Input Amplifier, Buffer Amplifier | HP 8517B instruction

HP 8517B Test Set Replacement Procedures

Assembly Replacement Procedures

Input Amplifier	A22 Input Amplifier Assembly
Replacement

NOTE	This procedure is for Option 007, Option 002 “plus” 007, and Option 004
	“plus” 007, only.
	1.	See the figure in Chapter 7, Table 7-17for the location of the A22
	1.
		amplifier.
	2.	Without disconnecting AT1 and AT2 fixed attenuators, remove the other
		five semi-rigid cables attached to the A18 switch/splitter.
	3.	Remove the W45 semi-rigid cable between the A22 input amplifier and
		J7 rear-panel RF input connector.
	4.	Remove the two screws holding the switch/splitter to the amplifier
		mount bracket.
	5.	Remove the switch/splitter from the amplifier mount bracket.
	6.	Remove the four screws that secure the A22 input amplifier to the
		amplifier-mount bracket.
Buffer Amplifier	A23 to A26 Buffer Amplifiers
Replacement

NOTE	This procedure is for Option 007, Option 002 “plus” 007, and Option 004
	“plus” 007, only.
	1.	See the figure in Chapter 7, Table 7-17for the location of the buffer
	1.
		amplifiers.
	2.	Remove the two semi-rigid cables from the buffer amplifier to be
		replaced.
	3.	Remove the four screws securing the buffer amplifier to the amplifier
		mount bracket.
	4.	Remove the buffer amplifier.

6-12HP 8517B S-Parameter Test Set Manual

Image 96

HP 8517B manual A22 Input Amplifier Assembly, A23 to A26 Buffer Amplifiers

Contents

HP 8517B Parameter Test Set Restricted Rights Legend What You’ll Find in This Manual… Warranty Certification Warranty Assistance Service and Support Safety and Regulatory Information Instrument Markings Safety Earth Ground Typeface Conventions Italics 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 How to Use This Manual Getting Started Test Set Description Test Set Description Option 004, HP 8517B Test Set Block Diagram HP 8517B Test Set Options HP 8517B Options and DescriptionsHP 8517B Test Set Options Options HP 8517B Test Set Option Description Verifying Test Set Operation Test Set Operation VerificationVerifying Test Set Operation Maintaining Measurement Accuracy Maintaining Measurement Accuracy Instruments Supported by This Manual Instruments Supported by This Manual Instrument Firmware Compatibility Source Firmware Revision Compatibility Matrix Service and Support Options Available Service and Support OptionsService and Support Options Available Option Description Accessories Accessories AvailableHP 8517B Test Set Accessories Available Accessories Accessory Model Number Contents or Description Critical Recommended Model Use Specifications Recommended Test EquipmentRecommended Test Equipment Recommended Test Equipment Operating and Safety Precautions Safety PrecautionsMaximum Input Power Levels Operating and Safety Precautions 14HP 8517B S-Parameter Test Set Manual 2Installation Initial Inspection Initial Inspection RF Source Cable, Bench-top Configuration Anti-rotation Clamps RF Source Cable, Rack Configuration Installing the Test Set Into a System Rack Installing the Test Set on a BenchRecommended 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 Connecting the System Cables Connection Instructions and Connector DescriptionsReplacing O-Rings in Anti-Rotation Clamps Packaging the Test Set Packaging the Test Set 8HP 8517B S-Parameter Test Set Manual Front-Panel Features Front-Panel Description Rear-Panel Features Controlling Multiple Test Sets Active devices under testPort 1 Bias HP 8517B S-Parameter Test Set Manual Initialization at Power-Up Selecting a Test Set Multiple Test-Set Connections Selecting a Test Set When Multiple Units are Configured With Switch #1 With Switch #2 New Address Measurement Calibration Measuring High-Power Devices with Option Changing Signal Path States After System Calibration Changing the Test Port Attenuators Storing Trace Memories Viewing Normalized Parameters Default to Memory Making Operational Checks Instrument State Local Auxiliary Menus System Performance Verification Using Anti-Rotation Clamps Attach the first clamp Using a Torque Wrench Correctly Positioning the thumb-screw Positioning the connector Visually Aligning Clamp and Nut Flats Using Anti-Rotation Clamps Aligning the thumb-screwAttaching the second clamp HP 8517B S-Parameter Test Set Manual Mechanical Specifications Supplemental CharacteristicsHP 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 RF Source Power Theory of OperationTheory of Operation Theory of Operation LO Signal Control Troubleshooting Sequence Troubleshooting Sequence Equipment Needed But Not Supplied Equipment Required, But Not SuppliedEquipment Type HP Part Number Troubleshooting Procedures AssemblyPower Supply Voltages to A15 Power Supply Voltages to A27 Power Supply Fuses and Test Points Instrument HP-IB Switch Setting Fuse Location If the Self-Test Fails to Run Properly Active LED Location Self-Test Indication LSN TLK SRQ REM Using the Service Adapter Service Adapter Connections Service Adapter Conclusions HP 85102 is working properly. The problem isResults Observations Most likely in the source or the test set. Refer to Isolating Signal Path Problems Unratioed Power TestTesting Signal Paths Drive Port Testing Paths 5 Test switch to restore factory default conditions 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 Sample Diagnostics Test Results for Path 1 through PathMost Probable Failures B indicates Bad indicates Good 24HP 8517B S-Parameter Test Set Manual HP 8517B Test Set Replacement Procedures Performance Tests Adjustments ESD-Safe Workstation Configuration Replacement-Procedure Tools Needed Tools Used for Procedure HP Part NumberEquipment Needed But Not Supplied HP 8517B Major Assembly Location Diagram Assembly Replacement Procedures Initial Precautions Switch/Splitter ReplacementA18 Switch/Splitter Assembly A14, A10 to A13 Frequency Converter Assembly Regulator Board Replacement Filter Capacitor Replacement A15 Regulator Board AssemblyC1 to C4 Filter Capacitors Mm Test Port Connectors Diagram of 2.4 mm Test Port Connector Fan Assembly Replacement Power TransformerReplacement B1 Fan Assembly This procedure. Disconnect the ac power cord before starting Front Panel Interface Board Replacement Ring Replacement Anti-Rotation Clamp O-Ring ReplacementA1 Front Panel and Interface Board Assembly Bias Tees Replacement A7 and A9 Bias Tees Test Port AttenuatorA6 and A8 Test Port Couplers A16 or A17 Port Attenuators A22 Input Amplifier Assembly Input AmplifierBuffer Amplifier A23 to A26 Buffer Amplifiers Post Regulator Board Replacement A27 Post Regulator Board Assembly 14HP 8517B S-Parameter Test Set Manual Introduction Rebuilt-Exchange Assemblies Assembly Fuse Switch Meter Electron Tube Recovery Diode, VaractorOrdering Information To Order Parts . . . . Fast Manufacturer Names and Addresses Standard Abbreviations Depletion Mode DecoderDegree Shaped hole Male, Maximum, Mega, Mi, Milli, Mode HardwareHexadecimal, Hexagon, Hexagonal Helical Opt Optical, Option, Optional Picoampere, Power Amplifier Pad, Power DissipationMiniature Miter Pico Farad, Power Factor Subminiature, A-Type Threaded ConnectorPackage Plastic Subminiature, B-Type Slip-on Connector Subminiature, C-Type Threaded ConnectorTeeth, temperature, Thickness, Time, Timed, Tooth, Typical Ambient Temperature, Tantalum Multipliers, Abbreviation and Description Abbreviation Prefix Multiple Power Cable and Plug Part Numbers Instrument Fuses Fuse Name LocationPart number Low Cost Rebuilt-Exchange Procedure Hewlett-Packard pays postage on boxes mailed in the U.S.A Major Assembly Reference Designator and Parts Information Description Major Assembly Locations in the Standard HP 8517B Test Set Cable Assembly AT1 to A10J2 Cable Assembly A8J3 to A11J2Cable 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 Teflon Cable Sleeve Line Module Retainer ClipsWasher-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 13 Miscellaneous Parts, Motherboard 2200-0107 Machine ScrewsC1 C4 0180-2671 Connector 5-PIN M Post Type Connector Post Type 0.100-PIN-SPCG 14-CONTConnector 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, A2J9 to J10A4 Cable Assembly, A2J6 to J10A2Cable Assembly, A2J12 to J10A3 Cable Assembly, A3J3 to J10A7 Cable Assembly, A12J3 to Port 1 J13 Cable Assembly, A13J3 to Port 2J1415 Parts Unique to HP 8417B Option 002 Test Set Cable Assembly, AT7 to A9J1 Cable Assembly, A8J3 to A17J2Cable Assembly, A17J1 to A11J2 16 Parts Unique to HP 8517B Option 004 Test Set Post Regulator Board Assembly Beneath A22 Input Amplifier 17 Parts Unique to HP 8517B Option 007 Test Set08516-60021 DB Attenuators Input Amplifier HP Part Number Front Panel J7 to A22 Input AmplifierA22 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 Index HP 8517B S-Parameter Test Set Manual Index-1 Index-2HP 8517B S-Parameter Test Set Manual