EndRun Tempus LX GPS User manual

"Smarter Timing Solutions"
Tempus LX
GPS
Network Time Server
User Manual


Tempus LX GPS User Manual
Tempus LX
GPS
Network Time Server User Manual
Preface
Thank you for purchasing the Tempus LX Network Time Server. Our goal in developing this product
is to bring precise, Universal Coordinated Time (UTC) into your network quickly, easily and reliably.
Your new Tempus LX is fabricated using the highest quality materials and manufacturing processes
available today, and will give you years of troublefree service.
About EndRun Technologies
EndRun Technologies is dedicated to the development and renement of the technologies required to
fulll the demanding needs of the time and frequency community.
Our innovative engineering staff, with decades of experience in the research and development of
receiver technology for the Global Positioning System (GPS), has created our window-mount GPS
antenna and extended hold-over oscillator-control algorithms.
The instruments produced by EndRun Technologies have been selected as the timing reference for
such rigorous applications as computer synchronization, research institutions, aerospace, network
quality-of-service monitoring, satellite base stations, and calibration laboratories.
EndRun Technologies is committed to fullling your precision timing needs by providing the most
advanced, reliable and cost-effective time and frequency equipment available in the market today.
Trademark Acknowledgements
IBM-PC, Linux, NotePad, Timeserv, UNIX, Windows NT, WordStar are registered trademarks of the
respective holders.
Part No. USM3015-0000-000 Revision 11
May 2008
Copyright © EndRun Technologies 2005-2008

Tempus LX GPS User Manual
Tempus LX GPS User Manual
About This Manual
This manual will guide you through simple installation and set up procedures.
Introduction – The Tempus LX, how it works, where to use it, its main features.
Basic Installation – How to connect, congure and test your Tempus LX with your network.
Client Set-Up – Two sections; one for Unix-like platforms and one for Windows NT/2000/XP.
Console Port – Description of the Linux console commands for use over the network and serial ports.
Front-Panel Keypad and Display – How to operate the user interface that provides convenient setup and
monitoring of the instrument.
If you detect any inaccuracies or omissions, please inform us. EndRun Technologies cannot be held
responsible for any technical or typographical errors and reserves the right to make changes to the
product and manuals without prior notice.
Warranty
This product, manufactured by EndRun Technologies, is warranted against defects in material and
workmanship for a period of three years from date of shipment, under normal use and service. Dur-
ing the warranty period, EndRun Technologies will repair or replace products which prove to be
defective.
For warranty service or repair, this product must be returned to EndRun Technologies. Buyer shall
prepay shipping charges to EndRun Technologies and EndRun Technologies shall pay shipping
charges to return the product to Buyer. However, Buyer shall pay all shipping charges, duties, and
taxes for products returned to EndRun Technologies from another country.
Products not manufactured by EndRun Technologies but included as an integral part of a system (e.g.
peripherals, options) are warranted for ninety days, or longer as provided by the original equipment
manufacturer, from date of shipment.
Extended Warranty
The MTBF (Mean Time Between Failures) for this product is 225,000 hours (25 years). After the
initial warranty period it is most cost-effective for the customer to repair the unit on an “as needed ba-
sis”, rather than pay for an extended warranty or the annually recurring fees of a service contract..
Limitation of Warranty
The foregoing express warranty shall not apply to defects resulting from improper or inadequate
maintenance by Buyer or User, Buyer-supplied software or interfacing, unauthorized modication or
misuse, operation outside of the environmental specications for the product, or improper site prepa-
ration or maintenance.
TO THE EXTENT PERMITTED BY LAW, THIS WARRANTY AND REMEMDIES SET FORTH
ABOVE ARE EXCLUSIVE AND IN LIEU OF ALL OTHER WARRANTIES, REMEDIES AND
CONDITIONS WHETHER ORAL OR WRITTEN, STATUTORY, EXPRESS, OR IMPLIED. AS
PERMITTED BY APPLICABLE LAW, ENDRUN SPECIFICALLY DISCLAIMS THE IMPLIED
WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE.

Tempus LX GPS User Manual
Tempus LX GPS User Manual
Warranty Repair
If you believe your equipment is in need of repair, call EndRun Technologies and ask for a customer
service agent. It is important to contact us rst as many problems may be resolved with a phone call.
Please have the serial number of the unit and the nature of the problem available before you call. If
it is determined that your equipment will require service, we will issue an RMA number. You will be
asked for contact information, including your name, address, phone number and e-mail address.
Ship the unit prepaid in the original container or a container of sufcient strength and protection to
EndRun Technologies. EndRun will not be responsible for damage incurred during shipping to us.
Be sure the RMA number is clearly identied on the shipping container. Our policy is to x or repair
the unit within 5 business days. If it is necessary to order parts or if other circumstances arise that
require more than 5 days, an EndRun service technician will contact you.
Repair After Warranty Expiration
If the warranty period has expired, we offer repair services for equipment you have purchased from
EndRun. Call and ask for a customer service agent. It is important to contact us rst as many prob-
lems may be resolved with a phone call. Please have the serial number of the unit and the nature
of the problem available before you call. If it is determined that the equipment has failed and you
want EndRun to perform the repairs, we will issue you an RMA number. Ship the unit prepaid in
the original container or a container of sufcient strength and protection to EndRun Technologies.
EndRun will not be responsible for damage incurred during shipping to us. Customer is responsible
for shipping costs to and from EndRun Technologies. Be sure the RMA number is clearly identied
on the shipping container. After the equipment has been received we will evaluate the nature of the
problem and contact you with the cost to repair (parts and labor) and an estimate of the time neces-
sary to complete the work.
Limitation of Liability
The remedies provided herein are Buyer’s sole and exclusive remedies. EndRun Technologies shall
not be liable for any direct, indirect, special, incidental or consequential damages, whether based on
contract, tort or any other legal theory.
EndRun Contact Information
Address: EndRun Technologies
2270 Northpoint Parkway
Santa Rosa, CA 95407
Phone: (707)573-8633
Fax: (707)573-8619
Sales: 1-877-749-3878 or (707)573-8633
Support: 1-877-749-3878 or (707)573-8633

Tempus LX GPS User Manual
Tempus LX GPS User Manual

Tempus LX GPS User Manual
Tempus LX GPS User Manual
Table of Contents
Preface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .i
About EndRun Technologies . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .i
Trademark Acknowledgements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .i
About This Manual . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ii
Warranty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ii
Extended Warranty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ii
Limitation of Warranty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ii
Warranty Repair . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .iii
Repair After Warranty Expiration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .iii
Limitation of Liability . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .iii
EndRun Contact Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .iii
Chapter One - Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
GPS Timing-How It Works . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Where to Use It . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Main Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Performance, Reliability and Economy . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Flexibility . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Easy Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Free FLASH Upgrades . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Chapter Two - Basic Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Checking and Identifying the Hardware . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Tempus LX Physical Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Performing an Initial Site Survey . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Installing the Tempus LX . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Mount the Tempus LX . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Connecting the DC Power Option . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Connecting and Configuring Ethernet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Configuring Ethernet with the Front-Panel Keypad . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Configuring Ethernet with the Serial Port . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Tempus LX GPS User Manual
Tempus LX GPS User Manual
Connect the RS-232 Serial I/O Port . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Test the Serial Port . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Using netconfig to Set Up Your IP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Verify Network Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Check Network Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Using Telnet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Using SSH . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Configuring the Network Time Protocol . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Configuring NTP Using the Front-Panel Keypad . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Configuring NTP Using the Network Interface or Serial Port . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Configuring the Tempus LX as a Stratum 2 Server . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Chapter Three - Setting Up NTP Clients on Unix-like Platforms . . . . . . . . . . . . . 19
Basic NTP Client Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Configure NTP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
MD5 Authenticated NTP Client Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Create the ntp.keys File . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Configure NTP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Broadcast/Multicast NTP Client Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Configure NTP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Chapter Four - Setting Up NTP Clients on Windows NT 4.0/2000/XP . . . . . . 25
Basic NTP Client Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Configure NTP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
MD5 Authenticated NTP Client Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Create the ntp.keys File . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Configure NTP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Broadcast/Multicast NTP Client Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Configure NTP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Chapter Five - Front-Panel Keypad and Display . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Display Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Keypad Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Display and Keypad Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

Tempus LX GPS User Manual
Tempus LX GPS User Manual
Traversing the Display Structure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Editing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Keypad EDIT Lockout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Using Help . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Shortcut Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Detailed Display Descriptions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Time/Status . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Main Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Receiver Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Receiver Status . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Reference Position . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
GPS Dynamic Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
Oscillator Status . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
Antenna Fault Mask . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
Signal Loss Fault Mask . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
Clock Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
Time Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
Local Offset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
Hours Display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
Daylight Savings Time . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
CPU I/O Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
1PPS Output Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
Timecode Output Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
Programmable TTL Output Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
Synthesizer (DDS) Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
Serial Time Output Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
Display Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
Faults . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
Network Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
NTP Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
NTP Status . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
NTP Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
Firmware . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
About . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40

Tempus LX GPS User Manual
Tempus LX GPS User Manual
Chapter Six - Control and Status Commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
General Linux Shell Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
Available User Commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
Detailed Command Descriptions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
accessconfig . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
antfltmask . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
cpuopts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
cpuoptsconfig . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
eraserootfs_1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
gntphwaddr . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
gntposctype . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
gntppasswd . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
gntprootfs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
gntpstat . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
gntptimemode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
gntptimemodeconfig . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
gntpversion . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
gpsdynmode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
gpsrefpos . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
gpsstat . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
gpstrkstat . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
gpsversion . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
help . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
inetdconfig . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
kplockstat . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
lockoutkp . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
netconfig . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
ntpconfig . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
setantfltmask . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
setgpsdynmode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
setgpsrefpos . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
setsigfltmask . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
sigfltmask . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52

Tempus LX GPS User Manual
Tempus LX GPS User Manual
unlockkp . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
updaterootflag . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
upgradegps . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
upgradekernel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
RS-232 Serial I/O Port Signal Definitions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54
Chapter Seven - IPv6 Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
Enabling New IPv6 Capabilities . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
OpenSSH . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
Net-SNMP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
IPv6-Capable syslog-ng . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56
IPv4-Only Protocols . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56
Appendix A - Security . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57
Linux Operating System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57
OpenSSH . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58
Network Time Protocol . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59
Appendix B - Upgrading the Firmware . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61
What You Need To Perform the Upgrade . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61
Performing the Linux/NTP Upgrade . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61
Recovering from a Failed Upgrade . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63
Performing the Linux Kernel Upgrade . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63
Performing the GPS Upgrade . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64
Problems with the GPS Upgrade . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65
Appendix C - Simple Network Management Protocol (SNMP) . . . . . . . . . . . . . . . 67
SNMPv3 Security . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67
Enterprise Management Information Base (MIB) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67
Invocation of the SNMP daemon . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68
Quick Start Configuration -- SNMPv1/v2c . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68
Configuring SNMPv1 Trap Generation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69
Configuring SNMPv2c Notifications and Informs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69
Configuration of SNMPv3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69

Tempus LX GPS User Manual
Appendix D - GPS Reference Position . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73
Obtaining Reference Positions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73
Using a Handheld GPS Receiver . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73
Using Geodetic Databases . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73
Appendix E - Time Figure-of-Merit (TFOM) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77
Appendix F - Serial Time Output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 79
Sysplex Format . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 79
Truetime Format . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 80
EndRun Format . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 80
EndRunX (Extended) Format . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 81
NENA Format . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 81
NMEA-0183 Format . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 82
Appendix G - Third-Party Software . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 85
GNU General Public License . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 85
NTP Software License . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 90
Appendix H - Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 91
Appendix I - Software Release Notes for Previous Tempus LX Users . . . . . . . . 97
Special Modifications - Changes for Customer Requirements . . . . . . . . . . . . . . . 101

Tempus LX GPS User Manual
1
"Smarter Timing Solutions"
Chapter
One
Introduction
The Tempus LX is a precision server of Universal Coordinated Time (UTC) that can be connected via
a 10/100Base-T ethernet port to any TCP/IP network. In its most basic operation, it sends Network
Time Protocol (NTP)/Simple Network Time Protocol (SNTP) reply packets in response to NTP/SNTP
request packets which it has received from clients. The timestamps it sends in its NTP/SNTP reply
packets are accurate to less than one-hundred microseconds. NTP/SNTP client software is available
for virtually all operating systems.
The Tempus LX is composed of a Global Positioning System (GPS) time and frequency engine inte-
grated with an IBM-PC compatible fanless, convection-cooled 133 MHz CPU with integral ethernet
interface, a graphic vacuum-uorescent display, a keypad, and a power supply. Non-volatile stor-
age of the embedded Linux operating system and the Tempus LX application software is via FLASH
memory.
For more detailed information that is not included in this manual, and links to other sites, please visit
our website: http://www.endruntechnologies.com. There you can also download rmware upgrades,
the latest manuals and other documentation.
GPS Timing-How It Works
The time and frequency engine in the Tempus LX receives transmissions from satellites that are
operating in compliance with the Navstar GPS Interface Control Document (ICD) known as GPS-
ICD-200. It species the receiver interface needed to receive and demodulate the navigation and
time transfer data contained in the GPS satellite transmissions. The GPS navigation system requires
a means of synchronizing the satellite transmissions throughout the constellation so that accurate
receiver-to-satellite range measurements can be performed via time-of-arrival measurements made
at the receiver. For the purposes of locating the receiver, measurements of the times-of-arrival of
transmissions from at least four satellites are needed. For accurate time transfer to a receiver at a
known position, reception of the transmissions from a single satellite is sufcient.
The GPS system designers dened system time to be GPS time. GPS time is maintained by an
ensemble of high-performance cesium beam atomic frequency standards located on the earth’s
surface. GPS time is measured relative to UTC, as maintained by the United States Naval Observa-
tory (USNO), and maintained synchronous with UTC-USNO except that it does not suffer from the
periodic insertion of leap seconds. Such discontinuities would unnecessarily complicate the system’s
navigation mission. Contained in the data transmitted from each satellite is the current offset between
GPS time and UTC-USNO. This offset is composed of the current integer number of leap seconds
difference and a small residual error that is typically less than +/- 10 nanoseconds.
Each satellite in the constellation contains redundant cesium beam or rubidium vapor atomic frequen-
cy standards. These provide the timebase for all transmissions from each satellite. These transmis-

Tempus LX GPS User Manual
2
CHAPTER ONE
sions are monitored from ground stations located around the world and carefully measured relative to
GPS time. The results of these measurements for each satellite are then uploaded to that satellite so
that they may be incorporated into the data contained in its transmissions. The receiver can use this
data to relate the time-of-arrival of the received transmissions from that satellite to GPS time.
All of this means that during normal operation, the source of the timing information being transmit-
ted from each of the satellites is directly traceable to UTC. Due to the nature of the GPS spread
spectrum Code Division Multiple Access (CDMA) modulation scheme, this timing information may
be extracted by a well-designed receiver with a precision of a few nanoseconds. The GPS time and
frequency engine in the Tempus LX does just that.
Where to Use It
Since signals from the GPS satellites are available at all locations on the globe, you may deploy the
Tempus LX virtually anywhere. However, you must be able to install an antenna either on the roof-
top or in a window so that satellite transmissions may be received at least several times during the
day. Once synchronized, the Tempus LX can maintain acceptable network synchronization accuracy
for about a day without GPS reception, by ywheeling on its standard temperature compensated
crystal oscillator.
Because the Tempus LX has been designed to operate in conjunction with existing public domain
NTP/SNTP client software that has been created for use with similar time servers, it may be used
in any computer network environment that is using TCP/IP protocols. Although client software is
available for all platforms, for the most precise applications, the Unix-like operating systems are best
supported.
Main Features
Performance, Reliability and Economy
The Tempus LX provides high performance and reliability combined with low power consumption
and cost. Its internal sub-assemblies are fabricated using state-of-the-art components and processes
and are integrated in a solid, high-quality chassis.
Flexibility
It supports a variety of TCP/IP network protocols compatible with a variety of platforms and operat-
ing systems.
Easy Installation
Its standard 1U high, 19” rack-mountable chassis and rooftop or window-mounted antenna make
installation simpler compared to competing products that require rooftop installation of the antenna.
The rack-mount chassis may be mounted in any convenient location. Connect it to your network
via the rear panel mounted, 10/100Base-T RJ-45 connector and plug in the AC power cord. Initial
network conguration is automatic on networks using the Dynamic Host Conguration Protocol
(DHCP). Manual network conguration is via the RS-232 serial I/O port and a simple Linux shell
script.
Free FLASH Upgrades
Firmware and congurable hardware parameters are stored in non-volatile FLASH memory, so the
Tempus LX can be easily upgraded in the eld using FTP and TELNET or the local RS-232 serial I/O
port. Secure upgrades are possible via SSH and SCP. We make all rmware upgrades to our prod-
ucts available to our customers free of charge.

Tempus LX GPS User Manual
3
"Smarter Timing Solutions"
Chapter
Two
Basic Installation
This chapter will guide you through the most basic checkout and physical installation of your Tempus
LX. Subsequent chapters and appendices will give you the information needed to congure your
installation for the maximum performance in your operating environment. General NTP client setup
instructions will also be supplied to get you started using your Tempus LX quickly.
Basic familiarity with TCP/IP networking protocols like ping, telnet and ftp is required. Though
some familiarity with Linux or other Unix-like operating systems would be helpful, it is not essen-
tial. If you satisfy these conditions, the instructions provided herein should guide you to a successful
installation.
Checking and Identifying
the Hardware
Unpack and check all the items using the shipment packing list. Contact the factory if anything is
missing or damaged. The Tempus LX shipment typically contains:
• Tempus LX (part # 3015-0001-000 or #3015- variant)
• Tempus LX User Manual (part #USM3015-0000-000)
• IEC 320 AC Power Cord (part #0501-0003-000)
(This part will not be present if using the DC power option.)
• DB9F-to-DB9F Null-Modem Serial I/O Cable (part #0501-0002-000)
• RJ-45 to RJ-45 CAT-5 patch cable, 2 meters (part #0501-0000-000)
• Antenna/cable assembly (part #0610-0006-001 or #0610- variant)

Tempus LX GPS User Manual
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CHAPTER TWO
5Tempus LX GPS User Manual
BASIC INSTALLATION
Tempus LX Physical
Description
Sync LED This green LED ashes to indicate synchronization status.
Network LED This amber LED illuminates when the Tempus LX is connected to the
network and ashes when receiving or transmitting packets..
Alarm LED This red LED illuminates briey at power-up, and thereafter whenever
a serious fault condition exists.
50-60 Hz
0.5A.
100-240V~
desired operation.
received, including interference that may cause un-
and (2) this device must accept any interference
(1)This device may not cause harmful interference,
Operation is subject to the following two conditions
This device complies with part 15 of the FCC Rules.
RECEIVER/CPU I/O PANEL
00:D0:C9:55:69:FC
RS-232
ANTENNA 1PPS
AM CODE
Santa Rosa CA Made in USA
endruntechnologies.com
SERIAL MNUMBER
04080043
MODEL NUMBER
3018-0002-000
MODEL
CDMA NTS
SERIES
TEMPUS LX
TECHNOLOGIES
EndRun
Antenna Jack This TNC connector mates with the downlead cable from the external
antenna.
RS-232 Connector This DB-9M connector provides the RS-232 serial I/O console
interface to the Tempus LX. This console allows the user to initialize
and maintain the Tempus LX. See Chapter 6 - RS-232 Serial I/O Port
Signal Definitions for detailed information.
10/100Base-T Jack This RJ-45 connector mates with the ethernet twisted pair cable from
the network.
1PPS Jack This BNC connector provides the optional 1PPS TTL output, and is
(Option) usually labeled “SPARE”. The pulse width is normally 1 millisecond
wide when shipped from the factory but can be changed via the
front-panel keypad or via command cpuoptsconfig. See
details in Appendix H - Specifications for the 1PPS Output.
1PPS (RS-422) This optional DB-9M connector provides the 1PPS output at RS-422
(Option) levels and is usually not installed. The pulse width is normally
1 millisecond wide when shipped from the factory but can be changed
via the front-panel keypad or via command cpuoptsconfig. See
pinout details in Appendix H - Specifications for the 1PPS RS-422
Output.
AM Code Jack This BNC connector provides the optional amplitude-modulated
(Option) timecode output, and is usually labeled “SPARE”. The timecode output
is normally IRIG-B122 when shipped from the factory, but can be
changed via the front-panel keypad or via command cpuoptsconfig.
See details in Appendix H - Specifications for the AM Code Output.

Tempus LX GPS User Manual
4
CHAPTER TWO
5Tempus LX GPS User Manual
BASIC INSTALLATION
Alarm Jack This BNC connector (or terminal strip) provides the optional alarm
(Option) output, and is usually not installed. If installed, see details in Appendix
H - Specifications for the Alarm Output.
Prog TTL Jack This BNC connector provides the optional Programmable TTL pulse
(Option) rate output and is usually not installed. If installed, see details in
Appendix H - Specifications for the Programmable TTL output.
This pulse rate is normally shipped from the factory as 10MPPS
but can be changed via the front-panel keypad or command
cpuoptsconfig.
10MPPS or 100 PPS, etc. This BNC connector provides an optional customer-specied
(Option) rate output and is usually not installed. If installed, it will be labeled
for the appropriate rate such as “10 MPPS” or “100 PPS”, etc. This
output is set at the factory and cannot be changed. See details in
Appendix H - Specifications for the Fixed Rate Output.
Serial Time Output This optional DB-9M connector provides the RS-232 serial I/O
(Option) interface with a once-per-second ASCII time string output. For further
information refer to Appendix F - Serial Time Output.
AC Power Input Jack This IEC 320 standard three-prong connector provides AC power.
DC Power Input Block This optional 3-position terminal block provides connection to the
DC power source, and replaces the AC power input jack.
Performing an
Initial Site Survey
Using the status LED indicators, it’s easy to nd out if your Tempus LX will work in your desired
location:
1. Screw the TNC plug on the end of the antenna cable onto the TNC antenna input jack on the chas-
sis rear panel of the Tempus LX.
2. Plug one end of the supplied AC power cord into an 85-270 VAC outlet.
3. Plug the other end into the AC input connector on the chassis rear panel of the Tempus LX.
Place the antenna in a window, or for best performance, mount it on the roof using the supplied
mounting hardware. Make sure that it is not blocked by large metallic objects closer than one meter.
Although the antenna should normally be installed in a vertical orientation for rooftop installations,
when window mounting it should be pointed out the window, in the direction that gives the best clear
view to the sky. This will improve its ability to receive signals from satellites near the horizon.
Initially upon power up:
1. The unit will light the red Alarm Status LED for about ten seconds.
_
+

Tempus LX GPS User Manual
6
CHAPTER TWO
7Tempus LX GPS User Manual
BASIC INSTALLATION
2. Then it will continuously light the green Sync Status LED.
3. When the unit locks onto a GPS signal and begins to decode the timing data and adjust the local
oscillator, the green Sync Status LED will ash very rapidly (about a 6 Hz rate) until the data is fully
decoded and the local oscillator is fully locked to the GPS frequency.
4. Then the green Sync Status LED will pulse at precisely a 1 Hz rate, synchronized to UTC seconds,
with a short on duration relative to the off duration.
At this point, the GPS time and frequency engine has fully synchronized, and you may proceed to
permanently mounting the chassis and antenna in their desired locations.
If this sequence has not occurred within twenty-four hours, and you have mounted your antenna in a
window or your rooftop installation has poor sky visibility, you may need to provide an accurate ref-
erence position to the unit so that it can operate with only one satellite in view. If you have mounted
the antenna in a window and can easily move it to the rooftop, you should do that rst. Should you
need to provide a reference position to the unit, refer to Appendix D - GPS Reference Position and
the setgpsrefpos command for details.
If you are unable to achieve GPS lock after trying all of these suggestions, then your Tempus LX may
be damaged and should be returned to the factory for repair or exchange.
Installing the Tempus LX FCC NOTICE
This equipment has been tested and found to comply with the limits for a Class A digital device, pursuant
to part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful
interference when the equipment is operated in a commercial environment. This equipment generates,
uses, and can radiate radio frequency energy and, if not installed and used in accordance with the instruc-
tion manual, may cause harmful interference to radio communications. Operation of this equipment in a
residential area is likely to cause harmul interference in which case the user will be required to correct the
interference at his own expense.
Mount the Tempus LX
Using standard 19” rack mounting hardware, mount the unit in the desired location. After mounting
the unit and connecting the antenna cable, verify that it still acquires and tracks a GPS signal.
CAUTION
Ground the unit properly with the supplied power cord.
Position the power cord so that you can easily disconnect it from the Tempus LX.
Do not install the Tempus LX where the operating ambient temperature might exceed 122°F (50°C).
Connecting the DC Power Option
Connect the safety ground terminal to earth ground. Connect the “+” terminal to the positive output

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7Tempus LX GPS User Manual
BASIC INSTALLATION
of the DC power source. Connect the “-” terminal to the negative output of the DC power source.
Note that the Tempus LX has a “oating” internal power supply, therefore either the positive or nega-
tive output of the DC power source can be referenced to earth ground. This unit will not operate if
the +/- connections are reversed; however it will not be damaged by a reverse connection.
SHOCK/ENERGY HAZARD
Install in Restricted Access Location.
Use 10-14 AWG copper wire only.
Terminal block screw torque: 9 in-lbs (1 nM).
Branch circuit must have circuit breaker, 15A or less.
Install terminal block cover after wiring.
Connecting and Configuring Ethernet
Connect one end of the CAT-5 patch cable supplied with your Tempus LX to the rear panel mounted
RJ-45 connector labeled 10/100BASE-T. Connect the other end of the patch cable to your network
through a ‘straight’ port on your hub. Do not connect it to a ‘crossover’ port on your hub.
By factory default, the Tempus LX will attempt to congure the ethernet interface automatically via
the Dynamic Host Conguration Protocol (DHCP). The Tempus LX will attempt to set the netmask,
its IP address, the IP address of the default gateway, the domain name and the IP addresses of any
nameservers, if the DHCP server is congured to provide them. You may optionally congure the
Tempus LX to also set its hostname via DHCP, if your DHCP server is congured to provide it. You
can do this by running a simple shell script called netconfig after your unit is up on the network.
If your network does use DHCP for host conguration, and you are in a hurry to get your Tempus LX
up and running, you may procede to Verifying Network Conguration to make sure that the network
parameters were set up correctly. Otherwise, it is recommended that you read the following sections
on use of the RS-232 serial I/O port now, since they will help you in debugging any problems that
you may encounter with the automatic conguration via DHCP.
If your network does not use DHCP, you will need to congure your ethernet interface using either
the front-panel keypad or the RS-232 serial I/O port. The following sections contain brief descrip-
tions on how to do that.
Configuring Ethernet with the Front-Panel Keypad
Conguring your ethernet interface with the front-panel keypad is quite simple. After the unit has
powered on, press the ENTER key once or twice until you see a display called Main Menu. Now
press the RIGHT arrow key until the “Network” selection is highlighted. Press ENTER again. You
will see the IP address, gateway and netmask settings displayed here. Press the EDIT key to modify
these settings. The sequence of edit displays will guide you through the setup process. Press the
HELP key at any time to view context-sensitive help information. When you are nished the unit
will reset. Skip to the section called Check Network Operation later in this chapter to continue with
the basic installation procedures.

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Configuring Ethernet with the Serial Port
To congure your ethernet interface with the serial port, after logging in as the root user, you must
run a simple shell script called netconfig from the bash shell prompt. This shell script will prompt
you for the needed information and perform some syntax checking on your inputs. Then it will create
or modify the appropriate les needed to congure the ethernet interface. The following sections will
guide you in setting up communications with the Tempus LX using its RS-232 serial I/O port.
Connect the RS-232 Serial I/O Port
You will need to use the RS-232 serial I/O port if your network does not support the Dynamic Host
Conguration Protocol (DHCP). In that case, you must be able to congure the Tempus LX network
parameters manually using the Linux console shell interface which is provided by this serial I/O port.
Under certain conditions, you may also need to use the RS-232 serial I/O port if you encounter a
problem while upgrading the rmware in your Tempus LX.
To test serial communications with the Tempus LX you will need either a VT100 compatible terminal
or a terminal emulation program running on your computer. We will refer to either of these as “termi-
nal” for the remainder of this instruction.
1. Disconnect power from the Tempus LX.
2. Connect one end of the DB9F-to-DB9F null modem adapter cable to the serial I/O jack on the
Tempus LX.
3. Connect the other end of the DB9F-to-DB9F null modem adapter cable to the terminal. If the
serial I/O port on your terminal does not have a DB9M connector, you may need to use an adapter.
Refer to Chapter 6 - RS-232 Serial I/O Port Signal Definitions for details on the signal wiring. If
you are using a computer for your terminal, remember which port you are using because you will
need to know that in order to set up your terminal software.
Test the Serial Port
You must congure your terminal to use the serial I/O port you used in Connect the RS-232 Serial
I/O Port. You must also congure your terminal to use the correct baud rate, number of data bits,
parity type and number of stop bits. Be sure to turn off any hardware or software handshaking. The
settings for the Tempus LX are:
• 19200 is the Baud Rate
• 8 is the number of Data Bits
• None is the Parity
• 1 is the number of Stop Bits
After conguring these parameters in your terminal, apply power to the Tempus LX. After about 20
seconds, your terminal should display a sequence of boot messages similar to these:
***************************************************
* 6010-0040-000 Linux Bootloader v1.00 08/17/2004 *
***************************************************
Default root file system: FACTORY
To override and boot the UPGRADE partition type ‘UPGRADE’ within 5 seconds...
.....
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