Symmetricom XLi IEEE 1588 User Manual

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XLi IEEE 1588 Clock

User Guide

997-01510-03, Rev. C, December 2006

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 XLi hardware or software.

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1: Overview and Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1

Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1

Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1

Standard Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1

1588-Related Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2

IEEE 1588 card . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2

IEEE 1588 Subsystem . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2

Physical . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2

Network Port (“1588”) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3

PPS Output (“SYNC OUT”) . . . . . . . . . . . . . . . . . . . . . . . . . . . .3

Behavior . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3

User Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3

LEDs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4

GPS C/A Receiver (87-8028-2) . . . . . . . . . . . . . . . . . . . . . . . . . . . .4

Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4

Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5

Standard TCVCXO Oscillator . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5

Standard 110 VAC Power Supply . . . . . . . . . . . . . . . . . . . . . . . . . .6

Clock Architecture . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7

2: System Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9

Mechanical/Environmental . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9

AC Power Supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9

System Time & Frequency Accuracy . . . . . . . . . . . . . . . . . . . . . . . . .10

GPS Receiver . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10

Aux Ref Input . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10

Chassis . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10

Standard Inputs and Outputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11

Serial I/O Port . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11

NET – Network Port . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11

J1 Input – Time Interval - Event Time . . . . . . . . . . . . . . . . . . . . . .12

J2 Output – Rate Out . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12

J3 Input – Auxiliary Reference . . . . . . . . . . . . . . . . . . . . . . . . . . .13

1 PPS – Pulse Per Second Output . . . . . . . . . . . . . . . . . . . . . . . .13

CODE – Time Code Output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13

ALARM Output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14

Certifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14

3: Installation and Set-up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15

Installing the GPS Antenna . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15

Selecting a GPS Antenna Site . . . . . . . . . . . . . . . . . . . . . . . . . . . .15

Verifying the Site . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16

Mounting the GPS Antenna . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16

GPS Signal Strength Requirements . . . . . . . . . . . . . . . . . . . . . . .17

Making Additional Connections and Powering Up . . . . . . . . . . . . . . .18

Configuring Network Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19

Configuring the XLi . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19

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Configuring the IEEE 1588 Card(s) . . . . . . . . . . . . . . . . . . . . . . . . . 20

PTP Master . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

PTP Slave . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

Rack Mounting the XLi . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

4: User Interfaces . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .25

Alarm Status LED . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

Keypad/Display Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

Time Display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

Status Display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

Menu Display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

Keypad Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

Keypad Examples . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

Command Line Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

Logging In . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

Operator Login . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

Guest Login . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

Logging Out . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

Changing Username and Password . . . . . . . . . . . . . . . . . . . . . . . 30

Session Timeout and Priority . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

Web Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

User Privileges . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

Sessions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

User Names and Passwords . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

Logging In . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

Navigating . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

Submitting Changes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33

Logging Out . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33

Notes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33

5: Function Reference . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .35

Function Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35

F1 – Time Zone Offset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38

F2 – 12/24 Hour Format . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39

F3 – Time & Date . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40

F4 – Serial Port Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42

F5 – Time-Quality Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43

F6 – Keypad Lock . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45

F8 - Continuous Time Once-per-Second . . . . . . . . . . . . . . . . . . . . . 46

The Format of the F8 Output String . . . . . . . . . . . . . . . . . . . . . . . 47

While Synchronizing to a Reference Source . . . . . . . . . . . . . . . . 48

After Loosing a Reference Source . . . . . . . . . . . . . . . . . . . . . . . . 48

F9 - Time On Request . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49

F11 - Time Output Format . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50

F13 – Time Error . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52

F18 – Software Version Request . . . . . . . . . . . . . . . . . . . . . . . . . . . 53

F27 – FTM III Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53

F42 – Multicode Output Configuration . . . . . . . . . . . . . . . . . . . . . . . 53

F44 – N.8 Frequency Synthesizer . . . . . . . . . . . . . . . . . . . . . . . . . . 53

F50 – GPS Receiver LLA/XYZ Position . . . . . . . . . . . . . . . . . . . . . . 53

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F51 – GPS Antenna Cable Delay . . . . . . . . . . . . . . . . . . . . . . . . . . .55

F52 – Distribution Cable Delay . . . . . . . . . . . . . . . . . . . . . . . . . . . . .57

F53 – GPS Operation Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .58

F60 – GPS Receiver Satellite List . . . . . . . . . . . . . . . . . . . . . . . . . . .60

F66 – Daylight Saving Time (DST) Mode . . . . . . . . . . . . . . . . . . . . . .63

F69 – Time Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .65

F71 – Oscillator Statistics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .67

F72 – Fault Status . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .68

F73 – Alarm Control / Status . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .69

F74 – Clock Source Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .77

F90 – Code Output Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . .78

F100 – Network Port Configuration & XLi Firmware . . . . . . . . . . . . .80

F100 EA – Ethernet Address . . . . . . . . . . . . . . . . . . . . . . . . . . . . .82

F100 IP – IP Address . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .82

F100 SM – Subnet Mask . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .83

F100 G – Gateway . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .84

F100 IC – Network Port Settings . . . . . . . . . . . . . . . . . . . . . . . . . .85

F100 BASET – 10/100 BASE- T . . . . . . . . . . . . . . . . . . . . . . . . . .85

F100 L/LOCK/UNLOCK – Remote Lockout . . . . . . . . . . . . . . . . .86

F100 L – Remote Lockout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .87

F100 ST – Self Test Status . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .88

F100 BH – Burn Host . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .89

F100 BUB – Burn BootLoader . . . . . . . . . . . . . . . . . . . . . . . . . . . .89

F100 BU – Burn . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .90

F100 BF – Burn File System . . . . . . . . . . . . . . . . . . . . . . . . . . . . .91

F100 BUFP – Burn FPGA Firmware . . . . . . . . . . . . . . . . . . . . . . .91

F100 CONFIG – Configure NTP & SNMP . . . . . . . . . . . . . . . . . . .92

F100 J – Factory Mode Jumper . . . . . . . . . . . . . . . . . . . . . . . . . . .93

F100 K I L L – Reboot . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .94

F100 P – Change User Password . . . . . . . . . . . . . . . . . . . . . . . . .95

F100 PI – PING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .96

F100 PN – Change User Name . . . . . . . . . . . . . . . . . . . . . . . . . . .97

F108 – Oscillator Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . .98

F110 – J1 Input (TIET) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .99

F111 – J2 Output (Rate) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .102

F113 – J3 Input Configuration (Aux Ref) . . . . . . . . . . . . . . . . . . . . .104

F116 – Display Brightness Level . . . . . . . . . . . . . . . . . . . . . . . . . . .106

F117 – Factory Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .107

F118 – Option Board Configuration . . . . . . . . . . . . . . . . . . . . . . . . .108

F119 – GPS Receiver Configuration . . . . . . . . . . . . . . . . . . . . . . . .110

F120 - N.1 Frequency Synthesizer . . . . . . . . . . . . . . . . . . . . . . . . .114

F123 – Have Quick Input/1 PPS Sync Configuration . . . . . . . . . . . . 114

F126 – Options Key Entry . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .115

F128 – Have Quick Output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .115

F130 - Precision Time Protocol Status . . . . . . . . . . . . . . . . . . . . . . . 116

F131 - Precision Time Protocol Network Config . . . . . . . . . . . . . . . 119

Option bay location of the IEEE 1588 cards . . . . . . . . . . . . . . . . 119

Static IP address, subnet mask and default gateway for the network port 119

DHCP enabled/disabled . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .120

DHCP-assigned IP address, subnet mask and default gateway for the network port 120

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PTP Sync message interval . . . . . . . . . . . . . . . . . . . . . . . . . . . . 120

PTP burst mode enabled/disabled . . . . . . . . . . . . . . . . . . . . . . . 121

PTP network port enabled/disabled . . . . . . . . . . . . . . . . . . . . . . 121

PTP subdomain same . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 121

Reset PTP settings to factory defaults . . . . . . . . . . . . . . . . . . . . 121

PTP initialize to user entered values . . . . . . . . . . . . . . . . . . . . . 121

PTP Master or Slave (PRI/SEC/STBY) . . . . . . . . . . . . . . . . . . . 122

PTP Slave Synchronization Threshold . . . . . . . . . . . . . . . . . . . . 122

PTP Preferred Master Configuration . . . . . . . . . . . . . . . . . . . . . 122

Request a summary of the PTP card configuration . . . . . . . . . . 125

Set Internet Configuration settings . . . . . . . . . . . . . . . . . . . . . . . 125

Set the IP Address . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 126

Set the Subnet Mask . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 126

Set the Default Gateway . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 127

Setting the Internet Configuration . . . . . . . . . . . . . . . . . . . . . . . . 128

Enable/Disable DHCP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 128

Get PTP Protocol settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 129

Request the PTP Subdomain Name . . . . . . . . . . . . . . . . . . . . . 130

Set the PTP Subdomain Name . . . . . . . . . . . . . . . . . . . . . . . . . 130

Reset the PTP Parameters to the Factory Default settings . . . . 131

Initialize the PTP Protocol to User-entered Values . . . . . . . . . . 131

Configuring the PTP Reference Clock Settings . . . . . . . . . . . . . 132

Request the PTP Slave Synchronization Threshold . . . . . . . . . 133

Set the PTP Slave Synchronization Threshold . . . . . . . . . . . . . 133

Request the PTP Preferred Master Clock Configuration . . . . . . 134

Enable or Disable the PTP Preferred Master Clock Configuration 134 F131 B<N> S<CR> REQUEST PTP NETWORK PARAMETERS STATUS 134

9: XLi-Generated Messages 137

Error Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 137

Informational Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 139

A: Using F100 Configuration 141

Configuring SNMP Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . 141

Overview of Steps . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 141

Set up the FTP Server . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 141

Get the IP Address of the FTP Server/Workstation . . . . . . . . . . 141

Copy the Configuration Files to the FTP Server . . . . . . . . . . . . . 142

Edit the Configuration Files . . . . . . . . . . . . . . . . . . . . . . . . . . . . 142

Move the Configuration Files Back to the XLi . . . . . . . . . . . . . . 143

B: Upgrading System Firmware 145

Overview of Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 145

Set up the FTP Server . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 145

Open a Command Line Session on the XLi . . . . . . . . . . . . . . . . 145

Upgrade the Firmware . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 146

Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 148

FAQ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 149

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C: SNMP 151

SymmetricomTtm-SMIv2.mib . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .151

xliMainCard-SMIv2.mib . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .161

xli-SMIv2.mib . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .165

xliSystem-SMIv2.mib . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .165

Editing snmp.conf . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .176

SNMP Private Enterprise MIB Structure . . . . . . . . . . . . . . . . . . . . .177

SNMP Addressing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .177

New Top Level Structure of Enterprise MIB for XLi . . . . . . . . . . .177

XLi System Group . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .179

The XLi Fault Group . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .180

The XLi System Status Group . . . . . . . . . . . . . . . . . . . . . . . .181

XLi MainCard Group . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .182

XLi Traps . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .182

Future Expansion . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .182

Glossary of SNMP-Related Terms . . . . . . . . . . . . . . . . . . . . . . . .183

Configuring and Testing SNMP . . . . . . . . . . . . . . . . . . . . . . . . . . . .184

Materials Needed . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .184

HP OpenView Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . .184

XLi Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .186

Test Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .186

E: Time Code Formats 189

Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .189

IRIG . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .189

Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .189

IRIG Code Format . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .189

IRIG-B Time Quality Flags . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .190

Output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .190

Input . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .190

NASA 36 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .190

Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .190

NASA 36 Code Format . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .191

Output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .191

Input . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .191

F: World Map of Time Zones: 193 G: Part Numbers 195 H: Sales and Customer Assistance 197 Glossary of IEEE 1588-related Terms 199 Index 201

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1: Overview and Features

Overview

Description

The standard XLi IEEE 1588 Clock, also referred to as the “XLi”, provides a complete implement ation of a Precise Time Protocol (PTP) “ordinary clock” over a dedicated IEEE 1588 card. The IEEE 1588 card can be configured to operate as a PTP grandmaster or as a PTP slave.

As a PTP grandmaster, the IEEE 1588 card typically synchronizes PTP slaves on the network to International Atomic Time (TAI). The XLi IEEE 1588 Clock derives TAI from the Global Positioning System (GPS). In addition, Symmetricom designed the XLi IEEE 1588 Clock so the user can distribute Coordinated Universal Time (UTC) or user-entered time over PTP.

As a PTP slave, the IEEE card automatically discovers a PTP master within its subnet/subdomain and synchronizes to it. The PTP slave in turn, can be configured as the primary reference source for the XLi IEEE 1588 Clock (the clock synchronizes to the PTP slave).

The XLi’s Time Interval/Event Time (TIET) feature can be used to measure PTP synchronization across timing networks. For example, to measure a PTP slave’s synchronization to the PTP grandmaster, the user connects the PPS output of a PTP slave to the XLi IEEE 1588 Clock and configures F110 to display the time interval between each PPS.

See F130 - Precision Time Protocol Status

Config (page 119) for more information.

Standard Configuration

(page 116) and F131 - Precision Time Protocol Network

The XLi IEEE 1588 Clock can be purchased in two configurations. The first configuration includes one IEEE 1588 card preconfigured as a PTP master and located in Option Bay 4. The second configuration has an additional IEEE 1588 card preconfigured as a PTP slave located in Option Bay 2. Both configurations include the following items.

• XLi chassis and CPU card running special firmware

• The IEEE 1588 card(s)

• GPS C/A Receiver (87-8028-2)

• L1 GPS Antenna

• GPS antenna cable: 50 ft. (15.24 m) of RG-59

• Time Interval Event Time (TIET)

• Standard 110 VAC Power Supply

• Standard TCVCXO Oscillator

1. Other GPS antenna cable lengths can be specified at the time of purchase.

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Only the features listed above are supported for the XLi IEEE 1588 clock. At the time of this writing, none of the other options for the XLi Time and Frequency system are supported on the XLi IEEE 1588 clock. Contact Symmetricom Sales to obtain a special supported configuration of the XLi IEEE 1588 clock. For contact information, please see Sales and Customer Assistance (page 197).

1588-Related Specifications

The specifications in this section cover options included as standard features in the XLi IEEE 1588 Clock. See also “2: System Specifications” on page 9.

IEEE 1588 card

IEEE 1588 Subsystem

Compliance: IEEE 1588-2002 While operating as Grandmaster:

• Time stamp accuracy is equivalent to XLi clock accuracy: Please consult the datasheet online.

• Sync Intervals: 1, 2, 8, 16, and 64 seconds

• Packet throughput: >100 Delay_Req/second

• Delay_Req buffer: 256 time stamps

While operating as a Slave:

• Sync accuracy to master via crossover cable: Please consult datasheet online.

• Sync Interval: 2 seconds

Physical

Size: One option bay (1.9 cm h x 10.5 cm w x 17.4 d) Connectors: One network port (RJ-45), labelled “1588”

One PPS output (BNC), labelled “SYNC OUT”

LEDs See “LEDs”, page 4.

1. http://www.symmttm.com/pdf/gps/DS_XLi1588.pdf

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Network Port (“1588”)

A IEEE1588-compliant “ordinary clock” is available from a stand-alone Ethernet port, labelled “1588”, on the rear panel of the IEEE 1588 card.

Type: Standard RJ-45 8-pin connector, 100 Base-T Qty: 1 Packet type

Protocols

Ethernet DIX II (RFC 894) IPV4, IEEE1588, 802.3, ARP, and PING

PPS Output (“SYNC OUT”)

A raw unfiltered PPS output is available from the stand-alone BNC connector, labelled “SYNC OUT”, on the rear panel of the IEEE 1588 card.

The PPS Output from the IEEE 1588 card while configured as a PTP master:

• 50% duty-cycle, +/-10% typical

• Please consult the datasheet online for additional specifications.

Behavior

The IEEE 1588 card can function as:

• PTP Grandmaster

- Best Master

- Preferred Master

• PTP Slave

- Primary Reference

- Secondary Reference

- Standby

User Interface

All of the IEEE 1588 card’s functions can be managed using the Web Interface (page 31), Command Line Interface (page 29), or Keypad/Display Interface (page 25).

The following 1588-related functions are available from the command and keypad/display interfaces:

• F130 - Precision Time Protocol Status

• F131 - Precision Time Protocol Network Config

1. http://www.symmttm.com/pdf/gps/DS_XLi1588.pdf

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(page 116)

(page 119)

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LEDs

The following LEDs are available on the IEEE 1588 card rear panel:

• Network Port (1588), Green and Amber LEDs illuminate when receiving or transmitting network traffic.

• PPS: LED illuminates (green) while the SYNC OUT signal is high. See “PPS Output (“SYNC OUT”)” on page 3.

• TX: LED illuminates (green) with transmission of a PTP packet.

• RX: LED illuminates (green) with arrival of a PTP packet.

• M/S: 1588 port operating as PTP master or slave:

- Green: PTP master.

- Amber: PTP slave.

ENA: Indicates the state of the 1588 port whether the 1588 software is running:

• Green: 1588 port is enabled, and the 1588 software is running.

• Amber: 1588 port is disabled, and the 1588 software is running.

• Red: The state of the 1588 port is unknown, and the 1588 software is not running.

See “F131 - Precision Time Protocol Network Config” on page 119.

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

Introduction

The GPS C/A Receiver acts as a S tratum 0 timing reference source to the XLi. It tr acks 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 available and enabled, the GPS C/A Receiver card provides superior time and frequency accuracy on the XLi (See “ Receiver card comes with an L1 GPS antenna, cabling, and mounting hardware unless otherwise specified at the time of purchase.

The GPS C/A Receiver uses a TRAIM (Time Receiver Autonomous Integrity Monitoring) algorithm to monitor the integrity of the receiver’s timing solution. Using redundant measurements, TRAIM detects and quarantines anomalous GPS signals, independent of the GPS health ephemeris data. The quarantined signal is excluded from the timing solution for 12 hours before it is requalified for inclusion in the timing solution.

See “

Installing the GPS Antenna” on page 15 for information on selecting an antenna site, mounting the

antenna, and signal strength requirements. The GPS C/A Receiver card can be managed and configured using F53 – GPS Operation

Mode (page 58) and F119 – GPS Receiver Configuration (page 110).

System Time & Frequency Accuracy” on page 10). The GPS C/A

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Specifications

Frequency 1575.42 MHz (L1 signal) Code Coarse Acquisition (C/A) code Tracking Up to 12 satellites with TRAIM Position Accuracy Typically < 10m when tracking four (4) satellites TRAIM Mask 1 μS 1 PPS Accuracy UTC-USNO ±30 ns RMS 100 ns Peak Time standard: UTC or GPS Antenna input Female BNC Antenna Power 20 mA – 220 mA, +12 V

Standard TCVCXO Oscillator

Frequency/Timing Allan Deviation, Stability

Temp Drift Rate

-9

1 x 10 2 x 10 3 x 10

5x10 5 x 10

@ 1 sec

-10

@ 1K sec

-12

@ 1 day

-7

, over 0°C to 50°C when not locked to a reference

-9

/ Day

The XLi comes with the standard TCVCXO oscillator described below. The stability of the following oscillators is dependent on the reference source. For reference source accuracies, see “

System Time &

Frequency Accuracy” on page 10 .

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Standard 110 VAC Power Supply

The XLi’s internal fault detector can monitor the three output voltages from the primary and the secondary power supplies. With the Primary Power or Secondary Power indicators in F73 enabled, a 10% decrease in any of the output voltages triggers an alarm. See “

page 69.

Warning: Ensure that a disconnect device, such as a switch, with the appropriate volt age/current ra ting, is provided when operating/installing the XLi.

Warning: Prior to servicing the interior of a unit with dual power supplies, remove both power cords.

Input connector: IEC 320 type Input voltage range: Universal, 90 – 260 VAC and 110 – 370 VDC Input frequency range: 47 Hz – 440 Hz Isolation, ground: For 110-370 VDC operation, the input is fully floating. Either

input polarity may be strapped to chassis ground. Isolation: 1,500 VAC, input to ground Output Specifications: +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

F73 – Alarm Control / Status” on

Fan: Exhaust 3-6CFM

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Clock Architecture

Figures 1 and 2 on the following pages provide a simplified view of the standard XL i's clock a rchitectu re.

16.384 MHz Osc. PLL

Aux Ref

1,5,10 MHz

Phase Measurement

1 PPS A

1PPS B

Code Input

DAC

10 MHz Osc.

1 PPS

Timing

Select

Time and Clock

Recovery

Code Input

Clock DPLL

200 MHz PLL

Phase Compare

Clock Machine

Code Generation

1 PPS

Output

Code Out

1 PPS Out

Code Out

Rate Gen

Rate Out

Figure 1: Functional Timing Block Diagram

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Display Rb Power

Display/Keypad Interf ace

I/O

Power Supply AC

+5 V, +/- 12 V

110/220 AC

Keypad Oscillator

Backplane Interface

Power

Power Supply

DC +5 V, +/- 12 V

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

10 MHz

Option

User I/O

I/O

Power

Power, Vc

I/O

T&F CPU

User I/O

Figure 2: Interface Architecture Block Diagram

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2: System Specifications

Mechanical/Environmental

Power: 95-260 VAC, 47 to 440 Hz 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. TIME mode displays Time and Day of Y ea r (T OD) 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 Vibration Operating: GR-CORE-63, 4.5.2/4, locked to 1.0 g Storage Transport: GR-CORE-63.4.4.1 to 1.5g

AC Power Supply

Input:

Input connector: IEC 320 connector

Input voltage range: Universal, 90 – 260 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 voltag e decreases by 10%.

Alarm Status LED: Green LED on with no fault and AC power applied. Green LED of f 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. Currently, GPS is the only supported reference source.

GPS Receiver

1 PPS Output: ±30 ns RMS, 100 ns peak without SA (99%) Frequency Output Accuracy:

Frequency/Timing, Allan Deviation, Stability:

< 2x 10 1 x 10

2 x 10 1x 10

-12

-9

@ 1 sec

-10

@ 1000 sec

-12

@ 1 day AM Code Output Accuracy: 10 DC Level Shift Code Output

Accuracy: Time to System Lock <20 min. typical

μS to the 1 PPS

200 ns to the 1 PPS

See GPS Signal Strength Requirements (page 17) and GPS C/A Receiver (87-8028-2) (page 4).

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

-12.

Note: To set the time and date manually, see “F3 – Time & Date” on page 40.

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

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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 42.

NET – Network Port

The Ethernet port interface has a standard RJ-45 connector that provides IEEE 802.3 frame 10/100 Base-T Ethernet. See “

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F100 – Network Port Configuration & XLi Firmware” on page 80.

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J1 Input – Time Interval - Event Time

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: < 1.25V and Min. 300mV

Logic Hi: >1.25V and Max 10V Impedance: 100 k Resolution: 5 ns, Single Shot Accuracy

F110 – J1 Input (TIET)” on page 99.

See “

Ω, 50 Ω

Refer to

“System Time & Frequency Accuracy” on page 10

Note: Any stray input capacitance loading will impact TIET measurements Note: Configuring J1 as the input for a time code reference source is not supported.

J2 Output – Rate Out

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

MPPS, 10 MPPS Duty cycle: 40-60% Amplitude (TTL): TTL Levels into 50 Quantity: 1 Connector: Female BNC

± 10%

Factory setting: 10 MPPS

See “F111 – J2 Output (Rate)” on page 102.

Note: Configuring J2 as a Programmable Pulse Output (PPO) is not supported.

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J3 Input – Auxiliary Reference

Auxiliary Reference (Aux Ref):

Frequency: 1, 5, 10 MHz Amplitude: 1 Vp-p to 10 Vp-p at 1 k Amplitude: 1 Vp-p to 3 Vp-p at 50 Impedance: Configurable 1 k SNR: >20db Quantity: 1 Connector: Female BNC Factory Configuration: Disabled

F113 – J3 Input Configuration (Aux Ref)” on page 104.

See “

Ω or 50 Ω to ground

1 PPS – Pulse Per Second Output

Pulse width: 20 On time edge: Rising Amplitude: TTL Levels into 50 Quantity: 1 Connector: Female BNC

μS ±1 μS

Ω to ground

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

CODE – Time Code Output

Format: IRIG-B 000, IRIG-B 120, IRIG-A 003, IRIG-A 133, and NASA 36 Amplitude (AM): 3 Vp-p, into 50 Ratio (AM): 3:1 Amplitude (DC): TTL into 50 Quantity: 1 Connector: Female BNC Phasing: In phase with carrier Factory setting: IRIG-B 120

Many IRIG devices only look at the BCD portion of the IRIG frame. Devices that use IRIG A002, B002 and B122 should be able to synchronize with the XLi’s time code outputs.

XLi IEEE 1588 Clock 13

±10%

Ω ±10%

± 10 μS

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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

Certifications

UL, C-UL: UL 1950/CSA 22.2 950, Sta ndard 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 and Set-up

In a nutshell:

• Install the GPS antenna outdoors, run the cable, and connect it to the XLi’s GPS receiver.

• Make the following connections to the XLi (all cables supplied):

- From the network to the NET port (for access to the command line and web interfaces).

- From an AC outlet to the XLi’s AC power supply.

• Configure the network settings of the XLi’s standard network port.

• Configure the network settings of the XLi’s IEEE 1588 network port.

Installing the GPS Antenna

Precise Time Protocol (P TP) grandmasters are typically synchronized to International Atomic T ime (TAI). To accomplish this, the user sets up the GPS antenna, connects it to the GPS receiver in the XLi IEEE 1588 Clock, and configures GPS as its primary reference source. When the XLi IEEE 1588 Clock locks to the GPS reference source, it computes TAI and synchronizes the PTP grandmaster (the IEEE 1588 card). When the PTP grandmaster is synchronized to the XLi IEEE 1588 clock it starts operating, sending out PTP Sync and Follow_Up messages and responding to PTP requests.

Selecting a GPS Antenna Site

Select a site outdoors 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

• Is within the maximum GPS antenna cable length from the XLi Typically, this site is on the roof of the building. Avoid...

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

• Exceeding the maximum cable-lengths specified for a particular cabling arrangement.

• 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

• Mounting within 15 meters/yards of lightning rods, tower, or structures that attract lightning

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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.

Verifying the Site

Verify that the length of cable from the GPS antenna site to the XLi does not exceed the maximum GPS antenna lengths recommended to meet the GPS signal strength requirements. 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.

Notes:

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

• Use a splitter, not a BNC “T” connector, when connecting an antenna to multiple receivers.

• The L1 GPS antenna is designed to operate with up to 150 ft. (45.72 m) of RG-59 coax cable.

•A line amplifier is available for cable runs between 150 - 300 ft. (46 - 91 m) in length (RG-59).

•A down-converter kit is available for cable runs of 1,500 ft. (457.2 m) in length (RG-58).

Mounting the GPS Antenna

Mount the GPS antenna on an antenna mast (recommended) or on the peak of a building. For the mast, use 2-inch (5.08-cm) diameter PVC 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). Avoid mounting the antenna on a tower, which requires a specialist to maintain.

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Figure 3: L1 GPS Antenna - methods for cabling and mounting

GPS Signal Strength Requirements

Refer to Figure 4:The required gain at the GPS receiver’s ANTENNA connector is greater than 20 dB and less than 36 dB. A 150 foot length of RG-59 coax cable of has a loss of 16-21 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 ,

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VSWR, and input impedance also affect system performance. Symmetricom recommends using the standard 12-volt capable antenna and cable provided with the GPS receiver.

Figure 4: GPS Signal Strength Requirements

Connect the GPS antenna cable to the GPS receiver’s ANTENNA connector at the rear of the XLi.

Note: Use a 12-volt capable GPS antenna.

Making Additional Connections and Powering Up

Make the following connections to the XLi (all cables supplied):

1. For access to the web and command line interfaces, connect NET network po rt (on the Main CPU Card, 87-8000) to the LAN using the Cat 5 network cable (supplied).

For local access to the command line interface only, connect the SERIAL I/O port (on the Main CPU Card, 87-8000) to the to the PC’s serial port using a null modem cable.

2. Connect the 1588 network port to the timing network.

3. Connect the AC Power Supply it to a power source. The green STATUS light on the power supply indicates that the XLi is receiving power.

Upon receiving power, the XLi goes through its startup sequence; displaying “BOOTING”, “LOADING”, and “ST ARTING”. After approxima tely 40 seconds, the XLi displays the clock status, and user interfaces (front panel/command line) become available. The IEEE 1588 card requires an additional 2 minutes to complete its startup sequence before it is available from the user interfaces.

Warning: Ensure that a disconnect device, such as a switch, with the appropriate voltage/

current rating is provided when operating/installing the XLi.

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Configuring Network Settings

The following steps are required to make the XLi’s Main CPU card operational on a network. Do this if you plan on using the command line or web interface to manage the XLi over the network.

Using the front panel keypad/display configure the network port settings as follows:

Press Result

ENTER Displays “FUNCTION” 100 Enters 100 as the function number

ENTER Displays Function 100’s first screen: “ ENTER Displays “ 1-9… Enter the unit’s IP Address (e.g., 192.168.0.11 ENTER Displays “ 1-9… Enter the Subnet Mask (e.g., 255.255.255.000) ENTER Displays “ 1-9… Enter the Default Gateway’s IP address (e.g., 192.168.0.1) ENTER Displays “ ENTER Displays “ ENTER (5 times) Displays “ ENTER Saves the new network parameters, and reboots the XLi

IP ADDRESS…”

SUBNET MASK…”

DEFAULT GATEWAY…”

10-100 BASE-T (CURR BW 10) - AUTO” REMOTE LOCKOUT – UNLOCK” (Leave unchanged) SAVE CHANGES – YES”

COMPANY 00-A0-69…”

Configuring the XLi

Enter the XLi’s IP address as the address in a browser and log on to the XLi’ s web interface. The factory set user name is “operator1” and the password is “zeus”. If this XLi was field-upgraded for IEEE 1588 operation, the password may also be “casey”.

• Click the Admin Home link and then the Accounts Admin link. Change the factory set user names and passwords.

• Click the Admin Home link and then the Option Bay # GPS M12 RECEIVER link.

- Verify that the Antenna Cable Delay is correct. For the standard 50 foot (15.24 m) coaxial

cable supplied with the GPS antenna, the Antenna Cable Delay is 60 ns. To compute the correct value for other antenna cable lengths, see “

page 55.

- Leave GPS Operation Mode as “Dynamic” and Time Reference as “Primary”.

• Click the GPS Config & Status link. After approximately 20 minutes of operation, check that GPS Clock Status is locked and GPS Antenna is OK.

- If GPS Antenna is OK and GPS Clock Status is unlocked, click the GPS Satellite List link.

The Tracked Satellite List should list four or more “current” GPS satellites. It may take significantly longer than 20 minutes for four or more “current” GPS satellites to appear if the GPS

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antenna is not in an optimal site or there is a problem with the antenna cable connections. If this delay is unexpected, consider relocating the GPS antenna to a better site or troubleshooting the GPS antenna cable.

• Press the ST ATUS key on the front panel. The display shou ld show “LOCKED GPS PRI” without

an asterisk (“*”). 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.

Configuring the IEEE 1588 Card(s)

Two versions of the XLi IEEE 1588 clock are currently available: The first version has:

• An IEEE 1588 card configured as a PTP master in Option Bay 4

• A GPS receiver in Option Bay 1

The second version has:

• An IEEE 1588 card configured as a PTP master in Option Bay 4

• An IEEE 1588 card configured as a PTP slave in Option Bay 2

• A GPS receiver in Option Bay 1

Note: With two IEEE cards, be mindful of the Option Bay number when changing the settings.

PTP Master

Note: The IEEE 1588 card requires 5 minutes from power up to initialize. Until then, the card does not

appear in the user interfaces, or is reported as "NOT AVAILABLE".

Function F131 is available for configuring IEEE 1588 cards. The IEEE 1588 card located in Option Bay 4 is preconfigured as a PTP master, as shown here:

• PTP AVAILABILITY - OPTION BAY 4

• PTP IP ADDRESS (STATIC) - 010.048.000.103

• PTP SUBNET MASK (STATIC) - 255.255.000.000

• PTP DEFAULT GATEWAY (STATIC) - 010.024.000.001

• PTP DHCP - ENABLE

• PTP SYNC INTERVAL - 2 SECONDS

• PTP BURST MODE - DISABLE

• PTP PORT STATE - ENABLE

• PTP SUBDOMAIN NAME - _DFLT

• PTP RESET TO FACTORY DFLT? - NO

• PTP INIT TO USER SETTINGS? - NO

• PTP CLOCK CONFIG, BAY 1 - MASTER

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• SLAVE SYNC THRESHOLD - 5 microsec

• PTP PREFERRED MASTER - DISABLE

Note: When two IEEE 1588 cards are present, use the up/down arrow keys to select the PTP master in

Option Bay 4 before making changes.

Using the familiar keypad display interface, modify the following F131 settings:

• If a DHCP server is not available on the timing network, disable DHCP and set static values for the PTP IP ADDRES, SUBNET MASK, and DEFAULT GATEWAY.

• Configure the following settings on so that the PTP master and PTP slaves match each other:

- PTP SYNC INTERVAL - The rate at which synchronization packets are sent out. The factory

setting, 2 seconds, is the recommended value.

- PTP BURST MODE - Enables quick and accurate synchronization. Generates additional net-

work traffic.

- PTP SUBDOMAIN - Defines the PTP master as a member of a logical timing network.

• (Recommended) Enable PTP PREFERRED MASTER to have P TP slaves on the timing network favor the PTP grandmaster over other potential masters.

IMPORTANT: If one of the PTP slaves on the timing network is a Symmetricom IEEE 1588 card, the interval for all PTP masters and PTP slaves must be set to 2 SECONDS.

PTP Slave

To reconfigure the IEEE 1588 card from being a PTP master to being a PTP slave, complete the following steps:

1. Having logged in to the web interface, from the Admin Homepage, click the link Option Bay 4 IEEE 1588 Master. The new 1588 web page takes approximately 5 seconds to load.

2. Set Clock Configuration to Slave Primary.

3. 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 nee d the hig her 1000 microsecond setting.

4. Click the Submit Changes button.

5. The front panel display should show "LOCKED PTP PRI" soon after.

The IEEE 1588 card is now operating as a PTP slave and is also functioning as the primary reference source to the PTP master. The GPS receiver, which was previously operating as the primary reference source to the IEEE 1588 clock, is now a STANDBY reference source.

1. After saving changes, if DHCP is enabled and a DHCP server is available, F131 displays the DHCP-assigned settings following the PTP DHCP ENABLE screen.

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Note: The IEEE 1588 card configured as a PTP slave relies on TAI as the time scale of the PTP master.

Distributing non-TAI time over PTP while the PTP slave is a reference source will have a predictable effect on the XLi’s system time.

Note: Later on, when reconfiguring the IEEE 1588 card as a PTP master, use F119 to set the GPS

receiver as the PRIMARY reference source. (In F119: Set GPS TIME REFERENCE, BAY 1 to PRIMARY.)

Note: For XLi IEEE 1588 Clocks with the second IEEE 1588 card in Option Bay 2 (preconfigured a PTP

slave, configure the network settings, PTP SYNC INTERVAL, PTP BURST MODE, and PTP SUBDOMAIN. The factory settings are the same as for the PTP master, except the static IP Address is 010.048.000.105 and Clock Configuration is Slave Primary.

Rack Mounting the XLi

The XLi comes with the following parts needed to mount the XLi securely in any EIA standard 19-inch (48.26-cm) rack:

• 2 mounting brackets

• 4 flat-head, Phillips screws

Have the following items ready and available:

• The appropriate AC source to connect to the XLi’s power supply.

• A #2 size Phillips bit screwdriver

To rack mount the XLi:

• Unscrew the four phillips-head screws from the front end of the side panels.

• Use the same screws to attach the rack mount brackets, as shown.

• Tighten the screws using a #2 size Phillips screwdriver.

• Position the XLi in any EIA Standard 19-inch (48.26 cm) rack system, and line up holes in the brackets with the holes in the rack.

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• Secure the brackets to the rack using rack mount screws.

Note: Ensure that the ambient operating temperature does not exceed +50° C. Install the XLi chassis so

that the top and bottom holes are unobstructed and have suf ficient clearance to allow 6 cfm of air to pass through the chassis. To maintain recommended operating temperatures, install a rackcooling fan capable of 100 cfm in heavily loaded racks.

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4: User Interfaces

The XLi features two user interfaces for controlling the XLi’s functions:

• A keypad/display interface

• A command line interface

• A web interface

There is also an Alarm Status LED

, available from a browser connected to the XLi’s network port.

on the front panel of the XLi

, available through the serial and network ports

on the front panel.

Alarm Status LED

The Alarm Status LED, located on the front panel, displays the alarm-state of the XLi unit. The LED has four states:

Dark Green Amber

Red

Notes:

= Power is off. = No F73-related alarms. The current reference source input is locked. = No F73 Alarms. Ti meout Delay is counting down, but hasn’t elapsed. The current reference

source input is unlocked (e.g. broken antenna cable or no GPS signal)

= An indicator in F73 has triggered an alarm. Check F73 to find out what the fault/unlock condition

is and take appropriate action.

• The amber LED can turn green again while the reference source input remains unlocked because:

- F119’s ‘GPS Status’ controls whether

- F73’s ‘Timeout Delay’ controls how long

• The blinking of the LED has no meaning. It is a user preference that can be enabled or disabled using the F73’s ‘LED Blink’ setting. If enabled, the LED blinks when it is green and yellow, but stays unblinking when it is red. If disabled, the LED doesn’t blink.

the LED turns amber.

the LED remains amber.

Keypad/Display Interface

Time Display

Press the TIME button on the keypad to display the time only. Use the TIME button to exit the STATUS, MENU, or function displays. The time format is DDD:HH:MM:SS.

200:21:24:09

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Time Display related functions:

• Select between the 12 or 24 hour format displayed: “

Time related functions:

F1 – Time Zone Offset” on page 38

• “

F2 – 12/24 Hour Format” on page 39.

• “F3 – Time & Date” on page 40

• “F66 – Daylight Saving Time (DST) Mode” on page 63

Status Display

The Status Display comes up automatically when the XLi is rebooted. To manually switch from another display to the Status Display, press STATUS button on the keypad. The keypad appears as follows:

LOCKED ∗ GPS PRI UTC 200:21:24:09 2002

where:

LOCKED = System Clock Status is Locked or Unlocked to the current reference source. See Clock

Status in

“F73 – Alarm Control / Status” on page 69

* = A reference source input has been configured, but is not available. (Note: When using

GPS, “*” may remain visible for up to 13 minutes) See

“F119 – GPS Receiver

Configuration” on page 110

GPS PRI = Shows the reference source type (The function that controls each one is noted below):

• GPS PRI, GPS SEC (

• PTP PRI, PTP SEC (“F131 - Precision Time Protocol Network Config” on

“F119 – GPS Receiver Configuration” on page 110)

page 119)

The “IRIG” and “AUX REF” reference sources are also possible, but not supported. Automatic switching between the reference sources listed above is controlled by

“F74 –

Clock Source Control” on page 77.

UTC =

Time display mode: GPS, UTC, TAI, Standard, or Local (

“F69 – Time Mode” on

page 65)

200:21:24:09 2002 =

The time, in DDD:HH:MM:SS YYYY format (

See “Time Display” on page 25.)

Menu Display

To use the XLi functions that are available from the keypad, press the MENU button on the keypad.

Function Summary” on page 35 lists which functions are available from the Menu Display.

“

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Pressing the MENU key on the front of the XLi displays the first function, F1: TIME ZONE OFFSET:

F1: TIME ZONE OFFSET

Pressing the UP ARROW key increments to the next function, F2 - 12/24 HOUR FORMAT, and so on. Pressing the DOWN ARROW key skips to the highest available function, F126 OPTIONS KEY ENTRY, and, from there, decrements through the functions.

The section, “ functions.

Keypad Operation

Use XLi’s front panel keypad to operate the menu-driven keypad/display interface.

5: Function Reference” on page 35, provides detailed information on all of the XLi’s

The following table explains how the individual keys work:

UP ARROW Increase value/Display next choice above DOWN ARROW Decrease value/Display next choice below RIGHT ARROW Move cursor right LEFT ARROW Move cursor left 0-9 Enter numeric values ENTER Enters currently displayed choice, e.g., a function or yes/confirmatio n to save changes CLR Clears the current selection/choice and returns to the last saved value TIME Displays the current time. Can also be used to exit a function without saving changes. STATUS Displays the clock status and time. Can be used to exit a function without saving

changes.

MENU Displays first item in function menu. Use UP/DOWN ARROWs to display other functions.

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Keypad Examples

The following examples show how to use the keypad effectively. To open a function using ENTER:

Press Result

ENTER Displays the “FUNCTION” prompt 2 Enter the function’s number (“2” in this example) ENTER Displays F2’s first screen, “

DISPLAY HOUR FORMAT: 24 HOUR”

To open a function using MENU:

Press Result

MENU Displays F1 on the front panel display UP/DOWN ARROW Scrolls through the list of functions ENTER Opens the function and displays its first screen

To change the settings in a function, and not save them:

Press Result

MENU Displays “F1: TIME ZONE OFFSET” ENTER Displays “ UP ARROW Changes the minus sign in “ RIGHT ARROW Moves the cursor to the right, under “ UP ARROW Changes “

TIME ZONE OFFSET –08:00”

– 08:00” to a plus in “+08:00”

0”.

0” to “1”, making “+18:00”

ENTER XLi asks “ UP ARROW Changes “ ENTER Abandons the changes and displays the Status Display

SAVE CHANGES? YES”

YES” to “NO”

Other ways to abandon new settings in a function:

Press Result

CLR Abandons all changes and displays to the first screen in the function TIME Abandons all changes, exits the function, and displays the Time Display STATUS Abandons all changes, exits the function, and displays the Status Display

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To enter numeric values in a function:

Press Result

ENTER Displays the “FUNCTION” prompt 3 Enters “ ENTER Opens Function 3, displays the first screen, “ ENTER Displays the second parameter, “ 05152002 Enters May 15, 2002 as today’s date. (replace) ENTER Displays “ ENTER XLi asks “ ENTER Selects “

Command Line Interface

To open a command line session, connect to the serial or network port using a terminal or a terminal emulation program on a PC.

Consult “

5: Function Reference” on page 35 for information on the function commands.

3” as the function number

TIME MODE – LOCAL”

DATE-TIME…<mm>/<dd>/<yyyy>”

DATE-TIME” SAVE CHANGES? YES”

YES”, saves the changes, and displays the Status Display

Logging In

Two u ser names are available for logging in to the network po rt’s command line interface: “operator” an d “guest”. The serial port’s command line interface does not require the user to log in.

Operator Login

The Operator has full privileges to change the settings in all the XLi’s functions and to perform firmware updates. As shipped, you can log in as Operator using:

User Name: operator Password: janus

To maintain security, change the Operator password at installatio n. If you are logged in as “operator”, the only command line interface function you cannot perform is changing the Guest password.

Guest Login

Use the guest login to view function settings. As shipped, you can log in as guest using:

User Name: guest Password: ttm

To maintain security, change the Guest password at installation. If you try to use a function that is not accessible from the guest login, you will see a message such as “Access denied” or “Command canceled”.

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Logging Out

You can log out using any of the following commands:

logout

logoff exit quit

Changing Username and Password

To change the user name and password, use the following commands:

• “

F100 P – Change User Password” on page 95

• “F100 PN – Change User Name” on page 97

To reset a lost or forgotten operator username/password , use F100 P and F100 PN comma nds from the command line interface on the serial port.

Session Timeout and Priority

The XLi’s system firmware closes inactive command line sessions on the network port after 15 minutes. The XLi does not terminate inactive command line sessions on the serial port.

The user can open a network port session and a serial ports session concurrently, provided the other session is inactive

(i.e., not actively performing a function such as F8 - Continuous Time Once-per-

Second). The XLi does not allow two or more concurrent network port sessions.

A network port session can be active while an inactive serial port session is open. However, if the serial port session receives user input at this point, it takes control away from the network port and does not yield control to the network port again. The network port will show a prompt, but won’t accept additional commands after the serial port has taken control. Attempting to close the network port session and open a new one will fail; a network port connection cannot be re-established until the serial port has been closed. The following transcripts shows a ‘contest’ between a serial and a network port session:

Serial port session:

>f100 ic f100 IP:192.168.46.150 SM:255.255.255.0 G:192.168.46. 1

>NOTICE: A NEW TELNET SESSION HAS BEEN STARTED ON THE INTERNET POR T!

>f100 ic NOTICE: THERE IS ALREADY A TELNET SESSION ON THE INTE RNET PORT! NOTICE: YOU HAVE TAKEN CONTROL AWAY FROM THE TELNET S ESSION! f100 IP:192.168.46.150 SM:255.255.255.0 G:192.168.46. 1

>f100 ic f100 IP:192.168.46.150 SM:255.255.255.0 G:192.168.46. 1 >

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Network port session:

>f100 ic f100 IP:192.168.46.150 SM:255.255.255.0 G:192.168.46. 1

>NOTICE: UTILITY MONITOR SESSION HAS TAKEN PRIORITY F ROM THIS TELNE T SESSION!

>f100 ic NOTICE: CANNOT RESPOND TO COMMAND BECAUSE UTILITY POR T SESSION HAS PRIORITY!

Web Interface

The web interface makes most of the XLi’s functions conveniently accessible using a browser.

Figure 5. The web interface showing the XLi Admin Homepage

User Privileges

Administrative users can view status information and change the XLi’ s configuration. Non-administrative users can view status information, but cannot change the XLi’s configuration.

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The web interface manages this distinction by providing two sets of web pages. Pages available from the XLi Admin Homepage display status information and let the user change the XLi’s configuration settings. Pages available from the XLi User Homepage only display status information.

Administrative users (e.g., operator1) have access to both the XLi Admin Homepage and the XLi User

Homepage sets of pages. Non-administrative users (e.g., user1) only have access to the XLi User Homepage set of pages.

Sessions

Only one user can be logged into the web interface at a time. The web interface does not support concurrent web sessions. If a second user tries to log in, the browser displays a "503 Web Page Server Busy" message.

The XLi supports concurrent user sessions on the web and command line interfaces (on the network or serial port). However, Symmetricom recommends avoiding concurrent administrative user sessions.

The XLi’s web server automatically closes inactive web sessions after 30 minutes of inactivity.

User Names and Passwords

The ten administrative user names, “operator1” through “operator10”, have “zeus” as the factory set password.

The ten non-administrative user names, “user1” through “user10”, have “ttm” as the factory set password.

Only administrative users can change the user names and passwords. User names and p asswords must have 1 to 15 characters, and are limited to upper/lower case alphanumeric and underscore (“_”) characters. No “special” characters.

Logging In

To log in, enter the IP address of the XLi’s “NET” network port into the web browser’s address field. At the XLi Home Page, click the Login button. Enter the appro priate user name and p assword and click the Login button with your mouse. The browser displays the XLi Admin Homepage or XLi User Homepage.

Navigating

Several notes about using the web interface:

• The home page presents an image of the XLi’ s front p anel to assist with ident ification, should the user need to find it on a rack.

• The images of the 1U chassis show the position of the options bays as seen from t he rear of the unit.

The links on the left navigation bar provide access to three different aspects of the XLi:

• General - the general status and configuration of the XLi system (e.g., user accounts, clock

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settings, alarms, and SNMP).

• System I/O - the status and configuration of the input and output connectors on the rear of the main CPU card (e.g., communication settings, code out, J1, J2, and J3).

• Subsystem - configuration of the option cards located in the option bays

Under Subsystem, the XLi names CPU-aware option cards to the right of the option bay where they are located. Non-CPU aware cards can be present and fully operational in an option bay, but are not shown in the web interface. For more information, see F118 – Option Board Configuration

Only option bays with CPU-aware option cards will have active links. Clicking the link of an unpopulated or non-existent option bay simply refreshes the web page.

When clicking on links, allow each page to load before clicking another link. Clicking links too quickly may cause the Login page to appear.

(page 108).

Submitting Changes

When submitting changes, only click the Submit Changes button once. Wait for the web page to load before navigating away from the page or submitting another change.

Logging Out

To log out, click the Logout button located in the upper left corner of the page. If the user closes the browser without logging out, a new session will not be available until the XLi closes

the inactive session after 30 minutes.

Notes

Notes for specific pages in the web interface:

• Units equipped with the GPS C/A Receiver (87-8028-2): When the user changes the M12 GPS Mode setting and applies the changes, the GPS C/A Receiver goes through several states before attaining the user-specified mode.

• Change Login Page: To change the Operator name, but not the password, leave the password field blank and submit the change.

• The NTP option, though mentioned in the Web Interface, is currently unavailable for the st andard XLi IEEE 1588 clock.

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5: Function Reference

Function Summary

The following summary lists all the XLi functions, identifies the user interfaces from which each one is available, and provides a brief description of the function.

Available from: K = keypad, N = Network Port (Telnet), S = Serial Port, W = Web

Function

F1 – Time Zone Offset F2 – 12/24 Hour Format

F3 – Time & Date

F4 – Serial Port Configuration F5 – Time-Quality Setup F6 – Keypad Lock

F8 - Continuous Time Once-perSecond

F9 - Time On Request F11 - Time Output Format F13 – Time Error F18 – Software Version Request

Available From

K,N,S,W Set the time offset for Standard and Local time K,N,S,W Apply a 12 or 24-hour format to the Front Panel Display, to

K,N,S,W Set the time and date (when not already provided by a

K,N,W Configure the main serial port settings K,N,S,W Set the thresholds for each of the four time quality flags K*,N,S Lock keypad access to the XLi’s functions. (When locked,

N,S Output the time once -per-second (to the command line)

N,S Output the time when triggere d (to the command line) N,S Change the format of the time output by F8 and F9 K,N,S,W View the current estimated worst case time error K,N,S,W View the XLi’s software version information

Description

F8, F9, and F90.

reference source)

F6 is the only function available from the keypad.)

F27 – FTM III Configuration

F42 – Multicode Output Configuration K,N,S,W Not supported.

F44 – N.8 Frequency Synthesizer F50 – GPS Receiver LLA/XYZ Position

F51 – GPS Antenna Cable Delay

F52 – Distribution Cable Delay

F53 – GPS Operation Mode

F60 – GPS Receiver Satellite List

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K,N,S,W Not supported.

K,N,S,W Not supported. K,N,S,W View the Latitude/Longitude/Altitude or geocentric X/Y/Z

coordinates of one or more GPS antennas.

K,N,S,W Compensate for the delay caused by the length of the GPS

antenna cable. (Use F52 to adjust timing

K,N,S,W Compensate for the length of the distribution cable on J2. K,N,S,W Operate specific GPS receivers in Time Mode for static

applications, or in Dynamic Mode for mobile applications.

K,N,S,W View a list of current and tracked satellites.

outputs.)

SSSSSSSSSSSS SSSSSSSSSS SSSSSSS S SSS S SSSSS S

F66 – Daylight Saving Time (DST) Mode

F69 – Time Mode

F71 – Oscillator Statistics

F72 – Fault Status F73 – Alarm Control / Status

F74 – Clock Source Control F90 – Code Output Configuration F100 – Network Port Configuration &

XLi Firmware F100 EA – Ethernet Address F100 IP – IP Address F100 SM – Subnet Mask

K,N,S,W Schedule when DST starts and ends (Local time only)

K,N,S,W Set the time scale (T AI, GPS, UTC, S t andard, Local) output

by the IEEE 1588 card and displayed on the front panel of the XLi. (TAI is the recommended setting).

K,N,S,W Display the XLi oscillator’s phase, offset, drift, and DAC

values

K,N,S,W View clock and power supply faul t status K,N,S,W View the status of all the alarm indicators. Enable/disable

alarms for each indicator. Set alarm thresholds. Enable or

disable LED blink K,N,S,W Select the pattern of switching between reference sources K,N,S,W Configure settings for CODE – time code output

K,N,S,W Configure the standard network port se ttings

K,N,S,W Display the Ethernet (MAC) address K,N,S,W Configure the IP address K,N,S,W Configure the subnet mask

F100 G – Gateway F100 IC – Network Port Settings F100 L/LOCK/UNLOCK – Remote

Lockout F100 L – Remote Lockout

F100 ST – Self Test Status

F100 BH – Burn Host

F100 BUB – Burn BootLoader

F100 BU – Burn

F100 BF – Burn File System

F100 BUFP – Burn FPGA Firmware

F100 CONFIG – Configure NTP & SNMP

K,N,S,W Configure the default gateway K,N,S,W Display all the standard network port’s settings K,N,S Lock remote access to the XLi’s standard network port

K,N*,S Display the status of F100 LOCK

*Locked through the network port, serial port, and keypad.

Can be unlocked only through the keypad or serial port. K,N,S Display the XLi’s self test results for Flash CRC, RAM,

Serial Port, and NVRAM N,S Upgrading system firmware: select the FTP host, path, and

filename of the system firmware N,S Upgrading system firm wa re : ‘bur n’ the boo tloader file (* .b t)

selected using F100 BH to flash memory N,S Upgrading system firmware: ‘b urn’ the system fir mware file

(*.bin) selected using F100 BH to flash memory N,S Upgrading system firmware: ‘burn’ the file system file (*.fs)

selected using F100 BH to flash memory N,S Upgrading system firmware: burn the FPGA program file

(*.bin) selected using F100 BH to the flash memory

N,S,W*

Transfer the SNMP configuration file between the XLi and

an FTP server for editing

F100 J – Factory Mode Jumper

36 XLi IEEE 1588 Clock

N,S View the status of the factory mode jumper, which is used

by factory technicians. Not of interest to most end users.

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SSSSSSSSSSSS SSSSSSSSSS SSSSSSS S SSS S SSSSS S

F100 K I L L – Reboot F100 P – Change User Password F100 PI – PING F100 PN – Change User Name F108 – Oscillator Configuration F110 – J1 Input (TIET)

F111 – J2 Output (Rate) F113 – J3 Input Configuration (Aux

Ref) F116 – Display Brightness Level F117 – Factory Configuration

F118 – Option Board Configuration

F119 – GPS Receiver Configuration

F120 - N.1 Frequency Synthesizer

N,S Reboot the XLi N,S,W Change the XLi password N,S Ping from the XLi to another host on the network N,S,W Change the User Name K,N,S,W View the oscillator type K,N,S,W Configure the J1 input connector. IRIG Time Code not

supported.

K,N,S,W Configure the J2 output connector. PPO not supported. K,N,S,W Configure the J3 input connector. Freq Meas not

supported.

K Set the brightness of the display on the XLi’s front panel K,N,S,W View some of the factory settings such as the serial

number

K,N,S,W View the contents of each option bay. Only recognizes

certain cards K,N,S,W Configure and display status for GPS Receivers K,N,S,W Not supported.

F123 – Have Quick Input/1 PPS Sync Configuration

F126 – Options Key Entry

F128 - Have Quick Output

a.The web interface makes it convenient to edit the SNMP configuration files directly in the browser. Symmetricom recommends this approach versus the more complicated approach of transferring configuration files to an FTP server.

K,N,S,W Not supported.

K,N,S Enable an XLi option by entering a software key K,N,S,W Not supported.

Please note that the functions marked “Not Supported” are associated with options that are unavailable for the XLi IEEE 1588 clock. While those functions remain in the user interfaces, many references to them have

been removed from this manual to avoid confusion. For additional information on these functions, consult the User Guide for the standard XLi Time and Frequency System, available from the XLi Product Information CD-ROM and from http://www.symmetricom.com/media/pdf/manuals/man-xli.pdf

XLi IEEE 1588 Clock 37 997-01510-03, Rev. C, 12/12/2006

SSSSSSSSSSSS SSSSSSSSSS SSSSSSS S SSS S SSSSS S

F1 – Time Zone Offset

Use function F1 to display and set the time zone of fset betwee n your Standard T ime zone and Unive rsal Time Coordinated (UTC). Refer to “

St andard T ime and Local Time used by F69. For an expanded explanation of Local, S ta ndard, UTC, T AI, and GPS time, see “

F69 – Time Mode” on page 65.

For example, to set the time zone for Pacific Standard Time (UTC –8 hours), set the value in F1 to – 08:00. Exclude the 1-hour Daylight Saving T ime (DST) offse t from this value . DST is handled sep arately by “

F66 – Daylight Saving Time (DST) Mode” on page 63.

Because the front panel display and Multicode Output card can be configured to display/distribute Local or Standard time, we recommended configuring F1 as described in the “

page 15.

The factory setting for F1 is UTC –8:00 hours (Pacific Standard Time). Related topics:

• “

F2 – 12/24 Hour Format” on page 39

• “F11 - Time Output Format” on page 50

• “F27 – FTM III Configuration” on page 53

F: World Map of Time Zones:” on page 193. F1 is the basis for

3: Installation and Set-up” on

Command Line

To display the time zone offset, enter “F1<CR>” on the command line. The XLi responds with the following character string:

F1<S><SIGN><HH>:<MM><CR><LF>

where:

F 01 = function number <S> = ASCII space character (one or more) <SIGN> = either no character or + for positive offsets or – for negative offsets <HH> = one – or two-digit hours offset from 00 to12 hours : = ASCII character for a colon <MM> = two-digit minutes offset <CR> = carriage return character <LF> = line feed character

= ASCII character F

For example, to set the time zone offset, enter:

F1 –8:00<CR>

38 XLi IEEE 1588 Clock

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SSSSSSSSSSSS SSSSSSSSSS SSSSSSS S SSS S SSSSS S

XLi responds:

OK<CR><LF>

To verify the change, enter:

F1<CR>

XLi Responds:

F1 –8:00<CR><LF>

F2 – 12/24 Hour Format

Use function F2 to make 12 or 24-hour time notation available from:

• Keypad/Display Interface

• F8 - Continuous Time Once-per-Second (page 46)

• F9 - Time On Request (page 49)

And separately from:

• CODE – Time Code Output F2 does not affect the output of the IEEE 1588 card. The factory settings for F2 are 24-hour format for the display and 24-hour format for IRIG (F90) The user can apply F2 regardless of the time scale selected using F69 (Local, Standard, TAI, GPS,

UTC).

(page 25)

(page 13)

Typically, 12 hour notation only applied to Standard and Local time. Symmetricom strongly recommends using 24 notation when F69 is set to TAI, GPS, and UTC. Applying 12 hour notation to those time scales is non-standard and causes ambiguous representation of time. For example, if 12 hour notation is applied to TAI, the front panel displays “249:10:21:34” once in the morning, and once at night.

Note: Symmetricom strongly recommends using only 24 hour notation for the XLi IEEE 1588 Clock.

The 12-hour notation counts hours from 1 to 12 twice per da y, like a conventional wall clock. The 24-hour notation counts hours from 0 to 23 once per day. For example, in the 24 hour notation, 18:00 is equivalent to 06:00 in the 12-hour notation (i.e., 18:00 – 12 hours = 06:00).

Command Line

To display the current hour format, send:

F2<CR>

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SSSSSSSSSSSS SSSSSSSSSS SSSSSSS S SSS S SSSSS S

The XLi responds:

F2<S>D<HH><SEP>I<HH><CR><LF>

where:

F = ASCII character F. 02 = Function number. <S> = ASCII space character (one or more). D = ASCII character for Display format. <HH> = 12 or 24. I = ASCII character for IRIG format <CR> = Carriage return character. <LF> = Line feed character.

For example, to display the current hour format, send:

F2<CR>

The XLi responds:

F2 D24 I24<CR><LF>

To set the hour format, send:

F2 D12 I24<CR>

XLi responds:

OK<CR><LF>

F3 – Time & Date

Use function F3 to set the XLi system clock’s time and date. If the XLi is using GPS as its primary reference source, setting F3 manually is unnecessary. Following startup, the XLi synchronizes its time

and date to the GPS reference source F3 to set the time for the IEEE 1588 option card.

. If the XLi doesn’t have GPS as its primary reference source, use

F3 prompts the user for the Time Mode, the Date in mm/dd/yyyy format, and the Time in hh:mm:ss format. The hours in hh:mm:ss should be given using 24-hour notation (e.g., 6 pm = 18:00).

1. Normally, with the factory configured settings and a good GPS antenna placement.

40 XLi IEEE 1588 Clock

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SSSSSSSSSSSS SSSSSSSSSS SSSSSSS S SSS S SSSSS S

TIME MODE selects which time scale (TAI, Local, Standard, GPS, UTC) is being entered by the user. The XLi, translates the user entry into its equivalents in other time scales. For example, if Local time is 5 hours relative to UTC, entering LOCAL - 07/14/2006 - 10:47:10 in F3 shows up on the front keypad display as UTC 198:15:47:10.

TIME MODE in F3 defines only the entry of time output by the XLi. F3’s Time Mode should not be confused with F69 (see “

page 65). F69 controls the time scale displayed/output on the front panel display, F8 - Continuous Time Once-per-Second, F9 - Time On Request, and F90 – Code Output Configuration.

Notes:

• Avoid saving/applying new F3 settings while the XLi is locked to a reference source and

distributing time information. Doing so allows the XLi to distribute the potentially incorrect time set by F3 for up to 8 seconds until the XLi re-synchronizes to the (GPS) reference source. If the user applies new F3 settings while the XLi is locked to the reference source, the XLi switches to the F3 time and then back to GPS reference without generating an alarm. With IEEE 1588 packets, for example, this means that the incorrect time would be distributed for a sh ort period of time until the XLi resynchronized with the GPS reference source.

in F3; it does not control the time scale displayed or

F69 – Time Mode” on

Command Line

To display the time and date, send:

F3<CR>

XLi responds:

F3<S><MM>/<DD>/<YYYY><SEP><hh>:<mm>:<ss><CR><LF>

where:

F3 = ASCII string for function F3. <S> = ASCII space character (one or more). <TIME MODE> = the time mode the entered time refers to; LOCAL, STANDARD, GPS,

UTC, and TAI

<SEP> = one or more separator characters: either space, comma or tab <MM> = two-digit month <DD> = two-digit day of month <YYYY> = four-digit year / = ASCII character for slash delimiter : = ASCII character for a colon delimiter. <hh> = one- or two-digit hours. <mm> = two-digit minutes.

XLi IEEE 1588 Clock 41 997-01510-03, Rev. C, 12/12/2006

SSSSSSSSSSSS SSSSSSSSSS SSSSSSS S SSS S SSSSS S

<ss> <CR> = carriage return character. <LF> = line feed character.

= two-digit seconds.

For example, to display the date and time, send:

F3<CR>

XLi responds:

F3 UTC 01/01/2002 00:05:34<CR><LF>

To set the time and date, send:

F3 UTC 07/14/2002 18:20:30<CR>

Only valid times and dates are accepted. The XLi responds:

OK<CR><LF>

F4 – Serial Port Configuration

Use function F4 to change or display the serial port settings. The factory settings are:

• Interface – RS-232

• Baud rate – 9600

• Data bits – 8

• Parity – NONE (only available/valid when Data Bits is set to 8)

• Stop bits – 1

Command Line

To display the Serial Port settings, send:

F4<CR>

XLi responds:

F4<S><RS><SEP><BR><SEP><DB><SEP><P><SEP><SB><CR><LF>

42 XLi IEEE 1588 Clock

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SSSSSSSSSSSS SSSSSSSSSS SSSSSSS S SSS S SSSSS S

where:

F = ASCII character F. 04 = function number. <S> = ASCII space character (one or more). <SEP> = One or more separator characters: either space, comma or tab. <RS> = Interface type, RS-232 or RS-422 <BR> = Baud Rate, with possible values 1200, 2400, 4800, 9600, or 19200 <DB> = Data Bits, with possible values 7 or 8 <P> = Parity, with possible values “even” or “odd” or “none” <SB> = Stop Bits, with possible values 1 or 2. <CR> = Carriage return character. <LF> = Line feed character.

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

For example, to display the serial port settings, send:

F4<CR>

The XLi responds:

F4 232 9600 8 none 1<CR><LF>

To set the serial port settings, send:

F4 422 9600 7 even 1<CR>

XLi responds:

OK<CR><LF>

F5 – Time-Quality Setup

Use function F5 to enable/disable time quality reporting, and to set the thre sholds of the four time-quality flags.

How time quality reporting works in the XLi: When a reference source becomes unavailable, the XLi uses its own oscillator to keep track of time. Without the reference source, the XLi can no longer adjust, or steer, the oscillator to remain synchronized with the reference source. The rate at which the oscillator counts time is slightly faster or slower than the reference source. The resulting difference, time error, accumulates over time.

XLi IEEE 1588 Clock 43 997-01510-03, Rev. C, 12/12/2006

SSSSSSSSSSSS SSSSSSSSSS SSSSSSS S SSS S SSSSS S

The XLi estimates the time error based on the oscillator-type and on the degree of ste ering (DAC value) applied to the oscillator before the reference source became unavailable. As time error grows and exceeds the thresholds of each time-quality flag, the XLi generates a different time-quality indicator. The time-quality indicator is represented as a time quality character in the following text-based time outputs:

• “

F8 - Continuous Time Once-per-Second” on page 46

• “F9 - Time On Request” on page 49

In addition, a time quality indicator is encoded in IRIG-B time code generated by the following functions:

F90 – Code Output Configuration” on page 78

• “ For more information on time quality indicators, see “IRIG Standard Format A” on page 192. The XLi accepts threshold values from 200 ns to 40000000000 ns. The factory settings for F5 are as follows:

• Time quality reporting - enabled

• First time quality flag 150 ns

• Second time quality flag 15,000 ns

• Third time quality flag 1,000,000 ns

• Fourth time quality flag 150,000,000 ns The IEEE 1588 stratum of the PTP master is determined from the following relational t able based on the

XLi time quality flag settings:

• Stratum 1: 150 ns or better (GPS equivalent performance)

• Stratum 2: From 150 ns to better than 15,000 ns

• Stratum 4: From 15,00ns to better than 150,000,000 ns Related topics (Time Error):

• “

F13 – Time Error” on page 52 displays the current time error

• “

F71 – Oscillator Statistics” on page 67 provides the DAC value

Command Line

To determine if the time quality characters are enabled and what the thresholds are, enter:

F5<CR>

XLi responds The XLi responds:

F5<S><STATE><SEP><FLAG><SEP><FLAG><SEP><FLAG><SEP><FL AG><CR><LF>

44 XLi IEEE 1588 Clock

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SSSSSSSSSSSS SSSSSSSSSS SSSSSSS S SSS S SSSSS S

where:

F 05 = function number <S> = ASCII space character (one or more) <SEP> = one or more separator characters; either space, comma or tab <STATE> = ENABLE or DISABLE <FLAG> = one error threshold in nanoseconds, 1 to 11 digits with or without leading zeros <CR> = carriage return character <LF> = line feed character

For example, to display the time quality status and flags, enter:

F5<CR>

= ASCII character F

XLi responds:

F5 DISABLE 00000001000 00000010000 00000100000 000010 00000<CR><LF>

To enable time quality reporting, and change the thresholds of the time quality flags, enter:

F5 ENABLE 2000 20000 200000 2000000<CR>

XLi responds:

OK<CR><LF>

Note: Leading zeros aren’t required for to enter new settings, but are included in readouts of the set-

tings.

F6 – Keypad Lock

F6 – Keypad Lock enables or disables the keypad, preventing accidental changes to the XLi’s settings. When enabled, the display responds ‘KEYPAD LOCKOUT BY FUNC 6’ when the user attempts to access any function other than F6 setting for F6 – Keypad Lock is disabled.

Command Line

To display the Keypad Lock status, send:

. F6 remains available through the keypad at all times. The factory

F6<CR>

XLi IEEE 1588 Clock 45 997-01510-03, Rev. C, 12/12/2006

SSSSSSSSSSSS SSSSSSSSSS SSSSSSS S SSS S SSSSS S

XLi responds:

F6<S><STATE><CR><LF>

where:

F = ASCII character F 6 = function number <S> = ASCII space character (one or more) <STATE> = ENABLE or DISABLE <CR> = carriage return character <LF> = line feed character

For example, to display the Keypad Lock status, send:

F6<CR>

XLi responds:

F6 DISABLE<CR><LF>

To enable Keypad Lock, send the following string:

F6 ENABLE<CR>

XLi responds:

OK<CR><LF>

To disable Keypad Lock, send the following string:

F6 DISABLE<CR>

XLi responds:

OK<CR><LF>

F8 - Continuous Time Once-per-Second

The function F8 commands and outputs are available only on the command line interface (through the serial and network ports). They are not available through the keypad display or web interfaces.

Function F8 outputs the time-of-year once per second, condition ally followed by a time quality character. F8 is affected by the following functions:

• F2 – 12/24 Hour Format (page 39)

46 XLi IEEE 1588 Clock

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SSSSSSSSSSSS SSSSSSSSSS SSSSSSS S SSS S SSSSS S

• F5 – Time-Quality Setup (page 43)

• F11 - Time Output Format (page 50)

• F69 – Time Mode (page 65)

The Format of the F8 Output String

The factory setting for the output string format is as follows:

where:

<SOH> = ASCII Start-of-Heading character <CR> = ASCII Carriage Return character <LF> = ASCII Line Feed character DDD = day-of-year. HH = hours. MM = minutes. SS = seconds. mmm = milliseconds. : = colon separator. Q = time quality character (see the following table)

The time quality character, "Q", is one of the following characters:

SPACE = Time error is less than time quality flag 1's threshold . = Time error has exceeded time quality flag 1's threshold * = Time error has exceeded time quality flag 2's threshold

# = Time error has exceeded time quality flag 3's threshold ? = Time error has exceeded time quality flag 4's threshold

or a reference source is unavailable

The time quality characters can not be modified. Use F11 - Time Output Format Use F5 – Time-Quality Setup

XLi IEEE 1588 Clock 47 997-01510-03, Rev. C, 12/12/2006

(page 50) to change the format of the F8 output string.

(page 43) to set the four time quality thresholds.

SSSSSSSSSSSS SSSSSSSSSS SSSSSSS S SSS S SSSSS S

While Synchronizing to a Reference Source

Following startup, the user should avoid using F8 outputs until the XLi has acquired and locked to a timing reference source such as GPS PRI (when F131 is set to PTP MASTER) or the IEEE 1588 card (when F131 is set to PTP SLAVE PRIMARY).

F8’s output appears similar to the following example while the XLi locks and synchronizes to a reference:

001:00:13:45* 001:00:13:46? ... 001:00:14:05? 001:00:13:44 001:00:13:59 ... 001:00:14:05 322:17:59:34 322:17:59:35

When the time quality characters clear, and the time-of-year synchronizes to the reference source time, the F8 output string should be considered accurate and reliable.

After Loosing a Reference Source

If the system clock comes unlocked from the reference source (no reference sources available), F8 continues generating time-of-year information based on the synchronized time. Gradually, as the estimated worst case time error (“F13 – Time Error”, page 52) accumulates and exceeds each time quality threshold (“F5 – Time-Quality Setup”, page 43), F8 appends the appropriate time quality character to the time-of-year string. This progression appears similar to the following example:

322:18:02:31 322:18:02:32. 322:18:02:33* 322:18:02:34*

Command Line

For example, to initiate Continuous Time once-per-second, enter:

F8<CR>

The XLi replies:

199:11:19:30<CR><LF> 199:11:19:31<CR><LF> 199:11:19:32<CR><LF>

To stop F8 Continuous Time Once-Per-Second, press Ctrl-C on your keyboard.

48 XLi IEEE 1588 Clock

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SSSSSSSSSSSS SSSSSSSSSS SSSSSSS S SSS S SSSSS S

F9 - Time On Request

This function is available through the command line interface only. It is not available from the keypad. Use function F9 to record the exact time the XLi receives a request from the user. Enter the command "F9<CR>" to prepare the XLi for the user's request. At the desired moment, send

the request to the XLi by entering an upper case "T". The XLi saves the current time-of-day, accurate to within 1μS, to a buffer, and then outputs it to the command line interface. The XLi continues to provide the time-of-day each time it receives a "T" until F9 is cancelled. To cancel F9, enter Ctrl-C on your keyboard. The command line disregards all input other than SHIFT-T and Ctrl-C.

The time-of-day output is only available on the network or serial port used to give the F9 command. F9’s factory set output string is as follows:

where:

<SOH> = ASCII Start-of-Heading character <CR> = ASCII Carriage Return character <LF> = ASCII Line Feed character YYYY = year DDD = day-of-year. HH = hours. MM = minutes. SS = seconds. mmm = milliseconds. : = colon separator. Q = time quality character (see the following table)

The time quality character, "Q", is one of the following characters:

SPACE = Time error is less than time quality flag 1's threshold

. = Time error has exceeded time quality flag 1's threshold * = Time error has exceeded time quality flag 2's threshold # = Time error has exceeded time quality flag 3's threshold ? = Time error has exceeded time quality flag 4's threshold, or a reference source is unavailable

For example, to prepare Time on Request, enter:

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SSSSSSSSSSSS SSSSSSSSSS SSSSSSS S SSS S SSSSS S

F9<CR>

Then, to request the current time, enter SHIFT -T on your keyboard. ("T" does not appea r). XLi responds:

To exit F9 press Ctrl-C on your keyboard.

F11 - Time Output Format

Use function F11 to change the format of the F8 and F9 time output strings. The factory setting for F11 format is null, which reinstates the factory default time output formats for F8 and F9:

<SOH>DDD:HH:MM:SSQ<CR><LF> (for F8) <SOH>DDD:HH:MM:SS.mmmQ<CR><LF> (for F9)

To display the default format for F11, enter:

F11

F11 responds:

F11 DDD:HH:MM:SS.mmmQ

where:

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SSSSSSSSSSSS SSSSSSSSSS SSSSSSS S SSS S SSSSS S

The time quality character, "Q", is one of the following characters:

SPACE = Time error is less than time quality flag 1's threshold . = Time error has exceeded time quality flag 1's threshold * = Time error has exceeded time quality flag 2's threshold # = Time error has exceeded time quality flag 3's threshold ? = Time error has exceeded time quality flag 4's threshold, or a reference source is unavailable

Note: F8 does not display milliseconds, regardless of the format defined in F11.

Suppress the “DDD”, “HH”, “MM”, “SS”, “mmm”, and “Q” segments of F11 by placing an “X” (Shift-X) in the leading position of any segment, followed by any placeholder characters, and the following separator. For example, to suppress “DDD”, enter:

F11 X--:

To see the resulting change to F11, enter:

F11

F11, with “DDD” suppressed, responds:

F11 XDD:HH:MM:SS.mmmQ

With “DDD” suppressed, the output of F8 would look like this example:

:16:23:32

Ending a format string early (no “:” or “.” separator at the end) with a carriage return, enables the remaining un-typed characters. This makes it easy to restore the default F11 formatting.

To return F11 to its default format, enter:

F11 D

To display the restored defaults, enter “F11” again. F11 responds:

F11 DDD:HH:MM:SS.mmmQ

The “DDD”, “HH”, “MM”, “SS”, “mmm”, and “Q” segments can not be replaced with characters, they can only be suppressed.

The “:” and “.” separators can be replaced with ASCII characters or suppressed using “X”. For example, to replace the separators with characters, enter:

F11 ---D--H--M--S

When you check the results by entering “F11”, F11 responds:

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SSSSSSSSSSSS SSSSSSSSSS SSSSSSS S SSS S SSSSS S

F11 DDDDHHHMMMSSSmmmQ

With the new formatting, F8 displays:

128D16H41M27*

And F9 displays:

365D16H45M22S680*

F13 – Time Error

Use function F13 to request the estimated worst-case time error due to oscillator drift during periods of unlock from a reference source. See “System Time & Frequency Accuracy” on page 10 for more information on time error for different reference sources. Time error begins to accumulate when the receiver loses lock to a reference source. The XLi calculates the worst-case time error based on the stability of system clock’s oscillator type, and the time elapsed since loss of lock.

Command Line

The Command line interface will report time error when it receives the following string:

F13<CR>

The XLi responds:

F13<S><ERROR><CR><LF>

where:

F13 <S> = ASCII space character <ERROR> = calculated worst-case erro r in seconds <CR> = carriage return character <LF> = line feed

= ASCII string for function F13

For example, to display the time error, enter:

F13<CR>

XLi responds (example):

F13 TIME ERROR -0.002932863<CR><LF>

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SSSSSSSSSSSS SSSSSSSSSS SSSSSSS S SSS S SSSSS S

F18 – Software Version Request

Use function F18 to display the current firmware version numbers of the firmware in the XLi:

• Bootloader

• Software (firmware)

• File System

•Project Rev #

•FPGA

Command Line

Use Command Line Function F18 to obtain the system’s firmware version information.For example, enter:

F18<CR>

The XLi responds:

F18 BOOTLOADER 192-8000 SOFTWARE 192-8001 FILE SYSTEM 192-8002v1.80 PROJ REV # 1.80 FPGA # 184-8000V50

F27 – FTM III Configuration

Note: The FTM III card is currently unavailable as an option for the standard XLi IEEE 1588 clock.

F42 – Multicode Output Configuration

Note: The Multicode card is currently unavailable as an option for the standard XLi IEEE 1588 clock.

F44 – N.8 Frequency Synthesizer

Note: The N.8 card is currently unavailable as an option for the standard XLi IEEE 1588 clock.

F50 – GPS Receiver LLA/XYZ Position

Use function F50 to display the current GPS position. Specifically, Use function F50 to:

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SSSSSSSSSSSS SSSSSSSSSS SSSSSSS S SSS S SSSSS S

• Display the option bay location of the GPS receiver(s). If multiple GPS receivers are available,

use the UP/DOWN ARROW keys to select a receiver.

• Select the positional coordinate system, Latitude Longitude Altitude (LLA) or XYZ (Earth-

Centered, Earth-Fixed XYZ coordinates).

• If LLA is selected, Altitude Mode shows the elevation in given meters.

Command Line

Use the following format to display the current settings display the current position for the GPS receiver in LLA coordinates:

F50<S>B<N><SEP>LLA<CR>

XLi responds with the coordinate information in the following format:

F50<S>B<N><SIGN><S><DEG>d<MIN>'<SEC>"<S><SIGN><S><DEG >d<MIN>'<SEC> "<S><ALT><UNITS><CR ><LF>

where:

F50 <S> = ASCII space character one or more. B = ASCII letter to denote Option Bay number follows <N> = Option Bay Number, 1 through 4. <SEP> = Separator LLA = LLA mode <CR> = carriage return character. <SIGN> = N or S for latitude; E or W for longitude; – for negative altitude and <S> or + for positive altitude. <DEG> = two-digit degrees for latitude or three-digit degrees for longitude. d = ASCII character d <MIN> = two-digit minutes. ' = ASCII character ' <SEC> = two-digit seconds + 1 digit 10ths of seconds. " = ASCII character " <ALT> = altitude in meters <UNITS> = unit of altitude, “m” fo r me te rs <LF> = line feed character.

= Function 50

For example, to display the LLA coordinates of the antenna connected to card #2, enter:

F50 B1 LLA<CR>

54 XLi IEEE 1588 Clock

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SSSSSSSSSSSS SSSSSSSSSS SSSSSSS S SSS S SSSSS S

XLi responds:

F50 B1 N 38d23'51.3" W 122d42'53.2" 58m<CR><LF>

To display the present antenna position using ECEF XYZ coordinates in meters, use the following format:

F50<S>B<N><SEP>XYZ<CR>

XLi responds using the following format:

F50B<N><S><SIGN><S><MX>m<S><SIGN><S><MY>m<S><SIGN><MZ >m<CR><LF>

where:

F = ASCII character F 50 = function number <S> = ASCII space character B = ASCII letter to denote Option Bay number follows <N> = Option Bay Number, 1 through 4. <SIGN> = Either + or - for the position of the ECEF XYZ coordinates <MX> = Antenna X-position in meters to tenths of a meter <MY> = Antenna Y-position in meters to tenths of a meter <MZ> = Antenna Z-position in meters to tenths of a meter m = ASCII character m for Meters <ALT> = altitude in meters <CR> = carriage return character <LF> = line feed character

For example:

F50 B1 XYZ<CR>

XLi responds:

F50 B1 X –4474331m Y 2668899m Z –3668099m<CR><LF>

F51 – GPS Antenna Cable Delay

Use function F51 to display or configure the GPS antenna cable delay. Setting a positive value for F51 compensates for the time the signal takes to travel the length of the cable from the GPS antenna to the receiver. When multiple GPS receivers are installed, a separate value can be set for each unique receiver. The factory setting for F51 is +60 ns, which corresponds to the 50-foot (15.24-meter) long RG-

XLi IEEE 1588 Clock 55 997-01510-03, Rev. C, 12/12/2006

SSSSSSSSSSSS SSSSSSSSSS SSSSSSS S SSS S SSSSS S

59 GPS antenna cable supplied with the XLi. If the GPS antenna is connected using a different antenna length, calculate the new value using the multiple given below and adjust the value of F51. If using an optional Down/Up Converter, consult that product’s documentation for directions on setting the correct cable delay.

F51 Guidelines:

• For RG-59: multiply the cable length by 1.24 ns/ft. to get the value for F51.

• For RG-58: multiply the cable length by 1.4 ns/ft. to get the value for F51.

• Don’t use function F51 to adjust the XLi’s timing outputs; use F52 Distribution Cable Delay

instead.

Command Line

Use the following format to display the current Antenna Cable Delay setting:

F51<S>B<N><CR>

The XLi responds using the following format:

F51<S>B<N><SEP><SIGN><DELAY>ns<CR><LF>

where:

F 51 = the function number. <S> = ASCII space character one or more. B = ASCII letter to denote Option Bay number follows <N> = Option Bay Number of the GPS option card, 1 through 4. <CR> = carriage return character. <SEP> = one or more space characters. <SIGN> = either + or blank <DELAY> = 1 to 6 digit delay from 0 ns to 999999 ns. ns = nanoseconds (ns or NS for input string). <LF> = line feed character.

= ASCII character F (f or F for input string).

For example, to see the antenna cable delay for the GPS card in option bay 4, enter:

F51 B4<CR>

XLi responds:

F51 B4 +000060ns<CR><LF>

56 XLi IEEE 1588 Clock

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SSSSSSSSSSSS SSSSSSSSSS SSSSSSS S SSS S SSSSS S

To set the antenna cable delay for an option card, use the following format:

F51<S>B<N><S><DELAY>NS<CR>

For example, to set the antenna cable delay for the GPS card in option bay 4 to 100 ns, enter:

F51 B4 100NS<CR>

XLi responds:

OK<CR><LF>

F52 – Distribution Cable Delay

Use function F52 to display or set the distribution cable delay for the time code and 1 PPS outputs. F52 compensates for the signal’s travel time from the XLi to its point of use. The distribution cable delay applies uniformly to all output ports. The as-shipped factory setting is +0 ns. The range of possible values is +999,999 ns to –999,999 ns. Positive values advance the timing signals, while negative values retard them.

To calculate what the setting should be, multiply the delay/foot by the length of the cable in feet. The typical delays for the following cable types are:

• RG-58 – approximately 1.4 ns/foot

• RG-59 – approximately 1.24 ns/foot

Command Line

To display the current distribution cable delay, enter:

F52<CR>

The XLi responds using the following format:

F52<SEP><SIGN><DELAY>ns<CR><LF>

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SSSSSSSSSSSS SSSSSSSSSS SSSSSSS S SSS S SSSSS S

where:

F = ASCII character F (f or F for input string). 52 = the function number.

<S> = one or more space characters. <SIGN> = either + or – <D> = 1 to 9 digit delay from +999999 ns to –999999 ns ns = nanoseconds (ns or NS for input string) <CR> = carriage return character <LF> = line feed character

For example, to display the current distribution cable delay, enter:

F52<CR>

XLi responds:

F52 +000000ns<CR><LF>

To set the distribution cable delay to 60 ns, enter:

F52 +000060ns<CR>

XLi responds:

OK<CR><LF>

F53 – GPS Operation Mode

The GPS C/A Receiver (87-8028-2) has two modes:

• Select “Dynamic Mode” if the position of the receiver is subject to frequent change, or if it is in

continuous motion. For example, use Dynamic Mode when the XLi is used in mobile vehicles such as ships, land vehicles, or aircraft. With Dynamic Mode selected, the receiver updates the position information repeatedly to arrive at the best time calculations for a mobile environment.

• Select “Time Mode” if the receiver used in a st atic environment such as a server roo m. With T ime

Mode, the receiver averages the position data over time to determine the antenna position and calculate the time precisely and accurately.

Keypad

While viewing the Status screen on the XLi front panel display, press the following keypad buttons:

ENTER 53 ENTER

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If an GPS C/A Receiver is available, F53 displays:

GPS M12 AVAILABILITY OPTION BAY #

Where # is the option bay number the card is located in. If more than on e GPS C/A Rece ive r is present, use the UP/DOWN ARROW buttons to select the option bay location of a specific card.

To view the mode the GPS C/A Receiver is in, press ENTER again, and F53 displays the current mode:

GPS MODE SELECT AUTO MODE (or DYNAMIC MODE)

To change the mode, use the UP/DOWN ARROW buttons and press ENTER. F53 asks:

SAVE CHANGES? YES

To save changes, press ENTER.

Command Line

To request the GPS operation mode of the GPS C/A Receiver (87-8028-2), enter:

F53 B<N>

F53 responds using the following format:

F53<SP>B<N><SEP><STATUS><CR><LF>

where:

F 53 = the function number. <SP> = ASCII space character one or more. B = ASCII letter to denote Option Bay number follows <N> = Option Bay Number, 1 through 4. <SEP> = one or more space characters. <STATUS> = DYNAMIC MODE or AUTO MODE <CR> = carriage retu rn char a cte r. <LF> = line feed character.

For example, enter:

F53 B1

XLi IEEE 1588 Clock 59 997-01510-03, Rev. C, 12/12/2006

= ASCII character F (f or F for input string).

SSSSSSSSSSSS SSSSSSSSSS SSSSSSS S SSS S SSSSS S

Example response:

F53 B1 AUTO MODE (or DYNAMIC MODE)

To set the GPS Operation Mode, enter a command using the following format:

F53<SP>B<N><SEP><MODE><CR><LF>

where <MODE> equals “DYNAMIC MODE” or “AUTO MODE”. For example, enter:

F53 B1 DYNAMIC MODE

F53 responds:

OK<CR><LF>

F60 – GPS Receiver Satellite List

Use function F60 to display the identification number and signal strength of tracked or current satellites. ‘Tracked’ means a satellite’ s sig nal is being received and interpreted by the receiver (or th at t he XLi has GPS data that suggests this satellite should be visible to the antenna).

GPS satellite are grouped into the following categories:

• Tracked: the XLi is receiving the GPS signal, but isn’t using it to calculate time and position.

• Current: the XLi is using the satellite’s GPS signal to calculate time and position.

• Bad: the GPS satellite is transmitting information that it has been removed from service.

• Rejected: the XLi M12 receiver’s TRAIM feature has detected anomalous signals from this

satellite and has quarantined it from the timing solution for 12 hours.

GPS satellite signal strengths are reported in units of dBW. Signals below -170 dBW (e.g., -171 dBW) are not usable by the GPS receiver. See “

If multiple GPS receivers are installed in the XLi, F60 identifies the GPS receiver by the option bay number in which it is located. For a diagram of option bay numbers, see “

Configuration” on page 108.

If you’re using the keypad/display interface, use the UP/DOWN ARROWs to scroll through the list of satellites.

GPS Signal Strength Requirements” on page 17.

F118 – Option Board

Command Line

Use Serial Function F60 to request a list of all, current, and tracked satellites. To display the list, enter a string using the following format:

60 XLi IEEE 1588 Clock

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SSSSSSSSSSSS SSSSSSSSSS SSSSSSS S SSS S SSSSS S

F60<S>B<N><SEP><TYPE><CR>

XLi responds with approximately 32 lines that use the following format:

F60<S>B<N><S>prn<NN><S><STATE> tracked current<LEVEL><CR><LF>

where:

F60 <S> = ASCII space character one or more. B = ASCII letter to denote Option Bay number follows <N> = Option Bay Number, 1 throug h 4. <SEP> = One or more separator characters; either space, comma or tab. <TYPE> = ALL, CURRENT, or TRACKED. <CR> = Carriage return character. prn = Pseudo Random Number <NN> = 1 through 32 (prn<NN> identifies specific GPS satellites) <STATE> = Good, Bad, or Unknown tracked = Either “tracked” or blank current = Either “current” or blank <LEVEL> = Satellite signal strength in dBW <LF> = Line feed character

= ASCII string indicating function F60.

For example, to display the complete GPS satellite list, enter:

F60 B1 ALL<CR>

XLi responds:

F60 B1 prn1 good current -159dBW F60 B1 prn2 good current -162dBW F60 B1 prn3 good current -163dBW F60 B1 prn4 unknown F60 B1 prn5 unknown F60 B1 prn6 unknown F60 B1 prn7 unknown F60 B1 prn8 good current -161dBW F60 B1 prn9 unknown F60 B1 prn10 unknown F60 B1 prn11 unknown F60 B1 prn12 unknown F60 B1 prn13 good current -159dBW F60 B1 prn14 unknown F60 B1 prn15 unknown F60 B1 prn16 unknown F60 B1 prn17 unknown

XLi IEEE 1588 Clock 61 997-01510-03, Rev. C, 12/12/2006

SSSSSSSSSSSS SSSSSSSSSS SSSSSSS S SSS S SSSSS S

F60 B1 prn18 unknown F60 B1 prn19 unknown F60 B1 prn20 unknown F60 B1 prn21 unknown

F60 B1 prn22 good current -164dBW F60 B1 prn23 unknown F60 B1 prn24 unknown F60 B1 prn25 unknown F60 B1 prn26 unknown F60 B1 prn27 good current -156dBW F60 B1 prn28 unknown F60 B1 prn29 unknown F60 B1 prn30 unknown F60 B1 prn31 unknown F60 B1 prn32 unknown

Similarly, to display a list of the current or tracked satellites, enter:

F60 B1 CURRENT<CR>

F60 B1 TRACKED<CR>

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SSSSSSSSSSSS SSSSSSSSSS SSSSSSS S SSS S SSSSS S

F66 – Daylight Saving Time (DST) Mode

Use function F66 to enable or disable Daylight Saving Time (DST), and to schedule when Local time enters and leaves DST. The factory setting for F66 is Manual (i.e., DST On). The hour for entering/ leaving DST is given in the 24-hour format. Entering/leaving DST can be scheduled for any hour of the day , any day of the year. However , transition s scheduled within 24 hours of the beginn ing/end of the year may not occur at the desired time. This function also works for locations in the southern hemisphere, where DST spans the new year.

Command Line

To display the current status of F66, enter a command using the following format:

F66<CR>

XLi responds using the following format:

F66<S><STATE><ENTER/EXIT><CR>

where:

F 66 = function number <S> = ASCII space character one or more. <STATE> = Off or Manual. <ENTER/EXIT> = If <STATE> is Manual, <ENTER/EXIT> are the dates it enters and exits DST. <CR> = carriage return character. <LF> = line feed character.

= ASCII character F

For example, to disable DST, enter:

F66 Off<CR>

XLi responds:

OK<CR><LF>

To enable DST and set the DST entry and exit times, use the following format:

F66 MANUAL<INHOUR><SEP><INWEEK><SEP><INDAY><SEP><INMO NTH><OUTHOUR> <SEP> <OUTWEEK><SEP><OUTDAY><SEP><OUTMONTH><CR>

XLi IEEE 1588 Clock 63 997-01510-03, Rev. C, 12/12/2006

SSSSSSSSSSSS SSSSSSSSSS SSSSSSS S SSS S SSSSS S

where:

<INHOUR> = time to enter DST in 24-hour format. <SEP> = one or more separator characters, either space comma or tab characters. For output strings

<INWEEK> = which week to enter DST, 1, 2, 3, 4 or 0 (for last). <INDAY> = day of week to enter DST, 1 through 7 where Sunday is 1. <INMONTH> = month to enter DST, 1 through 12 where 1 is January. <OUTHOUR> = hour to exit DST , in 24 hour format. <OUTWEEK> = which week to exit DST, 1, 2, 3, 4 or 0 (for last). <OUTDAY> = day in to exit DS T, 1 through 7 where Sunday is 1. <OUTMONTH> = month to exit DST, 1 through 12 where 1 is January <CR> = carriage return character. <LF> = line feed character.

this will be a single space character.

For example, enter:

F66 MANUAL 02 1 1 04 02 0 1 10

Meaning:

• Manual settings are in effect.

• The entry time is 02 a.m., week 1 (first), day 1 (Sunday), month 4 (April)

• The exit time is 02 a.m., week 0 (last), day 1 (Sunday), month 10 (October). To leave the value of any item unchanged, insert a semicolon in its place. For example, to change the

week DST begins, enter:

F66 MANUAL ; 0 ; ; ; ; ; ;<CR>

XLi responds to all changes with:

OK<CR><LF>

Meaning that Local time will enter DST on the last week of the month. All other parameters remain unchanged.

The XLi automatically reboots when the user changes the DST entry/exit times in F66. If any of the items in an input string are invalid, an error message will be returned.

64 XLi IEEE 1588 Clock

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SSSSSSSSSSSS SSSSSSSSSS SSSSSSS S SSS S SSSSS S

F69 – Time Mode

Use function F69 to select the time mode (time scale) shown or output by:

• The XLi’s front panel display

• The following command line functions (network and serial port):

F8 - Continuous Time Once-per-Second” on page 46

- “

F9 - Time On Request” on page 49

• The CODE output on the Main CPU card. (“F90 – Code Output Configuration” on page 78)

• The PTP packets output by the IEEE 1588 card’s network port (“

Network Config” on page 119)

Select between the following time scales:

• TAI (International Atomic Time) is the basis for UTC and GPS time. TAI is the recommended

time scale for IEEE 1588 standard.

• UTC (Universal Coordinated Time) differs from GPS Time by the addition of leap-second

corrections to compensate for variations in the earth’s rotation.

• Standard T ime is UTC plus a time zone adjustment. For example , Pacific Standard Ti me is UTC

minus 8 hours.

• GPS Time is derived directly from the GPS constellation and doesn’t contain any leap-second

adjustments or other GPS-to-UTC corrections.

• Local Time is UTC plus a time zone and a daylight saving time adjustment.

F131 - Precision Time Protocol

IMPORTANT interactions between F69 and the IEEE1588 card:

• When the IEEE 1588 card is operating as a PTP master, if F69 is set to TAI, Local, or GPS, the

1588 port outputs PTP with TAI time.

• When the IEEE 1588 card is operating as a PTP master, if F69 is set to Standard or UTC, the

1588 port outputs PTP with Standard or UTC time respectively.

• When the IEEE 1588 card is operating as a PTP slave, only TAI and GPS are valid settings for

F69. the reference source so can cause the XLi to output the incorrect time on the display, the CODE output, F8, and F9.

• F69 has no effect on the IEEE 1588 card operating as a PTP slave. The IEEE 1588 card

operating as a PTP slave expects TAI from PTP.

The factory default for the XLi IEEE 1588 clock is TAI.

1. When F69 is configured for Local or GPS time, the display, the CODE output, F8, and F9 all output Local or GPS time respectively. Only the IEEE 1588 card “redefines” Local and GPS from F69 as TAI.

2. The XLi requires the value of the offset between GPS and UTC in seconds to compute Local, Standard, and UTC time. This offset can change by one second, and can potentially be updated at two times during the year. The XLi typically obtains the offset from GPS while GPS is the primary reference source. The value of the offset isn’t available from PTP should slave were the reference source). If a PTP slave is the reference source, a reference source doesn’t obtain the offset from PTP and provide it to the XLi. If the PTP slave and GPS are both reference sources, the value of offset is not reliable because.

XLi IEEE 1588 Clock 65 997-01510-03, Rev. C, 12/12/2006

SSSSSSSSSSSS SSSSSSSSSS SSSSSSS S SSS S SSSSS S

Related functions:

• “

F1 – Time Zone Offset” on page 38

• “F66 – Daylight Saving Time (DST) Mode” on page 63

• “F8 - Continuous Time Once-per-Second” on page 46

• “F9 - Time On Request” on page 49

Command Line

Local Time modifies UTC time to include the Time Zone and Daylight Saving Time adjustments, if enabled by the user.

Use the following format to display the time mode currently used:

F69<CR>

The XLi responds using the following format:

F69<SEP><TT><CR><LF>

where:

F 69 = Function number. <SEP> = One or more separator characters, either space comma or tab characters. For output strings this

<TT> = Time Type. Either GPS, UTC, TAI, LOCAL, or STANDARD. <CR> = Carriage return character. <LF> = Line feed character.

= ASCII character F.

will be a single space character.

For example, enter:

F69<CR>

XLi gives one of the following responses:

F69 GPS <CR><LF> F69 UTC <CR><LF> F69 LOCAL <CR><LF> F69 STANDARD <CR><LF> F69 TAI <CR><LF>

To set the time mode, enter a command using the following format:

F69<S><TT><CR>

66 XLi IEEE 1588 Clock

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SSSSSSSSSSSS SSSSSSSSSS SSSSSSS S SSS S SSSSS S

where:

= ASCII character F.

69 = Function number. <S> = ASCII space character. <TT> = Time Type. Either GPS, UTC, TAI, LOCAL, or

STANDARD.

<CR> = carriage return character. <LF> = line feed character.

For example, to change the time mode to local time, enter:

F69 LOCAL<CR>

Or, to change the time mode to UTC, enter:

F69 UTC<CR>

XLi responds to these changes with:

OK<CR><LF>

F71 – Oscillator Statistics

Use F71 to display the phase, frequency offset, drift rate, and DAC value of an internal or optional external oscillator.

Definitions:

The phase is the instantaneous error in seconds between the oscillator and the control loop zero servo point. The frequency offset is computed using an averaging time that is equal to the effective averaging time of the oscillator controller. The oscillator Drift Rate is computed using a 24-hour average and is the daily Drift Rate of the oscillator. The oscillator DAC value is the signed 16-bit integer that controls the DAC output voltage. It ranges from 0 to 65536.

Command Line

To display the F71 settings, enter:

F71<CR>

XLi responds using the following format:

F71<S>phase=<SIGN><MULT>E<SIGN><EXP><S>s<S><S>offset= <SIGN><MULT>E< SIGN><EXP><S><S>dr ift=<SIGN><MULT>E<SIGN><EXP>/DAY<S><S>DAC=<SIGN><INT> <CR><LF>

XLi IEEE 1588 Clock 67 997-01510-03, Rev. C, 12/12/2006

SSSSSSSSSSSS SSSSSSSSSS SSSSSSS S SSS S SSSSS S

where:

F = ASCII string indicating function F71 <S> = ASCII space character one or more.

<MULT> = multiplier, 4 digits with decimal point. E = ASCII character E for exponent. s = ASCII character s for seconds abbreviation <SIGN> = - for negative or <S> for positive. <EXP> = 2 digit exponent. /DAY = ASCII characters, units of Drift Rate <INT> = integer, 5 digits <CR> = carriage return. <LF> = line feed.

For example, enter:

F71<CR>

XLi responds:

F71 PHASE=-5.678E-09 s OFFSET=-1.986E-07 DRIFT= 6.013 E-08/DAY DAC= 24567<CR><LF>

F72 – Fault Status

Use function F72 to display the fault status of the clock.

• Clock PLL – Locked or unlocked

• Clock Status – Unlocked or locked plus one of the following reference types:

- GPS Primary receiver

- GPS Secondary receiver

- PTP Primary (when configured as a PTP slave)

- PTP Secondary (when configured as a PTP slave)

- (IRIG-A, IRIG-B, NASA 36 not supported)

• Primary power supply – OK or failed

• Secondary power supply – OK or failed

• Rubidium oscillator (if installed) – OK or fault

Command Line

To display the status of the fault detectors, enter:

68 XLi IEEE 1588 Clock

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F72<CR>

The XLi responds:

F72<SP>PLL: <CLK PLL ><SP> CLK: <CLK STATUS><SP><CLK REF:><SP> PWR1:<PWR1 STATUS><SP> PWR2: <PWR2 STATUS><SP>OSC: <OSC STATUS> <CR><LF>

where:

F = ASCII character F 72 = function number <SP> = ASCII space character one or more. <CLK PLL> = Clock Phase Loop Lock status, LOCKED or UNLOCKED <CLK STATUS> = Clock Status, LOCKED or UNLOCKED to the reference source shown. The

LOCKED state is based on the F73 Time Threshold value entered by the operator. F73 Time Threshold sets the threshold in ns above which Time Error triggers an alarm. When the oscillator's predicted worst-case time error ("F13 Time Error" on page 51) exceeds F73 Time Threshold, Time Error enters a fault state and the CLOCK STATUS becomes UNLOCKED. Otherwise the CLOCK STATUS is LOCKED.

<CLK REF> = Clock reference source GPS PRI, GPS SEC, PTP PRI, PTP SEC, (not

supported: IRIG A, IRIG B, NASA 36) AUX REF.

<PWR1 STATUS> = Primary Power Supply status, OK or FAILED <PWR2 STATUS> = Secondary Power Supply status, OK or FAILED <OSC STATUS> = Rubidium oscillator status, OK or F A ILED (if installed) <CR><LF> = o utput line terminator

For example, enter:

F72<CR>

The XLi responds:

F72 CLOCK PLL LOCKED CLOCK STATUS LOCKED GPS PRI PRIMARY POWER SUPPLY OK SECONDARY POWER SUPPLY OK

F73 – Alarm Control / Status

Use function F73 to do the following:

• See the state of an indicator (“Locked/Unlocked” or “OK/Fault”)

• Enable or disable the alarm for each indicator

XLi IEEE 1588 Clock 69 997-01510-03, Rev. C, 12/12/2006

SSSSSSSSSSSS SSSSSSSSSS SSSSSSS S SSS S SSSSS S

• See the state of the Alarm Latch for each indicator

• Clear the Alarm Latch for all indicators

• Enable or disable blinking of the Alarm Status LED on the front panel while it is green or amber

• Set the values for Time Threshold, Timeout Delay, and Power-On Alarm Suppress

The following table summarizes F73’s alarm indicators and parameters, as well as the factory settings for an XLi with one GPS C/A receiver card. The factory settings vary depending on the options included at the XLi at the time it ships from the factory. For example, for an XLi with an GPS receiver, the GPS Primary Receiver indicator setting would be Alarm Enabled.

Update the alarm settings when adding or removing option cards from the XLi.

Indicator/Parameter Name Status Factory Setting

(for XLi without option cards)

Clock Status Locked/Unlocked Always Enabled PLL Locked Locked/Unlocked Alarm Enabled Low Phase Noise (LPN) PLL Locked Locked/Unlocked Alarm Enabled GPS Primary Receiver OK/Fault Alarm Enabled GPS Secondary Receiver OK/Fault Alarm Disabled IRIG Fault OK/Fault Alarm Disabled Aux Ref Fault OK/Fault Alarm Disabled Primary Power OK/Fault Alarm Enabled Secondary Power OK/Fault Alarm Disabled Rubidium oscillator

(XLi w. optional Rubidium oscillator) DAC OK/Fault Alarm Disabled First Time Lock OK/Fault Alarm Enabled Time Error OK/Fault Alarm Enabled Time Threshold (Range 0 to 99,999 ns) 0000 ns Alarm LED Blink n/a Blink Enabled Timeout OK/Fault Alarm Enabled Timeout Delay (Range 0 to 86,400 sec.) 300 sec. Power-On Alarm Suppress (Range 0 to 86,400 sec.) 300 sec. NTP Fault

(XLi w. NTP option)

OK/Fault Alarm Disabled

Clear Alarm Latch Yes/No No

Note: The Rubidium Oscillator and NTP option are currently unavailable for the standard XLi IEEE 1588 clock.

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Alarms - General Information

With Alarm Disabled, an F73 indicator does not trigger and alarm when it enters an Unlocked or Fault state.

With Alarm Enabled, an F73 indicator triggers an alarm when it enters an Unlocked or Fault state, and the following events take place:

• The Alarm Status LED changes color from green to amber or red (See “

page 25.)

• The ALARM output on the rear panel changes from low Z to high Z (impedance).

• If configured, SNMP sends a trap out over the network port. (See “

The following items may delay an unlocked or fault state from triggering an alarm immediately:

• Timeout and Timeout Delay postpone Time Error alarms for a user-configured interval. See

“Timeout and Timeout Delay” on page 71.

• Power-on Alarm Suppress prevents alarms from being triggered for a user-configured interval after the XLi boots and starts. See “

Time Error and Time Threshold

Time Threshold sets the threshold in ns above which Time Error triggers an alarm. When the oscillator’s predicted worst-case time error (“ enters a fault state.

F13 – Time Error” on page 52) exceeds Time Thresh o ld, Time Error

Power On Alarm Suppress” on page 72.

Alarm Status LED” on

C: SNMP” on page 151.)

Note: When Time Threshold is set to zero, it defaults to an appropriate value for the type of refer-

ence source. For example, when Time Threshold is set to “0”, the XLi applies 150 ns as the value while the reference locked to a GPS reference.

LED Blink

When LED Blink is enabled, the Alarm Status LED on the front panel blinks when it is green or yellow. The LED does not blink when it is red, even if LED Blink is enabled. Some users disable LED Blink to ensure that the LED’s color (state) is displayed without interruption.

Timeout and Timeout Delay

Timeout and Timeout Delay allow you to add the dimension of time to the Time Error indicator. With Timeout disabled, a Time Error fault triggers an alarm immediately. With Timeout is enabled, a Time Error fault starts counting down the number of seconds specified by Timeout Delay. When the Timeout Delay countdown finishes, the Time Error fault triggers an alarm. (Note: the Alarm Status LED on the front panel turns amber while the Timeout Delay is counting down). If the Time Error fault returns to an OK state during the Timeout Delay countdown, the countdown clears. A new Time Error fault starts the Timeout Delay countdown from the beginning. In other words, Timeout Delay countdown does not keep track of the cumulative duration of multiple Time Error faults.

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The keyboard/display interface shows the Alarm Latch as an asterisk next to an indicator, as follows:

GPS PRI OK ∗

ALARM ENABLED

Power On Alarm Suppress

Power On Alarm Suppress prevents all F73 alarms from occurring for a specified interval after the unit starts up. The factory setting is 300 seconds (five minutes). When that interval ends, current and new alarms are reported normally.

Clear Alarm Latch

Each indicator has an Alarm Latch. The Alarm Latch shows that indicator that has been in an alarm state, even if it presently reports as “Locked” or “OK”. The Alarm Latch is useful for finding transient alarms. Clear the alarm latch settings after troubleshooting or fixing the cause of an alarm so new alarms can be distinguished from previous ones.

Note that an alarm latch only records the occurrence of an alarm if it the indicator’s alarm is enabled. The alarm latch does not record the occurrence of a fault or unlocked state if the indicator’s alarm is disabled.

Keypad

Note: The Alarm Latch asterisk is not the same as the “reference source unavailable” asterisk that can

sometimes be seen on the STATUS display.

Command Line

To see the fault status of the alarm indicators, enter the following command:

F73<CR>

XLi replies:

F73<S>S<STATUS><SOURCE><S><123456789ABCDE><CR><LF>

where:

F = ASCII character F 7 = ASCII character 7 3 = ASCII character 3 <SP> = ASCII space character one or more. <SEP> = one or more separators characte rs, space, tab, or comma.

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S = ASCII character S, Status delimiter <STATUS> = 'L' Locked

'U' Unlocked

<SOURCE> = 'A' Clock IRIG A

'B' Clock IRIG B 'G' Clock IRIG G 'N' lock NASA 36 'P' Clock Primary 'S' Clock Secondary 'R' Clock to Aux Ref 'F' None

1 = '-' PLL Synthesizer Locked

'C' PLL Synthesizer Unlocked

2 = '-' LPN PLL Locked

'L' LPN PLL Unlocked

3 ='-' Primary OK

'P' Primary Fault

4 = '-' Secondary OK

'S' Secondary Fault

5 = '-' IRIG OK

'I' IRIG Fault

6 = '-' Aux Ref OK

'A' Aux Ref Fault

7 = '-' Primary Power OK

'W' Primary Power Fault

8 = '-' Secondary Power OK

'w' Secondary Power Fault

9 = '-' Rb oscillator OK

'R' Rb oscillator Fault

A ='-' DAC OK

'X' DAC Fault

B = '-' First time lock OK

'a' Clock has locked since power on but still within the user defined power on time out

'A' Clock has not locked since power on

C = '-' Time error OK

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'U' Time error Fault

D = '-' Timeout OK

'T' Timeout Fault

E ='-' NTP OK

'N' NTP Fault

To see the states the Alarm Latches for all of the indicators, enter:

F73<S>LATCH<CR>

XLi replies:

F73<S>LATCH<SEP><123><CR><LF>

To clear the Alarm Latches, enter:

F73<S>CLEAR<SEP>ALARM<SEP>LATCH<CR>

XLi replies:

The command line uses a ‘mask’ to enable or disable each indicator’s alarm. To see which indicators are Alarm Enabled, enter:

F73<S>MASK<CR>

XLi replies:

F73<S>MASK<SEP>M<12346789ABCDE><CR><LF>

where:

‘E’ = enabled ‘D’ = Disabled

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The following reference table identifies the indicators that correspond to each position in F73 mask syntax. Use this table when entering or reviewing MASK settings. Table also provides the factory settings for a unit with one or two GPS receivers:

One GPS receiver Two GPS receivers

1 = PLL Synthesizer Alarm Enabled E E 2 = LPN PLL Alarm Enabled E E 3 = GPS Primary Alarm Enabled E E 4 = GPS Secondary Alarm Enabled D E

5 = IRIG Alarm Enabled D D 6 = Aux Ref Alarm Enabled D D 7 = Primary Power Alarm Enabled E E 8 = Secondary Power Alarm Enabled D D 9 = Rb Oscillator Alarm Enabled E E A = DAC Alarm Enabled D D B = First time lock Alarm Enabled E E C = Time error Alarm Enabled E E D = Time out Alarm Enabled E E E = NTP Alarm Enabled (if NTP present) D D

Note: Alarm Mask does not provide an setting for LED BLINK, which is not an alarm setting. Also, the

Rb Oscillator Alarm Enabled setting is available even if a Rubidium oscillator is not present.

To change the Alarm Enabled setting for each indicator, enter to E (Enable), D (Disable), or “-” (Unchanged) using this format:

F73<S>MASK<SEP><123456789ABCDE><CR>

For example, to enter new mask settings, enter:

F73 MASK DDE-EEEEEEEEEE

XLi replies:

To verify the changes, enter:

F73 MASK

XLi replies:

F73 MASK DDE-EEEEEEEEEE

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To view the Time Threshold setting, enter:

F73<S>THRESHOLD<CR>

XLi replies:

F73<S>THRESHOLD<S><nanoseconds><S>ns<CR><LF>

where <nanoseconds> is the time error threshold in ns To set a new Time Threshold, enter a new value for

F73<S>THRESHOLD<SEP><nanoseconds><CR>

<nanoseconds> (Range 0 to 99,999 ns), as follows:

XLi replies:

OK<CR><LF>

To view Timeout Delay, enter:

F73<S>TIMEOUT<CR>

XLi replies:

F73<S>TIMEOUT<SEP><seconds><S>s<CR><LF>

To enter a new Time Delay, enter a value for <seconds> (Range 0 to 86,400 ns), as follows:

F73<S>TIMEOUT<SEP><seconds><CR>

XLi replies:

OK<CR><LF>

To enable LED Blink, enter:

F73<S>BLINK<SEP> ENABLE<CR>

XLi responds:

OK<CR><LF>

To disable LED Blink, enter:

F73<S>BLINK<SEP> DISABLE<CR>

To view the Power-On Alarm Suppress setting, enter:

F73<S>SUPPRESS<CR>

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The XLi responds:

F73 POWER-ON MINOR ALARM SUPPRESS 300

To set a new Power-On Alarm Suppress value, enter the following string, replacing <SEC> with the number of seconds

F73 SUPPRESS <SEC>

The XLi responds:

(Range 0 to 86,400 seconds), enter:

OK<CR><LF>

F74 – Clock Source Control

Use function F74 to select the primary and secondary reference sources and configure the fail-over sequences. The switching modes are:

• PRI or “Primary”: Ensures the unit remains connected to the primary source and doesn’t attemp t to switch. PRI is the factory setting.

• SEC or “Secondary”: Ensures the unit remains connected to the secondary source and doesn’t attempt to switch.

• PRI – SEC – SEC or “Primary – Secondary – Secondary”: the clock synchronizes with the primary source. If the primary source becomes unavailable, it switches to the secondary source and stays there, even if the primary source becomes available again. It stays on secondary even if the secondary source becomes unavailable.

• PRI – SEC – PRI or “Primary – Secondary – Primary”: the clock synchronizes with the primary source. If the primary source becomes unavailable, it switches to the secondary source. When the primary source becomes available again, it switches back to the primary.

• PRI – NSEC – PRI or “Primary – No Secondary – Primary”: the clock synchronizes with the primary source. If the primary source becomes unavailable, it switches to the secondary source. If the secondary source becomes unavailable, AND the primary is available, switches back to the primary.

Clock source switching is affected by the setting in F73 Timeout. When a reference source becomes unavailable, or unlocked, the number of seconds set in F73 Timeout must elapse before the switch occurs. While the reference source is unavailable the clock relies on a frequency source, such as it s own oscillator or Aux Ref, to keep time. (If Aux Ref is available and enabled, the XLi will use Aux Ref as its frequency source. See “ After the timeout has elapsed, the switching sequence begins.

When a time reference becomes unavailable, the XLi switches to the other time reference, if available. The configuration of the time reference (e.g., Primary or Secondary) and the settings in F74 – Clock

Source Control (page 77) determine if and how switching takes place. If no other time reference is

available, the XLi will use an Aux Ref frequency input on J3 (“

page 104) as its reference. If references are available, the XLi “freewheels” on its internal oscillator.

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F113 – J3 Input Configuration (Aux Ref)” on page 104 for more information.)

F113 – J3 Input Configuration (Aux Ref)”,

SSSSSSSSSSSS SSSSSSSSSS SSSSSSS S SSS S SSSSS S

Command Line

To display the current settings, enter:

F74<CR>

XLi responds, using the following format:

F74<S><CLK SOURCE><CR><LF>

where:

F = ASCII character F. 74 = function number. <S> = Space <CLK SOURCE> = Clock Source:

•PRI

• SEC

• PRI-SEC-SEC

• PRI-SEC-PRI

• PRI-NSEC-PRI

<CR> = carriage return character. <LF> = line feed character.

For example, enter:

F74<CR>

XLi responds (example):

F74 PRI<CR><LF>

To select PRI-SEC-SEC as the new clock source/fail-over pattern, enter:

F74 PRI-SEC-SEC<CR>

XLi responds:

OK<CR><LF >

F90 – Code Output Configuration

Use function F90 to configure the time code output format (IRIG-A, IRIG-B, or NASA 36) and modulation type (AM or DC) on the XLi’s standard CODE output.

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The factory settings for F90 are IRIG-B and AM. Although the factory configuration outputs UTC time in 24-hour format, the following can be used to

modify the code output of F90 for non-standard applications:

• “

F2 – 12/24 Hour Format” on page 39 selects between a 12 or 24-hour time format.

• “

F69 – Time Mode” on p age 65 selects between the following time scales: Local, Standard, GPS,

UTC, and TAI.

Command Line

To display the current settings, enter:

F90<CR>

XLi responds using the following format:

F90<S><CODE OUTPUT><TYPE><CR>

where:

F 90 = function number. <S> = Space <CODE OUTPUT> = IRIG-A, IRIG-B, NASA 36 <TYPE> = AM, DC <CR> = carriage return character. <LF> = line feed character.

= ASCII character F.

For example, enter:

F90<CR>

XLi responds (example):

F90 IRIG-B AM<CR><LF>

To change the Code Output selection enter:

F90 IRIG-B DC<CR>

XLi responds:

OK<CR><LF>

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F100 – Network Port Configuration & XLi Firmware

F100 provides two groups of commands:

• Group 1, available through the keypad/display and the command line, provides access to network port settings and hardware/Firmware status information.

• Group 2, available through the command line only, provides commands for changing system firmware, changing SNMP parameters, changing the user name/password, resetting the unit, and pinging other network devices.

Warning: The F100 commands have the capacity to remove the XLi from the network and disable the XLi’s system firmware. Use judiciously.

Reboot Warning: Saving changes to any F100 parameter Some of the F100 command line commands also reboot the XLi. These are identified in the following documentation.

Group 1

You can use both the keypad/display and the command line interface to access the following parameters:

• Ethernet address: XLi contains a unique Ethernet or Media Access Control (MAC) address comprised of a unique number assigned to the manufacturer, and a unique number assigned to the unit. This is factory set and cannot be changed.

• IP Address: Sets a static Internet Protocol (IP) address for the unit.

• Subnet Mask: Sets a valid subnet-mask used in IP addressing. Subnetting allows for the more efficient allocation of network addresses and management of network traffic.

• Default Gateway: The address of the router that handles packets addressed to IP devices outside the local-area network.

• 10 100 BASE-T: The network port bandwidth setting, 10 Base-T or AUTO. (10 Base-T only for earlier XLi hardware).

• Remote Lockout: Enables or disables remote access through the XLi’s standard network port. Enabling Remote Lockout limits users to the front-panel keypad or Serial I/O port.

• Flash CRC: Status - Passed or failed.

• RAM: Status - Passed or failed.

• Serial: Status - Passed or failed.

• Version Test: Status - Passed or failed

using the keypad/display will reboot the XLi.

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The following table gives the command line equivalents for each of the preceding parameters:

Description “F100” followed by: Comments

Ethernet address (MAC address)

IP Address IP Displays, configures and reboots Subnet Mask SM Displays, configures and reboots Default Gateway G Displays, configures and reboots IP Address, Subnet Mask,

and Default Gateway 10 100 BASE-T BASET Displays, configures and reboots Remote Lockout L (for status), LOCK, UNLOCK Displa ys an d co nf igu re s Flash CRC ST Displays information RAM ST Displays information Serial ST Displays information Version Test

(NVRAM Ver)

EA Displays information

IC Displays several IP parameters

ST Displays information

Group 2

The following expanded command set is available through the command line interface:

Description “F100” followed by: Comments

Burn Host BH Configure Burn BU Commit action Burn Bootloader BUB Commit action Burn Filesystem BF Commit action Configure SNMP Parameters CONFIG Move files Factory Mode Jumper J Display only Reboot K I L L Commit action – reboot the XLi Change User Password P Configure Ping PI Commit action Change User Name PN Commit action

You can reconfigure two or more network parameters in a single entry by sending the F100 command and entering new values. Leading zeros may be omitted when entering IP Address, Subnet Mask, and Default Gateway . Any field may be omitted a nd order is not sig nificant. Blanks are allowed on either side of a colon. The unit reboots after any network parameter is changed.

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F100 EA – Ethernet Address

Use function F100 EA to display the Ethernet Address (MAC Address) (Note: An Ethernet or MAC Address is not the same thing as an IP Address), a fixed, six-byte, hexadecimal value specific to the unit’s standard network port. The first three bytes are registered to Symmetricom Inc.; the last three

bytes are the hex value identifying the network port. To display the Ethernet address of the unit standard network port, enter:

F100 EA<CR>

The XLi responds:

F100 EA:00-A0-69-xx-xx-xx<CR><LF>

where “00-A0-69” is the portion of the address assigned to the manufacturer, and “xx-xx-xx” is unit’s unique address (in hexadecimal).

An example of the response is:

F100 EA:00-A0-69-99-00-37

Attempts to set this field will be rejected with a syntax error message.

F100 IP – IP Address

Use function F100 IP to display or change the unit’s IP Address. Use the following format to display the IP address:

F100<S>IP<CR>

Use the following format to set the IP address and restart the unit, enter:

F100<S>IP<S><nnn.nnn.nnn.nnn><CR>

where:

F = ASCII character F 100 = unit function number <S> = space IP = specify IP command <nnn.nnn.nnn.nnn> = dotted decimal address (0 to 255) <CR> = input line terminator

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For example, enter:

F100 IP 206.54.0.21<CR>

XLi responds:

OK<CR><LF> RESETING THE UNIT<CR><LF> PLEASE WAIT…<CR><LF>

To obtain the IP address of the unit Standard network port, enter:

F100 IP<CR>

The XLi responds (example):

F100 IP 206.54.0.21<CR><LF>

The three commands, F100 IP, F100 SM, and F100 G, can be concatenated to set all three values simultaneously. To do so use the following format:

F100<S>IP<S><nnn.nnn.nnn.nnn><S>SM<S><nnn.nnn.nnn.nnn ><S>G<S><nnn.n nn.nnn.nnn><CR>

Note: The three commands (i.e., IP, SM, G) can be used in any order relative to each other. A colon

separator “:” can be used instead of <S> following IP, SM, and G (e.g.,

For example, using appropriate values for your network, enter something similar to:

F100 IP 192.169.46.150 SM:255.255.255.0 G 192.168.46. 1<CR>

XLi responds:

OK<CR><LF> RESETING THE UNIT<CR><LF> PLEASE WAIT…<CR><LF>

IP:192.168.46.150)

F100 SM – Subnet Mask

Note: F100 SM can be used concurrently with F100 IP and F100 G. See the last example provided in

the F100 IP – IP Address

Use function F100 SM to display or configure the Subnet Mask. To set the Subnet Mask and restart the unit, enter:

F100<S>SM<S><nnn.nnn.nnn.nnn><CR>

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section, directly above this one.

SSSSSSSSSSSS SSSSSSSSSS SSSSSSS S SSS S SSSSS S

where:

F 100 = unit function number

= ASCII character F

<S> = space IP = specify IP command <nnn.nnn.nnn.nnn> = dotted decimal address (0 to 255) <CR> = input line terminator

For example, enter:

F100 SM 255.255.255.240<CR>

XLi responds:

OK<CR><LF> RESETING THE UNIT<CR><LF> PLEASE WAIT…<CR><LF>

To obtain the Subnet Mask of the unit Standard network port, enter:

F100 SM<CR>

The XLi responds:

F100 SM <nnn.nnn.nnn.nnn><CR><LF>

where “<nnn.nnn.nnn.nnn>” is the dotted decimal address notation. An example of the response is:

F100 SM:255.255.255.125<CR><LF>

F100 G – Gateway

Note: F100 G can be used concurrently with F100 IP and F100 SM. See the last example provided in

the F100 IP – IP Address

Use function F100 G to display or configure the Default Gat eway. To set the Default Gateway and rest art the unit, enter:

F100<S>G<S><nnn.nnn.nnn.nnn><CR>

section, which starts on page 82.

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where:

F = ASCII character F 100 = unit function number <S> = space IP = specify IP command <nnn.nnn.nnn.nnn> = dotted decimal address (0 to 255) <CR> = input line terminator

For example, enter:

F100 G 206.54.0.17<CR>

XLi responds:

OK<CR><LF> RESETING THE UNIT<CR><LF> PLEASE WAIT…<CR><LF>

To obtain the Default Gateway of the unit Standard network port, enter:

F100 G<CR>

The XLi responds:

F100 G <nnn.nnn.nnn.nnn><CR><LF>

where “<nnn.nnn.nnn.nnn>” is the dotted decimal address notation. An example of the response is:

F100 G:206.54.0.1<CR><LF>

F100 IC – Network Port Settings

Use function F100 IC to review the entire configuration of the standard network port, enter:

F100<S>IC<CR>

An example of the response is:

F100 IP:206.54.0.21 SM:255.255.255.240 G:206.54.0.17<CR><LF>

F100 BASET – 10/100 BASE- T

The BASET command displays the data rate of the Ethernet port. On the current version of the Main CPU card (87-8000) running the current system software version, the user also has the option of

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selecting between 10 Base-T and Auto. If you have questions about your unit, contact H: Sales and

Customer Assistance (page 197).

To display the current Base-T setting, enter:

F100<S>BASET<CR>

where

F 100 = unit function number <S> = Space BASET = specify Base-T command <CR> = input line terminator

= ASCII character F

The XLi responds:

F100 BASET 10T<CR><LF>

To set the Ethernet port to automatically negotiate the maximum connection speed, enter:

F100<SP>BASET<SP>AUTO

To set the Ethernet port’s connection speed to 10Base-T, enter:

F100<SP>BASET<SP>10

XLi responds:

OK <CR><LF> RESETING THE UNIT<CR><LF> PLEASE WAIT…<CR><LF>

F100 L/LOCK/UNLOCK – Remote Lockout

Use function F100 LOCK or UNLOCK to enable/disable remote access to the command line interface through the network port. Use function F100 L to display the status of Remote Lockout. Remote Lockout can also be set using F100 on the keypad/display interface. The factory setting is “Unlocked”. To unlock remote lockout, use the keypad/display or the serial port’s command line interface (The network port is not available because it has been locked).

Warning: F100 L and F100 LOCK terminates any active network sessions and prevents future

network sessions. To unlock F100 L or F100 LOCK, use the serial port command line interface or the keypad display.

To lock the unit from a remote location, enter:

F100 LOCK<CR>

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where:

F = ASCII character F 100 = unit function number <S> = space LOCK = specify LOCK command <CR> = input line terminator

For example, enter:

F100 LOCK<CR>

To users on the serial port, XLi responds:

OK<CR><LF>

Or, to users on the network port, XLi gives the following response and then closes the port:

GOODBYE.<CR><LF>

To unlock remote lockout, use the command line interface on the serial port to enter:

F100 UNLOCK<CR>

Or use the keypad/display’s F100.

F100 L – Remote Lockout

Command Line Only – Not available in display. Use function F100 L to display the status of the remote lock. For more information, see F100 LOCK

above. To view the lock setting for remote access, enter:

F100 L<CR>

where:

F = ASCII character F 100 = unit function number <S> = space L = specify L command <CR> = input line terminator

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XLi responds:

F100 L LOCKED<CR><LF>

F100 L UNLOCKED<CR><LF>

F100 ST – Self Test Status

Use function F100 ST to display whether the Self Test Status parameters passed or failed. The parameters include: flash-memory checksum test, nonvolatile (NV) RAM, Serial Port, and version check.

To query the self-test status, enter:

F100<S>ST<CR>

where:

F 100 = unit function number <S> = space ST = specify ST command <CR> = input line terminator

= ASCII character F

The XLi responds:

F100<S>ST<S>FLASH/CRC:<S><STATUS>,<S>RAM:<S><STATUS>, <S>SERIAL:<S> <STATUS>, <S>NVRAM<S>VER:<S><STATUS><CR><LF>

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where:

F = ASCII character F 100 = Unit function number <S> = Space ST = Specify ST command FLASH/CRC: = Specify flash checksum result RAM: = Specify RAM test result SERIAL: = Specify Serial Port test result. NVRAM VER: = Specify version test result. This test compares the version of the code against the version

recorded in Non-Volatile memory

<STATUS> = Is either ASCII PASS or FAIL , = ASCII comma : = ASCII colon <CR><LF> = Output line terminator

An example of the response is:

F100 ST FLASH/CRC : PASS, RAM : PASS, SERIAL : PASS, NVRAM VER : PA SS<CR><LF>

F100 BH – Burn Host

Use function F100 BH, when upgrading firmware, to select the FTP host and the file to be transferred. To select the FTP host and file for upgrading, enter:

F100 BH <FTP HOST IP ADDRESS><S><UPGRADE FILE PATH>/< FILE NAME><CR>

Use UNIX style forward slashes ‘/’ in path and leave the drive letter (e.g., ‘C’) out of the path. For example:

F100 BH 10.1.7.20 truetime/xli/192-8001.bin<CR>

The XLi responds:

BURN HOST IS READY!!!<CR><LF>

F100 BUB – Burn BootLoader

Note: See “B: Upgrading System Firmware” on page 145.

When upgrading the system firmware, use function F100 BUB to burn the BootLoader, to write the BootLoader to flash memory.

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To write the BootLoader to the flash, send the F100 BH command with the FTP host, file p ath and name, and then enter:

F100 BUB<CR>

XLi responds:

OK<CR><LF>

For example:

>f100 bub OK BURNING FILE 192-8000.bt WITH SIZE 452164 TO PARTITIO N:0 SECTOR:0 SEC: 0 RE: 0 SEC: 1 RE: 0 SEC: 2 RE: 0 SEC: 3 RE: 0 SEC: 4 RE: 0 SEC: 5 RE: 0 SEC: 6 RE: 0 FLASH SUCCESSFULLY PROGRAMMED CRC32 = 0x9EFBE60A

If more than ten flash sectors are written during this process, you must rewrite both the bootloader sectors (0 to 9) and the program binary sectors (10 to 93).

F100 BU – Burn

Note: See “B: Upgrading System Firmware” on page 145.

Use function F100 BH when upgrading firmware, to write the file selected with F100 BH to the flash memory. Flash memory is checked to ensure that the correct file is used.

To write the file to the flash, send the F100 BH command with the FTP host, file path and name, and then enter:

F100 BU<CR>

XLi responds:

OK<CR><LF>

And, for example, displays the following text:

>f100 bu OK

BURNING FILE 192-8001.bin WITH SIZE 803016 TO PARTITI ON:1 SECTOR:1 0 SEC: 10 RE: 0 SEC: 11 RE: 0 SEC: 12 RE: 0 SEC: 13 RE: 0

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SSSSSSSSSSSS SSSSSSSSSS SSSSSSS S SSS S SSSSS S

SEC: 14 RE: 0 SEC: 15 RE: 0 SEC: 16 RE: 0 SEC: 17 RE: 0 SEC: 18 RE: 0 SEC: 19 RE: 0 SEC: 20 RE: 0 SEC: 21 RE: 0 SEC: 22 RE: 0 FLASH SUCCESSFULLY PROGRAMMED CRC32 = 0x2D9A260A

F100 BF – Burn File System

Note: See “B: Upgrading System Firmware” on page 145.

Use function F100 BF to burn file system when upgrading firmware, to write a file system to the flash memory.

To write the file system to the flash, send the F100 BH command with the FTP host, file p a th and name, and then enter:

F100<S>BF<CR>

XLi responds:

OK<CR><LF>

For example:

>f100 bf OK BURNING FILE 192-8002.fs WITH SIZE 524288 SEC: 94 SEC: 95 SEC: 96 SEC: 97 SEC: 98 SEC: 99 SEC: 100 SEC: 101 SEC: 102 FILE SYSTEM FLASH BURN COMPLETED

F100 BUFP – Burn FPGA Firmware

Note: See “B: Upgrading System Firmware” on page 145.

F100 BUFP - Burn FPGA firmware from host to target flash Use Serial/Network port F100 BUFP when upgrading FPGA firmware - to write the FPGA program file

selected with F100 BH to the flash memory. Prior to issuing the F100 BUFP command, the host computer must be setup as an FTP server with the new FPGA program file stored on the FTP server.

XLi IEEE 1588 Clock 91 997-01510-03, Rev. C, 12/12/2006

SSSSSSSSSSSS SSSSSSSSSS SSSSSSS S SSS S SSSSS S

The existence of the FPGA program file on the FTP server and an Ethe rnet connection is checke d when the command is issued.

To write the FPGA program to the flash, send the F100 BH command with the FTP host, file path and name, and then send the following command:

F100 BUFP

This command is only valid for XLi with an 86-8000 Rev. G or higher CPU card. If the CPU card is of the wrong version, an error message “ERROR: INVALID COMMAND!” will be displayed.

This command is valid only via the command line interface in the following scenarios: (1) the terminal is communicating to the XLi directly via the serial port, or (2) the terminal is connected to the XLi network port and the user is logged in as an “operator”. If the terminal is connected to the XLi network port and the user is logged in as a “guest”, this command will be deemed invalid and an error message, “ERROR: ACCESS DENIED!” will be displayed.

Prior to burning the FPGA program to the target flash, another error checking step is performed. The new FPGA program size is checked against the designated memory sector in the target flash. If the memory sector is not big enough to store the FPGA program, the command will be aborted, an error message, “FILE FN, EXT (yyy BYTES) TOO LARGE FOR PARTITIONING (zzz BYTES), LOAD ABORTED” will be displayed, and the new program will not be loaded to the flash.

After all the requirements for burning the FPGA program are met, XLi will proceed to burn the FPGA program from the FTP host computer to the target flash by responding with the following output string.

OK<CR><LF>

Then, during the file burning process, output strings will be displayed on the terminal to provide status to the operator. The following is an example of a successful F100 BUFP command execution.

BURNING FILE 184-8000V57.bin WITH SIZE 97652 TO PARTI TION:3 SECTOR :10

FILE: 97652 BYTES, PARTITION: 393204 BYTES (24% used) SEC: 10 RE: 0 SEC: 11 RE: 0 FLASH SUCCESSFULLY PROGRAMMED

To load the FPGA program from the target flash to the FPGA, a reboo t of t he XLi is required fo r the new FPGA program to take effect. The XLi can be rebooted via power cycle or by issuing the F100 K I L L command on the serial port interface.

F100 CONFIG – Configure NTP & SNMP

Note: The NTP option is unavailable for the standard XLi IEEE 1588 clock. NTP-related information has been removed from this section of the manual.

Note: Symmetricom recommends using the Web Interface (versus than F100 CONFIG) as the most convenient method for editing the SNMP configuration file.

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Symmetricom XLi IEEE 1588 User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual

Notices

Table of Contents

1: Overview and Features

Overview

Description

Standard Configuration

1588-Related Specifications

IEEE 1588 card

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

Standard TCVCXO Oscillator

Standard 110 VAC Power Supply

Clock Architecture

2: System Specifications

Mechanical/Environmental

AC Power Supply

System Time & Frequency Accuracy

GPS Receiver

Aux Ref Input

Chassis

Standard Inputs and Outputs

Serial I/O Port

ALARM Output

Certifications

3: Installation and Set-up

Installing the GPS Antenna

Selecting a GPS Antenna Site

Verifying the Site

Mounting the GPS Antenna

GPS Signal Strength Requirements

Making Additional Connections and Powering Up

Configuring Network Settings

Configuring the XLi

Configuring the IEEE 1588 Card(s)

PTP Master

PTP Slave

Rack Mounting the XLi

4: User Interfaces

Alarm Status LED

Keypad/Display Interface

Time Display

Status Display

Menu Display

Keypad Operation

Keypad Examples

Command Line Interface

Logging In

Logging Out

Changing Username and Password

Session Timeout and Priority

Web Interface

User Privileges

Sessions

User Names and Passwords

Logging In

Navigating

Submitting Changes

Logging Out

Notes

5: Function Reference

Function Summary

F8 - Continuous Time Once-per-Second

The Format of the F8 Output String

While Synchronizing to a Reference Source

After Loosing a Reference Source

F9 - Time On Request

F11 - Time Output Format