LIST OF ILLUSTRATIONS...iv LIST OF TABLES...v OPERATORS SAFETY SUMMARY...vi SERVICING SAFETY SUMMARY...vii SECTION 1 SPECIFICATION INTRODUCTION... 1-1 Accessories 1-1 PERFORMANCE CONDITIONS ... 1-1 SECTION 2 OPERATING INSTRUCTIONS PREPARATION FOR USE...2-1 SAFETY...2-1 LINE VOLTAGE...2-1 POWER CORD...2-1 LINE FUSE...2-1 CONTROLS, CONNECTORS, AND INDICATORS...2-3 POWER, DISPLAY, AND Probe ADJUST...2-3 VERTICAL...2-3 HORIZONTAL...2-5 TRIGGER...2-5 REAR PANEL...2-7 OPERATING CONSIDERATIONS. ... 2-8 GRATICULE...2-8 GROUNDING...2-8 SIGNAL CONNECTIONS...2-8 INPUT COUPLING CAPACITOR PRECHARGING...2-8 INSTRUMENT COOLING...2-9 Oscilloscope DISPLAYS...2-9 INTRODUCTION...2-9 BASELINE TRACE...2-9 SIGNAL DISPLAY...2-9 MAGNIFIED-SWEEP DISPLAY____2-10 DELAYED-SWEEP DISPLAY...2-10 X-Y DISPLAY...2-10 TV SIGNAL DISPLAYS... 2-11 Page SECTION 3 THEORY OF OPERATION INTRODUCTION...3-1 GENERAL DESCRIPTION...3-2 DETAILED CIRCUIT DESCRIPTION...3-4 VERTICAL ATTENUATORS...3-4 Input Coupling...3-4 High-Z Attenuator...3-4 Buffer Amplifier and Low-Z Attenuator...3-5 Volts/Div Var Circuit and X1/X10 Amplifier 3-6 VERTICAL PREAMPS...3-6 Channel 1 Vertical Preamplifier . . 3-6 Channel 2 Vertical Preamplifier . . 3-6 Internal Trigger Pickoff Amplifier 3-7 CHANNEL SWITCH AND VERTICAL OUTPUT...3-7 Diode Gates Radio Company 3-7 Delay Line Driver...3-8 Delay Line...3-9 Vertical Output Amplifier 3-9 Channel Switching Logic Circuit...3-9 Internal Trigger Switching Logic...3-10 TRIGGER...3-12 Internal Trigger Amplifier 3-13 Trigger Source-Switching Circuit...3-13 External Trigger Amplifier 3-13 Auto Trigger Circuit...3-13 Trigger Level Comparator...3-14 Inverting Amplifier and TV Trigger Ci rcu it...3-14 Schmitt Trigger Circuit...3-15 Auto Baseline Circuit...3-15 SWEEP Generator AND LOGIC...3-15 J. W. Miller Sweep Generator 3-15 Sweep Logic...3-16 Delay Circuit...3-18 SECTION 3 THEORY OF OPERATION (cont) DETAILED CIRCUIT DESCRIPTION (cont) AUTO INTENSITY AND Z-AXIS Amplifier 3-19 Auto Intensity...3-19 Z-Axis Amplifier 3-20 HORIZONTAL...3-20 Horizontal Preamplifier...3-20 XY Amplifier 3-21 Horizontal Output Amplifier 3-22 Power Supply 3-22 Power Input...3-22 Preregulator...3-22 Inverter...3-23 CRT Supply...3-24 Auto Focus Circuit...3-24 Low-Voltage Supplies...3-24 DC Restorer...3-24 SECTION 4 PERFORMANCE CHECK PROCEDURE INTRODUCTION...4-1 PURPOSE...4-1 TEST EQUIPMENT REQUIRED .. . 4-1 LIMITS AND TOLERANCES...4-1 PREPARATION...4-1 INDEX TO PERFORMANCE CHECK STEPS...4-3 VERTICAL...4-4 HORIZONTAL...4-6 TRIGGERING...4-9 EXTERNAL Z-AXIS AND Probe ADJUST...4-12 SECTION 5 ADJUSTMENT PROCEDURE INTRODUCTION...5-1 PURPOSE...5-1 TEST EQUIPMENT REQUIRED ... 5-1 LIMITS AND TOLERANCES...5-1 PARTIAL PROCEDURES...5-1 ADJUSTMENT INTERACTION ... 5-1 PREPARATION FOR ADJUSTMENT...5-3 INDEX TO ADJUSTMENT PROCEDURE...5-3 Power Supply AND CRT DISPLAY...5-4 VERTICAL...5-7 HORIZONTAL...5-13 TRIGGERING...5-17 EXTERNAL Z-AXIS AND Probe ADJUST...5-20 SECTION 6 MAINTENANCE STATIC-SENSITIVE COMPONENTS . . 6-1 PREVENTIVE MAINTENANCE...6-2 INTRODUCTION...6-2 GENERAL CARE...6-2 INSPECTION AND CLEANING ... 6-2 LUBRICATION...6-4 SEMICONDUCTOR CHECKS...6-4 PERIODIC READJUSTMENT...6-4 TROUBLESHOOTING...6-5 INTRODUCTION...6-5 TROUBLESHOOTING AIDS...6-5 TROUBLESHOOTING EQUIPMENT...6-7 TROUBLESHOOTING TECHNIQUES...6-7 CORRECTIVE MAINTENANCE...6-10 INTRODUCTION...6-10 MAINTENANCE PRECAUTIONS . . 6-10 OBTAINING REPLACEMENT PARTS...6-10 MAINTENANCE AIDS...6-10 SECTION 6 MAINTENANCE (cont) INTERCONNECTIONS...6-10 TRANSISTORSAND INTEGRATED CIRCUITS...6-11 SOLDERING TECHNIQUES...6-12 REMOVAL AND REPLACEMENT INSTRUCTIONS...6-13 Cabinet...6-13 Cathode-Ray Tube...6-13 High-Voltage Shield...6-14 Attenuator/Sweep Circuit Board...6-14 Front-Panel Circuit Board...6-15 Main Circuit Board...6-16 Current Limit Circuit Board ... 6-18 REPACKAGING FOR SHIPMENT. . 6-18 SECTION 7 OPTIONS SECTION 8 REPLACEABLE ELECTRICAL PARTS SECTION 9 DIAGRAMS SECTION 10 REPLACEABLE MECHANICAL PARTS Accessories INTERNATIONAL SALES 8c SERVICE OFFICES U.S. SALES & SERVICE OFFICES CHANGE INFORMATION