rechnernetzen Funkuhren Zeitsignale und Normalfrequenzen Hrsg W Hilberg Verlag Sprache und Technik Groß Bieberau 1993 Kardel Frank Verteilte Zeiten ...

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