ABOUT THIS MANUAL The SCPI Programming Manual for the CombiScope™ instruments describes how to program your CombiScope™ instrument via the IEEE bus using SCPI commands. 1.1 What this Manual Contains A complete table of contents is given at the beginning of the manual. Chapter 1 ABOUT THIS MANUAL Explains what the SCPI programming manual for the CombiScopes instruments contains. Chapter 2 GETTING STARTED WITH SCPI PROGRAMMING Tells you howto get started quickly with your CombiScope instrument. You can execute the program examples per (sub)section or from the beginning until the end. Chapter 3 USING THE COMBISCOPE INSTRUMENTS Explains how SCPI works for your CombiScope instrument from the functional point of view. Section 3.1 is an introduction and section 3.2 explains the fundamental programming concepts. The other sections and subsections represent the functional use of your CombiScope instrument. Chapter 4 COMMAND REFERENCE is a complete alphabetical reference of all implemented SCPI commands. In the beginning a command summary is given to provide you with a quick reference. Appendix A APPLICATION PROGRAM EXAMPLES Appendix A describes some application program examples. The application programs are supplied on floppy. Appendix B CROSS REFERENCES Appendix B gives cross references between SCPI commands and front panel keys, softkey menu options, and instrument functions. Appendix C MANUAL CONVENTIONS Appendix C explains which abbreviations and symbols are used in the manual, it also gives a list of the tables, figures, and documents referenced. Appendix D STANDARDS INFORMATION Appendix D gives information regarding SOP! and IEEE-488.2 standards. Appendix E SUMMARY OF SYSTEM SETTINGS Appendix E lists the system settings per functional group (node), plus the applicable instrument settings per node. A full alphabetical index is given at the end of the manual.

Reference Manual 1. CHARACTERISTICS.......................................1-1 1.1. VERTICAL.............................................1-3 1.1.2. Channeis...................................... -1-3 1.1.3. Bandwidth......................................1-3 1.1.4. Attenuator.......................................1-4 1.1.5. Input Characteristics..............................1-4 1.1.6. Coupling........................................1-5 1.1.7. Dynamic Range..................................1-5 1.1.8. Position Range...................................1-5 1.1.9. Trace Separation ................... ..............1-6 1.1.10. Input voltage limits................................1-6 1.1.11. Step Response...................................1-7 1.1.12. Signal Delay.............................................1-7 1.1.13. Vertical Accuracies............................... .1-7 1.2. TIMEBASE.............................................1-9 1.2.1. Timebase Modes.................................1-9 1.2.2. Timebase Settings (Analog Mode Only) ...............1-9 1.2.3. DTB Delay (Analog Mode Only}. ....................1-10 1.2.4. Timebase Settings (Digital Mode Only)...............1-10 1.2.5. Timebase Delay (Digital Mode Only)......................1-11 1.2.6. DTB Delay (Digital Mode Only).....................1-12 1.2.7. Analog Timebase Accuracies.......................1-12 1.2.8. Delaytime Accuracy (Analog Mode)..................1-12 12.9. DTB Jitter In Starts (Analog Mode).................. 1-13 1.2.10. Timebase Accuracies (Digital Mode).................1-13 1.2.11. DTB Jitter In Starts (Digital Mode)...................1-13 1.2.12. External Horizontal Deflection......................1-13 1.3. TRIGGERING............................................................1-14 1.3.1. Source........................................1-14 1.3.2. Modes ........................................1-14 1.3.3. TV Systems....................................1-14 1.3.4. Coupling.......................................1-15 1.3.5. Sensitivity......................................1-16 1.3.6. Slope.........................................1-17 1.3.7. Level..........................................1-17 1.3.8. Logic Triggering Timing (Digital Mode Only)...........1-17 1.3.9. Trigger Accuracies...............................1-18 1.4. EVENT COUNTER......................................1-19 1.5. HOLD-OFF............................................1-19 1.6. PROCESSING ... ......................................1-20 1.6.1. Preprocessing..................................1-20 1.6.2. Register Processing (Digital Mode)..................1-20 1.7. TRACE MEASUREMENTS (DIGITAL MODE)................1-21 1.8. CURSORS ............................................1-21 1.8.1. Cursor Control..................................1-21 1.8.2. Cursor Readouts................................1-22 1.8.3. Cursor Accuracies (Analog Mode)...................1-22 1.8.4. Cursor Accuracies (Digital Mode)....................1-22 1.9. DIGITAL ACQUISITION................................. .1-23 1.9.1. Modes........................................ .1-23 1.9.2. Sample Rate....................................1-23 1.9.3. Multiplexed channels.............................1-23 1.9.4. Trace Memory..................................1-24 1.9.5. Acquisition Time.................................1-24 1.9.6. Resolution.....................................1-25 1.9.7. Registers......................................1-25 1.9.8. Register Manipulations............................1-25 1.9.9. Digital Acquisition Accuracies .,....................1-26 1.9.10. External Clock..................................1-26 1.10. FRONT PANEL MEMORY ................................1-26 1.11. BLANKING OR Z-AXIS..................................1-26 1.12. DISPLAY .............................................1-27 1.12.1. CRT..........................................1-27 1.12.2. Modes.........................................1-28 1.12.3. Vertical Display Manipulations (Digital Mode)..........1-28 1.12.4. Horizontal Display Manipulations (Digital Mode) . .......1-28 1.13. EXTERNAL INTERFACES ...............................1-29 1.13.1. Calibrator......................................1-29 1.13.2. Standard External interfaces.......................1-29 1.13.3. Optional External interfaces........................1-31 1.14. AUTO SET & CALIBRATION.............................1-31 1.14.1. Autoset........................................1-31 1.14.2. Calibration................................... . .1-31 1.15. POWER SUPPLY AND BATTERY BACKUP.................1-32 1.15.1. Power supply...................................1-32 1.15.2. Battery Backup..................................1-33 1.16. MECHANICAL CHARACTERISTICS.......................1-33 1.17. ENVIRONMENTAL CHARACTERISTICS....................1-34 1.17.1. General.......................................1-34 1.17.2. Environmental..................................1-34 1.17.3. EM!...........................................1-36 1.18 SAFETY..............................................1-36 1.19.ACCESSORIES... .....................................1-37 1.20. OPTIONS & OPTIONAL VERSIONS ...................................1-37 1.20.1. Options Line cord................................1-37 1.20.2. Options digital versions...........................1-37 1.20.3. Options anaiog versions...........................1-37 1.20.4. Specification optional outputs......................1-38 1.20.5. Specification External trigger option..................1-38 1.20.6. Specification lEEE-option..........................1-40 1.20.7. Extended memory...............................1-41 2. PRINCIPLE OF OPERATION.....................................2-1 2.1. INTRODUCTION........................................2-1 2.2. CONTROL SECTION.....................................2-1 2.3. VERTICAL DEFLECTION.................................2-2 2.4. HORIZONTAL DEFLECTION..............................2-3 2.5. CRT DISPLAY SECTION................................. .2-5 2.6. POWER SUPPLY........................................2-6 2.7 DIGITIZER SECTION.....................................2-6 3. BRIEF CHECKING PROCEDURE........................3-1 3.1. GENERAL INFORMATION ................................3-1 3.2. PRELIMINARY SETTINGS OF THE CONTROLS ..............3-1 3.3. VERTICAL SECTION................................... .3-4 3.4. HORIZONTAL SECTION, MAIN AND DELAYED TIME BASE____.3-7 3.5. HORIZONTAL SECTION, X-DEFLECTION..................3-10 3.6. CURSORS ............................................3-10 3.7. TEXT OFF KEY........................................3-12 4. PERFORMANCE TEST.................................4-1 4.1. GENERAL INFORMATION................................4-1 4.2. RECOMMENDED TEST EQUIPMENT.......................4-2 4.3. TEST PROCEDURE .....................................4-4 4.3.1. Preliminary settings...............................4-4 4.3.2. Power supply....................................4-5 4.3.3. Auto set........................................4-6 4.3.4. Orthogonality....................................4-7 4.3.5. Trace distortion...................................4-8 4.3.6. Vertical deflection; deflection coefficients..............4-10 4.3.7. Vertical deflection; variable gain control range..........4-11 4.3.8. Vertical deflection; input coupling....................4-12 4.3.9. Vertical cursor accuracy...........................4-12 4.3.10. Vertical deflection; high-frequency response ...........4-13 4.3.11. Vertical deflection; iow-frequency response............4-14 4.3.12. Vertical deflection; dynamic range at 25/50 MHz........4-15 4.3.13. Vertical deflection; dynamic range at 100/200 MHz......4-16 4.3.14. Vertical deflection; position range....................4-16 4.3.15. Vertical deflection; crosstalk at 100/200 MHz...........4-17 4.3.16. Vertical deflection; common mode rejection ratio at 1 MHz.............. .....................4-19 4.3.17. Vertical deflection; common mode rejection ratio at 50 MHz..................................4-20 4.3.18. Vertical deflection; LF linearity......................4-21 4.3.19. Vertical deflection; visual signal delay................4-22 4.3.20. Vertical deflection; base line instability................4-23 4.3.21. Delay difference between vertical channels............4-24 4.3.22. Horizontal deflection; display modes and trace separation.................................4-27 4.3.23. Horizontal deflection; X deflection...................4-28 4.3.24. Horizontal deflection; MAIN TB deflection coefficients.............................4-30 4.3.25. Horizontal deflection; VARiable mode accuracy MAIN TB.......................................4-32 4.3.26. Time cursor accuracy........................... . .4-33 4.3.27. Horizontal deflection; DELAYED TIME BASE deflection coefficients.............................4-33 4.3.28. Horizontal deflection; delay time multiplier.............4-35 4.3.29. Horizontal deflection; delayed timbase jitter............4-36 4.3.30. Horizontal deflection; X deflection coefficient via CH1...............................4-37 4.3.31. Horizontal deflection; X deflection coefficient via iine . .. .4-38 4.3.32. Horizontal deflection; high frequency response . ........4-38 4.3.33. Maximum phase shift between horizontal and vertical deflection................................4-39 4.3.34. MAIN IB triggering PM3392A/3394A; trigger sensitivity................................4-41 4.3.35. MAiN TB triggering PM3382A/3384A; trigger sensitivity................................4-42 4.3.36. MAIN TB/DEL’D TB triggering; trigger sensitivity TVL-TVF.........................4-43 4.3.37. DEL’D TB triggering PM3392A/3394A; Trigger sensitivity............................... .4-44 4.3.38. DEL'D TB triggering PM3382A/3384A; trigger sensitivity................................4-46 4.3.39. Trigger sensitivity in logic mode Pm3392A/3394A.......4-48 4.3.40. Trigger sensitivity in logic mode PM3382A/3384A.......4-50 4.3.41. Z-MOD sensitivity...............,................4-51 4.3.42. CAL signal; frequency and output voltage.............4-52 4.3.43. Autorange functions..............................4-53 PREVENTIVE MAINTENANCE.......................... 5-1 5.1 GENERAL INFORMATION............................... .5-1 5.2 REMOVING THE BEZEL AND CONTRAST FILTER ............5-1 5.3 RECALIBRATION.......................................5-1

1.1 INTRODUCTION ........................................................1-1 1.2 SAFETY PRECAUTIONS..................................................1-1 1.3 CAUTION AND WARNING STATEMENTS....................................1-1 1.4 SYMBOLS .............................................................1-1 2 CHARACTERISTICS 21 2.1 VERTICAL .............................................................2-2 2.1.1 Channels.......................................................2-2 2.1.2 Deflection Modes (Analog Only).....................................2-2 2.1.3 Bandwidth ......................................................2-3 2.1.4 Attenuator ......................................................2-3 2.1.5 Input Characteristics..............................................2-4 2.1.6 Coupling .......................................................2-4 2.1.7 Dynamic Range..................................................2-4 2.1.8 Position Range ..................................................2-4 2.1.9 Trace Separation.................................................2-4 2.1.10 Input Voltage Limits...............................................2-5 2.1.11 Step Response ..................................................2-5 2.1.12 Signal Delay ....................................................2-6 2.1.13 Vertical Accuracies ...............................................2-6 2.2 TIMEBASE.............................................................2-7 2.2.1 Timebase (modes) ...............................................2-7 2.2.2 Timebase Settings (Analog Mode Only)...............................2-7 2.2.3 DTB Delay (Analog Mode Only) .....................................2-7 2.2.4 Timebase Settings (Digital Mode Only)................................2-8 2.2.5 Timebase Delay (Digital Mode Only)..................................2-9 2.2.6 DTB Delay (Digital Mode Only)......................................2-9 2.2.7 Analog Timebase Accuracies.......................................2-9 2.2.8 Delaytime Accuracy (Analog Mode) ..................................2-9 2.2.9 DTB Jitter In Starts (Analog Mode)..................................2-10 2.2.10 Timebase Accuraries (Digital Mode).................................2-10 2.2.11 DTB Jitter In Starts (Digital Mode)...................................2-10 2.2.12 External Horizontal Deflection......................................2-10 2.2.13 Horizontal Display Accuracy.......................................2-10 2.3 TRIGGERING..........................................................2-11 2.3.1 Source........................................................2-11 2.3.2 Modes........................................................2-11 2.3.3 TV Systems....................................................2-11 2.3.4 Coupling ......................................................2-11 2.3.5 Sensitivity .....................................................2-12 2.3.6 Slope.........................................................2-13 2.3.7 Level .........................................................2-13 2.3.8 Logic Triggering Timing (Digital Mode Only)...........................2-14 2.3.9 Trigger Accuracies ..............................................2-14 2.4 EVENT COUNTER......................................................2-15 2.5 HOLD-OFF............................................................2-15 2.6 PROCESSING .........................................................2-16 2.6.1 Preprocessing..................................................2-16 2.6.2 Register Processing (Digital Mode)..................................2-16 2.7 TRACE MEASUREMENTS (DIGITAL MODE).................................2-17 2.8 CURSORS............................................................2-17 2.8.1 Cursor Control..................................................2-17 2.8.2 Cursor Readouts................................................2-18 2.8.3 Cursor Accuracies ( Analog Mode)..................................2-18 2.8.4 Cursor Accuracies (Digital Mode)...................................2-18 2.9 DIGITAL ACQUISITION..................................................2-19 2.9.1 Modes........................................................2-19 2.9.2 Sample Rate...................................................2-19 2.9.3 Multiplexed Channels ............................................2-19 2.9.4 Trace Memory..................................................2-19 2.9.5 Acquisition Time ................................................2-20 2.9.6 Resolution.....................................................2-20 2.9.7 Registers......................................................2-21 2.9.8 Register Manipulations ...........................................2-21 2.9.9 Digital Acquisition Accuracies......................................2-21 2.10 FRONT PANEL MEMORY................................................2-21 2.11 BLANKING OR Z-AXIS (ONLY FOR ANALOG TRACE).........................2-22 2.12 DISPLAY .............................................................2-22 2.12.1 CRT..........................................................2-22 2.12.2 Modes........................................................2-22 2.12.3 Vertical Display Manipulations (Digital Mode)..........................2-23 2.12.4 Horizontal Display Manipulations (Digital Mode)........................2-23 2.13 EXTERNAL INTERFACES................................................2-24 2.13.1 Calibrator......................................................2-24 2.13.2 Standard external interface........................................2-24 2.13.3 Optional external interfaces........................................2-25 2.13.4 Printers and plotters support.......................................2-25 2.13.5 Real Time Clock ................................................2-26 2.14 AUTO SET & CALIBRATION..............................................2-26 2.14.1 Auto Set ......................................................2-26 2.14.2 Calibration.....................................................2-26 2.15 POWER SUPPLY AND BATTERY BACKUP..................................2-26 2.15.1 Power Supply ..................................................2-26 2.15.2 Battery Backup .................................................2-27 2.16 MECHANICAL CHARACTERISTICS........................................2-27 2.17 ENVIRONMENTAL CHARACTERISTICS....................................2-28 2.17.1 General.......................................................2-28 2.17.2 Environmental..................................................2-28 2.17.3 EMI ..........................................................2-29 2.18 SAFETY..............................................................2-30 2.19 ACCESSORIES........................................................2-30 2.20 OPTIONS & OPTIONAL VERSIONS........................................2-30 2.20.1 Options Line cord ...............................................2-30 2.20.2 Options digital versions...........................................2-30 2.20.3 Options analog .................................................2-31 2.20.4 Specification optional outputs......................................2-31 2.20.5 Specification External trigger option .................................2-31 2.20.6 Specification IEEE-OPTION .......................................2-32 2.20.7 Extended memory...............................................2-33 3 DESCRIPTIONS 35 3.1 GENERAL DESCRIPTION.................................................3-5 3.1.1 Introduction to oscilloscope family....................................3-5 3.1.2 Introduction to descriptions.........................................3-5 3.1.3 Explanation of signal names........................................3-6 3.1.4 Voltage values in the circuit diagrams.................................3-6 3.2 BLOCK DIAGRAM DESCRIPTION ..........................................3-7 3.2.1 Introduction.....................................................3-7 3.2.2 Vertical channels.................................................3-8 3.2.3 Triggering and time bases..........................................3-9 3.2.4 Final amplifiers .................................................3-10 3.2.5 Front unit and microprocessor......................................3-11 3.2.6 Power supply...................................................3-11 3.2.7 Digitizer.......................................................3-12 4 PARTS ......................................................................4-1 4.1 UNITS.................................................................4-1 4.2 INTERCONNECTION CABLES.............................................4-2 4.3 MECHANICAL PARTS....................................................4-4 5 UNIT DESCRIPTIONS.................................................... 5.1-1 5.1 SIGNAL UNIT A1 ...................................................... 5.1-1 5.1.1 Description A1................................................. 5.1-1 5.1.2 Signal name list............................................... 5.1-14 5.1.3 Unit lay-outs ................................................. 5.1-21 5.1.4 Location list Signal Unit A1 ...................................... 5.1-25 5.1.5 Circuit diagrams .............................................. 5.1-35 5.1.6 Parts list .................................................... 5.1-61 5.2 FINAL XYZ AMPLIFIER A2 .............................................. 5.2-1 5.2.1 Description of A2-200 MHz version................................. 5.2-1 5.2.2 Signal name list A2-200 MHz version............................... 5.2-5 5.2.3 Unit lay-outs A2-200 MHz version.................................. 5.2-7 5.2.4 Location list A2-200 MHz version .................................. 5.2-9 5.2.5 Circuit diagramsA2-200 MHz version .............................. 5.2-13 5.2.6 Parts list A2-200 MHz version.................................... 5.2-19 5.2.7 Description of A2-100 MHz version................................ 5.2-35 5.2.8 Signal name list A2-100 MHz version.............................. 5.2-39 5.2.9 Unit lay-outs A2-100 MHz version................................. 5.2-41 5.2.10 Location List A2-100 MHz version................................. 5.2-43 5.2.11 Circuit diagrams A2-100 MHz version.............................. 5.2-47 5.2.12 Parts list A2-100 MHz version.................................... 5.2-53 5.3 MICROPROCESSOR A3................................................................................................5.3-1 5.3.1 Description A3..................................................................................................5.3-1 5.3.2 Signal name list A3..........................................................................................5.3-2 5.3.3 Location list......................................................................................................5.3-4 5.3.4 Unit lay-outs ....................................................................................................5.3-5 5.3.5 Circuit diagrams ..............................................................................................5.3-7 5.3.6 Parts list ........................................................................................................5.3-13 5.4 FRONT UNIT A4 ...................................................... 5.4-1 5.4.1 Description ......................................................................................................5.4-1 5.4.2 Signal name list A4..........................................................................................5.4-1 5.4.3 Key switches....................................................................................................5.4-2 5.4.4 Unit lay-outs ....................................................................................................5.4-5 5.4.5 Circuit diagrams ..............................................................................................5.4-7 5.4.6 Parts list ..........................................................................................................5.4-9 5.5 CRT CONTROLS UNIT A5 .............................................. 5.5-1 5.5.1 Description ......................................................................................................5.5-1 5.5.2 Unit Lay-outs....................................................................................................5.5-2 5.5.3 Circiuit diagram................................................................................................5.5-3 5.5.4 Parts list ..........................................................................................................5.5-4 5.6 POWER SUPPLY A6................................................... 5.6-1 5.6.1 Description A6................................................. 5.6-1 5.6.2 Signal name list A6............................................. 5.6-5 5.6.3 Unit lay-outs .................................................. 5.6-7 5.6.4 Circuit diagram ................................................ 5.6-9 5.6.5 Parts list .................................................... 5.6-13 5.7 RESERVED FOR FUTURE EXTENSIONS.................................. 5.7-1 5.8 DIGITIZER A8 ........................................................ 5.8-1 5.8.1 Descriptions .................................................. 5.8-1 5.8.2 Signal name list digitizer A8 ..................................... 5.8-23 5.8.3 Unit lay-outs ................................................. 5.8-29 5.8.4 Location list.................................................. 5.8-31 5.8.5 Circuit diagrams .............................................. 5.8-37 5.8.6 Parst list .................................................... 5.8-55 5.9 RESERVED FOR FUTURE EXTENSIONS.................................. 5.9-1 5.10 CONNECTOR BOARD A10............................................. 5.10-1 5.10.1 Unit lay-out .................................................. 5.10-1 5.10.2 Circuit diagram ............................................... 5.10-3 5.10.3 Parts list .................................................... 5.10-5 5.11 FACTORY INSTALLED OPTIONS................................................................................5.11-1 5.11.1 IEEE-OPTION................................................................................................5.11-1 5.11.2 AUXILIARY OUTPUTS OPTION....................................................................5.11-1 5.11.3 EXTERNAL TRIGGER OPTION....................................................................5.11-7 6 PERFORMANCE TEST....................................................6 1 6.1 GENERAL INFORMATION ................................................6-1 6.2 RECOMMENDED TEST EQUIPMENT .......................................6-2 6.3 TEST PROCEDURE .....................................................6-3 6.3.1 Preliminary settings...............................................6-3 6.3.2 Power supply....................................................6-3 6.3.3 Auto set........................................................6-4 6.3.4 Orthogonality....................................................6-5 6.3.5 Trace distortion ..................................................6-6 6.3.6 Vertical deflection; deflection coefficients..............................6-6 6.3.7 Vertical deflection; variable gain control range (continuation of 4.3.6) ........6-8 6.3.8 Vertical deflection; input coupling (continuation of 4.3.7) ..................6-8 6.3.9 Vertical cursor accuracy (continuation of 4.3.8.).........................6-9 6.3.10 Vertical deflection; high-frequency response ...........................6-9 6.3.11 Vertical deflection; low-frequency response ...........................6-10 6.3.12 Vertical deflection; dynamic range at 15/25/50 MHz.....................6-11 6.3.13 Vertical deflection; dynamic range at 60/100/200 MHz (continuation of 4.3.12) 6-11 6.3.14 Vertical deflection; position range...................................6-12 6.3.15 Vertical deflection; crosstalk between channels at 60/100/200 MHz ........6-12 6.3.16 Vertical deflection; common mode rejection ratio at 1 MHz ...............6-13 6.3.17 Vertical deflection; common mode rejection ratio at 50 MHz (continuation of 4.3.16)...........................................6-14 6.3.18 Vertical deflection; LF linearity .....................................6-15 6.3.19 Vertical deflection; visual signal delay................................6-15 6.3.20 Vertical deflection; base line instability...............................6-17 6.3.21 Delay difference between vertical channels ...........................6-17 6.3.22 Horizontal deflection; display modes and trace separation................6-19 6.3.23 Horizontal deflection; X deflection...................................6-20 6.3.24 Horizontal deflection; MAIN TB deflection coefficients ...................6-21 6.3.25 Horizontal deflection; VARiable mode accuracy MAIN TB.................6-22 6.3.26 Time cursor accuracy (continuation of 4.3.25) .........................6-23 6.3.27 Horizontal deflection; DELAYED TIME BASE deflection coefficients........6-24 6.3.28 Horizontal deflection; delay time multiplier ............................6-25 6.3.29 Horizontal deflection; delayed timebase jitter ..........................6-26 6.3.30 Horizontal deflection; X deflection coefficient via CH1 ...................6-26 6.3.31 Horizontal deflection; X deflection coefficient via ’line’ ...................6-27 6.3.32 Horizontal deflection; high frequency response ........................6-28 6.3.33 Maximum phase shift between horizontal and vertical deflection...........6-28 6.3.34 MAIN TB triggering PM3390A/3392A/3394A; trigger sensitivity via CH1, CH2, CH3 and CH4 (EXT) ...................6-30 6.3.35 MAIN TB triggering PM3370A/3380A/3382A/3384A; trigger sensitivity via CH1, CH2, CH3 and CH4 (EXT)....................6-31 6.3.36 MAIN TB/DEL’D TB triggering; trigger sensitivity TVL-TVF ...............6-32 6.3.37 DEL’D TB triggering PM3390A/92A/94A; trigger sensitivity via CH1, CH2, CH3 and CH4 (EXT) ...................6-32 6.3.38 DEL’D TB triggering PM3370A/80A/82A/84A; trigger sensitivity via CH1, CH2, CH3 and CH4 (EXT)....................6-34 6.3.39 Trigger sensitivity in logic mode PM3392A/3394A ......................6-35 6.3.40 Trigger sensitivity in logic mode PM3382A/3384A ......................6-36 6.3.41 Z-MOD sensitivity ...............................................6-37 6.3.42 Probe Adjust signal; frequency and output voltage......................6-38 6.3.43 Auto range functions.............................................6-39 7 CALIBRATION ADJUSTMENT PROCEDURE...........................7-1 7.1 INTRODUCTION ........................................................7-1 7.2 DARK LEVEL OF CRT....................................................7-1 7.3 TRACE ROTATION.......................................................7-2 7.4 HORIZONTAL (X) GAIN AND OFFSET (CRT)..................................7-2 7.5 TEXT STABILITY AND X-OFFSET (CRT).....................................7-2 7.6 VERTICAL (Y) GAIN AND OFFSET (CRT).....................................7-2 7.7 HORIZONTAL GAIN AND OFFSET (VECTOR).................................7-3 7.8 VERTICAL GAIN AND OFFSET (VECTOR) ...................................7-3 7.9 ASTIGMATISM..........................................................7-3 7.10 AUTOCAL PROCEDURE..................................................7-3 7.11 LF SQUARE-WAVE RESPONSE CH1........................................7-4 7.12 LF SQUARE-WAVE RESPONSE CH2 .......................................7-5 7.13 LF SQUARE-WAVE RESPONSE CH3 .......................................7-5 7.14 LF SQUARE-WAVE RESPONSE CH4 and EXT TRIG ...........................7-6 7.15 HF SQUARE-WAVE RESPONSE FINAL Y AMPLIFIER..........................7-7 7.16 HF RESPONSE DSO MODE...............................................7-8 7.17 TRIGGER DELAY ADJUSTMENT...........................................7-9 7.18 SAVING THE CALIBRATION DATA.........................................7-10 7.19 TESTING THE INSTRUMENT’S PERFORMANCE.............................7-10 8 CORRECTIVE MAINTENANCE PROCEDURES 8 1 8.1 DISMANTLING THE INSTRUMENT .........................................8-1 8.1.1 General information...............................................8-1 8.1.2 Removing the cabinet and carrying handle.............................8-1 8.2 REPLACEMENTS .......................................................8-1 8.2.1 Standard parts...................................................8-2 8.2.2 Special parts....................................................8-2 8.2.3 Transistors and Integrated Circuits...................................8-2 8.3 STATIC SENSITIVE COMPONENTS ........................................8-2 8.4 SOLDERING TECHNIQUES ...............................................8-3 8.4.1 General soldering techniques.......................................8-3 8.4.2 Soldering micro-miniature semi-conductors ............................8-3 8.5 REMOVING THE UNITS, MECHANICAL PARTS AND CRT ......................8-4 8.5.1 Removing the rotary knobs.........................................8-4 8.5.2 Detachment of ribbon cables........................................8-4 8.5.3 Removal of signal unit A1 ..........................................8-5 8.5.4 Removal of Final XYZ amplifier unit A2................................8-6 8.5.5 Removal of unit at socket of CRT....................................8-7 8.5.6 Removal of Cathode Ray Tube (CRT) ................................8-7 8.5.7 Removal of microprocessor unit A3 ..................................8-7 8.5.8 Removal of the units in the front frame (A4, A5).........................8-8 8.5.9 Removal of the Power supply unit A6.................................8-8 8.5.10 Removal of digitizer unit A8.........................................8-9 8.6 INSTRUMENT REPACKING ...............................................8-9 8.7 TROUBLESHOOTING TECHNIQUES........................................8-9 8.8 TROUBLESHOOTING THE POWER SUPPLY................................8-10 8.9 SPECIAL TOOLS.......................................................8-11 8.9.1 Extension board ................................................8-11 8.9.2 Flash-ROM loader program........................................8-11 8.10 RECALIBRATION AFTER REPAIR.........................................8-11 8.11 TESTS BUILT INTO THE INSTRUMENT.....................................8-12 8.11.1 Power-up test...................................................8-12 8.11.2 Introduction to diagnostic tests......................................8-12 8.11.3 SELFTESTS....................................................8-15 8.11.4 Repair tools....................................................8-17 9 SAFETY INSPECTION AND TESTS AFTER REPAIR AND MAINTENANCE IN THE PRIMARY CIRCUIT.............................9-1 9.1 GENERAL DIRECTIONS..................................................9-1 9.2 SAFETY COMPONENTS..................................................9-1 9.3 CHECKING PROTECTIVE GROUND........................................9-1 9.4 CHECKING INSULATION RESISTANCE .....................................9-1 9.5 CHECKING LEAKAGE CURRENT ..........................................9-1 9.6 VOLTAGE TEST ........................................................9-1