HP 1GSa/s Digitizing Oscilloscope 16532A manual Setting the PROTECT/UNPROTECT Switch to Unprotect

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HP 16532A - Calibration

4-9. Setting the PROTECT/UNPROTECT Switch to UNPROTECT

The effects of ELECTROSTATIC DISCHARGE can damage electronic compo- nents. Use grounded wrist straps and mats when you are performing any kind of service on this module.

The oscilloscope board contains a calibration PROTECT/UNPROTECT switch. This switch must be set to UNPROTECT before calibration can be done. Set the switch to UNPROTECT as follows:

1.Remove power from the instrument. Pull halfway out all of the modules located above the oscilloscope and remove the filler panels and cards located above the oscilloscope. See figure 4-1 for the removal sequence.

Figure 4-1. Endplate Overlap - Top Sequence

2.Remove the oscilloscope module and set the PROTECT/UNPROTECT switch to the UNPROTECT position. See Figure 4-2 to locate this switch.

Figure 4-2. Location of the PROTECT/UNPROTECT Switch

3.Repeat step 2 for every oscilloscope module if this is a multimodule calibration.

4.Reinstall the modules and filler panels in reverse order of steps 1 and 2.

4-3

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Contents HP 16532A Safety Symbols Safety ConsiderationsContents Service CalibrationSection Replaceable Parts List of Tables Page Table of Contents Page Safety Requirements IntroductionModule Covered by This Manual Operating Characteristics Accessories SuppliedAccessories Available SpecificationsVertical dc Gain Accuracy4 ± 1.5% of full scale HP 16532A SpecificationsRise Time2 1.4 ns Waveform Record Length 8000 pointsHP 16532A Operating Characteristics Vertical at BNCTimebase Trigger Modes TriggeringDigitizer Trigger Level RangeDisplay Modes Waveform DisplayMeasurement Aids Operating Environment Setup AidsEquipment Critical Specifications Recommended Model USE Page Table of Contents Page Preparation for Use Power RequirementsInitial Inspection Safety Requirements Module InstallationProcedure Installation ConsiderationsEndplate Overlap Bottom Sequence Packaging Tagging for ServiceOperating Environment StorageTable of Contents Page Performance Test Procedures Test RecordPerformance Test Interval DC CAL Output Test AC CAL Output Test Specification Equipment Required Critical Specification Model/Part NumberInput Resistance Page Voltage Measurement Accuracy Voltage Measurement Accuracy Test Div Offset Supply Upper Limit Lower Limit Offset Accuracy Procedure Zero-Input OffsetDiv Offset Supply Min Max DC Input OffsetBandwidth V1MHz Time Measurement Accuracy Menu Selection Setting Trigger Sensitivity RUN Repetitive Performance Test Record Paragraph No Test Results Yes No Page Table of Contents Page Calibration Protection Switch Calibration IntervalMaintaining System Integrity Calibration Instrument WarmupLocation of the PROTECT/UNPROTECT Switch Setting the PROTECT/UNPROTECT Switch to UnprotectEquipment Required for Calibration Loading the Default Calibration FactorsCalibrate Delay of the Self Cal menu as follows Self Cal Menu CalibrationsCalibrate Vert Cal of the Self Cal menu as follows Calibrate the Logic Trigger of the Self Cal menu as follows Calibrate the Time Null of the Self Cal menu as followsExt Trig Null Calibration Connections Calibrate the Ext Trig Null of the Self Cal menu as followsSealing the Mainframe Setting the PROTECT/UNPROTECT Switch to ProtectTable of Contents Page Exchange Assemblies Replaceable Parts ListAbbreviations Ordering InformationDirect Mail Order System Reference Designator and Abbreviations Parts Identification Mfr Code Mfr Part Number Reference DesignatorHP Part Qty Number DescriptionPage Table of Contents Page Attenuator Theory of Operation Introduction Safety RequirementsModule Block Diagram and The- ory of Operation Main Assembly Theory of OperationHP 16532A Oscilloscope Block Diagram Page Self-Tests Self-Test Access ProcedureLoad Test System Screen Touch the Functional Tests field Functional Tests ScreenA/D Test Run Screen Exit Test System Screen Test Self-Test DescriptionsData Memory Test Timebase TestTroubleshooting Aids TroubleshootingVerifying the System Clock Page Troubleshooting E E T Troubleshooting Sheet1 6 5 3 2 a Troubleshooting E E T Troubleshooting E E T Troubleshooting E E T Troubleshooting E E T Oscilloscope Module Removal Procedure Oscilloscope Module Removal and Replacement12. Endplate Overlap Bottom Sequence Oscilloscope Module Replacement ProcedureTrigger Cable Removal Procedure Trigger Cable Removal and ReplacementAttenuator Removal and Replacement Trigger Cable Replacement ProcedureAttenuator Removal Procedure Attenuator Replacement Procedure Warranty CertificationAssistance