Troubleshooting the Test Set | HP 8517B instruction

5	Troubleshooting the Test Set

The troubleshooting strategy for the HP 8517B S-Parameter test set is a systematic sequence of procedures. The information may be used after system-level troubleshooting has identified the test set as the problem instrument.

Use the troubleshooting flowchart in Figure 5-2to help isolate the faulty assembly. Notice procedure numbers within some of the flow diagram blocks. These are keyed to troubleshooting procedures. Perform the numbered procedure associated with each block as you progress through the chart.

Refer to the block diagrams, located at the end of this section, to help you understand the test set’s operation.

HP 8517B S-Parameter Test Set Manual 5-1

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HP 8517B manual Troubleshooting the Test Set

Contents

HP 8517B Parameter Test Set Restricted Rights Legend What You’ll Find in This Manual… Certification Warranty Warranty Assistance Service and Support Instrument Markings Safety and Regulatory Information Safety Earth Ground Italics Typeface Conventions HP 8517B S-Parameter Test Set Manual Contents Installation Specifications HP 8517B Test Set Replacement Procedures HP 8517B Replaceable Parts Contents-6HP 8517B S-Parameter Test Set Manual Getting Started How to Use This Manual Test Set Description Test Set Description Option 004, HP 8517B Test Set Block Diagram HP 8517B Options and Descriptions HP 8517B Test Set OptionsHP 8517B Test Set Options Options HP 8517B Test Set Option Description Test Set Operation Verification Verifying Test Set OperationVerifying Test Set Operation Maintaining Measurement Accuracy Maintaining Measurement Accuracy Instruments Supported by This Manual Instruments Supported by This Manual Source Firmware Revision Compatibility Matrix Instrument Firmware Compatibility Service and Support Options Service and Support Options AvailableService and Support Options Available Option Description Accessories Available AccessoriesHP 8517B Test Set Accessories Available Accessories Accessory Model Number Contents or Description Recommended Test Equipment Critical Recommended Model Use SpecificationsRecommended Test Equipment Recommended Test Equipment Safety Precautions Operating and Safety PrecautionsMaximum Input Power Levels Operating and Safety Precautions 14HP 8517B S-Parameter Test Set Manual 2Installation Initial Inspection Initial Inspection Anti-rotation Clamps RF Source Cable, Rack Configuration RF Source Cable, Bench-top Configuration Installing the Test Set on a Bench Installing the Test Set Into a System RackRecommended Static-Free Workstation Configuration Installing the Test Set Into a System Rack Configuring the Test Set in a System Configuring the Test Set in a System Connection Instructions and Connector Descriptions Connecting the System CablesReplacing O-Rings in Anti-Rotation Clamps Packaging the Test Set Packaging the Test Set 8HP 8517B S-Parameter Test Set Manual Front-Panel Description Front-Panel Features Rear-Panel Features Active devices under test Controlling Multiple Test SetsPort 1 Bias HP 8517B S-Parameter Test Set Manual Multiple Test-Set Connections Initialization at Power-Up Selecting a Test Set Selecting a Test Set When Multiple Units are Configured New Address With Switch #1 With Switch #2 Measurement Calibration Measuring High-Power Devices with Option Changing the Test Port Attenuators Changing Signal Path States After System Calibration Storing Trace Memories Viewing Normalized Parameters Default to Memory Instrument State Local Auxiliary Menus System Making Operational Checks Performance Verification Attach the first clamp Using Anti-Rotation Clamps Positioning the thumb-screw Using a Torque Wrench Correctly Visually Aligning Clamp and Nut Flats Positioning the connector Aligning the thumb-screw Using Anti-Rotation ClampsAttaching the second clamp HP 8517B S-Parameter Test Set Manual Supplemental Characteristics Mechanical SpecificationsHP 8510/HP 8517B Mechanical Specifications HP 8510/HP 8517B Supplemental Characteristics 3HP 8517B S-Parameter Test Set Manual HP 8517B S-Parameter Test Set Manual Troubleshooting the Test Set Theory of Operation RF Source PowerTheory of Operation Theory of Operation LO Signal Control Troubleshooting Sequence Troubleshooting Sequence Equipment Required, But Not Supplied Equipment Needed But Not SuppliedEquipment Type HP Part Number Assembly Troubleshooting ProceduresPower Supply Voltages to A15 Power Supply Voltages to A27 Power Supply Fuses and Test Points Fuse Location Instrument HP-IB Switch Setting Active LED Location If the Self-Test Fails to Run Properly LSN TLK SRQ REM Self-Test Indication Service Adapter Connections Using the Service Adapter HP 85102 is working properly. The problem is Service Adapter ConclusionsResults Observations Most likely in the source or the test set. Refer to Unratioed Power Test Isolating Signal Path ProblemsTesting Signal Paths Drive Port Test switch to restore factory default conditions Testing Paths 5 10 RF Path 1 and Path 2, HP 8517B Standard Test Set 11 RF Path 3 and Path 4, HP 8517B Standard Test Set 12 RF Path 5 and Path 6, HP 8517B Standard Test Set 13 RF Path 1 through Path 4, HP 8517B Option 007 Test Set 14 RF Signal for Path 1 through Path 4, HP 8517B Option 15 RF Path 5 and Path 6, HP 8517B Option Test Results for Path 1 through Path Sample DiagnosticsMost Probable Failures B indicates Bad indicates Good 24HP 8517B S-Parameter Test Set Manual HP 8517B Test Set Replacement Procedures ESD-Safe Workstation Configuration Performance Tests Adjustments Tools Used for Procedure HP Part Number Replacement-Procedure Tools NeededEquipment Needed But Not Supplied HP 8517B Major Assembly Location Diagram Initial Precautions Switch/Splitter Replacement Assembly Replacement ProceduresA18 Switch/Splitter Assembly A14, A10 to A13 Frequency Converter Assembly A15 Regulator Board Assembly Regulator Board Replacement Filter Capacitor ReplacementC1 to C4 Filter Capacitors Diagram of 2.4 mm Test Port Connector Mm Test Port Connectors Power Transformer Fan Assembly ReplacementReplacement B1 Fan Assembly This procedure. Disconnect the ac power cord before starting Ring Replacement Anti-Rotation Clamp O-Ring Replacement Front Panel Interface Board ReplacementA1 Front Panel and Interface Board Assembly Test Port Attenuator Bias Tees Replacement A7 and A9 Bias TeesA6 and A8 Test Port Couplers A16 or A17 Port Attenuators Input Amplifier A22 Input Amplifier AssemblyBuffer Amplifier A23 to A26 Buffer Amplifiers A27 Post Regulator Board Assembly Post Regulator Board Replacement 14HP 8517B S-Parameter Test Set Manual Rebuilt-Exchange Assemblies Introduction Meter Electron Tube Recovery Diode, Varactor Assembly Fuse SwitchOrdering Information To Order Parts . . . . Fast Manufacturer Names and Addresses Standard Abbreviations Decoder Depletion ModeDegree Shaped hole Hardware Male, Maximum, Mega, Mi, Milli, ModeHexadecimal, Hexagon, Hexagonal Helical Pad, Power Dissipation Opt Optical, Option, Optional Picoampere, Power AmplifierMiniature Miter Subminiature, A-Type Threaded Connector Pico Farad, Power FactorPackage Plastic Subminiature, C-Type Threaded Connector Subminiature, B-Type Slip-on ConnectorTeeth, temperature, Thickness, Time, Timed, Tooth, Typical Ambient Temperature, Tantalum Abbreviation Prefix Multiple Multipliers, Abbreviation and Description Power Cable and Plug Part Numbers Fuse Name Location Instrument FusesPart number Hewlett-Packard pays postage on boxes mailed in the U.S.A Low Cost Rebuilt-Exchange Procedure Description Major Assembly Reference Designator and Parts Information Major Assembly Locations in the Standard HP 8517B Test Set Cable Assembly A8J3 to A11J2 Cable Assembly AT1 to A10J2Cable Assembly A6J3 to A12J2 Cable Assembly A8J2 to A9J2 Flexible Cable Assemblies in the Standard HP 8517B Test Set 18HP 8517B S-Parameter Test Set Manual Miscellaneous Parts, Front Panel HP 8517B Test Set 10 Test Port Connector Assembly Components 11 Miscellaneous Parts, Rear Panel HP 8517B Test Set Line Module Retainer Clips Teflon Cable SleeveWasher-LK Intl T 3/8 in 0.377-IN-ID Washer-LK Intl T 7/16 in 0.439-IN-ID Detailed Views of Hardware Stack-Ups 12 Miscellaneous Parts, Top Internal View 2200-0107 Machine Screws 13 Miscellaneous Parts, MotherboardC1 C4 0180-2671 Connector Post Type 0.100-PIN-SPCG 14-CONT Connector 5-PIN M Post TypeConnector 5-PIN M Post Type J8 and J9 Connector-PC Edge 2-Rows XA5 XA6 to XA14 Not Assigned XA15 14 Parts Unique to HP 8517B Option 001 Test Set Cable Assembly, A2J6 to J10A2 Cable Assembly, A2J9 to J10A4Cable Assembly, A2J12 to J10A3 Cable Assembly, A3J3 to J10A7 Cable Assembly, A13J3 to Port 2J14 Cable Assembly, A12J3 to Port 1 J1315 Parts Unique to HP 8417B Option 002 Test Set Cable Assembly, A8J3 to A17J2 Cable Assembly, AT7 to A9J1Cable Assembly, A17J1 to A11J2 16 Parts Unique to HP 8517B Option 004 Test Set 17 Parts Unique to HP 8517B Option 007 Test Set Post Regulator Board Assembly Beneath A22 Input Amplifier08516-60021 DB Attenuators Input Amplifier Front Panel J7 to A22 Input Amplifier HP Part NumberA22 Input Amplifier to A18J5 A6 Coupler to A23 18 Parts Unique to Option 002 plus Option 19 Parts Unique to Option 004 plus Option 20 Instrument Chassis Replaceable Parts 36HP 8517B S-Parameter Test Set Manual HP 8517B S-Parameter Test Set Manual Index-1 Index Index-2HP 8517B S-Parameter Test Set Manual