EndRun RTM3205 User Manual Download

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"Smarter Timing Solutions"

USM3205-0000-000 Revision 5
September 2021

RTM3205

Precision Timing Module

GPS-Synchronized

User Manual

Summary of Contents for RTM3205

Page 1: ...Smarter Timing Solutions USM3205 0000 000 Revision 5 September 2021 RTM3205 Precision Timing Module GPS Synchronized User Manual...

Page 2: ......

Page 3: ...ill the demanding needs of the time and frequency community since 1998 The instruments produced by EndRun Technologies have been selected as the time and frequency reference for such rigorous applicat...

Page 4: ...e During the warranty period EndRun will repair or replace at its option products which prove to be defec tive Products not manufactured by EndRun Technologies are warranted for ninety days or longer...

Page 5: ...rvice technician will contact you Loaner units are not included as part of the standard warranty Repair After Warranty Expiration If the warranty period has expired we offer repair services for equipm...

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Page 7: ...Liability iii Chapter One Introduction 1 Main Features 1 Robust GPS Receiver 1 Highly Reliable Modular Design 1 Standard Features 2 Additional Outputs 2 Secure Network Interface 2 Free FLASH Upgrades...

Page 8: ...5 Using HTTPS 15 Connecting Instruments to the RTM3205 16 Chapter Three Console Port Control and Status 17 Console Ports 17 General Linux Operation 17 Available User Commands 18 Detailed Command Descr...

Page 9: ...tpstat 31 oscctrlstat 31 passwd 33 ptpconfig0 and ptpconfig1 Optional 33 ptpstat0 and ptpstat1 Optional 33 rcvrserialnumber 33 rcvrstat 33 rcvrversion 33 resetlastgpswn 33 resetleaphistory 34 rticmode...

Page 10: ...39 upgradekernel 40 upgradercvr 40 upgradercvrfpga 40 upgraderootfs 40 upgradesubsys 40 wrt_sw_opt 41 Chapter Four Hyper Text Transfer Protocol Secure HTTPS 43 HTTPS Interface Description 44 Navigatio...

Page 11: ...GPS Subsystem Upgrade Page 53 Firmware GPS Receiver Upgrade Page 54 Firmware Reboot Page 54 Disable or Restrict Access 54 Chapter Five Security 55 Linux Operating System 55 Restrict Access 56 Restric...

Page 12: ...en Network Time Protocol NTP 69 Configuring the NTP Server 69 Configuring the RTM3205 as a Stratum 1 Server 69 Configuring NTP Using the Network Interface or Serial Port 70 Configuring the RTM3205 as...

Page 13: ...fault PTP Configuration Settings 84 PTP Configuration Using the Network or Serial Port 85 PTP Status Using the Network or Serial Port 86 PTP Operation 87 About the PTP Second and UTC Time 89 PTP Secon...

Page 14: ...IST 99 RTIC Configuration and Status 100 RTIC Configuration and Status Using the Network or Serial Port 100 ionostat 100 rticmode 100 setrticmode 101 RTIC Performance Plots Using the HTTP Interface 10...

Page 15: ...Information 119 Linux Users 119 Linux Commands 119 Detailed Information Is Available 119 Change Password 120 List Active Processes 120 NTP Monitoring and Troubleshooting 120 Text Editors 121 Change L...

Page 16: ...on 137 Background Information 137 Appendix G System Faults 139 Overview 139 Masking Faults 139 System Fault Definitions 139 Receiver Fault Definitions 140 Appendix H Time Code Formats 143 IRIG B122 00...

Page 17: ...ort Commands 147 clearalmanac 147 resetlastgpswn 148 resetleaphistory 149 Appendix K Specifications 151 Software Options 154 System Oscillator 154 Optional Outputs 155 Compliance 157 Special Modificat...

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Page 19: ...the UTC timescale to less than 1 part in 1013 over 24 hour observation intervals The time and frequency outputs are coherent after initial GPS synchronization and synchronization is maintained via 20...

Page 20: ...ise MIB SSH Telnet FTP HTTPS and SNTP Refer to Chapter 2 Basic Installation for information to help you set up your network interface The inclusion of SNMP v3 and SSH provides a very secure network in...

Page 21: ...satellite is supported The GPS system designers defined system time to be GPS time GPS time is a monotonic time scale consisting of an ensemble of high performance cesium beam and rubidium vapor atom...

Page 22: ...om the GPS satellites are available at all locations on the globe you may deploy the RTM3205 virtually anywhere However you must be able to install an antenna with good sky vis ibility preferably on t...

Page 23: ...n tial If you satisfy these conditions the instructions provided herein should guide you to a successful installation For a brief description of some helpful Linux commands and utilities see Appendix...

Page 24: ...rom the external antenna RS 232 Port This DB9M connector provides the RS 232 serial I O console interface to the RTM3205 This console allows you to initialize and maintain the RTM3205 See Chapter 3 Co...

Page 25: ...the antenna on the roof Make sure that it is not blocked by large metallic objects closer than one meter See Appendix E Installing the GPS Antenna for more information 2 Connect the TNC plug on the e...

Page 26: ...After mounting the unit and connecting the antenna cable verify that it still acquires and tracks a GPS signal Refer to the baseplate drawing in Appendix K Specifications for the mounting hole locati...

Page 27: ...nter with the automatic configuration via DHCP If your network does not use DHCP you will need to configure your Ethernet interfaces using the RS 232 serial I O port The following sections contain bri...

Page 28: ...minal should display something similar to this 6010 0066 000 Linux Bootloader v1 00 Jan 1 2013 21 24 16 Default kernel FACTORY To override and boot the UPGRADE version of the kernel type UPGRADE withi...

Page 29: ...powered up you must troubleshoot your setup An incorrectly wired cable or incorrect port setting in your terminal emulation program are the most common problems Refer to Appendix K Specifica tions for...

Page 30: ...IPV4 Only the IPV4 loopback interface will be setup y es n o After configuring your Ethernet interfaces you should shutdown the RTM3205 and reboot it by issu ing this command at the prompt RTM3205 GPS...

Page 31: ...0 0 inet6 addr 1 128 Scope Host UP LOOPBACK RUNNING MTU 16436 Metric 1 RX packets 5808 errors 0 dropped 0 overruns 0 frame 0 TX packets 5808 errors 0 dropped 0 overruns 0 carrier 0 collisions 0 txqueu...

Page 32: ...these protocols are supported in the RTM3205 via the OpenSSH implementations for Linux Refer to Chapter 5 Security OpenSSH for more information about the secure shell protocol Using Telnet When establ...

Page 33: ...5 and shows the software part number version and build date RTM3205 GPS 6010 0069 000 v 1 00 Sat Jan 19 14 17 44 UTC 2013 RTM3205 GPS root RTM3205 This last line is the standard RTM3205 prompt After c...

Page 34: ...CMOS drivers which are able to maintain output TTL levels into a 50 ohm load The low phase noise spectrally pure sine wave outputs are capable of driving 1 Vrms into a 50 ohm load Care should be taken...

Page 35: ...Linux Information Console Ports Three interface ports are available on RTM3205 Two are 10 100 1000Base T Ethernet ports and one is an RS 232 serial port Network cables and a serial cable are provided...

Page 36: ...able dumpalmanac Prints the current GPS almanac data for all satellites in Yuma format dumpephemeris Prints the last received GPS ephemeris data for all satellites in Rinex 3 01 format faultstat Print...

Page 37: ...des you in configuring the NTP Subsystem Allows configuration of MD5 authentication and broadcast multicast mode All parameters are retained in non volatile FLASH disk storage ntpstat Prints the value...

Page 38: ...formation setsigfltmask Command to enable or mask the Signal Loss Fault See the sigfltmask command settfomfltlvl Command to change the TFOM fault level sigfltmask Prints the current setting for the Si...

Page 39: ...upgrade process upgradercvr Command that performs the GPS Receiver upgrade process upgradercvrfpga Command that upgrades the FPGA resident on the GPS Re ceiver upgraderootfs Command that performs the...

Page 40: ...Pulse Output PPO See Chapter 10 Inputs Outputs Output Options for more information Command cpuio RTM3205 reply CPU I O A AM TIME CODE OUTPUT is Installed Current Setting See systemio command CPU I O...

Page 41: ...of Applicability s 5 038080000e 05 Orbital Inclination rad 9 637917876e 01 Rate of Right Ascen r s 7 828898418e 09 SQRT A m 1 2 5 153603027e 03 Right Ascen at Week rad 1 158766985e 00 Argument of Peri...

Page 42: ...Appendix I Software Options for information on this command gpsdynmode This command displays the current GPS Subsystem dynamic mode of operation It has two possible settings OFF or ON When it is OFF...

Page 43: ...ngitude and height above the WGS 84 ellipsoid PDOP HDOP VDOP and TDOP are also shown OORCnt is the out of range counter which may be non zero when RTM3205 has been moved more than 1 km from its previo...

Page 44: ...GC EFCDAC C No FLTR FLTS Where LKSTAT is the tracking status of the GPS Subsystem either LOCKED or NOTLKD TFOM is a value between 3 and 9 and indicates clock accuracy A detailed explanation of TFOM is...

Page 45: ...a particular system fault Assertion of any of these bits will light the Alarm LED Bit definitions are shown below Decoding the bits can be difficult for non programmers For a more user friendly metho...

Page 46: ...three years on either June 30 or December 31 The second line of output contains the parameters for calculating the small residual offset between the GPS master clock ensemble and UTC USNO This is typi...

Page 47: ...If it is set to ON then all timing signals will be inhibited not pres ent until the system is locked to the timing receiver If it is set to OFF then the timing signals will be present at all times Com...

Page 48: ...you to configure the IP network subsystem of RTM3205 By default the unit is configured to configure itself using the Dynamic Host Configura tion Protocol DHCP If you need to set up static IP configura...

Page 49: ...itive implies that the system clock is ahead of the GPS Subsystem clock RCVDCNT is a count of the number of NTP packets received since startup of the NTP daemon This is a 32 bit counter so it will wra...

Page 50: ...ments in seconds The tau associated with this measurement is three seconds which is the update interval of the position fixes received from the GPS Receiver AGERATE is the regression computed system o...

Page 51: ...has been installed Refer to Chapter 9 PTP IEEE 1588 for more information rcvrserialnumber This command shows the serial number of the GPS receiver in the RTM3205 Command rcvrserialnumber RTM3205 reply...

Page 52: ...ting is ENABLED Command setantfltmask MASKED RTM3205 reply Antenna Fault Mask set to MASKED setcaldelay This command starts an interactive utility that allows you to change the clock calibration delay...

Page 53: ...cent antenna installation Command setgpsrefpos RTM3205 reply Interactive utility is started setinhibitoutputsmode This command allows you to set the inhibit mode of the timing outputs Timing outputs a...

Page 54: ...ply Bootloader 6010 0070 000 v 1 00 Dec 27 2012 14 48 55 FW 6010 0076 000 v 1 00 Jul 12 2015 16 08 46 FPGA 6020 0016 000 v 01 Wait 13 seconds while resetting GPS receiver syskernel This command return...

Page 55: ...ble to obtain timing information from the GPS Subsystem or to reject the timing information that it is obtaining from it S sssssssss is the offset in seconds between the NTP system clock and the GPS S...

Page 56: ...This command displays the current time mode for the optional Time Code Output Time modes are UTC GPS and LOCAL The displayed Local Time Offset from UTC and the DST Start Stop param eters are only vali...

Page 57: ...cedure One argument is accepted whose value is either 0 or 1 which causes a flag to be set that indicates to the bootloader which kernel image should be loaded by default If an argument value of 2 is...

Page 58: ...uting this command you must copy the new binary file to tmp rcvrfpga bin The utility starts the X modem file transfer and then displays progress to the console See Appendix B Upgrading the Firmware Pe...

Page 59: ...2 0 5 U s e r M a n u a l C O N T R O L A N D S TAT U S C O M M A N D S Command upgradesubsys RTM3205 reply Upgrade progress is shown wrt_sw_opt See Appendix I Software Options for information on thi...

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Page 61: ...RTM3205 uses HTTP over SSL SSL is a sublayer under standard HTTP HTTPS enhances security because it encrypts and decrypts the requested and returned pages from the server including any passwords whic...

Page 62: ...web browser must be configured to allow pop up windows To get started with the web interface simply point your browser to the IP address of RTM3205 and log in securely with HTTPS Following are example...

Page 63: ...the page below the main menu tabs are Home Receiver Plots Clock I O Faults Network NTP PTP and Firmware The tabs across the top and the left side links are logically ar ranged for easy navigation Page...

Page 64: ...stics Current CPU temperature CPU free memory and CPU load average are all shown Home User Manual This link provides access to the RTM3205 User Manual that is resident in the FLASH memory The most rec...

Page 65: ...iew use the selections on the right side of the page First click to select a directory Then you can either click to select one of the listed plot files or you can use your mouse to hover over one of t...

Page 66: ...The carrier to noise ratio is an indicator of the GPS signal quality This number typically ranges from 39 to 50 dB when RTM3205 is locked GPS Dynamic This field shows whether the dynamic mode is set o...

Page 67: ...A0 A1 These fields show the parameters for calculating the small residual offset WNt tot between the GPS master clock ensemble and UTC USNO This is typically less than 10 nanoseconds Current This is...

Page 68: ...ceiver Oscillator This field shows the regression computed system oscillator ageing rate per day Ageing Rate several hours delay before the first measurements are displayed Control Loop TAU This field...

Page 69: ...on on the various options Faults System Faults Page This page lists all possible system fault conditions of RTM3205 the Linux Subsystem the GPS Sub system and the GPS Receiver For details on each faul...

Page 70: ...tion on IPv6 see Chapter 8 IPv6 Information Network DNS Page This page shows the IP addresses of the primary and secondary domain name servers Network MAC Address Page This page shows the media access...

Page 71: ...s two Field Programmable Gate Arrays which are GPS Sub system FPGA and GPS Receiver FPGA Firmware Linux RFS Upgrade Page This page is used for upgrading the Linux RFS firmware You must be logged in as...

Page 72: ...formation on how to perform the up grade either via the network port the serial port or the HTTPS interface see Appendix B Upgrad ing The Firmware Firmware Reboot Page This page will allow you to perf...

Page 73: ...r authentication and session privacy In addition the Network Time Proto col daemon ntpd supports client server authentication security measures to deter spoofing of NTP clients by rogue NTP servers Th...

Page 74: ...les etc hosts allow and etc hosts deny which are configured using the interactive script accessconfig See Restrict Access Telnet SSH and SNMP below Insecure protocols like Time Daytime and Telnet may...

Page 75: ...ll need to edit these two files directly and then copy them to the boot etc directory See Appendix C Helpful Linux Information Using Editors Be careful to maintain the proper ownership and access perm...

Page 76: ...cond and third lines disable the localhost from making any modifications to the ntpd daemon but query access is not affected by this restriction These lines must not be removed as they are necessary f...

Page 77: ...t control their execution These are located in the etc rc d directory To disable any of these daemons issue one or more of these commands chmod x etc rc d rc snmpd chmod x etc rc d rc sshd chmod x etc...

Page 78: ...able OpenSSH for Linux As such it supports both SSH1 and SSH2 protocol versions By default only SSH2 is enabled in RTM3205 due to security issues with SSH1 For more information about OpenSSH and to ob...

Page 79: ...Be careful to maintain the proper ownership and access permissions by using cp p when copying the file At boot time it will be copied to the etc ssh directory of the system ramdisk thereby replacing...

Page 80: ...igure your NTP clients for secure MD5 authentication See Chapter 7 NTP Unix like Platforms MD5 Authenticated NTP Client Setup or Chapter 7 NTP Windows MD5 Authenti cated NTP Client Setup You can also...

Page 81: ...are planning to operate with SNMPv3 it is highly recommended that you make use of both of these resources to familiarize yourself with the agent configuration concepts SNMPv3 Security Prior to SNMPv3...

Page 82: ...en on port 161 for SNMP queries from the network management system If you would like to have it listen on another port you could edit the file and change the port number in the argument list being pas...

Page 83: ...205 enter prise MIB trap generation mechanism will only send a trap to the last declared trapsink in the file Configuring SNMPv2c Notifications and Informs To have your RTM3205 send SNMPv2c notificati...

Page 84: ...two lines to define your v3 users and their access parameters rwuser root priv 1 rouser RTM3205 auth 1 3 6 1 4 1 13827 The first line defines a SNMPv3 read write user root whose minimum security level...

Page 85: ...usmUser key lines from the file boot net snmp snmpd conf and then add new createUser lines Then reboot the system This example gives the simplest configuration to begin using SNMPv3 but doesn t make u...

Page 86: ...10 and 11 Your SNMP management station s will need to be configured to handle these hashed values Additionally in etc snmptraps conf you will need to change the setting for V3 to ON Copy snmptraps con...

Page 87: ...Configuring the NTP Server Configuring the RTM3205 as a Stratum 1 Server To configure your RTM3205 as a Stratum 1 NTP Server you must have successfully completed the Basic Installation procedures in...

Page 88: ...configure the time to live of the multicast packets The changes you make now will not take effect until you re boot the RTM3205 If you make a mistake just re run ntpconfig prior to re booting You will...

Page 89: ...t multicast address for the RTM3205 to use For broadcast mode on IPV4 networks this address is the all 1 s address on the sub net Example 111 112 113 255 On IPV6 networks there is more than one way to...

Page 90: ...r able to acquire lock on the GPS signal again it will switch back to Stratum 1 operation 2 When you want your RTM3205 to serve accurate time but you don t want to use the antenna for some reason In t...

Page 91: ...helpful people who participate in the Internet news group devoted to NTP at comp protocols time ntp Three methods of using RTM3205 with NTP clients on Unix like platforms will be described Basic This...

Page 92: ...reach count increment If you have other peers configured verify that the offset information for the RTM3205 server peer and your other peers is in agreement to within a few milliseconds assuming that...

Page 93: ...file which ntpd the NTP daemon looks for by default in the etc directo ry Assuming that you have created two trusted keys as shown in Configuring the NTP Server Using the Network Interface or Serial P...

Page 94: ...guration so be sure to run ntpconfig If you are going to use MD5 authentication your RTM3205 must have been configured to operate with authentication in the broadcast multicast mode and you must know...

Page 95: ...nticated version added in Unix like Platforms MD5 Authenticated NTP Client Setup server 192 168 1 120 key 1 Test Broadcast Multicast Restart ntpd to have it begin using RTM3205 as a broadcast or multi...

Page 96: ...rnet news group devoted to NTP at comp protocols time ntp The most common NTP client on Windows platforms is described below Information on other NTP Client software is available at endruntechnologies...

Page 97: ...hosts The second and third lines disable the localhost from making any modifications to the ntpd daemon but query access is not affected by this restriction These lines must not be removed as they are...

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Page 99: ...g script This will allow you to configure your Ethernet interface for both IPv4 and IPv6 operation You can also configure the hostname and domainname for the unit OpenSSH By default sshd is factory co...

Page 100: ...ind to any IPv6 addresses Refer to the NTP documentation for details on the interface directive IPv4 Only Protocols There are several protocols running on RTM3205 which are not IPv6 capable telnet cli...

Page 101: ...s case there is no PTP option installed Contact EndRun Technologies if you would like to obtain PTP for one or both ports In the case below PTP is installed on both ports Command installed_sw_opts RTM...

Page 102: ...on is installed in your Tycho then you can configure PTP and get status information via the command line interface To confirm whether this option is installed enter the following command Command insta...

Page 103: ...The following is a transcript of the question and answer configuration utility provided by ptpcon fig0 or ptpconfig1 The user entered parameters are underlined RTM3205 root host ptpconfig0 Precision...

Page 104: ...ct Now reboot the system by issuing this command at the shell prompt reboot PTP Status Using the Network or Serial Port The ptpstat0 or ptpstat1 command allows you to query the status of the PTP Subsy...

Page 105: ...le indicator either TRUE or FALSE TM is the PTP transmission mode either MULTICAST or HYBRID PTP Operation The RTM3205 is configured as an IEEE 1588 Grandmaster Clock default profile Verify that the n...

Page 106: ...Clock Class is UNLOCKED when the GPS Subsystem TFOM level is 9 The PTP Timescale either PTP or ARB When Time Mode is configured to PTP the clock transmits the Timescale as PTP When the Time mode is UT...

Page 107: ...s either Multicast or Hybrid Multicast Mode is the default and is de fined in the IEEE 1588 standard All packets sent from the Grandmaster are Multicast Hybrid Mode uses Multicast and Unicast In this...

Page 108: ...tocol The instructions below assume that the PTP Option has been installed on Port 0 eth0 of your RTM3205 To check see the section titled Option at the beginning of this chapter To disable the Precisi...

Page 109: ...MAC address and either ETH0 or ETH1 Integrated LEDs indicate link speed green and activity amber The green LED will pulse once for a speed of 10M twice for 100M and three times for 1G Both ports provi...

Page 110: ...PS OUTPUT is Installed Current Setting See systemio command Change the 1 PPS Pulse Width Use the systemio command to view the 1PPS pulse width Use the systemioconfig command to channge the pulse width...

Page 111: ...Connectors are identified as A B C or D Command cpuio RTM3205 reply CPU I O A AM TIME CODE OUTPUT is Installed Current Setting See systemio command Change the Time Code Format Use the systemio comman...

Page 112: ...ond resolution CR is the ASCII carriage return character 0x0D An example is shown here Command triggerppo A 13 50 00 This will cause a pulse on BNC A at RTM3205 reply OK UTC time of day 13 50 00 Trigg...

Page 113: ...or The cpuio command will list any connector on the RTM3205 that has an I O signal Connectors are identified as A B C or D Command cpuio RTM3205 reply CPU I O C DIRECT DIGITAL SYNTHESIZER OUTPUT is In...

Page 114: ...ore details see Appendix K Specifications Optional Alarm Output View the Alarm Output Connector The cpuio command will list any connector on the RTM3205 that has an I O signal Connectors are identifie...

Page 115: ...s L1 GPS timing receiver to directly measure and remove ionospheric delays in real time This unprecedented real time capability was previously only available with expensive dual frequency L1 L2 GPS re...

Page 116: ...ionospheric delay measurements with full accuracy of those measurements achieved after several days When ionospheric conditions are quiet or relatively normal this option improves the accuracy and st...

Page 117: ...ic model along with the real time corrections computed using the RTIC Option were logged With these logs the NIST timing measurements were post pro cessed to determine what the performance would have...

Page 118: ...on The string contains several pa rameters in the format shown below YYYYMMDD HH MM SS K KKKe KK V S SSSe SS where YYYYMMDD HH MM SS is the timestamp of the data K KKKe KK is the standard broadcast Kl...

Page 119: ...me ionospheric delays will not be calculated Factory default mode is ON NOTE The Real Time Ionospheric Correction Option requires a minimum of 24 hours of operation after lock to GPS to begin producin...

Page 120: ...Specifica tions 1PPS Stability RTIC Option TDEV 2 ns 105 seconds y 4 0x10 14 105 secs System Oscillator Stability Allan Deviation Table Tau in Seconds MS OCXO HS OCXO US OCXO 1 3 0x10 12 1 0x10 12 6 0...

Page 121: ...is not installed then contact EndRun Technologies About SyncE Synchronous Ethernet also referred as SyncE is an ITU T standard for computer networking that facilitates the transference of clock signa...

Page 122: ...yncestat command allows you to query the status of SyncE When the clock is locked the ESMC and syncestat will report the quality level of QL PRC and set the SSM code When the clock is not locked TFOM...

Page 123: ...as been disabled it will no longer execute However the web interface will still show SyncE and the syncestat command will still exist on the system Re Enable SyncE To re enable SyncE remove the rc syn...

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Page 125: ...oscillator Oven Controlled Crystal Oscillator OCXO The extrapolated TFOM is based on a conservative estimate of the performance of the os cillator and should be considered worst case for a typical ben...

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Page 127: ...ssword Then follow the prompts from the HTTPS interface to complete each upgrade as needed IMPORTANT The domain name server IP address is required by the Apache web server When using netconfig see Cha...

Page 128: ...ll be using later to access the RTM3205 via its HTTPS interface Use this link to get the file s you want endruntechnologies com support software upgrades rtm3205 After saving the file s use the RTM320...

Page 129: ...n When performing an upgrade you will be erasing and then copying the new image to this device First you need to download the Linux RFS firmware from the EndRun website to a place on your net work whi...

Page 130: ...ered your password the system version message will be displayed You should notice that it now indicates the software version and date of the upgrade that you previously downloaded You can also check t...

Page 131: ...e sure that you have successfully recovered If the system boots normally then you should resolve the problems with the previous root file system upgrade and re perform it Performing the Linux Kernel U...

Page 132: ...t syskernel Which should cause this to be printed to the console BOOTED KERNEL IMAGE 1 Upgrade If so and your unit seems to be operating normally you have successfully completed the kernel upgrade If...

Page 133: ...remote host to this specific file on your RTM3205 tmp subsys bin The GPS Subsystem image will be named with the software part number and version like 6010 0076 000_3 01 bin When following the instruc...

Page 134: ...file using binary transfer mode from the remote host to this specific file on your RTM3205 tmp rcvr bin The GPS Receiver image will be named with the software part number and version like 6010 0081 00...

Page 135: ...sfer the file to your RTM3205 using either ftp or scp If you are using ftp to per form the upgrade transfer the previously downloaded file using binary transfer mode from the remote host to this speci...

Page 136: ...s wait about 60 seconds and issue this command to check the FPGA version on the GPS Receiver rcvrversion You should see a message like this F W 6010 0081 000 Ver 1 04 FPGA 6020 0014 000 Ver 02 OCT 11...

Page 137: ...be able to modify any system settings or view secure files For security reasons we recommend you change the default passwords using the Linux passwd com mand see Change Password below Linux Commands D...

Page 138: ...It affects the serial port SSH Telnet and HTTPS passwd List Active Processes This command displays all active processes running in the system ps e NTP Monitoring and Troubleshooting The following com...

Page 139: ...ed on the RTM3205 file system for legacy reasons since it has been the default editor for all first and second generation EndRun Technologies products A man page for edit is resident on the system Whe...

Page 140: ...e rc M file into a location that will ensure your changes persist through a system reset Copy etc rc d rc M to boot etc rc d as shown cp etc rc d rc M boot etc rc d For more details on ethtool and how...

Page 141: ...c License is intended to guarantee your freedom to share and change all versions of a program to make sure it remains free software for all its users We the Free Software Foundation use the GNU Genera...

Page 142: ...eded to protect the freedom of users Finally every program is threatened constantly by software patents States should not allow patents to restrict development and use of software on general purpose c...

Page 143: ...SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT INDIRECT INCIDENTAL SPECIAL EXEMPLARY OR CONSEQUENTIAL DAMAGES INCLUDING BUT NOT LIMITED TO PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES LOSS...

Page 144: ...t was explicitly included in each file Copyright c 2005 2008 Kendall Correll Aidan Williams Permission to use copy modify and or distribute this software for any purpose with or without fee is hereby...

Page 145: ...ndix K Specifications assume an antenna installation with a very good view of the sky Antenna Location The location of the antenna must be chosen based on having as clear a view of the sky as possible...

Page 146: ...ismatches and discontinuities in the transmission cables All RF coax cables have a minimum bend radius In order to prevent damage cable should not be bent into tight curves It is critically important...

Page 147: ...portant for long cable runs For very long cables if the DC resistance is too high not enough voltage will be available at the end farthest from the RTM3205 where the antenna and preamplifiers are inst...

Page 148: ...shield and back up to the antenna This highlights the importance of properly constructed cable terminations and double shielded cable IMPORTANT Proper installation of two or three LNAs is critical Use...

Page 149: ...plifier The other RF output J2 is DC loaded with a 200 ohm resistor to simulate the antenna current draw When selecting and installing a signal splitter keep these points in mind 1 The splitter must b...

Page 150: ...mmended that the delay between the antenna and RTM3205 receiver input be precisely measured EndRun Part Description Nominal Delay Notes Antenna Cable 0610 0009 001 Kit with 50 15m cable 62 nanoseconds...

Page 151: ...e position or a manually entered GPS reference position If you need to provide a reference position to your RTM3205 it is best to use a previously determined position from the unit itself or a highly...

Page 152: ...R T M 3 2 0 5 U s e r M a n u a l 134 A P P E N D I X E FIGURE 1 GPS ANTENNA ROOFTOP MOUNTING HARDWARE...

Page 153: ...135 R T M 3 2 0 5 U s e r M a n u a l I N S TA L L I N G T H E G P S A N T E N N A FIGURE 2 GPS ANTENNA ROOFTOP MOUNTING HARDWARE WITH PREAMPLIFIER...

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Page 155: ...ime to time in order to keep UTC which is derived from atomic time TAI in agreement with the Earth s rotation rate Relative to TAI the Earth s rotation rate is slowing down This means that UTC must be...

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Page 157: ...efinitions System Oscillator DAC DAC This fault indicates that the electronic frequency control DAC for the oscillator has reached either the high or low alarm limit while locked to the GPS signal Unl...

Page 158: ...her system timebase clocks This is a fatal fault Please contact EndRun Customer Support GPS Antenna ANT This fault indicates that the GPS antenna or cable has a fault It indicates either an over or un...

Page 159: ...as reached the alarm limit This condition should not normally occur unless the unit is subjected to out of specification environmental condi tions Otherwise this is a fatal fault Please contact EndRun...

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Page 161: ...formation identified in B122 above this format also contains Straight Binary Seconds SBS of day SBS is provided at the end of the frame in the 17 bits starting in position 80 IRIG B120 000 IEEE Standa...

Page 162: ...cal offset binary 1 Local offset from UTC time P66 Local offset binary 2 P67 Local offset binary 4 P68 Local offset binary 8 P69 P7 Position identifier P70 Local offset half hour bit 0 none 1 half hou...

Page 163: ...option use this console port command You must be logged in as the root user in order to run this command and you must provide a license key on the command line If the key is verified then the option w...

Page 164: ...to left Currently there are only four software options defined in the RTM3205 These are for the SyncE Option the RTIC Option and PTP IEEE 1588 enabled on port 0 eth0 or port 1 eth1 The table below sh...

Page 165: ...nfusing simulation results and or improper operation when the RTM3205 is subsequently recon nected to live GPS signals Console Port Commands clearalmanac The GPS Subsystem maintains a record of the GP...

Page 166: ...past Doing so will cause the time to be set a multiple of 1024 weeks in the future relative to the simulator time If lock to the simulator is then achieved this future time will then be saved to non...

Page 167: ...prior to reconnecting to live GPS signals Failure to do so would compromise the integrity checking algorithm Issuing this command will reset the stored GPS Leap Second History to the history that was...

Page 168: ...R T M 3 2 0 5 U s e r M a n u a l 150 A P P E N D I X J This page intentionally left blank...

Page 169: ...dpass filter for out of band interference rejection Rugged all weather housing capable of operation over 40 C to 85 C MTBF 163 441 hours at 70 C Size 3 25 H x 3 0 diameter Mounting via 18 long 3 4 pip...

Page 170: ...DAYTIME server TELNET client server FTP client DHCP client SYSLOG HTTPS PTP IEEE 1588 See the Software Options section in this Appendix K SyncE See the Software Options section in this Appendix K Supp...

Page 171: ...0 0 D Weight 3 lb 1 35 kg Antenna 3 25 H x 3 Diameter Environmental Operating Temperature 0 to 50 C Storage Temperature 40 to 85 C Antenna Operating Temperature 40 to 85 C Operating Humidity 5 to 90 R...

Page 172: ...hitecture and wander performance G 8262 Timing characteristics G 8264 Ethernet Synchronization Message Channel ESMC Note See Chapter 12 Synchronous Ethernet for more information System Oscillator One...

Page 173: ...s 1 ms 100 ms 500 ms User Calibration 500 us 1 ns resolution Accuracy 10 nanoseconds RMS to UTC USNO when locked Stability TDEV 10 ns 105 seconds y 6 0x10 14 105 secs For RTIC Option see Chapter 11 Re...

Page 174: ...hapter 10 Inputs Outputs Programmable Pulse Output Optional Direct Digital Synthesizer DDS Output Signal Positive TTL pulse into 50 TTL 50 to GND VOL max 0 4V VOH min 2 4V VOH nom 2 5V VOH max 3 0V Ra...

Page 175: ...tem Oscillator Stability Allan Deviation Table above Phase Noise See System Oscillator Phase Noise Table above Alignment Not aligned with other outputs in this unit Connector Front panel SMA jack labe...

Page 176: ...dRun EndRun EndRun EndRun TECHNOLOGIES TECHNOLOGIES TECHNOLOGIES TECHNOLOGIES TECHNOLOGIES TECHNOLOGIES TECHNOLOGIES TECHNOLOGIES E ndRun E ndRunE ndRunE ndRun EndRun EndRun EndRun EndRun TECHNOLOGIES...

Page 177: ...tions Changes for Customer Requirements From time to time EndRun Technologies will customize the standard RTM3205 Precision Timing Module for special customer requirements If your unit has been modifi...

Page 178: ...R T M 3 2 0 5 U s e r M a n u a l 160 S P E C I A L M O D I F I C AT I O N S This page intentionally left blank...

Page 179: ......

Page 180: ...2270 Northpoint Parkway Santa Rosa CA 95407 TEL 1 877 749 3878 FAX 707 573 8619 www endruntechnologies com Smarter Timing Solutions...

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EndRun RTM3205, User Manual

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