Operating Manual for COMMUNICATIONS …

1 ContainsOperating ManualforCOMMUNICATIONSSERVICE MONITOR2945 APart number 46882-311 DIssue 4 Creation date 11-Nov-9946882-311 DiCOMMUNICATIONSSERVICE MONITOR2945A IFR Ltd. 1999No part of this book may be reproduced or transmitted in any formor by any means, electronic or mechanical, including photocopying,or recorded by any information storage or retrieval system, withoutpermission in writing by IFR in the UKManual part no. 46882-311 DIssue 411 November 1999ii46882-311 DAbout this manualThis Manual explains how to use the COMMUNICATIONS Service monitor 2945A. It applies toinstruments fitted with main software version and cellular software version audiencePeople who need to test mobile radio systems and associated 1 General information and performance 2 Gives installation instructions, including connection of peripheral 3 Operating instructions. Setting up and 4 Brief technical 5 Acceptance testing procedure for the Service AUse of the Directional Power Heads, 54421/002 and 54421 BUse of the Light-weight Directional Power Heads 54421/016 and 54421 conventionsThe following conventions apply throughout this Manual :-[Tx TEST]Hard key titles are shown verbatim, using normal lettering insquare brackets.

2 [Tx freq]Soft key titles are shown verbatim using italic lettering in IN/OUTT itles on the instrument panels are shown verbatim using 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. GEN FREQ: , Ref Level: , 0 G+ :Associated publicationsOther manuals that cover specific aspects of this service monitor are:- Programming Manual (46882-318B) provides programming information for remotecontrol of the Service monitor using MI-BASIC and GPIB. Maintenance Manual (46882-310W) provides servicing information for theCommunications Service monitor 2945A and Avionics communication ServiceMonitor this Manual (continued)Associated publications (continued) Operating Manual supplements provide Operating details for specific system test software. EDACS Repeater (46882-300N) AMPS Supplement (46882-313P) PMR Supplement (46882-315M) MPT1327 Supplement (46882-317R) EDACS Radio Supplement (46882-301L) TACS Supplement (46882-314X) NMT Supplement (46882-316C)iv46882-311 DContentsPrecautions.

3 VChapter 1 GENERAL 1-1 Performance data .. 1-7 Chapter 2 INSTALLATION .. 2-1 Chapter 3 LOCAL 3-1 Using the test modes .. 3-15 Chapter 4 TECHNICAL DESCRIPTION .. 4-1 Chapter 5 ACCEPTANCE 5-1 Acceptance Test Results Tables .. 5-30 Appendix A DIRECTIONAL POWER A-1 Appendix B LIGHT-WEIGHT DIRECTIONAL POWER terms have specific meanings in this Manual :WARNING information to prevent personal to prevent damage to the general symbolsThe meaning of hazard symbols appearing on the equipment is as follows:SymbolDescriptionGeneral hazardDangerous voltageToxic hazardHot surfaceGeneral conditions of useThis product is designed and tested to comply with the requirements of IEC/EN61010-1 Safetyrequirements for electrical equipment for measurement, control and laboratory use , for Class Iportable equipment and is for use in a pollution degree 2 environment. The equipment is designedto operate from an installation category I or II should be protected from the ingress of liquids and precipitation such as rain, snow, moving the equipment from a cold to a hot environment, it is important to allow thetemperature of the equipment to stabilise before it is connected to the supply to avoid condensationforming.

4 The equipment must only be operated within the environmental conditions specified inChapter 1 Performance data , otherwise the protection provided by the equipment may product is not approved for use in hazardous atmospheres or medical applications. If theequipment is to be used in a safety-related application, avionics or military applications, thesuitability of the product must be assessed and approved for use by a competent Electrical hazards (AC supply voltage)This equipment conforms with IEC Safety Class I, meaning that it is provided with a protectivegrounding lead. To maintain this protection the supply lead must always be connected to thesource of supply via a socket with a grounded aware that the supply filter contains capacitors that may remain charged after the equipment isdisconnected from the supply. Although the stored energy is within the approved safetyrequirements, a slight shock may be felt if the plug pins are touched immediately after not remove covers, no user serviceable parts inside.

5 See list of IFR Ltd International ServiceCentres at rear of that the internal supply fuse is in series with the live conductor of the supply lead. Ifconnection is made to a 2-pin unpolarized supply socket, it is possible for the fuse to becometransposed to the neutral conductor, in which case, parts of the equipment could remain at supplypotential even after the fuse has Fire hazardMake sure that only fuses of the correct rating and type are used for an integrally fused plug is used on the supply lead, ensure that the fuse rating is commensuratewith the current requirements of this equipment. See under Performance Data in Chapter 1 forpower Toxic hazardsSome of the components used in this equipment may include resins and other materials which giveoff toxic fumes if incinerated. Take appropriate precautions, therefore, in the disposal of LithiumA 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 ordisposed of in normal not attempt to recharge this type of battery.

6 Do not short circuit or force discharge since thismight cause the battery to vent, overheat or Beryllium copperSome mechanical components within this instrument are manufactured from beryllium is an alloy with a beryllium content of approximately 5%. It represents no risk in normal material should not be machined, welded or subjected to any process where heat is must be disposed of as special waste .It must NOT be disposed of by Lead-acid battery packBattery usageA lead-acid battery pack is supplied with the instrument as an accessory. This contains both leadand sulphuric acid. Lead is a toxic substance and sulphuric acid is corrosive and a skin irritantwhich can cause chemical burn damage to exposed skin. The battery pack should in nocircumstances be disposed of in normal Manual 2945A46882-311 DviiDo not charge at an ambient temperature of greater than 40 not dispose of in a fire.

7 Do not short circuit. Do not crush, puncture, open, dismantle orotherwise mechanically interfere with. Do not store at temperatures in excess of 60 observe the correct polarity and connect normal service, small quantities of hydrogen and oxygen may be vented from the batterypack. Adequate ventilation must be provided around the instrument to allow these gases todisperse battery pack must only be charged using the charging facility in the instrument, or by using anapproved sealed lead-acid battery normal End of Life condition is reached when capacity of the battery pack falls to 50% of itsrated capacity. This is shown in the performance specification in Chapter 1 of this Manual . Batterypacks should be withdrawn from service when this condition is storageAny sealed lead-acid battery naturally self-discharges when in storage. Its service life and capacitymay be adversely affected if it becomes over-discharged.

8 Refer to the performance specification inChapter 1 of this Manual for storage time and battery packs should be periodically Top Charged to optimize performance and service Top Charging , the open circuit voltage must be measured, and if this is below theminimum shown in the performance specification in chapter 1 of this Manual , the battery pack mustnot be Hot SurfacesTake care when touching the RF Input Type N connector after the application of high levels ofcontinuous power. If 50 W is exceeded for a prolonged period, the temperature of the connectorcan become RF hazardWhen measuring high VSWR ratios, hazardous voltages may be present on the line due to standingwaves. Under these conditions, it is dangerous to operate the equipment with the covers Tilt facilityWhen the equipment is in the tilt position, it is advisable, for stability reasons, not to stack otherequipment on top of 1 GENERAL INFORMATIONC ontentsPurpose and features.

9 1-2 Transmitter testing .. 1-2 Receiver testing .. 1-3 Duplex 1-4 Systems testing .. 1-5 Spectrum 1-5AF testing .. 1-6 Performance 1-7 Receiver measurements ..1-7 Audio 1-8 Transmitter measurements .. 1-10RF spectrum analyzer ..1-11 Tracking 1-12 Audio 1-12 General features .. 1-13 Frequency standard .. 1-13 General .. 1-13 Options and accessories ..1-14 List of figuresFig. 1-1 Transmitter test setup .. 1-2 Fig. 1-2 Receiver test 1-3 Fig. 1-3 One port duplex test setup .. 1-4 Fig. 1-4 Two port duplex test setup .. 1-4 Fig. 1-5 Cellular radio-telephone test setup ..1-5 Fig. 1-6 AF test 1-6 GENERAL INFORMATION1-246882-311 DPurpose and features2945A is a portable COMMUNICATIONS Service monitor for carrying out production, routine andmaintenance testing on radio transmitters, receivers and two way radio communication Service monitor contains modules to provide facilities equivalent to the followinginstruments.

10 -RF generator, two audio generators, specialised tones generator, RF power meter, modulationmeter, RF counter, AF counter, AF voltmeter, distortion meter, large screen digital oscilloscope,spectrum analyzer and monitoring measuring filters, AF post demodulation filters and IF passband filters, are built in forinclusion in relevant measurement signal obtained from the demodulators, when in Tx test mode, is fed to an AF amplifier andcan be monitored on the built-in loudspeaker, on headphones connected to the accessory socket, ortaken from the DEMOD OUT connector to other monitor has a wide range of test capabilities including base station, mobile and transpondercommissioning and servicing, radio telephone system and radio pager testing, as well as productiontesting to all of the selection of a test mode configures the modules into set-ups ready for connection to theequipment to be tested and produces the appropriate set-up screen on the display.