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Microsemi Corporation (Nasdaq: MSCC) offers a comprehensive portfolio of semiconductor and system solutions for aerospace & defense, communications, data center and industrial markets. Products include high-performance and radiation-hardened analog mixed-signal integrated circuits, FPGAs, SoCs and ASICs; power management products; timing and synchronization devices and precise time solutions, setting the world’s standard for time; voice processing devices; RF solutions; discrete components; enterprise storage and communication solutions, security technologies and scalable anti-tamper products; Ethernet solutions; Power-over-Ethernet ICs and midspans; as well as custom design capabilities and services. Microsemi is headquartered in Aliso Viejo, Calif., and has approximately 4,800 employees globally.

. XL-GPS Time & Frequency System User Guide 997-01530-01, Rev. C, January 2008.

All rights reserved. Printed in U.S.A. All product names, service marks, trademarks, and registered trademarks used in this document are the property of their respective owners. The manual’s contents do not apply to previously released versions of XL-GPS hardware or software. Finding Answers to Product Questions.

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Viii 1: Overview of the XL-GPS Time and Frequency Receiver.1 Product Description and Features. Rack Mounting the XL-GPS.

Specifications.109 7: XL-GPS-Generated Messages.111 Error Messages. New Top Level Structure of Enterprise MIB for XL-GPS.124 XL-GPS System Group.126 The XL-GPS Fault Group.

F: World Map of Time Zones.141 G: Part Names. 997-01530-01, Rev. C-25, Jan 2008. By purchasing any product from Symmetricom, the Buyer consents to and agrees that the Buyer’s sole and exclusive remedy for any damages or losses incurred by the Buyer as a result of Symmetricom’s breach of its one-year Limited Warranty for defects in materials and workmanship or otherwise in connection with any claim respecting the product shall be limited to the repair or replacement of the product or a refund of the sales price of the product.

Abut this Manual This manual is subject to change without notice. Symmetricom can not be held responsible for any errors or inaccuracies in this manual. Please notify the Customer Assistance team of any suggested improvements or corrections. 1: Overview of the XL-GPS Time and Frequency Receiver Product Description and Features The XL-GPS Time and Frequency Receiver is high-precision time and frequency system that generates time and frequency outputs from its GPS-disciplined system clock. When locked to Symmetricom’s timing-optimized GPS receiver, the XL-GPS provides 1x10 30 nS RMS accuracy to UTC. 1 MPPS.

5 MPPS. 10 MPPS.

Optional Programmable Pulse. Optional Alarm Relay In addition, the following software-enabled optional features can be purchased and enabled using a software key at any time:. Network Time Server (NTS). 2: System Specifications Chassis The chassis is a 19-inch rack-mounted 1U chassis. Size: Weight: Standard Hardware: Optional Hardware: Environmental Operating Temperature: Storage Temperature: Humidity: Vibration - Operating: Vibration - Storage Transport: Time and Frequency Accuracy GPS Reference Time and frequency accuracy/stability while locked to a GPS timing reference: 1 PPS Output Frequency Output Accuracy: Frequency/Timing Allan.

AC Power Supply Input Input connector Input voltage range Input frequency range Standard I/O The following specifications apply to the connectors on the Main CPU card. RS-232/RS-422 Interface The standard serial data port is a bi-directional EIA standard RS 232C interface. The serial data port is configurable via the Keypad and Network Port.

Network Port 10/100 The Ethernet port interface is: Type: Frame format: J1 - Optional TI/ET The TI/ET configuration is via the Keypad, Serial I/O, and Network port. J1 accepts an external 1 PPS or Event input signal and measures it against the system-derived time. The a minimum pulse width of the input signal is 100 nS. 1 us resolution. Pulse width: On time edge: Amplitude: J3 – Optional Frequency Measurement The Frequency Measurement (Freq Meas) option: measures an external frequency applied to the J3 input relative to the XL-GPS’ disciplined frequency. Frequency: Resolution Range Impedance: Factory Configuration.

Code Out The default output is IRIG-B-120 AM. Configuration is via the Keypad, Serial I/O, and Network port.

Format: Amplitude (AM): Ratio (AM): Amplitude (DC): Qty: Connector: Phasing: Accuracy: Five flags are encoded in the control function segment of the IRIG B code. The first flag encoded at element P5+40ms is the LOCK indicator.

GPS Time and Frequency Reference GPS Time and Frequency reference configuration is via the Keypad, Serial I/O, and Network port. Frequency: Code: Tracking: Position Accuracy 1 PPS Accuracy: Time standard: Antenna input: Antenna power: Options Expansion Module (87-8034) The expansion module provides four independently-configurable outputs. The outputs are configured using jumper/switch settings on the Expansion Module. Max Current: The standard network interface of the XL-GPS can be optionally enabled at the factory, or by the user in the field, to become a Network Time Server (NTS) to client clocks over a network.

Time is acquired from the host clock and distributed over the network using the Network Time Protocol (NTP). Support for version 3.0 of the NTP, RFC 1305 as well as the Simple Network Time Protocol (SNTP), RFC1361 is available. In addition, the NTS will respond to TIME protocol requests, RFC868. The NTS will respond to time synchronization requests from hosts using these User Datagram Protocol/ Internet Protocols (UDP/IP): NTP ver. Oscillators Standard TCVCXO Accuracy: Frequency/Timing Stability (Allan Deviation) Temp Optional OCXO Accuracy: Frequency/Timing Stability (Allan Deviation) Temp Drift rate Certification C-UL Calibration Statement This unit does not contain user-serviceable parts and does not require calibration. 997-01530-01, Rev.

C-25, Jan 2008 f100 ic f100 IP:192.168.46.150 SM:255.255.255.0 G:192.168.46.1 Network port session: WELCOME TO SYMMETRICOM NETWORK INTERFACE! USER NAME: operator PASSWORD:. NETWORK INTERFACE 192-8001 ALL RIGHTS RESERVED LOGIN SUCCESSFUL! f100 ic f100 IP:192.168.46.150 SM:255.255.255.0 G:192.168.46.1 NOTICE: UTILITY MONITOR SESSION HAS TAKEN PRIORITY FROM THIS TELNET SESSION!. 5: Function Reference Function Summary The following summary lists all the XL-GPS functions, identifies the user interfaces from which each one is available, and provides a brief description of the function. Available from: K = keypad, N = Network Port (Telnet), S = Serial Port Function F1 –. View the status of the factory mode jumper, which is used by factory technicians.

Not of interest to most end users. N, S Reboot the XL-GPS N, S Change the XL-GPS password N, S Ping from the XL-GPS to another host on the network N, S Change the User Name. K, N, S Configure the J2 output connector K, N, S Configure the J3 input connector Set the brightness of the display on the XL-GPS’s front panel K, N, S View some of the factory settings such as the serial. = carriage return character = line feed character For example, to set the time zone offset, enter: F1 –8:00 XL-GPS responds: OK To verify the change, enter: F1 XL-GPS Responds: F1 –8:00 F2 – 12/24 Hour Format Use function F2 to apply a 12 or 24-hour format to the time output by:. “249:10:21:34” once in the morning, and once at night. The factory settings for F2 are 24-hour format for the display and 24-hour format for IRIG (F90) Command Line To display the current hour format, send: F2 XL-GPS responds: F2DI where: = ASCII character F.

= Function number. F3 for up to 8 seconds until the XL-GPS re-synchronizes to the reference source’s time. The XL-GPS will make this switch to and from F3’s time without generating an alarm.

In NTP, for example, this means that incorrect time information could be distributed in NTP packets that are marked as having the valid time. = line feed character. For example, to display the date and time, send: F3 XL-GPS responds: F3 UTC 00:05:34 To set the time and date, send: F3 UTC 18:20:30 Note: Only valid times and dates are accepted. (the DAC value) that was being applied to the oscillator before the timing reference became unavailable. As the estimated time error grows, exceeding the threshold of the four Time Quality Flags set in F5, the XL-GPS outputs four 997-01530-01, Rev.

C-25, Jan 2008. In addition, a time quality indicator is encoded in outputs of the IRIG-B AM or DC Expansion module (see “F90 – Code Output Configuration” on page For more information on time quality indicators, see The XL-GPS accepts threshold values from 200 nS to 0 nS. The factory settings for F5 are as follows:. OK F6 – Keypad Lock F6 – Keypad Lock enables or disables the keypad, preventing accidental changes to the XL-GPS’s settings. When enabled, the display responds ‘KEYPAD LOCKOUT BY FUNC 6’ when the user attempts to access any function other than F6. F6 remains available through the keypad at all times. The factory setting for F6 –.

F2, F11, and F69. If F8 is used following startup, while the XL-GPS is acquiring a reference source, F8’s displays time-of- year information from the XL-GPS’s unsynchronized system clock.

When the system clock acquires a. In the first two lines above, the unsynchronized time is followed by a “?” time quality character. In this case, the “?” indicates that the XL-GPS is unlocked to a reference source. As the XL-GPS locks to the reference source, the “?” disappears, and after a couple seconds, the new synchronized time-of-year information appears.

XL-GPS by entering an upper case “T”. The XL-GPS saves the current time-of- day, accurate to within 1ms, to a buffer, and then outputs it to the command line interface. The XL-GPS will continue to provide the time-of-day each time it receives a “T” until F9 is cancelled.

To cancel this function, enter Ctrl-C on your keyboard. For example, to prepare Time on Request, enter: F9 Then, to request the current time, enter SHIFT-T on your keyboard. (“T” does not appear on the command line).

XL-GPS responds: 128:20:30:04.357. To exit F9 press Ctrl-C on your keyboard. 997-01530-01, Rev. C-25, Jan 2008. F11 – Time Output Format Use function F11 to review or change the format of the time output string used in F8 and F9. The as- shipped factory setting for F11 format is null, which enables F8’s and F9’s default time output formats.

The default format for F8 –. To see the Time Output Format, enter: F11 XL-GPS responds: F11 DDD:HH:MM:SS.mmmQ To remove the day, hour, minute, second, microsecond, or a character from the time output format (other than the ASCII or characters), enter the following string replacing the character you want to remove with an “X”. Time error begins to accumulate when the receiver loses lock to a reference source.

The XL-GPS calculates the worst-case time error based on the stability of system clock’s oscillator type, and the time elapsed since loss of lock. XL-GPS responds (example): F13 TIME ERROR -0.002932863 F18 – Software Version Request Use function F18 to display the current firmware version numbers of the firmware in the XL-GPS:. Bootloader. Software (firmware). File System.

Project Rev #. Command Line Use the following format to display the current settings display the current position for the GPS receiver in LLA coordinates: F50LLA XL-GPS responds with the coordinate information in the following format: F50d'd' 997-01530-01, Rev. C-25, Jan 2008. F50 LLA XL-GPS responds (example): F50 N 38d23'51.3' W 122d42'53.2' 58m To display the present antenna position using ECEF XYZ coordinates in meters, use the following format: F50XYZ XL-GPS responds using the following format: F50mmm 997-01530-01, Rev. C-25, Jan 2008. For RG-58: multiply the cable length by 1.4 ns/ft. To get the value for F51.

Don’t use function F51 to adjust the XL-GPS’s timing outputs; use F52 Distribution Cable Delay instead. Command Line Use the following format to display the current Antenna Cable Delay setting: F51. Use function F52 to display or set the distribution cable delay for the standard CODE (time code) and 1 PPS outputs. F52 compensates for the signal’s travel time from the XL-GPS to its point of use.

The distribution cable delay applies uniformly to all output ports. The as-shipped factory setting is +0 ns. The range of possible values is +999,999 ns to –999,999 ns. RG-59 – approximately 1.24 ns/foot Command Line To display the current distribution cable delay, enter: F52 The XL-GPS responds using the following format: F52ns where: = ASCII character F (f or F for input string). = the function number. Select “Dynamic Mode” if the position of the receiver is subject to frequent change, or if it is in continuous motion.

For example, use Dynamic Mode when the XL-GPS is used in mobile vehicles such as ships, land vehicles, or aircraft. With Dynamic Mode selected, the receiver updates the position information repeatedly to arrive at the best time calculations for a mobile environment. Use function F60 to display the identification number and signal strength of tracked or current satellites. ‘Tracked’ means a satellite’s signal is being received and interpreted by the receiver (or that the XL-GPS has GPS data that suggests this satellite should be visible to the antenna). Current: the XL-GPS is using the satellite’s GPS signal to calculate time and position. Bad: the GPS satellite is transmitting information that it has been removed from service. Rejected: the XL-GPS M12 receiver’s TRAIM feature has detected anomalous signals from this satellite and has quarantined it from the timing solution for 12 hours.

F60 prn1 good current F60 prn2 good current F60 prn3 good current F60 prn4 unknown F60 prn5 unknown F60 prn6 unknown F60 prn7 unknown F60 prn8 good current F60 prn9 unknown F60 prn10 unknown F60 prn11 unknown F60 prn12 unknown F60 prn13 good current F60 prn14 unknown F60 prn15 unknown. Command Line To display the current status of F66, enter a command using the following format: F66 F66 responds using the following format: F66 where: = ASCII character F = function number = ASCII space character one or more. = Off or Manual. Meaning that Local time will enter DST on the last week of the month.

All other parameters remain unchanged. The XL-GPS automatically reboots when the user changes the DST entry/exit times in F66. If any of the items in an input string are invalid, an error message will be returned. F69 – Time Mode Use function F69 to select the time type displayed by:. The XL-GPS’s front panel display.

“F8 – Continuous Time Once-per-Second” on page 42. “F9 – Time On Request” on page 44. “F90 – Code Output Configuration” on page 72 Select between the following types of time:. For example, enter: F69 XL-GPS gives one of the following responses: F69 GPS F69 UTC F69 LOCAL F69 STANDARD To set the time mode, enter a command using the following format: F69 where: = ASCII character F. The phase is the instantaneous error in seconds between the oscillator and the control loop zero servo point. The frequency offset is computed using an averaging time that is equal to the effective averaging time of the oscillator controller.

The oscillator Drift Rate is computed using a 24-hour average and is the daily Drift Rate of the oscillator. The following table summarizes F73’s alarm indicators and parameters, as well as the factory settings for an XL-GPS without options. The factory settings vary depending on the options included at the XL- GPS at the time it ships from the factory. Upate the alarm settings when adding or removing the expansion module from the XL-GPS. Indicator/Parameter Name Clock Status 1st Time Lock Time Error Time Threshold LED Blink Timeout Timeout Delay Power-On Alarm Suppress Clear Alarm Latch Alarms - General Information With Alarm Disabled, an F73 indicator does not trigger and alarm when it enters an Unlocked or Fault state. Alarm Definitions Clock Status Locked: The XL-GPS clock is locked to the GPS reference source and is operating within the F73 Time Error Threshold. Unlocked: Check the other alarm indicators to determine the cause of the problem.

Locked: The clock PLL is locked and operating nominally. The factory default setting is 300 seconds (five minutes). When that interval ends, current and new alarms are reported normally. OK: NTS is operating nominally.

Fault: NTS is not operating correctly. Contact Symmetricom Customer service. See Customer Assistance” on page Clear Alarm Latch Use Clear Alarm Latch after troubleshooting or fixing the cause of an alarm so new alarms can be distinguished from previous ones.

Save Changes Yes: Applies all user-entered changes to the F73 configuration. No: Clears all user-entered changes and exits the function. Keypad The Alarm Latch asterisk is not the same as the “reference source unavailable” asterisk that can Note: sometimes be seen on the STATUS display. Command Line To query the status of F73, enter: F73.

= '-' Future Use To display the latched faults, enter: F73 LATCH The XL-GPS responds in the following format: F73LATCH The values in field indicate the latched faults, if any, which have occurred since the last time Alarm Latch was cleared. To enable ('E'), disable (‘D’), or leave the indicator unchanged (‘-’), enter 'E', 'D', or '-' for each character in when you enter the following string: F73MASK The XL-GPS will sets the new alarm mask and responds: OK The following summarizes the fault alarm mask setting in the field.

is the time error threshold in nanoseconds, between 0 and 9999. Scream bloody gore rar. To set Time Error Threshold, enter a string the following format: F73THRESHOLD The XL-GPS will set the new time error threshold and returns the following string if the command is successful. To set the SUPPRESS enter a command using the following format: F73SUPPRESS The seconds can be set to any value from 0 to 86400.

The XL-GPS responds: OK F90 – Code Output Configuration Use function F90 to select AM or DC modulation of the IRIG-B time code on the following outputs:. “F2 – 12/24 Hour Format” on page 35.

“F69 – Time Mode” on page 61 UTC, and TAI. Command Line To display the current settings, enter: F90 XL-GPS responds using the following format: F90IRIG-B where: = ASCII character F. = function number. NTP & SNMP parameters, changing the user name/password, resetting the unit, and pinging other network devices. Warning: The F100 commands have the capacity to remove the XL-GPS from the network and disable the XL-GPS’s system firmware. Use judiciously.

The following table gives the command line equivalents for each of the preceding parameters: Description “F100” followed by: Ethernet address (MAC address) IP Address Subnet Mask Default Gateway IP Address, Subnet Mask, and Default Gateway 10 100 BASE-T BASET Remote Lockout L (for status), LOCK, UNLOCK Displays and configures Flash CRC Serial. Address is not the same thing as an IP Address), a fixed, six-byte, hexadecimal value specific to the unit’s standard network port. The first three bytes are registered to Symmetricom Inc.; the last three bytes are the hex value identifying the network port. PLEASE WAIT To obtain the IP address of the unit Standard network port, enter: F100 IP XL-GPS responds (example): F100 IP 206.54.0.21 The three commands, F100 IP, F100 SM, and F100 G, can be concatenated to set all three values simultaneously.

= dotted decimal address (0 to 255) = input line terminator For example, enter: F100 SM 255.255.255.240 XL-GPS responds: OK RESETING THE UNIT PLEASE WAIT To obtain the Subnet Mask of the unit Standard network port, enter: F100 SM. = dotted decimal address (0 to 255) = input line terminator For example, enter: F100 G 206.54.0.17 XL-GPS responds: OK RESETING THE UNIT PLEASE WAIT To obtain the Default Gateway of the unit Standard network port, enter: F100 G. BASET = specify Base-T command = input line terminator XL-GPS responds: F100 BASET 10T To set the Ethernet port to automatically negotiate the maximum connection speed, enter: F100BASETAUTO To set the Ethernet port’s connection speed to 10Base-T, enter: F100BASET10. To users on the serial port, XL-GPS responds: OK Or, to users on the network port, XL-GPS gives the following response and then closes the port: GOODBYE.

To unlock remote lockout, use the command line interface on the serial port to enter: F100 UNLOCK. XL-GPS responds: F100 L LOCKED F100 L UNLOCKED F100 ST – Self Test Status Use function F100 ST to display whether the Self Test Status parameters passed or failed. The parameters include: flash-memory checksum test, nonvolatile (NV) RAM, Serial Port, and version check.

F100 BH / Use UNIX style forward slashes ‘/’ in path and do not describe the drive (for example, ‘C’) in the path. For example: F100 BH 10.1.7.20 symmetricom/XL-GPS/192-8001.bin XL-GPS responds: BURN HOST IS READY!!!. To write the BootLoader to the flash, send the F100 BH command with the FTP host, file path and name, and then enter: F100 BUB XL-GPS responds: OK For example: f100 bub BURNING FILE 192-8000.bt WITH SIZE 452164 TO PARTITION:0 SECTOR:0. Use function F100 BF to burn file system when upgrading firmware, to write a file system to the flash memory. To write the file system to the flash, send the F100 BH command with the FTP host, file path and name, and then enter: F100BF XL-GPS responds: OK For example: f100 bf BURNING FILE 192-8002.fs WITH SIZE 524288. FLASH SUCCESSFULLY PROGRAMMED To load the FPGA program from the target flash to the FPGA, a reboot of the XL-GPS is required for the new FPGA program to take effect. The XL-GPS can be rebooted via power cycle or by issuing the F100 K I L L command on the serial port interface.

See “A: Using F100 Configuration” on page 114. NTP is an optional feature. If purchased at the same time as the XL-GPS, it comes enabled on the system.

To purchase this option after you have purchased the XL-GPS, contact Symmetricom Sales. With this jumper installed, the operation and integrity of the XL- GPS are compromised. Warning: Do not run the XL-GPS with the jumper, unless specifically directed to do so by a qualified Symmetricom technician. To test the state of the factory mode jumper: F100J. In a network port session, rebooting the XL-GPS terminates the network port session; open a new network port session when the XL-GPS has finished rebooting. In a serial port session, the XL-GPS displays text similar to the following example when the XL-GPS has finished rebooting and is ready to receive additional commands: SYSTEM POWER ON SELF TEST RESULTS.

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Valid password size is from no characters to 64 characters. If more than 64 characters are entered, F100 P truncates the string to 64 characters.

When selecting a password, use appropriate levels password security for the XL-GPS’s operating environment. Examples include:.

The unit responds (example): PING 206.254.000.021: REMOTE HOST FOUND. PING 206.254.000.021: REMOTE HOST NOT FOUND. To test if the XL-GPS’s network port has a good connection, enter the following using in a serial port session: f100 PI XL-GPS responds: PING: REMOTE HOST FOUND. Reboot the XL-GPS using the. Immediately press the MENU key on the keypad and hold down while the XL-GPS is rebooting.

The XL-GPS will display will ‘hang’ while displaying “BOOTING”. After a few moments, release the MENU key. Time Interval - Event Time (TIET) is an optional feature. If purchased at the same time as the XL- Note: GPS, it comes enabled on the system. To purchase this option after you have purchased the XL- GPS, contact Symmetricom Sales. See 997-01530-01, Rev. C-25, Jan 2008 “Oscillators” on page.

F110 performs two separate functions:. Configure the J1 input port for a TIET signal.

Display TIET information. Keypad. J1 Input Config: Displays “DISABLE” if the function has not been purchased and installed. Displays “TIET” if the TIET option has been purchased and installed. = line terminator, either a carriage return and line feed for output strings or a carriage return only for input strings. Sample request: F110 XL-GPS responds (example): F110 TIET 50 POSITIVE To the configure TIET input with a different impedance value, enter (example): F110 TIET 100K POSITIVE XL-GPS responds: OK. 100 PPS, 1 kPPS, 10 kPPS, 1 MPPS, 5 MPPS, 10 MPPS, or PPO.

The default factory setting is 10 MPPS. PPO is an optional feature. If purchased at the same time as the XL-GPS, it comes enabled on Note: the system.

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= Line terminator: a carriage return and line feed for output strings, or a carriage return for input strings Sample request: F111 The XL-GPS displays a fixed 10 PPS rate output (example): F111 RATE 10PPS. Or, displays the PPO settings (example): F111 PPO 120:22:00 120:22:03 Setting the J2 Output Configuration To set the J2 Output Configuration, send a character string with the previously defined F111 entry format to the Serial/Network port. For example, to produce a a single pulse with duration of 1 second on January 1, enter: F111 PPO 001:00:00 001:00:00 XL-GPS responds: OK Or, for example, to produce a single pulse with duration of 1 microsecond on January 1, enter: F111 PPO 001:00:00. μS pulse period with 5 F111 PPO XXX:XX:XX:XX.XXXXX0 XXX:XX:XX:XX.XXXXX5 XL-GPS responds: OK Or, for example, to produce a repetitive 50-microsecond pulse occurring every 100 microseconds (i.e., repetitive pulses with 10 kPPS frequency with the start time or rising-edge at 5 falling-edge at 55 μS. XL-GPS responds: OK F113 – J3 Input (Freq Meas) Frequency Measurement is an optional feature.

If purchased at the same time as the XL-GPS, it Note: comes enabled on the system. To purchase this option after you have purchased the XL-GPS, contact Symmetricom Sales.

Theory of Operation: Freq Meas uses a heterodyne phase error multiplier to achieve high resolution at short sample periods. Using its internal disciplined frequency, the XL-GPS records or timestamps the zero crossing of the J3 input frequency once per measurement cycle with 240 picosecond resolution. Or, to enable Freq Meas of a 1 MHz input with a 50 Ω input impedance every 1 seconds, enter: F113 FREQ MEAS 1MHZ 50 1 To all three of the above examples, XL-GPS responds: OK If enabling Freq Meas, display the Freq Meas measurements using the following format: F113SHOW. Note: Changing the function on the front panel or command line terminates Freq Meas.

F117 – Factory Configuration Use function F117 to display the XL-GPS factory Serial Number and the availability optional software features. Send the string: F117 XL-GPS responds: F117SN. = carriage return. = ENABLE or DISABLE = line feed.

For example, enter: F117 XL-GPS responds: F117 SN 31234 NTP ENABLE FREQ MEAS ENABLE TIET ENABLE PPO ENABLE F119 – GPS Receiver Configuration Summary Use function F119 to query and configure the F119 provides the following GPS receiver information:. GPS status can be “Locked” before the GPS receiver is a valid time reference. This is explained Note: below. The GPS receiver serves as a UTC time reference for the XL-GPS system clock. To be a valid time reference, the receiver requires the following information:. GPS satellite visibility and signal strength affect the ability of the GPS receiver to lock and provide Note: valid time to the XL-GPS.

Therefore, it is very important to select the best possible antenna site and follow the recommendations in sections. Dynamic Mode: The position is being resolved on an ongoing basis. Command Line To obtain the status of the GPS Receiver, enter: F119S For example, enter: F119 S XL-GPS responds (example): F119: GPS PART NUMBER 87-8028-2 SOFTWARE 230-01510-04v1.9 FPGA 230-01510-01. F126 – Options Key Entry Use function F126 to enter the Options Key, which enables certain functions (e.g., PPO, TIET, NTP, FREQ MEAS) if the correct key is entered. To check the status of these XL-GPS options, see Factory Configuration” on page To set the Options Key code, enter the following: F126. 6: GPS M12 Receiver (87-8028-2) Introduction The optional GPS M12 Receiver acts as a Stratum 0 timing reference source to the XL-GPS Time and Frequency System. It tracks up to 12 L1 GPS satellites, decodes their signals for time and position, and feeds this data to the XL-GPS through the internal backplane.

“F51 – GPS Antenna Cable Delay” on page 52. “F60 – GPS Receiver Satellite List” on page 56. “F69 – Time Mode” on page 61. “F73 – Alarm Control / Status” on page 64. “F90 – Code Output Configuration” on page 72. Recovery Action: Consult the manual for the correct command and re-enter. ERROR: Can’t create netdevice The XL-GPS can not create the device needed to map the host to a drive.

Recovery Action: Restart the Unit. If this error message persists, contact Symmetricom Technical Customer Service. Recovery Action: Verify correct parameter values. If correct, restart the XL-GPS. If this error message persists, contact Symmetricom Technical Customer Service. ERROR: Action (get or set) is not specified You have omitted the “get” or “set” parameter from the F100 NTP Configuration command.

Information was successfully transferred to the destination file. Restarting the Unit Please wait A command has just been executed that requires a soft restart of the XL-GPS. The restart happens immediately after this message is sent. Command accepted and processed as specified. GPS responds to those commands by connecting to the FTP server and transferring files to and from the FTP. The XL-GPS gives the FTP server ‘Anonymous’ as its user name, and uses a null password (e.g., the equivalent of pressing the Enter key on your keyboard instead of entering text).

The FTP server must be configured as follows:. FTP server’s IP address. Copy the Configuration Files to the FTP Server Telnet to the XL-GPS or open a terminal session to it over the serial port.

Using the command line, enter the commands below. Replace with that of the workstation/FTP Server. The configuration files are automatically transferred to/from the FTP server in binary format.

They retain the DOS or UNIX file conventions of the editor. XL-GPS works with either format. Move the Configuration Files Back to the XL-GPS Reboot Warning: The following steps cause the XL-GPS to reboot. If you get “Error: Can’t open source file”, verify that the FTP server’s is running.

After XL-GPS receives the configuration files, it reboots, and goes through the normal startup process. End of Procedure 997-01530-01, Rev. C-25, Jan 2008. B: Upgrading System Firmware Caution: Consideration must be given to the firmware and the hardware version numbers of the XL-GPS and it’s optional components.

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Consult with Symmetricom’s Customer Service department before performing upgrades. This section explains how to completely upgrade the system firmware. This is done using the F100 BH, F100 BUB, F100 BU, and F100 BF commands. XL-GPS inoperable. Telnet to the XL-GPS over the network.

For example, at your workstations command line, type “telnet 192.168.46.10”. When prompted, log in to the unit using the operator’s username and password; the user name and password are usually “operator”. Then ‘burn’ the bootloader to the XL-GPS’s flash memory by entering: F100 bub XL-GPS responds: BURNING FILE 192-8000.bt WITH SIZE 452164 TO PARTITION:0 SECTOR:0 SEC: 0 RE: 0 SEC: 1 RE: 0 SEC: 2 RE: 0 SEC: 3 RE: 0. Then do the same for the ‘file system’ (.fs) file: F100 bh / For example: F100 bh 192.168.49.120 /192-8002.fs XL-GPS responds: BURN HOST IS READY Then enter: F100 bf XL-GPS responds: BURNING FILE 192-8002.fs WITH SIZE 524288 SEC: 94.

‘Can’t open file’ errors - see the preceding message. Message: Unit hangs on “Burning Boot” message. Check that your IP Address, Subnet Mask, and Default Gateway of the XL-GPS are correctly configured. How does one check the unit’s firmware version number? Log on to the XL-GPS and enter the following command:. Is the null modem cable necessary?

What if I’m upgrading a XL-GPS remotely? The null-modem cable is optional. If you decide to Telnet to the XL-GPS over TCP/IP network, you don’t need the null modem cable.

I’m using a null modem cable to connect to the XL-GPS from the XL-GPS keeps rebooting? An ungrounded voltage level on one of the pins in the null modem cable causes the unit to reset. Enterprise MIB variables.

SNMP Private Enterprise MIB Structure This section describes the top level structure & design of the XL-GPS SNMP Private Enterprise MIB. SNMP Addressing SNMP addressing is structured as a very large tree database. A root node address is an integer value that ranges from 0 to some very large number. For the XL-GPS, groups 1, 2, 3, 4 and 5 have been deprecated and a new group 6, products, has been added.

For the XL-GPS and future Symmetricom products, groups 1 through 5 will be absent from the XL-GPS Enterprise MIB definition supplied with the unit. The top structure for the XL-GPS is. The xlGpsSystem system group contains the systemFault and the systemStatus groups. These groups contain information describing the operation of the XL-GPS system as a whole. The systemFault group contains information concerning system faults that have occurred, as well as configuration parameters for the generation of system alarms, called traps in SNMP, resulting from those faults. Note: For the figures in this chapter, substitute “xlgps” for “xli”. The XL-GPS systemAlarmData group defines SNMP traps and cannot be directly retrieved by the SNMP manager.

When a system alarm event occurs an SNMP trap alarmSystemNotification is sent to the SNMP managers previously configured to receive traps. Note: For the figures in this chapter, substitute “xlgps” for “xli”. The XL-GPS systemStatus group is used to provide a current operational view of the system. The systemStatusGeneralGroup gives on overview of the system status, including the status of the clock and the reference clock source.

MIBS defined using the Structure of Management Information version 2 definitions. The XL-GPS SNMP agent will send SNMP version 1 traps.

This is done to maintain compatibility with SNMPv1 managers. The trap presently defined is: alarmSystemNotification The alarmSystemNotification trap is sent when the state of an object in the systemStatusDetail group changes and the corresponding mask object in the configDataMasks group is enabled. Making additions to the XL-GPS product MIB is also a straightforward task with several caveats. The first is that additions may be made but the object identifier and the semantics of existing objects may not be altered. The message is intended to relay and important even that occurred within the agent that requires attention or notification. Configuring and Testing SNMP This section outlines the procedure to perform verification tests on the SNMP component of the XL-GPS product. Prerequisite: XL-GPS unit, PC with HP OpenView installed, located on the same subnet.

“Edit-Events-Modify”. A popup titled “Modify Events” will appear. In the “Modify Events” popup click the “Event Message” tab. Under “Actions” select the “Log and display in category”. In the “Event Log Message” field, enter “XL-GPS System Trap: $.”. Do not en- ter the quotation marks. “private” and the “Retries” field to 0.

XL-GPS Configuration SNMP Configuration Follow the manual to load the snmp.conf configuration file into the XL-GPS. The IP address of the HP OpenView PC must be in both the public and private communities. Test Procedure Testing “Get”. Perform an action to generate a trap. Select the menu item “Fault-Alarms”. Verify in the “All Alarms” popup that there is an entry of the form: Normal Thu Mar 21: 14:30.09 192.168.11.218 XL-GPS system trap: 1 private.enterprises.symmetricomTtm.products.xlGps.alarmDataIpAddr.0 (IpAddress) 192.168.11.218 2 private.enterprises.symmetricomTtm.products.xlGps.alarmDataTimeStamp.0 (OctetString): HH:MM:Ss UTC 3 private.enterprises.symmetricomTtm.products.xlGps.alarmDataCode.0 (Integer).

NTP Packet Transmitted Timestamp Accuracy ±10 milliseconds. Editing ntp.conf The XL-GPS is a Stratum 1 NTP server.

Therefore, it does not support NTP peering, in which a Note: time server gets time information by sending an NTP query to another time server. Entering valid IP addresses for the ‘server’. “M” specifies MD5 authentication, the only type available. “symmetricom” and “TTXL-GPS” are the arbitrarily chosen keys The first column is the key identification number, which may range in whole positive numbers from 1 to 65,535. The second column is the type of key, which is always set to the letter M when using MD5 authentication. TTXL-GPS When you invoke the NTP client at the command line, use the following options: – to turn on broadcast reception – k /etc/ntp.keys to specify the name and location of the keys file – for debugging.

An example command line might look like: ntpd –d –d –d –b Important lines in the ntp.conf file of the ntp client (not server) are: trusted key. E: Time Code Formats The following section provides a summary description of the three time code types used by the XL-GPS. The definitive IRIG time code specification, the Range Commanders Council’s IRIG Serial Time Code Formats, IRIG Standard 200-98, is available on the Web at. Five flags are encoded in the control function segment of the IRIG-B code. The first flag encoded at element P5+40ms is the LOCK indicator. It is a binary 1 when the XL-GPS is not locked to a reference.

The second flag encoded at element P5+60ms is a binary 1 when the worst case time error exceeds threshold 1 (refer to 'Function 5 - Time Quality Enable/Setup'). Figure 4: IRIG Standard Format A 997-01530-01, Rev. C-25, Jan 2008.

F: World Map of Time Zones: 997-01530-01, Rev. C-25, Jan 2008. G: Part Names Standard Chassis.

Model XL-GPS 1UChassis w. Main CPU Card Software-Key Enabled Options. Network Time Protocol on Standard Network Port. Time Interval - Event Time (TIET) on Main CPU Card’s J1 connector. Programmable Pulse Output (PPO) on Main CPU Card’s J2 connector. H: Sales and Customer Assistance Symmetricom's Sales and Customer Assistance Centers are a centralized resource to handle all your customer needs. Our Centers are staffed with logistics personnel to handle product quotes, order status and scheduling as well as technical personnel for technical support, installations or service quotes.

997-01530-01, Rev. C-25, Jan 2008. Index Numerics 10/100 BASE- T 12/24 Hour Format 87-8028-2 Accuracy Alarm Alarm Control / Status Alarm Status Alarm Status LED 25, 64 Antenna Cable Delay Aux Ref J3 Input BASE- T BootLoader Bootloader Mode BUFP Burn Burn BootLoader Burn File System Burn FPGA Firmware Burn Host Cable Delay. Invalid Command Error Time Error Messages Ethernet Address Expansion Module configuring installing Expansion Module (87-8034) F1 – Time Zone 17, 34 F100 – Network Port & XL-GPS Software F100 BASET – 10/100 BASE- T 87, 114 997-01530-01, Rev.

C-25, May 2008. F100 BF – Burn File System F100 BH – Burn Host F100 BU – Burn F100 BUB – Burn BootLoader F100 BUFP – Burn FPGA Firmware F100 CONFIG – Configure NTP & SNMP F100 CONFIG – Configure NTP & SNMP Parameters F100 EA –. Factory Mode Jumper Fault Status Firmware Firmware Upgrade Format Time Output Freq Meas 6, 100 Frequency Measurement 6, 100 Function Reference Function Summary Future Expansion Gateway Goodbye. Antenna Cable Delay M12 Receiver Operation Mode Receiver Configuration Satellite List Signal Strength Requirements GPS Receiver LLA/XYZ Position Guest Login User Name. XL-GPS-Generated MIB Structure Mounting the GPS Antenna Network Configuring Network Port Connecting to Connecting to. Network Port & XL-GPS Software Network Port Settings NOTICE Cannot respond to command because Utility Port session has priority.

9, 135 Configure Configure Parameters ntp.conf. Options Key Entry order status order status and scheduling Oscillator Statistics Oscillator Configuration Part Names Password Change Changing PING Position Power Supply Private Enterprise MIB Structure product quotes Programmable Pulse Output quotes Rack Mounting Rate Output Reboot Remote Lock Status Remote Lockout Restarting the Unit Please wait. Configuring and Testing Glossary of Related Terms SNMP Addressing SNMP Private Enterprise MIB Structure Software System Firmware (upgrading) Software Version Source file bytes read Specifications AC Power Supply Chassis Code Out Environmental GPS Reference GPS Time and Frequency Referenc J1 - Optional TI/ET 5, 6 J2 - Optional Programmable Pulse Out (PPO) J2 - Rate Out. User Interfaces User Name Change Username Changing Using F100 Config Version Software Volatility Statement XL-GPS Configuration MainCard Group Overview Product Description and Features Rack Mounting Software System Group System Status Group Traps XL-GPS-Generated Messages XYZ coordinates 997-01530-01, Rev.

C-25, May 2008.