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Symmetricom XL-GPS User Manual

Symmetricom XL-GPS
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XL-GPS Time & Frequency Receiver
User Guide
CD Part Number 098-00116-000 Rev. A
5 May 2010

Table of Contents

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Symmetricom XL-GPS Specifications

General IconGeneral
Channels12
GPS SignalL1 C/A code
Frequency1575.42 MHz
Power Supply5V DC
Update Rate1 Hz
Frequency Accuracy±1 x 10^-12 (GPS locked)
ProtocolsNMEA 0183
Output SignalsPPS
Holdover Stability±1 μs over 24 hours

Summary

1: Overview of the XL-GPS Time and Frequency Receiver

Product Description and Features

Describes the XL-GPS as a high-precision instrument generating time and frequency outputs from a GPS-disciplined clock.

2: System Specifications

Time and Frequency Accuracy

Specifies the time and frequency accuracy and stability when locked to a GPS timing reference.

3: Installation/Configuration

Installing the GPS Antenna

Provides instructions for installing the GPS antenna, including site selection and mounting.

GPS Signal Strength Requirements

Specifies the required gain at the receiver's antenna connector and cable loss for optimal GPS signal reception.

Configuring the Network Port

Details the steps required to make the XL-GPS operational on a network, including IP address and subnet mask configuration.

4: User Interfaces

Keypad Interface

Explains how to use the front panel keypad for controlling XL-GPS functions, including navigating menus.

Command Line Interface

Introduces the command line interface accessed via serial or network ports, offering additional functions and remote access.

5: Function Reference

F100 – Network Port Configuration & XL-GPS Firmware

Covers network port settings, firmware management, NTP/SNMP configuration, and user management.

6: Option Cards

B: Upgrading System Firmware

7: XL-GPS Generated Messages

A: Using F100 Configuration

Configuring NTP & SNMP Parameters

Guides on transferring NTP and SNMP configuration files to an FTP server for editing and re-uploading.

D: Network Time Protocol (NTP)

E: Time Code Formats

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