Agilent Technologies 1912A Service Manual

Keysight N1911A/1912A P-Series Power MetersService Guide

viii N1911A/1912A P-Series Power Meters Service GuideOut position of bi-stable push control.

6Repair Guide80 N1911A/1912A P-Series Power Meters Service GuideN1912-61025 Cable clamp34401-86020 Bumper kit34401-45021 HandleKeysight Part NumberDes

Repair Guide 6N1911A/1912A P-Series Power Meters Service Guide 81SundriesKeysight Part NumberDescription VisualN1911-61004N1912-80005Calibrator semi-r

6Repair Guide82 N1911A/1912A P-Series Power Meters Service GuideTools RequiredKeysight Part NumberDescription VisualN1911-61004N1912-80005• 3 unit of

Repair Guide 6N1911A/1912A P-Series Power Meters Service Guide 83Required Torque Values for FastenersRequired tools and torque values for fasteners ar

6Repair Guide84 N1911A/1912A P-Series Power Meters Service GuideDisassembly InstructionsThe guidelines in this section describe the disassembly of the

Repair Guide 6N1911A/1912A P-Series Power Meters Service Guide 85• Remove the top clamshell (Figure 6-3): Disconnect the mains power connector from t

6Repair Guide86 N1911A/1912A P-Series Power Meters Service Guide• Remove the PSU (Figure 6-5): Use the T10 Torx screwdriver bit to remove the 6 screws

Repair Guide 6N1911A/1912A P-Series Power Meters Service Guide 87• With reference to Figure 6-6 and Figure 6-7:• Lift and remove the cable clamp. • Di

6Repair Guide88 N1911A/1912A P-Series Power Meters Service Guide• Disconnect the front panel cable (Figure 6-9): Depress both sides of theconnector h

Repair Guide 6N1911A/1912A P-Series Power Meters Service Guide 89• Remove the front panel (Figure 6-11): Carefully lift and remove the front panel ass

N1911A/1912A P-Series Power Meters Service Guide ixEnvironmental ConditionsThis instrument is designed for indoor use. The table below shows the gener

6Repair Guide90 N1911A/1912A P-Series Power Meters Service Guide• Remove DAP/PPMC (Figure 6-12): Use the T8 Torx screwdriver bit to remove the screws

Repair Guide 6N1911A/1912A P-Series Power Meters Service Guide 91• Remove the rear panel (Figure 6-14): Use the N1912-61807 special tooling kit to re

6Repair Guide92 N1911A/1912A P-Series Power Meters Service GuideReassembly InstructionsInstructions Visual• The reassembly process is simply the rever

Repair Guide 6N1911A/1912A P-Series Power Meters Service Guide 93• Sensor RF connections (Figure 6-17): E – Channel A(+), Black cable F – Channel

6Repair Guide94 N1911A/1912A P-Series Power Meters Service Guide• PSU cable routing (Figure 6-19): Ensure the PSU cables are positioned such that the

Repair Guide 6N1911A/1912A P-Series Power Meters Service Guide 95Disassembly vs Part ReplacementDisassembly of Replacement Part InstructionsMain board

6Repair Guide96 N1911A/1912A P-Series Power Meters Service GuideDAP assembly, Channel A (Rear connectors option)• Remove handle, bumpers, and top clam

Repair Guide 6N1911A/1912A P-Series Power Meters Service Guide 97Sensor flex assembly (rear connectors option)• Remove handle and front/rear Bumpers•

6Repair Guide98 N1911A/1912A P-Series Power Meters Service GuideFront Panel Disassembly InstructionsInstructions VisualIMPORTANT NOTE:• The front pane

Repair Guide 6N1911A/1912A P-Series Power Meters Service Guide 99Step 2:• Use ODU socket to remove N1912-61806 sensor flex assembly• Release the tab h

x N1911A/1912A P-Series Power Meters Service GuideRegulatory MarkingsThe CE mark is a registered trademarkof the European Community. This CEmark shows

6Repair Guide100 N1911A/1912A P-Series Power Meters Service GuideStep 5:• Remove the 4 screws that attach the display to the display support molding,

Repair Guide 6N1911A/1912A P-Series Power Meters Service Guide 101Step 7:• Remove the 3 screws that attach the calibrator assembly to the display supp

6Repair Guide102 N1911A/1912A P-Series Power Meters Service GuideStep 10:• Release the metal tabs holding the EMI screen to the front panel sub-frame,

Repair Guide 6N1911A/1912A P-Series Power Meters Service Guide 103Front Panel Reassembly InstructionsInstructions VisualStep 1:• Insert the keymat int

6Repair Guide104 N1911A/1912A P-Series Power Meters Service GuideStep 4:• Overlay the EMI screen onto the key flex circuit, ensuring that all of the m

Repair Guide 6N1911A/1912A P-Series Power Meters Service Guide 105Step 6:• Attach the inverter board to the display interface board using the 2 screws

6Repair Guide106 N1911A/1912A P-Series Power Meters Service GuideStep 10:• Fit the split washer to the calibrator assemblyStep 11:• Attach the display

Repair Guide 6N1911A/1912A P-Series Power Meters Service Guide 107Step 13:• Attach the front panel sub-frame to the display support moulding, ensuring

6Repair Guide108 N1911A/1912A P-Series Power Meters Service GuideAdditional Repair NotesReplacing A Sensor Flex Assembly:• The Sensor flex assembly is

Repair Guide 6N1911A/1912A P-Series Power Meters Service Guide 109Main Board vs. Rear Panel AssemblyInstructions Visual• Due to a difference in the co

N1911A/1912A P-Series Power Meters Service Guide xiIn This Guide ...1Specifications Chapter 1 lists the power meter’s specifications and describes how

6Repair Guide110 N1911A/1912A P-Series Power Meters Service GuideReplacing the PPMC Assembly• The PPMC assembly is pre- programmed with N1912A firmwar

Repair Guide 6N1911A/1912A P-Series Power Meters Service Guide 111Replacing the Calibrator Semi-Rigid/Split FerriteInstructions Visual• Separate the t

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N1911A/1912A P-Series Power MetersService Guide7Contacting Keysight TechnologiesIntroduction 114Before Calling Keysight Technologies 115Check the Basi

7 Contacting Keysight Technologies114 N1911A/1912A P-Series Power Meters Service GuideIntroductionContacting Keysight TechnologiesThis section details

Contacting Keysight Technologies 7N1911A/1912A P-Series Power Meters Service Guide 115Before Calling Keysight TechnologiesBefore calling Keysight Tech

7 Contacting Keysight Technologies116 N1911A/1912A P-Series Power Meters Service GuideCheck the BasicsProblems can be solved by repeating what was bei

Contacting Keysight Technologies 7N1911A/1912A P-Series Power Meters Service Guide 117Instrument Serial NumbersKeysight Technologies makes frequent im

7 Contacting Keysight Technologies118 N1911A/1912A P-Series Power Meters Service GuideKeysight Sales and Service OfficesIn any correspondence or telep

Contacting Keysight Technologies 7N1911A/1912A P-Series Power Meters Service Guide 119Returning Your Power Meter for ServiceUse the information in thi

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7 Contacting Keysight Technologies120 N1911A/1912A P-Series Power Meters Service GuideUseful Web Pages• Main Product Pagewww.keysight.com/find/wideban

www.keysight.comContact usTo obtain service, warranty, or technical support assistance, contact us at the following phone numbers:United States:(tel)

This information is subject to change without notice.© Keysight Technologies 2006 - 2014Edition 14, November 2014*N1912-90015*N1912-90015www.keysight.

N1911A/1912A P-Series Power Meters Service Guide xiiiContentsNotices iiCertification iiiLimitation of Warranty iiiExclusive Remedies iiiEquipment Ope

xiv N1911A/1912A P-Series Power Meters Service GuideLinearity (Average Path) 32Linearity (Peak Path) 33Rise/Fall Time (Peak Path) 343 AdjustmentsIn

N1911A/1912A P-Series Power Meters Service Guide xvFront Panel Disassembly Instructions 98Front Panel Reassembly Instructions 103Additional Repair No

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N1911A/1912A P-Series Power Meters Service Guide xviiList of FiguresFigure 2-1 1 mW Power Reference Level Test Setup Connection Diagram 23Figure 2

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N1911A/1912A P-Series Power MetersService Guide1SpecificationsIntroduction 2Specification Definitions 3General Features 5P-Series Power Meter and Sens

1 Specifications2 N1911A/1912A P-Series Power Meters Service GuideIntroductionThis chapter details the power meter’s specifications and supplemental c

Specifications 1N1911A/1912A P-Series Power Meters Service Guide 3Specification DefinitionsThere are two types of product specifications:Warranted spe

1 Specifications4 N1911A/1912A P-Series Power Meters Service GuideConditionsThe power meter and sensor will meet its specifications when:• stored for

Specifications 1N1911A/1912A P-Series Power Meters Service Guide 5General Features1 Information contained in this document refers to operation with P-

1 Specifications6 N1911A/1912A P-Series Power Meters Service GuideP-Series Power Meter and Sensor Key System Specifications and Characteristics3 Speci

Specifications 1N1911A/1912A P-Series Power Meters Service Guide 7Figure 1-1 Measured rise time percentage error versus signal under test rise timeAlt

1 Specifications8 N1911A/1912A P-Series Power Meters Service GuideP-Series Power Meter SpecificationsMeter uncertaintyInstrumentation linearity ± 0.8

Specifications 1N1911A/1912A P-Series Power Meters Service Guide 96 Internal trigger latency is defined as the delay between the applied RF crossing t

1 Specifications10 N1911A/1912A P-Series Power Meters Service GuideP-Series Wideband Power Sensor SpecificationsThe P- Series wideband power sensors a

Specifications 1N1911A/1912A P-Series Power Meters Service Guide 11Sensor Calibration Uncertainty9Definition: Uncertainty resulting from non- lineari

1 Specifications12 N1911A/1912A P-Series Power Meters Service Guide1 mW Power ReferenceRear panel inputs/outputsNOTEThe 1mW power reference is provide

Specifications 1N1911A/1912A P-Series Power Meters Service Guide 13Remote ProgrammingMeasurement SpeedRegulatory InformationInterfaceGPIB interface op

1 Specifications14 N1911A/1912A P-Series Power Meters Service GuidePhysical CharacteristicsEnvironmental ConditionsDimensionsThe following dimensions

Specifications 1N1911A/1912A P-Series Power Meters Service Guide 15System Specifications and CharacteristicsThe video bandwidth in the meter can be se

1 Specifications16 N1911A/1912A P-Series Power Meters Service GuideCharacteristics Peak FlatnessThe peak flatness is the flatness of a peak- to- avera

Specifications 1N1911A/1912A P-Series Power Meters Service Guide 17Noise and drift12 Within 1 hour after a zero, at a constant temperature, after 24 h

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N1911A/1912A P-Series Power MetersService Guide2Performance TestsIntroduction 20Complete Equipment List 211 mW Power Reference Level Test 23Output Sta

ii N1911A/1912A P-Series Power Meters Service GuideNotices© Keysight Technologies 2006 - 2014No part of this manual may be reproduced in any form or b

2Performance Tests20 N1911A/1912A P-Series Power Meters Service GuideIntroductionThe performance tests described in this chapter test the power meter’

Performance Tests 2N1911A/1912A P-Series Power Meters Service Guide 21Complete Equipment ListInstrument Critical Specifications Recommended Keysight M

2Performance Tests22 N1911A/1912A P-Series Power Meters Service GuidePulse/Data generator81131A Output modules required81130APower splitter required F

Performance Tests 2N1911A/1912A P-Series Power Meters Service Guide 231 mW Power Reference Level TestDescriptionThe 1 mW power reference is used for t

2Performance Tests24 N1911A/1912A P-Series Power Meters Service GuideTest Method1 Enter the recorded measurement uncertainty of the E4419B or E4417A 1

Performance Tests 2N1911A/1912A P-Series Power Meters Service Guide 25Output Standing Wave Ratio (SWR) TestDescriptionConnector mismatch is the larges

2Performance Tests26 N1911A/1912A P-Series Power Meters Service GuideFigure 2-2 System Calibration Connection DiagramFigure 2-3 Output SWR Test Setup

Performance Tests 2N1911A/1912A P-Series Power Meters Service Guide 27Test Method1 Obtain the S11 parameter of the calibration system.2 Connect the me

2Performance Tests28 N1911A/1912A P-Series Power Meters Service GuideTime Base Frequency AccuracyDescriptionThe accuracy of the 100 MHz sample clock d

Performance Tests 2N1911A/1912A P-Series Power Meters Service Guide 29Test Method1 Enable the path that routes the time base signal to the trigger out

N1911A/1912A P-Series Power Meters Service Guide iiiCertificationKeysight Technologies certifies that this product met its published specifications at

2Performance Tests30 N1911A/1912A P-Series Power Meters Service GuideZero Set (Average Path)DescriptionZero set is defined as the amount of residual o

Performance Tests 2N1911A/1912A P-Series Power Meters Service Guide 31Zero Set (Peak Path)DescriptionZero set is defined as the amount of residual off

2Performance Tests32 N1911A/1912A P-Series Power Meters Service GuideLinearity (Average Path)DescriptionLinearity over the full input voltage range of

Performance Tests 2N1911A/1912A P-Series Power Meters Service Guide 33Linearity (Peak Path)DescriptionLinearity over the full input voltage range of t

2Performance Tests34 N1911A/1912A P-Series Power Meters Service GuideRise/Fall Time (Peak Path)DescriptionThe rise and fall time performance of the in

Performance Tests 2N1911A/1912A P-Series Power Meters Service Guide 35Test Method1 Capture a train of 10 pulses with very fast rise/fall times.2 Combi

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N1911A/1912A P-Series Power MetersService Guide3AdjustmentsIntroduction 38Power Reference Level Adjustment 39This chapter contains checks and adjustme

3 Adjustments38 N1911A/1912A P-Series Power Meters Service GuideIntroductionAttempts to correct the power reference level if the performance test has

Adjustments 3N1911A/1912A P-Series Power Meters Service Guide 39Power Reference Level AdjustmentEquipment• As per the test equipment list for the powe

iv N1911A/1912A P-Series Power Meters Service GuideEquipment OperationWarnings and CautionsThis guide uses warnings and cautions to denote hazards.Per

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N1911A/1912A P-Series Power MetersService Guide4Theory of OperationPPMC Assembly 42Main Board Assembly 43DAP Assembly 44Calibrator Assembly 45Front Pa

4 Theory of Operation42 N1911A/1912A P-Series Power Meters Service GuidePPMC AssemblyPurpose• Provides the main processor and memory for the power met

Theory of Operation 4N1911A/1912A P-Series Power Meters Service Guide 43Main Board AssemblyPurpose• Provides the average measurement path(s)• Provides

4 Theory of Operation44 N1911A/1912A P-Series Power Meters Service GuideDAP AssemblyPurpose• Provides data acquisition and processing for the peak mea

Theory of Operation 4N1911A/1912A P-Series Power Meters Service Guide 45Calibrator AssemblyPurpose• Provides a 1 mW (0 dBm) power reference level at 5

4 Theory of Operation46 N1911A/1912A P-Series Power Meters Service GuideFront Panel AssemblyPurpose• Provides a keyboard as the manual user interface•

Theory of Operation 4N1911A/1912A P-Series Power Meters Service Guide 47PSU AssemblyPurpose:• Provides various DC power suppliesInputs:• 100 Vac~ 240

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N1911A/1912A P-Series Power MetersService Guide5Troubleshooting GuideIntroduction 50Power-Up Problems 51Instrument Self-Test 52Extended Self-Test 54Pe

N1911A/1912A P-Series Power Meters Service Guide vGeneral Safety ConsiderationsThe following general safety precautions must be observed during all ph

5 Troubleshooting Guide50 N1911A/1912A P-Series Power Meters Service GuideIntroductionThis chapter enables qualified service personnel to diagnose sus

Troubleshooting Guide 5N1911A/1912A P-Series Power Meters Service Guide 51Power-Up ProblemsBasic External Checks• Check the mains power source is live

5 Troubleshooting Guide52 N1911A/1912A P-Series Power Meters Service GuideInstrument Self-TestInstrument Purpose Debug Tips Possible FaultsTest point

Troubleshooting Guide 5N1911A/1912A P-Series Power Meters Service Guide 53ChB peak path Verifies that the peak path of channel B is working(Note: This

5 Troubleshooting Guide54 N1911A/1912A P-Series Power Meters Service GuideExtended Self-TestInstrument Purpose Debug Tips Possible FaultsKeyboard Veri

Troubleshooting Guide 5N1911A/1912A P-Series Power Meters Service Guide 55Performance TestType of Failures Debug Tips Possible Faults1 mW power refere

5 Troubleshooting Guide56 N1911A/1912A P-Series Power Meters Service GuidePower Reference Level Adjustment ProblemsPossible Faults• Calibrator assembl

Troubleshooting Guide 5N1911A/1912A P-Series Power Meters Service Guide 57Communication Interface FailuresType of Communication Debug Tips Possible Fa

5 Troubleshooting Guide58 N1911A/1912A P-Series Power Meters Service GuideAdditional Diagnostic TestsType of Functionality Reason Recommended Test Met

N1911A/1912A P-Series Power MetersService Guide6Repair GuideIntroduction 60Replaceable Parts 61 Front Panel Assembly 61 Main Board Assembly 69

vi N1911A/1912A P-Series Power Meters Service GuideSafety SymbolsThe following symbol on the instrument and in the documentation indicates precautions

6Repair Guide60 N1911A/1912A P-Series Power Meters Service GuideIntroductionThis chapter contains details of some of the higher level components and a

Repair Guide 6N1911A/1912A P-Series Power Meters Service Guide 61Replaceable PartsFront Panel AssemblyMain AssemblyThe standard P- Series power meter

6Repair Guide62 N1911A/1912A P-Series Power Meters Service GuideCustomization DetailsThe standard P- Series power meters have the input sensor connect

Repair Guide 6N1911A/1912A P-Series Power Meters Service Guide 63Customization PartsKeysight Part NumberDescription VisualN1912-61806Sensor flex assem

6Repair Guide64 N1911A/1912A P-Series Power Meters Service GuideKeysight Part NumberDescription VisualN1912-00025N1912-00026N1912-00027Blank front pan

Repair Guide 6N1911A/1912A P-Series Power Meters Service Guide 65Replaceable PartsKeysight Part NumberDescription VisualN1912-40003 Front panel sub-fr

6Repair Guide66 N1911A/1912A P-Series Power Meters Service GuideN1912-66502 Key flex circuitNote:• This key flex circuit is used on all variants of th

Repair Guide 6N1911A/1912A P-Series Power Meters Service Guide 672090-0825 DisplayNote:• This display is used on all variants of the front panel assem

6Repair Guide68 N1911A/1912A P-Series Power Meters Service Guide0950-4111 Inverter boardNote:• This inverter board is used on all variants of the fron

Repair Guide 6N1911A/1912A P-Series Power Meters Service Guide 69Main Board AssemblyKeysight Part NumberDescription VisualN1911-61801(non-video output

N1911A/1912A P-Series Power Meters Service Guide viiPROTECTIVE CONDUCTOR TERMINAL.Frame or chasis TERMINAL.Equipotentiality.On (Supply).Off (Supply).E

6Repair Guide70 N1911A/1912A P-Series Power Meters Service GuidePPMC (Processor PCI Mezzanine) AssemblyKeysight Part NumberDescription VisualN1911-665

Repair Guide 6N1911A/1912A P-Series Power Meters Service Guide 71DAP (Digital Acquisition & Processing) AssemblyKeysight Part NumberDescription Vi

6Repair Guide72 N1911A/1912A P-Series Power Meters Service GuidePSU (Power Supply Unit)Keysight Part NumberDescription VisualN1912-61808 Power supply

Repair Guide 6N1911A/1912A P-Series Power Meters Service Guide 73Rear Panel AssemblyMain AssemblyCustomization DetailsThe standard P- Series power met

6Repair Guide74 N1911A/1912A P-Series Power Meters Service GuideCustomization PartsN1911A (front connectors option)1 unit of sensor flex assembly1 uni

Repair Guide 6N1911A/1912A P-Series Power Meters Service Guide 75N1912-61806 Sensor flex assemblyE4418-61015 Recorder output cable6960-00816960-002469

6Repair Guide76 N1911A/1912A P-Series Power Meters Service GuideAdditional Spare PartsKeysight Part NumberDescription VisualN1912-61036 Line moduleN4

Repair Guide 6N1911A/1912A P-Series Power Meters Service Guide 77Calibrator AssemblyKeysight Part NumberDescription VisualN1911-61001 Calibrator assem

6Repair Guide78 N1911A/1912A P-Series Power Meters Service GuideImproved calibrator assemblyThe N1911A/N1912A calibrator assembly is improved with a n

Repair Guide 6N1911A/1912A P-Series Power Meters Service Guide 79Outer Housing ComponentsKeysight Part NumberDescription Visual5041-7717 Clamshell (t