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1/20/97

APPENDIX D

DETAILED DRAWINGS / BILL OF MATERIALS

Summary of Contents for IRIG NTS-100

Page 1: ...Network Time Server IRIG NTS 100 600 201 SERIAL NUMBER_______________ Revision A January 20 1997...

Page 2: ...etailed in Section 3 Ethernet Address ____________________________________ IP Address ____________________________________ Subnet Mask ____________________________________ Default Gateway ____________...

Page 3: ...ace 1 5 User RS 232 Serial I O Interface 1 5 LED Status Indicator 1 6 Optional Time Frequency Output Signals 1 6 IRIG B Time Code 1 6 1 PPS 1 6 10 MHz 1 6 Alarm Output 1 7 SECTION II 2 7 INSTALLATION...

Page 4: ...TRY REQUEST 3 16 3 32 FUNCTION 05 TIME QUALITY ENABLE SETUP 3 17 3 33 FUNCTION 08 CONTINUOUS TIME ONCE PER SECOND ENABLE 3 17 3 34 FUNCTION 09 TIME ON REQUEST ENABLE 3 18 3 35 FUNCTION 11 TIME OUTPUT...

Page 5: ...7 ntpSysHostMode 7 8 ntpSysStratum OBJECT TYPE 7 8 ntpSysPoll OBJECT TYPE 7 8 ntpSysPrecision OBJECT TYPE 7 9 ntpSysRootDelay OBJECT TYPE 7 9 ntpSysRootDisp OBJECT TYPE 7 9 ntpSysRefClockIdent OBJECT...

Page 6: ...7 17 actsBadReply OBJECT TYPE 7 17 actsNoOnTimeMark OBJECT TYPE 7 17 APPENDIX A NTP v 3 0 DATA FORMAT per RFC1305 A 1 NTP DATA PACKET A 2 SNTP V 3 0 DATA FORMAT PER RFC1361 APPENDIX B TIME PROTOCOL pe...

Page 7: ...ncy outputs whose accuracy s are commensurate with the synchronization source being input to the NTS 100 These optional outputs include 1PPS IRIG B and 10MPPS 1 2 LIMITED WARRANTY 1 2 1 Each new produ...

Page 8: ...ct to products of similar description 1 3 LIMITATION OF LIABILITY 1 3 1 By purchasing any product from TrueTime the Buyer consents to and agrees that the Buyer s sole and exclusive remedy for any dama...

Page 9: ...e input synchronization source The relative synchronization characteristics given here reflect the capabilities of the NTS 100 to preserve the time and frequency characteristics of the synchronization...

Page 10: ...ned specifically to implement the NTP server function As such it was carefully designed to operate with the TrueTime Mark III real time operating system to minimize the unknown latencies in timestampi...

Page 11: ...DI 6 GND 7 NC 8 GND 9 CI 10 DO 11 GND 12 DI 13 12V 14 GND 15 NC User RS 232 Serial I O Interface Data Time day of year through milliseconds in ASCII characters output once per second or on request Al...

Page 12: ...correspond with the Open Collector Alarm Output high impedance or Alarm state The Blinking Green condition corresponds with the Open Collector Alarm Output low impedance or Normal state Optional Time...

Page 13: ...il in Section 5 of this manual The network connection is made via the AUI connector and any required Media Access Unit MAU Once these connections have been made turn on the unit and follow the instruc...

Page 14: ...tion When the synchronization option is GPS allow at least five minutes for the NTS 100 to acquire lock Once locked the character will change to a space character the Open Collector Alarm Output will...

Page 15: ...option requires no operator input to maintain accurate UTC time and automatically handles leap second events 3 1 5 The final and most accurate option is to synchronize the NTS 100 module to the USNO b...

Page 16: ...n the NTS 100 IRIG NTS 100 ACTS or NTS 100 1PPS All functions may be accessed via the front panel keypad and viewed on a front panel alphanumeric display or accessed via the Serial I O interface and v...

Page 17: ...nput source See Section 5 of this manual for a detailed description of the status display for the synchronization input option in your unit 3 10 2 Additionally PRESSING THE STATUS BUTTON WILL ABORT AN...

Page 18: ...cursor beneath the character that you wish to edit Use the up or down arrow keys to scroll through the possible choices for that character 3 13 SELECTING FUNCTIONS AND ENTERING DATA 3 13 1 The variou...

Page 19: ...a function by pressing the TIME or STATUS button 3 16 FUNCTION 01 TIME ZONE SELECT 3 16 1 Use function 01 to enter your time zone offset The initial out of the box default is 00 00 UTC The default up...

Page 20: ...ess the up or down arrow keys to toggle between 24 and 12 When the display shows the desired format press FUNC ENTR to enter your choice 3 18 FUNCTION 03 DATE AND TIME ENTRY 3 18 1 Use function 03 to...

Page 21: ...vance to the next digit automatically Press FUNC ENTR to enter the data Only valid dates may be entered 3 19 FUNCTION 04 SERIAL I O SETUP 3 19 1 Use function 04 to configure the Serial I O port The in...

Page 22: ...w keys to position the cursor beneath the digit that you wish to change Press the up or down arrow keys to scroll through the possible digit choices Alternately directly enter the numbers using the ke...

Page 23: ...UNC ENTR then 0 6 The display will show Keypad Lock or Keypad Lock on off 3 21 3 Press up or down arrow keys to toggle between on and off When the display shows the desired choice press FUNC ENTR Afte...

Page 24: ...Address 3 24 3 Use the up and down keys to scroll among the major selections for function 36 Display Ethernet Address Clock Type Display Setup Clock Accuracy Display Setup Network Type Display Setup D...

Page 25: ...view and or change the Default Gateway of the NTS 100 unit The format of the Default Gateway display is shown here Default Gateway 255 054 000 033 Example 3 24 11 The Left and Right arrow keys move t...

Page 26: ...ices When the display shows the desired choice press FUNC ENTR to enter your choice 3 25 4 The display and all other time outputs indicate UTC without any DST adjustment if a time zone offset of 00 00...

Page 27: ...the first Sunday in April and the exit time will default to 2 00 a m on the last Sunday of October 3 25 7 The sequence of the count upon entry into DST is 01 59 58 01 59 59 03 00 00 03 00 01 assuming...

Page 28: ...igured as a DTE interface and will require a null modem for operation with a terminal or computer The default factory settings for the Serial I O port are Baud Rate 9600 Parity Even Data Bits 7 Stop B...

Page 29: ...string with the following format Sample entry F01 8 00 CR Response OK CR LF Sample Request F01 CR Response 8 00 CR LF 3 30 FUNCTION 02 12 24 HOUR FORMAT ENTRY REQUEST 3 30 1 Use Serial I O function F0...

Page 30: ...line terminator either a carriage return and line feed for output strings or a carriage return only for input strings Sample request F03 CR Response F03 UTC 01 07 91 02 48 29 CR LF Sample entry F03 LO...

Page 31: ...tab STATE ON or OFF FLAG one error threshold in nanoseconds 1 to 11 digits with or without leading zeros LT line terminator either a carriage return and line feed for output strings or a carriage retu...

Page 32: ...equal to threshold 4 3 33 2 Refer to serial I O function 13 WORST CASE TIME ERROR REQUEST The carriage return character CR start bit begins on the second 0 to 1 bit time or 1 ms which ever is larger...

Page 33: ...fore power down To request the return of the present format send F11 CR to the Serial I O port The string returned will contain X s in the positions that are omitted in the time output string 3 35 3 W...

Page 34: ...F11 SEP is one character only either a space comma or tab Any character other than an upper case X in a numeric position will not affect the output of that position The colons or decimal point however...

Page 35: ...SOH DDD HH MM SSQ CR LF F09 string output SOH DDD HH MM SS mmmQ CR LF 3 36 FUNCTION 13 WORST CASE TIME ERROR REQUEST 3 36 1 Use Serial I O Function F13 to request the estimated worst case time error...

Page 36: ...ing the network related fields of the configuration will cause a reset of the NTS 100 module Ethernet Address 3 38 2 The ethernet address is a six byte hexadecimal value specific to each NTS 100 modul...

Page 37: ...ult Gateway 3 38 9 To obtain the default gateway of the NTS 100 module send the string F36 G CR 3 38 10 The unit will respond with F36 G nnn nnn nnn nnn CR LF 3 38 11 To set the default gateway and re...

Page 38: ...54 0 21 SM 255 255 255 240 G 206 54 0 17 N E CR 3 38 20 This example provides the NTS 100 card with an IP address Subnet Mask Default Gateway and Network Type Note that leading zeros may be omitted w...

Page 39: ...tting and operator attempts to set it will be ignored 3 39 FUNCTION 66 DAYLIGHT SAVINGS ENABLE 3 39 1 Use Serial I O Function F66 to enable or disable or set the entry or exit times for DST The initia...

Page 40: ...IN DAY day of week to enter DST 1 through 7 where Sunday is 1 IN MONTH month to enter DST 1 through 12 where 1 is January OUT HOUR hour to exit DST in 24 hour format OUT WEEK which week to exit DST 1...

Page 41: ...0 module will return F67 06 30 96 1 CR LF 3 40 3 This response indicates a leap second addition during the last minute of June 30 1996 If there is no leap second pending the module will return F67 non...

Page 42: ...1 20 97 N NT TS S 2 20 01 1 M MA AN N 4 4 1 1 R Re ev v A A 4 SECTION IV NOT USED...

Page 43: ...imate time then press FUNC ENTR 5 1 6 Using Serial I O F03 in this manner does not affect the time Only after the date has been entered will the NTS 100 indicate a lock to the incoming IRIG B time cod...

Page 44: ...ecify the accuracy of the clock which is being used to generate the IRIG B code Refer to Section 3 Function F36 and Appendix A for more detail on the setting of this parameter 5 1 10 In addition if th...

Page 45: ...1 20 97 N NT TS S 2 20 01 1 M MA AN N 5 5 3 3 R Re ev v A A 5 1 15 To set the IRIG Lock Quality send a string of the form F36 IQ setting CR LF 5 1 16 F36 IQ None CR LF Example...

Page 46: ...ble of many possible MD5 keys A key is an ASCII alpha numeric character string that is from 1 to 31 characters in length The key is most secure when all 31 characters are filled with numbers and lette...

Page 47: ...l that time The Back one menu choice returns to the previous menu 6 3 3 Pressing the Modify MD5 keys menu takes you to the MD5 Edit Menu In this menu you may choose 1 Edit a Key 2 Add a Key 3 Delete a...

Page 48: ...meric strings and the keypad interface does not allow easy entry of alpha characters You may add delete and view the MD5 keys using the serial interface 6 4 2 To view a particular NTP MD5 key type F36...

Page 49: ...R Re ev v A A 6 4 8 To delete a NTP MD5 key type F36 MD x Where x is the key identification number ranging from 1 to 4294967295 The unit will respond with OK 6 4 9 To delete all NTP MD5 Keys type F36...

Page 50: ...nition of SNMPv1 RFC 1213 definition of MIB II and RFC 1354 IP Forwarding table addition to MIB II All RFCs are published with approval by the Internet Activities Board and they are readily found on t...

Page 51: ...he list of hosts that SNMP trap messages are sent to no matter what the state of Use Trusted IP flag is Use Trusted IP If this flag is set to yes then the Trusted IP Address table is used in addition...

Page 52: ...is leads back to the main SNMP function window Save settings When SNMP Global Enable Traps is changed this becomes visible and answering yes immediately saves the change to TrueTime s SNMP Answering N...

Page 53: ...gle through your settings options The left and right arrow keys move between digits and letters within an address or a string Note because the keypad has only numbers on the front panel the letters fo...

Page 54: ...apMsg 1 trapMsgNtpAlarm OBJECT TYPE SYNTAX DisplayString SIZE 0 255 ACCESS read only STATUS mandatory 7 5 3 This is an ASCII string sent to UDP port 162 or user defined when the TrueTime time server s...

Page 55: ...6 2 Total number of NTP packets delivered to the NTP application layer from the transport layer ntp 1 ntpOutPkts OBJECT TYPE SYNTAX Counter ACCESS read only STATUS mandatory 7 6 3 Total number of NTP...

Page 56: ...ry synchronization is lost this value will slowly increase with time as the time server s oscillator flywheels away from true time Should ntpEstError be greater than ntpDesiredAcc the NTP alarm condit...

Page 57: ...hat ranges from 1 to 255 indicating the stratum level of the local clock Note A primary time server sets outgoing NTP packets stratum field and ntpSysStratum to 1 ntp 9 ntpSysPoll OBJECT TYPE SYNTAX I...

Page 58: ...n and skew Note A primary time server s outgoing NTP packet will have its root delay field set to ntpSysRootDelay ntp 12 ntpSysRootDisp OBJECT TYPE SYNTAX COUNTER 0 4294967295 ACCESS read only STATUS...

Page 59: ...packet will have its reference identifier field set to ntpSysRefClockIdent ntp 14 7 7 THE NTSCONTROL GROUP PRELIMINARY 7 7 1 This group allows for complete control of TrueTime s products This group em...

Page 60: ...eserver if it is connected to the Internet As a security precaution the timeserver can turn on off the remote configuration feature only through the keypad ntpControlInput OBJECT TYPE SYNTAX DisplaySt...

Page 61: ...d only STATUS mandatory for GPS capable units 7 8 4 Current number of GPS satellites used in position and time fix calculations The number of satellites available depends on how long the time server h...

Page 62: ...erence ellipsoid is a rotated ellipse that is centered on the Earth s center of mass The surface of the ellipsoid is not necessarily the same as sea level The ellipsoid surface may be as much as 100 m...

Page 63: ...es gpsLatitude 90 2 31 1 latitude in degrees Note latitude varies from PI 2 to PI 2 in radians and 90 to 90 in degrees gps 8 7 9 ACTS GROUP VARIABLES 7 9 1 The ACTS group is present in all TrueTime ne...

Page 64: ...ting for the ACTS modem The ACTS dial up service accepts 300 or 1200 baud Note this is a rare case where faster is not better and 300 baud yields the best time accuracy acts 2 actsFailRedial OBJECT TY...

Page 65: ...S mandatory for ACTS capable units 7 9 8 Number of times the time server called the ACTS dial up service and successfully received the time acts 7 actsBadCalls OBJECT TYPE SYNTAX COUNTER 0 4294967295...

Page 66: ...OBJECT TYPE SYNTAX COUNTER 0 4294967295 ACCESS read only STATUS mandatory for ACTS capable units 7 9 13 Time server s internal modem found ACTS line busy acts 12 actsNoAnswer OBJECT TYPE SYNTAX COUNTE...

Page 67: ...1 20 97 N NT TS S 2 20 01 1 M MA AN N 7 7 1 18 8 R Re ev v A A 7 9 16 The reply from remote modem had no on time mark possibly due to line noise acts 15...

Page 68: ...ear codes and their corresponding meanings are shown in the table below Bit 0 Bit 1 Meaning 0 0 Normal Operation 0 1 61 second last minute 1 0 59 second last minute 1 1 Clock not synchronized A 1 3 Th...

Page 69: ...esolution of the NTS 100 which is 10 s So the precision byte is set to 16 which is equivalent to a precision of 15 26 s Synchronizing Distance Root Delay Version 3 A 1 9 The root delay is a signed 32...

Page 70: ...was present Originate Timestamp A 1 13 The originate timestamp is a 64 bit timestamp format representing the time that the request left the client host Receive Timestamp A 1 14 The receive timestamp i...

Page 71: ...to the time that the reply left the NTS 100 server host Receive Timestamp A 13S This filed is set to the time that the reply left the NTS 100 server host Transmit Timestamp A 15S This field is set to...

Page 72: ...3 When used via UDP the TIME service works as follows Server Listen on port 37 45 octal Client Send an empty datagram to port 37 Server Send a datagram containing the UTC time as a 32 bit binary numb...

Page 73: ...B is divided into three segments The first segment encodes time of year in binary coded decimal BCD notation The second segment encodes control functions This segment is generally available for data...

Page 74: ...nt P5 70ms is a binary 1 when the worst case time error exceeds threshold 2 Element P5 80ms encodes a binary 1 when the error exceeds threshold 3 and P5 90ms when the error exceeds threshold 4 Figure...

Page 75: ...1 20 97 N NT TS S 2 20 01 1 M MA AN N C C 1 1 R Re ev v A A APPENDIX D DETAILED DRAWINGS BILL OF MATERIALS...

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