C.ENKRAL INFORMATION I-lJ Introduction...................... 1-3. Instrument Description ........... 1-5. General..........* — *......... 1-8, Vertical Circuits................ 1-13, Horizontal Circuits.............. 1-19, 1 Options,.......................... 1-21. Instruments Covered by Manual .. II INSTALLATION.......................... 2-1. Introduction...................... 2-3. Initial Inspection................. 2-5. Powpr Cords and Receptacles..... 2-7. Power Requirements .............. 2-10. Repacking for Shipment .......... III OPERATION............................. 3*1. Introduction ...................... 3*3. Controls and Connectors . 3-23. Operating Instructions............ 3-25. Applying Input Signals......... 3-27. Trigger Signal Requirements — 3-30. Operating Procedures........... IV PRINCIPLES OF OPERATION........... <1-1. Introduction ........... I.......... 4-3. General Theory................... 4-7. Vertical Preamplifier Modules... 4-13. Horizontal Module.............. 4-25. Output Module.................. 4*34. Power Supply Modules.......... 4-37. Detailed Circuit Theory ........... 4-39. Vertical Preamplifier Modules... 4-53. Horizontal Module.............. 4-94. Output Module.................. 4-113. Power Supply Modules......... V PERFORMANCE CHECK AND ADJUSTMENTS........................ 5-1. Introduction...................... 5-3. Test Equipment................... 5-5. Performance Check and Adjustments.................... 5-9. Preliminary Control Settings____ 5-10. Preliminary Checks............. 5-12. Intensity........................ 5-13. Focus........................... 5-14. Trace Align..................... 5-15. Amplifier Balance.............. 5-16. Vertical Positioning............. 5-17. Beam Finder.................... 5-18. Performance Check Procedure..... 5-19. Vertical Amplifier Gain......... 5-20. Calibrator...................... 5-21. Vertical Bandwidth............. 5-22. Noise........................... 5-23. Common Mode Rejection Ratio .. 5-24. A vs B Phase Shift.............. 5-25. Channel Isolation............... 5*26. Trigger Amplitude.............. 5-27. Trigger Point and Slope......... 5-28. Sweep Time..................... 5-29. Sweep Vernier .................. 5-30. Magnified Sweep................ 5-31. Single Sweep................... 5-32. Horizontal Amplifier Gain...... 5*33. Horizontal Vernier.............. 5-34. Horizontal Bandwidth.......... 5*35. Adjustment Procedure............. 5-39. Preliminary Setup.............. 5-41. Low Voltage Power Supply...... 5-42. High Voltage Power Supply..... 5-43. Astigmatism.................... 5-44. Intensity Limit ................. 5-45. Horizontal Gain ................ 5-46. Horizontal Vernier Balance..... 5*47. Horizontal Attenuator Compensation............... 5-48. Auto Triggering................ 5-49. Horizontal Positions Centering..................... 5-5Ö. Magnifier Centering........... 5-51. Sweep Time Calibration........ 5-52. Vertical Vernier and Vertical Amplifier Balance........... 5-53. Output Amplifier Gain......... 5-54. Input Capacitance and Attenuator Compensation____ 5-55. CMRR Balance................ rI REPLACEABLE PARTS............1..... 6-1. Introduction...................... 6-3. Ordering Information............. 6-6. Direct Mail Order System......... II MANUAL CHANGES.................... ! 7*1. Introductions..................... 7-3. Manual Changes.................. 7-5. Option 006........................ III SCHEMATICS AND TROUBLESHOOTING................. 8-1. Introduction........ 8-3. , Schematics ......... 8-10. Component Location 8*13. Troubleshooting.................. 8-in. Fro nt-pa net Controls............ 8-17. Per forma net: Cheek............. 8-19. Troubleshooting Table.......... 8-26. Visual Chec’s.................. 8-28. Waveforms and Voltages........ 8-33. Final Cheeks ................... 8-35. Repair and Replacement.......... 8-37. Servicing Etched Circuit lizards. LIST C Figure Title ] 2-1. Model 1200A Power Cable Configurations...................... 2*2. Model 12Ü0B Power Cable Configurations •...................... 3*1. Controls and Connectors ..............„ .7-2. Bandwidth Upper Limit vs Selected Capacitance......................... 4-1. Channel A Attenuator and Preamplifier Block Diagram....................... •1-2. Horizontal Preamplifier Block Diagram......................... — •1-3. Trigger Generator and Horizontal Amplifier Block Diagram............ 4-I. Sweep Generator Block Diagram....... 4*5. Multivibrator Block Diagram.......... •1-6. Output Amplifier Block Diagram...... •1-7. Regulated Power Supply Block Diagram..............,............. •1-8. I,ow Voltage Power Supply Block Diagram........................ — 4-9. High Voltage Power Supply Block Diagram............................ 4-10. Overall Block Diagram................ 5-1. , Low Voltage Power Supply Adjustment.......................... 5-2* High Voltage Power Supply Adjustments............. ........... 5-3. Horizontal Module Adjustments....... 5-1. Vertical Preamplifier Module Adjustments........................ 5-5. Dual Channel Output Amplifier Adjustments........................ 7-1. TI Primary Circuits.................... 7-2. I,ow Voltage Power Supply, A5, Component Identification............ 7*3. High Voltage Regulator, A6, Component Identification............ 7*4. Option 006, Schematic Connection ..... 8-39. Semiconductor Replacement..... 8-12. CRT Removal and Replacement.................. 8-45. Vertical Preamplifier Module Removal and Replacement .... 8-48. Horizontal Module Removal and Replacement............. 8-51. Dual Channel Output Board Removal and Replacement — 5TRATIONS Figure Title I 8-1. Semiconductor Identification . ......... 8-2. Model I200B Bottom View............. 8-3. Model 1200A Top View................. 8-4. Model 1200A Bottom View —....... 8-5. Model 1200A Exploded View ....... 8-6. Model 1200B Exploded View........... 8-7. 100 j^V Preamplifier Module, Al, Component Identification........... 8-8. Volts/Division Switch, A1A2, Componei.t Identification........... 8-9. Vertical Preamplifier, AlAl, Component Identification........... 8*10. Channel A Attenuator and Preamplifier Block Diagram...................... 8-11. Channel A Preamplifier Module Measurement Conditions and Waveforms ......................... 8-l*>. Channel A Preamplifier Modulo Schematic.......................... 8-13. 100 ^V Preamplifier Module,1 A2, Component Identification........... 8*14. Volts/Division Switch, A2A2, Component Identification........... 8-15. Vertical Preamplifier, A2A 1, Component Identification........... 8-16. Channel B Attenuator and Preamplifier Block Diagram...................... 8-17. Channel B Preamplifier Module Measurement Conditions and Waveforms ......................... 8*18. Channel B Preamplifier Module Schematic .......................... 8*19. Dual Channel Output Amplifier, A3, Component Identification........... 8-20. Dual Channel Output Amplifier Block Diagram...................... 8-21. I)uj1 Channel Output Amplifier Waveforms......................... 8*22. Dual Channel Output Amplifier Schematic.......................... i 8*23. Multivibrator, A3, Component Identification....................... i