Symmetricom XLi User Manual

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XLi Time & Frequency System

Issue 8- June 2008

Manual Part Number: XLi-User Manual

CD Part Number: Xli-Man-CD

XLi Time & Frequency System

XLi-man, Issue 8, 6/17/08, Rev. H

Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com

User Guide

Notices

Symmetricom, Inc. Timing Test & Measurement 3750 Westwind Blvd. Santa Rosa, CA 95403-1053 http://www.symmetricom.com

Copyright © 2008, 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 XLi hardware or software.

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Table of Contents

1: Equipment Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

XLi Time and Frequency System Description and Features . . . . . . . . . . . . . . . . . . . 1

Features and Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

Clock Architecture . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

2: System Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

Mechanical/Environmental . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

AC Power Supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

System Time & Frequency Accuracy . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

GPS Receiver . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Time Code Input . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Have Quick Input . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

1 PPS Input . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Aux Ref Input . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Chassis . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Standard Inputs and Outputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Serial I/O Port . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

NET – Network Port . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

J1 Input – Time Code or Time Interval - Event Time . . . . . . . . . . . . . . . . . . . . . 9

J2 Output – Rate Out or Programmable Pulse Output . . . . . . . . . . . . . . . . . . . 10

J3 Input – Auxiliary Reference or Frequency Measurement . . . . . . . . . . . . . . 10

1 PPS – Pulse Per Second Output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

CODE – Time Code Output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

ALARM Output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

Time Code Output IRIG-B120 w/ IEEE1344 . . . . . . . . . . . . . . . . . . . . . . . . . . 12

OUTPUT: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

Time Code Output IRIG-B000 w/ IEEE1344 . . . . . . . . . . . . . . . . . . . . . . . . . . 13

OUTPUT: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

Time Code Input IRIG-B120 w/ IEEE1344 . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

INPUT: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

Time Code Input IRIG-B000 w/ IEEE1344 . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

Manual Leap Second Entry . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

HaveQuick TFOM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

Certifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

3: Installation/Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

Installing the GPS Antenna . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

Selecting a GPS Antenna Site Outdoors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

Mounting the GPS Antenna . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

Connecting the Antenna to the Receiver . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

GPS Signal Strength Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

GPS-related Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

Lightning Arrestor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

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Antenna Splitter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .22

In-Line Antenna Amplifier . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .22

Making Additional Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .23

Connecting the Power Supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .23

Configuring Network Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .24

Configuring the Time Display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .24

Using the Command Line Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .26

Connecting to the Serial Port . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .26

Connecting to the Network Port (TELNET) . . . . . . . . . . . . . . . . . . . . . . . . . . .27

Using the Web Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .27

Installing or Removing Option Cards . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .28

Additional Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .28

Standard XLi . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .29

XLi with a GPS Reference . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .30

XLi with GPS and Time Code References . . . . . . . . . . . . . . . . . . . . . . . . . . . . .30

XLi with two optional GPS receivers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .30

Installing the Expansion Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .31

Verifying Antenna Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .31

Rack Mounting the XLi . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .31

4: User Interfaces . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .33

Card Positions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .33

Alarm Status LED . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .33

Keypad/Display Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .34

Time Display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .34

Status Display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .35

Menu Display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .35

Keypad Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .36

Keypad Examples . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .37

Command Line Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .38

Logging In . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .38

Operator Login . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .38

Guest Login . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .38

Logging Out . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .39

Changing Username and Password . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .39

Session Time-out and Priority . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .39

Web Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .40

User Privileges . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .40

Sessions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .41

User Names and Passwords . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .41

Logging In . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .41

Navigating . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .41

Submitting Changes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .42

Logging Out . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .42

Notes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .42

5: Function Reference . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .45

Function Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .45

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F1 – Time Zone Offset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48

F2 – 12/24 Hour Format . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49

F3 – Time & Date . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50

F4 – Serial Port Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52

F5 – Time-Quality Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53

F6 – Keypad Lock . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55

F8 - Continuous Time Once-per-Second . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56

F9 - Time On Request . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58

F11 - Time Output Format . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59

F13 – Time Error . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61

F18 – Software Version Request . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62

F27 – FTM III Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63

F42 – Multicode Output Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69

F44 – N.8 Frequency Synthesizer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73

F50 – GPS Receiver LLA/XYZ Position . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75

F51 – GPS Antenna Cable Delay . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77

F52 – Distribution Cable Delay . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 78

F53 – GPS Operation Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 80

F60 – GPS Receiver Satellite List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 81

F66 – Daylight Saving Time (DST) Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 84

F67 – Manual Leap Second Entry . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 86

Adding a Leap Second: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 87

Subtracting a leap second: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 87

Setting the manual leap second function to no event: . . . . . . . . . . . . . . . . 88

F69 – Time Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 89

F71 – Oscillator Statistics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 91

F72 – Fault Status . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 92

F73 – Alarm Control / Status . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 94

Alarms - General Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 95

Clock Status . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 96

PLL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 97

LPN PLL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 97

GPS Primary Receiver and GPS Secondary Receiver . . . . . . . . . . . . . . . . 97

IRIG . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 98

Aux Ref . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 98

Primary Power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 99

Secondary Power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 99

Rubidium Oscillator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 99

DAC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100

First Time Lock . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100

Time Error and Time Threshold . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100

Alarm LED Blink . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 101

Timeout and Timeout Delay . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 101

Power-On Alarm Suppress . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 101

NTP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 101

Clear Alarm Latch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 102

F74 – Clock Source Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 107

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F77 - PTTI Output Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .109

F78 - Parallel BCD Output Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .112

F90 – Code Output Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .116

F100 – Network Port Configuration & XLi Firmware . . . . . . . . . . . . . . . . . . . . . .117

F100 EA – Ethernet Address . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .120

F100 IP – IP Address . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .120

F100 SM – Subnet Mask . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .121

F100 G – Gateway . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .122

F100 IC – Network Port Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .123

F100 BASET – 10/100 BASE- T . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .123

F100 L/LOCK/UNLOCK – Remote Lockout . . . . . . . . . . . . . . . . . . . . . . . . .124

F100 L – Remote Lockout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .125

F100 ST – Self Test Status . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .126

F100 BH – Burn Host . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .127

F100 BUB – Burn BootLoader . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .127

F100 BU – Burn . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .128

F100 BF – Burn File System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .129

F100 BUFP – Burn FPGA Firmware . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .130

F100 CONFIG – Configure NTP & SNMP . . . . . . . . . . . . . . . . . . . . . . . . . . .131

F100 J – Factory Mode Jumper . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .132

F100 K I L L – Reboot . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .133

F100 P – Change User Password . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .134

F100 PI – PING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .135

F100 PN – Change User Name . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .135

F108 – Oscillator Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .137

F110 – J1 Input (Time Code, TIET) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .137

F111 – J2 Output (Rate, PPO) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .142

F113 – J3 Input (Aux Ref, Freq Meas) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .146

F116 – Display Brightness Level . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .150

F117 – Factory Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .151

F118 – Option Board Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .152

F119 – GPS Receiver Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .154

F120 - N.1 Frequency Synthesizer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .158

F123 – Have Quick Input/1 PPS Sync Configuration . . . . . . . . . . . . . . . . . . . . . . .161

F126 – Options Key Entry . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .164

F128 – Have Quick Output Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .165

6: Option Cards . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .167

Expansion Module (87-8034-1, 87-8034-2) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .168

IRIG Code Out . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .168

Alarm . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .168

Rates . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .168

Optional Programmable Pulse . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .169

Alarm Relay (87-8034-2) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .169

Configuring the Expansion Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .169

Multicode Output (87-6002-XL1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .171

Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .171

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Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 171

Adjusting Amplitude and Modulation Ratio . . . . . . . . . . . . . . . . . . . . . . . . . . 172

N.1 Frequency Synthesizer (87-8022) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 173

Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 173

N.8 Frequency Synthesizer (86-708-1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 174

Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 174

Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 174

Low Phase Noise 5 MHz Output (87-8009-5) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 176

Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 176

Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 176

Low Phase Noise 10 MHz Output (87-8009-10) . . . . . . . . . . . . . . . . . . . . . . . . . . 177

Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 177

Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 177

1, 5, 10 MHz Sine/MPPS Square Output (86-8008) . . . . . . . . . . . . . . . . . . . . . . . 177

Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 177

Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 178

Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 180

Sine Wave Outputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 180

Square Wave Outputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 180

Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 180

Equipment Required . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 180

No Output Or Outputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 181

Noisy Outputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 181

Incorrect Frequencies . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 181

T1 Telecom Interface Output (87-6000T1-8) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 181

Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 181

Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 182

Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 182

Frame Format Selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 184

T1 AIS Assertion and Output Signal Control on Major Fault . . . . . . . . . . . . . 184

Output Signal Frequency Selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 185

Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 185

Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 185

Theory of Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 185

Alarm Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 185

Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 186

E1 Telecom Interface Output (87-6000E1-6) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 187

Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 187

Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 187

Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 188

Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 190

Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 190

Alarm Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 191

Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 191

GPS C/A Receiver (87-8028-2) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 191

Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 191

Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 192

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Frequency and Time Deviation Monitor (87-8023) . . . . . . . . . . . . . . . . . . . . . . . .192

Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .192

Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .194

Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .195

Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .196

Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .197

Maintenance and Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .198

Parallel BCD mSec Output with Time Quality (87-8090) . . . . . . . . . . . . . . . . . . .199

Parallel BCD uSec with Time Quality (87-8090-1) . . . . . . . . . . . . . . . . . . . . . . . .201

Parallel BCD mSec Output with Unlock Status (87-8090-2) . . . . . . . . . . . . . . . . .205

PTTI BCD Output (87-8045) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .207

PTTI 10V 1PPS and 1PPM Output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .210

Second Serial Talker or T1 / E1 (87-8047) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .212

HaveQuick/1 PPS Time and Frequency Reference(87-8016-3) . . . . . . . . . . . . . . .216

1PPS Input Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .216

Have Quick Input Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .217

Have Quick Signal Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .217

Have Quick Output with selectable TFOM (87-8016-6) . . . . . . . . . . . . . . . . . . . . .219

Have Quick Output Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .219

Have Quick Signal Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .219

HaveQuick with selectable TFOM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .219

Enhanced Low Phase Noise Module (87-8040) . . . . . . . . . . . . . . . . . . . . . . . . . . .221

Legacy Option Cards . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .222

GPS Receiver (86-8013) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .222

Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .222

Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .222

P7: Oscillators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .223

OCXO Oscillator Upgrade . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .223

High Stability OCXO Oscillator Upgrade . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .223

Rubidium Oscillator Upgrade . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .224

High Performance Rubidium Oscillator Upgrade . . . . . . . . . . . . . . . . . . . . . . . . . .224

8: Power Supplies . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .225

Standard 110 VAC Power Supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .225

12 VDC Power Supply Option (87-8012-12) . . . . . . . . . . . . . . . . . . . . . . . . . . . . .225

24 VDC Power Input Option (87-8012-24) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .226

48 VDC Power Input Option (87-8012-48) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .226

9: Software Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .227

Symmetricom TimeMonitor Software . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .227

Logging TIET and Freq Meas Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .227

Other Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .228

10: XLi-Generated Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .231

Error Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .231

Informational Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .233

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A: Using F100 Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 235

Configuring NTP & SNMP Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 235

Overview of Steps . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 235

Set up the FTP Server . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 235

Get the IP Address of the FTP Server/Workstation . . . . . . . . . . . . . . . . . . . . 235

Copy the Configuration Files to the FTP Server . . . . . . . . . . . . . . . . . . . . . . . 236

Edit the Configuration Files . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 236

Move the Configuration Files Back to the XLi . . . . . . . . . . . . . . . . . . . . . . . . 237

B: Upgrading System Firmware . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 239

Overview of Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 239

Set up the FTP Server . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 239

Open a Command Line Session on the XLi . . . . . . . . . . . . . . . . . . . . . . . . . . 240

Upgrade the Firmware . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 240

Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 243

FAQ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 244

C: SNMP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 245

SymmetricomTtm-SMIv2.mib . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 245

xliMainCard-SMIv2.mib . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 255

xli-SMIv2.mib . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 259

xliSystem-SMIv2.mib . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 259

Editing snmp.conf . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 270

SNMP Private Enterprise MIB Structure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 271

SNMP Addressing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 271

New Top Level Structure of Enterprise MIB for XLi . . . . . . . . . . . . . . . . . . . 271

XLi System Group . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 273

The XLi Fault Group . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 274

The XLi System Status Group . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 275

XLi MainCard Group . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 276

XLi Traps . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 276

Future Expansion . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 276

Glossary of SNMP-Related Terms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 277

Configuring and Testing SNMP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 278

Materials Needed . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 278

HP OpenView Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 278

XLi Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 280

Test Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 280

D: Network Time Protocol (NTP) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 283

Leap Indicator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 283

Editing ntp.conf . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 283

Editing MD5 keys on the NTP Server . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 284

Editing MD5 keys on the NTP Client . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 285

E: Time Code Formats . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 287

Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 287

IRIG . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 287

Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 287

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IRIG Code Format . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .287

IRIG-B Time Quality Flags . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .288

XLi IRIG Time Code Input/Output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .288

NASA 36 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .289

Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .289

NASA 36 Code Format . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .289

XLi NASA 36 Time Code Input/Output . . . . . . . . . . . . . . . . . . . . . . . . . .289

F: World Map of Time Zones: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .291

G: Part Numbers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .293

H: Sales and Customer Assistance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .295

Index . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .297

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1: Equipment Overview

XLi Time and Frequency System Description and Features

The XLi provides high-precision time and frequency signals. Its modular design allows customization for a wide range of applications. In its standard configuration, the XLi functions as a Time Code Unit which receives an IRIG time code input, synchronizes its internal oscillator to that input, and produces time code and frequency outputs. When paired with its internal timing-optimized GPS receiver, the XLi

-12

provides 1x10 XLi is available in a 19-inch 1U or 2U chassis with rack mount ears for installation.

This new series of Time and Frequency Clock incorporates a flexible architecture to meet the most demanding clock synchronization requirements. The Model XLi incorporates a dual redundant reference source design that enables high-availability of the clock source. To achieve high-availability, the user configures the XLi with dual independent GPS receivers and antennas, or with one GPS antenna/ receiver and one time code or 1PPS reference. In addition, the 2U chassis, when configured with multiple options, provides dual redundancy and

Optional oscillator upgrades provide enhanced short term stability when locked to a reference source, and improved holdover ‘flywheeling’ when a reference source is unavailable. See “P7: Oscillators” on

page 223 for more information.

frequency output accuracy, and better than 30 nS RMS accuracy to UTC (USNO). The

distribution in a single unit.

Features and Options

Three user interfaces are available for managing the XLi:

• The web interface, available using a browser connected to the network port

• The command line interface, available from the serial port and standard network port (telnet)

• The keypad/display interface, available on the front panel of the XLi

The XLi’s modular design allows customization for a wide range of applications. The following range of features are available in the standard configuration:

• Voltage-controlled temperature-compensated crystal oscillator (VCTCXO)

• 1 PPS Output

• Rate Output 1/10/100 PPS, 1/10/100 kPPS, 1/5/10 MPPS

• Code Output (IRIG-A, B, and NASA 36)

• Alarm Open Collector Output

• Code Input (AM or DC: IRIG-A, B, and NASA 36)

• Auxiliary Reference Frequency Input (1/5/10 MHz)

• Network Port (10/100 Base-T)

• Command Line Interface (Telnet and Port)

• Simple Network Management Protocol (SNMP)

• Web Interface (HTML)

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• RS-232/422 Serial I/O Port

• Vacuum florescent display, 19-button keypad

• 90-264 VAC

In addition, the XLi’s standard features can be expanded with the following optional configurations:

• GPS C/A Receiver References

• Programmable Pulse Output (PPO)

• Network Time Server (NTP)

• Multicode Output Card

• N.1 / N.8 Frequency Synthesizer

• Low Phase Noise 5 MHz Output Card

• Low Phase Noise 10MHz Output Card

• Enhanced Low Phase Noise Module

• T1/E1 Output Card

• Second Serial Talker or T1/E1 Rate Generator

• 1, 5, 10 MHz Sine/MPPS Square Output Card

• Have Quick Input/1 PPS Sync Reference Card

• Have Quick with TFOM Output Card

• PTTI BCD Output

• Parallel BCD mSec Output with Time Quality Card

• Parallel BCD uSec Output with Time Quality Card

• Parallel BCD mSec Output Card

• Oscillator Options: OCXO, Rubidium

• Frequency and Time Deviation Monitor

• Time Interval Event Time Option

• DC Power Supplies for 12, 24, and 48 VDC applications

• Redundant power supplies

• TimeMonitor Software

• Expansion module

See“6: Option Cards” on page 167 for more information. Optional oscillator upgrades provide enhanced short term stability when locked to a reference source, and improved holdover ‘flywheeling’ when a reference source is unavailable. See “P7: Oscillators” on page 223

for more information.

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Clock Architecture

The following figures provide a simplified view of the XLi’s clock architecture.

16.384 MHz Osc. PLL

Aux Ref

Aux Ref - 1/5/10 MHz

Phase Measurement

Clock DPLL

DAC Select

DAC

10 MHz Osc.

200 MHz PLL

1 PPS A 1 PPS B

Code Input

1 PPS Timing Select

Time and Clock

Recovery

Code Input

Phase Compare

Clock Machine

Code Generation

Rate Generation

1 PPS Output

Code Output

Rate Output

Figure 1: Functional Timing Block Diagram

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Display Keypad Oscillator Rb Power

Display/Keypad Interface

I/O

Backplane Interface

Power Supply

AC +5 V, +/- 12 V

110/220 AC

Power Supply

DC +5 V, +/- 12 V

9-18 VDC 18-36 VDC 36-72 VDC

Figure 2: Interface Architecture Block Diagram

10 MHz Power, Vc

Power I/O Power I/O

T&F CPUOption

User I/O User I/O

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2: System Specifications

Mechanical/Environmental

Operating Temperature: 0 °C to +50 °C (+32 °F to +122 °F)

Maximum Rate of Change: 8 °C per hour

Storage Temperature: -55 °C to +85 °C (-67 °F to +185 °F)

Humidity: To 95% non-condensing

Operating Altitude: Maximum 4 km (2.49 mi. or 13147 ft.)

Front Panel Display: Vacuum Fluorescent Display (VFD) 4.38” x 0.88" (11.13cm x 2.24 cm). 160X16

pixels. Displays startup messages, clock status, time and day of year, and interactive clock functions. The TIME button displays Time and Day of Year (TOD) on one full-height line.

Keypad: 0–9, UP, DOWN, LEFT, RIGHT, ENTER, CLR, TIME, STATUS, MENU

Serial I/O: Full user-selectable RS-232/422 communication protocol up to 19200 baud

AC Power Supply

Input:

Input connector: IEC 320 connector

Input voltage range: UL: 100 – 240 VAC

Universal, 90 – 264 VAC and 110 – 370 VDC

Input freq. range: 47 Hz – 440 Hz

Output: +5.2 V (5.0 to 5.4 V), 25 watts, 0 to 5 amps

+12 V (11.4 to 12.6 V), 45 watts, 0 to 3.8 amps

-12 V (-11.4 to -12.6 V) 32 watts, 0 to 2.7 amps

Wattage: 104 watts

Power Supply Status: The Fault Detector monitors all three output voltages and provides a visual

(panel LED) and fault status if any output voltage decreases by 10%.

Alarm Status LED: Green LED on with no fault and AC power applied. Green LED off with fault or no

AC power applied.

Fan: Exhaust 3-6 CFM

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System Time & Frequency Accuracy

The tables below describe system clock accuracy while locked to the reference source indicated.

GPS Receiver

1 PPS Output: UTC(USNO) 30 nS RMS, 100 nS peak

Frequency Output Accuracy:

Frequency/Timing, Allan Deviation, Stability (with TCXO):

<1 x 10

1 x 10 3 x 10 3 x 10 2 x 10 1 x 10

-12

@ 1 day

-9

@ 1 sec

-10

@ 10 sec

-10

@ 100 sec

-10

@ 1000 sec

-12

@ 1 day

AM Code Output Accuracy: 10 μS to the 1 PPS output

DC Level Shift Code Output

200 nS to the 1 PPS output

Accuracy:

Time to System Lock <20 min. typical

See GPS Signal Strength Requirements (page 21), and GPS C/A Receiver (87-8028-2) (page 191).

Time Code Input

1 PPS Output: 10 μS to the incoming code

Frequency Output Accuracy:

Stability of Frequency/Timing – Allan Deviation:

-10

1x10

5x10

, referenced to 5x10

-9

@ 10 sec, referenced to 3x10

-11

carrier @ 1 day

-11

@ 10 sec carrier

Accuracy of AM Code Output: 10 μS to the incoming code

Accuracy of DC Level Shift

10 μS to the incoming code

Code Output:

See “F110 – J1 Input (Time Code, TIET)” on page 137.

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Have Quick Input

1 PPS Output: 10 μS to the incoming code

Stability of Frequency/Timing – Allan Deviation:

Accuracy of AM Code Output: 10 μS to the incoming code

5x10

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@ 10 sec

Accuracy of DC Level Shift Code Output:

See “HaveQuick/1 PPS Time and Frequency Reference(87-8016-3)” on page 216.

10 μS to the incoming code

1 PPS Input

1 PPS Output: 10 μS to the incoming 1 PPS

Stability of Frequency/Timing – Allan Deviation:

Accuracy of AM Code Output: 10 μS to the incoming 1 PPS

Accuracy of DC Level Shift Code Output:

See “HaveQuick/1 PPS Time and Frequency Reference(87-8016-3)” on page 216.

-9

5x10

@ 10 sec

10 μS to the incoming 1 PPS

Aux Ref Input

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. Under those conditions, frequency output accuracy is equal

to the reference < 1 x 10

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Note: Manually set the time and date, when using 1 PPS or Aux Ref as the primary references. Set the

date (year) when using IRIG A000, A130, B000, B120, or NASA 36 as the primary reference. See F3 – Time & Date (page 50)

Chassis

1U Chassis: Standard 19" EIA Rack System, hardware included

Receiver Size: 1.75 in. x 17.1 in. x 15.35 in.

Weight: Standard configuration, without options ~9.25 lb. Fully loaded ~ 10.95 lb

2U Chassis: Standard 19" EIA Rack System, hardware included

Receiver Size: 3.5 in. x 17.1 in. x 15.35 in.

Weight: Standard configuration, without options ~12.55 lb. Fully loaded ~ 21.00 lb

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Standard Inputs and Outputs

The following specifications describe the standard (as opposed to optional) inputs and outputs on the standard configuration of the XLi.

Serial I/O Port

The standard serial data port is a bi-directional EIA standard RS-232C interface. The serial data port is configured via the Keypad / Display and Standard network port.

Interface: RS-232 or RS-422

Data Rates: 1200, 2400, 4800, 9600 and 19200 bps

Data Bits: 7 or 8

Parity: even, odd, or none

Stop Bits: 1 or 2

Connector: Male 9-pin D subminiature

Pin Assignment: 1------N/C

2------Rx (RS-232) 3------Tx (RS-232) 4------N/C 5------GND 6------Rx- (RS-422) 7------Rx+ (RS-422) 8------Tx- (RS-422) 9------Tx+ (RS-422)

Factory settings: 9600, 8, N, 1

Note: Parity - NONE is only available/valid when Data Bits is set to 8.

See “F4 – Serial Port Configuration” on page 52.

NET – Network Port

The Ethernet port interface has a standard RJ-45 connector that provides IEEE 802.3 frame 10/100 Base-T Ethernet. The XLi can optionally be factory configured as a Network Time Protocol (NTP) server, which can be used to synchronize client computer clocks over a network. This function is only available with GPS and IRIG B input. See “F100 – Network Port Configuration & XLi Firmware” on page 117.

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J1 Input – Time Code or Time Interval - Event Time

Time Code Input Specifications - Modulated (AM) and Demodulated (DC):

Format: IRIG-B120, B000, B120 1344, B000 1344

IRIG-A130, A000 NASA 36

Amplitude (AM): 0.5 Vp-p to 10 Vp-p, 100 kΩ to ground

Ratio (AM): 3:1 ±10%

Amplitude (DC):

Logic Low: Logic Hi:

Impedance: 100 kΩ, 50 Ω

Polarity: Positive or negative

Direction: Forward

Quantity: 1

Connector: Female BNC

Related Features

< 1.25V and Min. 300mV > 1.25V and Max 10V

Propagation delay 0-99999 μS. Error bypass. (See F110 on

page 137)

The Time Interval - Event Time (TIET) option measures a 1 PPS or Event input signal on J1 against the XLi derived time. The rising edge of the pulse is measured against XLi time with 5 nS resolution.

Pulse Width 100 nS, min.

Active Edge: Rising

Amplitude (DC):

Logic Low: Logic Hi:

Impedance: 100 kΩ, 50 Ω

< 1.25V and Min. 300mV > 1.25V and Max 10V

Polarity: Positive

Resolution: 5 nS, Single Shot

Accuracy

Refer to

“System Time & Frequency Accuracy” on page 6

See “F110 – J1 Input (Time Code, TIET)” on page 137.

Note: Any stray input capacitance loading will impact TIET measurements

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J2 Output – Rate Out or Programmable Pulse Output

Rate: 1 PPS, 10 PPS, 100 PPS, 1 kPPS, 10 kPPS, 100 kPPS, 1 MPPS, 5

MPPS, 10 MPPS, PPO (if PPO option is installed)

Duty cycle: 40-60% ± 10%

Amplitude (TTL): TTL Levels into 50 Ω

Quantity: 1

Connector: Female BNC

Factory Configuration: The Rate Output is default 10 MPPS

The Programmable Pulse Output (PPO) option (part number 87-8024) generates a precisely synchronized trigger pulse at an arbitrary time and with arbitrary pulse width in integer multiples of 1 μS. The start and stop edges of the PPO can be programmed with 1 μS resolution.

Pulse Width: Programmable in 1 μS steps

Start: Rising

Stop: Falling

Amplitude: TTL levels into 50 Ω

Accuracy

Refer to

“System Time & Frequency Accuracy” on page 6

See “F111 – J2 Output (Rate, PPO)” on page 142.

J3 Input – Auxiliary Reference or Frequency Measurement

Auxiliary Reference (Aux Ref):

Frequency: 1, 5, 10 MHz

Amplitude: 1 Vp-p to 10 Vp-p at 1 kΩ to ground

Amplitude: 1 Vp-p to 3 Vp-p at 50 Ω to ground

Impedance: Configurable 1 kΩ or 50 Ω to ground

SNR: >20db

Quantity: 1

Connector: Female BNC

Factory Configuration: Disabled

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The Frequency Measurement (Freq Meas) option: measures an external frequency applied to the J3 input relative to the XLi’s disciplined frequency.

Frequency: 1, 5, 10 MHz

Resolution 120 x 10-12@ 1 Second Interval

12 x 10-12@ 10 Second Interval 1 x 10-12@ 100 Second Interval

Range 1000 x10-6

Impedance: 1 kΩ, 50 Ω

Factory Configuration: Disabled

Accuracy

See “F113 – J3 Input (Aux Ref, Freq Meas)” on page 146.

Refer to

“System Time & Frequency Accuracy” on page 6

1 PPS – Pulse Per Second Output

Pulse width: 20 μS ±1 μS

On time edge: Rising

Amplitude: TTL Levels into 50 Ω

Quantity: 1

Connector: Female BNC

If a time reference is unavailable, 1 PPS is as stable as the frequency reference (e.g., the system oscillator or Aux Ref).

CODE – Time Code Output

Time Code Output Specifications - Modulated (AM) and Demodulated (DC or DCLS)

Format: IRIG-B120, B000, B120 1344, B000 1344

IRIG-A130, A000 NASA 36

Amplitude (AM): 3 Vp-p, into 50Ω ±10%

Ratio (AM): 3:1 ±10%

Amplitude (DC): TTL into 50Ω

Quantity: 1

Connector: Female BNC

Phasing: In phase with carrier ± 10 μS

Default Configuration: IRIG-B 120

Many IRIG reader devices only decode the BCD time-of-year (TOY) portion of the IRIG frame. Reader devices designed to the IRIG-B122, B002, A132, A002 standard should be compatible with the XLi’s time code outputs.

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ALARM Output

High Z: Power off

High Z: Alarm (enabled alarm fault)

Low Z: Normal (no enabled alarm faults)

Drive: Open Collector

Max. Voltage: 25 VDC

Max. Current: 50 mA

Quantity: 1

Connector: Female BNC

Time Code Output IRIG-B120 w/ IEEE1344

The selectable Code output has an additional selection for IRIG-B-120 w/ IEEE1344. Configuration is via the Keypad / Display, RS232/422 and the Network port via telnet and HTML.

IRIG-B-120 IS DEFINED IN IRIG STANDARD 200-04 AS:

• Format B 100 pps

• 1 = Sine wave amplitude modulated

• 2 = 1KHz carrier/1mSec resolution

• 0 = BCD TOY,CF,SBS

IEEE1344 IS DEFINED IN IEEE1344-1995(R2001) ANNEX F AS:

IRIG-B format, <sync>SS:MM:HH:DDD<control bits> <binary seconds>

where

<sync> is the on time marker

SS seconds 00-59 (60 during leap seconds)

MM minutes 00-59

HH hour of day 00-23

DDD day of year 001-366

<control> 27 binary control characters, see Table 1 (reference IEEE1344)

<binary seconds> binary seconds of day

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Table 1:

Binary Time

quality

1111 Initial condition clock unlocked or 10Sec < ETE

1011 Clock unlocked and 1Sec < ETE <= 10Sec

1010 Clock unlocked and 100mSec < ETE <= 1Sec

1001 Clock unlocked and 10mSec < ETE <= 100mSec

1000 Clock unlocked and 1mSec < ETE <= 10mSec

0111 Clock unlocked and 100uSec < ETE <= 1mSec

0110 Clock unlocked and 10uSec < ETE <= 100uSec

0101 Clock unlocked and 1uSec < ETE <= 10uSec

0100 Clock unlocked and 100nSec < ETE <= 1uSec

0011 Clock unlocked and 10nSec < ETE <= 100nSec

0010 Clock unlocked and 1nSec < ETE <= 10nSec

0001 Clock unlocked and ETE <= 1nSec

0000 Clock locked to a reference source

Xli Estimated Time Error (ETE)

OUTPUT:

• Amplitude (AM): 3 Vp-p ±10%, into 50

• Ratio (AM): 3:1 ±10%

•Qty: 1

• Connector: BNC female

• Phasing: In phase with the XLi 1PPS ± 10 us

Time Code Output IRIG-B000 w/ IEEE1344

The selectable Code output has an additional selection for IRIG-B-000 w/ IEEE1344, configuration is via the Keypad / Display, RS232/422 and the Network port via telnet and HTML.

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IRIG-B-000 IS DEFINED IN IRIG STANDARD 200-04 AS:

• Format B 100 pps

• 0 = Pulse width code

• 0 = No carrier/index count interval

• 0 = BCD TOY,CF,SBS

IEEE1344 IS DEFINED IN IEEE1344-1995(R2001) ANNEX F AS:

See above

OUTPUT:

• Amplitude (DC): TTL into

50 Ω

•Qty: 1

• Connector: BNC female

• Phasing: In phase with the XLi 1PPS ± 200ns

Time Code Input IRIG-B120 w/ IEEE1344

The selectable Code input has an additional selection for IRIG-B-127. Configuration is via the Keypad / Display, RS232/422 and the Network port via telnet and HTML.

IRIG-B-120 IS DEFINED IN IRIG STANDARD 200-04 AS:

• Format B 100 pps

• 1 = Sine wave amplitude modulated

• 2 = 1KHz carrier/1mSec resolution

• 0 = BCD TOY,CF,SBS

IEEE1344 IS DEFINED IN IEEE1344-1995(R2001) ANNEX F AS:

See section TIME CODE OUTPUT IRIG-B120 200-04 W/ IEEE1344 for definition

XLI SYNC:

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The XLi first synchronizes to IRIG-B-120 w/ IEEE1344 when the Time Quality control bits are = 0000. The XLi remains synchronized (Locked) while the Time Quality control bits are 0000 through 0101 (ETE < 10uSec). The XLi utilizes the IRIG-B-120 BCD TOY, IEEE1344 year, leap second, and leap second pending bit as the UTC epoch. The XLi time format selection remains on the XLi including the Daylight saving time offset.

INPUT:

• Amplitude (AM): 0.5 Vp-p to 10 Vp-p, 100 k

• Ratio (AM): 3:1 ±10%

•Qty: 1

• Connector: BNC female

Ω to ground

Time Code Input IRIG-B000 w/ IEEE1344

The selectable Code input has an additional selection for IRIG-B-000 w/ IEEE1344. Configuration is via the Keypad / Display, RS232/422 and the Network port via telnet and HTML.

IRIG-B-007 IS DEFINED IN IRIG STANDARD 200-04 AS:

• Format B 100 pps

• 0 = Pulse width code

• 0 = No carrier/index count interval

• 0 = BCD TOY,CF,SBS

IEEE1344 IS DEFINED IN IEEE1344-1995(R2001) ANNEX F AS:

See section TIME CODE OUTPUT IRIG-B120 W/ IEEE1344 for definitions

XLI SYNC:

The XLi first synchronizes to IRIG-B-120 w/ IEEE1344 when the Time Quality control bits are = 0000. The XLi remains synchronized (Locked) while the Time Quality control bits are 0000 through 0101 (ETE < 1uSec). The XLi utilizes the IRIG-B-120 BCD TOY, IEEE1344 year, leap second, and leap second pending bit as the UTC epoch. The XLi time format selection remains on the XLi including Daylight saving time offset.

Input:

• Amplitude (DC): Logic Low < 1.25V >0V

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Logic Hi >2.5V < 10V

• Impedance: 100K, or 50

•Qty: 1

• Connector: BNC female

Ω.

Manual Leap Second Entry

The Manual Leap Second Entry is configurable via the Keypad / Display, RS232/422 and the Network port via telnet and HTML. This function allows the user to enter leap second data. This mode of operation will allow the user to maintain UTC with the XLi clock without an external time reference providing leap second data or in a standalone mode (i.e. without a time reference).

Locked reference sources containing leap second data (GPS and IRIG-B w/ IEEE1344) take priority to the manual leap second entry.

Manual leap second data is applied to the XLi UTC TOD when locked to any reference source that does not contain leap second data.

The manual leap second data will be applied to the clock at the end of the current quarter that it was entered at UTC midnight on the last day of March, June, September, or December

The function is selectable by:

1. Enter / Request the current GPS leap second, e.g. 14.

2. Enter / Request the leap second, adding or subtracting in March, June, September, or December

HaveQuick TFOM

The following Time Figure of Merit Code has been added to the HaveQuick output

Table 2:

TFOM code bits Meaning

0 0 0 0 locked

1 1 1 1 unlocked

All others Not used

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Certifications

UL, C-UL: UL 1950/CSA 22.2 950, Standard for Safety, Information Technology

Equipment (ITE)

FCC: FCC Part 15, Subpart B

CE: 89/336/EEC EMC Directive

73/23/EEC Low Voltage Safety Directive IEC 60950 Safety of Information Technology Equipment (ITE)

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3: Installation/Configuration

Installing the GPS Antenna

For units that include the GPS option, install the GPS antenna and cable as described below.

Selecting a GPS Antenna Site Outdoors

Select a site that...

• Is the highest point available

• Offers a full 360° view horizontally, to within 10° vertically of the horizon

• Is higher than neighboring buildings/obstructions

• Is protected from strong radio frequency (RF) and microwave transmissions

• Is set away from RF-reflective surfaces that cause multipath interference

• Is set 3 ft. (1 m) away from other GPS antennas

Avoid...

• Mounting the antenna between tall buildings or next to walls and equipment

• Cable runs from the antenna to the receiver that exceed the specified length

• Patching multiple cables together to make a single cable run

• Running the cable through bulkheads and along side high-energy cables

• Crimping or damaging the cable

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 due to 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.

Mounting the GPS Antenna

Mount the GPS antenna on an antenna mast (recommended) or on the peak of a building. The GPS antenna kit includes special mounting brackets. For the mast, use 2-inch (5.08-cm) diameter water pipe or conduit that is rigid enough to withstand high winds without flexing. Use guy wires to stabilize masts longer than 10 ft. (3.048 m).

Notes:

• The XLi requires a 12 Volt-compatible antenna. Antennas not rated for 12 V will be damaged.

• Use a splitter to connect a GPS antenna to multiple receivers. Avoid using BNC “T” connectors.

• The L1 GPS antenna is designed to operate with up to 150 ft. (60.96 m) of RG-59 coax cable. An optional Down Converter can be used for cable runs of 1,500 ft. (457.2 m) using RG-58 coaxial cable.

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+ 288 hidden pages

Symmetricom XLi User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual