Tektronix 2707 User manual

Instruction Manual
Warning
The servicinginstructions are for use by qualified
personnel only. To avoid personal injury, do not
._. perform any servicing unless you are qualified to
- - do so. Refer to all safety summaries prior to
. performing service.

Instrument Serial Numbers
EachinstrumentmanufacturedbyTektronix has a serial numberon a panelinsertor tag, or stamped onthe
chassis. Thefirst letter inthe serial number designates thecountryof manufacture. The last five digitsof the
serial numberare assignedsequentially andare uniqueto each instrument. Those manufacturedinthe
UnitedStates havesix unique digits. The countryof manufacture is identifiedas follows:
BOl0000 Tektronix, Inc., Beaverton,Oregon, USA
E200000 Tektronix UnitedKingdom,
Ltd., London
J300000 Sonyflektronix, Japan
H700000 Tektronix Holland,
NV, Heerenveen, The Netherlands
Instrumentsmanufacturedfor Tektronix byexternalvendors outsidethe UnitedStates are assigned a two digit
alphacodeto identifythe country of manufacture(e.g., JPfor Japan, HK for HongKong, ILfor Israel,etc.).
Tektronix, Inc., PO. Box 500, Beaverton, OR 97077
Printedin U.S.A.
Copyright O Tektronix, Inc., 1993. All rightsreserved. Tektronix productsare covered by U.S. and foreign
patents, issuedand pending. Thefollowing are registeredtrademarks: TEKTRONIX,
TEK, TEKPROBE, and
SCOPE-MOBILE.

-m .......... Table of Contents
,... ...,o-
Preface .....................................................
GeneralSafetySummary .....................................
ServicingSafety Summary ...................................
Introduction
............ ..................................
Introduction
Accessories ..........................................
Options ..............................................
e*.
xi
xiii
xvii
Getting Started 4 . .
........
......................
GettingStarted .-. 2-1
................................. MechanicalConnections 2- 1
Preparingthe Spectrum Analyzer ....................... 2-1
. .,,,, , Preparingthe ExternalTracking Generator. ...............
2-1
......................
... - Attachingthe InstrumentsTogether
2-3
...................................
ElectricalConnections 2-3
....................
. .q Usingthe ExternalTrackingGenerator
2-4
..* a ~unctionalcheck ........................................
d
2-6
---.
.
... -ff-
....... k
Operation
...................................................
Operation
Controls and Connectors .................................
Front Panel ...........................................
...........................................
Rearpanel
.....................................
Power Requirements 3-3
................................
Power CordInformation 3-3
Operating Voltage ..................................... 3-3
................
.........................
Power On .. 3-3
......................
ExternalTracking Generator Control 3-4
2707 instruction Manual i

Table of Contents
.................... ~zernalTracking Generator Operation 3-5
fl
Initialization ........................................... 3-5
TurningtheTrackingGeneratorOnand
Off ............... 3-5
Normalizingthe ExternalTracking Generator .............. 3-5
Settingthe ExternalTrackingGeneratorAmplitude
........ 3-7
Settingthe TG Variable Level
........................... 3-8
................................. Adjusting the Tracking 3-8
................. UsingExternal Amplification/Attenuation 3-10
A PracticalExample
........................... 3-10
Specification
............................................... NominalTraits
...................................
Warranted Characteristics
.......................................
npicalCharacteristics
Performance Verification
PerformanceVerification Procedures ......................... 5-1 .
P .
Prerequisites ......................... ... ............... 5-1
.....................................
Equipment Required 5-1
......................
PerformanceVerification Procedures 5-2 . -
d
Power-OnProcedure .................................. 5-2
Check FrequencyRange ............................... 5-4
Check Tracking (FrequencyOffset)
...................... 5-5
Check OutputLevel Range and Accuracy
................ 5-6
............................... Check TG VariableLevel 5-8
Check VSWR
......................................... 5-9
Check Tracking Generator Flatness ...................... 5-10
Check System Flatness ................................ 5-12
Check CharacterizedFlatness
.......................... 5-13
Check Spurious Signals
................................ 5-14
.........................
Check System Dynamic Range 5-16
...................................... Check LO Output 5-17
Check Auxiliary Signals
.......................... 5-17
&
ii Contents

Table of Contents
C^ .
Adjustment Procedure
.......................................
Adjustment Procedure
..
Requirementsfor Performance ................... ....
Personnel ............................................
......................................
Warm-up Period
Access
...............................................
.......................................
Test Equipment
Preparation ..............................................
..................................
Adjustment Instructions
.....................
Adjust 105.5 MHz Oscillator Balance
....................................
Adjust Phase Lock
.......................................
Adjust Flatness
..............................
AdjustAttenuator Flatness
.............. PerformTracking Generator Normalizations
..................
Do PerformanceVerification Procedure
Service Information
. -7-
.....................................
MaintenanceInformation
AdditionalServicing information ..........................
........................
PreventingElectrostaticDischarge
..........................................
Precautions
Susceptibilityto ElectrostaticDischarge ...................
ObtainingReplacementParts .............................
.......................
Parts RepairandReturnProgram
.....................
ComponentReplacement Information
.........................
Surface-mountedComponents
................
ReplacingSurface-mounted Components
Diode Markings .......................................
TransistorandIntegratedCircuitConfigurations ...........
.......................................
Resistor Values
.....................................
CapacitorMarking
...............
MultipleTerminal (Harmonica) Connectors
...........
SolderingTechniques for LeadedComponents
......
Replacingthe Square Pinfor the MultipinConnectors
Inspectionand Cleaning .....................................
7-9
Inspection and Cleaning Procedures ......................
7-9
Inspection-Exterior ...................................
7-9
..........................
CleaningProcedure-Exterior - 7-1 0
.
....................................
Inspection-Interior 7-1 0
........................
CleaningProcedurelnterior
id$al&L
...
m4 . -mc, .
2707 Instruction Manual
I . Jll
. **- .

.-.
.....................................
Removaland Installation 7-13
..................................... EquipmentRequired
Procedures ..............................................
Top and BottomCovers ................................
Power Supply Module .................................
Power Supply InterconnectBoard .......................
ReplacingSemirigidCoaxialCables .....................
TrackingGeneratorModule .............................
Tracking GeneratorModule Disassembly .................
............................................. Troubleshooting
.................................... Troubleshooting Aids
............................................
Diagrams
CircuitBoardIllustrationsand Look-upTables
.............
.................... GeneralTroubleshootingTechniques
Theory of Operation
.......................................... Circuit Description 8-1
LogicConventions ....................................... 8-1
..................................... InstrumentOverview 8-1
MainPower Supply Module ............................ 8-2 .-.
Power Supply InterconnectBoard .......................
8-2
TrackingGeneratorModule ............................. 8-2 J
.................................. Detailed Circuit Description
Main Power Supply Module ...............................
8-5
Power Supply InterconnectBoard .........................
8-5
Tracking Generator Module
............................... 8-6
..................... ............ IsolationAmplifiers .. 8-7
..................................... Phase Lock Loop 8-8
TG Amplifier .......................................... 8-12
TG Interface .......................................... 8-13
Replaceable Electrical Parts
..................................
Replaceable ElectricalParts
Schematic Diagrams and
Circuit Board Illustrations
SchematicDiagrams and Circuit Board Illustrations ............
iv Contents

Table of Contents
r-.
ReplaceableMechanical Parts
ReplaceableMechanical Parts ................................
lndex
Index .......................................................
2707 lndructionManual
v

Table of Contents
vi Contents

List of Figures
Figure2-1 : Attachingthe ExternalTrackingGeneratorto the
SpectrumAnalyzer ........................................
Figure2-2: lnterconnectionsBetween External Tracking
Generator and SpectrumAnalyzer ..........................
Figure2-3: Savingthe ReferenceLevel .........................
Figure2-4: Displayof Filter Response ..........................
Figure2-5: BandpassFilter ResponseCurve with ReferenceLevel .
Figure3-1 : Front Panel
.......................................
Figure3-2: Rear Panel ........................................
Figure3-3: BandpassFilter ResponseUsing B. CMINUSAMode ..
Figure5-1 : lnterconnectionsBetween External Tracking
Generator and Controlling SpectrumAnalyzer ................
Figure5-2: Test Setup For MeasuringReturn Loss ...............
Figure5-3: Test Setup For MeasuringTracking Generator Flatness .
Figure5-4: Harmonic Spur DistributionNear the 100kHz
....................
Fundamental(10 dB Per Division Display)
Figure6-1 : Locationsof SemirigidCableConnectors on
................................ Tracking Generator Module
Figure6-2: Adjustment Locationson the PhaseLock Loop Board . .
.........................
Figure6-3: Special Probe Construction
Figure6-4: Adjustment Locations on theInterfaceBoard
..........
Figure6-5: Twisted Pair andWire-LoopCapacitor Locations
..........................
on theAttenuator (AmplifierBoard)
Figure7-1 : Surface-mountedComponentsLeadConfiguration ....
..
.......................
Figure7-2: Diode Polarity Markings
..
Figure7-3: Multipin(Harmonic)Connectors .....................
Figure7-4: ScrewsSecuringTracking GeneratorModule .........
...............
Figure7-5: TG IsolationAmplifiers BoardRemoval
................
Figure7-6: TG PhaseLock Loop BoardRemoval
........................
Figure7-7: TG Amplifier BoardRemoval
...................
Figure8-1 : Tracking GeneratorBlock Diagram
....................
Figure8-2: IsolationAmplifier Block Diagram
...........
Figure8-3: 2110 MHz PhaseLock LoopBlock Diagram
..................
Figure8-4: 105.5 MHz OscillatorAC Equivalent
.........................
Figure8-5: RF Amplifier Block Diagram
.......
Figure8-6: Tracking Generator InterconnectBlockDiagram
2707 Instruction Manual vii

List of Figures
Figure10-1 : Graphic Itemsand Special Symbols Used
........................................... inThis Manual
Figure10-2: LocatingComponentson CircuitBoardor
Schematic Diagram ....................................... 10-3
Figure10-3: A20 Power Supply InterconnectBoard ..............
10-4
Figure10-4: A24A1 TG InterfaceBoard .........................
10-6
Figure10-5: A24A2 TG PhaseLock Loop Board .................
10-8
Figure10-6: A24A3 TG IsolationAmps Board ....................
10-10
Figure10-7: A24A4 TG Amplifier Board .........................
10-12
viii List of Figures