Table Of Contents - HP 428B Operating And Service Manual

Model 428B
GENERAL INFORMATION
1-1. INTRODUCTION
1-7. INSTRUMENT AND MANUAL IDENTIFICATION.
INSTALLATION
2-1. UNPACKING AND MECHANICAL INSPECTION.
2-4. OPERATION CHECK.
2-6. INSTALLATION.
2-8. POWER REQUIREMENTS.
2-10. OPERATION ON 115 OR 230 VOLTS.
2-13. THREE CONDUCTOR POWER CABLE.
2-15. RACK MOUNT MODEL.
2-17. PREPARATION FOR STORAGE AND SHIPMENT.
2·20. STORAGE.
OPERATING INSTRUCTIONS
3-1. INTRODUCTION.
3-3 OPERATING PRECAUTIONS.
3-4. OPERATING CONSIDERATIONS.
3-5. INTERCHANGING PROBE HEADS.
3-7. EFFECT OF MEASUREMENT ON CIRCUIT.
3-12. EFFECT OF CIRCUIT ON MEASUREMENT. 5
3-19. Magnetic Fields.
3-26. OPERATING PRACTICES.
3-27. MECHANICAL OPERATION OF PROBE.
3-29. DEGAUSSING OF PROBE HEAD.
3-33. ELECTRICAL ZERO SET.
3-37. POLARITY OF CURRENT.
3-39. INCREASING THE ABSOLUTE SENSITIVITY 7
3-41. CURRENT CHECK LOOPS.
3-44. NULLING CURRENTS.
3-46. USE OF OUTPUT JACK.
3-48. With Oscilloscope.
3-50. With Recorder.
THEORY OF OPERATION
4-1. INTRODUCTION.
4-3. THEORY OF OPERATION.
4-9. CURRENT PROBE.
4-19. 20 kHz OSCILLATOR.
4-23. HEAD-DRIVE AMPLIFIER.
4-25. DETECTOR GATE AMPLIFIER.
4-28. 40 kHz INPUT/AMPLIFIER CIRCUIT.
4-30. SYNCHRONOUS DETECTOR AND FILTER (C24).
4-36. DC AMPLIFIER.
4-43. NEGATIVE FEEDBACK CURRENT CIRCUIT. 12
4-45. 40 kHz PHASE SHIFTER.
4-48. POWER SUPPLY.

TABLE OF CONTENTS

2 MAINTENANCE
2 5-1. INTRODUCTION.
5-3. TEST EQUIPMENT REQUIRED.
2 5-5. IN-CABINET PERFORMANCE CHECKS.
3 5-7. CLEANING OF PROBE JAWS.
5-10. ELECTRICAL ZERO SET.
3 5-13. RANGE CHECK.
3 5-15. METER TRACKING.
3 5-17. OUTPUT CALIBRATION.
3 5-19. FREQUENCY RESPONSE.
3 5-21. AC OVERLOAD.
3 5-23. NOISE CHECK.
3 5-25. ADJUSTMENT PROCEDURE.
5-27. POWER SUPPLY.
3 5-29. MECHANICAL ZERO SET.
3 5-31. DC AMPLIFIER BALANCE.
5 5-34. ALIGNMENT.
5 5-35. OSCILLATOR BALANCE.
5 5-37. OSCILLATOR FREQUENCY.
5 5-39. OSCILLATOR LEVEL.
5 5-41. DETECTOR GATE.
5 5-43. TUNED AMPLIFIER.
5-44. Equipment Setup.
6 5-46. Input Alignment.
6 5-48. Interstage Alignment.
6 5-50. DETECTOR PHASE ADJUSTMENT.
6 5-53. Preliminary Adjustment.
6 5-54. Preset the controls as follows:
6 5-55. Drive Balance Adjustment.
5-59. TROUBLESHOOTING.
7 5-60. FRONT PANEL TROUBLESHOOTING.
7 5-63. DETAILED TROUBLESHOOTING.
7 5-64. Probe Check.
7 5-66. Power Supply Check.
7 5-71. Oscillator - Buffer Amp. Check.
9 5-80. Synchronous Detector.
9 REPLACEABLE PARTS
9 6-1. INTRODUCTION.
9 6-4. ORDERING INFORMATION.
11 6-6. NON-LISTED PARTS.
11 CIRCUIT DIAGRAMS
11 7-1. INTRODUCTION.
11 7-3. BLOCK DIAGRAM.
7-5. SCHEMATIC DIAGRAMS.
11 7-7. COMPONENT LOCATION DIAGRAMS.
12 MANUAL BACKDATING CHANGES
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