Tested/Guaranteed - FullyWorking • Upgraded Furuno GPS Receiver • OCXO OscillatorOption • 4x 10MHz Low Phase Noise Outputs • 4xConfigurable Timecode Outputs • NTP Server •PPO • TI/ET •Frequency Measurement • GPSDO 10 MHz Oscillator • 1PPS

Note: This unit has been upgradedwith a brand new GPS receiver module fromFuruno. It is therefore unaffected by theSeptember 18th 2022 week number rolloverevent that caused most XLi receivers to failto sync to GPS and to show an incorrectdate. cosmeticcondition and that has almost every option installed.The display on this unit is bright andclear. The unit has beentested and confirmed to operate as it should, including fullGPS lock and correct time/date display. This unit does havethe internal GPS receiver card (87-8028-2) installed whichsupplies 12 volts to the antenna, so the use of a matchedSymmetricom AT575 12V antenna is recommended (not includedbut listedseparately). Theinternal 10MHz oscillator is the upgraded OCXO typefor greater free-running stability. The unit alsohas a 87-8034-1 Quad Configurable Timecode Output moduleinstalled. The firmwarehas been upgraded to the latest version posted on theSymmetricom website (v2.4), and this supports reporting andconfiguration via a web interface. The unit does In addition there are fouradditional 10 Mhz Low Phase Noise outputs. Rack earsare provided as shown. In mytesting I was able to achieve lock to GPS time andscreenshots of the results of my testing are providedbelow. The photos show the actual item for sale. A fewsmall nicks and scratches have been retouched with matchingpaint so the item will look smart when installed in yourrack.

Full details may be obtained from theUser Manual at

Included Option

Key Features

• Better Than 1x10-12 Frequency Accuracy
• Supports Primary and Secondary Reference Inputs (GPS, TimeCode, 1PPS)
• Configurable as Dual Redundant GPS Receiver in One Chassis(second GPS option not included)
• Standard 10/100 Base-T Network Port
• Intuitive Web Based Management
• HTML, Telnet, SNMP with MIB Standard
• Vacuum Fluorescent Display and Keypad
• Completely Modular with Plug-and Play Capability
• Numerous Field-Upgradeable, Plug-in Option Cards Available
• Time code reader/generator (IRIG A,B; NASA 36) AM and DC
• Auxiliary Reference Input Supports Lock to External Cesiumto Enhance Holdover
• Standard Outputs: 1PPS, Selectable Pulse Rates and Alarm
• Flash Memory for Remote Software Upgrades of the great design benefits of the XLi is that, becauseof its variety of option cards, a company can customize it tofit to their specific application needs. Whether yourapplication demands redundancy in power supplies, GPS, or anyother function, all it takes is the proper configuration ofcards.

  XLi Option Cards The wide range of XLioption cards make it easy to tailor your system to supportnearly every possible output/input needed for time andfrequency applications, by combining option modules,oscillator upgrades, and two GPS receivers per unit.Plug-and-play cards and built-in XLi option card recognitionsoftware lets you swap out modules without modifying youroperating system.

  Plug and Play Configuration Configurationrecognition software automatically detects the unit’s setup,without modifications to the operating system, providing“plug-and-play” configuration capability for current andfuture application needs.

  Freedom to Configure Modularity delivers thefreedom to configure the XLi as a GPS timing receiver [GPSoption not included], or a time code unit (TCU).

  Seamless Integration The XLi seamlesslyintegrates into a network centric environment. The 10/100Base-T interface is standard. Remote management is facilitatedwith the intuitive HTML web based interface as well as SNMPwith an enterprise MIB. Command line interface is alsosupported via Telnet or the RS-232/422 serial port. The XLican function as a Stratum 1 NTP server with addition of theNTS option.

  Wide Range The standard XLi provides a widerange of time and frequency inputs and outputs such as: 1PPSoutput; time code input/output (IRIG A, B; NASA36) in bothmodulated (AM) and demodulated (DCLS) formats; programmablepulse rates; open collector alarm; front panel keypad anddisplay; and more.

  Modular Architecture for Easy Extensions Themodular XLi architecture allows easy extension of the softwareand hardware in the field. Software updates are remotelyadministered. Existing and future hardware option modules canbe added as needed by the user. The GPS timing interface isalso modular which facilitates future upgrade to alternateGlobal Navigation Satellite Systems (GNSS), such as Galileo,when