HP 1GSa/s Digitizing Oscilloscope 16532A manual Calibration Interval, Maintaining System Integrity

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HP 16532A - Calibration

4-1. Introduction

This section provides information on calibrating the HP 16532A 1 GSa/s Oscilloscope module. Information is included about when to calibrate the module, the module warm up interval required prior to calibration, and how to do the actual calibration of the module. Also included are safety requirements to observe when working on the equipment, a list of recommended test equipment, and equipment setups for the different calibration procedures. Although the module has no hardware adjustments, it does contain a calibration PROTECT/UNPROTECT switch that you use before and after calibration. Actual calibration of the module is performed in software.

4-2. Safety Requirements

Read the safety summary at the front of this manual before any replacement, maintenance, or repair is performed.

Specific warnings, cautions, and instructions are placed wherever applicable throughout the manual. These must be observed during all phases of operation, service, and repair of the module. Failure to comply with them violates safety standards of design, manufacture, and intended use of this module. Hewlett-Packard assumes no liability for the failure of the customer to comply with these safety requirements.

4-3. Calibration Interval

To maintain proper calibration, perform calibration at approximately six-month intervals, or every 1000 hours, when the instrument is being used under normal operating conditions. Immediate calibration is required if one of the following occurs:

∙Oscilloscope module is installed, repaired, or replaced, or if the card slot configuration is changed.

SECTION IV

Calibration

∙The oscilloscope software changes revision number and asterisks (*) are on the calibra- tion menu.

∙Ambient temperature changes more than 10 °C.

If you add or delete a card(s) from a calibrated multicard oscilloscope module, you must perform the Time Null calibration.

4-4. Maintaining System Integrity

Calibration factors depend on the mainframe, module, and module configuration all staying together. If oscilloscope modules are interchanged between mainframes, or the oscilloscope module slot configuration is changed, calibration must be repeated. In an environment in which the possibility of sharing oscilloscope modules exists, Hewlett-Packard recommends taking the following precautions in order to maintain system integrity:

With the system turned off, place the PROTECT/UNPROTECT switch (all switches in a single or a chained, multiple oscilloscope module configuration) in the UNPROTECT position.

Boot the system and perform calibration for each module.

Turn off the system, place the PROTECT/UNPROTECT switch (all switches in a single or a chained, multiple oscilloscope module configuration) in the PROTECT position, then seal the mainframe.

4-5. Calibration Protection Switch

Each HP 16532A board stores the calibration factors for that board in non-volatile RAM on the board itself. The HP 16532A board contains a calibration protection (PROTECT/UNPROTECT) switch. With the switch in the PROTECT position, calibration values cannot be changed.

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Contents HP 16532A Safety Symbols Safety ConsiderationsContents Calibration ServiceSection Replaceable Parts List of Tables Page Table of Contents Page Introduction Safety RequirementsModule Covered by This Manual Accessories Available Accessories SuppliedSpecifications Operating CharacteristicsRise Time2 1.4 ns HP 16532A SpecificationsWaveform Record Length 8000 points Vertical dc Gain Accuracy4 ± 1.5% of full scaleVertical at BNC HP 16532A Operating CharacteristicsTimebase Digitizer TriggeringTrigger Level Range Trigger ModesDisplay Modes Waveform DisplayMeasurement Aids Operating Environment Setup AidsEquipment Critical Specifications Recommended Model USE Page Table of Contents Page Initial Inspection Safety Requirements Power RequirementsModule Installation Preparation for UseProcedure Installation ConsiderationsEndplate Overlap Bottom Sequence Operating Environment Tagging for ServiceStorage PackagingTable of Contents Page Test Record Performance Test ProceduresPerformance Test Interval DC CAL Output Test AC CAL Output Test Equipment Required Critical Specification Model/Part Number SpecificationInput 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 Interval Calibration Protection SwitchMaintaining System Integrity Calibration Instrument WarmupLocation of the PROTECT/UNPROTECT Switch Setting the PROTECT/UNPROTECT Switch to UnprotectEquipment Required for Calibration Loading the Default Calibration FactorsSelf Cal Menu Calibrations Calibrate Delay of the Self Cal menu as followsCalibrate 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 Abbreviations Replaceable Parts ListOrdering Information Exchange AssembliesDirect Mail Order System Reference Designator and Abbreviations Parts Identification HP Part Qty Number Reference DesignatorDescription Mfr Code Mfr Part NumberPage Table of Contents Page Module Block Diagram and The- ory of Operation Introduction Safety RequirementsMain Assembly Theory of Operation Attenuator 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 Data Memory Test Self-Test DescriptionsTimebase Test TestTroubleshooting Aids TroubleshootingVerifying the System Clock Page Troubleshooting Sheet Troubleshooting E E T1 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 ReplacementTrigger Cable Replacement Procedure Attenuator Removal and ReplacementAttenuator Removal Procedure Attenuator Replacement Procedure Certification WarrantyAssistance
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