COMMUNICATIONS SERVICE MONITOR
2948B
Operating Manual
Document part no. 46892/692
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COMMUNICATIONS SERVICE MONITOR
2948B
Aeroflex International Ltd. 2007
No part of this document may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopying,
or recorded by any information storage or retrieval system, without permission in writing by Aeroflex International Ltd.
(hereafter referred to throughout the document as Aeroflex).
Printed in the UK
Manual part no. 46882/692 Issue 2
4 September 2007
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About this manual This manual explains how to use the Communications Service Monitor 2948B. It applies to instruments fitted with main software version 5.xx or later and cellular software version 5.xx.
Intended audience People who need to test mobile radio systems and associated equipment. People who need to test airborne avionics receivers.
Structure Chapter 1
General information and performance specification.
Chapter 2 Gives installation instructions, including connection of peripheral equipment.
Chapter 3 Operating instructions. Setting up and use.
Chapter 4 Brief technical description.
Chapter 5 Acceptance testing procedure for the Service Monitor.
Appendix A Use of the Directional Power Heads, 54421/002 and 54421/003.
Appendix B Operating instructions for Avionics system testing.
Document conventions The following conventions apply throughout this manual:- [Tx TEST] Hard key titles are shown verbatim, using normal lettering in
square brackets. [Tx freq] Soft key titles are shown verbatim using italic lettering in square
brackets. RF IN/OUT Titles on the instrument panels are shown verbatim using capital
letters. Text displayed on screen. See below
References to text displayed on the screen of the Service Monitor are given verbatim, using a font that resembles the displayed text. e.g. GEN FREQ: , Ref Level: , Ref.Level:
contd./...
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About this manual (continued)
Associated publications Other manuals that cover specific aspects of this service monitor are:- Programming manual (46882/683) provides programming information for remote
control of the Service Monitor using MI-BASIC and GPIB. Maintenance Manual (46882/694) provides servicing information for the
Communications Service Monitor 2948B.
Operating manual supplements provide operating details for specific system test software. AMPS Supplement (46882/313) EDACS Radio Supplement (46882/301) EDACS Repeater Supplement (46882/300) MPT1327 Supplement (46882/317) NMT Supplement (46882/316) PMR Supplement (46882/315) TACS Supplement (46882/314)
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Contents
PRECAUTIONS.......................................................................................................................... v
Chapter 1 GENERAL INFORMATION ................................................................................................. 1-1 Performance data....................................................................................................... 1-7
Chapter 2 INSTALLATION ..................................................................................................................... 2-1
Chapter 3 LOCAL OPERATION............................................................................................................. 3-1 Using the test modes................................................................................................. 3-16
Chapter 4 TECHNICAL DESCRIPTION ............................................................................................... 4-1
Chapter 5 ACCEPTANCE TESTING ..................................................................................................... 5-1 Acceptance Test Results Tables .............................................................................. 5-31
Appendix A DIRECTIONAL POWER HEADS........................................................................................ A-1
Appendix B AVIONICS SYSTEM.............................................................................................................. B-1 Avionics system overview ......................................................................................... B-2 Avionics system operation ........................................................................................ B-7
INDEX............................................................................................................................... Index-1
PRECAUTIONS
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Precautions
These terms have specific meanings in this manual:
WARNING information to prevent personal injury. information to prevent damage to the equipment. important general information.
Hazard symbols The meaning of hazard symbols appearing on the equipment and in the documentation is as follows:
Symbol Description
Refer to the operating manual when this symbol is marked on
the instrument. Familiarize yourself with the nature of the hazard and the actions that may have to be taken.
Dangerous voltage
Toxic hazard
Hot surface
General conditions of use This product is designed and tested to comply with the requirements of IEC/EN61010-1 Safety requirements for electrical equipment for measurement, control and laboratory use, for Class I portable equipment and is for use in a pollution degree 2 environment. The equipment is designed to operate from an installation category I or II supply. Equipment should be protected from the ingress of liquids and precipitation such as rain, snow, etc. When moving the instrument from a cold to a hot environment, it is important to allow the temperature of the instrument to stabilise before it is connected to the supply to avoid condensation forming. The instrument must only be operated within the environmental conditions specified in Chapter 1 Performance Data in the Operating/Instruction manual. This product is not approved for use in hazardous atmospheres or medical applications. If the equipment is to be used in a safety-related application, e.g. avionics or military applications, the suitability of the product must be assessed and approved for use by a competent person.
WARNING Electrical hazards (AC supply voltage)
This equipment conforms with IEC Safety Class I, meaning that it is provided with a protective grounding lead. To maintain this protection the supply lead must always be connected to the source of supply via a socket with a grounded contact. Be aware that the supply filter contains capacitors that may remain charged after the equipment is disconnected from the supply. Although the stored energy is within the approved safety requirements, a slight shock may be felt if the plug pins are touched immediately after removal.
Do not remove instrument covers as this may result in personal injury. There are no user-serviceable parts inside.
Refer all servicing to qualified personnel. See list of Service Centers at rear of manual.
PRECAUTIONS
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Fuses Note that the internal supply fuse is in series with the live conductor of the supply lead. If connection is made to an unpolarized supply socket, it is possible for the fuse to become transposed to the neutral conductor, in which case, parts of the equipment could remain at supply potential even after the fuse has ruptured.
WARNING Fire hazard
Make sure that only fuses of the correct rating and type are used for replacement. If an integrally fused plug is used on the supply lead, ensure that the fuse rating is commensurate with the current requirements of this equipment. See under 'Performance Data' in Chapter 1 for power requirements.
WARNING
Toxic hazards Some of the components used in this equipment may include resins and other materials which give off toxic fumes if incinerated. Take appropriate precautions, therefore, in the disposal of these items.
WARNING
Lithium A Lithium battery (or a Lithium battery contained within an IC) is used in this equipment: As Lithium is a toxic substance, the battery should in no circumstances be crushed, incinerated or disposed of in normal waste. Do not attempt to recharge this type of battery. Do not short circuit or force discharge since this might cause the battery to vent, overheat or explode.
WARNING
Beryllium copper Some mechanical components within this instrument are manufactured from beryllium copper. This is an alloy with a beryllium content of approximately 5%. It represents no risk in normal use. The material should not be machined, welded or subjected to any process where heat is involved. It must be disposed of as special waste. It must NOT be disposed of by incineration.
WARNING Hot Surfaces
Take care when touching the RF Input Type N connector after the application of high levels of continuous power. If 50 W is exceeded for a prolonged period, the temperature of the connector can become excessive.
WARNING RF hazard
When measuring high VSWR ratios, hazardous voltages may be present on the line due to standing
