1705A Spectrum Monitor | Tektronix instruction

Installation

Custom Installation For applications such as consoles, shown in Figure 3-8, the instrument can be mounted with front molding flush or protruding from the console. In both cases, allow approximately 3 inches of rear clearance for bnc and power cord connec- tions.

For Flush Front Panel: Cut hole the same size as the monitor front molding to allow the monitor front panel to align with the custom panel surface.

Requires four 0.156” holes below the 1700F00 cabinet to secure the instrument to the shelf.

For Protruding Front Molding:

Cut hole in panel the same size as the opening in the monitor cabinet to al- low the front-panel molding to cover the hole.

Figure 3-8: Considerations for custom installation of an instrument

To mount the 1705A safely, attach it to a shelf strong enough to hold its weight, using the four 0.156-inch diameter holes in the bottom of the 1700F00 cabinet. See Figure 3-8.

3- 8	1705A Spectrum Monitor

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Tektronix instruction manual 1705A Spectrum Monitor

Contents

1705A Spectrum Monitor SN B040000 and Above 070-8222-08 Table of Contents Theory of Operation InstallationTable of Contents 1705A Spectrum Monitor Iii Checks and Adjustments Options Maintenance Replaceable Mechanical Parts 10-1 Replaceable Electrical PartsReplaceable Electrical Parts Simulation of a 1705A Full SPAN/DIV display List of Figures 1705A Spectrum Monitor Vii Considerations for custom installation of an instrument Viii List of Tables General Safety Summary General Safety Summary Service Safety Summary Service Safety Summary Xii Introduction InstallationPreface Replaceable Mechanical Parts USA Contacting TektronixPreface Preface Xvi Introduction Page Section Introduction Typical Configurations #73 AccessoriesOptions Introduction Optional Accessories Safety Information Full Spectrum DisplaySPAN/DIV CRT Display Power SourceIntroduction Spectrum Display EMC Introduction Environmental CharacteristicsPhysical Characteristics Certifications and Compliances CAT Introduction Certifications and Compliances Meters Applications Earth SUN Satellite Using the 1705A for Satellite Communication SAN Diego Band Input SignalsVancouver BC Seattle Portland Helena Boise SAN Francisco LOS Angeles Zeroing in on a Satellite Tek 12.20 GHZ Frequency and Number Down Link Transponder Horizontal Vertical Polarization GHZ Looking at Exciters with the 70 MHz Input Miscellaneous Uses for the 1705A Input LNB OUTBand Splitter Operating Instructions Page Section Operating Instructions Front-panel Controls and Indicators Display Position PowerOperating Instructions Filter Input SPAN/DIV Variable control that adjusts the display brightness Position Rear- Panel Connectors Spectrum Monitor Holder for the instrument’s mains fuse 1400 MHZ Powering- up 1705A graticule scale Measurement Graticule Reading in dB Reading in dB Voltage Ratio Power RatioVoltage Ratio Power Ratio Operating Instructions DB Reference Operating Instructions DBm to v Conversion Reading in dBm 75Ω 50Ω Frequency Scale = 10 Divisions Sweep Length = 12 Divisions Minimum Maximum FrequencyMID MHZ Center Frequency Readout70 MHZ 1400 MHZ Center Frequency Tuned AT this Point Point on Trace That Corresponds to Customizing Frequency Readout Readout Position Readout ModeOffset Adjust Main Menu 12.00 GHZ Locating Ku- Band Satellites Basic Operating Procedure Satcom K2 G-STAR City 1705A Spectrum Monitor Operating Instructions Page Page Installation Page Electrical Installation Section Installation Cabinet Options Mechanical InstallationInstallation LNB Power Band Input OFF 130 250875 105 Cabinetizing 1700F02 portable cabinet dimensions Cabinet Securing Screws A WFM7F05 with a blank front panel 1700F06 1700F07 1705A Spectrum Monitor Theory of Operation Page Overview Block DiagramSection Theory of Operation Theory of Operation Front Panel Diagram RF Input Diagram If Amplifier Diagram Resolution Filter and Log Detector Sweep Generator Diagram Start Display Deflection Amplifiers Diagram Vertical Deflection Amplifier Microprocessor Diagram Front Panel Diagram High Load LOW Load Average Low Voltage Power Supply Diagram Pulse Width Modulator Theory of Operation High Voltage Power Supply Diagram Axis Amplifier Pinout of the CRT Socket 1705A Spectrum Monitor CRT The pinout for the CRT is shown in Figure Theory of Operation Checks and Adjustments Page Electrical Instruments Section Checks And AdjustmentsRecommended Equipment List Auxiliary Equipment Performance Check Short-Form ProcedureChecks and Adjustments SMA Male-to-bnc Female Adapter 1705A Spectrum Monitor Long Form Procedure Checks and Adjustments Preliminary Control Settings Page Marker Here Marker is +/-- 1 Minor Division from Here Checks and Adjustments 1705A Spectrum Monitor Page Variable Autotransformer L-BAND Input Marker Here Graticule Line Disregard UHF Sine Wave Generator Page End of the Performance Check Procedure Short- Form Procedure Adjustment Procedure Video SPAN/DIV Full Center Frequency Preliminary Setup A1 PWR Sply BD A3 Main BDFront Tek Strap Remove the shorting strap 1705A Spectrum MonitorShorting 1705A Spectrum Monitor Page 1705A Spectrum Monitor Page 1705A Spectrum Monitor End of Adjustment Procedure Checks and Adjustments Maintenance Page Cleaning Section Maintenance ECL Schottky SignalLOW Power Schott Cmos Troubleshooting Diagnostic Routines Nonvolatile 2444 RAM Test Reading Data Stored AT 60H to 7F in Processor Error Cannot Read or Write Press Input KEY to Exit Troubleshooting Aids Circuit board assembly locations Major Assembly Interconnection PIN ROW B ROW a Power Supply Fault Symptoms Power Supply Troubleshooting Procedure Low Volts Supply Maintenance Power Supply Fault Symptoms Maintenance Rectifier/Switcher Check High Volts Supply Grid Drive Check Maintenance High Volts Supply Fault SymptomsFocus Amplifier Check Axis Amplifier Check CRT Voltage Check High Voltage Oscillator Check Obtaining Replacement Parts Corrective Maintenance Bezel Removal Mechanical Disassembly/AssemblyMaintenance Test Selectable Components Graticule Light Removal and Replacement Replacing the CRT Removal of the CRT Removal of the Rear Panel Removal of Front- Panel Assembly Removing the L- Band Tuner Removal Replacement of the Main Board Removal Replacement of the Power Supply Board Front Removing the LNB Power Supply Board Repackaging 1705A Spectrum Monitor Options Page Section Options Field Upgrade KitsPower Cord Options Power Cord Options Description of power cord Ordering Replaceable Electrical Parts Page Parts Ordering Information Using the Replaceable Electrical Parts ListSection Replaceable Electrical Parts Column 3 Column DescriptionsTektronix Part No Column MSD INC Orange ST DARLINGTON, SC Spectrum Control INC Weight STCross Index MFR. Code Number to Manufacturer AMP INC Fulling Mill Harrisburg PA Wilhelm Westerman Zman & AssociatesSobudai Zawa Kanagawa 228 Japan Chrome Shibaura Tokyo Japan 2ND Floor NEW Kyoei MINATO-KU Circuit BD Assymain Board ASSY,1705A Circuit BD Assypower SUPPLY, 1705ACircuit BD ASSY18V Power Supply Circuit BD Assyfront Panel CAP,FXD,CER DI470PF,20%,100V TUBULAR,MI IAL,MICAP,FXD,PLSTC100PF,5%,1600VDC/500VAC IN,BULK A1DS3 LAMP,GLOW135V MAX,1.9MA,C2A-T,WIRE LeadA1DS1 A1DS2 RES,FXD,CMPSN2.2M OHM,5%,0.5W SQ,TOP AdjustbulkSQ,SIDE ADJUSTT&R RES,FXD,CMPSN1.5M OHM,5%,1W RES,FXDMETAL FILM,100K OHM,1%,0.2W,TC=100 RES,FXD,FILM5K OHM,0.1%,0.2W,TC=T9IAL,T&R,SMALL Body REELED,SMALL Body RES,FXD,CMPSN2.4K OHM,5%,2W SQ,TOP ADJUST,T&RWIRED,1705A RES,THERMAL5 OHM,10%,7A/DEG C RES,VAR,PNLCP,20K OHM,20%,0.5W,LINEAR,W LED ASSYDIR1Part of A2DS313 CA ASSY,SP,ELEC34,26 AWG,5.0 L SHIELD,ELEC1705A,BRS BUS,CNDCTPLATE,ELEC Shldcircuit Board SHIELD,ELECCIRCUIT Board CAP,VAR,PLSTC1-3.5PF,500V CAP,FXD,ELCTLT33UF,+50-20%,35WVDCUVX1H330MAA CAP,VAR,CER DI9-45PF,200V DIO,SIGFAST RCVRY70V,200MA,100NS,COM CAP,FXD,MICA DI98PF,5%,500VA3CR1 A3CR2 A3FL3 A3FL1FLTR,BANDPASS A3FL2 COIL,RFFIXED,505NH COIL,RFFIXED,45NHCOIL,RFFIXED,15NH COIL,RFFIXED,64UH RES NTWK,FXD,FI10K OHM,20%,9RES ADJUSTT&RGF06UT 2K GF06UT 5K RES,FXD,FILM3.4K OHM,1%,0.2W,TC=T0 RES,FXD,FILM115K OHM,1%,0.2W,TC=T0RES,FXD,FILM237K OHM,1%,0.2W,TC=T0 RES,VAR,NONWWTRMR,250 OHM,20%,0.5W LIN RES,FXD,FILM7.5K OHM,1%,0.2W,TC=T0 CRB20FXE9K35 RES,FXD,FILM1M OHM.1%,0.2W,TC=T0Percent CRB20FXE1K62 CRB20FXE210E RES,FXD,FILM2.1K OHM,1%,0.2W,TC=T0RES,VAR,NONWWTRMR,100 OHM,20%,0.5W LIN RES,FXD,WW6.3K OHM,1%,3W GF06UT 1K MICROCKT,DGTLMICROCOMPUTER,8 BIT RES,FXD,FILM187K OHM,1%,0.2W,TC=T0Loss 10DB,PKG 7.2MM SQ,6.8MM HI IC,CONVCMOS,A/D8-BIT,32US,SAR,DIFF IN,SER MIXER,FREQ1-500MHZ IC,MISCCMOS,ANALOG Swquad SPST,100IC,LINBIPOLAR,AMPLRF AMP,20DB IC,DGTLTTL,BFR/DRVRHEX INV, OC, HI IAL,MI,T&R CONN,BOXSHUNT/SHORTINGFEM,STR,1 X 2,0.1CTR,0.385 H,30 GLD,BLK,JUMPER TAIL,30 GLD RES,FXD,CMPSN1K OHM,5%,0.50W RES,FXD,FILM267K OHM,1%,0.2W,TC=T0RES,FXD,WW1 OHM,5%,2W Order by Desc COIL,RFFIXED,150NH CONN,HDRPCB/WIREWRAP,MALE,STR,1 X 7,0.15CONN,HDRPCB/WIREWRAP,MALE,STR,1 X 4,0.150 CORE,EMTOROID,FERRITE CA ASSY,SP A10SKT1Controlled 0LUA3 CONN,RF Plug Replaceable Electrical Parts Diagrams/Circuit Board Illustrations Page Component Values Diagrams/Circuit Board IllustrationsSymbols Assembly NumbersPage 1705A Spectrum Monitor A3 Main Board Component Locator With cross-references to schematic diagrams 1, 2, 3, 4, A5 70 MHz Tuner Board A3 Main Board Schematic Diagram 1 Component Locator Chart 1705A Spectrum Monitor RF Input Local Oscillator Schematic Diagram 2 Component Locator Chart 1705A Spectrum Monitor If Amplifier Resolution Filter & LOG Detector Schematic Diagram 3 Component Locator Chart Generator Band LinearityRamp Generator Marker Schematic Diagram 4 Component Locator Chart Buffers DeflectionAmplifier Filter Schematic Diagram 5 Component Locator Chart Trace 1705A Spectrum MonitorMicroprocessor Microprocessor Schematic Diagram 6 Component Locator Chart A2 Front Panel Board 1705A Spectrum Monitor Front Panel & 18V Supply See Parts List for Effective Serial Number Ranges A1 Power Supply BoardA1 Power Supply Board Component Locator Output Filters SwitcherError Line Rectifier A10 CRT Socket Board Front of Board Schematic Diagram 8 Component Locator Chart Grid Drive Error AMP1705A Spectrum Monitor High Volts Power Supply HV OSCPage Replaceable Mechanical Parts Page Section Replaceable Mechanical Parts Using the Replaceable Mechanical Parts List Indicates actual manufacturer’s part number Qty ColumnReplaceable Mechanical Parts This indicates the quantity of mechanical parts used Nelson Name Plate CO Casitas Panduit Corp RidgelandRichco CHICAGO, IL SCREW,MACHINE6-32 X 0.875,PNH,SST Circuit BD Assypower Supply See A1 Repl Mounting PartsCOVER,HOUSINGALUMINUM FRAME,CRTBEZEL IN/OUT See A6 Repl Mounting Parts HOUSING,CKT BdaluminumFRAME,CHASSISSAFETY Controlled SCREW,MACHINE6-32 X 0.188,PNH,STL CA ASSY,CRTDISCRETE,ANODE LEAD,CRT,1,22 Standard AccessoriesCLAMP,LOOP0.375 ID,PLASTIC,SAFETY CON Trolled Standard only Optional Accessories A10