Tektronix 1705A 1705A Spectrum Monitor 10-3

Replaceable Mechanical Parts

1705A Spectrum Monitor 10-3

CROSSINDEX - MFR.CODE NUMBER TO MANUFACTURER

Mfr.

Code. Manufacturer Address City,State, Zip Code

06383 PANDUITCORP 17301RIDGELAND TINLEYPARK IL 60477--3048

06915 RICHCO 5825N TR IPP AVEP.O. BOX 804238 CHICAGO, IL 60646

07416 NELSONNAME PLATE CO 3191CASITAS LOSANGELES CA 90039--2410

0KB01 STAUFFERSUPPLY 810 SE SHERMAN PORTLAND OR 97214

0J9P9 GEROMEMFG CO INC POBOX 737 403 NORTH M AIN NEWBERG,OR 97132

12327 FREEWAYCORP 9301ALLEN DR CLEVELANDOH 44125 --4632

13764 MICROPLAST ICS INC. HIGHWAY178NORT H FLIPPIN, AR 72634

15912 THOMASAND BETTSCORP 76FAIRBANKS I RVINE CA92718

ELECTRONICSGROUP

20093 FRC--ELECTRICALINDUSTRIES CORP. 691CENTRAL AVE MURRAYHILL,NJ 07974

31918 ITTSCH ADOW INC 8081WALLACE RD EDENPRAIRIE MN 55344--2224

34785 DEKINC 3480SWENSON AVE STCHARLES IL 60174--3450

56501 THOMAS& BETT S CORPORATION 1555LINFIELD RD MEMPHIS,TN 38119

70903 COOPERBELDEN ELECTRONICS WIRE AND C

SUBOF COOPER INDUSTRIES INC

73743 FISCHER SPECIAL MFG CO 111INDUSTRIAL RD COLDSPRING KY 41076--9749

75915 LITTELFUSE INC 800 E NORTHW EST HWY DES PLAINES IL 60016--3049

SUBTRACOR INC

78189 ILLINOIST OOL WORKS INC ST CHARLES ROAD ELGIN IL 60120

SHAKEPROOFDI V

7X318 KASOPLASTICS INC 11013A NE 39TH VANCOUVER,WA 98662

80009 TEKTRONIX INC 14150SW KAR LBR AUN DR BEAVERTONOR 97077--0001

POBOX 500

80126 PACIFICELECTRICORD CO 747 W REDONDO BEACH GARDENA C A 90247--4203

POBOX 10

83309 ELECTRICALSPECIALITY CO 287 WATTIS WAY SOUTHSAN FR ANCISCO, CA 94080

83385 MICRODOT MFG INC 3221WBIG BEAVER RD TROYMI 48098

GREER--CENTRALDIV

83486 ELCOINDUSTRIES INC 1101SAMUELSON RD ROCKFORD IL 61101

86928 SEASTROMMF G CO INC 701 SONORA AVE GLENDALE C A 91201--2431

93907 TEXTRONI NC 60018TH AVE ROCKFORD IL 61108--5181

CAMCARDIV

9M860 ESAMINC POBOX 376 GRANTS PASS,OR 97526

TK0435 LEWISSCREW CO 4300S RACINE AVE CHICAGO IL 60609--3320

TK0858 STAUFFERSUPPLYCO (DIST)

TK1179 PANELCOMPONENTS CORP 1360NDUTTON AVE SANTAROSA CA 95406

POBOX 6626

TK1373 PATELEC--CEM(ITALY) 10156 TORINO VAICENTALLO 62/45S ITALY

TK1543 CAMCAR/TEXTRON 600 18TH AVE ROC KFORD IL 61108--5181

TK1617 CRAFTFACT ORY PLASTICS 17145SW ALEXANDER ALOHA, OR 97007

Contents

Main 1705A Spectrum Monitor i Table of Contents Introduction Section1 Introduction 1--1................................................ Operating Instructions Section 2 Operating Instruction s 2--1....................................... Installation Section 3 Installation 3--1................................................. Theory of Operation Section 4 Theory of Operation 4--1......................................... 1705A Spectrum Monitor iii Checks and Adjustments Section 5 Checks And Adjustments 5--1..................................... iv 1705A Spectrum Monitor Maintenance 6- - 1.......................................... Section 6 Maintenance 6--1................................................ Section 7 Options 7--1.................................................... Replaceable ElectricalParts Diagrams/Circuit Bo ard Illustrations Replaceable Mechanical Parts List of Figures Page List of Tables General Safety Summary ToAvoidFireor PersonalInjury Symbolsand Terms Service Safety Summary Page Preface Page Preface 1705A Spectrum Monitor xv Contacting Tektronix Page Page Page Section 1 Introduction TypicalConfigurations Accessories Standard Accessories Safety Information Optional Accessories 1-4 1705A Spectrum Monitor ELECTRICAL SPECIFICATION Table1- 1: Spectrum Display 1705A Spectrum Monitor 1-5 Table1- 1: Spectrum Display (Cont.) Table1- 2: CRT Display Table1- 3: Power Source 1-6 1705A Spectrum Monitor Table1- 4: Environmental Characteristics Table1- 5: Physical Characteristics Table1- 6: Certifications and Compliances 1705A Spectrum Monitor 1-7 Table1- 6: Certifications and Compliances (cont.) Page APPLICATIONS Locating Satellites Satellite Footprints Using the 1705A for Satellite Communication L- Band Input Signals Zeroing in on a Satellite Locating the Satellite Identifying the Satellite Page TRANSPONDER FindingThe C orrect Transponder Optimize Signal Strength Looking at Exciters with the 70 MHz Input Miscellaneous Uses forthe 1705A 1-18 1705A Spectrum Monitor Page Page Section 2 Operating Instructions Front-panel Controlsand Indicators INPUT FILTER Operating Instructions Tektronix POWER SWEEP DISPLAY INPUT Page Rear- Panel Connectors POSITION INPUTS POWER 12 3 4 POWER 5 6 Powering-up Measurement Graticule VerticalScales Operating Instructions 2-8 1705A Spectrum Monitor Table2- 1: dB Reference Reading in dB VoltageRatio Power Ratio Readingin dB VoltageRatio Power Ratio Reading in dBm v(75)v(50) Reading in dBm v(75)v(50) Horizontal Scales Page 70 MHZ L-BAND Center Frequency Readout Page Page Customizing FrequencyReadout TurningOn or Off Readout Changing Readout Position SPECTRUM SPAN/DIV Changing Readout Frequency 12.00 GHZ Locating Ku -Band Satellite s TestMode Basic Operating Procedure Page Page Page Page Page Page Page Section 3 Installation ElectricalInstallation Mechanical Installation Operating Options Cabinet Options Page Cabinetizing Cabinet Securing Screws Rack Adapter Page Page Custom Installation Page Page Section 4 Theory of Operation Overview Block Diagram RF Input Circuits (Diagram 1) IF Amplifier Circuits (Diagram 2) Sweep Generator Circuits (Diagram 3) Deflection Amplifiers (Diagram 4) Microprocessor (Diagram 5) Front Panel (Diagram 6) Low VoltagePower Supply (Diagram 7) RF Input Diagram 1 High Voltage(Diagram 8) 70 MHz Input L-Band Input IF Amplifier Diagram 2 70 MHz Local Oscillator 2nd Local Oscillator Input Filter,Mixer, and IF Resolution Filter and Log Detector Sweep Generator Diagram 3 Ramp Generator Sweep Shapers GainControl (SPAN/DIV) Bright-U p Generator Deflection Amplifiers Diagram 4 Z-Axis Control Buffers VerticalDeflection Horizontal Deflection Microprocessor Diagram 5 Microprocessor Front Panel Diagram 6 Readout TraceRotate Graticule Lights Indicators,C ontrols, and Switches +18 VoltSupply Low VoltagePower Supply Diagram 7 Line Rectifier and Filter PulseW idth Modulator Output Filters Error Amplifier Feedback Transformer Driver and Peak Detector Output Under-Voltage Shutdown High VoltagePower Supply Diagram 8 HV Osc and Error Amp Power SupplyOutput s Focus Amplifier Grid Drive Circuit Z-Axis Amplifier CRT Page Page Page Section 5 Checks And Adjustments Recommended Equipment List ElectricalInstruments Auxiliary Equipment Performance Check Short-Form Procedure Page Long Form Procedure Checks and Adjustments 5-6 1705A Spectrum Monitor Table5- 1: PreliminaryCont rolSet tings Figure5 -1: Initialequipment connections Page Page Page Page Page Page Page Page Page End of the Performance Check Procedure Adjustment Procedure Short-Form Procedure Long Form Procedure Checks and Adjustments 1705A Spectrum Monitor 5-19 Figure5 -7: Adjustment locations CAUTION MAINS VOLTAG E A1 PWR SPLYBD A3 MAIN BD FRONT Page Page Page Page Page Page Page End of Adjustment Procedure Page Page Page Section 6 Maintenance PREVENTIVE MAINTENANCE Cleaning VisualInspection Static-Sensitive Components TROUBLESHOOTING Performance Checks and Readjustments SPECTRUM SPAN/DIV Diagnostic Routines Page END OF NON VOLATILE <2444> RAM TEST: 2444 TEST GOOD PRESS [INPUT]KEY TO EXIT Page TroubleshootingAids LED and Key Tests Foldout Pages Parts Lists Major Assembly Interconnection General Troubleshooting Techniques Page Power Supply TroubleshootingProcedure Introduction Low VoltsSupply Page High VoltsSupply Focus AmplifierC heck Z-Axis Amplifier Check Grid Drive Check High VoltageOscillator Check CRT VoltageCheck CORRECTIVE MAINTENANCE Obtaining ReplacementParts Components Mechanical Disassembly/Assembly Bezel Removal Graticule Light Removal and Replacement Removal of the CRT Replacing the CRT Removal of the Rear Panel Removal of Front- Panel Assembly Removing the L-Band Tuner Removing the 70 MHz Tuner Removal and Replacement of the Main Board Removal and Replacement of the Power SupplyB oard Removing the LNB Power SupplyB oard REPACKAGING Page Page Page Section 7 Options Field Upgrade Kits Cabinets CRT Options Power Cord Options ORDERING Page Page Section 8 Replaceable Electrical Parts Parts OrderingInformation Using the Replaceable ElectricalParts List Cross Index- Mfr. Code Number to Manufacturer Abbreviations List of Assemblies Column Descriptions Component No. (Column 1) 1705A Spectrum Monitor 8-3 CROSSINDEX - MFR.CODE NUMBER TO MANUFACTURER 8-4 1705A Spectrum Monitor 1705A Spectrum Monitor 8-5 8-6 1705A Spectrum Monitor 1705A Spectrum Monitor 8-7 8-8 1705A Spectrum Monitor 1705A Spectrum Monitor 8-9 8-10 1705A Spectrum Monitor 1705A Spectrum Monitor 8-11 8-12 1705A Spectrum Monitor 1705A Spectrum Monitor 8-13 8-14 1705A Spectrum Monitor 1705A Spectrum Monitor 8-15 8-16 1705A Spectrum Monitor 1705A Spectrum Monitor 8-17 8-18 1705A Spectrum Monitor 1705A Spectrum Monitor 8-19 8-20 1705A Spectrum Monitor 1705A Spectrum Monitor 8-21 8-22 1705A Spectrum Monitor 1705A Spectrum Monitor 8-23 8-24 1705A Spectrum Monitor 1705A Spectrum Monitor 8-25 8-26 1705A Spectrum Monitor 1705A Spectrum Monitor 8-27 8-28 1705A Spectrum Monitor 1705A Spectrum Monitor 8-29 Page Page Page Diagrams/Circuit Board Illustrations Symbols Component Values Assembly Numbers Grid Coordinates Page 1705A Spectrum Monitor A3 Main Board Component Locator Page A3 Schematic Diagram <1> Component Locator Chart Assembly A3 and A5. Partial Assembly A3 also shown on Diagrams, 2, 3, 4, and 5. A5 70 MHz INPUT LOCALOSCILLATOR RF INPUT <1>RF INPUT <1>RF INPUT <1>RF INPUT <1> 70 MHz A570 MHZ TUNER Schematic Diagram <2> Component Locator Chart Assembly A3. Partial Assembly A3 also shown on Diagrams 1, 3, 4, and 5. RESOLUTION FILTER& LOG DETECTOR 10 KHz FILTER 1705ASPECTRUM MONITOR IFAMPLIFIER <2> Schematic Diagram <3> Component Locator Chart Assembly A3. Partial Assembly A3 also shown on Diagrams 1, 2, 4, and 5. FORTHE ORDER OF CALIBRATION. THENUMBERS MAY NOT MATCHTHE NOTE:THE NUMBERS BY ADJUSTMENTSARE SILKSCREENON THE BOARD FOR THE70MHz LINEARITY SECTION. LBAND LINEARITY RAMP GENERATOR SWEEP GENERATOR<3> CONTROL 70 MHz LINEARITY Schematic Diagram <4> Component Locator Chart Assembly A3. Partial Assembly A3 also shown on Diagrams 1, 2, 3, and 5. FILTER DEFLECTION POST REGULATORS <6> LOWPASS Schematic Diagram <5> Component Locator Chart Assembly A3 and A3A1. Partial Assembly A3 also shown on Diagrams 1, 2, 3, and 4. MICROPROCESSOR <3> <3> ROTATION MICROPROCESSOR <5> A2 Schematic Diagram <6> Component Locator Chart The schematic diagram has an alphanumeric grid to assist in locating parts within that diagram. A2 Front Panel Board A4 18V Power Supply Board Assembly A2 and A4. 1705ASPECTRUM MONITOR FRONT PANEL& 18V SUPPLY <6> A1 Power Supply Board Component Locator A1 Power Supply Board LINE RECTIFIER AND FILTER CLAMP ERROR OUTPUT UV SHUTDOWN PULSE WIDTH MODULATOR Schematic Diagram <8> Component Locator Chart A10 CRT Socket Board (Front of Board) A10 CRT Socket Board (Back of Board) Assembly A10. V1 HV OSC & ERRORAMP A10CRT SOCKET BOARD GRID DRIVE CRT Page Page Page Section 10 Replaceable Mechanical Parts Parts OrderingInformation Using the Replaceable MechanicalParts List Cross Index- Mfr. Code Number to Manufacturer Abbreviations Chassis Parts Column Descriptions 1705A Spectrum Monitor 10-3 CROSSINDEX - MFR.CODE NUMBER TO MANUFACTURER 10-4 1705A Spectrum Monitor 1705A Spectrum Monitor 10-5 10-6 1705A Spectrum Monitor 1705A Spectrum Monitor A4 A1 A3 A2 A3A1 A5