Meinberg LANTIME Operating Instructions Manual Download Page 153

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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

Summary of Contents for LANTIME

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

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 47: ...Configuration Ethernet 47...

Page 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...

Page 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...

Page 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...

Page 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...

Page 52: ...Configuration Notification 52...

Page 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...

Page 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...

Page 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...

Page 56: ...Configuration Security 56...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 69: ...Configuration Local 69...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 77: ...Configuration Statistics 77...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 110: ...Rear View LANTIME 110...

Page 111: ...SUB D Connector Assignments 111...

Page 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...

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

Page 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...

Page 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...

Page 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...

Page 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...

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

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 132: ...Menu Quick Reference 132...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 145: ...IRIG Standard Format 145...

Page 146: ...AFNOR Standard Format 146...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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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