HP-141A-Manual 电路图.pdf

《HP-141A-Manual 电路图.pdf》由会员分享，可在线阅读，更多相关《HP-141A-Manual 电路图.pdf（54页珍藏版）》请在收音机爱好者资料库上搜索。

1、I . : HP Archive . . This vintage Hewlett Packard document was preserved and distributed by www. Please visit us on the web ! . . On-line curator: Tony Gerbic RadioFans.CN 收音机爱 好者资料库 , I 1 I 1 I 1 I 1 l I O P E R A T I N G A N D S E R V I C E M A N U A L MODEL 141A OSCILLOSCOPE SERIALS PREFIXED: 547

2、- Copyright HEWLETT-PACKARD COMPANV/COLORADO SPRINGS DIVISION 1965 I900 GARDEN OF THE GODS ROAD. COLORADO SPRINGS, COLORADO, U S A 02567-1 PRINTED: DEC 1965 RadioFans.CN 收音机爱 好者资料库 Table of Contents TABLE OF CONTENTS Section Page I GENERAL INFORMATION . . . . . . . . . 1-1 1-1. Description . . . . .

3、 . . . . . . . . . 1- 1 1-6. Cathode Ray Tube . . . . . . . . . . 1-1 1-8. CRT Warranty . . . . . . . . . . . . 1-1 1-10. AssociatedEquipment . . . . . . . . 1-1 1-12. Manual Identification . . . . . . . . 1-2 1-14. Scope of Manual . . . . . . . . . . . 1-2 I1 INSTALLATION . . . . . . . . . . . . .

4、. * 2-1 2-1. Initialhspection . . . . . . . . . . . 2-1 2-4. Preparation for Use . . . . . . . . . 2-1 2-5. Power Requirements . . . . . . 2-1 2-9. Instrument Mounting . . . . . . . 2-1 2-12. Instrument Cooling . . . . . . . 2-1 2-15. Claims . . . . . . . . . . . . . . 1 . 2-1 2-17. Repackagingfor S

5、hipment . . . . . . 2-2 1 1 1 OPERATION . 3-1 3-1. Introduction. . . . . . . . . . . . . . 3-1 3-3. Front Panel Coniponents . . . . . . . 3-1 3-8. Rear Panel Components . . . . . . . 3-1 3-11. Plug-In Units . . . . . . . . . . . 3-1 3-14. Operating Considerations . . . . . . 3-1 3-15. Definitions .

6、3-1 3-17. Control Functions. . . . . . . . . 3-3 3-21. Operating Tips . . . . . . . . . 3-3 3-23. Single-Shot Operation. . . . . 3-3 4-1. Overall Functional Description . . . 4-1 4-7. Circuit Description . . . . . . . * . 4-1 4-8. Low-Voltage Supply . . . . . . . . 4-1 4-16. Calibration . . . . . .

7、. . . . . . 4-2 4-20. High-Voltage Supply . . . . . . . . 4-2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . IV PRINCIPLES OF OPERATION. . . . . . . . 4-1 ii Model 141A Section Page 4-26. Storage CRT . . . . . . . . . . . 4-3 4-33. Pulse Circuit . . . . . . . . . . . 4-4 4-40. Trace Align .

8、 . . . . . . . . . . . . 4-4 4-42. Plug-In Kit Fabrication . . . . . . 4-5 V VAINTENANCE . . . . . . . . . . . . . . . 5-1 5-1. Introduction . . . . . . . . . . . . . 5-1 5-3. Performance Check . . . . . . . . . . 5-1 CRT Controls . . . . . . . . . . . 5-1 5-4. 5-5. Calibration . . . . . . . . . . .

9、 5-1 5-6. Adjustments . . . . . . . . . . . . 5-2 5-11. Adjustments of Low-Voltage Supply . . . . . . . . . . . . . 5-2 5-13. Adjustments of High-Voltage Supply. . . . . . . . . . . . . . 5-2 5-14. 5-16. Geometry Adjustment. . . . . . . 5-2 5-17. Calibration Adjustment . . . . . . 5-2 Pulse Circuit

10、Adjustment . . . . . 5-2 Intensity Limit Adjustment . . . . 5-2 5-15. Astigmatism Adjustment . . . . . 5-2 5-18. 5-23. Troubleshooting. . 5-6 5-24. Low-Voltage Supply . . . . . . . . 5-6 5-31. High-Voltage Supply . . . . . . . 5-6 5-36. Pulse Circuit . . . . . . . . . . . 5-8 5-40. Periodic Maintena

11、nce . . . . . . . 5-8 5-41. Electrical Maintenance . . . . . 5-8 5-43. Mechanical Maintenance . . . . . 5-8 5-45. Instrument Repair . 5-8 5-48. Major Component Repair . . . . . 5-8 5-52. Servicing Circuit Boards . . . . . 5-9 . . . . . . . . . . . . . . . . . . . VI REPLACEABLE PARTS . . . . . . . .

12、 . . 6-1 6-1. Introduction. . . . . . . . . . . . . 6-1 6-4. Ordering Information. . . . . . . . . 6-1 02567-1 RadioFans.CN 收音机爱 好者资料库 Model 141A LIST OF ILLUSTRATIONS List of Illustrations List of Tables Number Title Page 1-1. Model 141A Oscilloscope with Model 1400A Amplifier and Model 1402A Plug-

13、ins . . . . . . . . . . . . . . . . 1 - 1 2-1. Rack Mounting Procedure- . . . . . . . * 2-2 3-1. 3-2. 3-3. 3-4. 3-5. 3-6. 3-7. 3-8. 3-9. Model 141A Controls . . . . . . . . . . . 3-2 Background Illumination . . . . . . . . * 3-4 Variable Persistence . . . . . . . . . . . 3-4 Single-Shot Trace Bloom

14、. . . . . . . . 3-4 Single-Shot, No Bloom * - - . . - . . . 3-4 Fade Positive . . . . . . . . . . . . . * * 3-5 Single-Shot, Fast Sweep a - - . - 3-5 Single-Shot, Fade Positive . . . . . . . * 3-5 Storage Mesh Imperfections . - - . . * 3-5 4-1. Model 141A Block Diagram. . . . . . 4-1 4-2. Regulated

15、Power Supply Block 4-3. High-Voltage Power Supply Block Diagram . . . . . . . . . . . . . . . . 4-2 Diagram . . . . . . . . . . . . . . * . 4-3 Number 4-4. 5-1. 5-2. 5-3. 5-4. 5-5. 5-6. 5-7. 5-8. 5-9. 5-10. 5-11. 5-12. 5-13. 6-1. Title Page Pulse Circuit Block Diagram . . . . . 4-4 Component Locatio

16、ns, Bottom View. 5-3 Component Locations, Top View - . 5-5 High-Voltage Deck Removal . . . . . . 5-9 High-Voltage Deck Board . . . . . . . 5-10 Component Identification, Horizontal Component Identification, -High-Voltage Board . . . . . . . . . . . . . . . . 5-13 Low-Voltage Schematic Diagram - - 5-

17、14 High-Voltage Schematic Diagram - 5-15 Component Identification, Low-Voltage Board . . . . . . . . . . . . . . . . 5-15 Waveforms . . . . . . . . . . . . . . * 5-16 Pulse Circuit Schematic Diagram - - . 5-17 Component Identification, Pulse Circuit . . . . . . . . . . . . . . * 5-18 Plug-In Jack Co

18、nnection. a - . - 5-18 Driver Board . . . . . . . . . . . . 5-13 Cabinet Parts, Exploded View. 9 . . 6-2 LIST OF TABLES Number Title Page Numer Title Page 1-1. Specifications . . . . . . . . . . . . . . 1-0 5-4. Troubleshooting the High-Voltage Troubleshooting the Low - Voltage 1-2. Plug-Ins for Mod

19、el 141A Oscilloscope . . 1-2 Supply, NO Voltage - * * * * * - * 5-6 5 - 5. Supply. . . . . . . . . . . . . . . . 5- 7 2-1. Shipping Carton Test Strengths * * * - - 2-2 5 - 6. Troubles hooting High- Voltage Supply ; Incorrect Voltage- * * * - . 5- 8 4-1. Current Capability * * . . * - . 4-5 5-7. Sche

20、matic Diagram Notes . - - * 5-11 5-1. Equipment Required for Tests and 6-1. List of Reference Designators and . . . . . . . . . . . Adjustment. . . . . . . . . . . . . . . 5-0 Abbreviations. 6- 1 5-2. Low Voltage Adjustments - * * * - * - * 5-2 6-2. Replaceable Parts * - * * * 6-3 5-3. Condensed Adj

21、ustment Procedure * - 5-4 6-3. Code List of Manufacturers * . 6-12 02567-1 iii Section I Table 1-1 Model 141A Table 1-1. Specifications PLUG-INS: Erase: Manual; erasure takes approx. 100 msec. C AL IB RAT 0 R : Accepts all 1400-series plug-ins; upper compart- ment for horizontal axis and lower compa

22、rtment for vertical axis. Plug-ins operate directly into Type: Line-frequency rectangular signal, ap- horizontal and vertical deflectionplates. Center proximately 0.5 mec rise time. shield may be removed to provide double-sized Voltage: Two outputs: 1 volt and 10 volts peak- compartment for use with

23、 a single dual axis 1400- to-peak, *30/0 fromOOC to 35C, i3%from 0C series unit. to 55C. CATHODE RAY TUBE: BEAM FINDER: Type: Post-accelerator storage tube; 7.5 kvac- celerating potential; aluminized P31 phosphor; equipped with nonglare safety glass faceplate. Graticule: 10 x 10 cm parallax-free int

24、ernalgra- ticule, marked in centimeter squares; sub- divisions of 2 mm on majorhorizontalandver- tical axis, and on second and ninth horizontal graticule lines. Intensity Modulation: Approximately +2O-volt pulse will blank trace of normal intensity; ter- minals on rear panel. Pressing BEAM FINDER co

25、ntrol brings trace on screen, regardless of setting of horizontalor ver. tical POSITION, or INTENSITY control. GENERAL: Power Requirements: 115 or 230volts, +100/oAC Will provide 140 50 to 60Hz*, normally less than 285 watts (varies with plug-in used). watts of regulated power to plug-ins. Dimension

26、s: PERSISTENCE: NOTE 1 6 f 1 . 2 1 1 d DIW*YO*I I* IC*EI . I 1 IY(LLICILR(I1 Normal: Natural persistence of P31 phosphor I ; I $ ,o I., m C,A *.cI *EIG*T REAR .P*D*l RECESS (about 0.1 second). Variable: Continuously variable from less than 0.2 second to more-than one minute. WRITING RATE (with Varia

27、ble Persistence) t NORMAL Mode: Greater than 20 cm/ms. MAX Mode: Greater than 1 cm/us. BRIGHTNESS: Measured with entire screen faded positive; greater than 200 foot Lamberts. STORAGE TIME: =A I - . Store Mode: Traces can be storedfor more than one hour at reduced intensity. View Mode: Stored traces

28、can be viewed at nor- mal intensity for a cumulative time of more than one minute. ins). Shipping, 45 lbs. (20 kg). Weight: Net, 37 Ibs. (16,7 kg) (without plug- *This manual incorporates the name hertz, abbreviated Hz, as the unit for frequency. 1-0 02567-1 I I I I 1 1 I I I 1 1 I I I 1 1 I I I Mod

29、el 141A SECTION I GENERAL INFORMATION Section I Paragraphs 1-1 to 1-11 1-1. DESCRIPTION. 1-2. The hp Model 141A, Figure 1-1, is aconventional, general purpose Oscilloscope with the added features of variable persistence (duration of trace afterglow) and storage of CRT displays. Persistence is variab

30、le from 0.2 to more than 60 seconds; a display may be stored (at reduced intensity) for more than 1 hour or displayed at normal intensity for up to 1 minute. Stored displays can be erased in 100 milliseconds. 1-3. Variable persistence is especially useful for viewing slow-sweep signals. The persiste

31、nce of the signals from electrocardiograms or other bio-chemical phenomena can be adjusted to provide a complete trace, yet to fade fast enough to prevent interference with the next trace. Display persistence of swept frequency and time domainreflectometry measvrement readouts can be adjusted to eli

32、minate flicker and still provide high resolution. 1-4. The storage feature of the Model 141A can be used to store single-shot waveforms and to later view or photograph the phenomena. Comparison of wave- forms can be accomplishedby storing several displays separately and then viewing them simultaneou

33、sly. 1-5. plug-inunits. Amplifiers withbandwidths up to 20 MHz* The Model 141A accepts all hp Model 1400-series and sensitivities to 10 microvolts per centimeter are available as well as time domain reflectometry and swept frequency indicator units. Complete specifica- tions for the Model 141A Oscil

34、loscope are given in Table 1-1. 1-6. CATHODE R A Y TUBE- 1-7. The Model 141A uses an internal graticule, P31 aluminized phosphor CRT with additional internal elements to provide the variable persistence and stor- age features. The tube is equipped with a nonghre safety face plate and the internal gr

35、aticule eliminates parallax error in observing the display. 1-8. CRT WARRANTY. 1-9. The CRT used in the Model 141A is covered by a warranty separate from the instrument warranty. The CRT warranty is included in the back of this man- ual for use in the event of CRT. failure during the war- ranty peri

36、od listed thereon. 1-10. ASSOCIATED EQUIPMENT. 1-11. Some of the plug-ins available for use with the Model 141Aare listed in Table 1-2. The Model141A is normally operated with a vertical plug-in in the lower compartment and a horizontal plug-in in the upper compartment. Both plug-in compartments are

37、 _- Figure 1-1. Model 141AOscilloscope *This manual incorporates the name hertz, abbreviated Hz, as the unit for frequency. 02567- 1 1-1 Section I Paragraphs 1-12 to 1-15. the same size and the plug-in instruments may be interchanged for any special application. The divider shield, which separates t

38、he two compartments, may be removed and one double sized plug-in installed. Blank plug-in kits, both single and double sized, are available for user fabrication of special circuits. See Table 4-1 for power supply current limitations. 1-1 2. M A N U A 1 IDENTIFICATION 1-13. Information in this manual

39、 applies directly to Model 141A instruments with serial prefix of 547-. The serial prefix is the first 3 digits of the eight digit serial number (O-OOOOO) used to identify each Hewlett-Packard instrument. If the serial prefix Of a Model 141A is not 547-, a change sheet suppliedwith the manual will d

40、efine the difference between that Model 141A Model 141A and the one described in this manual, or a different manual may provide the information. Corrections to this manual due to any errors which existedwhen this manual was printed are calledErrata and appear only on the change sheet supplied. For i

41、n- formation pertaining to change sheets, contact the nearest Hewlett- Packard Sales/Service Office. 1-14. SCOPE OF MANUAL. 1- 15. This manual provides operating and maintenance instructions for the Model 141A Oscilloscope. This information is supplemented by the information con- tained in the 1400-

42、series plug-in manuals. For infor- mation on the operation and maintenance of plug-in units, refer to the manual for that particular instrument. Table 1-2. Plug-Ins for Model 141A Oscilloscope* hp Model 1400A 140 1A 1402A 1403A 1405A 1415A 1416A 1420A 142 1A 10477A 10478 Name Differential Amplifier

43、Dual Trace Amplifier Dual Trace Amplifier Differential Amplifier Dual Trace Amplifier Time Domain Reflectometer Swept Frequency Indicator Time Base Time Base and Delay Generator Blank Plug-In Blank Plug-In Check latest literature for additional new plug-ins. Description 100 pv/cm to 20 v/cm sensitiv

44、ity; DC to 400 kHz bandwidth. Dual trace and differential display; 1 mv/cm to 10 v/cm sensitivity; DC to 450 kHz bandwidth. Dual trace and differential display; 5 mv/cm to 10 v/cm sensitivity; DC to 20 MHz bandwidth. 10 pv/cm to 0.1 v/cm sensitivity; 0.1 Hz to 400 KHz band- width, variable bandwidth

45、 limits. Dual trace and Differential display; 5 mv/cm to 10 v/cm sensitivity; DC to 5 MHz bandwidth. Double sized plug-in for time domain reflectometry. Includes pulse-generator, vertical sampling, and time base functions. System risetime less than 0.1 nanoseconds; reflection coef- ficients of 0.001

46、 can be observed. Double-sized plug-in for swept frequency attenuation readout. Operates with hp Model 690-series sweep oscillators. Direct attenuation reading to -30 db and sensitivity to 0.5 db/cm. Sweep ranges from 0.5 psec/cm to 5 sec/cm; xIO magnifier expands fastest sweep to 50 nsec/cm. Single

47、 sweep and ex- ternal horizontal input functions provided. Internal or exter - nal triggering to greater than 10 MHz. Both Normal and Delaying sweeps from 0.1 psec/cm to 1 sec/cm; X5 magnifier expands fastest sweep to 20 nsec/cm; internal or external triggering to greater than 20 Mc. Delay time cont

48、inuously variable from 0.1 psec to 10 sec. Delay functions: Normal sweep; Mixed sweep; Intensified: triggered or armed; Delayed: triggered or armed. Single size for special purpose circuit. Double size for special purpose circuit. 02567-1 1-2 I I I I 1 1 i I 1 1 1 I I 1 1 I 1 I I I Model 141A Sectio

49、n II Paragraphs 2-1 to 2-16 SECTION II I N STA 11 AT1 ON 1 I 1 I 2-1. INITIAL INSPECTION. 2-2. MECHANICAL CHECK. If external damage to the shipping carton is evident, ask the carriers agent to be present when the instrument is unpacked. Check the instrument for external damage such as broken controls or connectors, and dents or scratches on the pa