Tait 2000-4231 Mobile Transceiver User Manual 2k3 01

Tait Limited Mobile Transceiver 2k3 01

service manual part 1

Customer ServicesMobile Radio DivisionTait Electronics LtdPO Box 1645ChristchurchNew ZealandFax: (64) (3) 358-3903Company Name ___________________________Name ___________________________Department ___________________________Street or PO Box ___________________________Town and Postcode ___________________________Country ___________________________Manual Product Code M___________-______-_______So that you are kept up to date with documentation relevant to this product, please fill outand return this registration form.Do you wish to be notified by your Tait subsidiary when Revision Packages are available, sothat you can keep this manual up to date? YesWould you like to know about technical training services?  YesIn order to improve our documentation, we would like your opinion of this manual. Pleaseput a mark in the column that best describes your opinion.Comments: ________________________________________________________________________________________________________________________________________________________Is there any additional documentation we should provide?_______________________________________________________________________________________________________________What industry are you in (e.g. Telecomms, Security, Forestry)?___________________________Do you use other Tait products?poor average excellentTechnical DepthTechnical AccuracyReadabilityEase of UseDocument FormatOverall SatisfactionT2000  T700  T800 Mobile Data  Trunking  Other

Tait Electronics Ltd558 Wairakei RoadP.O. Box 1645ChristchurchNew ZealandPhone: 64 3 358-3399Fax: 64 3 358-3636Tait Electronics (Aust) Pty Ltd275 Toombul RoadNorthgate 4013P.O. Box 679VirginiaQueensland 4014AustraliaPhone: 61 7 3865-7799Toll Free: 1 300 304-344Fax: 61 7 3865-7990E-mail: helpdesk@tait.com.auTait Mobile Radio Inc.Unit 5, 158 Anderson AvenueMarkhamOntario L6E1A9CanadaPhone: 1 905 472-1100Fax: 1 905 472-5300E-mail: 110252.44@compuserve.comTait France S.A.R.L.2 avenue de la Cristallerie92 316 Sèvres, CedexFrancePhone: 33 1 41 14-05-50Fax: 33 1 41 14-05-55E-mail: 100675.651@compuserve.comTait Mobilfunk GmbHWillstätterstraße 50D-90449 Nürnberg 60GermanyPhone: 49 911 967-460Fax: 49 911 967-4679E-mail: tait@t-online.deTait Mobile Radio (Hong Kong) LtdRoom 703A New East OceanCentre9 Science Museum RoadTsim Sha Tsui EastHong KongPhone: 852 2369-3040Fax: 852 2369-3009E-mail: 106122.2060@compuserve.comTait Communications LtdUnit 4, 75 Blenheim RoadP.O. Box 1185ChristchurchPhone: 64 3 348-3301Fax: 64 3 343-0558E-mail: nsc@tcl.tait.co.nzTait Electronics (Far East) Pte Ltd4 Leng Kee RoadSIS Building #05-11ASingapore 159088Phone: 65 471-2688Fax: 65 479-7778E-mail: taittfe@singnet.com.sgTait Mobile Radio (Taiwan) Ltd1104, 142 Chung Hsiao E RdSec 4TaipeiTaiwanPhone: 886 2 2731-1290Fax: 886 2 2711-6351E-mail: tait8503@ms7.hinet.netTait Mobile Radio Ltd14/1 Suwan Tower, Ground FloorSoi Saladaeng 1North Sathorn RdBangrakBangkok 10500ThailandPhone: 662 267-6290Fax: 662 267-6293E-mail: taitthd@loxinfo.co.thTait Mobile Radio LtdErmine Business ParkErmine RoadHuntingdonCambridgeshire PE18 6YAUnited KingdomPhone: 44 1480-52255Fax: 44 1480-411996E-mail: techsupport@tait.co.ukTait Electronics (USA) Inc.9434 Old Katy RoadSuite 110HoustonTexas 77055USAPhone: 1 713 984-8684Toll Free: 1 800 222-1255Fax: 1 713 468-6944E-mail: tech@taitus.com
!This manual contains general, technical and servicing informa-tion on T2000 Series II mobile two-way radios.We have published this manual in a ring binder so that “revisionpackages” containing additional information can be added asrequired.Revision packages will normally be published to coincide withthe release of information on a new PCB, and may also containadditions or corrections pertaining to other parts of the manual.If you return the customer registration card at the front of thismanual, you will be notified when revision packages containingnew PCB information and/or text are available. You may thenorder as many packages as you require from your local TaitCompany. Revision packages are supplied ready-punched forinclusion in your manual.Each page in this manual has a date of issue. This is to complywith various Quality Standards, but will also serve to identifywhich pages have been updated and when. Each page and itspublication date is listed in the “List of Effective Pages”, and anew list containing any new/revised pages and their publica-tion dates will be sent with each revision package.Any portion of text that has been changed is marked by a verti-cal line (as shown at left) in the outer margin of the page. Wherethe removal of an entire paragraph means there is no text left tomark, an arrow (as shown at left) will appear in the outer mar-gin. The number beside the arrow will indicate how many para-graphs have been deleted.The manual issue and revision status are indicated by the lastthree digits of the manual product code. These digits start at 100and will increment through 101, 102, 103, etc., as revision pack-ages are published, e.g: Thus, Issue 301 indicates the first revision to issue 3, and meansthat one package should have been added to the manual. Theissue digit will only change if there is a major product revision,or if the number of revision packages to be included means thatthe manual becomes difficult to use, at which point a new issuemanual will be published in a new ring binder.PCB information is provided for all current issue PCBs, as wellas all previous issue PCBs manufactured in production quanti-ties, and is grouped according to PCB. Thus, you will find theparts list, grid reference index (if necessary), PCB layouts andcircuit diagram(s) for each individual PCB grouped together.23 0 1issue status revision status
"If you find an error in this manual, or have a suggestion on howit might be improved, please do not hesitate to contact the Tech-nical Writer, Product Support Group, Tait Mobile Radio Divi-sion, Tait Electronics Ltd, P.O. Box 1645, Christchurch, NewZealand.##$Any enquiries regarding this manual or the equipment it describes should be addressedin the first instance to your nearest approved Tait Dealer or Service Centre. Further tech-nical assistance may be obtained from the Product Support Group, Tait Mobile RadioDivision, Tait Electronics Ltd, Christchurch, New Zealand.%&'(&!In the interests of improving performance, reliability or servicing, Tait Electronics Ltdreserve the right to update their equipment and/or manuals without prior notice.)&All information contained in this manual is the property of Tait Electronics Ltd. Allrights are reserved. This manual may not, in whole or part, be copied, photocopied,reproduced, translated stored or reduced to any electronic medium or machine readableform without prior written permission from Tait Electronics Ltd.*#Service Manuals should be ordered from your nearest Tait Branch or approved Dealer.When ordering, quote the Tait product code and, where applicable, the version.*$M2000-00-300 T2000 Series II Service Manual Issue 300 published January 1997Issue 301 published March 1998
+,*'#The total number of pages in this Manual is 484, as listed below. Page Issue Date131/12/97231/12/97331/10/96431/10/96531/12/97631/12/97731/12/97831/12/97931/12/9710 31/10/9611 31/12/9712 31/12/9713 31/12/9714 31/12/9715 31/12/9716 31/12/9717 31/12/9718 31/12/9719 31/12/9720 31/12/971.1 31/10/961.2 31/10/961.3 31/10/961.4 31/10/961.5 31/12/971.6 31/12/971.7 31/10/961.8 31/10/961.9 31/12/971.10 31/10/962.1 31/10/962.2 31/10/962.3 31/10/962.4 31/10/962.5 31/10/962.6 31/10/962.7 31/10/962.8 31/10/962.9 31/10/962.10 31/10/962.11 31/10/962.12 31/10/962.13 31/10/962.14 31/10/962.15 31/10/962.16 31/10/962.17 31/10/962.18 31/10/962.19 31/10/962.20 blank3.1 31/12/973.2 31/10/963.3 31/10/963.4 31/10/963.5 31/10/963.6 31/12/973.7 31/10/963.8 31/10/963.9 31/12/973.10 31/12/973.11 31/12/973.12 31/10/963.13 31/10/963.14 31/10/963.15 31/10/963.16 31/10/963.17 31/10/963.18 31/10/964.1 31/10/964.2 31/12/974.3 31/10/964.4 31/10/964.5 31/10/964.6 31/10/964.7 31/10/964.8 31/10/964.9 31/10/964.10 31/10/964.11 31/10/964.12 blank5.1 31/10/965.2 31/10/965.3 31/10/965.4 31/10/965.5 31/10/965.6 31/10/965.7 31/10/965.8 31/10/965.9 31/10/965.10 31/10/965.11 31/10/965.12 31/10/965.13 31/10/965.14 31/10/965.15 31/10/965.16 31/10/96
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1) 2$1.1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1.21.2 Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1.31.2.1 Introduction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1.31.2.2 General. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1.31.2.3 Receiver Performance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1.51.2.4 Transmitter Performance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1.71.2.5 Frequency Reference . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1.81.2.6 Trunking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1.91.2.6.1 T2030, T2035, T2040 & T2050 Models . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1.91.2.6.2 T2060 Model . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1.91.3 Operating Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1.91.4 Product Codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1.10 )##&2.1 Design Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2.22.2 Synthesiser . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2.32.3 Audio & Regulators. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2.42.4 TCXO/TX Audio PCB. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2.42.5 IF PCB . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2.52.6 T2000-100 & -400 RF PCB . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2.62.6.1 T2000-100 & -400 Receiver . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2.62.6.2 T2000-100 & -400 Exciter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2.72.6.3 T2000-100 & -400 Power Amplifier . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2.72.7 T2000-200 RF PCB . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2.82.7.1 T2000-200 Receiver. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2.82.7.2 T2000-200 Exciter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2.92.7.3 T2000-200 Power Amplifier . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2.92.8 T2000-300 RF PCB . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2.102.8.1 T2000-300 Receiver. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2.102.8.2 T2000-300 Exciter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2.112.8.3 T2000-300 Power Amplifier . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2.112.9 T2000-500, T2000-600, T2000-700, -900 & -000 RF PCB. . . . . . . . . . . . . . . . . . . . . .2.122.9.1 T2000-500, -600, -700, -900 & -000 Receiver . . . . . . . . . . . . . . . . . . . . . . .2.122.9.2 T2000-500, -600, -700 -900 & -000 Exciter . . . . . . . . . . . . . . . . . . . . . . . . .2.132.9.3 T2000-500, -600, -700, -900 & -000 Power Amplifier. . . . . . . . . . . . . . . .2.13
2.10 T2000-800 RF PCB . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2.142.10.1 T2000-800 Receiver. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.142.10.2 T2000-800 Exciter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.152.10.3 T2000-800 Power Amplifier. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2.152.11 Control Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2.162.11.1 T2010 & T2015 HC05 Logic PCB . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2.162.11.2 T2020, T203X, T2040, T2050 & T2060 HC11 Logic PCB . . . . . . . . . . . . .2.19 $##3.1 Servicing Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3.23.1.1 Caution: Accidental Transmit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3.23.1.2 Caution: Antenna Loading. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3.23.1.3 Caution: Beryllium Oxide & Power Transistors . . . . . . . . . . . . . . . . . . . .3.23.1.4 Caution: CMOS Devices . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3.23.1.5 Caution: Screw Head Types. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3.33.2 Disassembly Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3.53.2.1 To Gain Access To The Logic PCB. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3.53.2.2 To Remove The Bottom Cover And Microprocessor Shield . . . . . . . . . .3.53.2.3 To Detach The Control Head . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3.63.2.3.1 Locally Mounted Models . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3.63.2.3.2 Remotely Mounted Models . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3.63.2.4 To Disassemble The Control Head . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3.73.2.4.1 T2010, T2015, T203X & T2060 Radios . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3.73.2.4.2 T2020, T2040 & T2050 Radios. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3.93.2.5 To Detach The EMC Filter PCB . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3.113.2.6 To Remote A Locally Mounted T2020, T2040 & T2050. . . . . . . . . . . . . . 3.113.3 Power Amplifier - Special Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3.123.3.1 To Replace PA Transistors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3.123.3.2 To Remove Case Mica Capacitors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3.123.4 Repair . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3.133.4.1 Surface Mount Devices . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3.133.4.1.1 Surface Mount Device (SMD) Precautions. . . . . . . . . . . . . . . . . . . . . . . .3.133.4.1.2 Servicing Equipment Required . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3.133.4.1.3 Removal & Replacement Of SMD Components . . . . . . . . . . . . . . . . . . .3.153.4.1.4 Common Causes Of SMD Failure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3.173.4.2 Leaded Component Removal. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3.173.4.2.1 Desoldering Iron Method . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3.173.4.2.2 Component Cutting Method . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3.183.5 Programming . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3.18" 3#4.1 Test Equipment Required. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4.24.2 Connecting The Radio. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4.3
4.3 Trunked Radios . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4.44.3.1 Trunking System Check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4.44.4 Receiver Performance Tests . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4.54.4.1 To Check The Squelch Operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4.54.4.2 To Check The Squelch Ratio. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4.54.4.3 To Check The Audio Output Level And Distortion . . . . . . . . . . . . . . . . .4.64.4.4 To Check The Sinad Sensitivity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4.64.4.5 To Check The Signal+Noise To Noise Ratio. . . . . . . . . . . . . . . . . . . . . . . .4.74.4.6 To Check The Ultimate Signal To Noise Ratio. . . . . . . . . . . . . . . . . . . . . .4.74.4.7 RSSI. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4.74.4.8 To Check The Operation Of The Noise Blanker . . . . . . . . . . . . . . . . . . . .4.84.5 Transmitter Performance Tests . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4.94.5.1 Audio Processor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4.94.5.1.1 To Check The Limiter Circuit Operation . . . . . . . . . . . . . . . . . . . . . . . . . .4.94.5.1.2 To Check The Audio ALC Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4.94.5.1.3 To Check The Gain Of The Audio Processor . . . . . . . . . . . . . . . . . . . . . .4.104.5.2 Modulation Characteristics. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4.104.5.2.1 To Check The Above Limiting Response . . . . . . . . . . . . . . . . . . . . . . . . .4.104.5.2.2 To Check The Below Limiting Response . . . . . . . . . . . . . . . . . . . . . . . . .4.104.5.3 To Check The RF Power Control Circuit . . . . . . . . . . . . . . . . . . . . . . . . .4.11+ 335.1 Servicing Warning. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5.25.2 Visual Checks. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5.25.3 Component Checks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5.25.3.1 Transistor Check. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5.25.3.2 Integrated Circuit (IC) Check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5.25.4 DC Checks. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5.35.5 Receiver RF Checks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5.45.5.1 VCO Frequency . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5.45.5.2 Control Line Voltages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5.45.5.3 RF Sensitivity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5.55.6 Transmitter RF Checks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5.55.7 Trunked Radios: System Check. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5.65.7.1 Base Station Check. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5.65.7.1.1 T2030 Radios. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5.65.7.1.2 T2040 Radios. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5.65.7.2 Base Station Control Channel Hunt. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5.65.8 Trunked Radios: Test Mode. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5.75.8.1 Test Mode Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5.75.8.2 Manual Test Mode (MTM) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5.75.8.2.1 T2030 & T2035 MTM Operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5.8
 5.8.2.2 T2040 & T2050 MTM Operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5.95.8.3 Computer Controlled Test Mode (CCTM). . . . . . . . . . . . . . . . . . . . . . . . .5.95.8.3.1 CCTM Selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5.105.8.3.2 CCTM Protocol. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.105.8.4 Power-Up State. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5.115.8.5 Test Facilities Available. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5.115.8.5.1 Resetting The Radio. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.115.8.5.2 Test Facilities Table . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5.125.8.6 Trunked Radios: Radio Mode/Status Display Codes . . . . . . . . . . . . . .5.155.9 Options Interface Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5.175.10 Fault Finding Charts. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.205.10.1 Radio Won’t Switch On. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.215.10.2 Radio Won’t Program . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5.225.10.3 Synthesiser Faults. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5.235.10.4 Receiver Front End Faults. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.245.10.5 Receiver IF Faults. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5.255.10.6 Receiver Mute Faults. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.265.10.7 No Audio On Receive . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5.275.10.8 Transmitter RF Low Power Faults. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5.285.10.9 Transmitter Power Control Faults. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5.305.10.10 Transmit Audio Absent. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5.315.10.11 Trunked Radios: Radio Won’t Acquire A Control Channel . . . . . . . . .5.32- 4!56.1 Tuning Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6.26.2 Tuning & Adjustment Points. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6.36.3 Trunked Radios . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6.56.4 Transmitter Adjustments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6.56.4.1 Power Output. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6.56.4.2 TCXO Alignment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6.66.4.3 Dual Point Modulation Adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6.66.4.4 CTCSS Modulation Adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6.76.4.5 LTR Code Deviation Adjustment. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6.76.4.6 Modulation Adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6.76.4.7 Selcall Tone Deviation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6.86.4.8 FFSK Adjustment (Trunked Models Only) . . . . . . . . . . . . . . . . . . . . . . . .6.86.4.8.1 T203X Radios . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6.86.4.8.2 T2040 Radios. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6.86.5 Receiver Adjustments. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6.96.5.1 RF Alignment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6.96.5.2 Internal Mute Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6.106.5.3 RSSI . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6.106.5.3.1 ‘L’ Level Set-Up (Trunked Radios Only) . . . . . . . . . . . . . . . . . . . . . . . . .6.10
". )6$7.1 T2000-100 RF PCBParts List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .IPN 220-01331-02 . . . . . . . . . . . . . 7.1.1Mechanical & Miscellaneous Parts . . . . . . . . . . . . . . . ". . . . . . . . . . . . . . . . . . . . . 7.1.4Grid Reference Index. . . . . . . . . . . . . . . . . . . . . . . . . . . ". . . . . . . . . . . . . . . . . . . . . 7.1.5PCB Layout - Top. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ". . . . . . . . . . . . . . . . . . . . . 7.1.7PCB Layout - Bottom. . . . . . . . . . . . . . . . . . . . . . . . . . . ". . . . . . . . . . . . . . . . . . . . . 7.1.8Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ". . . . . . . . . . . . . . . . . . . . . 7.1.97.2 T2000-200 RF PCBParts List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .IPN 220-01202-10 . . . . . . . . . . . . . 7.2.1Mechanical & Miscellaneous Parts . . . . . . . . . . . . . . . ". . . . . . . . . . . . . . . . . . . . . 7.2.4Grid Reference Index. . . . . . . . . . . . . . . . . . . . . . . . . . . ". . . . . . . . . . . . . . . . . . . . . 7.2.5PCB Layout - Top. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ". . . . . . . . . . . . . . . . . . . . . 7.2.7PCB Layout - Bottom. . . . . . . . . . . . . . . . . . . . . . . . . . . ". . . . . . . . . . . . . . . . . . . . . 7.2.8Circuits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ". . . . . . . . . . . . . . . . . . . . . 7.2.97.3 T2000-300 RF PCBParts List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .IPN 220-01314-01 . . . . . . . . . . . . . 7.3.1Mechanical & Miscellaneous Parts . . . . . . . . . . . . . . . ". . . . . . . . . . . . . . . . . . . . . 7.3.4Grid Reference Index. . . . . . . . . . . . . . . . . . . . . . . . . . . ". . . . . . . . . . . . . . . . . . . . . 7.3.5PCB Layout - Top. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ". . . . . . . . . . . . . . . . . . . . . 7.3.7PCB Layout - Bottom. . . . . . . . . . . . . . . . . . . . . . . . . . . ". . . . . . . . . . . . . . . . . . . . . 7.3.8Circuits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ". . . . . . . . . . . . . . . . . . . . . 7.3.97.4 T2000-400 RF PCBParts List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .IPN 220-01204-11 . . . . . . . . . . . . . 7.4.1Mechanical & Miscellaneous Parts . . . . . . . . . . . . . . . ". . . . . . . . . . . . . . . . . . . . . 7.4.4Grid Reference Index. . . . . . . . . . . . . . . . . . . . . . . . . . . ". . . . . . . . . . . . . . . . . . . . . 7.4.5PCB Layout - Top. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ". . . . . . . . . . . . . . . . . . . . . 7.4.7PCB Layout - Bottom. . . . . . . . . . . . . . . . . . . . . . . . . . . ". . . . . . . . . . . . . . . . . . . . . 7.4.8Circuits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ". . . . . . . . . . . . . . . . . . . . . 7.4.97.5 T2000-500/-600 RF PCBParts List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .IPN 220-01205-14 . . . . . . . . . . . . . 7.5.1Mechanical & Miscellaneous Parts . . . . . . . . . . . . . . . ". . . . . . . . . . . . . . . . . . . . . 7.5.6Grid Reference Index. . . . . . . . . . . . . . . . . . . . . . . . . . . ". . . . . . . . . . . . . . . . . . . . . 7.5.7PCB Layout - Top. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ". . . . . . . . . . . . . . . . . . . . . 7.5.9PCB Layout - Bottom. . . . . . . . . . . . . . . . . . . . . . . . . . . ". . . . . . . . . . . . . . . . . . . . 7.5.10Circuits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ". . . . . . . . . . . . . . . . . . . . 7.5.117.6 T2000-700/-900 RF PCBParts List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .IPN 220-01289-02 . . . . . . . . . . . . . 7.6.1Mechanical & Miscellaneous Parts . . . . . . . . . . . . . . . ". . . . . . . . . . . . . . . . . . . . . 7.6.4Grid Reference Index. . . . . . . . . . . . . . . . . . . . . . . . . . . ". . . . . . . . . . . . . . . . . . . . . 7.6.5PCB Layout - Top. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ". . . . . . . . . . . . . . . . . . . . . 7.6.7PCB Layout - Bottom. . . . . . . . . . . . . . . . . . . . . . . . . . . ". . . . . . . . . . . . . . . . . . . . . 7.6.8Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ". . . . . . . . . . . . . . . . . . . . . 7.6.9
+7.7 T2000-800 RF PCBParts List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . IPN 220-01305-03 . . . . . . . . . . . . . 7.7.1Mechanical & Miscellaneous Parts . . . . . . . . . . . . . . . " . . . . . . . . . . . . . . . . . . . . 7.7.4Grid Reference Index . . . . . . . . . . . . . . . . . . . . . . . . . . " . . . . . . . . . . . . . . . . . . . . 7.7.5PCB Layout - Top . . . . . . . . . . . . . . . . . . . . . . . . . . . . . " . . . . . . . . . . . . . . . . . . . . 7.7.7PCB Layout - Bottom. . . . . . . . . . . . . . . . . . . . . . . . . . . " . . . . . . . . . . . . . . . . . . . . 7.7.8Circuits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . " . . . . . . . . . . . . . . . . . . . . 7.7.97.8 T2000 IF PCBParts List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . IPN 220-01384-00 . . . . . . . . . . . . . 7.8.1PCB Layout - Top . . . . . . . . . . . . . . . . . . . . . . . . . . . . . " . . . . . . . . . . . . . . . . . . . . 7.8.3PCB Layout - Bottom. . . . . . . . . . . . . . . . . . . . . . . . . . . " . . . . . . . . . . . . . . . . . . . . 7.8.4Circuits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . " . . . . . . . . . . . . . . . . . . . . 7.8.57.9 T2000 TCXO/TX Audio PCBParts List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . IPN 220-01389-00 . . . . . . . . . . . . . 7.9.1PCB Layout - Top . . . . . . . . . . . . . . . . . . . . . . . . . . . . . " . . . . . . . . . . . . . . . . . . . . 7.9.3PCB Layout - Bottom. . . . . . . . . . . . . . . . . . . . . . . . . . . " . . . . . . . . . . . . . . . . . . . . 7.9.4Circuits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . " . . . . . . . . . . . . . . . . . . . . 7.9.57.9 T2000 TCXO/TX Audio PCBParts List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . IPN 220-01389-02 . . . . . . . . . . . . . 7.9.7PCB Layout - Top. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . " . . . . . . . . . . . . . . . . . . . . 7.9.9PCB Layout - Bottom. . . . . . . . . . . . . . . . . . . . . . . . . . . " . . . . . . . . . . . . . . . . . . . 7.9.10Circuits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . " . . . . . . . . . . . . . . . . . . . .7.9.117.10 T2010 & T2015 HC05 Logic PCBParts List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . IPN 220-01377-01 . . . . . . . . . . . . 7.10.1Mechanical & Miscellaneous Parts . . . . . . . . . . . . . . . " . . . . . . . . . . . . . . . . . . . 7.10.4Grid Reference Index . . . . . . . . . . . . . . . . . . . . . . . . . . " . . . . . . . . . . . . . . . . . . . 7.10.5PCB Layout - Top . . . . . . . . . . . . . . . . . . . . . . . . . . . . . " . . . . . . . . . . . . . . . . . . . 7.10.7PCB Layout - Bottom. . . . . . . . . . . . . . . . . . . . . . . . . . . " . . . . . . . . . . . . . . . . . . . 7.10.8Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . " . . . . . . . . . . . . . . . . . . . 7.10.97.10 T2010 & T2015 HC05 Logic PCBParts List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . IPN 220-01377-02 . . . . . . . . . . . .7.10.11Mechanical & Miscellaneous Parts . . . . . . . . . . . . . . . " . . . . . . . . . . . . . . . . . . 7.10.14Grid Reference Index . . . . . . . . . . . . . . . . . . . . . . . . . . " . . . . . . . . . . . . . . . . . . 7.10.15PCB Layout - Top. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . " . . . . . . . . . . . . . . . . . . 7.10.17PCB Layout - Bottom. . . . . . . . . . . . . . . . . . . . . . . . . . . " . . . . . . . . . . . . . . . . . . 7.10.18Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . " . . . . . . . . . . . . . . . . . . 7.10.197.10 T2010 & T2015 HC05 Logic PCBParts List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . IPN 220-01377-03 . . . . . . . . . . . 7.10.21Mechanical & Miscellaneous Parts . . . . . . . . . . . . . . . " . . . . . . . . . . . . . . . . . . 7.10.24Grid Reference Index . . . . . . . . . . . . . . . . . . . . . . . . . . " . . . . . . . . . . . . . . . . . . 7.10.25PCB Layout - Top. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . " . . . . . . . . . . . . . . . . . . 7.10.27PCB Layout - Bottom. . . . . . . . . . . . . . . . . . . . . . . . . . . " . . . . . . . . . . . . . . . . . . 7.10.28Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . " . . . . . . . . . . . . . . . . . . 7.10.29
-7.11 T2020, T203X, T2040, T2050 & T2060 HC11 Logic PCBParts List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .IPN 220-01344-02 . . . . . . . . . . . . 7.11.1Mechanical & Miscellaneous Parts . . . . . . . . . . . . . . . ". . . . . . . . . . . . . . . . . . . . 7.11.4Grid Reference Index. . . . . . . . . . . . . . . . . . . . . . . . . . . ". . . . . . . . . . . . . . . . . . . . 7.10.5PCB Layout - Top. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ". . . . . . . . . . . . . . . . . . . . 7.11.7PCB Layout - Bottom. . . . . . . . . . . . . . . . . . . . . . . . . . . ". . . . . . . . . . . . . . . . . . . . 7.11.8Circuits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ". . . . . . . . . . . . . . . . . . . . 7.11.97.11 T2020, T203X, T2040, T2050 & T2060 HC11 Logic PCBParts List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .IPN 220-01344-04 . . . . . . . . . . . 7.11.13Mechanical & Miscellaneous Parts . . . . . . . . . . . . . . . ". . . . . . . . . . . . . . . . . . . 7.11.16Grid Reference Index. . . . . . . . . . . . . . . . . . . . . . . . . . . ". . . . . . . . . . . . . . . . . . . 7.10.17PCB Layout - Top. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ". . . . . . . . . . . . . . . . . . . 7.11.19PCB Layout - Bottom. . . . . . . . . . . . . . . . . . . . . . . . . . . ". . . . . . . . . . . . . . . . . . . 7.11.20Circuits. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ". . . . . . . . . . . . . . . . . . . 7.11.217.12 T2010 & T2030 Control Head PCBParts List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .IPN 220-01331-02 . . . . . . . . . . . . 7.12.1Mechanical & Miscellaneous Parts . . . . . . . . . . . . . . . ". . . . . . . . . . . . . . . . . . . . 7.12.2PCB Layout - Top. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ". . . . . . . . . . . . . . . . . . . . 7.12.3PCB Layout - Bottom. . . . . . . . . . . . . . . . . . . . . . . . . . . ". . . . . . . . . . . . . . . . . . . . 7.12.4Circuits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ". . . . . . . . . . . . . . . . . . . . 7.12.57.13 T2015 & T2060 Control Head PCBParts List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .IPN 220-01320-01 . . . . . . . . . . . . 7.13.1Mechanical & Miscellaneous Parts . . . . . . . . . . . . . . . ". . . . . . . . . . . . . . . . . . . . 7.13.2PCB Layout - Top. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ". . . . . . . . . . . . . . . . . . . . 7.13.3PCB Layout - Bottom. . . . . . . . . . . . . . . . . . . . . . . . . . . ". . . . . . . . . . . . . . . . . . . . 7.13.4Circuits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ". . . . . . . . . . . . . . . . . . . . 7.13.57.14 T2020, T2040 & T2050 Control Head PCBParts List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .IPN 220-01321-04 . . . . . . . . . . . . 7.14.1Mechanical & Miscellaneous Parts . . . . . . . . . . . . . . . ". . . . . . . . . . . . . . . . . . . . 7.14.3PCB Layout - Top. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ". . . . . . . . . . . . . . . . . . . . 7.14.5PCB Layout - Bottom. . . . . . . . . . . . . . . . . . . . . . . . . . . ". . . . . . . . . . . . . . . . . . . . 7.14.6Circuits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ". . . . . . . . . . . . . . . . . . . . 7.14.77.15 T2035 Control Head PCBParts List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .IPN 220-01322-03 . . . . . . . . . . . . 7.15.1Mechanical & Miscellaneous Parts . . . . . . . . . . . . . . . ". . . . . . . . . . . . . . . . . . . . 7.15.2PCB Layout - Top. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ". . . . . . . . . . . . . . . . . . . . 7.15.3PCB Layout - Bottom. . . . . . . . . . . . . . . . . . . . . . . . . . . ". . . . . . . . . . . . . . . . . . . . 7.15.4Circuits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ". . . . . . . . . . . . . . . . . . . . 7.15.57.16 T2000 EMC Filter PCBParts List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .IPN 220-01383-01 . . . . . . . . . . . . 7.16.1PCB Layout - Top. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ". . . . . . . . . . . . . . . . . . . . 7.16.3PCB Layout - Bottom. . . . . . . . . . . . . . . . . . . . . . . . . . . ". . . . . . . . . . . . . . . . . . . . 7.16.4Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ". . . . . . . . . . . . . . . . . . . . 7.16.57.17 T2000 Data Interface Decoupling PCBParts List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .IPN 220-01388-01 . . . . . . . . . . . . 7.17.1PCB Layout - Top. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ". . . . . . . . . . . . . . . . . . . . 7.17.3PCB Layout - Bottom. . . . . . . . . . . . . . . . . . . . . . . . . . . ". . . . . . . . . . . . . . . . . . . . 7.17.4Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ". . . . . . . . . . . . . . . . . . . . 7.17.5
./ !##8.1 T2008 Power Supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8.1.18.1.1 Operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8.1.28.1.2 Performance Specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8.1.38.1.3 Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8.1.58.1.4 Circuit Operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8.1.68.1.5 Installation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8.1.88.1.6 Introduction To Servicing. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8.1.108.1.7 Setting Up The Power Supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8.1.128.1.8 Fault Finding. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8.1.148.1.9 Repair. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8.1.158.1.10 PCB Information. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8.1.178.2 Connection To External Devices . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8.2.18.2.1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8.2.18.2.2 Applications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8.2.18.2.3 Connections. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8.2.28.2.4 T2010 & T2015 BCD Selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8.2.28.3 T2000-500 & T2000-600 1-7W Versions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8.3.18.3.1 Components Required. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8.3.28.3.2 Fitting. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8.3.28.3.3 Set-Up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8.3.48.3.4 Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8.3.48.4 T2000-05 Remote Speaker Kit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8.4.18.4.1 Components Required. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8.4.18.4.2 Fitting. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8.4.18.5 T2000-06 Desktop Microphone Kit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8.5.18.5.1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8.5.18.5.2 Fitting. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8.5.18.5.3 T2000-06 Set-Up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8.5.18.5.4 Sensitivity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8.5.28.6 T2000-07 DTMF Microphone Kit. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8.6.18.6.1 Fitting. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8.6.18.6.2 Operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8.6.18.6.3 T2000-07 Set-Up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8.6.18.7 T2000-34 Selcall Kit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8.7.18.7.1 Components Required. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8.7.28.7.2 Fitting. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8.7.28.7.3 Programming . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8.7.38.8 T2000-36 Selcall Kit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8.8.18.8.1 Components Required. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8.8.28.8.2 Fitting. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8.8.28.8.3 PCB Information. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8.8.48.9 T2000-40 DTMF Kit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8.9.18.9.1 Fitting. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8.9.18.9.2 Programming . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8.9.1
/8.10 T2000-A450X CTCSS & Scrambler Kit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8.10.18.10.1 Components Required. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8.10.28.10.2 Fitting. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8.10.28.10.3 T2000-A450X Link Options. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8.10.38.10.4 PCB Information. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8.10.58.11 T2000-50 Handsfree Kit. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8.11.18.11.1 Components Required. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8.11.28.11.2 Fitting. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8.11.28.11.3 Fitting The Complete Unit In The Vehicle . . . . . . . . . . . . . . . . . . . . . . 8.11.38.11.4 T2000-50 Set-Up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8.11.58.11.5 Signal Specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8.11.78.11.6 Specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8.11.88.11.7 Circuit Description. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8.11.88.11.8 PCB Information. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8.11.108.12 T2000-60 Dual Port UART Kit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8.12.18.12.1 Components Required. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8.12.28.12.2 Fitting. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8.12.38.12.3 T2000-60 Link Options. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8.12.48.12.4 T2000-60 Set-Up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8.12.58.12.5 Signal Specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8.12.78.12.6 PCB Information. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8.12.98.13 T2000-A66 Single Port UART Kit. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8.13.18.13.1 Components Required. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8.13.28.13.2 Fitting. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8.13.28.13.3 Signal Specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8.13.38.13.4 PCB Information. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8.13.48.14 T2000-80 Line Interface Kit. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8.14.18.14.1 Components Required. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8.14.28.14.2 Fitting. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8.14.28.14.3 Line Interface Options. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8.14.48.14.4 T2000-80 Set-Up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8.14.78.14.5 Signal Specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8.14.98.14.6 Applications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8.14.108.14.7 Specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8.14.168.14.8 Circuit Description. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8.14.188.14.9 PCB Information. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8.14.218.15 T2000-A70 Data Modem Kit. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8.15.18.15.1 Components Required. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8.15.28.15.2 Fitting. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8.15.28.15.3 T2000-A70 Link Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8.15.48.15.4 Signal Specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8.15.58.15.5 Programming . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8.15.68.15.6 Circuit Description. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8.15.128.15.7 PCB Information. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8.15.138.16 T2000-A03/-A04/-A16 Remote Loom Kits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8.16.18.16.1 Components Required. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8.16.28.16.2 Fitting To Locally Mounted Radios . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8.16.28.16.3 Fitting To Remote Mounted Radios. . . . . . . . . . . . . . . . . . . . . . . . . . . . 8.16.6
00 79.1 Identifying The Software Version Number. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9.29.2 Software History . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9.39.2.1 T2010 & T2015 Radios . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9.39.2.2 T2020 Radios. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9.49.2.3 T2030 & T3035 Radios . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9.59.2.4 T2040 Radios. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9.69.2.5 T2050 Radios. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9.79.2.6 T2060 Radios. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9.8,*$Figure 2.1 T2000 TCXO/TX Audio PCB Block Diagram . . . . . . . . . . . . . . . . . . . . . .2.4Figure 2.2 T2000 IF PCB Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2.5Figure 2.3 T2000-100 & -400 RF PCB Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . .2.6Figure 2.4 T2000-200 RF PCB Block Diagram. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2.8Figure 2.5 T2000-300 RF PCB Block Diagram. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2.10Figure 2.6 T2000-500, -600, -700, -900 & -000 RF PCB Block Diagram . . . . . . . . . .2.12Figure 2.7 T2000-800 RF PCB Block Diagram. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2.14Figure 2.8 T2010 & T2030 Control Head Block Diagram . . . . . . . . . . . . . . . . . . . . .2.17Figure 2.9 T2015 & T2060 Control Head Block Diagram . . . . . . . . . . . . . . . . . . . . .2.17Figure 2.10 T2020, T2040 & T2050 Control Head. . . . . . . . . . . . . . . . . . . . . . . . . . . . .2.18Figure 3.1 Anti-Static Bench Set-Up. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3.2Figure 3.2 Screwdriver Identification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3.3Figure 3.3 T2000 Series II Radio Assembly. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3.4Figure 3.4 T2010, T2015 & T203X Control Head Assembly . . . . . . . . . . . . . . . . . . . . 3.7Figure 3.5 T2020, T2040 & T2050 Control Head Assembly - Locally Mounted. . . .3.9Figure 3.6 T2020, T2040 & T2050 Control Head Assembly - Remotely Mounted.3.10Figure 3.7 EMC Filter PCB Mounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3.11Figure 3.8 Identifying SMD Components. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3.14Figure 3.9 SMD Soldering Guide . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3.16Figure 4.1 Suggested Test Equipment Set-Up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4.3Figure 5.1 RF Test Cable . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5.5Figure 6.1 RF & TXCO/Tx Audio PCBs - Tuning & Adjustment Points . . . . . . . . .6.4Figure 6.2 Receiver Tuning Amplifier. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6.9Figure 8.1.1 T2008 Float Charging Protection Circuit . . . . . . . . . . . . . . . . . . . . . . . . 8.1.9Figure 8.1.2 T2008 Typical Waveforms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8.1.15Figure 8.3.1 T2000-500/600 PA - Top Side. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8.3.2Figure 8.3.2 T2000-500/600 PA - Bottom Side. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8.3.3Figure 8.3.3 T2000-500/600 PA - Bottom Side. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8.3.3Figure 8.4.1 T2000 Power Connector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8.4.2Figure 8.7.1 T2000-34 Selcall PCB Mounting - T2010 & T2015 Logic PCB . . . . . . . 8.7.3Figure 8.8.1 T2000-36 Selcall PCB Mounting. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8.8.2Figure 8.10.1 T2000-A450X PCB Mounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8.10.2Figure 8.11.1 T2000-50 Handsfree PCB Mounting . . . . . . . . . . . . . . . . . . . . . . . . . . . 8.11.2Figure 8.11.2 T2000-50 Test Equipment Set-Up. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8.11.5
1Figure 8.11.3 T2000-50 9 Way D-Range Connector (S21). . . . . . . . . . . . . . . . . . . . . . 8.11.7Figure 8.12.1 T2000-60 UART PCB Mounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8.12.3Figure 8.12.2 T2000-60 Test Equipment Set-Up. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8.12.5Figure 8.12.3 T2000-60 15 Way D-Range connector (S21) . . . . . . . . . . . . . . . . . . . . . 8.12.8Figure 8.13.1 T2000-A66 Single Port UART PCB Mounting . . . . . . . . . . . . . . . . . . . 8.13.3Figure 8.13.2 9 Way D-Range Connector (SKT1). . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8.13.3Figure 8.14.1 T2000-80 Line Interface PCB Mounting (T2010/T2015 shown) . . . . 8.14.2Figure 8.14.2 T2000-80 Test Equipment Set-Up. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8.14.7Figure 8.14.3 T2000-80 15 Way D-Range connector (S21) . . . . . . . . . . . . . . . . . . . . . 8.14.9Figure 8.14.4 T2000-80 Line Interface PCB Block Diagram . . . . . . . . . . . . . . . . . . . 8.14.18Figure 8.15.1 T2000-A70 PCB Mounting. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8.15.2Figure 8.15.2 T2000-A70 Data Modem PCB Mounting . . . . . . . . . . . . . . . . . . . . . . . 8.15.3Figure 8.15.3 Data Interface Decoupling PCB Mounting: Series I Chassis . . . . . . . 8.15.3Figure 8.15.4 Data Interface Decoupling PCB Mounting: Series II Chassis . . . . . . 8.15.4Figure 8.15.5 9 Way D-Range Connector (SKT1). . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8.15.5Figure 8.16.1 Remote Control Head Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8.16.3Figure 8.16.2 Connector PCB Mounting. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8.16.4Figure 8.16.3 EMC FIlter PCB Mounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8.16.4Figure 8.16.4 Dummy Front Panel Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8.16.5,*Table 5.1 T2000 Test Facilities . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5.13Table 5.2 Radio Mode/Status Display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5.16Table 5.3 Options Connectors - Audio Signal Specifications . . . . . . . . . . . . . . . .5.17Table 5.4 Options Connectors - Supply Voltage Specifications . . . . . . . . . . . . . .5.17Table 5.5 Options Connectors - Logic Signal Specifications . . . . . . . . . . . . . . . . .5.18Table 5.6 BCD Channel Selection (T2010 & T2015 only) . . . . . . . . . . . . . . . . . . . .5.19Table 6.1 Tuning & Adjustment Point . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6.3Table 8.15.1 Message Format . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8.15.7Table 8.15.2 Messages To The Radio Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8.15.8Table 8.15.3 Messages From The Radio Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8.15.10Table 8.15.4 Software Test Commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8.15.11
 8 2$This Section introduces the T2000 Series II radio, describing models and features availa-ble and their performance.The following topics are covered in this Section:Section Title Page1.1 Introduction 1.21.2 Specifications 1.31.2.11.2.21.2.31.2.41.2.51.2.61.2.6.11.2.6.2IntroductionGeneralReceiver PerformanceTransmitter PerformanceFrequency ReferenceTrunkingT2030, T2035, T2040 & T2050 ModelsT2060 Model1.31.31.51.71.81.91.91.91.3 Operating Instructions 1.91.4 Product Codes 1.10
8 8 $#The T2000 Series II is a high performance mobile two way radio. It covers ten frequencybands between 66 and 870MHz, and is available in both trunked and conventional mod-els.Operation of the T2000 is by handheld microphone, a press-to-talk switch and a range offront panel function keys. The T2020 and T2040 models are fitted with an LCD displayand alphanumeric keypad.Most of the functions of the T2000 are microprocessor controlled. The system software isstored in a read only memory (ROM), while the data is stored in a non-volatile memoryfor ease of programming. Operational parameters can be programmed without openingthe radio, via the front panel microphone socket.The T2000 uses a synthesiser with a single VCO switched between transmit and receive.A plug-in TCXO PCB is used to provide a highly stable reference frequency, and dualpoint modulation gives a flat modulation response at the synthesiser.The standard T2000 RF power output is 25W, except in the T2000-800 which delivers15W. The receiver is electronically tuned across the entire frequency band and containsan IF noise blanker and RSSI facility. A maximum of 4W of audio is delivered to a 4Ωspeaker.The RF and logic PCBs are shielded from each other in a diecast aluminium chassis, andare connected by two plug-in looms. The T2000 top and bottom covers are also diecastaluminium.There is provision within the radio to mount option PCBs and a 9 or 15 way output con-nector which is used for options requiring connection to external equipment. Standardoptions include hands-free operation, line control interface, signalling and data trans-mission.The DC supply to the radio must be negative earth and may be between 10.8 and 16V.The T2000 is protected against reversal of the DC supply and is provided with overvolt-age protection.If further information is required about the T2000 or this Manual, it may be obtainedfrom Tait Electronics Ltd or accredited agents. When requesting this information, pleasequote the equipment product code (e.g. T2010-512-002) and serial number. In the case ofthe Service Manual, quote the product code (e.g. M2000-00-300), and for circuit dia-grams quote the ‘Title’, ‘Internal Part Number’ (IPN) and ‘Issue’.
 8 8 &##88 $#The performance figures given are typical figures, unless otherwise indicated, for equip-ment operating at standard room temperature. Where applicable, the test methods usedto obtain the following performance figures are those described in the European specifi-cation ETS 300-086.Details of test methods and the conditions which apply for type approval testing in allcountries can be obtained from Tait Electronics Ltd.88 2Modulation Type .. FMFrequency Ranges:T2000-100 .. 220 to 270MHzT2000-200 .. 66 to 88MHzT2000-300 .. 136 to 174MHzT2000-400 .. 175 to 225MHzT2000-500 .. 400 to 470MHzT2000-600 .. 450 to 520MHzT2000-700 .. 330 to 360MHzT2000-800 .. 800 to 870MHz (Tx).. 851 to 870MHz (Rx)T2000-900 .. 360 to 400MHzT2000-000 .. 500 to 530MHzFrequency Increment:All Except T2000-800 .. 5 or 6.25kHzT2000-800 .. 12.5kHzNumber Of Channels:T2010 .. 4T2015 .. 24T2020 .. 100Bandwidth .. 7.5, 12 or 15kHzSwitching Range:T2000-200 .. 22MHzT2000-300 .. 38MHzT2000-400, T2000-100 .. 50MHzT2000-500, T2000-600 .. 70MHzT2000-700 .. 30MHzT2000-800 .. 70MHz (Tx).. 19MHz (Rx)T2000-900 .. 40MHz
8" Tx/Rx Offset:T2000-200 .. 0 to 22MHzT2000-300 .. 0 to 38MHzT2000-400, T2000-100 .. 0 to 50MHzT2000-500, T2000-600 .. 0 to 70MHzT2000-700 .. 0 to 30MHzT2000-800 .. 0 to 45MHzT2000-900 .. 0 to 40MHzSupply Voltage:Operating Range .. 10.8V to 16V DCStandard Test Voltage .. 13.8V DCPolarity .. negative earthPolarity & Overvoltage Protection .. internal transorb crowbarBrown-out Recovery .. <2s to full operation following supplyfluctuations below 10.8VSupply Current:Economy Mode .. <270mA (T201X/T203X/T2060) or<350mA (T2020/T2040/T2050)Receiver:Squelched .. 320mA (T201X/T203X/T2060) or472mA (T2020/T2040/T2050)Full Audio .. 1.2ATransmit:T2000-200, -300, -400, -800 .. 6AT2000-500 .. 6.8AT2000-600 .. 7AT2000-100, -700, -900 .. 6.8AT2000-000 .. 7.5ATx/Rx Changeover Switching .. solid stateOperating Temperature Range .. -30ºC to +60ºC ambientProgramming .. clone or PC program via mic. socketAntenna:Impedance .. 50Ω (nominal)Connector .. BNC (UHF optional on VHF radios only)Power/Speaker Connector .. 7 way automotive typeOptions Connector .. 9 or 15 way high density D-range(optional)Radio Unit Dimensions:Depth .. 150mmWidth .. 150mmHeight .. 45mmFront Panel Dimensions:Depth .. 25mmWidth .. 158mmHeight .. 51mm
 8+Remote Control Head Dimensions:Length .. 26mmWidth .. 159mmHeight .. 51mmWeight (radio & control head) .. 1.2kg88 ##Type: All Except T2000-200 .. triple conversion superheterodyneT2000-200 .. dual conversion superheterodyneSensitivity:12dB Sinad .. better than -117dBm20dB Sinad (psophometric) .. better than -113dBm20dB Quieting .. better than -113dBmIF Amplifiers:Frequencies:T2000-200 .. 10.7MHz and 455kHzT2000-100, -300, -400 .. 27.7MHz, 10.7MHz and 455kHzT2000-500, -600, -700, -900, -000 .. 49.1MHz, 10.7MHz and 455kHzT2000-800 .. 61.9MHz, 10.7MHz and 455kHzFirst Local Oscillator Injection (with respect to signal):T2000-200, -300 .. high sideT2000-100, -400, -500, -600, -700, -800, .. low side-900, -000Second Local Oscillator Injection (with respect to signal):T2000-100, -300, -400 .. high sideT2000-200, -500, -600, -700, -800, -900, -000 .. low sideThird Local Oscillator Injection (with respect to signal):T2000-100, -300, -400 .. low sideT2000-500, -600, -700 -800, -900, -000 .. low sideBandwidth:Narrow Band .. 7.5kHzMedium Band .. 12kHzWide Band .. 15kHzSignal-to-Noise Ratio (with respect to 100% deviation, at RF level of -47dBm):Narrow Band .. 45dBMedium Band .. 48dBWide BandAll Except T2000-800 .. 50dBT2000-800 .. 45dB
8- Audio:Minimum Load Impedance .. 2ΩRated Power (into 4Ω) .. 4W (at 1kHz)Distortion:@ Rated Power (1kHz) .. <5%@ 0.5W (0.3 to 3.0kHz) .. <3% (narrow band)<2.5% (medium band)<2% (wide band)Response .. within +1, -3dB of 6dB/octavede-emphasisBandwidth .. 300Hz to 3kHzSelectivity .. better than 70dBSpurious Response AttenuationAll Except T2000-000, -800 .. 75dB (80dB EIA)T2000-000 .. 60dBT2000-800 .. 70dB (70dB EIA)Intermodulation Response Attenuation .. 66dB (75dB EIA)Spurious Emissions .. better than -57dBm(conducted & radiated to 1GHz)Spurious Emissions .. better than -47dBm(conducted & radiated 1 to 4GHz)Blocking .. better than -23dBmCo-channel Rejection:Narrow Band .. better than 9dBMedium Band .. better than 7dBWide Band .. better than 6dBGroup Delay .. ±50µs (300Hz to 3kHz)Squelch:Preset Level .. 11dB sinadRatio .. >70dBVoting Levels .. >20dB sinad(applies to T2020 only)
 8.88" #Power Output:Maximum:All Except T2000-800 .. 30WT2000-8000 .. 25WHigh (high setting):All Except T2000-800 .. 25WT2000-8000 .. 15W. Low (low setting):T2000-200, -300, -400 .. 1 to 25WT2000-100, -500, -600, -700, -900 .. 5 to 25WT2000-800 .. 5 to 15WLow Power Version .. 1 to 7W (T2000-500, -600)Duty Cycle (33%) .. 2 minutes Tx, 4 minutes RxLock Up Time (synthesiser) .. 25ms (from PTT to 90% output powerwithin 2kHz, not including micro.delay)Spurious Emissions .. better than -36dBm(conducted & radiated to 1GHz)Spurious Emissions .. better than -30dBm(conducted & radiated to 1 to 4GHz)Adjacent Channel Power:Narrow Band .. better than -65dBcMedium Band .. -70dBcWide Band .. -80dBcGroup Delay .. +200/-50µs (300Hz to 3kHz)Modulation System:Type .. direct FMDeviation Limiting:Narrow Band .. ±2.5kHz (peak) max.Medium Band .. ±4kHz (peak) max.Wide Band .. ±5kHz (peak) max.Bandwidth:Narrow Band .. 300Hz to 2.55kHz below limiting or450Hz to 2.55kHz in limitingMedium & Wide Band .. 300Hz to 3kHz below limiting or450Hz to 3kHz in limitingResponses:In Limiting .. within +0dB, -4dB of maximumsystem deviationBelow Limiting .. within +1, -3dB of 6dB/octavepre-emphasisAbove 3kHz .. greater than 25dB/octave roll-off
8/ Audio:Microphone Type .. dynamic or electretInput For 60% Deviation .. 1.5mVrms maximum (at 1kHz)Distortion .. 5%Hum & Noise:All Except T2000-800:Narrow Band .. 39dBMedium Band .. 43dBWide Band .. 45dBT2000-800:Wide Band .. 40dBMismatch Capability:Ruggedness .. 2 minutes transmission into infiniteVSWRStability .. VSWR 5:1 (all phase angles)Transmit Timer (non-trunking models) .. programmable up to 4 minutes, orcontinuous.88+ 3(##Oscillator Frequency .. 12.8MHzCrystal Stability And Source Details .. see table below:*. Not fitted to T2000-200 due to low modulatibility.†. Fitted only to 400MHz versions and above, due to low modulatibility.Product Code Frequency Tolerance(ppm) Temperature Range (ºC) Frequency SourceT2XX-XX1±5 -10 to +60 TE/45 xtalT2XX-XX3*±3 -30 to +60 VXO-2605A ModuleT2XX-XX5±2.5 -30 to +60 VXO-2605A-1 Module†T2XX-XX6±2.0 -30 to +60 TDC 60281 Module†
 8088- 988-8 1 1:1 +:1"141+1Data Modulation .. as per MPT1317Data Deviation (Tx: 60% full system deviation):Narrow Band .. 1.5kHzMedium Band .. 2.4kHzWide Band .. 3kHz88-8 1-1System .. LTR® trunked1, systems x groups = 24Data Deviation (Tx) .. 1kHz8 *&$#Refer to the User’s Guide supplied with the radio. These are also available separatelyunder the following IPNs:T2010/T2015 459-20100-0XT2020 459-20200-0XT2030/T2035 459-20300-0XT2040 459-20400-0XT2060 459-20600-0XComprehensive Operator’s Manuals are also available for T2020 and T2040 radios.These Manuals cover such topics as advanced user operations and the use of trunkedradios for data applications. These are available under the following IPNs:T2020 409-20200-0XT2040 409-20400-0X1. LTR is a trademark of E F Johnson & Co.
81 8" #)The 3 groups of digits in a T2000 product code provide information about the radio’smodel, RF type and options fitted, according to the conventions described below.The following explanation of the T2000 product codes is not intended to suggest thatany combination of features is necessarily available in any one radio. For details regard-ing availability of specific T2000 radios, consult your nearest Tait dealer or subsidiary.The Model group indicates the basic features of the radio, as follows:T20XX-XXX-XXX T2010 4 channelsT2015 24 channelsT2020 100 channelsT2030 4 calls, all preset trunkedT2035 1000 calls, including 20 preset trunkedT2040 dialled calls trunkedT2050 dual mode T2040 or T2020 operation trunked, non-trunkedT2060 LTR®, systems x groups = 24 trunked3&RF Type group uses 3 digits to indicate the basic RF configuration of the radio.The first digit in the RF Type group designates frequency band.T20XX-XXX-XXX ‘1’ for 220 to 270MHz‘2’ for 66 to 88MHz‘3’ for 136 to 174MHz‘4’ for 175 to 225MHz‘5’ for 400 to 470MHz‘6’ for 450 to 520MHz‘7’ for 330 to 360MHz‘8’ for 800 to 870MHz transmit851 to 870MHz receive‘9’ for 360 to 400MHz‘0’ for 500 to 530MHzThe second digit in the RF Type group designates radio IF bandwidth.T20XX-XXX-XXX ‘1’ for wide band (15kHz)‘2’ for narrow band (7.5kHz)‘3’ for medium band (12.5kHz)The third digit in the RF Type group designates frequency stability.T20XX-XXX-XXX refer to “Frequency Reference” on page 1.8.*&T20XX-XXX-XXX The third group of digits covers a wide range of software and mar-ket specific options. The large number of options and their frequentchanges preclude listing them here.
 8 )##&This Section describes the operation of the basic circuit blocks found in the T2000 radio.Refer also to the circuit diagrams in Section 7 of this Manual.The following topics are covered in this Section:Section Title Page2.1 Design Overview 2.22.2 Synthesiser 2.32.3 Audio & Regulators 2.42.4 TCXO/TX Audio PCB 2.42.5 IF PCB 2.52.6 T2000-100 & -400 RF PCB 2.62.6.12.6.22.6.3T2000-100 & -400 ReceiverT2000-100 & -400 ExciterT2000-100 & -400 Power Amplifier2.62.72.72.7 T2000-200 RF PCB 2.82.7.12.7.22.7.3T2000-200 ReceiverT2000-200 ExciterT2000-200 Power Amplifier2.82.92.92.8 T2000-300 RF PCB 2.102.8.12.8.22.8.3T2000-300 ReceiverT2000-300 ExciterT2000-300 Power Amplifier2.102.112.112.9 T2000-500, T2000-600, T2000-700, -900 & -000 RF PCB 2.122.9.12.9.22.9.3T2000-500, -600, -700, -900 & -000 ReceiverT2000-500, -600, -700 -900 & -000 ExciterT2000-500, -600, -700, -900 & -000 Power Amplifier2.122.132.132.10 T2000-800 RF PCB 2.142.10.12.10.22.10.2T2000-800 ReceiverT2000-800 ExciterT2000-800 Power Amplifier2.142.152.152.11 Control Module 2.162.11.12.11.2 T2010 & T2015 HC05 Logic PCBT2020, T203X, T2040, T2050 & T2060 HC11 Logic PCB 2.162.19
8 8 *7The T2000 radio is made up of two modules, the RF module and the control module.The RF module consists of an RF PCB unique to each frequency band with commonplug-in IF and TCXO/Tx audio PCBs, determining the frequency stability and referencefrequency. The control module consists of a logic PCB and a control head PCB. Each con-trol module is unique to each T2000 model, i.e. T2010, T2015, T2020, T203X, T2040 orT2050.The following circuit blocks are located in the RF module:• The synthesiser, containing the- Tx/Rx VCO- plug-in TCXO and Tx audio PCB- Tx/Rx switching.• The regulators and audio power amplifier.• The receiver, containing the- front end- mixer- noise blanker- mute circuit- RSSI- plug-in IF PCB.• The exciter, RF power amplifier and power control circuit.The following circuit blocks are located in the control module:• The microprocessor control circuitry.• Audio processing.• Control head.• Options connectors (refer to Section 5.9, “Options Interface Specifications”).
 8 8 Synthesiser IC201 (MC145158) receives channel and reference frequency informationfrom the microprocessor via a three line serial interface:• DATA - synthesiser data: A counter: 7 bitsM counter: 10 bitsRef. counter: 14 bits• CLK - synthesiser clock• ENABLE - synthesiser latch.Once the data has been latched in, the synthesiser IC processes the incoming signals; finfrom the prescaler IC and fref from the temperature compensated crystal oscillator(TCXO) operating at 12.8MHz. The TCXO signal is divided by the reference counter toprovide 5kHz, 6.25kHz or 12.5kHz at the phase detector. IC201 generates the moduluscontrol at the appropriate time to change the dividing factor for the prescaler. The phasedetector outputs are summed and fed via the integrator to the control line. The VCO fre-quency increases with a positive change in control line voltage.The synthesiser produces a signal called LCK-DET which is fed to the exciter after someprocessing to prevent transmission when the synthesiser is out of lock. The LCK-DETsignal is also fed to the I/O bus of the control circuitry, where the signal is used for fea-tures such as scanning. The time lapse between the synthesiser latch pulse and the lockdetect line going low is typically 15ms (maximum is 20ms).The T2000 uses a dual point modulation system which allows the radio to be modulatedat frequencies below the loop filter cut-off frequency (approximately 400Hz). In this sys-tem, modulation is supplied to both the VCO and TCXO. When both the reference andVCO are modulated below the cut-off frequency of the loop filter, the phase detectorcannot detect a difference between fin, and fref and will not generate corrective signals.The modulation bandwidth is therefore dependent only on the audio and coupling cir-cuits.
8" 8 !4The nominal supply voltage of the T2000 is 13.8VDC but satisfactory operation is possi-ble from supply voltages of between 10.8 and 16V. Power for the radio is switched viathe volume control and switch on the control head.Overvoltage protection is provided in the form of an 18V zener diode. This will sup-press transient spikes but prolonged overvoltage will cause the device to fail short cir-cuit.On the RF PCB, two regulated power supply rails of 8V and 5V are provided as well asa 30V supply from an inverter. The 30V supply is used to feed the synthesiser loop filterand the receiver front end tuning. A switched 8V line is used to enable the transmitterand disable the receiver.13.8V is applied directly to the RF and audio power amplifiers, with the audio poweramplifier rated for a standard output of 4Wrms into 4Ω, at a nominal supply voltage of13.8V.8" );*;!)6The TCXO/Tx audio PCB provides the temperature compensated 12.8MHz referencefrequency for the synthesiser and a times-three multiplier in the receiver. The PCB alsocontains the Tx audio limiter, deviation level potentiometer and low pass filter. TheTCXO fine frequency adjustment is provided by a ten turn potentiometer. Narrow orwide band deviation and TCXO frequency stability with temperature are determinedsolely by this PCB.
 8+8+ $3)6The l0.7MHz signal from the RF PCB feeds Q104, passes through a crystal filter (Xl0l)and is amplified by Q111 and Q112 before passing through a 10.7MHz ceramic filter to amixer/oscillator (Qll3). This 455kHz mixer output is further filtered and amplified byCF102, CF103 and Q114, then passes back to the RF PCB where it is demodulated byIC101. The RSSI function is internal to IC101.The demodulated signal is filtered and compensated on the IF PCB before passing to thelogic PCB via the RF PCB. Narrow band or wide band response is determined solely bythe IF PCB.The processed transmit audio passes to the RF PCB where it is split into a VCO modula-tion path and a TCXO modulation path. The TCXO path passes through a potentiome-ter to enable the dual point modulation to be correctly adjusted, and then returns to theTCXO/Tx audio PCB.
8- 8- 111114"113)68-8 111114"11#The incoming signal from the antenna via the PIN switch passes through a high pass fil-ter to the RF amplifier, Q101. The 50Ω output from the amplifier is coupled to a varicaptuned triplet which provides the spurious response rejection necessary for the firstmixer. An attenuator is provided at the output to allow for fine adjustment of the frontend gain.The VCO output is fed to the first double balanced mixer via a low pass filter to reduceharmonic content. The VCO signal is 27.7MHz below the RF signal and the first mixeroutput (at 27.7MHz) feeds the first post-mixer buffer, Q103. The output of Q103 feedsboth a delay line and the noise blanker circuit.
 8.L114 and L116 form a 50Ω delay line which provides the spurious response rejectionnecessary for the second mixer. L114 and L116 also provide the delay necessary for thenoise blanker to detect and clamp noise pulses. The local oscillator signal of 38.4MHzfor the second double balanced mixer is provided by the 12.8MHz reference via a triplercircuit, and the 10.7MHz output feeds the plug-in IF PCB. Each sub-block within thefront end has been designed with 50Ω terminations for ease of testing and fault finding.8-8 111114"11'<#The VCO output from the PIN switch is amplified to 900mW by a two stage broad bandexciter (Q301 and Q302) with approximately 22dB of gain. Q301 is operating into com-pression to prevent changes in VCO drive affecting output power.This output power is controlled by varying the collector voltage on Q302, via Q303,Q304 and the feedback loop from the PA. The power settings (maximum, high and low)are under microprocessor control and are set for each channel by programming.R308, R309, R310 and R313 form a 2dB attenuator, reducing the output to approximately550mW and also providing good isolation between the exciter and PA.8-8 111114"117!&The 550mW exciter output is amplified to 30W by Q305 and Q306. Q305 has a smallamount of bias applied (via R319, D302, R322 and R315) to provide stability at lowpower levels.The T2000-100 power amplifier has no tuning, and when the output power is set to 25Wthe variation across the 50MHz switching range should be less than ±2W.The high level RF signal passes via the Tx/Rx PIN switch, the low pass filter and direc-tional coupler to the antenna connector. The power level is sensed by D301 on the direc-tional coupler and this voltage is fed back to the power control operational amplifier viaRV324. RV324 on the RF PCB sets the high power and RV507 on the logic PCB willadjust the low power.
8/ 8. 111113)68.8 11111#The incoming signal from the antenna via the PIN switch passes through a high pass fil-ter to the RF amplifier, Q101. The 50Ω output from the amplifier is coupled to a varicaptuned triplet that provides the spurious response rejection necessary for the first mixer.An attenuator is provided at the output to allow for fine adjustment of the front endgain.The VCO output is fed to the first double balanced mixer via a low pass filter to reduceharmonic content. The VCO signal is 10.7MHz above the RF signal and the first mixeroutput (at 10.7MHz) feeds the first post-mixer buffer, Q103. The output of Q103 feedsboth a delay line and the noise blanker circuit.
 80L114 and L116 form a 50Ω delay line that provides the delay necessary for the noiseblanker to detect and clamp noise pulses and also provides a high impedance point forthe signal to be clamped.The 10.7MHz output feeds the plug-in IF PCB through R128, R129 and R132 which pro-vide the attenuation equivalent to the second mixer of the T2000-300, T2000-400, T2000-500 or T2000-600.Each sub-block within the front end has been designed with 50Ω terminations for easeof testing and fault finding.8.8 11111'<#The VCO output from the PIN switch is amplified to 500mW by a two stage broad bandexciter (Q301 and Q302) with approximately 2ldB of gain. Q301 is operating into com-pression to prevent changes in VCO drive affecting output power. This output power iscontrolled by varying the collector voltage on Q302, via Q303, Q304 and the feedbackloop from the PA. The power settings (maximum, high and low) are under microproces-sor control and are set for each channel by programming. R308A, R308, R309 and R310provide approximately 1dB of attenuation and isolation between the exciter and poweramplifier.8.8 111117!&The 500mW exciter output is amplified to 30W by Q305 and Q306. The T2000-200 poweramplifier has no tuning, and when the output power is set to 25W the variation acrossthe 22MHz switching range should be less than ±2W.The high level RF signal passes via the Tx/Rx PIN switch, the low pass filter and thedirectional coupler to the antenna connector. The power level is sensed by D301 on thedirectional coupler and this voltage is fed back to the power control operational ampli-fier via RV324. RV324 on the RF PCB sets the high power and RV507 on the logic PCBwill adjust the low power.
81 8/ 111 113)68/8 111 11#The incoming signal from the antenna via the PIN switch passes through a high pass fil-ter to the RF amplifier, Q101. The 50Ω output from the amplifier is coupled to a varicaptuned triplet which provides the spurious response rejection necessary for the firstmixer. An attenuator is provided at the output to allow for fine adjustment of the frontend gain.The VCO output is fed to the first double balanced mixer via a low pass filter to reduceharmonic content. The VCO signal is 27.7MHz above the RF signal and the first mixeroutput (at 27.7MHz) feeds the first post-mixer buffer, Q103. The output of Q103 feedsboth a delay line and the noise blanker circuit.
 8L114 and L116 form a 50Ω delay line which provides the spurious response rejectionnecessary for the second mixer. L114 and L116 also provide the delay necessary for thenoise blanker to detect and clamp noise pulses. The local oscillator signal of 38.4MHzfor the second double balanced mixer is provided by the l2.8MHz reference via a triplercircuit, and the 10.7MHz output feeds the plug-in IF PCB.Each sub-block within the front end has been designed with 50Ω terminations for easeof testing and fault finding.8/8 111 11'<#The VCO output from the PIN switch is amplified to 1W by a two stage broad bandexciter (Q301 and Q302) with approximately 22dB of gain. Q301 is operating into com-pression to prevent changes in VCO drive affecting output power.This output power is controlled by varying the collector voltage on Q302, via Q303,Q304 and the feedback loop from the PA. The power settings (maximum, high and low)are under microprocessor control and are set for each channel by programming.R308, R309, R310 and R313 form a 2.7dB attenuator, reducing the output to approxi-mately 550mW and also providing good isolation between the exciter and PA.8/8 111 117!&The 550mW exciter output is amplified to 30W by Q305 and Q306. Q305 has a smallamount of bias applied (via R319, D302, R322 and R315) to provide stability at lowpower levels.The T2000-300 power amplifier has no tuning, and when the output power is set to 25Wthe variation across the 38MHz switching range should be less than ±2W.The high level RF signal passes via the Tx/Rx PIN switch, the low pass filter and direc-tional coupler to the antenna connector. The power level is sensed by D301 on the direc-tional coupler and this voltage is fed back to the power control operational amplifier viaRV324. RV324 on the RF PCB sets the high power and RV507 on the logic PCB willadjust the low power.
8 80 111+11:111-11:111.11:01141113)6808 111+11:-11:.11:0114111#The incoming signal from the antenna via the PIN switch passes through a high pass fil-ter to the RF amplifier, Q101. The 50Ω output from the amplifier is coupled to a varicaptuned triplet which provides the spurious response rejection necessary for the firstmixer. An attenuator is provided at the output to allow for fine adjustment of the frontend gain.
 8 The VCO output is fed to the first double balanced mixer via a low pass filter to reduceharmonic content. The VCO signal is 49.lMHz below the RF signal and the first mixeroutput (at 49.lMHz) feeds the first post-mixer buffer, Q103. The output of Q103 feedsboth a delay line and the noise blanker circuit.L114 and L116 form a 50Ω delay line which provides the spurious response rejectionnecessary for the second mixer. L114 and L116 also provide the delay necessary for thenoise blanker to detect and clamp noise pulses. The local oscillator signal of 38.4MHzfor the second double balanced mixer is provided by the 12.8MHz reference via a triplercircuit, and the 10.7MHz output feeds the plug-in IF PCB. Each sub-block within thefront end has been designed with 50Ω terminations for ease of testing and fault finding.808 111+11:-11:.110114111'<#The VCO output from the PIN switch is amplified to 2W by a three stage broad bandexciter (Q300, Q301 and Q302) with approximately 28dB of gain. The first stage (Q301 inthe T2000-500/600, and Q300 in the T2000-700) operates into compression to preventchanges in VCO drive affecting output power.This output power is controlled by varying the collector voltage on Q300, via Q303,Q304 and the feedback loop from the PA. The power settings (maximum, high and low)are under microprocessor control and are set for each channel by programming.808 111+11:-11:.11:01141117!&The 2W exciter output is amplified to 30W by Q305 and Q306. The T2000-500/600/700power amplifier has no tuning, and when the output power is set to 25W the variationacross the switching range should be less than ±2W.The high level RF signal passes via the directional coupler, the Tx/Rx PIN switch andthe low pass filter to the antenna connector. The power level is sensed by D301 on thedirectional coupler and this voltage is fed back to the power control operational ampli-fier via RV324. RV324 on the RF PCB sets the high power and RV507 on the logic PCBwill adjust the low power.
8" 81 111/113)6818 111/11#The incoming signal from the antenna via the PIN switch passes through a band passfilter to the RF amplifier, Q101. The 50Ω output from the amplifier is coupled to a sec-ond band pass filter, and these two filters provide the spurious response rejection neces-sary for the first mixer. An attenuator is provided at the output to allow for fineadjustment of the front end gain.The VCO output is fed to the first double balanced mixer via a low pass filter to reduceharmonic content. The VCO signal is 61.9MHz below the RF signal and the first mixeroutput (at 61.9MHz) feeds the first post-mixer buffer, Q103. The output of Q103 feeds aband pass filter.
 8+L114 and L116 form a 50Ω band pass filter which provides the spurious response rejec-tion necessary for the second mixer. The local oscillator signal of 51.2MHz for the sec-ond double balanced mixer is provided by the 12.8MHz reference via a times 4multiplier circuit, and the 10.7MHz output feeds the plug-in IF PCB.Each sub-block within the front end has been designed with 50Ω terminations for easeof testing and fault finding.818 111/11'<#The VCO output from the PIN switch is amplified to 0.5W by a three stage broad bandexciter (Q300, Q301 and Q302) with approximately 21dB of gain. Q300 is operating intocompression to prevent changes in VCO drive affecting output power.This output power is controlled by varying the voltage on IC405 pin2, via Q303, Q304and the feedback loop from the PA. The power settings (maximum, high and low) areunder microprocessor control and are set for each channel by programming.818 111/117!&The 0.5W exciter output is amplified to 20W by IC405. The T2000-800 power amplifierhas no tuning, and when the output power is set to 15W the variation across the 70MHzswitching range should be less than ±1W.The high level RF signal passes via the directional coupler, the Tx/Rx PIN switch andthe low pass filter to the antenna connector. The power level is sensed by D301 on thedirectional coupler and this voltage is fed back to the power control operational ampli-fier via RV324. RV324 on the RF PCB sets the high power and RV507 on the logic PCBwill adjust the low power.
8- 8 )The primary task of the control section in the T2000 is to control the state of the radio atall times, based both on user input, and activity of the internal circuitry. To achieve this,the control section monitors the radio’s operation and responds to any changes withvarious control signals.The input shift registers are read by the microprocessor approximately 100 times persecond. The output shift registers are updated only when a control signal is required tochange, and the miscellaneous I/O is continually scanned.In the majority of cases, a control output will change only in response to an input stimu-lus, e.g. a control head key being pressed, receiver busy, etc. Some outputs may beaffected by more than one input or a sequence of events; this is particularly so in thecase of the mute gate control line. Its operation may be affected by a number of externalconditions and even some generated in the microprocessor.For operation of the T2000 Series II control heads, refer to Figures 2.8 to 2.10.88 1141+=)1+,#)6Transmitter speech from the microphone is preamplified and fed into an automatic levelcontrol circuit which also has two mute facilities (one for options and one for the micro-processor). The speech is pre-emphasised and high pass filtered to reduce CTCSS com-ponents, then passes via the RF PCB to the limiter on the TCXO/Tx audio PCB.DCS/CTCSS signals are generated by the microprocessor and are filtered by a low passfilter before being passed to the level potentiometer on the TCXO/Tx audio PCB. A fivetone Selcall module is available which is directly interfaced to the microprocessor.Selcall tones are fed to the limiter on the TCXO/Tx audio PCB.Receiver audio from the IF PCB passes through a low pass filter where it is split into sig-nalling and speech paths. Five tone signals are coupled to the five tone module. DCS/CTCSS passes through a low pass filter and limiter before arriving at the microproces-sor. Speech is de-emphasised and passed through one or two high pass filters, depend-ing on the signalling used. Processed speech passes through the mute to an amplifierwhere speech and progress tones are summed. The signal then passes via the volumecontrol to the audio power amplifier on the RF PCB.
 8.
8/ 
 8088 11:1 ;:1"1:1+141-1=),#)6Transmitter speech from the microphone is preamplified and fed into an automatic levelcontrol circuit which also has three mute facilities (one for options and two for themicroprocessor). The speech is pre-emphasised and high pass filtered to reduce CTCSScomponents. The speech passes via the RF PCB to the limiter on the TCXO/Tx audioPCB.The FFSK modem tones pass through a level potentiometer before being fed to the lim-iter on the TCXO/Tx audio PCB. DCS/CTCSS signals are generated by the microproces-sor and are filtered by a low pass filter before being passed to the level potentiometer onthe TCXO/Tx audio PCB. Five tone Selcall and DTMF modules are both available to directly interface to themicroprocessor. Selcall tones are fed to the limiter on the TCXO/Tx audio PCB andDTMF tones are summed at the automatic level control.Receiver audio from the IF PCB passes through a low pass filter where it is split into sig-nalling and speech paths. Five tone signals are coupled to the five tone module. DCS/CTCSS passes through a low pass filter and limiter before arriving at the microproces-sor. FFSK modem signals pass through a buffer amplifier before the modem input.Speech is de-emphasised and passed through one or two high pass filters, depending onwhat signalling is used. Processed speech passes through the mute to an amplifierwhere speech and progress tones are summed. The signal then passes via the volumecontrol to the audio power amplifier, on the RF PCB.
81 
 8 This Section provides information necessary for servicing T2000 Series II radios, andcovers the following topics:Section Title Page3.1 Servicing Precautions 3.23.1.13.1.23.1.33.1.43.1.5Caution: Accidental TransmitCaution: Antenna LoadingCaution: Beryllium Oxide & Power TransistorsCaution: CMOS DevicesCaution: Screw Head Types3.23.23.23.23.33.2 Disassembly Instructions 3.53.2.13.2.23.2.33.2.3.13.2.3.23.2.43.2.4.13.2.4.23.2.53.2.6To Gain Access To The Logic PCBTo Remove The Bottom Cover And Microprocessor ShieldTo Detach The Control HeadLocally Mounted ModelsRemotely Mounted ModelsTo Disassemble The Control HeadT2010, T2015, T203X & T2060 RadiosT2020, T2040 & T2050 RadiosTo Detach The EMC Filter PCBTo Remote A Locally Mounted T2020, T2040 & T20503.53.53.63.63.63.73.73.93.113.113.3 Power Amplifier - Special Instructions 3.123.3.13.3.2 To Replace PA TransistorsTo Remove Case Mica Capacitors 3.123.123.4 Repair 3.133.4.13.4.1.13.4.1.23.4.1.33.4.1.43.4.23.4.2.13.4.2.2Surface Mount DevicesSurface Mount Device (SMD) PrecautionsServicing Equipment RequiredRemoval & Replacement Of SMD ComponentsCommon Causes Of SMD FailureLeaded Component RemovalDesoldering Iron MethodComponent Cutting Method3.133.133.133.153.173.173.173.183.5 Programming 3.18
8  8 ## 88 )!##Under certain circumstances the microprocessor can key the transmitter. Ensure that allinstruments are protected from accidental transmit at all times. 88 )!,The equipment has been designed to operate with a 50Ω termination impedance, butwill tolerate a wide range of antenna loading conditions. However, it is strongly recom-mended that the transmitter is not operated in the absence of a suitable load. Failure toobserve this precaution may result in damage to the transmitter power output stage. 88 )6*<47The RF power transistors in the T2000 all contain some beryllium oxide. This substance,while perfectly harmless in its normal solid form, can become a severe health hazardwhen it has been reduced to dust.For this reason the RF power transistors should not be scratched, mutilated, filed,machined, or physically damaged in any way that can produce dust particles. 88" ))*#This equipment contains CMOS Devices which are susceptible to damage from staticcharges. Care when handling these devices is essential. For correct handling proceduresrefer to manufacturers’ data books covering CMOS devices, e.g. Philips Data HandbookCovering CMOS Devices; Motorola CMOS Data Book Section 5 (Handling Procedures),etc.The following diagram shows a typical anti-static bench set-up.
 8 88+ )#7=&Pozidriv screws are the preferred standard on all T2000 series equipment. Pozidriv No.1 and 2 screwdrivers will fit all pozidriv screws used in the T2000: Philips cross-headscrewdrivers are not satisfactory for use on these screws.The following diagram identifies the differences between Philips and Pozidriv screw-drivers.The diagrams on the following pages show the types of screws used in the T2000Series II radios, their locations and torque specifications.driving flutes with parallel sidesdriving flutes with tapered sidesPozidriv Philipsinternal notches"star" markingsbetween slotsno special markingsslots with parallel sidesslots with tapered sidesridges between driving flutes
8" 7131491211612334458101412
 8+ 8 $# To carry out alignment it is necessary to remove only the top cover (1) andlogic PCB retaining screws (3). It is essential that the bottom cover (13) andmicroprocessor shield (5) with its three retaining screws (4) are torqueddown as specified in Figure 3.3. Various electronic components within the radio can be damaged by elec-trostatic discharge. A properly grounded earth mat and wrist strap shouldbe used at all times (refer to Section 3.1.4). 88 2!##,#)6Refer to Figure 3.3.Remove the top cover (1) by unscrewing the four bottom cover screws (14).Remove the three logic PCB retaining screws (3).It should now be possible to open out the logic PCB (2), giving access to both sidesof the logic PCB, and access to the RF PCB (11) tuning points, audio, plug-inTCXO PCB and loop filter components. 88 6)!#&#Refer to Figure 3.3.Remove the top cover and logic PCB screws as instructed in Section 3.2.1, thenremove the three microprocessor shield retaining screws (4).Remove the screw securing the earthing wire from the control head to the micro-processor shield.It should now be possible to lift off the microprocessor shield (5) and the bottomcover (13).This will give access to both sides of the RF PCB and IF PCBs, and enable the con-trol head to be removed.
8-  88 #)= 88 8 ,#Remove all covers, as instructed in Section 3.2.2.Unplug the loom running between the control head and the logic PCB.  In EMC model radios, the loom connects to a Micromatch connector on theEMC filter PCB (refer to Section 3.2.5). 88 8 Remove the four screws on the front of the radio dummy front panel. This willgive access to the control head loom, which can now be unplugged. In EMC model radios, the loom connects to a Micromatch connector on theEMC filter PCB (refer to Section 3.2.5).
 8. 88" )= 88"8 11:1+:1 ;41-1Refer to Figure 3.4.Remove the control head from the main chassis, as instructed in Section 3.2.3.Remove the four adaptor plate retaining screws (16).Remove the control head PCB retaining screws (14).78245691210131411151631
8/ The screws used in the control head are No. 4 Plastites, and should not be con-fused with the M3 screws used elsewhere. When being replaced, the No. 4 Plas-tite screws must be tightened to a torque of 8in.lb (0.9Nm).With the control head face down, gently remove the PCB (13), along with the key-pad (8) and lightspreader (7).Do not disturb the positioning or height of the LEDs, as this is critical for reas-sembly.Remove the speaker by carefully removing the four speaker retaining spire nuts.Remove of the volume knob (1) and volume pot nut (5) to access the volume knoblight spreader (6).
 80 88"8 11:1"141+1Refer to Figure 3.5 and Figure 3.6.Remove the control head from the main chassis, as instructed in Section 3.2.3.Remove the four adaptor plate/remote back panel retaining screws (16). Remotemounted models also have two captive nuts (17) fitted in the back cover. EMC model radios have 4 ESD plugs fitted over the remote back panel screws.These will need to be removed to access the remote back panel screws.Remove the control head PCB retaining screws (14).The screws used in the control head are No. 4 Plastites, and should not be con-fused with the M3 screws used elsewhere. When being replaced, the No. 4 Plas-tite screws must be tightened to a torque of 8in.lb (0.9Nm).41096512321157816111314
81 With the control head face down, gently remove the PCB (13), along with the key-pad (8) and lightspreader (7).Do not disturb the positioning or height of the LEDs, as this is critical for reas-sembly.Carefully remove the LCD (6) and lens (12).Lay the front panel (3) on a horizontal surface, with the light spreader (7) in place.Remove the volume knob (1) and volume knob nut (5) to access the lightspreaderand keypad (8).Before reassembly, the LCD and PCB edge connectors should be wiped with alco-hol.Take care to ensure the alcohol does not come in contact with the coating on thelight spreader, as this will dissolve on contact with alcohol.
 8 88+ #')3)6Refer to Figure 3.7.Remove the top cover and open the logic PCB, as described in Section 3.2.1.Remove the microprocessor shield and bottom cover, as described in Section 3.2.2. The control head (locally mounted models) or dummy front panel (remotelymounted models) can now be removed.Unplug the loom running between the logic PCB and EMC filter PCB (18).Unplug the loom running between the EMC filter PCB and the control head.Remove the 4 EMC filter PCB retaining screws. The EMC filter PCB can now belifted from the chassis. 88- !,#11:1"141+1Refer to Section 8.16, “T2000-A03/-A04/-A16 Remote Loom Kits”.
8  8 7!&&#$# As the location of certain components in the PA is critical to performance,it is important that any components removed or disturbed are refitted inexactly the same location. 8 8 &#!Desolder the tabs by heating them with a soldering iron, then lifting them uptowards the transistor with a thin stainless steel spike or screwdriver.Unscrew the transistor mounting stud nut or screws and remove the transistor.Trim the tabs of the replacement to make them similar to the faulty item, thenlightly tin the underside of the tabs.Apply a thin layer of heatsink compound to the underside of the transistor.Screw the transistor tightly to the heatsink then solder the tabs.Do not solder the tabs before tightening the screws or nut, as this will fracturethe device. 8 8 )#)&#Apply a heavy duty soldering iron to the top of the capacitor case.When the solder is molten, ease the capacitor away from the PCB with a thinstainless steel spike or screwdriver.
 8 8" & 8"8 ## Surface mount devices require special storage, handling, removal andreplacement techniques. This equipment should be serviced only by anapproved Tait Dealer or Service Centre equipped with the necessary facil-ities. Repairs attempted with incorrect equipment or by untrained person-nel may result in permanent damage. If in doubt, contact Tait ElectronicsLtd or your nearest Tait Branch or Subsidiary. 8"88 ##>?#The following points must be observed when servicing SMDs:• Carry out all servicing in a static safe work area (refer to Figure 3.1).• Always observe static precautions when handling or carrying SMDs. Carry in foil,anti static bags or in trays and anti-static tubes for fine pitch ICs.• Use appropriate tools when working with SMDs (refer to 3.4.1.2).• Do not use soldering irons on surface mount capacitors, resistors, SOIC and SOTcomponents.• Use new solder when replacing SMDs.• Use the correct amount of solder (refer to Figure 3.9).• Never reuse old SMDs.• Do not use SMDs that have been dropped. 8"88 #'(&(• Hot air tool or heat gun: adjustable temperature is required and a regulated hot airblower. The nozzle is changed according to the size of the SMDs.• Weller Pyropen®: this is a butane hot air tool, and is hotter than a heat gun. For useonly for resistors, capacitors and SOTs.• Solder paste dispenser or syringe: for SMD placement.• Tweezers: for use when handling SMDs.• Solderwick: for removing solder on SMD pads or for removing excess solder orbridging on multi-leg components.
8" • Soldering iron: for use on electrolytic capacitors and plastic coated devices that maybe damaged by a heat gun.• Microscope: for individual SMD inspection and for SMD replacement.Use the following diagram to identify types of SMD components. 272272RESISTOR MELF SOIC PLCCLCCCQFPSOTCAPACITOR
 8+ 8"88 4&#*)&Refer to Figure 3.9.(a) Capacitors, Resistors, MELF & SOT Hold the nozzle of the hot air tool above the component and keep it moving toensure that the PCB is not damaged.Remove the SMD and clean away any glue using the hot air tool and a pair oftweezers.Remove any excess solder from the pads using solderwick.Deposit a small amount of solder paste on the pads using the solder paste dis-penser or syringe.Apply heat evenly to both sides of the device using the hot air gun or Weller Pyro-pen®, until all the paste has reflowed. As this happens, the device will self-alignon the pads. If necessary, use tweezers to prevent the SMD from moving whileheat is being applied.(b) SOIC, VSO, QFP, LCCC & PLCC Hold the nozzle of the hot air tool on top of the leads and keep it moving to ensurethat the PCB is not damaged. A hot air tool with the correct size nozzle must beused.After a few seconds heating, use a very gentle twisting motion to allow the deviceto move away from its associated pads.Carefully remove all excess solder from the pads using a soldering iron and sol-derwick.Apply an even amount of solder paste along the full length of the pads, using fluxwhere necessary.Align the device accurately on the pads and apply a slight pressure with thetweezers to hold in place.Hold the heat nozzle at an angle and move it slowly along the leads, ensuring thatthe paste reflows properly.If any fine bridges occur, use a spike or solderwick to clear. If this is necessary,apply more solder paste before using the hot air gun again.
8- capacitor& resistorMELFSOTSOIC(gull leads)PLCC(J leads)excess solderadaquate solder insufficient solder
 8. 8"88" ))*3(a) Cracked SMD Most often occurs with capacitors, caused by:• Thermal shock: if the SMD is heated too rapidly either it will crack or internalseals will be lost, resulting in premature failure.• In-service temperature changes that cause invisible micro-cracks. These startat or just under the end termination and will spread throughout the deviceover a long period of time.(b) Solder Joint Failure • Stress causing flexing of the PCB leads to a cracked joint.• Excessive or too little solder results in a poor quality joint.• Various soldering process defects such as solder balling, device misalignment,solder bridging and glue defects.(c) Static Electricity Damage If static electricity damage is suspected, remove and replace the component. 8"8 ,)&Whenever components are removed from or fitted to the PCB, care must be taken toavoid damage to the track. The two satisfactory methods of removing components fromPTH PCBs are detailed below. 8"88 $Use a desoldering station, e.g. Philips SBC 314 or Pace MBT-100E for this method.Place the tip over the lead and, as the solder starts to melt, move the tip with a cir-cular motion.Start the suction and continue the movement until 3 or 4 circles have been com-pleted.Remove the tip while continuing suction to ensure that all solder is removed fromthe joint, then stop the suction.Before pulling the lead out, ensure it is not stuck to the plating. If the lead is stillnot free, resolder the joint and try again.The desoldering iron does not usually have enough heat to desolder leads fromthe ground plane. Additional heat may be applied by holding a soldering iron onthe tip of the desoldering iron (this may require a helper).
8/  8"88 )&)Cut the leads on the component side of the PCB.Heat the solder joint sufficiently to allow easy removal of the lead by drawing itout from the component side: do not use undue force.Fill the hole with solder and then clear with solderwick. 8+ Refer to the T2000 programming manual supplied with the T2000 programming kit, andSection 9 of this manual.
 "8" 3#This Section details test procedures will confirm that the T2000 has been adjusted cor-rectly and is fully operational.The following topics are covered:Section Title Page4.1 Test Equipment Required 4.24.2 Connecting The Radio 4.34.3 Trunked Radios 4.44.3.1 Trunking System Check 4.44.4 Receiver Performance Tests 4.54.4.14.4.24.4.34.4.44.4.54.4.64.4.74.4.8To Check The Squelch OperationTo Check The Squelch RatioTo Check The Audio Output Level And DistortionTo Check The Sinad SensitivityTo Check The Signal+Noise To Noise RatioTo Check The Ultimate Signal To Noise RatioRSSITo Check The Operation Of The Noise Blanker4.54.54.64.64.74.74.74.84.5 Transmitter Performance Tests 4.94.5.14.5.1.14.5.1.24.5.1.34.5.24.5.2.14.5.2.24.5.3Audio ProcessorTo Check The Limiter Circuit OperationTo Check The Audio ALC OperationTo Check The Gain Of The Audio ProcessorModulation CharacteristicsTo Check The Above Limiting ResponseTo Check The Below Limiting ResponseTo Check The RF Power Control Circuit4.94.94.94.104.104.104.104.11
"8 "8 '(&(The following equipment is required for functional testing.• Power supply cord, wired as shown in Section 8.3.• Power supply adjustable between 9 & 16V DC, with a capacity of at least 8A.• VHF or UHF signal generator: good quality FM 50Ω, usable from 0.1V (-127dBm) to200mV (0dBm) pd (e.g. HP8640B, Marconi 2019).• Frequency counter: 10Hz to 650MHz, 2ppm stability, with at least a 2s time base res-olution (e.g. Opto).• Audio signal generator: 600Ω output, -50 to 0dB level, fully adjustable, sine waveoutput 10Hz to 100kHz (e.g. Trio 203, HP204C/D).• FM deviation meter (e.g. Sayrosa 257 or 252), with the following specifications:-low residual FM-resolution down to a full scale of 1kHz and a minimum of 10kHz-maximum positive and negative peak display-15kHz low pass filter-detected audio output facility. When using with LTR or DCS, the deviation meter must have a good low fre-quency response, to avoid incorrect deviation readings.• Sinad meter or audio distortion analyser, 1kHz notch type (e.g. HP334A, HP339A orHelper Instruments Sinadder).• AC millivoltmeter (e.g. Trio VT-106).• Digital multimeter (e.g. Fluke 75).• 20MHz dual channel oscilloscope and X10 . X1 scope probes (e.g. Trio CS1022).• RF power meter, 50Ω; RF detecting element 50W and 5W for appropriate frequencyranges (e.g. Bird Meter 6154 or 611).• RF power attenuator, 50Ω, total attenuation 30dB (e.g. Weinschel 40-40-33 30dB,150W).• Microphone test box (refer to Figure 4.1).A multifunction test set may be used as long as it has the appropriate function to per-form the calibration correctly e.g. Rhode & Schwarz CMS52 Radio CommunicationsTest Set, with a high stability oscillator.
 "8 "8 )#The following diagram shows a suggested test equipment set-up.
"8" "8 9The ‘test’ facility enables T2000 trunked radios to emulate a multichannel radio, usingthe frequencies reserved for trunking. For a description of how to put the radio in test mode, refer to Section 5.8, “TrunkedRadios: Test Mode”. Once the radio is in test mode, functional testing can be carried outas described in Section 4.4 and Section 4.5. When in test mode, connect the antenna socket to a dummy load to pre-vent interference with trunking systems. Avoid testing on channels in uselocally."8 8 9)#9Connect the radio to an antenna and switch on.Check that the radio locks onto the system:T203X radios: the LED illuminates.T2040 radios: the annunciator will appear in the control head display.The following parameters relating to the local trunking system base station mustbe correctly programmed before the mobile will lock onto the system:• Base station channel numbers and frequencies.•Network ID.• Zone and area field length.• Base station control channel number in the hunt list.• Valid acquisition authorisation code (for test purposes this can be set to ‘none’,which allows total access).Initiate a call to a known unit identity. For test purposes this can be your ownidentity.Check that:• The radio beeps.• A 0.5s ringing tone is sounded.• The receiver unmutes.• T203X: The LED illuminates.• T2040: the annunciator comes on.
 "8+"8" ##In this Section, deviation settings are given first for wide band, followed by settings formedium band in brackets ( ) and settings for narrow band in square brackets [ ]."8"8 )#9(#*&Connect a sinad meter across the speaker terminals.Connect an on-channel RF signal generator to the antenna input terminal.Disable any signalling control in T2010 or T2020 models by using the monitorfunction. The control head LED should now be active.Reduce the signal generator output level to -127dBm, modulated to ±3kHz(±2.4kHz) [±1.5kHz] deviation at 1kHz AF.Increase the RF output level until the squelch gate just opens.Check that the reading on the sinad meter is between 8 and 14dB.Reduce the signal generator output and check that the squelch gate closes within4dB of the original RF level."8"8 )#9(#Set the signal generator output level to -47dBm, modulated to ±5kHz (±4kHz)[±2.5kHz] deviation at 1kHz AF.Replace the sinad meter with an audio millivoltmeter across the speaker termi-nals.Adjust the volume control to the onset of clipping.Reduce the signal generator output level to -127dBm.The fall in output is the ‘squelch ratio’, and this should be at least 70dB.
"8- "8"8 )#9!*&,!Connect an audio millivoltmeter and an oscilloscope across the speaker terminals.Connect an on-channel RF signal generator to the antenna input socket, with theoutput set to -107dBm (1V) modulated to ±5kHz (±4kHz) [±2.5kHz] deviation at1kHz AF.Set the volume control to the onset of clipping.The receiver output should be 4.2Vrms across 4Ω at +13.8V supply.Check the distortion with the aid of a distortion analyser connected across thespeaker terminals.The distortion should not exceed 5%."8"8" )#9Connect a sinad meter across the speaker terminals.Connect the signal generator to the antenna input terminal.Set the signal generator accurately on the receive frequency.Set the modulation for ±3kHz (±2.4kHz) [±1.5kHz] deviation at 1kHz AF.Increase the signal generator output until a 20dB sinad is reached.Switch off the signal generator modulation.Couple a 10.7MHz reference oscillator loosely into the receiver IF stage, tune thesignal generator for a zero beat, then uncouple the reference oscillator.Set the signal generator deviation to ±3kHz (±2.4kHz) [±1.5kHz] at 1kHz AF. The modulating frequency must match the notch of the sinad meter.Set the signal generator output level to -127dBm.Disable the squelch control circuitry using the key on the T2010,T2015, T2020, T2050 or T2060, the key on the T203X, or “function21” on the T2040. The LED should then flash.Increase the signal generator output level until a sinad of 12dB is reached.The signal generator output should not be greater than -117dBm and is typically-119dBm.Fn
 "8."8"8+ )#9@AASet the signal generator output level to -107dBm modulated to ±5kHz (±4kHz)[±2.5kHz] deviation at 1kHz AF.Connect an audio millivoltmeter across the speaker terminals.Set the volume control for a reading of 0.8V (0dBm) on a convenient scale on themillivoltmeter.Switch off the signal generator modulation.Note the reading on the millivoltmeter.The fall in reading when the modulation is switched off should typically be 30dB(28dB) [25dB]."8"8- )#9%A A good quality RF signal generator with low residual FM must be used for thischeck (e.g. HP8640B or 8656).Set the signal generator to give an on-channel signal, modulated to ±5kHz(±4kHz) [±2.5kHz] with a 1kHz tone.Set the signal generator output level to -47dBm.Connect an AC millivoltmeter across the speaker terminals.Adjust the volume control for a reading of 0.8V (0dBm) on a convenient scale.Turn off the signal generator modulation.Note the reading on the millivoltmeter.The fall in reading when the modulation is switched off should be at least 50dB(48dB) [45dB]."8"8. $Set the signal generator to give an unmodulated signal at an output level of-120dBm.Increase the input level in 10dB steps over the 50dB dynamic range and monitorthe RSSI output on pin 15 of S14 (logic PCB).Ensure the output varies approximately 540mV/10dB over the dynamic range.
"8/ "8"8/ )#9*&*A69Connect an ignition noise simulator and an RF signal generator to the receiverantenna input.Set the signal generator modulation for ±3kHz (±2.4kHz) [±1.5kHz] deviation at1kHz AF.Set the signal generator output level to give a 20dB sinad.Listen to the receiver output and check the operation of the noise blanker by tem-porarily short circuiting R135 on the RF PCB to ground, thus disabling the noiseblanker.The noise blanker should give a marked reduction in noise over a wide range ofnoise input amplitudes.
 "80"8+ #In this Section, deviation settings are given first for wide band, followed by settings formedium band in brackets ( ) and settings for narrow band in square brackets [ ]."8+8 !#"8+88 )#9,)#*&Connect an oscilloscope to monitor the waveform at TSP901 (TCXO PCB).Plug the microphone test lead into the control head microphone input socket.Apply a 1kHz sine wave.Slowly increase the sine wave output level until the waveform begins to distort(squaring), indicating that limiting has commenced.Any further increase in sine wave output level should not increase the amplitudeof the waveform."8+88 )#9!!,)*&Connect an oscilloscope to monitor the waveform at TP606 (logic PCB).Apply a 1kHz sine wave.Connect an EVM to the junction of R667 and C639.Increase the sine wave output level to 10dB above the limiting level, as describedin Section 4.5.1.1.Note the amplitude on the oscilloscope, then increase the output level by another10dB.Check that the amplitude of the waveform does not increase or distort signifi-cantly.The EVM should show a positive DC reading.
"81 "8+88 )#92*!#Connect the T2000 antenna output via a 30dB attenuator to a modulation meter.Plug the microphone test lead into the control head microphone input socket.Apply a 1kHz sine wave and adjust the output level to give a 3kHz (2.4kHz)[1.5kHz] deviation reading on the modulation meter.Connect a millivoltmeter across the input of the microphone test box and checkfor a reading of approximately 1mVrms on the millivoltmeter. The audio processor gain must be checked at a level below that at which theaudio ALC or limiting are influencing the measurements."8+8 )##"8+88 )#9!,&Connect the T2000 antenna output via a 30dB attenuator to a modulation meter.Plug the microphone test lead into the control head microphone input socket.Apply a 1kHz sine wave and increase the output level to 20dB above the limitinglevel, as described in Section 4.5.1.1.Vary the frequency of the sine wave generator between 0.3 and 5kHz.Note the reading on the modulation meter.The deviation should not exceed ±5kHz (±4kHz) [±2.5kHz].Between 450Hz and 3kHz (3kHz) [2.55kHz] the deviation should be within 4dB ofmaximum.Above 3kHz the deviation should decrease by more than 25dB/octave."8+88 )#967,&Decrease the sine wave generator output level to 10dB below the limiting level, asdescribed in Section 4.5.1.1.Sweep the sine wave from 0.3 to 10kHz.Note the reading on the modulation meter.From 300Hz to 3kHz (3kHz) [2.55kHz] the deviation should increase at the rate of6dB/octave (+1, -3dB) relative to 1kHz.Above 3kHz the deviation should decrease by more than 25dB/octave.
 "8"8+8 )#937))#Connect an RF power meter to the transmitter output.Select a channel programmed for high power (25W).Close the PTT switch.Vary the supply voltage between 10.8 and 16V.Above 13.8V the RF power output should not increase by more than 2W.At 10.8V the RF power output should be more than 16W.
"8 
 +8 This Section provides general fault finding assistance, and is intended to be used in con-junction with the circuit descriptions and block diagrams in Section 2 and the circuitdiagrams and PCB information in Section 7.The following topics are covered in this Section:Section Title Page5.1 Servicing Warning 5.25.2 Visual Checks 5.25.3 Component Checks 5.25.5.15.3.2 Transistor CheckIntegrated Circuit (IC) Check 5.25.25.4 DC Checks 5.35.5 Receiver RF Checks 5.45.5.15.5.25.5.3VCO FrequencyControl Line VoltagesRF Sensitivity5.45.45.55.6 Transmitter RF Checks 5.55.7 Trunked Radios: System Check 5.65.7.15.7.1.15.7.1.25.7.2Base Station CheckT2030 RadiosT2040 RadiosBase Station Control Channel Hunt5.65.65.65.65.8 Trunked Radios: Test Mode 5.75.8.15.8.25.8.2.15.8.2.25.8.35.8.3.15.8.3.25.8.45.8.55.8.5.15.8.5.25.8.6Test Mode OverviewManual Test Mode (MTM)T2030 & T2035 MTM OperationT2040 & T2050 MTM OperationComputer Controlled Test Mode (CCTM)CCTM SelectionCCTM ProtocolPower-Up StateTest Facilities AvailableResetting The RadioTest Facilities TableTrunked Radios: Radio Mode/Status Display Codes5.75.75.85.95.95.105.105.115.115.115.125.155.9 Options Interface Specifications 5.175.10 Fault Finding Charts 5.20
+8 +8 #BT2000 Series II radios require specialised servicing techniques. Before attemptingany disassembly or repair, refer to Section 3, “Introduction To Servicing”.Repairs attempted with incorrect equipment or by untrained personnel mayresult in permanent damage. If in doubt, contact Tait Electronics Ltd or yournearest Tait Branch or Subsidiary. +8 C)#9Check that the radio is suitable for the required frequency range and IF band-width (refer to Section 1.4, “Product Codes”).Check that the programmed frequencies are correct.Remove the covers from the T2000 and inspect the PCBs for damaged or brokencomponents, paying particular attention to the surface mounted devices (SMDs).Check for obvious mechanical faults in the PCBs, controls, microphone, etc.Check for defective solder joints. If repair or replacement is considered necessary, refer to Section 3.4, “Repair”.+8 )&)#9+8 8 )#9Measure the forward and reverse resistance of the transistor junctions, first mak-ing sure that the transistor is not shunted by some circuit resistance. A 20kΩ/V or better multimeter should be used for taking the measurements,using only the medium or low resistance ranges. Check the collector current drawn by the transistor.+8 8 $)#>$)?)#9Measure the DC operating voltages if the IC. Due to the catastrophic nature ofmost IC failures, the pin voltages will usually be markedly different from the rec-ommended values in the presence of a fault. The recommended values can beobtained from either the circuit diagram or the component data catalogue.
 +8 +8" ))#9Refer to the “Radio Won’t Switch On” fault finding chart in Section 5.10.1.Check all regulated supply voltages for the correct voltage levels. DC levels can bechecked using the voltage information on the circuit diagrams.
+8" +8+ #3)#9+8+8 C)*3(#Check that the VCO is phase locked.Connect a frequency counter (level +10dBm) to the VCO input to the mixer (junction ofC241 and L109).Monitor the local oscillator frequency and check that it is above or below the requiredreceive frequency according to the following list:+8+8 ),CThe following table gives approximate control line voltage for receive and transmit atthe band edges.Model Local Oscillator FrequencyT2000-100 27.7MHz belowT2000-200 10.7MHz aboveT2000-300 27.7MHz aboveT2000-400 27.7MHz below2000-500 49.1MHz belowT2000-600 49.1MHz belowT2000-700/900 49.1MHz belowT2000-800 61.9MHz belowModel Frequency(MHz)Receive Control Line Transmit Control LineVCO Frequency(MHz) Control LineVoltage (V) VCO Frequency(MHz) Control LineVoltage (V)T2000-100 220270 192.3242.3 4.5±0.59.8±1 220270 7.6±0.512.7±1T2000-200 6688 76.798.7 7.3±0.613.8±1 6688 4.5±0.611±1T2000-300 136174 163.7201.7 7.5±0.613±1 136174 4.5±0.69.2±1VT2000-400 175225 147.3197.3 4.5±0.610.6±1 175225 7.8±0.713.8±12000-500 400470 350.9420.9 2.5±0.513±1 400470 3±0.613.5±0.7T2000-600 450520 400.9470.9 2.5±0.513±1 450520 2.2±0.513.5±1T2000-700 330360 280.9310.9 2.5±0.56.3±0.7 330360 8.5±0.712.3±0.7T2000-800 851870 789.1808.1 1.8±0.54.5±0.5806825 3.8±0.56.5±0.5851870 9.5±0.512.0±0.5T2000-900 360400 310.9350.9 2±0.57.5±1 360400 8±112.5±1
 +8++8+8 3Refer to the “Synthesiser Faults”, “Receiver Front End Faults” and “Receiver IFFaults” fault finding charts in Section 5.10.Check that the VCO is on the correct frequency, and that the receiver is correctlyaligned.Check that the sensitivity into the front end is -119dBm (typical).If the sensitivity is low (less than -117dBm), the fault can be traced by measuringthe sensitivity into successive circuit blocks. Prepare a test cable by connecting a1nF capacitor to the end of a length of coaxial cable, as shown below. Before using the test cable, ensure the coax braid is connected to an earth pointon the PCB.Using the RF test cable, apply a modulated signal to test points in the first IF sec-tion, at the first IF frequency, as follows:Alternatively, apply an on-channel RF signal to the front end test points.Poor sensitivity indicates a fault in one of the circuit blocks following the testpoint. For typical sensitivity levels, refer to the fault finding charts. Poor sensitivity at the mixer input can be caused by lack of drive level from theVCO.+8- 3)#9Measure in-circuit RF levels with an RF probe. Typical RF levels can be found inthe “Transmitter RF Low Power Faults” fault finding chart, in Section 5.10.8. Shorten the RF probe earth lead to a minimum.Model First IF Frequency (MHz)T2000-100 27.7T2000-200 10.7T2000-300 27.7T2000-400 27.72000-500 49.1T2000-600 49.1T2000-700/900 49.1T2000-800 61.91nFCoaxTo Test CableConnect To Earth
+8- +8. 9)#9+8.8 6)#9This checks that the local base station repeater is on air and checks that the correct basestation frequency is programmed into the radio.+8.88 1 1Reprogram the first normal hunt channel to be the base station repeater channelnumber.Enter test mode (refer to Section 5.8, “Trunked Radios: Test Mode”).Press the front panel key, and the FFSK should be audible.+8.88 1"1Enter test mode (refer to Section 5.8, “Trunked Radios: Test Mode”).Enter the base station repeater channel number, and the FFSK should be audible.+8.8 6))=This checks that the radio is hunting the base station control channel. Refer to the“Trunked Radios: Radio Won’t Acquire A Control Channel” fault finding chart in Sec-tion 5.10.11. Do not enter test mode.Monitor pin 15 of IC510 (modem IC) on the T2030 or T2040 logic PCB, with ascope probe.FFSK should be visible for 100ms as the radio scans (hunts) through the channels.If the radio does not lock onto the required channel, this indicates one of the fol-lowing faults:• The parameters on the network identity page are incorrect.• The acquisition authorisation is incorrect.• The signal is not opening the mute (receiver mute fault, refer to the “ReceiverMute Faults” fault finding chart in Section 5.10.6).• The programmed logical channel number is incorrect (even if the frequenciesare correct).C4
 +8.+8/ 9+8/8 *7The test mode facility enables the trunked radio to emulate a multichannel radio, utilis-ing the frequencies reserved for trunking. The radio can then be tested and aligned, asdescribed in Section 4 and Section 6. There are two test modes provided: manual and computer controlled.•Manual Test Mode (MTM): Commands are entered and test results are displayedusing the keys, LEDs and the display on the control head.•Computer Controlled Test Mode (CCTM): Test commands are accepted via theserial port of the radio, and test results are returned as required. Although this modeis primarily intended for automated production testing, it may also be useful in thefield.No test facilities have been provided for functions relating to non-trunked operatingmode (e.g. CTCSS), as these functions can be easily tested in non- trunked mode.Within this Section, the following conventions apply:• Characters within “ “ indicate a string sent or received via the serial communica-tions port of the radio, e.g. a command code or an error code.• Numbers without “ “ are function numbers, manually entered via the control headin MTM to select particular test functions.) When in test mode, connect the antenna socket to a dummy load to pre-vent interference with trunking systems. Avoid testing on channels in uselocally.+8/8 >?Switch the radio off and remove the top cover.Place a temporary link across the two pads labelled TEST MODE on the logicPCB.Switch on the radio:•T2030 radios: all the front panel indicators will illuminate briefly.•T2035 and T2060 radios: the display will show “- -” for a short time.•T2040 radios: the control head will display “TEST MODE” for a short time.Remove the link. The radio will remain in test mode until it is next switched off.
+8/ In MTM, the following operations are common to T203X, T2040 and T2060 radios:• A short beep is sounded after every key press.• All models accept the reset command character (^).• The microphone PTT switch functions as in normal operation, i.e. a PTT press/release selects transmit and receive respectively.• LEDs or LCD annunciators are used to indicate transmit, synthesiser lock status andreceive signal detect status (refer to Table 5.2, “Radio Mode/Status Display”). MTM can also be selected by sending the MTM select command while inCCTM or program mode (refer to Table 5.1, “T2000 Test Facilities”), thenswitching the radio off then on again. This mode selection is ‘sticky’, in that the radio will always power- up in MTMif no serial device logs on, regardless of the state of the test link. This automaticmode selection can only be cleared by sending the appropriate command (referto Table 5.1, “T2000 Test Facilities”). Increment channels in MTM by shorting S14 pin 10 (/EMRGNCY) to ground.When the highest channel is reached, the next increment selects the lowestchannel.+8/88 1 141 +*&1 1Four preset channels are available via the four preset keys to , and theirassociated LEDs show the current channel. All four channels can be programmed to anyfrequency within the full coverage band of the radio.• selects the channel with the lowest number (i.e. the lowest channel in the net-work).• selects halfway between the highest and lowest channels available, roundingup to the nearest channel.• selects the channel with the highest number (i.e. the highest channel in thenetwork).• selects the first channel in the normal hunt list.1 +• To select a channel, enter the channel number required using the front panel keys,and press the key .• The key enables & disables the minimum shift keying (MSK) modemtransmit, and the LED momentarily shows status. Action of the key is push-on/push-off. When the modem transmit is enabled, the microphone audio is muted andwhen the modem transmit is disabled, the microphone audio is unmuted.When the radio is in receive, the modem transmit is temporarily disabled (and themicrophone audio is muted), but this is not shown by the LED.C1 C4C1C2C3C4
 +80• The key selects MSK modem transmit test patterns. The LEDis off for zeros, on for ones and flashing when preamble is being sent. Successivedepressions of the key will scroll through the three states. Whenever the key is pressed, the modem transmit is enabled unless the radio is in receive, inwhich case the LED will illuminate momentarily.• The key controls the transmit power output of the radio. The LEDis off for low power, on for high power and flashes when maximum power has beenselected. Successive depressions of the key will scroll through the three states. Each time the channel is changed, the transmit power is reset to the level pro-grammed for the new channel and is indicated by the LED.+8/88 1"141+1*&Test functions are selected by entering a two digit number followed by the key . Channels are selected by pressing the key (“Chan” will appear in the display),followed by a one to four digit channel number and terminated with the key.After every valid command execution, a confirmation will appear in the control headdisplay in the form of a message. A confirmation tone is also sounded. Entries that areinvalid for any reason, e.g. an invalid function or channel number, result in a displayedmessage and a warning tone.+8/8 )&)>))?In CCTM, test commands are accepted via the serial port of the radio and test results arereturned as required. To send and receive commands from the radio it is necessary torun a ‘dumb terminal’ emulation program on a PC.The serial communications port parameters are as follows:• Logic levels:Out: 0V = ‘1’, +5V = ‘0’In: -12V to 0V = ‘1’, +3V to +12V = ‘0’• A programming lead may be used to convert the output to RS232 voltage levels.• No handshaking (RTS, CTS etc. not implemented).•Full duplex.• 4,800 baud.• One start bit, eight data bits, one stop bit, no parity.• Flow control: Xon/Xoff
+81 +8/8 8 ))#After power-up, a reset command or a hardware reset, the radio sends the logon promptcharacter “v”. Replying with an ASCII “%” within 500ms of the prompt will put theradio in CCTM. The radio will confirm engagement of CCTM by sending the prompt “-”, preceded by a“CR”. If no reply is received within the required period, the radio will engage normaltrunked mode, or MTM if the test link is fitted or the ‘sticky’ MTM is active.If CCTM is engaged when the test link is fitted, the radio sends an error message andgives a unique error indication (refer to Table 5.2, “Radio Mode/Status Display”).While in CCTM, MTM can be selected (refer to Section 5.8.2). This will not come intoeffect until after the next power-up or reset. To re-engage CCTM without switching theradio off then on, a reset command can be sent to reset the radio and restart logonprompting.+8/8 8 ))#• The radio accepts commands in any of the following formats:-A two digit ASCII string selects the corresponding test function.-A “*” character followed by a one to four digit channel number (in ASCII) sets theradio to that channel.• Each command must be terminated with an ASCII “CR” character to initiate execu-tion of the command. -If the command requires no reply, the radio then responds with a “-” prompt char-acter.-If a reply is required, the radio responds with a data string followed by a “CR”and a “-” prompt . The “-” prompt indicates that the radio is ready to accept thenext command.• There is only ever a single reply string to any command.• Invalid commands, e.g. an invalid function number or channel number or invalidcharacters in a command, cause a “{C01}”, followed by “CR” and “-”, to be sent inreply, indicating a command error.• In CCTM the radio will accept a reset command character (refer to Section 5.8.5).• ASCII line feed characters are permitted at any time, but are ignored so that testcommands may be terminated with “CR” or “LF”.• All switches (including PTT, hook etc), keys and displays on the front panel or con-trol head of the radio are disabled while in CCTM, and no tones are sounded.
 +8+8/8" 7%&When manual or automated test mode is engaged after logon, the radio will be in thefollowing state, where applicable to particular radio models. The numbers in bracketsrefers to the test facility, as described in Table 5.1, “T2000 Test Facilities”.• Synthesiser programmed to the last selected channel.• Modem transmit off (13).• Force receive audio muted if in transmit mode (20).• Force receive audio unmuted if in receive mode (21).• Microphone audio muted if in receive mode (22).• Microphone audio unmuted if in transmit mode (23).• Radio power amplifier enabled (31).• Radio set to receive if PTT released on power-up (32).• Radio set to transmit if PTT pressed at power-up (33).• 13.8V switched supply on / ECN off (43).• Radio not in state for current measurement test (45).• Microprocessor clock rate set as programmed for the channel if in receive mode.• Microprocessor clock rate ‘normal’ if in transmit mode (70).• Radio transmit power set as programmed for the channel.The behaviour of the front panel or control head digital display and/or LEDs isdescribed in Table 5.2, “Radio Mode/Status Display”.+8/8+ 3#!+8/8+8 The radio may be reset at any time in any of the following ways:• Switch the radio off then on again.• Momentarily connect the microprocessor ‘reset’ pin to ground (pads are provided onthe enhanced control PCB).• Send a reset command character (^) over the serial communications port (refer toTable 5.1). The radio will not respond to the reset character after an EPROM or RAM testfailure.
+8 +8/8+8 3#The following table lists the test facilities available in MTM and CCTM for the T203X,T2040 and T2050. Facilities for the T2010, T2015 and T2020 are also listed for compari-son, and further information about the tests is listed following the table.Within the table, a ‘-’ indicates the corresponding facility is not available, and “nnnn” isa one to four digit channel number (leading zeros are permitted).T2010/T2015 T2020 T203X T2040/T2050Normal CCTM Normal CCTM Man Auto Man AutoSignalling functions:10. set modem to send zeros11. set modem to send ones12. set modem to send preamble13. disable modem Tx14. read modem Rx state15. disable subaudible signal16. enable subaudible signal17. read signalling decode status-----bychannelspeaker-------“17”-----bychannelspeaker-----“15”“16”“17”&keys----1011121314---10111213----“10”“11”“12”“13”“14”---Mute functions:20. force Rx audio muted21. force Rx audio unmuted22. mute microphone audio23. unmute microphone audio24. let squelch control Rx audio25. read squelch Rx busy status26. relax Rx audio mute control-l-MON*--s-MON-s-MON-“21”“22”“23”“24”-“26”-l-MON--s-MON-s-MON“20”“21”“22”“23”“24”“25”“26”-----“20”“21”“22”“23”“24”“25”-2021222324--“20”“21”“22”“23”“24”“25”-Radio Rx/Tx functions:30. inhibit the PA (Tx mode)31. enable the PA (Tx mode)32. set radio to Rx33. set radio to Tx34. set PA to low power35. set PA to high power36. set PA to max power37. relax PA power control--seebelowbychannel---“32”“33”“34”“35”“36”“37”--seebelowbychannel---“32”“33”“34”“35”“36”“37”----useorkey-“30”“31”“32”“33”“34”“35”“36”-30313233343536-“30”“31”“32”“33”“34”“35”“36”-Power supply functions42. 13.8VSW off /ECN on43. 13.8VSW on /ECN off44. set radio state for currentmeasurement45. cancel current measurementstate------------“42”“43”------“42”“43”“44”“45”4243--“42”“43”“44”“45”RSSI functions:61. Set L1 threshold62. set L2 threshold63. read averaged RSSI level64. read L165 read L2-----------------“63”-------“61”“62”“63”“64”“65”6162636465“61”“62”“63”“64”“65”Miscellaneous functions:70. select normal µP clock rate71. select birdie µP clock rate72. read synth. lock status73. relax µP clock control--------bychannel--“70”“71”“72”“73”----“70”“71”“72”-7071--“70”“71”“72”-FnFn
 +8 • In MTM, functions 10 - 13, 21, channel selection and PTT control of receive/transmitare all required for MPT1352 testing. Type approval testing requires the channelincrement facility using an external input.• All test function requests are valid when the radio is in either receive or transmit butsome functions (10, 11, 12, 21, 23 and 24) take effect only when the radio is in theappropriate mode.•10 - 13, 22, 23: When any of the functions which set the modem sending test data areselected (functions 10 - 12), the microphone audio is automatically muted. When themicrophone audio is unmuted using function 23, the modem transmit is disabled.When the radio is in receive, the microphone audio is temporarily muted and themodem transmit is temporarily disabled. This prevents any unwanted TCXOmodulation which may occur on radios with dual point modulation.These automatically selected states can be overridden until the next transmit toreceive transition. If microphone unmute or modem transmit enable is requestedwhen the radio is in receive, these functions will not be actioned until the radio isin transmit.•10, 11, 12: The two modem data states selected by functions 10 and 11 are ‘0’ =1800Hz tone and ‘1’ = 1200Hz tone respectively. Preamble, selected by function 12, isalternating 1800 and 1200Hz tones at a rate of 1200 baud.*‘l-MON’ & ‘s-MON’ indicate a long (>1s) and a short (<1s) press of the key , respectively.Special functions:92. set ‘sticky’ MTM93. clear ‘sticky’ MTM94. read serial number95. read factory model ID99. get current channel number-------“94”“95”--------“94”“95”------“92”“93”“94”“95”------“92”“93”“94”“95”-Radio channel control:select a channel T2010:to‘*n” chan “*nnn”T2030:to“*nnn” *nnn “*nnn”T2015:keysT2035:Selectchannel& pressSingle character commands:reset the radioselect programming modeselect auto test mode“^”“#”“%”“^”“#”“%”“^”“#”“%”“^”“#”“%”“^”“#”“%”“^”“#”“%”“^”“#”“%”“^”“#”“%”Radio controls & indicators:PTT press = select Tx modePTT release = select Rx modechannel increment inputTx indicatorsynth. out of lock indicatorRF signal detected indicatoryesyes-TxflashchanLEDBUSY---TxflashchanLEDBUSYyesyes-TxflashTX &BUSYBUSY------yesyespin 10, S14TXSVCGO------yesyesECRTXSVCGO------T2010/T2015 T2020 T203X T2040/T2050Normal CCTM Normal CCTM Man Auto Man Auto114C1C4
+8" •14, 25, 72: These functions return a Boolean radio status value, either a ‘0’ or a ‘1’, asfollows:•20: The receive audio is muted temporarily to quieten the speaker whenever theradio is in transmit. This state may be temporarily overridden until the next receiveto transmit transition. If ‘force Rx audio unmuted’ (21) or ‘let squelch control Rxaudio’ (24) is requested when the radio is in transmit, the function will not beselected until after the radio is in receive.•32, 33: Functions 32 and 33 are provided in MTM so that the radio transmit state canbe sustained without the need to hold the PTT depressed. Caution must be exercisedto prevent the power amplifier from overheating.•42, 43: Select economy/non-economy state. In economy state the audio poweramplifier is disabled and the front panel backlighting is set to its programmed econ-omy state. In non-economy state, the audio power amplifier is enabled and the back-lighting is set to its normal programmed state.•44, 45: Engage/disengage radio state for measurement of typical trunked mode sup-ply current drain. In this state only the ‘SVC’ and ‘C1’ LEDs are switched on andnon-economy state is selected (function 43). Upon disengagement, the previous dis-play is reinstated but the economiser state is not altered.•61, 62: To set up the RSSI thresholds, apply an RF signal to the radio (on an appropri-ate receive channel) at the threshold level. Allow at least 400ms for the RSSI averag-ing to settle, then select function 61 or 62 as required.The averaged RSSI threshold value (in decimal full scale = 255) is either displayed ifin MTM or returned via the serial port if the radio is under computer control. Thevalue is also stored in the radio’s database (in the microprocessor EEPROM) and thedatabase checksum is automatically updated.•63: In MTM, function 63 gives a regularly updated display of the averaged RSSIvalue. The leftmost decimal point will light when the RSSI level equals or exceedsL1, and the rightmost decimal point will light when the RSSI level equals or exceedsL2.In CCTM a single averaged RSSI value is returned.At least 400ms should be allowed after any change in signal level for the returnedvalue to be accurate.•94: Returns the serial number part of the radio’s ESN as a number of up to 6 digitswith leading zeros suppressed.•95: Returns the factory programmed ‘factory model ID’ as a string of six decimaldigits.•99: This function is intended to allow easy modification of the current channelnumber via the number entry keys.Return Value ‘0’ ‘1’14 - read modem Rx state data = 0 data = 125 - read Rx busy state no RF signal detected RF signal detected72 - read synth lock status out of lock in lock
 +8++8/8- 9&)The mode or status of the radio is indicated by the behaviour of:• the monitor LEDs (ML1 and ML2) on the top side of the logic PCB• the radio control head LEDs.Unless otherwise stated, the two monitor LEDs behave as in normal operation:• ML2 is off• ML1 flashes at a rate of 1Hz to indicate watchdog timer ‘kick’ activity• In normal trunked radio mode, ML2 flashes at a rate of several Hertz. This indicatescontrol channel hunt or codeword reception on a control channel.A value in brackets { } with a mode/status description indicates that the radio sends anerror message via the serial port upon engaging that mode/status.This table identifies display states for trunked radios, with non-trunked models forcomparison.Mode/State T2010/T2015 T2020 T2030/T2035 T2040CONFIG errorMonitor LEDs flashing together. Display shows “CONF-ERR”Monitor LEDs flashing together. Top & bottom row LEDs flashing. C1 LED on (if fitted)Monitor LEDs flashing together. Display shows “CONF-ERR”CONFIG register programmed Display shows “CONF-PGM” Display undefined Display shows “CONF-PGM”ROM or RAM test failureCTCSS output tog-gling. Display undefinedTone output tog-gling. Display undefinedTone output tog-gling. LEDs unde-finedTone output tog-gling. Display undefinedESN checksum error {X31}(go to program mode)As for program mode + CLR LED flashing. T2035: dis-play shows “-U1”Display shows “ESN-ERR”Database checksum error {X32} (go to program mode)As for program mode.2010: all channel LEDs on2015: display shows “00”Display shows “-PROG-” Top row LEDs onAs for program mode + DESP LED flashing.T2035: display shows “-U2”Display shows“-DATA-ERR-” Top row LEDs on.System error{Enn}Monitor LEDs alternately flashing “-ERROR nn” in display (nn = error mumber)Monitor LEDs & top row LEDs flash-ing.2 digit BCD error number on bottom rows.T2035: display flashes error numberMonitor LEDs alternately flashing. “ERROR nn” in dis-play (nn = error mumber)MOBD link left in & CONFIG register OK{X06}Display error shows “MODB-ERR”Top & bottom row LEDs flashing + C2 LED on (if fitted)Display shows “MODB-ERR”Logon with test link in{X07}Top & bottom row LEDs flashing + C3 LED on (if fitted)Display shows “TLINK-ERR”Key/LED test failure{X04}LED flashing shows error - all LEDs to right & below on
+8- Program mode2010: all channel LEDs on2015: display shows “00”Display shows “-PROG-” Top row LEDs onTop row + C1 LEDs all on (if fitted)T2033/35: display shows “-UU”Display shows“-PROG-”Top row LEDs onCloning modeAUX LED flashing. AUX/SCAN LEDs flash if clone failed. Target radio in pro-gramming mode.Display shows “CLONING” Top row LEDs on. Tar-get radio in pro-gramming mode.Manual Test Mode(MTM)All LEDs on for a short time then indicate radio sta-tus.C1 to C4 show last channel (if fitted).T2035: display shows “- - -” brieflyDisplay shows “chan xxxx” (xxxx = last channel number). LEDs indicate radio sta-tusKey pressed at power-up(control head test)[AUX] = clone[CALL] = program Any key on the control head & any mode. All LEDs & all LCD segments are set flashing indefi-nitelyC1 key (if fitted) in MTM- a front panel key/LED test is initi-ated - all LEDs on initiallyAny key on the control head & any mode. All LEDs & all LCD segments are set flashing indefinitelyComputer Control-led Test Mode(CCTM)Front panel shows normal radio state (not a separate mode)Display shows “-AUTOTEST-” Top row LEDs onTop row + C2 LEDs (if fitted) all on.T2035: display shows "- - -" contin-uouslyDisplay shows “AUTOTEST” Top row of LEDs onCCI modeNormal display“CCI BUSY” & top row LEDs on when processing a com-mand or in ‘lockout all’ modeNormal display “CCI BUSY” & top row LEDs on when processing a com-mand or in ‘lockout all’ mode.Normal radiomodeNo special power-up sequence - nor-mal radio state immediatly dis-playedProgrammable power-up message displayed for a short time then nor-mal radio display (default mode)T2030: own number as CD on 3 rows of LEDs, then last number on C1 to C4 & DESP LEDs. Others as labelled.T2035: Own number briefly on display, then last number called.Own number dis-played for a short time after power-up then program-mable power-up message followed by normal radio displayPTT on power-up in MTM or normal modeSoftware version # indicated for a short time as “h.nn”. “h” is shown with the Busy and TX LEDs as a hex number. “n’s” are indicated by the two lower rows of LEDs (2010), or by the channel display (2015).Display shows “xxxx nn.mm” for a short time, nn = major, mm = minor version number T2030: 3 rows of LEDs display the software version # for a short time as h.nn (h is a hex number) then as per selected mode.T2035: software version numberon display.Display shows “xxxx nn.mm” for a short time, nn = major mm = minor version number, then as per selected modeMode/State T2010/T2015 T2020 T2030/T2035 T2040
 +8.+80 *&$#&##The options connectors, S13 and S14, are located on the top side of the T2000 logic PCBs,and are provided for use with plug-on accessory PCBs. The following tables describe the signals available on these connectors, and also on S15(T2010 & T2015 logic PCB).*Ω ΩConnection(to/from) PinNo. Usedfor Level for 1kHzAF 60% FM Z1ΩZ0ΩMin.ZLDCLevel SlopedB/8LF-3dBHzHF-3dBHzDET-AF-OUT(from detector via3kHz LPF)S13-1 CTCSSdata, DCS,Selcall400mVp-p <1k 1k 3.3V flat 10 3.4kALC-IN(to compressor) S13-2 0.2Vp-p 2.2k 0V +6 0.25k 3.4kRX-LINE-OUT(de-emphasisedreceiver audio)S13-3 to accessoryline interface 0.4Vp-p 100 10k 3.3V -6 0.23kor0.35k3.4kTX-LINE-OUT(from ALC) S13-4 to accessory 1.2Vp-p <1k 1k 3.3V flat 70 33kRX-LINE-IN(to squelchelement)S13-5 fromaccessory 0.4Vp-p 5k*3.3V flat 0.18k 20kTX-LINE-IN(to pre-emphasis) S13-6 fromaccessoryline interface1.2Vp-p 5k*3.3V +6V 0.25k 3kRX-GTD-AF(Rx Audio fromafter squelch)S13-7 line interface 0.4Vp-p 10k 0.2M 3.3V flat 0.23kor0.35k3.4kTX-SIG-IN(to limiter) S13-8 data Selcall 2.5Vp-p 470k 3.3V flat 4 3.4kRX-BEEP(to AF PA with min.volume stop)S13-9 sidetone 0.5Vp-p 470k AC flat 0.18k 20kTX-LF-SIG(to LPF) S13-10 CTCSS, DCS 5.0Vp-p for12%deviation2.2k 3.3V flat 4 3.4kOPTIONS-GND(connected toground on RF PCB)S13-11Connection(to/from) Pin No. Function Available Current+13.8V-UNSW S13-12 - emergency: to bypass the on/off switch 0.5A+13.8V S14-1 - supply to options with own regulators 200mA (remote loom resist-ance = 0.43Ω/loop meter)+5V S14-2 supply to options 150mA
+8/ The following table shows the BCD codes for T2010 and T2015 radios under externalchannel control. T2010 has 4 channels accessible by BCD and T2015 has 24 channels accessible byBCD* Refer to BCD selection table.Connection PinNo. Function LogicLevels LogicSense SinkImaxSourceImax ZinBUSY S14-3 carrier detectopening time: <35msclosing time: <20ms(8dB sinad, 6dB margin)0V 5V 0V = busy 0.5mA 0.1mARX-GATE S14-4 Rx audio gate information 5V CMOS 5V = audio 1.5mA 0.3mA/PTT-TO-OPT S14-5 from mic.; linked to 18 pull-up 0V = Tx 1.5mA 50µA 2k7/PTT-FRM-OPT S14-6 Tx 5V CMOS 0V = Tx CMOS/IN-LOCK S14-7 synthesiser lock detect(lock-up time: <20ms) 0V 5V 0V = lock 0.2mA 0.2mAMIC-MUTE S14-8 disables AF from mic. only 5V CMOS 5V = mute 200k/SIG-SQLCH S14-9 Rx audio gate control open c. 0V = AF muted 47k/EMERGNCY S14-10 starts s/w sequence open c. 0V = emergency 10kCALL-SW S14-11 front panel control 5V CMOS 1.5mA 0.3mAHUSH S14-12 car radio mute output 5V CMOS 1.5mA 0.3mAAUX-ON/OFF S14-13 front panel control 5V CMOS 1.5mA 0.3mAHORN S14-14 Selcall horn alert 5V CMOS 1.5mA 0.3mARSSI S14-15 Rx signal strength 0 - 50µA 0.8µA/dBEXTERNAL S14-16 line to power plugBCD0BCD1BCD2BCD3BCD4BCD5S15-9S15-10S15-11S15-12S15-13S15-13channel change optionon T201X*0 - 5V CMOS 0V = 05V = 1 10kBCD Channel Number Codes BCDNumber ChannelNumberBCD-5 BCD-4 BCD-3 BCD-2 BCD-1 BCD-0000000 0 1000001 1 2000010 2 3000011 3 4000100 4 5000101 5 6
 +80)#-:./Additional microprocessor control signals are available on the T2020, T203X, T2040,T2050 and T2060 HC11 logic PCB (PCB IPN 220-01344-0X), on connectors S16, S17 andS18.000110 6 7000111 7 8001000 8 9001001 9 10010000 10 11010001 11 12010010 12 13010011 13 14010100 14 15010101 15 16010110 16 17010111 17 18011000 18 19011001 19 20100000 20 21100001 21 22100010 22 23100011 23 24BCD Channel Number Codes BCDNumber ChannelNumberBCD-5 BCD-4 BCD-3 BCD-2 BCD-1 BCD-0
+81 +81 33)The fault finding charts listed below are intended to be used in conjunction with the cir-cuit diagrams and other PCB information found in Section 7, and with the circuitdescriptions and block diagrams found in Section 2.Section Title Page5.10.1 Radio Won’t Switch On 5.215.10.2 Radio Won’t Program 5.225.10.3 Synthesiser Faults 5.235.10.4 Receiver Front End Faults 5.245.10.5 Receiver IF Faults 5.255.10.6 Receiver Mute Faults 5.265.10.7 No Audio On Receive 5.275.10.8 Transmitter RF Low Power Faults 5.285.10.9 Transmitter Power Control Faults 5.305.10.10 Transmit Audio Absent 5.315.10.11 Trunked Radios: Radio Won’t Acquire A Control Channel 5.32
 +8+818 BD7#*
+8 +818 BD
 +8 +818 3
+8" +818" #3'3
 +8++818+ #$33
+8- +818- #3
 +8.+818. A!*#
+8/ +818/ 3,773≥≥≥≥≥≥≥≥≥≥≥≥≥≥≥≥≥≥≥≥≥≥≥≥
 +80≥≥≥≥≥≥≥≥≥≥≥≥≥≥≥≥
+8 1 +8180 7)3
 +8 +8181 !!
+8  +818 9BD!#(!))
 ! -8-4!5This Section details procedures for tuning and adjustment of T2000 series II radios. Thisis normally only required during product manufacture or after major servicing.The following topics are covered in this Section:Section Title Page6.1 Tuning Precautions 6.26.2 Tuning & Adjustment Points 6.36.3 Trunked Radios 6.56.4 Transmitter Adjustments 6.56.4.16.4.26.4.36.4.46.4.76.4.56.4.76.4.86.4.8.16.4.8.2Power OutputTCXO AlignmentDual Point Modulation AdjustmentCTCSS Modulation AdjustmentModulation AdjustmentLTR Code Deviation AdjustmentSelcall Tone DeviationFFSK Adjustment (Trunked Models Only)T203X RadiosT2040 Radios6.56.66.66.76.76.76.76.86.86.86.5 Receiver Adjustments 6.96.5.16.5.26.5.36.5.3.1RF AlignmentInternal Mute ControlRSSI‘L’ Level Set-Up (Trunked Radios Only)6.96.106.106.10
-8  !-8 #Refer to Section 4.1 for a list of test equipment required and a suggested test set-up. Thefollowing precautions must be observed when carrying out the alignment procedures inthis Section.• The microprocessor shield must remain in place throughout the alignment proce-dure, with its 3 retaining screws torqued down to 8in.lbf (0.9Nm).To gain access to the alignment test points and adjustment controls, it is only neces-sary to remove the top cover and logic PCB mounting screws (refer to Section 3.2.1).• For accurate tuning, the test cable connecting the signal generator or power meter tothe T2000 must be as short as practical and fitted with a ‘mating’ BNC connector.Do not use adaptors, ‘sniffer’ couplings, etc., which introduce changes to cableimpedance and errors in test results.• Non-metallic tuning tools must be used for the alignment of all coil slugs. The use ofmetallic tools will result in tuning errors.Tuning tools need to be of correct size to avoid the damage to coil slugs.• The RF PA and audio output IC have a direct unswitched supply, and are thereforenot controlled by the control head on/off switch. This switch removes power onlyfrom the regulated supplies.) Under certain circumstances the microprocessor can key the transmitter.Ensure that all instruments are protected from accidental PTT at all times.
 ! -8 -8 4!5The following table lists tuning and adjustment points, and Figure 6.1 shows their posi-tion on the RF and TCXO/Tx audio PCBs. The PCB layouts in Section 7 have all relevant logic PCB test and adjustment pointsmarked.Tuning/Adjustment Point:Designator Function LocationRV153 internal squelch controlRF PCBRV222 dual point modulation controlRV324 high power controlCV212 x4 multiplier (only used in T2000-800)L104 to L106 front end tuning(not used in T2000-800)L114 & L116 IF tuningL119 quad coilL203 x3 /x4 multiplier(not used in T2000-200)RV906 CTCSS deviation control TCXO/Tx audio PCBRV907 deviation controlRV923 frequency controlRV507 low power controllogic PCB#RV508 T2010, T2015 & T2020: signalling adjust (not fitted as standard)#RV599 T203X, T2040, T2050 & T2060: FFSK adjustTest Points:Designator Function LocationTSP901 dual point modulation test point TCXO/Tx audio PCBTP601 Rx audio (detected)logic PCBTP602 Tx CTCSSTP603 Rx CTCSSTP604 Rx audioTP605 Tx audioTP606 ALC audioTP607 pre-amp output
-8"  !
 ! -8+-8 9The ‘test’ facility enables T2000 trunked radios to emulate a multichannel radio, usingthe frequencies reserved for trunking. For a description of how to put the radio in test mode, refer to Section 5.8 “TrunkedRadios: Test Mode”. Once the radio is in test mode, tuning and adjustment can be car-ried out as described in Section 6.4 and Section 6.5.) When in test mode, connect the antenna socket to a dummy load to pre-vent interference with trunking systems. Avoid testing on channels in uselocally.-8" !5In this Section, deviation settings are given first for wide band, followed by settings formedium band in brackets ( ) and settings for narrow band in square brackets [ ].-8"8 7*&Set up the test equipment as shown in Section 4, and close the PTT switch.Turn RV324 fully clockwise and check that the output power is greater than 30Wfor all channels.Select a channel programmed for high power and adjust RV324 for 25W.Check that the transmit current is approximately the values stated below:Select a channel programmed for low power and adjust RV507 for the requiredoutput power.Model CurrentT2000-100 6AT2000-200 6AT2000-300 6AT2000-400 6AT2000-500 6.5AT2000-600 7AT2000-700/900 6.5AT2000-800 6A
-8-  !-8"8 );*!Close the PTT switch and monitor the transmit frequency with a frequency coun-ter.Adjust RV923 on the TCXO/Tx audio PCB for a channel frequency within ±100Hzat ambient temperature.-8"8 !5DC isolate the audio generator from TSP901 using a capacitor (10µF is sufficient).Set the audio generator to 7kHz and inject the audio into the dual point modula-tion input TSP901 on the TCXO/Tx audio PCB.Close the PTT switch and select the lowest frequency channel.Adjust the audio generator level to give a reading of ±5.2kHz deviation on themodulation meter.Remove any filters selected on the deviation or modulation meter which couldgive erroneous readings.Select the highest frequency channel and check that the deviation is ±4.8kHz.If not, adjust the audio generator output level so that the average deviation of thetwo channels is ±5kHz.The difference in deviation between the two channels must be less than±800Hz.Select the lowest frequency channel, set the audio generator to 70Hz and injectthe audio at TSP901.Adjust RV222 to give ±4.8kHz deviation on the modulation meter.Select the highest frequency channel and check that the deviation is ±5.2kHz.If not, adjust RV222 so that the average deviation of the two channels is ±5kHz.The difference in deviation between the two channels must be less than±400Hz.
 ! -8.-8"8" ))!5The following instructions apply only to those radios with CTCSS activated andmust be carried out before any further modulation adjustment can proceed.Refer to the T2000 Programming Manual for the CTCSS channel programminginstructions. The frequency range of the CTCSS tone is 67 to 250.3Hz.Switch to any channel with CTCSS activated.Close the PTT switch.Adjust RV906, on the TCXO PCB, to set the CTCSS tone peak deviation for±660Hz ±100Hz (±530Hz ±80Hz) [±330Hz ±50Hz] on the modulation meter.-8"8+ ,)!5Close the PTT switch and set up a continuous call. This can be an LTR RepeaterTalkaround call, a Repeater Interconnect Call (RIC) or an on-channel call.Adjust RV906 on the TCXO PCB to set the LTR code deviation to ±1kHz (±900Hz)[±600Hz].A The deviation meter must have a good low frequency response to avoid incor-rect readings.-8"8- !5Complete the dual point modulation and CTCSS modulation adjustments (Sec-tion 6.4.3 and Section 6.4.4) before commencing the modulation adjustment.Apply a 3kHz sine wave at a level of -40dBm to the microphone input.Select a channel with CTCSS activated and close the PTT switch. If CTCSS is disa-bled, select any channel.Adjust RV907 for a +5kHz (+4kHz) [+2.5kHz] deviation reading on the modula-tion meter.Maintain the same sine wave output level and sweep the audio frequency from300Hz to 3.3kHz.Find the frequency of maximum ‘+’ deviation and readjust RV907 for +5kHz(+4kHz) [+2.5kHz] deviation.Reset the modulation meter to read ‘-’ deviation.Slowly sweep the audio frequency from 300Hz to 3kHz. If the ‘-’ deviation peak isfound to exceed -5kHz (-4kHz) [-2.5kHz], readjust RV907 for a peak deviation of-5kHz (-4kHz) [-2.5kHz] at that frequency.The peak deviation should not exceed ±5kHz (±4kHz) [±2.5kHz] on any channel.
-8/  !-8"8. #This is normally preset at 60% of voice deviation. If adjustment is needed, fit#RV508 (refer to Section 7 for a component description) to the logic PCB, and pro-ceed as follows.Adjust #RV508 for ±3kHz (±2.4kHz) [±1.5kHz] deviation reading on the modula-tion meter.Check to ensure that no limiting occurs in IC901.-8"8/ 33E!5>9*?-8"8/8 1 ;Enter test mode (refer to Section 5.8, “Trunked Radios: Test Mode”).Press the front panel # key .Adjust #RV599 for ±3kHz ±200Hz (±2.4kHz ±160Hz) [±1.5kHz ±100Hz] deviationreading on the modulation meter.-8"8/8 1"1Enter test mode (refer to Section 5.8, “Trunked Radios: Test Mode”).Select test function 10 using the control head.Adjust #RV599 for ±3kHz ±200Hz (±2.4kHz ±160Hz) [±1.5kHz ±100Hz] deviationreading on the modulation meter.2
 ! -80-8+ #!5In this Section, deviation settings are given first for wide band, followed by settings formedium band in brackets ( ) and settings for narrow band in square brackets [ ].-8+8 3!Set up the test equipment as shown in Section 4, and select the highest possiblefrequency in the operating band.Set the signal generator to the required receive frequency with modulation set for±3kHz (±2.4kHz) [±1.5kHz] deviation at 1kHz AF and an output level of-100dBm.Using the receiver tuning amplifier circuit shown in Figure 6.2, adjust RV1 untilthe voltage of point A equals 3.0V DC, measured on a 1MΩ digital multimeter.Connect the receiver tuning amplifier to the RSSI output on pin 15 of S14 (logicPCB) and monitor the output on an oscilloscope (1V/division, DC coupled).If the output on the oscilloscope is 0V DC, increase the RF input level above-100dBm until the output level just starts to rise.Adjust L104, L106, L105, L114, L116 and L203, in this order, to give maximumamplitude.A L203 is not used in the T2000-200.While tuning the coils, adjust the signal generator output so that the level on theoscilloscope does not exceed 6V DC.Monitor the audio output at the speaker terminals and adjust L119 for maximumamplitude.Set the squelch control (RV153) to minimum and connect a sinad meter across thespeaker terminals.Decrease the signal generator output until a 12dB sinad is reached.The signal generator output should not be greater than -117dBm.Switch to the lowest possible frequency in the operating band, and check that thereceiver sensitivity is better than -117dBm.C21µFR310kRV1100k(26 turn)IC1LM358123+-R112kinputfromRSSIR2390k+9V DCoutput tooscilloscope1V/div.(DC coupled)C11µF++A = 3V DC
-81  !-8+8 $)If required, the mute setting can be adjusted internally as follows.Align the receiver, as described in Section 6.5.1.Adjust RV153 fully clockwise.Set the signal generator to the required receive frequency.Set the modulation for ±3kHz (±2.4kHz) [±1.5kHz] deviation at 1kHz AF.Adjust the signal generator output for 11dB sinad.Adjust RV153 so that the radio mutes then turn RV153 until the mute gate justopens.-8+8 $The T2000 RSSI is non-adjustable and should operate over an approximate 50dBrange.Monitor the RSSI output on pin 15 of S14 on the logic PCB.Set the signal generator to the required receive frequency with modulation set for±3kHz (±2.4kHz) [±1.5kHz] deviation at 1kHz AF and an output level of -70dBm.Decrease the signal generator output in 10dB steps to -120dBm, noting the RSSIoutput at each step.The RSSI should have a typical slope of approximately 540mV/10dB, from-120dBm to -70dBm RF input.-8+8 8 F,D,%&>9*?These levels are factory set at the time of manufacture and will require reprogram-ming only if the receiver has been realigned or has had parts replaced, or if thelogic PCB has been replaced.Set the signal generator to give an unmodulated RF signal in the centre of thetrunking band.Enter test mode.A The T203X will need to use CCTM, as described in Section 5.8.3.Set the signal generator to -108dBm and program ‘L1’ (function 61), as describedin Section 5.8.5.2.Set the signal generator to -100dBm and program ‘L2’ (function 62), as describedin Section 5.8.5.2.

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