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Agilent Technologies e4419b, e4418b manual A3 Front Panel Assembly, Display

Models: e4419b e4418b

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A3 Front Panel Assembly

Theory of Operation

A3 Front Panel Assembly

A3 Front Panel Assembly

The front panel assembly is made up of a liquid crystal display (LCD), a keypad and, depending on the power meter option, a power reference cable assembly and a sensor cable assembly(s).

There are two inputs to the front panel assembly:

•the flex circuit from connector A2J4 of the processor assembly which controls the keypad.

•the ribbon cable from A2J3 of the processor assembly which controls the LCD display.

The power meter self tests contain display tests. These are accessed by

pressing System , More , Service , Self Test, Individual ,

Inputs

Display .

Agilent E4418B/E4419B Service Guide

4-7

Image 77

Agilent Technologies e4419b A3 Front Panel Assembly, pressing System , More , Service , Self Test, Individual, Display

Contents

Service Guide Agilent Technologies E4418B/E4419B Power MetersPrinted in the UK Agilent E4418B/E4419B Service GuideCopyright 1998, 2003Agilent Technologies Certification WarrantyLegal Information Exclusive Remedies Limitation of WarrantyWarnings and Cautions Personal Safety ConsiderationsEquipment Operation Markings General Safety ConsiderationsIEC 1010-1 Compliance Installation InstructionsStatement of Compliance User EnvironmentAgilent E4418B/E4419B Service Guide is available by ordering Option List of Related PublicationsSales and Service Offices United States EuropeLatin America Package the Power Meter for Shipment Returning Your Power Meter for ServiceChapter 1 Specifications About this GuideChapter 3 Adjustments Chapter 6 TroubleshootingPage Table of ContentsProcedure Test SetupSpecification Test ProcedureMeasurement Uncertainty Analysis Instrument Accuracy Test1 Measurement Uncertainty Analysis Power Reference Level Test1 Specifications Introduction IntroductionMeter Power Meter SpecificationsPower Range Power SensorsTable 1-1 Zero Set Specifications AccuracyPower Sensor Instrumentation50 MHz nominal 1 mW Power Reference1Zero Drift of Sensors Power Meter Supplemental CharacteristicsMeasurement Speed Normal Mode Measurement Noisex2 mode Noise MultiplierMeasurement Noise Zero DriftFor Agilent 8480 series power sensors Settling TimeNormal Mode x2 modeNormal Mode For Agilent E-series power sensorsx2 mode Settling Time sx2 Mode Normal ModeMaximum dBm Maximum dBmDefinitions Zero Set Power Sensor SpecificationsZero Drift Measurement NoiseService Life Battery Option 001 Operational CharacteristicsWeight Typical Operating TimeRear Panel Connectors General CharacteristicsLine Power Recorder OutputsGeneral Conditions Environmental CharacteristicsOperating Environment Storage ConditionsWeight DimensionsSafety GeneralNon-Volatile Memory Remote ProgrammingCommand Language BatterySpecifications Agilent E4418B/E4419B Service Guide1-18 GeneralPerformance Tests Performance Tests IntroductionUser’s Guide Critical Specification Equipment RequiredTable 2-1 Required Equipment EquipmentPerformance Test Record Test ProceduresPerformance Tests Calibration CycleTest Setup SpecificationZero Test DescriptionInput Settings ProcedureInstrument Accuracy Test Test ProcedureSpecification DescriptionProcedure Test SetupFigure 2-2 Instrument Accuracy Test Setup ConfirmWhen switching the range calibrator to STANDBY, allow enough 30 ∝W 3 ∝W10 ∝W Test Setup Test ProcedureFigure 2-3 Instrument Accuracy Average Path Test Setup Equipmentthe power meter is connected ProcedureThere is a small risk of mild electrical shock from the chassis of the 11683A option H01 range calibrator unlessInput Settings , More Table 2-4 Instrument Accuracy Results Characteristics Power Reference Level TestDescription ElectricalEquation 2-4 Power Level Provided By The Reference Oscillator Procedure Test SetupFigure 2-4 Power Reference Level Test Setup PowerTable 2-5 Power Reference Level Test Result Press , Power Ref OnActual Result 0.999 mWAgilent E-Series Power Sensor Interface Test Agilent E-Series Power Sensor Interface TestProcedure Procedure Agilent E-Series Power Sensor Functional TestFigure 2-5 Sensor Functional Test Setup DescriptionFigure 2-6 Sensor Functional Test Setup with Attenuator Table 2-6 Functional Test Result Performance Test Record Performance Test Record1. This test is not channel related Adjustments Adjustments described in this chapter are performed with Safety Considerationspower applied to the instrument and with protective covers removed. Maintenance should be performed only byTable 3-1 Post Repair Adjustments, Tests, and Checks Post-Repair AdjustmentsAssembly Replaced Related Adjustments, PerformanceProcedure Power Reference Oscillator Frequency AdjustmentFigure 3-1 Adjustment Setup DescriptionFigure 3-2 A2L9 Adjustment Location Description Power Reference Oscillator Level AdjustmentPower Reference Oscillator Level Adjustment INPUT + INPUTThermistor Mount VcompEquipment ProcedureZero Cal Power Ref OnFigure 3-4 A2R90 Adjustment Location Measurement UncertaintyIntroduction Display Brightness and Contrast AdjustmentProcedure ServiceAdjustments Agilent E4418B/E4419B Service GuideDisplay Brightness and Contrast Adjustment 3-12Theory of Operation Introduction IntroductionTheory of Operation A1 Power Supply/Battery Charger A1 Power Supply/Battery ChargerA2 Processor Assembly A2 Processor AssemblyAgilent E4418B/E4419B Service Guide The microcontroller circuits that control all the above functions, and Display A3 Front Panel Assemblypressing System , More , Service , Self Test, Individual A4 Comms Assembly A4 Comms AssemblyA5 Daughter Assembly A5 Daughter AssemblyA6 Measurement Assembly A6 Measurement AssemblyAgilent 8480 series power sensors this is 0 V and -10 V at 217 Hz A8 Rechargeable Battery Assembly A8 Rechargeable Battery AssemblyA8 Rechargeable Battery Assembly Agilent E4418B/E4419B Service GuideRemove this page and replace with pullout.fm 4-13A8 Rechargeable Battery Assembly Agilent E4418B/E4419B Service Guide4-14 Theory of OperationReplaceable Parts Replaceable Parts IntroductionReference Assembly Part NumbersDescription Agilent PartDescription ReferenceAgilent Part DesignatorPower Supply Assembly Types Front Panel Connector Repair Front Panel Connector RepairDownloading Firmware Firmware UpgradesRemoving the Power Meter Cover Assembly and Disassembly GuidelinesRemoving the A1 Power Supply Assembly n n n Removing the A2 Processor Assemblyscrews Removing the A4 Comms AssemblyRemoving the A5 Daughter or A6 Measurement Assemblies 1. Remove the A1 power supply assembly as shown on page Removing the A7 Fan Assembly2. Remove the pins which attach the fan to the chassis Agilent E4418B/E4419B Service Guidebattery terminals or to excessive heat Removing the Power Meter RAM Battery BT1This power meter uses a lithium battery which may explode if Removing the A3 Front Panel Assembly Front panel sensor retaining clip recess Replacing the Front Panel Power Sensor Cable AssembliesAssembly and Disassembly Guidelines Agilent E4418B/E4419B Service Guide5-17 Replaceable PartsReplacing the Front Panel Power Reference Cable Assembly Rear panel sensor retaining clip recess Assembly and Disassembly Guidelines Agilent E4418B/E4419B Service Guide5-20 Replaceable PartsReplacing the Rear Panel Power Reference Cable Assembly Option Replacing the Rear Panel Recorder Outputs Cable Assembly Replacing The Chassis Assembly Assembly and Disassembly Guidelines Agilent E4418B/E4419B Service Guide5-24 Replaceable PartsTroubleshooting Introduction Suggested Diagnostic EquipmentTroubleshooting Start Power Up meter POST Pass? TroubleshootingConnect Sensor to Channel A Any Sensor Errors? Self Test Errors?Preset/local Confirm Meas/Setup Limits Limits On TTL Output TroubleshootingIntroduction TTL Output On, Fail O/P LowStart Power Up meter POST Pass? TroubleshootingConnect Sensor to Channel A Any Sensor Errors? Self Test Errors?Introduction Agilent E4418B/E4419B Service GuideTroubleshooting Start Power Up meter POST TroubleshootingAny Sensor Errors?Yes Errors?Troubleshooting Agilent E4418B/E4419B Service GuideIntroduction DualIntroduction Agilent E4418B/E4419B Service GuideTroubleshooting Introduction TroubleshootingAll/Other StartMeasurement Uncertainty Analysis Instrument Accuracy Test Appendix APower Meter Measurement IntroductionDefine the Measurement Equation UncertaintiesDefine the Measurand u2MA = CTSE ⋅ uTSE 2 + CMV ⋅ u MV Uncertainty EquationStandard Uncertainty uxi Power LevelStandard Deviation of Conversion to Linear UnitsVoltage Error Worst case error on 0.1V rangeWorst case error on 1V range Voltage ErrorVoltage Error Worst case error on 15.8V maximum power settingPower mW DistributionSensitivity Coefficients Ci Expanded Uncertainty kucy Combined Standard Uncertainty ucyA-10 Agilent E4416A/E4417A Service GuideMeasurement Uncertainty Analysis - Instrument Accuracy Test Measurement IntroductionMeasurement Uncertainty Analysis - Power Reference Level Test Measurement Uncertainty Analysis - Power Reference Level TestAppendix B Define the Measurand Measurement IntroductionDefine the Measurement Equation Pmeas =Pmeas = fVcomp,V1,V0,R,CF,Ms Figure B-1 Measurement SetupVoltage Measurements Uncertainty Uncertainty EquationMsUncertainty = 1 ⁄ 1±2PsPd 1 j = ∑i += ±49.25uV MismatchVoltage measurement Uncertainty1.05 + VSWRVSWR + u Ms = ---------------------------------------------------- = Calibration factorSensor Calibration Factor Drift Repeatability Resistance10ppm of reading + 0.5ppm of range 200 ⋅ 10 + 5 + 3 1000 ⋅ 0.5 +Table B-1 Measurement Repeatability Results ADJUST REFMeasurement REF. LEVEL TESTSensitivity Coefficients Ci I mW Power Measured = fVcomp, V1, V0, R, CF, Ms1.224 ⋅ Using the above values givesCombined Standard Uncertainty ucy Expanded UncertaintyIndex Page Page Index-4 Agilent E4418B/E4419B Service Guide