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Operating and Service ManualAgilent 8480 Series Coaxial Power SensorsThis manual applies to the following models:8481A8482A8483A8485A8487A8481B8482B84

4 Contents

Chapter 1 11IntroductionThis Operating and Service Manual contains information about initial inspection, performance tests, adjustments, operation, tr

IntroductionChapter 12General Information Instruments Covered by ManualA serial number label is attached to the power sensor. The serial number has tw

IntroductionChapter 1 3DescriptionThe 8480 series power sensors are used for measuring the average power supplied by an RF or microwave source or devi

IntroductionChapter 14Figure 1-2 8480 Series Power Sensor Simplified Block DiagramFigure 1-2 shows a basic power sensor block diagram for both thermoc

IntroductionChapter 1 5DimensionsThe physical dimensions of the power sensors differ in the model types. This is due to the additional attenuation use

IntroductionChapter 16CAUTION Removal of the D-ring that is on the sensor assembly WILL VOID THE WARRANTY. The input connector on the sensor has a D-r

IntroductionChapter 1 78483A 75 ohm sensorThe 8483A sensor is supplied with an adapter, shown in Figure 1-3. This accessory is a mechanical adapter on

IntroductionChapter 18NOTE The 11708A 30 dB attenuator is intended for use only at the 1 mW, 50 MHz power reference of the power meter. Its function a

IntroductionChapter 1 9Figure 1-4 8485A, 8485A-033, 8485D, 8485D-033 Sensor Accessories50 GHz Frequency operation (8487A and 8487D)8480 series sensors

ADocument Part Number 5971-2668Printed in the UK December 2010ErrataThis manual may contain references to HP or Hewlett-Packard. Please note that Hew

IntroductionChapter 110Figure 1-5 8487A Power Sensor with AdapterRecommended Calibration IntervalAgilent Technologies recommends a one-year calibratio

IntroductionChapter 1 118480 Series Power Sensor SpecificationsNOTE These specifications are valid with EPM and EPM-P Series of power meters.The 8480

IntroductionChapter 112* These uncertainties only apply to Option 033Table 1-4 Typical measurement uncertainties of Calibration Factor (CF) data print

IntroductionChapter 1 13Table 1-5 25 Watt sensors, 1 mW to 25 W (0 dBm to +44 dBm)Model Frequency RangeMaximum SWR Power LinearityaMaximum Power Conne

IntroductionChapter 114Table 1-7 100 mW sensors, 1 µW to 100 mW (–30 dBm to +20 dBm)Model Frequency RangeMaximum SWR Power LinearityaMaximum Power Con

IntroductionChapter 1 158483A(75ohm)100 kHz to 2 GHz100 kHz to 600 kHz: 1.80600 kHz to 2 GHz: 1.18+10 dBm to +20 dBm: ±3%300 mW avg, 10W pk Type-N(m)(

IntroductionChapter 116Table 1-8 High sensitivity sensors, 100 pW to 10 µW (–70 dBm to –20 dBm)Model Frequency RangeMaximum SWRPower LinearityaMaximum

IntroductionChapter 1 178487Db50 MHz to 50 GHz50 MHz to 100 MHz: 1.19100 MHz to 2 GHz: 1.152 GHz to 12.4 GHz: 1.2012.4 GHz to 18 GHz: 1.2918 GHz to 34

IntroductionChapter 118Supplemental CharacteristicsSupplemental characteristics are intended to provide additional information, useful in applying the

IntroductionChapter 1 19Installation Initial Inspection Inspect the shipping container. If the container or packing material is damaged, it should be

マニュアル・チェンジ 変更 本文中の「HP（YHP）」、または「(横河)ヒューレット・パッカード株式会社」という語句を、「Agilent」、または「アジレント・テクノロジー株式会社」と変更してください。 ヒューレット・パッカード社の電子計測、半導体製品、化学分析ビジネス部門は分離独立

IntroductionChapter 120Operation Environment The operating environment for the Power Sensor should be as follows: Operating Precautions Before the Pow

IntroductionChapter 1 21Figure 1-7 Typical Influence of Temperature on SensitivityOperating InstructionsTo operate the Power Sensor, refer to the oper

IntroductionChapter 122

Chapter 2 232 General InformationThis chapter contains information about recommended equipment, performance tests, and replacement parts of the Agilen

General InformationChapter 224Recommended Test Equipment Table 2-1 lists the test equipment recommended to check, adjust, and troubleshoot the Power S

General InformationChapter 2 25Connector CareKeeping in mind its flammable nature, a solution of pure isopropyl or ethyl alcohol can be used to clean

General InformationChapter 226Performance TestStanding Wave Ratio (SWR) and Reflection Coefficient (Rho) Performance TestThis section does not provide

General InformationChapter 2 27100 kHz to 600 kHz < 1.80 (0.286) 600 kHz to 2 GHz < 1.18 (0.083)8485A50 to 100 MHz < 1.15 (0.070)0.1 to 2 GH

General InformationChapter 22810 MHz to 2 GHz < 1.10 (0.048)2 to 12.4 GHz < 1.18 (0.083)12.4 to 18 GHz < 1.28 (0.123)8482B100 kHz to 2 GHz &

General InformationChapter 2 2950 to 100 MHz < 1.19 (0.085)0.1 to 4 GHz < 1.15 (0.070)4 to 12 GHz < 1.19 (0.085)12 to 18 GHz < 1.25 (0.1

ii NoticeThe information contained in this document is subject to change without notice. Agilent Technologies makes no warranty of any kind with reg

General InformationChapter 230Replaceable Parts Table 2-3 to Table 2-8 are a list of replaceable parts. Figure 2-1 illustrates the major parts. To ord

General InformationChapter 2 31Table 2-3 Bulkhead AssemblyModel Reference DesignatorPart Number Qty Description8481A A1 08481-60004 1 Bulkhead Assemb

General InformationChapter 232Table 2-4 Power Sensor Board AssembliesModel Reference DesignatorPart Number Qty Description848xA A2 5061-0982 1 Power

General InformationChapter 2 33Table 2-6 Adapters and AttenuatorsModel Part Number Qty Description8483A 1250-0597 1 50 Ohm to 75 Ohm Coax Adapter8485A

General InformationChapter 234Table 2-8 Miscellaneous LabelsPart Number Qty Description08481-80115 1 Cal Label (Blank) - For Zebra brand printers08486

Chapter 3 353 ServiceThis Service chapter contains information about principles of operation, troubleshooting, and repair of the Agilent Coaxial Power

ServiceChapter 336Principles of OperationThermocouple SensorsThe A1 Bulkhead Assembly presents a 50 Ohm load (75 Ohm for model 8483A) to the RF source

ServiceChapter 3 37Diode SensorsThe A1 Bulkhead Assembly presents a 50 Ohm load to the RF source.A diode assembly in the bulkhead rectifies the applie

ServiceChapter 338Figure 3-1 Schematic Diagram

ServiceChapter 3 39TroubleshootingTroubleshooting information is intended to first isolate the Power Sensor or the Power Meter as the defective compon

iiiWarrantyA copy of the specific warranty terms applicable to your Agilent Technologies product can be obtained from your local Sales and Service O

ServiceChapter 340signal. Check the following levels of the square wave with an oscilloscope.• At the black/white wire: -0.05 ± 0.05 Vdc (top of squar

ServiceChapter 3 41If the resistance value is incorrect (failure is usually indicated by an open circuit), then the A1 Bulkhead Assembly is defective.

ServiceChapter 342In most cases, the operational amplifier (made up of A2Q1 and the first amplifier of the power meter,) is operating correctly if the

ServiceChapter 3 43RepairPower Sensor repair consists of replacing either the A1 Bulkhead Assembly, or the A2 Power Sensor Board Assembly.A1 Bulkhead

ServiceChapter 344A2 Power Sensor Board AssemblyRepair StrategyThe recommended repair strategy for the A2 Power Sensor Board Assembly is to completely

ServiceChapter 3 45FET Balance Adjustment The FET balance adjustment should be performed if the wires connecting J1 (the sensor cable connector) to A2

ServiceChapter 346FET Balance ProcedureStep 1. Set the Power Meter as follows:Step 2. Connect the HIGH GAIN OUTPUT on the modified Power Meter to CHAN

ServiceChapter 3 47Step 4. Connect the Power Sensor to channel A of the Power Meter.NOTE Heat can affect the adjustments so handle the sensor as littl

ServiceChapter 348Figure 3-3 Example of an Unacceptable WaveformTIP You will find that positioning the wire for switching transients affects the offse

ServiceChapter 3 49Disassembly / Reassembly ProceduresDisassembly Procedure Disassemble the Power Sensor by performing the following steps: CAUTION Di

iv

ServiceChapter 350Figure 3-4 Removing the Power Sensor’s CoverStep 2. At the other side of the sensor, again pry the cover shell sections apart. Remov

ServiceChapter 3 51Figure 3-5 Power Sensor Hardware LocationsReassembly Procedures CAUTION The gold wires connecting the A1 Bulkhead Assembly and the

ServiceChapter 352Step 2. Insert cap screws 8, 9, 11, 12, 14, and 15 but do not tighten. Step 3. Center the circuit board so there is equal air gap be

53A EPM Series Power Meter (E4418B) ModificationThis Appendix describes the modification procedure for adapting an E4418B Power Meter to allow it to

EPM Series Power Meter (E4418B) ModificationAppendix A54The Material and Tools RequiredThe following material and tools are required for this modifica

EPM Series Power Meter (E4418B) ModificationAppendix A 55Modification ProcedureCAUTION Precautions must be taken to protect the Power Meter’s PCBs fro

EPM Series Power Meter (E4418B) ModificationAppendix A56Step 2. Remove the power meter handle. To remove the handle, pull the 2 ends as shown in Figur

EPM Series Power Meter (E4418B) ModificationAppendix A 57Step 4. Figure A-4 shows the power meter with its cover removed.Figure A-4Step 5. Use the raz

EPM Series Power Meter (E4418B) ModificationAppendix A58Step 6. Figure A-6 shows a different view of the holes in the rear panel. Figure A-6Step 7. Us

EPM Series Power Meter (E4418B) ModificationAppendix A 59Step 8. Securely fit the three BNC connectors into the three holes in the rear panel, as show

Contents 11. IntroductionGeneral Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2Instr

EPM Series Power Meter (E4418B) ModificationAppendix A60Step 10. Figure A-10 shows a different view of the modified Measurement PCB. Figure A-10Step 1

61B Bulkhead AssembliesThis Appendix contains the material lists and exploded graphics of the Bulkhead Assemblies.

Bulkhead AssembliesAppendix B62Bulkhead Parts ListsTable B-1 Bulkhead Parts for the 8481A, 8481B, 8482B, and 8482B ModelsReference DesignatorPart Desc

Bulkhead AssembliesAppendix B 63Table B-2 Bulkhead Parts for the 8481D ModelReference DesignatorPart Description Sensor Model8481DMP1 Connector Nut 50

Bulkhead AssembliesAppendix B64Table B-3 Bulkhead Parts for the 8481H and 8482H ModelsReference DesignatorPart Description Sensor Model8481H 8482HMP1

Bulkhead AssembliesAppendix B 65MP25 Inner Conductor Spacer 5020-8540 or 08742-0005 5020-8540 or 08742-0005MP26 Flat Washer 2190-0831 or 3050-0622 -A1

Bulkhead AssembliesAppendix B66Table B-4 Bulkhead Parts for the 8483A ModelReference DesignatorPart Description Sensor Model8483AMP1 Connector Nut 502

Bulkhead AssembliesAppendix B 67Table B-5 Bulkhead Parts for the 8485A and 8485D ModelsReference DesignatorPart Description Sensor Model8485A 8485A Op

Bulkhead AssembliesAppendix B68Table B-6 Bulkhead Parts for the 8487A and 8487D ModelsReference DesignatorPart Description Sensor Model8487A 8487DMP1

Bulkhead AssembliesAppendix B 69Bulkhead Exploded GraphicsFigure B-1 8481A and 8481B

2 ContentsPower Measurements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21Modulation Effects . . . . . .

Bulkhead AssembliesAppendix B70Figure B-2 8481A Option 001

Bulkhead AssembliesAppendix B 71Figure B-3 8482A and 8482B

Bulkhead AssembliesAppendix B72Figure B-4 8481D

Bulkhead AssembliesAppendix B 73Figure B-5 8481H and 8482H8481H Only8481H Only

Bulkhead AssembliesAppendix B74Figure B-6 8483A

Bulkhead AssembliesAppendix B 75Figure B-7 8485A, 8485A Opt 033, 8485D, and 8485D Opt 033

Bulkhead AssembliesAppendix B76Figure B-8 8487A and 8487D

Contents 3FET Balance Adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .45Equipment Required. . . .