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Instruction Manual
1705A
SpectrumMonitor(SNB040000 and Above)
070-8222-08
Warning
The servicing instructions are for use by qualified
personnelonly.To avoid personalinjury,do not
perform any servicing unless you are qualified to
do so. Refer to all safety summaries prior to
performing service.
www.tektronix.com
Test Equipment Depot - 800.517.8431 - 99 Washington Street Melrose, MA 02176 - FAX 781.665.0780 - TestEquipmentDepot.com
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TableofContents GeneralSafetySummary.............................................. ix ServiceSafetySummary .............................................. xi Preface ............................................................. xiii Contacting Tektronix xv Introduction Section1Introduction ................................................ 1--1 Typical Configurations ................................................... 1--1 Options ............................................................... 1--2
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TableofContents Vertical Scales ...................................................... 2--7 Horizontal Scales .................................................... 2--9 Center Frequency Readout ................................................ 2--11 Customizing Frequency Readout ........................................... 2--14 Turning On or Off Readout ............................................ 2--14 Changing Readout Position ............................................ 2--14 Changing Readout F
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TableofContents RampGenerator..................................................... 4--7 Gain Control (SPAN/DIV)............................................. 4--7 SweepShapers ...................................................... 4--7 Bright--Up Generator ................................................. 4--8 Z--AxisControl ..................................................... 4--9 DeflectionAmplifiers Diagram 4 .................................................. 4--9 Buffers ....................
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TableofContents Short--Form Procedure ................................................ 5--17 Long Form Procedure ................................................ 5--18 Maintenance .......................................... 6--1 Section 6Maintenance ................................................ 6--1 PREVENTIVE MAINTENANCE .......................................... 6--1 Cleaning ........................................................... 6--1 Visual Inspection ..................................
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TableofContents ReplaceableElectricalParts Section 8ReplaceableElectricalParts ................................... 8--1 PartsOrderingInformation ................................................ 8--1 Usingthe Replaceable Electrical PartsList ................................... 8--1 CrossIndex--Mfr. Code Number to Manufacturer........................... 8--1 Abbreviations....................................................... 8--1 List of Assemblies ................................................
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TableofContents ListofFigures Figure1-1:1705Ausedtolocatesatellites anddeterminemaximumsignallevel ......... 1--2 Figure1-2:Relationshipofacommunications satellitetoearth ....................... 1--9 Figure1-3:AngleA(thedifferenceataspecificlatitudebetweentheangletothesun andtheangletoasatellite) ......................................... 1--10 Figure1-4:SamplelongitudinalmapoftheKu-Bandsatellites ....................... 1--11 Figure1-5:ThewesternspotbeamfootprintforoneKu-Bandsatellite ..........
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TableofContents Figure3-8:Considerations forcustominstallationofaninstrument.................... 3--8 Figure4-1:1705AL--Bandcombdisplayshowingtheareas each ofthesix sweep shaper variableresistors adjust............................................. 4--8 Figure4-2:Outputdutycycleofthepulsewidthmodulatorusedinthe+18VPowerSupply 4--13 Figure4-3:PinoutoftheCRTSocket ........................................... 4--19 Figure5-1:Initialequipmentconnections ........................................ 5--6 Fi
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TableofContents ListofTables Table1--1:SpectrumDisplay ................................................. 1--4 Table1--2:CRTDisplay ..................................................... 1--5 Table1--3:PowerSource .................................................... 1--5 Table1--4: EnvironmentalCharacteristics ....................................... 1--6 Table1--5: Physical Characteristics ............................................ 1--6 Table1--6:Certifications andCompliances ...................
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GeneralSafetySummary Review thefollowing safety precautions to avoid injury and prevent damageto this productoranyproducts connectedtoit. Toavoidpotentialhazards, usethis productonlyas specified. Onlyqualified personnel should perform serviceprocedures. Whileusingthis product, youmayneedto access otherparts ofthesystem. Read theGeneral SafetySummaryinothersystemmanuals forwarnings andcautions relatedtooperatingthesystem. ToAvoidFireor UseProperPowerCord.Useonlythepowercordspecifiedforthis produc
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General Safety Summary ProvideProperVentilation.Refertothemanual’s installationinstructions for details oninstallingtheproductsoithas properventilation. SymbolsandTerms TermsinthisManual.Theseterms mayappearinthis manual: WARNING.Warning statements identifyconditions or practices that could result in injuryor loss of life. CAUTION.Caution statements identifyconditions or practices that could result in damageto this product or other property. TermsontheProduct.Theseterms mayappearontheproduct: DA
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ServiceSafetySummary Onlyqualifiedpersonnelshouldperformserviceprocedures. ReadthisService SafetySummaryand theGeneral SafetySummarybeforeperforming any service procedures. DoNotServiceAlone.Donotperforminternalserviceoradjustmentsofthis productunlessanotherpersoncapableofrenderingfirstaidandresuscitationis present. DisconnectPower.Toavoidelectricshock, switchofftheinstrumentpower, then disconnectthepowercordfromthemainspower. UseCautionWhenServicingtheCRT.Toavoidelectricshockorinjury, use extre
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ServiceSafetySummary xii 1705ASpectrumMonitor
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Preface Theinformationinthismanualisintendedforinstrumentoperatorsandservice technicians. Operatorsareassumedtobefamiliarwithbasictelevisiontermsand measurements. Qualifiedservicetechniciansarealsoassumedtobefamiliarwith televisiontermsandmeasurements, andhavemoderateexperiencewithanalog andlogiccircuits. Themanualisdividedintotwoparts: Operator’sInformationandService Information. TheOperator’sInformationisusefultobothoperatorsandservice technicians. TheServiceInformationisintendedonlyforqualifi
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Preface Section7,Options Section7, Options, documentsinstrumentoptions. Theinformationinthis sectionsummarizestheoptions. Additionaldetailsareincludedinappro-priate places throughoutthemanual. Section8,Replaceable Section 8, ReplaceableElectrical Parts, includes orderinformation and part numbers forall replaceableelectrical parts. ElectricalParts Section9,Diagrams Section9, Diagrams, containsservicingillustra-tions. Theseincludeadjustment locations, circuitboardpartlocations, ablockdiagram, ands
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Preface ContactingTektronix Phone 1-800-833-9200* Address Tektronix, Inc. Department orname (ifknown) 14200SW Karl BraunDrive P.O. Box500 Beaverton, OR97077 USA Web site www.tektronix.com Sales support 1-800-833-9200, select option1* Service support 1-800-833-9200, select option2* Technical support Email: techsupport@tektronix.com 1-800-833-9200, select option3* 6:00a.m. -- 5:00p.m. Pacific time * This phone numberis toll free in North America. Afteroffice hours, please leave a voice mail messag
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Preface xvi 1705ASpectrumMonitor
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Introduction
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Section1 Introduction TheTEKTRONIX1705ASpectrumMonitorisan8½”wideby5¼”high specialpurposespectrumanalyzer. Itweighsapproximately8½ poundsandis poweredfromanacsource. Thecrtoccupiesapproximatelytwo-thirdsofthe front-panel area, with thecontrol panel taking up theremainderofthespace. Operationiscontrolledbyamicroprocessorthatpollsthefront-panelswitches. Front-panelswitchesareofthemomentarytouchtypewithlightedfunctional indicators. Inadditiontopollingthefrontpanel, themicroprocessorprovides thechar
