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 chematic... i 8*23. Multivibrator, A3, Component Identification... i