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Agilent Technologies e4419b, e4418b manual Using the above values gives, 1.224 ⋅

Models: e4419b e4418b

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4RCFMM

Measurement Uncertainty Analysis – Power Reference Level Test

Measurement Introduction

Using the above values gives

d

2(V1 – V0)

–4 V

Ci

Vcomp

=

PM = -----------------------------

= 2.129 ⋅

10

----

dVcomp

4RCFMs

Ω

d

2Vcomp – 2V1

–2 V

Ci

=

PM =

----------------------------------------

=

1.224 ⋅

10

----

V1

dV1

4RCFMs

Ω

d

(–2)Vcomp + 2V0

–2 V

Ci

V0

=

PM = ------------------------------------------------

= –1.245

⋅ 10

----

dV0

4RCFMs

Ω

d

(–2)Vcomp(V1 – V0) + V02 – V12

–6 W

Ci

R

=

PM = --------------------------------------------------------------------------------------------

=

–4.727 ⋅

10

-----

dR

4R2CFMs

Ω

CiCF =

d

PM =

(–2)Vcomp(V1 – V0) + V02 – V12

–4

W

--------------------------------------------------------------------------------------------

= –9.696 ⋅ 10

dCF

4RCF2Ms

CiMs =

d

PM =

(–2)Vcomp(V1 – V0) + V02 – V12

–4

W

--------------------------------------------------------------------------------------------

= –9.454 ⋅ 10

dMs

2

Agilent E4416A/E4417A Service Guide

B-11

Image 139

Agilent Technologies e4419b, e4418b manual Using the above values gives, 1.224 ⋅

Contents

Service Guide Agilent Technologies E4418B/E4419B Power MetersCopyright 1998, 2003Agilent Technologies Agilent E4418B/E4419B Service GuidePrinted in the UK Legal Information WarrantyCertification Exclusive Remedies Limitation of WarrantyEquipment Operation Personal Safety ConsiderationsWarnings and Cautions Markings General Safety ConsiderationsUser Environment Installation InstructionsIEC 1010-1 Compliance Statement of ComplianceAgilent E4418B/E4419B Service Guide is available by ordering Option List of Related PublicationsSales and Service Offices Latin America EuropeUnited States Package the Power Meter for Shipment Returning Your Power Meter for ServiceChapter 6 Troubleshooting About this GuideChapter 1 Specifications Chapter 3 AdjustmentsPage Table of ContentsTest Procedure Test SetupProcedure SpecificationMeasurement Uncertainty Analysis Instrument Accuracy Test1 Measurement Uncertainty Analysis Power Reference Level Test1 Specifications Introduction IntroductionPower Sensors Power Meter SpecificationsMeter Power RangeInstrumentation AccuracyTable 1-1 Zero Set Specifications Power Sensor50 MHz nominal 1 mW Power Reference1Measurement Speed Power Meter Supplemental CharacteristicsZero Drift of Sensors Noise Multiplier Measurement NoiseNormal Mode x2 modeMeasurement Noise Zero Driftx2 mode Settling TimeFor Agilent 8480 series power sensors Normal ModeSettling Time s For Agilent E-series power sensorsNormal Mode x2 modeMaximum dBm Normal Modex2 Mode Maximum dBmMeasurement Noise Power Sensor SpecificationsDefinitions Zero Set Zero DriftTypical Operating Time Battery Option 001 Operational CharacteristicsService Life WeightRecorder Outputs General CharacteristicsRear Panel Connectors Line PowerStorage Conditions Environmental CharacteristicsGeneral Conditions Operating EnvironmentGeneral DimensionsWeight SafetyBattery Remote ProgrammingNon-Volatile Memory Command LanguageGeneral Agilent E4418B/E4419B Service GuideSpecifications 1-18Performance Tests User’s Guide IntroductionPerformance Tests Equipment Equipment RequiredCritical Specification Table 2-1 Required EquipmentCalibration Cycle Test ProceduresPerformance Test Record Performance TestsDescription SpecificationTest Setup Zero TestInput Settings ProcedureDescription Test ProcedureInstrument Accuracy Test SpecificationConfirm Test SetupProcedure Figure 2-2 Instrument Accuracy Test SetupWhen switching the range calibrator to STANDBY, allow enough 10 ∝W 3 ∝W30 ∝W Equipment Test ProcedureTest Setup Figure 2-3 Instrument Accuracy Average Path Test Setupchassis of the 11683A option H01 range calibrator unless Procedurethe power meter is connected There is a small risk of mild electrical shock from theInput Settings , More Table 2-4 Instrument Accuracy Results Electrical Power Reference Level TestCharacteristics DescriptionEquation 2-4 Power Level Provided By The Reference Oscillator Power Test SetupProcedure Figure 2-4 Power Reference Level Test Setup0.999 mW Press , Power Ref OnTable 2-5 Power Reference Level Test Result Actual ResultProcedure Agilent E-Series Power Sensor Interface TestAgilent E-Series Power Sensor Interface Test Description Agilent E-Series Power Sensor Functional TestProcedure Figure 2-5 Sensor Functional Test SetupFigure 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 covers removed. Maintenance should be performed only by Safety ConsiderationsAdjustments described in this chapter are performed with power applied to the instrument and with protectiveRelated Adjustments, Performance Post-Repair AdjustmentsTable 3-1 Post Repair Adjustments, Tests, and Checks Assembly ReplacedDescription Power Reference Oscillator Frequency AdjustmentProcedure Figure 3-1 Adjustment SetupFigure 3-2 A2L9 Adjustment Location Power Reference Oscillator Level Adjustment Power Reference Oscillator Level AdjustmentDescription Vcomp + INPUTINPUT Thermistor MountEquipment ProcedureZero Cal Power Ref OnFigure 3-4 A2R90 Adjustment Location Measurement UncertaintyService Display Brightness and Contrast AdjustmentIntroduction Procedure3-12 Agilent E4418B/E4419B Service GuideAdjustments Display Brightness and Contrast AdjustmentTheory of Operation Theory of Operation IntroductionIntroduction 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 pressing System , More , Service , Self Test, Individual A3 Front Panel AssemblyDisplay 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 Assembly4-13 Agilent E4418B/E4419B Service GuideA8 Rechargeable Battery Assembly Remove this page and replace with pullout.fmTheory of Operation Agilent E4418B/E4419B Service GuideA8 Rechargeable Battery Assembly 4-14Replaceable Parts Replaceable Parts IntroductionAgilent Part Assembly Part NumbersReference DescriptionDesignator ReferenceDescription Agilent PartPower 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 Agilent E4418B/E4419B Service Guide Removing the A7 Fan Assembly1. Remove the A1 power supply assembly as shown on page 2. Remove the pins which attach the fan to the chassisThis power meter uses a lithium battery which may explode if Removing the Power Meter RAM Battery BT1battery terminals or to excessive heat Removing the A3 Front Panel Assembly Front panel sensor retaining clip recess Replacing the Front Panel Power Sensor Cable AssembliesReplaceable Parts Agilent E4418B/E4419B Service GuideAssembly and Disassembly Guidelines 5-17Replacing the Front Panel Power Reference Cable Assembly Rear panel sensor retaining clip recess Replaceable Parts Agilent E4418B/E4419B Service GuideAssembly and Disassembly Guidelines 5-20Replacing the Rear Panel Power Reference Cable Assembly Option Replacing the Rear Panel Recorder Outputs Cable Assembly Replacing The Chassis Assembly Replaceable Parts Agilent E4418B/E4419B Service GuideAssembly and Disassembly Guidelines 5-24Troubleshooting Troubleshooting Suggested Diagnostic EquipmentIntroduction Self Test Errors? TroubleshootingStart Power Up meter POST Pass? Connect Sensor to Channel A Any Sensor Errors?TTL Output On, Fail O/P Low TroubleshootingPreset/local Confirm Meas/Setup Limits Limits On TTL Output IntroductionSelf Test Errors? TroubleshootingStart Power Up meter POST Pass? Connect Sensor to Channel A Any Sensor Errors?Troubleshooting Agilent E4418B/E4419B Service GuideIntroduction Errors? TroubleshootingStart Power Up meter POST Any Sensor Errors?YesDual Agilent E4418B/E4419B Service GuideTroubleshooting IntroductionTroubleshooting Agilent E4418B/E4419B Service GuideIntroduction Start TroubleshootingIntroduction All/OtherMeasurement Uncertainty Analysis Instrument Accuracy Test Appendix APower Meter Measurement IntroductionDefine the Measurand UncertaintiesDefine the Measurement Equation u2MA = CTSE ⋅ uTSE 2 + CMV ⋅ u MV Uncertainty EquationConversion to Linear Units Power LevelStandard Uncertainty uxi Standard Deviation ofVoltage Error Worst case error on 0.1V rangeVoltage Error Worst case error on 1V rangeDistribution Worst case error on 15.8V maximum power settingVoltage Error Power mWSensitivity Coefficients Ci Expanded Uncertainty kucy Combined Standard Uncertainty ucyMeasurement Introduction Agilent E4416A/E4417A Service GuideA-10 Measurement Uncertainty Analysis - Instrument Accuracy TestAppendix B Measurement Uncertainty Analysis - Power Reference Level TestMeasurement Uncertainty Analysis - Power Reference Level Test Pmeas = Measurement IntroductionDefine the Measurand Define the Measurement EquationPmeas = fVcomp,V1,V0,R,CF,Ms Figure B-1 Measurement Setup1 j = ∑i + Uncertainty EquationVoltage Measurements Uncertainty MsUncertainty = 1 ⁄ 1±2PsPdUncertainty Mismatch= ±49.25uV Voltage measurementVSWR + VSWR1.05 + Sensor Calibration Factor Drift Calibration factoru Ms = ---------------------------------------------------- = 200 ⋅ 10 + 5 + 3 1000 ⋅ 0.5 + ResistanceRepeatability 10ppm of reading + 0.5ppm of rangeREF. LEVEL TEST ADJUST REFTable B-1 Measurement Repeatability Results MeasurementSensitivity 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