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XL-GPS Time & Frequency System
User Guide
997-01530-01, Rev. C, January 2008
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Notices Symmetricom, Inc. Timing Test & Measurement 3750 Westwind Blvd. Santa Rosa, CA 95403-1053 http://www.symmetricom.com Copyright © 2006 Symmetricom, Inc. 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.
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SSSS S SS SS S SS SSSS S S S SSSS S S S SSS S S S SSSSS SS S Table of Contents Preface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . vii Limited Warranty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . vii Limitation of Liability . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . vii Proprietary Notice . . . . . . . . . . . . . . . . . . . . .
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SSSS S SS SS S SS SSSS S S S SSSS S S S SSS S S S SSSSS SS S 3: Installation/Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13 Installing the GPS Antenna . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13 Selecting a GPS Antenna Site Outdoors . . . . . . . . . . . . . . . . . . . . . . . . . . .13 Mounting the GPS Antenna . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13 1 GPS Signal Strength
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SSSS S SS SS S SS SSSS S S S SSSS S S S SSS S S S SSSSS SS S F51 – GPS Antenna Cable Delay . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52 F52 – Distribution Cable Delay . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53 F53 – GPS Operation Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55 F60 – GPS Receiver Satellite List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56 F66 – Da
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SSSS S SS SS S SS SSSS S S S SSSS S S S SSS S S S SSSSS SS S A: Using F100 Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .114 Configuring NTP & SNMP Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .114 Overview of Steps . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .114 Set up the FTP Server . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .114 1 Get the IP Address
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SSSS S SS SS S SS SSSS S S S SSSS S S S SSS S S S SSSSS SS S F: World Map of Time Zones: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 141 G: Part Names . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 142 H: Sales and Customer Assistance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 143 US Assistance Center . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 143 Customer Ser
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SSSS S SS SS S SS SSSS S S S SSSS S S S SSS S S S SSSSS SS S 1 vi 997-01530-01, Rev. C-25, Jan 2008
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SSSS S SS SS S SS SSSS S S S SSSS S S S SSS S S S SSSSS SS S Preface Limited Warranty Each new product manufactured by Symmetricom is warranted for defects in material or workmanship for a period of one year from date of shipment (“Limited Warranty”). Defects in material or workmanship found within that period will be replaced or repaired, at Symmetricom’s option, without charge for 2 material or labor, provided the customer returns the equipment, freight prepaid, to the Symmetricom factory
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SSSS S SS SS S SS SSSS S S S SSSS S S S SSS S S S SSSSS SS S Proprietary Notice This document, whether patentable or non-patentable subject matter, embodies proprietary and confidential information and is the exclusive property of Symmetricom, Inc. It may not be reproduced, 1 used or disclosed to others for any purpose except that for which it is purchased or loaned. Abut this Manual This manual is subject to change without notice. Symmetricom can not be held responsible for any errors or in
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SSSS S SS SS S SS SSSS S S S SSSS S S S SSS S S S SSSSS SS S 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 2 time and frequency outputs from its GPS-disciplined system clock. When locked to Symmetricom’s -12 timing-optimized GPS receiver, the XL-GPS provides 1x10 frequency output accuracy, and better than 30 nS RMS accuracy to UTC. Two user interfaces ar
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SSSS S SS SS S SS SSSS S S S SSSS S S S SSS S S S SSSSS SS S • 1 MPPS • 5 MPPS • 10 MPPS 1 • 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) • Programmable Pulse Output (PPO) • Time Interval, Event Time (TI/ET) • Frequency Measurement (FREQ MEAS) The optional OCXO oscillator upgrade provides enhanced short-term stability while locked to GPS,
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SSSS S SS SS S SS SSSS S S S SSSS S S S SSS S S S SSSSS SS S 2: System Specifications Chassis The chassis is a 19-inch rack-mounted 1U chassis. Size: 1.75 in. x 17.1 in. x 14. in. 2 Weight: 8 lbs Standard Hardware: Standard 19" EIA rack system Optional Hardware: Slide rack hardware 1 Environmental Operating Temperature: 0° to +50 °C (+32° to +122 °F) Storage Temperature: 55° to +85 °C (67° to +185 °F) Humidity: 95%, non-condensing Vibration - Operating: GR-CORE-63, 4.5.2/4, locked to 1.0 g Vib
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SSSS S SS SS S SS SSSS S S S SSSS S S S SSS S S S SSSSS SS S AC Power Supply Input 1 Input connector IEC 320 type Input voltage range Universal, 90 - 260 VAC / 110-300 VDC Input frequency range 47 Hz - 63 Hz 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. Interface: RS-232, RS-422
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SSSS S SS SS S SS SSSS S S S SSSS S S S SSS S S S SSSSS SS S Network Port 10/100 The Ethernet port interface is: Type: Standard RJ-45 8 pin connector, 10 Base-T and 100 Base-T standards. Frame format: IEEE 802.3 J1 - Optional TI/ET 2 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. The input impedance is selectable
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SSSS S SS SS S SS SSSS S S S SSSS S S S SSS S S S SSSSS SS S J2 - Optional Programmable Pulse Out (PPO) The PPO allows generation of a precisely synchronized trigger pulse at an arbitrary time and with arbitrary pulse width in integer multiples of 1 μS. The rising edge of the trigger output can be programmed to occur with 1 us resolution. 1 Pulse width: Programmable in 1 μS steps On time edge: Rising Amplitude: TTL Levels into 50 Ω J3 – Optional Frequency Measurement The Frequency Measuremen
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SSSS S SS SS S SS SSSS S S S SSSS S S S SSS S S S SSSSS SS S Code Out The default output is IRIG-B-120 AM. Configuration is via the Keypad, Serial I/O, and Network port. Format: IRIG B-120 1 kHz AM -000 DC Amplitude (AM): 3 Vp-p, into 50 Ω +/-10% Ratio (AM): 3:1 +/-10% Amplitude (DC): TTL into 50 Ω Qty: 1 2 Connector: BNC female Phasing: In phase with carrier ± 10 μS Accuracy: Refer to “Time and Frequency Accuracy” on page 3 Five flags are encoded in the control function segment of the IRIG B c
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SSSS S SS SS S SS SSSS S S S SSSS S S S SSS S S S SSSSS SS S GPS Time and Frequency Reference GPS Time and Frequency reference configuration is via the Keypad, Serial I/O, and Network port. 1 Frequency: 1575.42 MHz (L1 signal). Code: Coarse Acquisition (C/A) code. Tracking: Up to 12 satellites. Position Accuracy within 10 meters when tracking four (4) satellites. 1 PPS Accuracy: UTC(USNO) 30 nanoseconds RMS Time standard: UTC Antenna input: BNC female Antenna power: +12 VDC Options Expansion Mo
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SSSS S SS SS S SS SSSS S S S SSSS S S S SSS S S S SSSSS SS S IRIG Code Out Format: IRIG B-120 1 kHz AM, or IRIG B-000 DC Amplitude (AM): 3.0 Vp-p +/-1V, into 50 Ω Ratio (AM): 3:1 +/- 10% Amplitude (DC): TTL into 50 Ω Phasing: In phase with carrier ± 10 μS 2 Alarm Off (High Z) Power off Off (High Z) Error, major or minor enabled alarm fault. On (Low Z) Normal, no major or minor enabled alarm faults. Drive: Open Collector 1 Max. Voltage: 25 VDC Max. Current: 50 mA Rates Rate: 1 PPS, 1 kPPS, 10 kPP
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SSSS S SS SS S SS SSSS S S S SSSS S S S SSS S S S SSSSS SS S 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): 1 NTP ver. 3.0 UDP Port 123 - RFC1305 (Transmitted Timestamp Accuracy ±10 µS) SNTP UDP Port 123 - RFC1361 TIME UDP Port
