HP-143A-Manual-SNP_925 电路图.pdf

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1、 HP Archive This vintage Hewlett Packard document was preserved and distributed by www. Please visit us on the web. For free distribution only! Thanks to on-line curator: Bernhard Voss for supplying and scanning this vintage document. RadioFans.CN 收音机爱 好者资料库 l tl I OPERATING AND SERVICE MANUAL 1 : 0

2、scrrr0sc0 PE 143A HEWLET PACKARD ) ;) c . :! . :z: OPERATINGANDSERVICEMANUAL OSCILLOSCOPE 143A _.- .- HEWLETT=hPACKARD . w ;po RadioFans.CN 收音机爱 好者资料库 CERTIFICATION The Hewlett-Packard compang certifies that this instrument uas thoroughly tested and inspected and found to meet its published specific

3、ations uhen it uas shipped from the factory. The Hewtett- Packard company further certifies that its calibration measure- ments are traceable to the u.s. National Bureau of Standards to the ertent alloued bg the Bureau,s calibration facitita. WABRANTY AND ASSISTANCE This Hewlett-Packard product is w

4、arranted against defects in materials and workmanship. This warranty applies for oneyear from thedate of delivervortin thecase of certain major components listed in the operating manual, for the specified period. we will repair or replace products which prove to be defective during the warranty peri

5、od provided they are returned to Hewlett-packard. No other arranty is expressedor implied. we are not riabrefor consequential damages. service contracts or customer assistance agreements are available for Hewlett-Packard products that require main- tenance and repair on-site. For any assistance, con

6、tact your nearest Hewlett-packard sales and service office. Addresses are provided at the back of this manual. I I CERTIFICATION TheHewlett-PackardCompanycertifies that this instrumentwas thoroughly testedandinspectedandfoundtomeet its published specifications when it was shipped from the factory.Th

7、eHewlett- PackardCompanyfurther certifies that its calibration measure- mentsaretraceabletotheU.S.National Bureau of Standardsto the extent allowedbythe Bureaus calibration facility. WARRANTYANDASSISTANCE ThisHewlett-Packardproductiswarrantedagainstdefects inmaterialsandworkmanship.Thiswarrantyappli

8、esfor oneyearfromthedateofdelivery,or,inthecaseofcertain majorcomponentslistedintheoperatingmanual,forthe specifiedperiod.Wewillrepairorreplaceproductswhich provetobedefectiveduringthewarrantyperiodprovided theyarereturnedtoHewlett-Packard.Nootherwarranty isexpressedorimplied.Wearenotliableforconseq

9、uential damages. Servicecontractsorcustomerassistanceagreementsare availableforHewlett-Packardproductsthatrequiremain- tenanceandrepairon-site. Foranyassistance,contactyournearestHewlett-Packard SalesandServiceOffice.Addressesareprovidedatthe backofthismanual. RadioFans.CN 收音机爱 好者资料库 OPERATING AND S

10、ERVICE MANUAL M OD EL I43A OSCILLOSCO PE SERIALS PREFIXED: 925- Refer to Section I For lnstruments Wth Other Serial Prefixes HEWLETT.PACKARD COMPANY/COLORADO SPRI NGS DIV ISION 19OO GARDEN OF THE GODS ROAD, COLORADO SPRINGS, COLOBADO. U,S.A, PRINTED:AUG I969 v o2640-202640-2 OPERATINGANDSERVICEMANUA

11、L MODEL143A OSCILLOSCOPE SERIALS PREFIXED:925- RefertoSection I For Instruments With Other Serial Prefixes HEWLETT-PACKARDCOMPANY/COLORADOSPRINGSDIVISION 1900GARDENOFTHEGODSROAD,COLORADOSPRINGS,COLORADO,U.S.A. PRINTED:AUG1969 Model 1434 Table of Contents Section TABLE OF CONTENTS o vll ill IV GENERA

12、L INFORMATION 1-1. lnstrument DescriPtiorr 1-5. Cathode-ray Tube . 1-8. Warranty 1-10. Associated Equipment 1-12. Manual ldentification and Changes 1-1 5. Scope of Manual INSTALLATION . . 2-1. lnitial lnspection 2-4. Preparation for U 2-5. Power Requirements 2-7. 23Gvolt Operation 2-9. Three Conduct

13、or Power Cable 2-11.CoolinS. 2-12. VentilationRequirements 2-14. Fan and Air Filtei 2-16. lnstrument Mounting 2-19. Claims 2-22. Repackaging for ShiPment OPERATION 3-1. lntroduction 3-3. Controls and Connectors 314. Plug-in Units . Section Page 5-12, Beam Finder Sl S13. lntensity 5-1 5-14. Focus and

14、 Astigmatism 5-2 5-15. Trace Align f2 5-16. Orthogonality . 12 5-17. Calibrator . 5-2 s18. Adjustments 52 5-22. PreliminarySet-up. 12 5-24. Low-voltage Power Supplies . 5.3 *26. High-voltage PowerSupply . . . 5-3 S28. lntensity Limit . 5-3 5-30. Astigmatism 53 5-32. Trace Alignment 5-3 S34. Geometry

15、 . S3 536. Calibrator ,.5-4 5-37. Plug-in Adjustments 54 REPLACEABLE PARTS 6-T 6-1. lntroduction . 6-1 6-4. Orderinglnformation . 6-1 MANUAL CHANGES AND OPTIONS . . . 7.1/7.2 7-1. Manual Changes 7-117-2 7-3. Options .7-117-2 7-5. Special lnstruments 7-1/7-2 VIII SCHEMATICS AND TROUBLESHOOTING 8-1 ve

16、rtical and horizontal circuits are of the plug-in type and operate directly into the CRT, 1-3. Presently available plug-ins provide a choice of operating characteristics such as wide bandwidth (including sampling), high gain, and single, dual or four channel operation in combination with normal, sin

17、gle or delayed sweeps. ln addition, two single or multi-channel vertical amplifiers can be used simultaneously for X-Y display since both vertical and, horizontal deflection sensitivities are identical. By removing the partition between upper and lower compartments, double size plug-ins can be used

18、for time domain reflectometry and swept f requ ency measu rements. 1-4. A large display area, I by 10 inches, permits viewing from a distance or by several people. Other features include a parallax-free internal graticule, a beam finder push-button to quickly locate trace position, a Z-axis input fo

19、r intensity modulation and line-f requency square-wave calibrating voltages of l and 10 volts peak-to-peak. Except for the CRT, all active components are solid-state deyices. Complete instrument specif ications are listed in Table 1-1. 1-5. CATHODE-RAY TUBE. 1-6. The standard CRT supplied wth ths in

20、strument has an internal graticule and an aluminized P31 phosphor. Due to the internal graticule, parallax errors are eliminated when viewing a display. Following are other phosphors available as options at no extra cost: P2 general purpose, P7 long persstence with an amber filter and P1 1 fast writ

21、ing. 1-7 . An aquadag painted fiberglass cloth jacke surrounds the CRT from the face-plate to a point just before the neck. This coating provides implosion protection for operating and maintenance personnel. 1-8. WARRANTY. 1-9. This instrument is certified and warranted as stated on the inside front

22、 cover of this manual. The CRT, however, is covered by a separate warranty located at the rear of the manual. Should the CRT fail within the time specified in the warranty, fill out the failure report form on the reverse side of the warranty statement and return with rhe cRT. 1-10. ASSOCIATED EOUIPM

23、ENT. 1-11. Some of the plug-ins available for the Model l43A are listed in Table 3-1. Normally a vertical plug-in is used n the lower compaftment, and a time base plug-in is used in the upper compartment. However, other combinations are posible. Refer to Section lll for a detailed explanation of app

24、lications and operating information. 1-12. MANUAL IDENTIFICATION AND CHANGES. 1-13. This manual applies directly to Model 143A instruments with a serial pref ix as shown on the title page. The serial prefix is the first three digits of the eight-digit (000-00000) serial number located on a plate at

25、the rear of the instrument. For instruments with a serial prefix other than the one on the title page, refer to either an enclosed Manual Changes sheet or to Section Vll for information necessary to make this manual correspond to the instrument. 1-14. Manual printing errors are called Errata, and ar

26、e corrected on an enclosed Manual Changes sheet (if any). Refer any questions regarding the instrument, manual or change sheet to the nearest HP Sales/Service Office listed at the rear of this manual. Be sure to identify the nstrument by both model and eight-digit serial number in all correspondence

27、. 1-15. SCOPE OF MANUAL. 1-16. This manual contains complete operating and service information for the HP Model 1434 Oscilloscope and supplements the information presented in the Model 1400-series plug-in manuals. All aspects of the instrument are covered in eight sections, each of which can easily

28、be referred to for specific data by use of the table of contents. Schematics are located at the rear of the manual on fold-out pages to permit reference to the text, and an over-all block diagram is in Section lV. 1-1 Model143A SECTION I GENERAL INFORMATION Section I 1-1.INSTRUMENT DESCRIPTION. 1-2.

29、TheHPModel 143A (shown in Figure 1-1)isa general purpose, wide-screen, plug-intypeoscilloscope. All power supplies, a calibrator signal generator circuit andthe CRTarecontainedinthisinstrument;verticaland horizontal circuits areoftheplug-intypeand operate directly intotheCRT. 1-3.Presentlyavailablep

30、lug-insprovide a choiceof operatingcharacteristicssuchaswidebandwidth (including sampling), high gain, and single, dualorfour channeloperationincombinationwithnormal, singleor delayed sweeps. In addition,twosingleormulti-channel vertical amplifiers can be used simu ItaneouslyforX-Y displaysincebothv

31、erticaland. horizontaldeflection sensitivitiesareidentical.Byremovingthepartition betweenupperandlowercompartments,doublesize plug-ins can be usedfortimedomainreflectometry and swept frequency measurements. 1-4.A large display area,8by 10 inches, permits viewing froma distanceorby several people.Oth

32、erfeatures include a parallax-free internal graticule, a beam finder push-buttontoquicklylocate trace position, a Z-axis inputforintensitymodulationandline-frequency square-wavecalibratingvoltagesof1and10volts peak-to-peak. ExceptfortheCRT, all activecomponents are solid-state devices. Completeinstr

33、umentspecifications are listedinTable 1-1. 1-5.CATHODE-RAY TUBE. 1-6.ThestandardCRT supplied with this instrument has an internal graticule and an aluminizedP31phosphor. Due totheinternal graticule, parallax errors are eliminated when viewing a display. Following areotherphosphors available asoption

34、satnoextracost: P2 general purpose, P7long persistence with an amber filter andP11fast writing. 1-7.Anaquadagpaintedfiberglassclothjacket surroundstheCRTfromtheface-platetoapointjust beforetheneck.Thiscoatingprovidesimplosion protection for operating and maintenance personnel. 1-8.WARRANTY. 1-9.This

35、 instrumentiscertified and warranted asstated ontheinsidefrontcoverofthismanual. The CRT, however,iscoveredbya separatewarrantylocatedatthe rearofthemanual. ShouldtheCRT fail withinthetime specified inthewarranty, filloutthefailurereportform onthereverse sideofthewarrantystatementandreturn withtheCR

36、T. 110. ASSOCIATED EQUIPMENT. 1-11.Someoftheplug-ins availablefortheModel 143A are listedinTable 3-1. Normally a vertical plug-inisused inthelowercompartment,and atimebase plug-inisused intheuppercompartment.However,othercombinations are possible. RefertoSectionIIIfora detailed explanation ofapplica

37、tions and operating information. 1-12.MANUALIDENTIFICATIONAND CHANGES. 1-13. ThismanualappliesdirectlytoModel143A instruments with a serial prefix as shown onthetitle page. Theserial prefixisthefirstthreedigitsoftheeight-digit (000-00000) serial number located on a plateattherearof theinstrument.For

38、instrumentswitha serial prefixother thantheoneonthetitlepage, refertoeither an enclosed Manual Changes sheetortoSectionVIIfor information necessarytomakethismanualcorrespondtothe instrument. 1-14. Manual printing errors are called Errata, and are corrected on an enclosed Manual Changes sheet (if any

39、). Referanyquestions regardingtheinstrument, manualor change sheettothenearestHPSales/Service Office listed attherearofthismanual.Besuretoidentifythe instrumentbybothmodel and eight-digit serialnumberin allcorrespondence. 1-15.SCOPEOFMANUAL. 1-16. Thismanualcontainscompleteoperatingand service infor

40、mation fortheHPModel 143A Oscilloscope and supplementstheinformation presentedintheModel 1400-series plug-in manuals. All aspectsoftheinstrument are coveredineight sections, eachofwhich can easily be referredtoforspecificdata by useofthetableof contents. Schematics are locatedattherearofthemanual on

41、 fold-out pagestopermit referencetothetext,and an over-all block diagramisin SectionIV. 1-1 Table 1-1. Specifications PLUG-INS: Accepts standard Model 1 4O0-series plug-ins. Upper compartment for horizontal axis and lower compartment for vertical axis. Center shield may be removed to provide double-

42、sized compaftment for use with a single dual axis plug-in. Plug-in units operate directly into the CRT horizontal and vertical deflection plates. Plug-in panel nomenclature of centimeter divisions translates directly to inch divisions on the Model 1434 display. For example, 5 V/cm sensitivity is dis

43、played as 5 V/inch, and time/cm is displayed as time/inch. CATHODE-RAY TUBE: Type: Post accelerator, 20 kV accelerating potential, aluminized P31 phosphor (other phosphors available on order). Etched safety glass faceplate reduces glare. Graticu le: I x 1O-inch parallax-free internal graticule, mark

44、ed in one inch squares. Subdivisions of O2 inch on major horizontal and vertical axes. lntensity Modulation: AC coupled (down 3 dB at 4 kHz). +20 volt pulse will blank trace of normal intensity; input terminal and switch on rear panel. CALIBRATOR Type: Line-frequency rectangular signal, approxmately

45、 0.5 usec risetime. Voltage: Two outputs: 1 volt and 10 volts peak-to-peak, 11% from 15d c to 35o c;t3% from 0o c to 55o c. BEAM FINDER: Pressing control brings trace on CRT screen of settings of horizontal, vertical or intensity control setti ngs. GENERAL: Power Requirements: 115 or 230 volts tl0%,

46、50 to 60 Hz, normally than 285 watts (varies with plug-in units ud). Dimensions: TYPICAL MOUNfING HOLE SIZE AND LAIION Weight: Wthout plug-ins, net 63 lbs (28,6 kg); shipping lbs. (36,3 ks). Accessories Furnished : Rack mounting hardware for conversion to standard EIA rack configuration. Model 1434

47、Section I i I 0il l 1-2 Section IModel 143A Table 1-1. Specificationsr PLUG-INS:BEAM FINDER: GENERAL: Power Requirements: 115or230volts 10%,50to60Hz, normally less than285watts(varies with plug-in units used). PressingcontrolbringstraceonCRTscreen regardless ofsettingsofhorizontal,verticalorintensit

48、ycontrol settings. I I ZI .u. o .- SICEfRO/rf ,.li i . J1 TYPICAL MOUNTING HOLESIZE ANDLOCATION D NOTt DiMEH5IONINIfCCHESAND 1LLlMHERSI ,., ,tUi Dimensions: Graticule: 8x10-inch parallax-free internal graticule, marked inoneinch squares. Subdivisionsof0.2inchon major horizontalandvertical axes. Inte

49、nsity Modulation: ACcoupled (down 3 dBat4 kHz).+20voltpulse will blank traceofnormal intensity;inputterminal andswitchonrear panel. AcceptsstandardModel1400-seriespiug-ins. Upper compartmentforhorizontalaxisandlower compartmentfor vertical axis. Center shield may be removedtoprovide double-sizedcompartmentforuse with a single dual axis plug-in. Plug-in unitsoperate directly intotheCRThorizontalandvertical deflection plates. Plug-inpanelnomenclatureofcentimeterdivisions translates directlytoinch divisions