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GPS IRIG-B/NTP Time Server

GPS-2-E-NTP

June 01, 2013

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Summary of Contents for GPS IRIG-B/NTP

Page 1: ...GPS IRIG B NTP Time Server GPS 2 E NTP June 01 2013 ...

Page 2: ... Introduction 3 2 Hardware 4 3 Mounting GPS antenna 5 4 Powering up GPS 2 E NTP 6 5 NTP Network Time Protocol 7 6 GPS 2 E NTP software Setup 9 7 Technical speciﬁcation 12 7 1 SYSTEM 12 7 2 HARDWARE 12 7 3 CASE 13 7 4 GPS 14 7 5 POWER 14 7 6 ACCURACY 14 7 7 OTHER 14 ...

Page 3: ...UTC time is powered by cesium atomic clocks coming via GPS Global Positioning System satellite system The independent GPS antenna can be connected optionally too Both antennas works redundant The GPS 2 E NTP distributes UTC reference time to 1 Ethernet 10 100Mbs sub network All time and satellite information is traced on front panel 2 isolated LCDs More detailed statistic is available by remote NT...

Page 4: ...S communication and timestamp information Figure 1 Front panel of GPS 2 E NTP BIT Press it to delete the safe working days number DATE Page up SHOW Page down Return to main menu Press 3 seconds Press it to display Date Work days number Longitude Latitude The time of switching on the device Altitude POWER LOSS LED Red light when 110 220V AC power is on LED off while power off GPS LOSS LED Red light...

Page 5: ...obal Positioning System GPS is a satellite based radio positioning navigation and time transfer system The source of time is based on real cesium atomic clocks Time is represented as UTC GMT GPS worldwide time propagation The GPS satellites are not stationary but circle round the globe in a period of about 12 hours They can only be received if there is no building in the line of sight from the ant...

Page 6: ...s data in its battery buﬀered memory and the receiver position has not changed signiﬁcantly since its last operation the receiver can ﬁnd out which satellites are in its view at that now Only a single satellite needs to be found to synchronize and generate output pulses so synchronization can be achieved maximally two minutes after the powerup After starting up the system the network function is i...

Page 7: ...n larger number of clients on a higher numbered stratum Stratum numbers increase from the primary stratum 1 servers to the lowest numbered strata at the bottom of the tree stratum 15 Clients can use time information from multiple servers to determine automatically the best source of time and prevent wrong time sources from corrupting their own time For sure it may take several minutes or even hour...

Page 8: ...signated intervals until the server responds The interval depends on a number of factors and ranges from about once a minute to once every 17 minutes Using UDP prevents retries from using up network bandwidth if a time server with a large number of clients goes down The bandwidth requirements for NTP are also minimal Unencrypted NTP Ethernet packets are 90 bytes long 76 bytes long at the IP layer ...

Page 9: ... terminal software Please connect your sub network cable to GPS 2 E NTP Other side of cable please connects to any available computer with Windows Once terminal is connected the setup appears automatically after clicking Local Search on screen Main menu To start conﬁguration you shod ﬁrst conﬁgure the LAN interface by simply placing IP MASK DEFAULT GETEWAY for the Ethernet card ...

Page 10: ...Network Time Service GPS 2 E NTP www buenoptic com 10 Setting the NTP Service Setting ...

Page 11: ...Network Time Service GPS 2 E NTP www buenoptic com 11 Setting IP address MASK address GATEWAY address ...

Page 12: ...P supports all versions of NTP SNTP including latest release 4 1 1 supporting modes CLIENT SERVER BROADCAST MULTICAST Authentication MD5 with manual automatic key generation SNTP supports all versions of Simple Network Time Protocol OS supports Windows 95 98 Me 2K XP CE OS 2 VAX 11 785 v4 3 HPUX SunOS Solaris MIPS Ultrix ALPHA OSF 1 SGI IRIX A UX AIX Sinix BSD Linux Dell SVR4 SCO Unixware CISCO pr...

Page 13: ...www buenoptic com 13 Configuration of terminals on rear panel 7 3 CASE HAUSING Metal desktop case 2U Front panel 86mm high 483mm wide PROTECTION rating IP20 DIMENSIONS PHYSICAL DIMENSIONS 483 86 286mm LC DISPLAY 6 character 8 character ...

Page 14: ...CEIVER input frequency 1575 42MHz L1 7 5 POWER INPUT 110 240V AC DC Main Power or 24V DC Redundancy Power FUSE 1 electronic OUTPUTS 5V 5A TOTAL LOAD 15 Watt 7 6 ACCURACY GPS better than 100 nsec after synchronization of ﬁrst 1 hour better than 1 µsec during the ﬁrst hour of operation NTP better than 10 msec with nanosecond kernel 7 7 OTHER TEMPERATURE 0 70 STORAGE 40 125 HUMIDITY 85 max ...

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