Hewlett Packard 140B Oscilloscope
Manufacturer:
Model:
140B
Date:
1969
Category:
Group:
Description:

Information

The HP Model 140B is a general purpose Plug-In Oscilloscope. The deflection amplifiers are of the Plug-In type and the Oscilloscope contains only the Power supply, calibration, and CRT circuits. The Plug-In amplifiers operate directly into the CRT, therefore the Oscilloscope characteristics depend upon the plug-ins used. Presently available plug-ins make possible high sensitivity, wide bandwidth, and single, dual, or four trace measurements in combination with normal, single, or delayed sweeps. Double-sized plug-ins are also available for special applications such as time domain reflectometry, swept frequency indication, and spectrum analysis. 1-3. The Model 140B provides power for the plug-ins and line-frequency square wave calibrating voltages of 10 volts and 1 volt peak-to-peak which are available on the front panel. The primary power switch and all CRT controls are on the Model 140B front panel, and the terminals and switch for Z-axis modulation are on the rear panel. 1-4. CATHODE-RAY TUBE. 1-5. The Model 140B has an internal graticule CRT that eliminates parallax error when observing the display. The CRT is equipped with a nonglare safety face plate.

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Service and User Manual
Manual type:
Service and User Manual
Pages:
49
Size:
2.68 Mbytes (2805348 Bytes)
Language:
english
Revision:
Manual-ID:
00140-90909
Date:
01 February 1969
Quality:
Scanned document, reading partly badly, partly not readable.
Upload date:
31 December 2017
MD5:
1ff8738c919b5c8d6505804f5dc44ee6
Downloads:
396

Information

GENERAL INFORMATION ... 1-1 1-1. Description ... 1-1 1-4. Cathode-Ray Tube ... 1-1 1-7. Cathode-Ray Tube Warranty ... 1-1 1-9. Associated Equipment ... 1-1 1-12. Manual Identification ... 1-2 1-14. Scope of Manual ... 1-2 II INSTALLATION ... 2-1 2-1. Initial Inspection ... 2-1 2-4. Preparation for Use ... 2-1 2-5. Power Requirements ... 2-1 2-7. 230 Volt Operation ... 2-1 2-9. Three Conductor Power Cable ... 2-1 2-11. Cooling ... 2-1 2-12. Ventilation Requirements ... 2-1 2-14. Fan and Air Filter ... 2-1 2-16. Instrument Mounting ... 2-1 2-17. Modular Cabinet ... 2-1 2-19. Rack Mounting ... 2-1 2-21. Amber Fliter Installation ... 2-1 2-23. Claims and Repackaging ... 2-2 III OPERATING INSTRUCTIONS ... 3-1 3-1. Introduction ... 3-1 3-3. Controls and Indicators ... 3-1 3-4. Front Panel ... 3-1 3-9. Rear Panel ... 3-1 3-12. Plug-in Units ... 3-1 IV PRINCIPLES OF OPERATION ... 4-1 4-1. Over-all Functional Description 4-6. Circuit Description ... 4-1 4-7. Low-Voltage Supply ... 4-1 4-15. Calibrator ... 4-2 4-19. High-Voltage Supply ... 4-3 4-25. Trace Align ... 4-3 4-27. Plug-In Kit Fabrication ... 4-3 Section Title Page V PERFORMANCE CHECK AND ADJUSTMENTS ... 5-1 5-1. Introducation ... 5-1 5-3. Performance Check ... 5-1 5-4. CRT Controls ... 5-1 5-6. Adjustments ... 5-1 5-11. Adjustments of Low-Voltage Supplies ... 5-1 5-13. Adjustments of High-Voltage Supplies ... 5-2 5-14. Intensity Limit Adjustment ... 5-2 5-15. Astigmatism Adjustment ... 5-2 5-16. Geometry Adjustment ... 5-2 5-17. Calibrator Adjustment ... 5-3 VI REPLACEABLE PARTS ... 6-1 6-1. Introduction ... 6-1 6-4. Ordering I nformation ... 6-1 VII MANUAL CHANGES AND OPTIONS . . . 7-1/7-2 7-1. Manual Changes ... 7-1/7-2 7-3. Older Instruments ... 7-1/7-2 7-5. Newer Instruments ... 7-1/7-2 7-8. Options ... 7-1/7-2 7-10. Special Instruments ... 7-1/7-2 VIII SCHEMATICS AND TROUBLESHOOTING ..8-1 8-1. General ... 8-1 8-4. Troubleshooting ... 8-1 8-5. Low-Voltage Supplies ... 8-1 8-12. High-Voltage Supply ... 8-1 8-17. Periodic Maintenance ... 8-2 8-18. Electrical Maintenance ... 8-2 8-20. Mechanical Maintenance ... 8-2 8-23. Instrument Repair ... 8-2 8-26. Major Component Repair ... 8-3 8-30. Servicing Circuit Boards ... 8-3

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