Symmetricom GPS Antenna Installation Instructions Manual

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Symmetricom GPS Antenna Installation Instructions Manual | Manualzz

GPS ANTENNA SETS

I N S T AL L AT I O N I N S T R U C T I O N S

Manual P/N:

Doc. No.:

60500012

001023AD

. . . applicable for

GPS Antenna Sets P/N 8300900x

DISCLAIMER

Symmetricom GmbH provides this manual “as is” without warranty of any kind, either expressed or implied, including, but not limited to the implied warranties of merchantability and fitness for a particular purpose. Symmetricom GmbH may make improvements and/or change in the product(s) and or the program(s) described in this manual at any time and without notice.

This publication could contain technical inaccuracies or typographical errors. Changes are periodically made to the information herein; these changes will be incorporated in new editions of this publication.

If there are comments, please address them to the Service department of Symmetricom GmbH (address shown on the back cover).

Symmetricom may use or distribute any of the information you supply in any way it believes appropriate without incurring any obligations whatever.

WARRANTY

Symmetricom GmbH warrants for one year after delivery to the original purchaser of any product manufactured by

Symmetricom GmbH, that same shall be free of defects in material and workmanship. Obligation under this warranty shall be limited to repair or replacement, at Symmetricom GmbH's discretion, of any product or part thereof which has been returned by the original purchaser with transportation prepaid, and upon examination by Symmetricom GmbH, is found to be defective. Symmetricom GmbH assumes no responsibility for loss or damage to equipment being returned for repair or replacement under the terms of this warranty.

For this warranty to be effective, the purchaser agrees that the equipment will be properly installed and maintained.

Equipment which, upon examination by Symmetricom GmbH, requires repair or replacement of parts thereof as a result of improper installation, misuse, unauthorized alterations or repairs, or user negligence, such repairs or replacement of parts thereof will be made at cost.

Symmetricom GmbH makes no representation or warranty of any kind, either expressed or implied, with respect to equipment operation and procedures. Any action that the user may take in reliance upon the operation or accuracy of this equipment shall be taken solely upon the user's own responsibility and risk.

Symmetricom GmbH shall not be liable for consequential damages to purchaser, user, or any others resulting from the possession or use of this equipment.

Prior to return of a product under terms of this warranty, Symmetricom GmbH is to be notified. Notification is to include the model number and serial number of the product and full details of the problem.

PROPRIETARY RIGHTS

The information and/or drawings set forth in this document and all rights in and to inventions disclosed herein which might be granted thereon disclosing or employing the materials, methods, techniques or apparatus described herein, are the exclusive property of Symmetricom GmbH.

COPYRIGHT NOTICE

 2003 Symmetricom GmbH, Printed in Germany

All rights reserved. This publication or parts thereof may not be reproduced in any form without the written permission of the publisher.

TRADEMARK NOTICE

All other marks are the property of their respective owners.

ii

GPS Antenna Sets

CHANGE RECORD

Revision Issued Para. Subject of Change

Change Record

AB 05/2000

AC 07/2000

All Connector for H2000 cable and lightning protection added

1 Cable length for RG213 changed

Remarks

001023AD – July 2003 iii

GPS Antenna Sets

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GPS Antenna Sets

Table of Contents

TABLE OF CONTENTS

1.

How to Use This Manual ............................................................. 1

1.1.

Purpose of this Document ............................................................................. 1

1.2.

Structure of this Document............................................................................ 1

1.3.

Who Should Read This Document ................................................................ 2

1.4.

Related Documentation .................................................................................. 2

1.5.

Conventions .................................................................................................... 2

1.5.1.

Acronyms and Abbreviations ................................................................ 2

1.5.2.

Typographical Conventions................................................................... 2

1.5.3.

Warnings, Cautions, Recommendations and Notes ............................. 2

1.6.

Where to Find Answers to Product and Document Questions................... 3

2.

Description of the Parts .............................................................. 5

2.1.

GPS Antenna ................................................................................................... 5

2.2.

Mounting Device ............................................................................................. 5

2.3.

Antenna Cables and Connectors................................................................... 5

2.4.

Lightning Protection ....................................................................................... 5

2.5.

Grounding Kit .................................................................................................. 6

2.6.

Technical Data................................................................................................. 6

3.

Unpacking and Inspection.......................................................... 7

3.1.

Unpacking........................................................................................................ 7

3.2.

Inspection ........................................................................................................ 7

4.

Installation of the GPS Antenna................................................. 9

4.1.

Selection of a Suitable Location.................................................................... 9

4.2.

Mast Mounting............................................................................................... 10

4.2.1.

Pre-Assembly of the Mounting Fixture ................................................ 10

4.2.2.

Fixing of the Mounting Tube................................................................ 10

4.3.

Wall Mounting................................................................................................ 11

4.3.1.

Pre-Assembly of the Mounting Fixture ................................................ 11

4.3.2.

Fixing of the Mounting Tube................................................................ 11

4.4.

Assembly of the GPS Antenna .................................................................... 12

5.

Assembly of the Antenna Cable and the Connector.............. 13

5.1.

Antenna Cable and Connector..................................................................... 13

5.2.

Preparation of the Antenna Cable ............................................................... 14

5.3.

Assembly of the Connector ......................................................................... 14

6.

Installation of the Lightning Protector .................................... 15

6.1.

Mounting of the Lightning Protector........................................................... 15

6.2.

Connection of the Lightning Protector ....................................................... 15

001023AD – July 2003 v

GPS Antenna Sets

Table of Contents

7.

Installation of the Grounding Kit ............................................. 17

7.1.

Mounting the Grounding Kit ........................................................................ 17

7.2.

Connection of the Grounding Kit ................................................................ 17

8.

Repacking and Return .............................................................. 19

8.1.

Return Procedure ......................................................................................... 19

8.2.

Repacking...................................................................................................... 19

A.

Procurement Information ......................................................... 21

A.1.

GPS Antenna Sets ........................................................................................ 21

A.2.

GPS Antenna and Mounting Device............................................................ 21

A.3.

Antenna Cables............................................................................................. 22

A.4.

Connectors.................................................................................................... 22

A.5.

Lightning Protection..................................................................................... 22

A.6.

Grounding Kit................................................................................................ 22

Glossary ............................................................................. Glossary–1

vi

GPS Antenna Sets

How to Use This Manual

1. How to Use This Manual

1.1. Purpose of this Document

This Installation Instruction provides necessary information for installation of a GPS antenna, the antenna cable and associated mounting parts. Additionally it includes installation instructions concerning lightning protection of the connected GPS receiver.

Furthermore it contains repacking and return procedures and procurement information.

1.2. Structure of this Document

This document contains the following sections and appendixes:

Chapter Title of the Chapter

1

2

3

4

5

6

7

8

Description

How to Use This Manual

Contains a general overview of this document, the intended audience, the conventions used, and lists related documents available for the user.

Description of the Parts

Provides a brief description of the parts and lists important technical data.

Unpacking and Inspection

Contains procedures for unpacking and inspecting the delivered parts.

Installation of the GPS

Antenna

Contains instructions for installing the GPS antenna.

Assembly of the Antenna

Cable and the Connector

Describes the assembly procedure of different connectors used for different types of antenna cables.

Installation of the Lightning

Protection

Installation of the Grounding

Kid

Repacking and Return

Contains instructions for installing the lightning protection.

Contains instructions for installing the grounding kit.

Contains repacking and return.

Lists necessary procurement information to purchase a GPS antenna and parts associated to it.

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GPS Antenna Sets

How to Use This Manual

1.3. Who Should Read This Document

This publication is written for technical audiences. It describes instructions for installation as well as technical details primarily intended for qualified technical personnel.

If additional documentation of the original manufacturer of the parts is available, it is included in the delivery package.

At time of issue of this document no further documentation related to the parts described herein are published. See our web-site www.symmetricom.com

for a complete list of actual documentation.

1.5. Conventions

1.5.1. Acronyms Abbreviations

Terms are spelled out the first time they appear in text. Thereafter, the acronym or abbreviation is used. In addition, the glossary defines the acronyms and abbreviations.

1.5.3.

When text appears this way...

... it means:

Installation

Symmetricom does not recommend...

The title of a document or the title of a chapter

A word or term given special emphasis.

Warnings, Cautions, Recommendations and Notes

Warnings, Cautions, Recommendations and Notes attract attention to essential or critical information in this document. The types of information in each are explained in the following:

Warning

To avoid serious personal injury or death, do not disregard warnings.

All warnings use this symbol. Warnings are installation, operation, or maintenance procedures, practices, or statements, that if not strictly observed, may result in serious personal injury or even death.

Caution

To avoid personal injury, do not disregard cautions. All cautions use this symbol. Cautions are installation, operation, or maintenance procedures, practices, conditions, or statements, that if not strictly observed, may result in damage to, or destruction of, the equipment.

Cautions are also used to indicate a long-term health hazard.

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GPS Antenna Sets

How to Use This Manual

1.6.

ESD Caution

To avoid personal injury and electrostatic discharge (ESD) damage to equipment, do not disregard ESD cautions. All ESD cautions use this symbol. ESD cautions are installation, operation, or maintenance procedures, practices, conditions, or statements that if not strictly observed, may result in possible personal injury, electrostatic discharge damage to, or destruction of, static sensitive components of the equipment.

Electrical Shock Caution

To avoid electrical shock and possible personal injury, do not disregard electrical shock cautions. All electrical shock cautions use this symbol. Electrical shock cautions are practices, procedures, or statements, that if not strictly observed, may result in possible personal injury, electrical shock damage to, or destruction of components of the equipment.

Recommendation

All recommendations use this symbol. Recommendations indicate manufacturer-tested methods or known functionality.

Recommendations contain installation, operation, or maintenance procedures, practices, conditions, or statements, that provide important information for optimum performance results.

Note

All notes use this symbol. Notes contain installation, operation, or maintenance procedures, practices, conditions, or statements, that alert you to important information, which may make your task easier or increase your understanding.

Where to Find Answers to Product and Document Questions

For additional information about the parts described in this guide, please contact your

Symmetricom representative or our service office.

We appreciate your suggestions of ways to improve any part of this guide. Please make your suggestions on a copy of the concerned page and send it to us.

001023AD – July 2003 3

How to Use This Manual

GPS Antenna Sets

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4 001023AD – July 2003

GPS Antenna Sets

2. Description of the Parts

Description of the Parts

The supplied GPS antenna is an active antenna, especially designed for GPS timing applications. The housing is specially constructed to withstand continuous, long-term exposure to rugged or highly corrosive environments.

The antenna receives the satellites signals (GPS frequency: 1575.42 MHz) and passes it trough a narrow band pass filter and a preamplifier. The GPS antenna will be supplied with 5 V DC from the GPS receiver unit by the coaxial cable, witch also conducts the GPS signal to the GPS receiver unit. The antenna is terminated with an “N” female connector.

2.3.

The kit for mast mounting consist of a 300 mm metal tube, one mounting fixture, two clamps, four brackets and attaching parts. With the Symmetricom mounting device the

GPS antenna can be mounted on a mast with a diameter up to 60 mm or at a wall.

If wall mounting is applicable, the mounting fixture and the clamps can be used while attaching parts are not included.

Antenna Cables and Connectors

For connection between antenna and GPS receiver unit (e.g. GPS LC) different coaxialcables are provided to be used. Dependent on the distance between GPS antenna and

GPS receiver unit different coaxial cables must be used. The difference of the cables are cable diameter and insertion loss (see technical data). Each cable has an impedance of

50 Ω.

Because of the different cable diameter different N-type connectors must be used. At the antenna only the straight N- type connector can be used and at the unit both, the straight and the right-angle type of N- type connector can be used.

To protect the GPS receiver unit to be damaged by lightning strokes, a surge protector should be installed. Surge protectors remove transient current that may induced onto the inner conductor of coaxial cables.

To protect the GPS receiver unit, the surge protector should be installed as close as possible to the GPS receiver unit. To proof a proper work of the surge protector it is very important that the surge protector is grounded to a low impedance ground.

001023AD – July 2003 5

GPS Antenna Sets

Description of the Parts

Lightning transients can also be conducted via the outer conductor of an coaxial cable. To protect the GPS receiver unit from become damaged from this transients, a grounding kit can be attached along the coaxial cable and grounded to a low impedance ground (e.g. bus bar) to lead the transients to earth.

During the installation of the grounding kit, it must be taken care to avoid nicking of the copper conductor and the grounding kit connection must be kept dry to prevent corrosion which reduces effectiveness. The weather-proofing materials, which should be part of each grounding kit, must be properly applied.

GPS Antenna

Color White

Weight 0.16 kg Nominal

RF Input Type N connector, female

Operating Temperature

Humidity

Frequency

Impedance

DC Voltage

DC Current @ 5V

Wind Load

-40 degrees C. to +85 degrees C.

95% relative Humidity

1575.42 +/- 10.0 MHz (GPS L1)

50 Ohms Nominal

5 to 26 VDC

37 mA TYP, 45mA Max (50dB)

7.05 N @ 120 km/h

9.68 N @ 140 km/h

12.7 N @ 160 km/h

RG 58

RG 213

LowLoss

LCF ½ “

CABLE INSERTION LOSS (typically)

0,75 dB/m @1575 MHz

0,3333 dB/m @ 1575 MHz

0,1736 dB/m @ 1575 MHz

0,094 dB/m @ 1575 MHz

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GPS Antenna Sets

Unpacking and Inspection

3. Unpacking and Inspection

This chapter contains recommended procedures for unpacking the delivered parts. It also lists instructions for inspection the delivered items for correct condition and completeness.

3.1. Unpacking

(1) Open the package.

(2) Remove the upper protection material

(3) Remove all parts. Check the shipping container for loose parts.

Recommendation

Keep all packaging materials in the event the equipment or components must be returned or shipped to another location.

3.2. Inspection

(1) Check the items against packing list.

(2) Inspect the items for shipping damage, including bent or loose parts, broken connectors, or other visible defects.

(3) Notify Symmetricom GmbH and the carrier who delivered the equipment if you suspect that it was damaged in transit.

001023AD – July 2003 7

Unpacking and Inspection

GPS Antenna Sets

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8 001023AD – July 2003

GPS Antenna Sets

Installation of the

GPS Antenna

4. Installation of the GPS Antenna

This chapter provides procedures to be performed when installing a GPS antenna

4.1. Selection of a Suitable Location

GPS signals don’t penetrate walls, roofs, solid metal structures or dense foliage. Tracking more satellites improves the GPS system performance. Typically at least 4 satellites are needed for start-up and at least 1 satellite continuously. For best results select an outdoor location providing as much unobstructed view to the sky as possible. Obstructions not rising more than 10° above the horizon can be ignored. Since the moving GPS satellites don’t cross the polar regions view towards the earth’s equator is preferable. Hence, in the northern hemisphere (Europe, North America, most of Asia) the sector E-S-W must be considered while in the southern hemisphere (Australia, South America) it’s W-N-E.

Rooftop mounting is ideal. Wall mounting may be acceptable, particulary at higher levels.

The figure shows different location options and their pros and cons are discussed below.

Position 1: Few obstructions towards the important region. Potential to track up to 8 satellites.

Best results.

Position 2: Some obstructions. Potential to track 4 to 6 satellites. Reasonable results.

Position 3: Many obstructions. Potential to track 1 to 4 satellites. Depending on time of day

(satellite constellation) start-up may be delayed significantly. Marginal results.

Position 4: GPS satellite signal blocked almost completely. Potential to track up to 2 satellites. No performance.

Lightning protection may be important. If the desired location is not within the area protected against direct strikes the building’s protection system must be modified accordingly. Local building codes may apply.

001023AD – July 2003 9

Installation of the

GPS Antenna

GPS Antenna Sets

4.2.1.

4.2.2.

Pre-Assembly of the Mounting Fixture

Install the mounting fixture at the upper end of the mast by putting two mounting brackets around the mast.

Fix it by using four plain washers and four nuts. (see sketch beside)

Fixing of the Mounting Tube

mounting fixture mounting bracket mast diameter

28 mm ... 60 mm

Install the mounting tube at the mounting fixture by using the clamp putting the other two mounting brackets around the mounting tube. Fix it by using four spacers and four nuts. (see sketch beside) mounting-tube mounting

brackets antenna-mast

(from customer) clamps

2 x spacer

10 001023AD – July 2003

GPS Antenna Sets

4.3.1. Pre-Assembly of the Mounting Fixture

Fix the mounting fixture with four suitable screws on the wall.

(see sketch beside)

mounting fixture

4.3.2. Fixing of the Mounting Tube

Fix the mounting tube with clamps by means of suitable long screws on the mounting fixture/wall.

(see sketch beside)

clamps wall mounting tube

Installation of the

GPS Antenna

001023AD – July 2003 11

Installation of the

GPS Antenna

4.4.

GPS Antenna Sets

Assembly of the GPS Antenna

Install the antenna base on the mounting tube and fasten it.

Feed the antenna cable through the mounting tube (bottom to top).

Assemble the connector according chapter 5. of this manual.

Connect the antenna cable to the GPS antenna.

Assemble the GPS antenna to the antenna base by fastening the four screws. antenna-top

N-connector antenna-base mounting-tube antenna-cable

12 001023AD – July 2003

GPS Antenna Sets

Assembly of the Antenna

Cable and the Connector

5. Assembly of the Antenna Cable and the Connector

This chapter provides principal assembly instruction to put the connector onto the corresponding antenna cable. Furthermore describes the specific features of the individual connectors to be considered.

5.1. Antenna Cable and Connector

Typically an antenna cable consists of:

1 inner conductor

2 dielectric

3 braid

4 jacket

Typically a connector consists of the following parts as shown at the sketch below:

1 Front Isolator

2 Contact Pin

3 Rear Isolator

4 Bush or Ring (optional)

1 2 3 4 5 6 7 8

5 Braid Clamp

6 Gasket

7 Washer (optional)

8 Hex Nut

9 Main Body or Housing

9

001023AD – July 2003 13

14

Assembly of the Antenna

Cable and the Connector

5.2.

GPS Antenna Sets

Preparation of the Antenna Cable

Usually the connectors are assembled as follows:

Slide the hex nut, washer and gasket onto the antenna cable one by one.

Strip the antenna cable (inner conductor, dielectric, braid and jacket) as follows:

5.3.

c b a

Combination cable - connector

Connector for cable type RG58, straight

Connector for cable type RG213, straight

Connector for cable type RG213 and Low

Loss, angle

Connector for cable type LowLoss, straight

a jacket strip length

8,5

13

b conductor strip length

5,5

6,5

c braid strip length

5,5

6,5

19,0 5,5 3

6,4 6 6

Assembly of the Connector

Place the braid clamp over braid and push back against cable. Fold back braid wire.

Slide ring and rear isolator against the braid clamp

Insert inner conductor of the cable into the contact and solder it.

Insert front isolator together with cable and parts into the main body, screw the hex nut until it is tightened

001023AD – July 2003

GPS Antenna Sets

Installation of the

Lightning Protector

6. Installation of the Lightning Protector

This chapter provides principal instructions to install a lightning protector in the line between GPS antenna and GPS receiver unit.

Warning

Do not install the lightning protector in the presence of thunderstorms. Failure to obey this warning may result in injury or death to you or to others.

Note

For further information refer to manufacturer’s installation instructions enclosed to the lightning protector.

6.1.

6.2.

Mounting of the Lightning Protector

Mount the lightning protector at the customers high voltage eliminator (if suitable use separate angle).

Connection of the Lightning Protector

GPS Antenna

Keep a loop near by antenna

Outside

N-Connector

Antenna cable

Lightning protector

for inhouse installation only have to be connected to next grounding bar.

Best place just before cable is leaving the house.

Unit

001023AD – July 2003 15

Installation of the

Lightning Protector

GPS Antenna Sets

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16 001023AD – July 2003

GPS Antenna Sets

7. Installation of the Grounding Kit

Installation of the

Grounding Kit

This chapter provides principal instructions to install a grounding kit in the line between

GPS antenna and the building.

Warning

Do not install the grounding kit in the presence of thunderstorms.

Failure to obey this warning may result in injury or death to you or to others.

Note

For further information refer to manufacturer’s installation instructions enclosed to the grounding kit.

7.1.

7.2.

Mounting the Grounding Kit

It is recommended to mount a grounding kit at the antenna cable every 60 m. At least one has to be installed close to the antenna and one at the entry point of the building.

Connection of the Grounding Kit

When correctly mounted at the antenna cable one and of the grounding cable is already connected to cable shield.

Connect the grounding lug of the cable to the customers high voltage eliminator.

Grounding Kit

This is an example only. Antenna position may be also an roof or wall mounting pipes.

001023AD – July 2003 17

Installation of the

Grounding Kit

GPS Antenna Sets

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18 001023AD – July 2003

GPS Antenna Sets

8. Repacking and Return

This chapter contains repacking and return procedures.

Repacking and Return

To return the unit to the manufacturer for repair, use the following instructions:

(1) Contact the service department of Symmetricom GmbH (see back cover of this document) to announce the repair/service case before returning the product.

(2) Follow the procedure provided by the service department.

8.2. Repacking

The unit is portable and may be carried unpacked at normal environmental conditions.

Use standard packing procedures to protect the unit during shipment. Custom foam packing material is preferred because it conforms to the shape of the instrument.

Recommendation

Use transport case and original packing materials in the event the unit must be returned or shipped to another location.

001023AD – July 2003 19

Repacking and Return

GPS Antenna Sets

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20 001023AD – July 2003

GPS Antenna Sets

Procurement Information

A.1.

A.2.

This appendix provides information needed to procure GPS antenna and antenna cable including associated connectors and mounting parts as well as lightning protection.

For further information than outline herein and for ordering please contact Marketing/Sales of Symmetricom GmbH.

Symmetricom GmbH

Marketing/Sales

Fichtenstrasse 25

D-85649 Hofolding / Munich

Germany

Phone: +49 – 8104-6624-29

Fax: +49 – 8104-6624-28 e-mail: [email protected] web: www.symmetricom.com

Please provide the parts name together with the part number when ordering.

GPS Antenna Sets

An antenna set includes a GPS antenna, the antenna cable with the chosen length, 2 connectors and the mounting device with attachment parts.

Type of cable and available length

RG58 / 25 m

RG213/50 m

RG213/75 m

RG213/100 m

LowLoss/150 m

LowLoss/200 m

LCF ½ “ /250 m

Part Number

83009002

83009003

83009004

83009005

83009006

83009007

83009008

GPS Antenna and Mounting Device

Name of the Component

GPS Antenna

Mounting device for Antenna

Part Number

23120015

44301802

001023AD – July 2003 21

GPS Antenna Sets

Procurement Information

Please order the cable per meter needed.

Type of the cable Part Number

RG58 36000010

RG213 36000030

LowLoss 36000055

LCF ½ ” 36000060

A.4. Connectors

Name of the Component

Connector for cable type RG58, straight

Connector for cable type RG213, straight

Connector for cable type RG213 and Low Loss, angle

Connector for cable type LowLoss, straight

Connector for cable type LCF ½ ” , straight

Part Number

13113006

13113000

13113002

13113013

13113009

An Lightning Protection includes a Hardware kit and 2 necessary connectors

Name of the Component

Lightning Protector for cable type RG58

Lightning Protector for cable type RG213

Lightning Protector for cable type LowLoss

Part Number

83009025

83009024

83009023

Name of the Component

Grounding Kit for cable type RG58/RG213

Part Number

36102045

22 001023AD – July 2003

EC

EN

ESD

GPS

Hz

N

RG

VA

VAC

VDC

001023AD – July 2003

GPS Antenna Sets

Glossary

GLOSSARY

(ONLY NON-STANDARD ABBREVIATIONS ARE LISTED)

European Council

Europäische Norm

Abbreviation for German expression of European Standard

Electro Static Discharge

The rapid, spontaneous transfer of electrostatic charge induced by a high electrostatic field.

Global Positioning System

(satellite navigation system)

A satellite-based global navigation system that consists of (a) a constellation of

24 satellites in orbit 18 000 km above the Earth, (b) several on-station (i.e., inorbit) spares, and (c) a ground-based control segment. The satellites transmit signals that are used for extremely accurate three-dimensional (latitude, longitude, and elevation) global navigation (position determination), and for the dissemination of precise time.

Hertz

A unit of frequency equal to one cycle per second (cps.).

One kilohertz (kHz) equals 1000 cps;

One megahertz (MHz) equals 1 million cps;

One gigahertz (GHz) equals 1 billion cps.

Navy Connector

Coaxial Connector with screw type coupling mechanism. Available in 50 Ohm and 75 Ohm versions. Frequency range DC – 18GHz (50 Ohm) and 1 GHz (75

Ohm) respectively.

Symbol used to designate coaxial cables that are made to Government

Specification

e.g., RG58-U, in this designation the “R” means radio frequency, the “G” means Government, the “58” is number assigned to the government approval, and the “U” means it is an universal specification.

Voltage Ampere

The unit of electrical apparent power. In alternating-current power systems, the product of the rms voltage and amperage.

Volts, Alternating Current

The unit of electromotive force

Volts, Direct Current

The unit of electromotive force

Glossary –1

Glossary

Installation Instructions

GPS Antenna Sets

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Glossary–2 001023AD – July 2003

Symmetricom GmbH

Fichtenstrasse 25

D-85649 Hofolding / Munich

Germany

www.symmetricom.com

Service/Support

Sales

Phone: +49 – 700-328864357

Fax: +49 – 8104-6624-33 e-mail: [email protected]

Phone: +49 – 8104-6624-29

Fax: +49 – 8104-6624-28 e-mail: [email protected]

Symmetricom GmbH All rights reserved.

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