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Reference

[Mills88]

Mills, D. L., "Network Time Protocol (Version 1) - specification and implementation",

DARPA Networking Group Report RFC-1059, University of Delaware, July 1988

[Mills89]

Mills, D. L., "Network Time Protocol (Version 2) - specification and implementation",

DARPA Networking Group Report RFC-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", ix Multiuser-Multitasking-Magazin, Heft 2/93, Verlag

Heinz Heise, Hannover 1993

153

Содержание LANTIME

Страница 1: ...Technical Information Operating Instructions LANTIME SHSPZF ETX BGT...

Страница 2: ...mation Meinberg Funkuhren GmbH Co KG Auf der Landwehr 22 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 8...

Страница 3: ...tion 16 GPS satellite controlled clock 18 GPS167 Features 19 Time Zone and Daylight Saving 19 Mounting the GPS Antenna 20 Assembly with CN UB E 21 Antenna Short Circuit 21 General information DCF77 PZ...

Страница 4: ...CK 40 INITIATE COLD BOOT 41 INITIATE WARM BOOT 41 ANTENNA CABLE 41 Resetting Factory Defaults of the GPS 41 Front panel PZF509 42 Pilot lamps 42 Display 42 Control keys 42 PZF Menu items 43 The LANTIM...

Страница 5: ...Automatic configuration check 75 Get Diagnostics Information 76 Web interface language 76 Configuration Statistics 77 Statistical Information 78 Configuration Manual 79 The Command Line Interface 81 C...

Страница 6: ...SUB D Connector Assignments 111 Technical Specifications GPS167 112 Accuracy of frequency TCXO quartz standard 113 Technical Specifications GPS167 Antenna 114 Signal Description GPS167 115 Rear Connec...

Страница 7: ...otocol Version 4 NTP 139 mini_httpd 139 GNU General Public License GPL 140 Timecode option 144 Abstract 144 Principle of Operation 144 Block Diagram Timecode 144 IRIG Standard Format 145 AFNOR Standar...

Страница 8: ...time limit the max accepted time difference between GPS and PZF has to be set to the needed accuracy default 10 ms SHS State act Diff 1ms GPS sync PZF sync SETUP LAN PARAMETERS TCP IP ADDR DHCP 0 0 0...

Страница 9: ...rams and high accuracy pulse per second PPS signals from two independent primary time sources The time telegrams and the PPS signals output by the clocks are compared against each other If either the...

Страница 10: ...the limit the time information is passed to the NTP server but the status included is set to not synchronized The NTP server keeps accepting the time information for a given trust time after the trus...

Страница 11: ...nue to synchronize to the LANTIME with worse stratum This way it is guaranteed that all the client devices on the network operate using the same system time All changes of the reception status of one...

Страница 12: ...and the default gateway have to be configured from the front panel of LANTIME The network address or the equivalent name of LANTIME has to be shown to all NTP clients in the TCP IP network As well as...

Страница 13: ...Network Time Protocol SNTP TIME SNMP v1 2 3 with extended SNMP Agent and SNMP Traps for NTP and refer ence clock status DHCP Client NFS TELNET FTP HTTP HTTPS with Openssl2 SSH2 Secure Shell Login Alar...

Страница 14: ...ser 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 operat...

Страница 15: ...ronization of hardware clocks in local und 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...

Страница 16: ...system will be collected and the corresponding make files will be generated in the subdirectories After that the NTP daemon and all needed utilities will be generated Therefore type make While compil...

Страница 17: ...0 60 1 15875 with the following meaning remote list of all valid time servers ntp conf refid reference number st actual stratum value hierarchy level when last request seconds poll period of requestin...

Страница 18: ...ites to the user s receiver A nominal constellation of 21 satellites together with 3 active spares in six orbital planes 20000 km over ground provides a minimum of four satellites to be in view 24 hou...

Страница 19: ...tes navigation messages increases the accuracy of the board s TCXO or OCXO to 10 9 and automatically compensates the oscillators aging The last recent value is restored from the battery buffered memor...

Страница 20: ...ll mounting and clamps for pole mounting are added to every GPS167 A standard coaxial cable with 50 impedance should be used to connect the antenna converter unit to the receiver The maximum length of...

Страница 21: ...ase of an antenna line short circuit the following message appears in the display ANTENNA SHORT CIRCUIT DISCONNECT POWER If this message appears the clock has to be disconnected from the mains and the...

Страница 22: ...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 car...

Страница 23: ...ormation concerning date time and status two independent serial interfaces RS232 are used which are configurable in a setup menu Like mentioned before the PZF5xx includes a battery backed real time cl...

Страница 24: ...s own is no guarantee for good conditions of reception because interfering signals within the bandwidth of the receiver also have an effect on the displayed value The maximum interference immunity can...

Страница 25: ...iver s oscillator has warmed up and operates with the required accuracy If the receiver finds valid almanac and ephemeris data in its battery buffered memory and the receiver s position has not change...

Страница 26: ...nces are usually the RTC of the single board computer the serial time string and the pulse per second PPS from the hybridsystem If the NTPD is started but not synchronous with the hybridsystem yet the...

Страница 27: ...nce the IPv4 address netmask and IPv4 GATEWAY are configured or the network interface is initialised by IPv6 SCOPE LINK the LANTIME is accessible from any computer in the network remote To set up a TE...

Страница 28: ...t the user select the desired menu The next chapter lists all available menus in detail A quick reference of the available menus and submenus can be found at the end of this document MENU Key This key...

Страница 29: ...g the menu with MENU all changes are discarded and the setup menu is displayed again All changed settings of the LAN PARAMETER s sub menu come into affect not before MENU is pressed once again and the...

Страница 30: ...are monitored If the IGNORE LOCK option is enabled an will be shown behind the time If the NEXT key is pressed from the root menu a submenu is displayed showing the receiver s software revision of th...

Страница 31: ...t error has settled itself Generating time strings again starts not before the acknowledgement took place SHS STATE DIFF 1ms GPS sync PZF sync Note As long as both of the two LEDs FAIL and LOCK blink...

Страница 32: ...he geometric constellation Those values can be displayed in a submenu of the SV constellation menu PDOP is the position dilution of precision TDOP is the time dilution of precision and GDOP computed f...

Страница 33: ...ecision Once edit mode has been entered the NEXT key lets the cursor move to the digit or letter to be edited whereas the INC key increments the digit or letter under the cursor If changes have been m...

Страница 34: ...CONNECT you can enable or disable all network connections via TELNET FTP or HTTP When the network parameters have been changed the configuration file is updated and the NTPD is restarted SETUP LAN PA...

Страница 35: ...ILL AJUST in the range of 0 to 4095 If the edited value exceeds 4095 the maximum value is stored This menu only lets the user modify the coarse DAC CAL The fine DAC FINE is displayed but not to edit I...

Страница 36: ...SETUP PZF PARAMETERS TIME The menu TIME lets the user edit the date and the day of week of the PZF509 radio clock SETUP PZF PARAMETERS DATE 36...

Страница 37: ...how to enter parameters in both cases If the number of 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...

Страница 38: ...this a restart should be done SETUP DAYLIGHT SAV ON DAYLIGHT SAV ON Date 26 03 2000 Day of week Time 2 00 00 SETUP DAYLIGHT SAV OFF DAYLIGHT SAV OFF Date 26 03 2000 Day of week Time 2 00 00 SETUP TIME...

Страница 39: ...e Time string will be send to next change of minute On Request Time string will be send if an will be send to this port SETUP SERIAL PORT SERIAL PORT PARM 9600 8N1 MODE Per second SETUP SERIAL STRING...

Страница 40: ...g the information from the satellites When the antenna is disconnected it is possible to set the LANTIME with any time Note that the NTP will not synchronize to a GPS losing its reception or if the de...

Страница 41: ...he system changes into COLD BOOT to read new data s SETUP INIT WARM BOOT Are you sure Press INC YES MENU NO ANTENNA CABLE This menu asks the user to enter the length of the antenna cable The received...

Страница 42: ...k to DCF time This condition occures for at most two minutes after switching on the PZF509 because two DCF telegrams are checked for plausibility before the data is taken over Short disturbance of rec...

Страница 43: ...l the receiver enters the state of fine correlation The system tries to lock the received PZF as exact as possible to generate a precise time frame The display shows the correlation coefficient at the...

Страница 44: ...a 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 b...

Страница 45: ...splay the time and time zone can be found below that you will find the date and weekday On the second line the systems reports the NTP status During the initial synchronisation process a NTP not sync...

Страница 46: ...the 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...

Страница 47: ...Configuration Ethernet 47...

Страница 48: ...r 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 prese...

Страница 49: ...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 yo...

Страница 50: ...ting 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...

Страница 51: ...ional 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...

Страница 52: ...Configuration Notification 52...

Страница 53: ...lock is not synchronised to GPS time Antenna faulty GPS antenna disconnected Antenna reconnect GPS antenna reconnected Config changed Configuration was changed by a user Leap second announced A leap s...

Страница 54: ...ssory 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 LAN...

Страница 55: ...is 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...

Страница 56: ...Configuration Security 56...

Страница 57: ...sk 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...

Страница 58: ...rst 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...

Страница 59: ...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 yo...

Страница 60: ...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...

Страница 61: ...isation 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...

Страница 62: ...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 Loc...

Страница 63: ...nges 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 a...

Страница 64: ...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 suzuk...

Страница 65: ...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 pa...

Страница 66: ...P 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 serve...

Страница 67: ...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 me...

Страница 68: ...ificate 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...

Страница 69: ...Configuration Local 69...

Страница 70: ...e 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 faste...

Страница 71: ...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...

Страница 72: ...12948 precision 3 000 usec Mar 15 13 35 17 LanGpsV4 ntpd 12948 kernel time syncstatus 2040 Mar 15 13 35 17 LanGpsV4 ntpd 12948 frequency initialized 45 212 PPM from etc ntp drift Mar 15 13 38 36 LanGp...

Страница 73: ...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...

Страница 74: ...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...

Страница 75: ...all configured servers e g SYSLOG servers nameservers are tested for reachability All red coloured values should be reviewed by the administrator Because all configured hostnames IP addresses of the...

Страница 76: ...antime 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 lo...

Страница 77: ...Configuration Statistics 77...

Страница 78: ...am 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 cl...

Страница 79: ...ents 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 tra...

Страница 80: ...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 con...

Страница 81: ...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 s...

Страница 82: ...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 automati...

Страница 83: ...ple 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 speci...

Страница 84: ...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...

Страница 85: ...WINDOWS POPUP MESSAGE sends a Winpopup message to one or two different computers and DISPLAY shows the alarm message on a wall mount display model VP100 NET that is an optional accessory you can obtai...

Страница 86: ...u can specify the e mail address which is used as the senders address of the notification e mail From address the e mail address of the receiver To address and a SMTP smarthost that is a mail server w...

Страница 87: ...is an optional accessory for the LANTIME timeserver it has an own integrated Ethernet port 10 100 Mbit and a SNTP client The time of the display can be received from any NTP server using the SNTP pro...

Страница 88: ...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 u...

Страница 89: ...erate 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 gen...

Страница 90: ...rence 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...

Страница 91: ...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 91...

Страница 92: ...he 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 NT...

Страница 93: ...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 Termi...

Страница 94: ...e 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 forma...

Страница 95: ...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...

Страница 96: ...s 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 SNM...

Страница 97: ...1 mbgLtRefclock mbgLtRefGpsPosition 0 GPS Position 51 9834 9 2259 181m mbgLtRefclock mbgLtRefGpsSatellites 0 GPS Satellites 06 06 mbgLtRefclock mbgLtRefGpsSatellitesGood 0 6 mbgLtRefclock mbgLtRefGpsS...

Страница 98: ...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 acc...

Страница 99: ...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 us...

Страница 100: ...end 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 specia...

Страница 101: ...mdExecute 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 MI...

Страница 102: ...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 di...

Страница 103: ...NMP 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...

Страница 104: ...fgEthernetIf0IPv4IP 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 th...

Страница 105: ...nterface 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...

Страница 106: ...ndition mbgLtTrapServerBoot mbgLtTraps 3 After finishing the boot process this trap is generated mbgLtTrapReceiverNotResponding mbgLtTraps 4 Trap to be sent when the in ternal receiver of the timeserv...

Страница 107: ...f 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 pr...

Страница 108: ...ith 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 ventilatio...

Страница 109: ...panel COM_GPS 25 pin SUB D RS 232 shielded data line Pulse Output 9 pin SUB D TTL via 50 shielded line Time Limit Error 9 pin SUB D Relay make contact Antenna GPS Coax type N 35 4 MHz 10 Mhz shielded...

Страница 110: ...Rear View LANTIME 110...

Страница 111: ...SUB D Connector Assignments 111...

Страница 112: ...alid 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...

Страница 113: ...Accuracy of frequency TCXO quartz standard 113...

Страница 114: ...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...

Страница 115: ...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 w...

Страница 116: ...ogPulse1 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 GN...

Страница 117: ...nd 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 s max 50 s Time shifting of s...

Страница 118: ...HUMIDITY Relativ humidity 85 max TEMPERATURE RANGE 0 60 Celsius POWER SUPPLY 5 V approx 330 mA 118...

Страница 119: ...0 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 Synt...

Страница 120: ...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...

Страница 121: ...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 IDE BUS Primary IDE Bus male connector type C 96 VGA CONNECTION 1...

Страница 122: ...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...

Страница 123: ...he 12V outputs should be smaller than 4 100 mA TOTAL SAVE LOAD Max 35 Watt TYPE OF CONNECTOR Male connector according to DIN 41612 type H15 pre mating protective contact MOUNTING FRAME 19 module 3U 9H...

Страница 124: ...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 af...

Страница 125: ...whereas 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 dat...

Страница 126: ...1 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 Uni...

Страница 127: ...ime 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...

Страница 128: ...ter 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 l...

Страница 129: ...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 le...

Страница 130: ...reas 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 ASCI...

Страница 131: ...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 cur...

Страница 132: ...Menu Quick Reference 132...

Страница 133: ...r St rfestigkeit von informationstechnischen Einrichtungen Limits and methods of measurement of Immunity characteristics of information technology equipment EN 61000 3 2 3 96 Elektromagnetische Vertr...

Страница 134: ...ging 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 te...

Страница 135: ...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...

Страница 136: ...er 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...

Страница 137: ...nna_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 ET...

Страница 138: ...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...

Страница 139: ...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 wi...

Страница 140: ...e 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 soft...

Страница 141: ...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 appl...

Страница 142: ...ipients 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 infrin...

Страница 143: ...ll 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 T...

Страница 144: ...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 for...

Страница 145: ...IRIG Standard Format 145...

Страница 146: ...AFNOR Standard Format 146...

Страница 147: ...me 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 time...

Страница 148: ...t 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...

Страница 149: ...50 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 SPA...

Страница 150: ...UP menu with the submenu USB MEMORYSTICK and the type of stick will be displayed If the Lantime found a special menu and file structure on the USB stick you will get the new submenus by pressing the N...

Страница 151: ...The Menu Script will define the real name of the script file which will be started if the submenu will be activated with the CLR ACK button The following message will be displayed on the LCD With the...

Страница 152: ...ave to be remounted for writing use the command mount o remount rw mnt flash Keypad locking The USB stick can be used for locking the buttons of the Lantime LC display Activating this feature the user...

Страница 153: ...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...

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Meinberg LANTIME, Руководство по эксплуатации

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