E:\甘\产品特性\GTT030\英文版User manual of GTT030.DOC
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1. Time 61 38 46 UTC Receive Satellite 16 Enter Q to exit others to continue Figure 3 3 Check the work status 3 2 5 Chage the password If type 4 in the main configuration interface it will enter into the change password screen shown as 0 At first you need to type the original password If correct it will prompt to type a new password The user password contains 5 8 characters Note the password can not be too simple If take some meaningful words as the password it will probably be refused by the system So the password with combinations of upper and lower case strings is appropriate Changing the password of user ntpuser Changing password for ntpuser Old password Enter the new password minimum of 5 maximum of 8 characters Please use a combination of upper and lower case letters and numbers Enter new password Re enter new password Password changed Press any key to continue Change the password GlobalTime NTP Products User manual of GTT 030 3 2 6 Exit If type 5 in the main configuration interface it will return to the user login screen 3 2 7 Time server logon through the network For the sake of the system security the time server supports login by SSH The CD ROM is accompanied by a SSH terminal software pietty exe which can be directly copied to the computer and work properly The login configuration is as the following interface The interface after connecting is the same as the Hy2. a broken feeder conductor 2 When we connect the feeder into the interior it should be bent into U shape to prevent In the feeder should be bent into the interior U to prevent water from flowing backward You can use GPS signal transponder to lead the signal to the interior Generally speaking GPS signals can be well received within 5 m of the transponder antenna Because of the way of forwarding it is much effective for the prevention of lightning and the protection of the host Problems caused by the lightning is the transponder damaged Due to a certain transmitting power it is suitable for some occasions GlobalTime NTP Products User manual of GTT 030 Table 2 1 Antenna Specifications Frequency range 1575 5MHz RF connector N type connectors Noise coefficient lt B Storage Q i lt 1 5dB temperature O Power consumption 3Vx20mA 2 3 Indoor installation After connecting 220V AC to the master device the indicator light Power on the front panel should be lit and indicate that the running of power supply is normal Then the status light starts to be yellow red and green and estinguishes in 1 minute If GPS receiver is in good running it will turn green about 15 minutes later and the system starts to work normally To measure the BNC antenna socket with a mutimeter the feed voltage should be up to 5V Then connect the antenna cable with the antenna socket Next use a computer to pass through the IP address and net
3. interface with date and time properties Then select the Internet time screen which is shown as the picture in the next page Secondly modify the windows default time server such as modifying to 192 168 2 8 Thirdly click Apply and then Update Now After a successful synchronization it will show successful wee synchronization time in year hour minute The next synchronization year mounth Date hour minute Windows default is to synchronize once a week If the screen displays RPC not available you should open the Control Panel select Administrative Tools Services search windows Time from the services list choose to automatically open the service and restart it Date and Time Properties Date amp Time Time Zone Internet Time Automatically synchronize with an Internet time server Server time windows com w Update Now 4n error occurred while Windows was synchronizing The peer is unreachable Next synchronization 30 07 2002 at 22 59 Synchronization can occur only when your computer is connected to the Internet Learn more about time synchronization in Help and Support Center GlobalTime NTP Products User manual of GTT 030 Fourthly if you consider the synchronization cycle is too long youcan modify the registry to shorten the synchronization cycle The specific registry key is in HKEY_LOCAL_MACHINE SYSTEM CurrentControlSet Services W32Time TimeProviders NtpClie nt
4. part 2 2 Outdoor installation The outdoor part consists of the GPS satellite receiving antenna surge arresters transmission cables and antenna amplifier The installation attentions are as follows At first the antenna installation location needs to be carefully selected which will signigicantly influence the equipment working The antenna should be installed in high places and can not be blocked such as the roof open top etc If you want to achieve better results you d better keep the elevation angle of 15 degrees not blocked It is useless to install the antenna inside the room because GPS satellite signal is very weak and can not be received indoors It is no matter if there are trees or plastic rain shelter blocked above the antenna but other block will influence the signal significantly In fact only a book above the antenna can completely block out the satellite signal GlobalTime NTP Products User manual of GTT 030 Antenna installation should be lower than the lightning rod or other constructions that can attract thunderstroke and the installation location should better be 10 15 meters away from them GPS antenna itself is rarely struck by thunderblot but is often damaged by the stong induced electric field resulted from the stuck buildings the lightning rod tower etc around In this circumstance we should install the arrester in the cable Normally the arrester will be installed near the equipment To make sure that the
5. 0 years To adjust local time with this reference signal can eliminate the accumulation of deviation resulted from the low accuracy of local clock time and also can greatly improve the timing precision of the server GTT 030 network time server use a professional 12 channel GPS receiver It can receive and lock the satellite signal fast and reliably NTP protocol Network Time Protocol is a common international network timing protocol Its principle is through the client to launch a time polling to the server after an interval of time According to a certain filtering algorithm it can calculate the time deviation between the server and the client as well as the propagation delay caused by network transmission Then according to these two parameters to adjust the client s local time and make it consistent with the server Compared to other time calibration prorocols NTP protocol can eliminate the impact caused by network transmission delay so it can provide high precision timing services Detailed description can be referred to the latest protocol standards documents RFC1305 and RFC2030 GTT 030 network time server can be compatible with NTP v2 v3 v4 in various versions 1 4 The device description v Aenne u r Figure 1 1 The front panel description The front panel is as shown above The interface functions are as follows monitoring local monitoring serial port DB9 public outlet RS232 electrical level l Network 10 100M Base
6. GlobalTime NTP Products User manual of GTT 030 P GlobalTime Catalog Catalog vsrsssssssssssssssssnssccsnnsccssnsecssnsscssnsccssnnscsssnscsssnscsssnscsssnecessnssssnsccssnsscssnescssssscssnssessnnsecssnscsanscsssnecessnesss 1 Chapter 1 Basic information and packagingseeeeeeeeeeeeeeeeeeeeeeeereeseeeeseeeseeeeeeeseeeereeseeeeeeeeseeeeeeeseeeeene 02 1 1 Key featyreseeesesseseeeeeeeneeereteteeieteeritseerestertestetrstetrssttt esseet essreteesttttestter ester ersen erster ett 02 1 2 To Toae reser teeeee tence teeeseseeeessneceessneeeesniecensniscessniecessuieessiissessnuussessniusesnnisessniessniies 02 13 Oulie ree e er a on sew mice E aaa ieee 02 1 4 The device descriptione eetet tttteeetssteeettsteretttssretttrssrtetttessnnetttesnetttrssnettrestneet 03 Chapter2 Hardware installation and commissioningeeeeeeeeeeeeeeeereeeeeeeseeereeeeseeeseeeseeeeeeeeseese 04 2I The device structures eote in atta e e aa pina apa aeaa Tape irii ETE Da aaie 04 29 Outdoorinstallanonm ne einig eana ie e ta a Eaa re Rone A aaia a aes 04 23 door installajog e i nien eo aw aaa eae a EESE EEEE EE EE Ean 06 Chapter3 Equipment Maintenance r s sssssseesssseesssseessseessnneessnneccsnneccssnessnneccssnecsssnecsssnesessnssensaes 07 BY Ipdcatorstald er arren an E A een 07 3 2 Server Configuration Debuggingee eveeveeseeeeeeeeeeereeterertsrerttstertistetrssetrrsrt erstens 07 BO User Logieeeeeeeeeeeittsitttiiiiiistssttststsisitetastenttstst siti ttastsns tetten si tr astsara
7. SpecialPolllnterval The default is 604800 60 X 60 X 24 X 7 namely a week synchronization once a day The default is 86400 synchronization once an hour The default is 3600 synchronization once ten minutes The default is 600 Fifthly after modifying the registry you should stop windows time service and restart it Then the time interval can be updated If it has been installed with other time synchronization software you need to uninstall the software and restart the computer The windows time service can work normally For Win2000 98 operating system the time synchronization software provided by our firm or provided by the third party are both available The specific configuration can be referred to the respective user manual For UNIX systems in general there is ntpd daemon or xntpd daemon Create the ntp conf configuration file under the ETC directory and type server time server IP in it Then starting the daemon will do Regarding the details please refer to the user manual or consult us directly 3 5 Troubleshooting 3 5 1 All indicator lights are off when power is on Check whether the power outlet is with electricity There is a fuse socket in the device You need to unplug it and check whether the fuse is intact 3 5 2 Receiving no satellite signals for a long time Emphasis should be placed on verifying whether the feeder system is normal Firstly unplug the feeder on the side at the device Then m
8. T adaptive network port RJ45 connector l 2 Indicator lights one indicates the power while the other indicates the status both of them indicate the device working state Figure 1 2 The back panel description GlobalTime NTP Products User manual of GTT 030 The back panel is as shown above There is a power socket with a fuse on the back panel After opening the fuse base there are a primary and a reverse fuse with specification of 0 5A on each side to facilitate users replacement In addition there is also an antenna plug as well as 50 ohm BNC Socket Chapter 2 Hardware installation and commissioning 2 1 The device structure GPS receiving j antenna P SOE g Antenna amplifier Fremra ar TO GTT 030 ez da ee Os A J Lighting arrester Figure 2 1 Device Structure GTT 030 network time server consists of the outdoor part and interior part The outdoor part is composed of the GPS satellite receiving antenna surge arrester and antenna amplifier optional The function is to complete the reception of satellite signals The interior part is the master device of GTT 030 network time server to complete the functions of the satellite signal demodulation the local clock calibration achieving NTP protocol and so on It provides NTP timing service to other network equipment by means of 10 100M Base T adaptive network ports The following are the detail installation description of the outdoor part and the interior
9. arrester can be well earthed the arrester should be installed between the feeder and the equipment Then lead the grounding wire from the arrester and connect it to the earth The earth resistance should be under 4 ohm and must be firmly connected to ensure the reliable discharge by lightning Sometimes the antenna can be installed outside the window but the building must be located in the open fields with no corner In this way it can receive at least half of the satellite signal But as a long term using equipment it is recommended that the antenna is installed in high places while the outside installation can be only adopted as a temporary test The high power microwave transmitting of the same band can not be around where the GPS antenna is installed In addition we should try to avoid the GPS antenna from the direct irradiation of high power electromagnetic radiation If the length of the feeder is less than 100 meters the antenna and equipment can be directly connected between 100 meters to 200 meters one more line amplifier is needed ranging from 200 meters to 300 meters two more amplifiers are needed If you need longer feeder links please contact us GlobalTime Electronic Co Ltd We will provide the special program to you The feeder usually adopt 1 2 inch RF cable whose loss is 12 8dB 100m from the United States Andrew s The primary considerations when setting up the feeder 1 Do not bend too much because it will result in
10. easure the BNC socket with a multimeter Normally there is 5V antenna supply voltage Otherwise it shows that the equipment has been damaged GlobalTime NTP Products User manual of GTT 030 Then verify the outdoor antenna is well connected such as verifying the outdoor joints are tight the connectors are waterproof the antenna is aleak and so on You should troubleshoot the obvious problems one by one Last disconnect the antenna connector and measure the resistance of the feeder When the remote end is open the near end resistance should be infinite Besides when the remote end is shorted the near end resistance will be only a few ohms If it is shown abnormal verify the feeder and the connctor is intact The normal faults the quality of the line is not good the connectors are not done well lines are scratched or bitten by small animals etc If the feeder is added a lightning arrester or an antenna amplifier in the middle you still need to verify the two components is intact After eliminating the above breakdown if it still can not receive the satellite signal please contact the service hot line of Shanghai GlobalTime Electronic Co Ltd Our engineers will help you with the further processing 3 5 3 Can not ping the time server after configuration First verify the physical network connection You can see if the corresponding connection status light is normal by observing HUB or switch connected with the time server And the
11. ette tet cten ees 15 Chapter 4 Detailed performance index of the equipment a A A T 16 Chapter 5 Appendix esecccccccccccccccccocscsosoooooosesosososocscecscocococococscoososesesesosososococecccscscsssoscsesesesesesesesesosssosssseses 17 GlobalTime NTP Products User manual of GTT 030 Chapter 1 Basic information and packaging GTT 030 network time server is the professional network equipment providing highly stable time source GTT 030 network time server receives GPS satellite signals and extracts the timing information to adjust the server s local time It distributes standard time via NTP protocol Network Time Protocol Upon the PC or server which need time synchronization services a client program will read the NTP protocol derive time information and modify the time of related equipment The network time server is widely used in telecommunications finance taxation public security and other special network as well as common corporate network to unify the network time 1 1 Key features Receive GPS satellite signals or the dual satellite signal of GPS and GLONASS optional Adopt RFC1119 1305 NTP protocol Network Time Protocol to delivery time Support RFC1769 2030 SNTP protocol Simple Network Time Protocol Different client programs support Windows 98 2000 NT XP Linux Unix FreeBSD and other operating systems to adapt to different applications 10 100M BaseT adaptive network interface Ways of maintenance the local
12. heir own time For example the routers of Cisco Avaya Ascend and Huawei can all receive NTP services Some series switches also support the NTP protocol For instance the configuration command of Cisco router is ntp server lt IP address gt Regarding the specific configuration please refer to the manual provided by the manufacturers To unify the network time by NTP protocol can effectively improve the quality of network service It can also judge the cause of the malfunction by checking the unified time Log files when the network goes wrong GlobalTime NTP Products User manual of GTT 030 Chapter 4 Detailed performance index of the equipment GPS receiver 12 channel GPS receiver L1 Band C A Code position hold type l l l Cold start time 200 seconds Warm start time 50 seconds Hot start time 25 seconds l Positional Accuracy 100 meters Timing performance Server Time Level Stratum 1 Server time precision 1ms Precision of client time 10ms Timing capacity gt 100 times per second Network protocol support RFC 1119 1305 NTP v2 v3 v4 RFC 1769 2030 SNTP v2 v3 v4 10 100M Base T adaptive Ethernet SSH FTP DHCP Power supply and the environment Power supply 15W 220 240V AC or 48VDC Environment Temperature 0 50 C Relative humidity 0 90 GlobalTime NTP Products User manual of GTT 030 Chapter5 Appendix Shanghai GlobalTime Electronic Co Ltd is a leading company that focuse
13. in configuration window 3 2 2 View the network status The network config of NetCard 1 IP address 192 168 2 8 Netmask 299 299 259 0 Gateway 192 168 2 1 input y for continue n for try again y n network configuration window Press 2 ENTER and the present network setting will be displayed including IP address subnet mask and gateway If you enter y it will return to the previous menu 3 2 3 Change network setting When you press 2 ENTER in the main configuration interface initially it will ask whether to use DHCP protocol to assign IP address If you would like to use DHCP protocol to assign IP address then select Y Otherwise select N GTT 030 support getting IP address through DHCP but it always need a static IP address because the server needs to supply the network timing service to other devices As a result in DHCP network system the recommended configuration is to assign a static IP address from the IP Pool of DHCP server to GTT 030 Other devices can use the static IP to access GTT 030 When it asks whether to use DHCP If you select N it will prompt to enter the server IP address subnet mask and gateway IP address Finally it will prompt whether to modify the network configuration in accordance with settings entered then select Y and it will change the equipment configuration This configuration can not take effect until rebooting the server So we need to restart the server We can modify the netw
14. maintenance serial port remote login remote dial up 2 lamps display the device working status 1 2 Packaging Please check the shipping package which should contain the following items 1 GTT 030 network time server 2 3 4 5 6 Antenna cable Power cable 1 meter cable rack set screws wewwmw GPS satellite receiving antenna 7 Antenna fixed accessories 8 The user manual 9 The software CD 10 The packing List NN ana ian i Sm 1 3 Outline With the rapid development of modern society higher demand on the time precision and frequency is put on the agenda Nowadays with the development of modern digital communication networks and the information superhighway construction the political cultural technological and social information coordination is based on a strict system of time synchronization especially in the communications electricity financial securities computer networks production line operation administration and national defense and other fields urgently need the time synchronization equipment GlobalTime NTP Products User manual of GTT 030 Global Positioning Satellite GPS signals act as the reference source of GTT 030 network time server The time reference contained in the GPS satellite signals synchronizes with the universal time coordinated UTC The long term frequency stability has achieved the10 13 level of magnitude of cesium atomic clock which is equivalent to be only 1 second slower during 3
15. n check if there is something wrong with the network settings You can use a crossing cable to connect the server to the computer directly to see if ping is ok Then use HUB to test in the same network segment Finally test the different segments Following these steps it is easy to troubleshoot Some firewall software on your computer will provide a protective screen from ping operation So it s better to check the network after turning off the firewall You may also verify the IP address without devices and the IP reply set by the time server 3 5 4 Instable state of receiving satellite signal equipment is in hold mode In general it is caused by the improper site selection of the satellite receiver antenna If this state shows often you should consider to select another site to install the antenna that is a place free of anything overshadowed and the surrounding microwave interference 3 5 5 The client can not receive timing service NTP protocol usually proceeds timing service through port 23 with UDP protocol and sometimes with TCP protocol So port 23 service should be allowed to go through the intranets gateway and the firewall Please check the gateway and the firewall configuration GlobalTime NTP Products User manual of GTT 030 3 5 6 How to configure the network equipment to receive time service NTP protocol is an international standard protocol The network equipment of many manufacturers can receive NTP protocol to adjust t
16. ork configuration for many times before restarting the equipment but only the last one can take effect The configuration interface is shown in Figure 4 Using DHCP Ly nIn IP address 192 168 2 60 Network Mask 255 255 255 0 IP of gateway ENTER for no needed 192 168 2 254 Do you want to change the network setting like above y Please restart the machine to make the change active _ Figure 3 2 The network parameters configuration interface GlobalTime NTP Products User manual of GTT 030 Note When it displays Please restart the machine to make the change active press ENTER to return to the previous interface Then select 4 Exit the setting can take effect If directly turn off the computer it will result in the configuration failed 3 2 4 Display the status By entering 3 in the main configuration interface you will enter the check the work status interface shown in Figure 3 3 The figure shows that the current time of the time server is of level 1 The time root deviation is 19 487 ms and the current UTC time is 1 38 40 There are 10 satellites which can be tracked in the sky Note the time shown is UTC time which differs by 8 hours from China Standard Time China time zone is 8 Entering Q will return to the main configuration screen while entering other keys will continue to the next step When GTT 030 network time server work properly the time level is 1 or else it is 16 stratum 1 rootdispers ion 19 487
17. perTerminal login DX PieTTY Configuration xj It s Easy To Create Your Connection Host Name or IP address Port 22 C Telnet BBS SSH User Interface IV Menubar I PuTTY mode M English UI PieTTY Session Loaded 192 168 2 7 Host 192 168 2 7 About Open Cancel eo SSH login configuration interface 3 3 Remote dial up maintenance We can use the MODEM to achieve remote dial up maintenance with the serial monitoring port of GTT 030 network time server In order to make it please follow these steps IA Initially set the MODEM to auto answer mode and connect the MODEM and a computer serial port with a serial cable The configuration is shown in Figure 3 1 Type the following three commands in the HyperTerminal atSO 1 at amp WO at amp Y0O Note The commands are case sensitive GlobalTime NTP Products User manual of GTT 030 Connect the MODEM and GTT 030 network time server monitoring port with a serial cable Then plug the telephone line Finally dial this number through the Hyper Terminal of another computer with MODEM and it can be connected with the server The configuration is as introduced in section 3 2 3 4 Client configuration Regarding WinXP 2003 system it includes NTP services and can be directly set The specific setting methods are as follows Firstly double click the time mark on the right side of the windows task bar and it will pop up an
18. s on professional time synchronization products and services We provides 7x24 hour hot line for technical support If you have any questions about our products or the solutions please not hesitate to contact us according to the following address clobarrime GlobalTime Electronic Co LTD Add A2 1 No 399 Dakang Road Daliu Industrial Building Shanghai China Zip Code 200443 Tel 86 21 36531 186 Fax 86 21 36531185 Mail contact ntpclock com Website www ntpclock com
19. sides are cross connected The management is carried out on the super terminal The serial port configuration parameters of the super terminal are as shown in Figure 3 1 Under the remote telnet connection you only need to enter telnet lt IP address of the server gt under the command line The following example describes the maintenance methods with local connection so does remote maintenance GlobalTime NTP Products User manual of GTT 030 Port Settings Bits per second 115200 gt Data bits fa gt Parity None Stop bits hi 7 Flow control Restore Defaults Figure 3 1 Terminal serial port Debugging settings 3 2 1 User Login After connecting the hyper terminal press ENTER and you will see the login screen just like 0 Then enter the user name ntpuser and the password Users Note Pay attention to the last When you have login in you can set your own password Welcome to Globaltime NTP server GlobalTime NTPSever login Login window After logging in there will be a interface such as 0 configuration interface There are totally 5 choices view the network status change network setting display the status change the password and exit The detailed description of each function is introduced as follow GlobalTime NTP Products User manual of GTT 030 1 Network status 2 Change network setting 3 Display the status 4 Change the password 9 Exit Choice the ma
20. tetet sasate asteari t sasata sattara t 3 2 2 View the network status 3 2 3 Change network setting 3 2 4 Display the statUSeeeeeeeeeeeeereeerreererrrrrerrerrrrsrrererrerrerrrrssreenrrnrrererrerrnrnrrenrernrrnnrernerenrnnnrrenerenrrenrrenrrenreenerenerrerrereeeeeret 0 3 2 5 Chage the password seeasaeaeaeacesdecaecsenencesdadenseeaeseasencessescscseaessasendeseascessnnassdeonnssacedenesedbasecessseaesoadeccrssenensenceransoneseseransecs 10 3 2 7 Time server logon through the AY I 0 d CoRReReeReeeeee SESE OOOOE OSES OOOOOCESOOOOOOOOOOOOOOSOOOOOOOOOOOOOOOOOOOOOOREOOOOO 41 3 3 Remote dial up maintenance eeeeeeeeeeeeeeeeeeeeereeressessssesesssesseeeeeessssereeeessssereeeeesssssreeeeessssreeeeessesereeee 11 3 4 Client Configuration a a a a a a a a a E 12 3 5 Troubleshooting a a sie anedies veins sicinanadies nan ans sue cinadsanaeneds sueeaussararnesesiogsee 13 3 5 1 All indicator lights are off when power Kola RRReRRReR eR OEOOOOSSEEOOOOOOSOOOOOOOOOOOOOOOOOOSSOOOOOOOOOOOOOOOOOOOOOEESSOO SO 43 3 5 2 Receiving no satellite signals fora long 1 3 00 Recor eceeeec 13 3 5 3 Can not ping the time server after configuration P IA T E TE E E E E E EAE 14 3 5 4 Instability state of receiving satellite signal the equipment is in hold MOU e errr tee teeter tees 14 3 5 5 The client can not receive timing Toya AV 01 gt SERRE CRESS OOOO OOOOOOOOEOEEOOOOOOOOOEORES 14 3 5 6 How to configure the network equipment to receive time SELVICE sere re teeter teeter tect c
21. work settings of the serial port configuration time server save and exit then restart GTT 030 Network time server to make the network settings take effect After reboot input the IP address of the PING server in another computer to check the network settings correct or not Then log on the network time server from SSH client to observe the satellite receiving state the information on time tracking state of the server and so on When the server locks the satellite time The indicator light on the panel turns green GTT 030 starts to provide time information to other clients within the network The specific process of software configuration can refer to the following chapter GlobalTime NTP Products User manual of GTT 030 Chapter 3 Equipment Maintenance 3 1 Indicator state Table 3 2 Indicator Status Indicator Status Description on The power supply is normal Power supply off The power supply is abnormal off The server is unlock The server is in the maintaining state and can not State orange track the satellite but the output time of the server is still available green The server is inthe normal tracking state 3 2 Server configuration debugging GTT 030 network time server can conduct maintenance and management through the local serial cable connection or the remote telnet connection The local connection needs to use a cross serial cable with connectors on both sides that is 2 3 feet of the two
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