Xli gps manual

Audio, Voice, and Line Circuits Software. Audio, Voice, and Line Circuits Documents. MyMicrosemi Partner Portal. PoE Support Cases. PoE Collateral. Storage ICs Documents and Software. Timing ICs Documents. Overview One of the great design benefits of the XLi is that, because of its variety of option cards, a company can customize it to fit to their specific application needs.

Plug and Play Configuration Configuration recognition software automatically detects the unit's setup, without modifications to the operating system, providing "plug-and-play" configuration capability for current and future application needs.

Keypad Operation. Keypad Examples. Command Line Interface. Logging In. Operator Login. Guest Login. Logging Out. Session Timeout and Priority. Web Interface. User Privileges. User Names and Passwords. Submitting Changes. Function Summary. F11 - Time Output Format. Error Messages. Overview of Procedure.

Set up the FTP Server. Upgrade the Firmware. NASA F: World Map of Time Zones: H: Sales and Customer Assistance Both configurations include the following items. Other GPS antenna cable lengths can be specified at the time of purchase. For contact information, please see Sales and Customer Assistance page It tracks up to 12 L1 GPS satellites, decodes their signals for time and position, and feeds this data to the XLi through the internal backplane.

The quarantined signal is excluded from the timing solution for 12 hours before it is requalified for inclusion in the timing solution.

The stability of the following oscillators is dependent on the reference source. Warning : Prior to servicing the interior of a unit with dual power supplies, remove both power cords. Figures 1 and 2 on the following pages provide a simplified view of the standard XLi's clock architecture.

Aux Ref. Code Input. The tables below describe system clock accuracy while locked to the reference source indicated. Currently, GPS is the only supported reference source. If an Aux Ref input is available and enabled, the XLi assumes that Aux Ref is a better frequency source than its own oscillator. If a timing reference is not available or becomes unavailable and Aux Ref is enabled, the XLi locks to the Aux Ref input.

The following specifications describe the standard as opposed to optional inputs and outputs on the standard configuration of the XLi. The rising edge of the pulse is measured against XLi time with 5 ns resolution. Note: Configuring J1 as the input for a time code reference source is not supported. If a time reference is unavailable, 1 PPS is as stable as the frequency reference e.

Blocked signals and multipath cancellation significantly increase GPS acquisition time. Multipath cancellation is caused by reflected signals that reach the antenna out of phase with the direct signal.

Multipath cancellation and blocked signals are typically caused by vertical reflective objects positioned to the side and above the antenna. To solve these problems, mast mount the antenna at least 1 meter away from and above the reflecting surface. When calculating the total antenna cable length, include cable that is needed to meet safety and regulatory requirements, such as lightning arrestors and building code requirements for running coaxial cable from the exterior to the interior of a building.

If possible, test the GPS signal reception of a particular site before mounting the antenna and running the cable indoors. Some sites may turn out to be unsuitable due to interference. Antennas not rated for 12 V will be damaged. Mount the GPS antenna on an antenna mast recommended or on the peak of a building.

For the mast, use 2-inch 5. Use guy wires to stabilize masts longer than 10 ft. Avoid mounting the antenna on a tower, which requires a specialist to maintain. A foot length of RG coax cable of has a loss of dB, which meets this requirement. Abide by the minimum input gain requirements if using other cable types. Additionally, if changing the antenna, abide by the 41 dB gain requirement.

Other factors, such as radiation, coverage,. VSWR, and input impedance also affect system performance. Symmetricom recommends using the standard volt capable antenna and cable provided with the GPS receiver.

Connect the network port to the timing network. Connect the AC Power Supply it to a power source. The IEEE card requires an additional 2 minutes to complete its startup sequence before it is available from the user interfaces. Do this if you plan on using the command line or web interface to manage the XLi over the network.

Change the factory set user names and passwords. For the standard 50 foot After approximately 20 minutes of operation, check that. If this delay is unexpected, consider relocating the GPS antenna to a better site or troubleshooting the GPS antenna cable. If an asterisk appears, it means that the GPS receiver is currently unlocked from the GPS satellites, this may indicate a problem with GPS satellite visibility or signal strength.

Using the familiar keypad display interface, modify the following F settings:. The factory setting, 2 seconds, is the recommended value. Generates additional network traffic. The new web page takes approximately 5 seconds to load. Set Clock Configuration to Slave Primary. Try operating with Slave Synchronization Threshold at 5 microseconds.

Timing networks with bursty or heavy traffic, routers, or many layers of hubs and switches may need the higher microsecond setting. Click the Submit Changes button. Install the XLi chassis so that the top and bottom holes are unobstructed and have sufficient clearance to allow 6 cfm of air to pass through the chassis. To maintain recommended operating temperatures, install a rackcooling fan capable of cfm in heavily loaded racks.

The LED has four states:. No F73 Alarms. The current reference. An indicator in F73 has triggered an alarm. If enabled, the LED blinks when it is green and yellow, but stays unblinking when it is red. Press the TIME button on the keypad to display the time only. Time related functions:.

The Status Display comes up automatically when the XLi is rebooted. The keypad appears as follows:. See Clock. Note: When using. Enters currently displayed choice, e. Displays the current time. Can also be used to exit a function without saving changes. Displays the clock status and time.

Can be used to exit a function without saving. Displays first item in function menu. To open a command line session, connect to the serial or network port using a terminal or a terminal emulation program on a PC. As shipped, you can log in as Operator using:. The factory settings are indicated in Figure and in the subsequent configuration tables.

Lettering inverted for this illustration. Page Maintenance The other broadcast byte provides direct indication of major and minor alarm status of the XLi. The logic in the FPGA combines the line fault signals and the broadcast byte inputs to form a summary major alarm indication. The FPGA uses the broadcast byte minor alarm information verbatim to control minor alarm indication.

Page Installation J3 Aux Ref input. It tracks up to 12 L1 GPS satellites, decodes their signals for time and position, and feeds this data to the XLi through the internal backplane. When installed in a Symmetricom XLi, this option samples one phase of the 50 Hz or 60 Hz frequency supplied from the user's power line and provides frequency and time information.

The following installation instructions apply only to an FTM card installed by the customer later on. Page Operation After the XLi has locked to its timing reference source and is in specification, enter a value of zero 0 for Time Deviation Preset to remove the time deviation accumulated during synchronization to the XLi's timing reference source.

Page Configuration The following is a list of features that can be configured by the user. This is indicated by each of the four time quality lines changing to the high state in turn as the worst-case error exceeds the threshold for that line. Page Parallel Bcd Msec Output With Unlock Status This Parallel BCD module provides provides 42 lines of parallel BCD time data representing 's of days to units of milliseconds, two data valid strobes, and an unlock line Unlock which indicates when the XLi is unlocked from the selected reference source.

Page Have Quick Input Specifications The modified Hamming code employs 4 parity bits and 4 data bits for each 8 bit character. Page 10mS or fault the Have Quick time and frequency reference reads the code unlocks.

While the Xli is locked all bits are high indicating no information , no fault is reported. When the time error in the Xli exceeds 10mSec the bits are set to an integer value of 9 indicating time error of 10mS or fault.

It can also be used in conjunction with an AC power supply for redundancy. In that scenario, the XLi uses the power supply with the highest voltage as the primary source of power, and switches to the alternate power supply as needed. Page Other Features The results of the command are displayed in the Response field.

Consult Chapter 5: Function Reference page 45 for the specific syntax of each command. This displays the following window: Please consult the Symmetricom TimeMonitor documentation or online help for additional information. Page This page intentionally left blank. Recovery Action: Restart the Unit. If this error message persists, contact Symmetricom Technical Customer Service.

Page Recovery Action: Verify correct parameter values. If correct, restart the XLi. Page Informational Messages 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 XLi. The restart happens immediately after this message is sent. Command accepted and processed as specified.

Page This page was intentionally left blank. Using the command line, enter the commands below. XLi works with either format. Ideally they should be on an isolated subnet. Page Faq F IP The null-modem cable is optional. An ungrounded voltage level on one of the pins in the null modem cable causes the unit to reset. Page This flag equals 1 when GPS is used as the time synchronization source and 0 for all other sources. Page meters different from actual sea level. Page baud yields the best time accuracy.

Page "Number of times the time server called the ACTS dial-up service and something was not right. Page "The syntax of the reply from remote modem was incorrect, possibly due to line noise. Page Xlimaincard-Smiv2. Page Xli-Smiv2. The format matches the output of the F73 command. Page 3 - indicates the clock has not locked since power on. Page Editing Snmp. Page History The level under the xli group is divided into four groups; the first two of which will be explained later.

The optionCardGroup has all the available option cards under it. Under each option card is a table for that option card type because there may be multiple cards of that type within an XLi chassis. These groups contain information describing the operation of the XLI system as a whole. The xliFault 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.

This is done to maintain compatibility with SNMPv1 managers. The first is that additions may be made but the object identifier and the semantics of existing objects may not be altered.

Page Configuring And Testing Snmp The message is intended to relay and important even that occurred within the agent that requires attention or notification. The second segment encodes control functions. This segment is generally available for data of the user's choice. It is a binary 1 when the XLi is not locked to a reference. Page Nasa 36 A reference marker locates the beginning of each frame.

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