HP-150A-AR-Manual 电路图.pdf

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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. I I RadioFans.CN 收音机爱 好者资料库 . . , - SPtClAL NOTE - RACK MOUNT MODEL ONLY With RACK MOUNT Model 150As only, remove

2、the two LARGE s c r e w s at the r e a r of the cabinet before installation. This permits the chass.is to s l i d e for- ward for- he,rvicing. t RadioFans.CN 收音机爱 好者资料库 OPERATING AND SERVICING MANUAL FOR MODEL 150A/AR HIGH FREQUENCY OSCILLOSCOPE SERIAL 40 THROUGH 3189 Copyright H EWL ETT -PA CKA R D

3、 COMPANY 1950 275 PAGE MILL ROAD, P A L 0 ALTO, CALIFORNIA. U.S.A. SPECIFICATIONS SWEEP GENERATOR INTERNAL SWEEP MAGNIFICATION TRIGGERING: TRIGGER POINT: SINGLE SWEEP SAWTOOTH OUTPUT: GATE OUTPUT: HORIZONTAL AMPLIFIER BANDWIDTH: SENSITIVITY INPUT IMPEDANCE: VERTICAL AMPLIFIER CALIBRATOR OUTPUT 24 ca

4、librated range$ pr accurate to within.3%. A vernier control provides continuous adjustment of sweep speed between calibrated ranges and extends slowest sweep to 15 sec/cm. 5 cabrated ranges; X1, X5, XlO, X50 and X l O O magnifies center portion of unmagnified trace, increases fastest sweep speed to

5、.02 psec/cm except 1 psec X50 magnification and 2 psec XlOO mag- nification. X1 and X5 rahges retain accuracy of original sweep. Inter 1/2 ( mal, from line I :m or more vert mwer or vertical input signal which causes ical deflection. Externa, eitnec capacitive or direct coupled,with 1/2V p-por more

6、Sweep can be triggered from either a positive or a negative going voltage; the triggering voltage level if external sync signals is continuonsly adjustable from -30 to +30 volts. Switch position automatically provides optimum sync stability for Switch provides single-sweep operation. , . +20 to -20

7、volt. sawtooth output. available concurrent with sweep. 20-volt positive pulse for duration of swekp. majority of uses. ,- ,I _ - I, Direct current to 500 kilocycles. 5 ranges provide sensitivities from 0.2 volt/cm to 5 volts/cm. A vernier control provides continuous adjustment between ranges and ex

8、tends the minimum sensitivity to 15 volts/cm. 1 megohm Shunted by approiimately 27 ppfi , used with plug-in preamplifier units. See instruction manual for particular model used. Nominal 1000-cycle square wave having approximately 1 psec rise and decay time available at front-panel connector. 18 cali

9、brated ranges provide from 0.2 millivolt to 100 volts peak- to-peak, accurate to within 3%. CONTENTS L *: Power Cord. . 1 - 1 1 - 1 ,Cooling I . . : 1 - 4 .G,;,l , : - . .5 1,- 7 . I - . . . I 1 . . . . . . . . . . I t ._ -. . 1:6-; OverlaadReiay 1 - 1 230-Volt.Operation . , . 1 - 2 . , -,-. ,. . .

10、. , . -.: , i . . . , , . . , , 1 . . I . . . .I . - - SECTION I GENERALDEZCRIPTON -. . . Page I . -SECTION n - 1 - 2 OPERATING INSTRW CTIONS . -1 Instrument Safety Devices . .- . . . . 11-1 2 , l Controls aniiTe,rminals . : * . . . . . . . 2 - 3 Vertical Amplifiers . I1 - 1 2 - 4 AC or DC Coupling

11、. . . . . . . . . . . . . . . . . . . . . . . . . 11-1 . 1 . .- 2 5 . AC-2lA Low-Capacity Probe . ; . . . . . . . . . . . . . . . . . 1 1 - 1 , , . , 4 1 1 - 1 . , . . -: i2 : . . . . . . . ._ ._ I- I . - : . . .I . . . -. . I SkCTIONfII THEORY OF OPERATION 3 - 1 Over-All Operation . - 1 7 +, i f ib

12、-f z .:,T. -:3ic.$ . Vertical -Amplifier . III - 1 3 - 3 Horizontal Amplifier . 1 1 1 - 2 3 - 4 Synchronizing Circuit . ._. . III - 2 3 . 5 e SW Generator . 1 . . . ; . III - 2 3 - 6 Single Sweep Operation . III - 3 3 - 7B Protective Circuits - Serial 40 through 339 3 -:qc: 3 - 8 Regulated High-Volt

13、age Power Supply . 1 1 1 - 6 Calibrator . 1 1 1 - 6 3 - 9 L I I - 3 1 1 1 - 4 1 1 1 . 5 - / . * . - ,. 3 2 7A:- Regulated Low-Voltage Power Supply . . . . . . . Protective Circuits - Serial 340 and above .- I - - . SECTION r v MAINTENANE . . I Genefd Information . . . . . . . . IV - 1 4 - 2 Routine

14、Servicing . . 4 - 3 Condensed Test And Adjustment P-rocedure . . . . . . . . . . . . IV - 5 4 - 4 Trouble,-Shooting Procedure . IV - 7 . 4 ,- 7 . High Voltage Power Supply And Calibrator . IV - 10 . - . 4 Ir : s IV - 1 * . c . I - ; _ A - 4 - 5 Detarled Test And Adjustment Procedures. . . . . . . .

15、. . . . . IV - 8 4 - 6 Low Voltage Power Supply . IV - 8 IV - 12 4 - 9 Main Vertical AmplifieF . IV - 16 4 - 10 Sweep Generator And Sync Circuits . . IV - 17 . .I . :1 -, , .-, .- . - . - , .-. . . Cabinet Mount: Net 65 lbs., shipping 105 Ibs. Model 151A High Gain Amplifier, dc to 10 mc, 5 mvtcm. Mo

16、del 152A Dual Trace Amplifier, dc tr, 10 mc, 50 mv/cm. Model 152B Dual Trace Amplifier, dc to lO.mc,differential input, Model 153A HighGainDifferential Amplifier, dc to 500 kc, 1 mv/cm. L I Rack Mount: Net 85 ibs., approximately. . - Model-115A Testmobile, . , Model 116A Testmobile Storage Unit, Mod

17、el AC-Ll7A Accessory Storage Drawer, AC-8SA Viewing Hood, 460B-95A, Oscilloscope adapter for connecting the output of a 460B Fast Pulse Amplifier to the 150A/AFt Deflection Plates, AC-21A Probe, 10: 1, specify grey or black lead, AC-2lC Probe, 5 , . , . ,.-e * -1. trical M-mufacturers Association. T

18、he third con- . tact .is an offset round pin, added, ta- a standard two- cope is +general . blade,iac-plug, which grounds the instrument chassis purpose osciloscope employing a 5 AMP- mono- whenusedwith the appropriate recepticle. An adap- accelerator type cathode ray tube withunitized, plug-,- . te

19、r ,should ; b e used to connect the .NEM4 plug to a in construction for maximum accessibitityand flexi- standard t60 contact output. m e n the adapter is bility. It ca.be used with either internal 09 external ,used, the ground connection beoomes, a short lead sweeps which can be either internally or

20、 externally from the adapter which should be connected to a suit- synchronized. ,* horizontal amplifier incorporates _able ground for the ProtectioR QfpPera.t.bg personnel . ing basic internal sweegqup to 100 times., The in- .On the .r.ack mount Model 15OAR, the instrument term1 sweep range extends

21、fnm -02 psec/cm to 15 is connected to the ac receptacle in the cabinet h sec/cm. - + . :- c, . _ . means of a,retracting coil cord. This permits instrument,.to I. ,Slide out of the cabinet while stil The Model 150A uses a variety of vertical amplifier operation. plug-in units to perform different fu

22、nctions. The I. various plug-in amplifiers available are described in the table of spec,lf,*,.-,(-*.- r * : 1-5: COOLING, e * . Since operation of the rmcb model i s sirnilartto that .The.Model15OA empWs aforced draft cooling s of the cabinet modelf the.operatian within the case. The air intake and

23、filter are 10- cated under the instrument case and adequate cooling j -. 7 ( * i magmficationclrcuitry which is capable of expand- . . . .- - .- 62, 2- . , *I - I I- -I . 1 . : - If - :- 1 : ._ , . ,._ , , . , - . . . . . . . . . ., . ., , a 4 I . .I_. ; . . . , . _ , .I . . . . - . . , . . I . - i

24、- . . . . I . . - I I., , . . . .,. , . . . . , , ,I. . . ,_. . :. . . . . - . . . . .j. ., 1 . I .I . . . . , ,. 8. . . . . . . . . 0.02 psec/CM, Iy 4 I- , . . . . , , . , . I , ,._. :. . ; .: t . . . .- ,. . . . , . =- ._ . , . . , ! . . , . . . . * , , : * . . _ . . . . . r . . .-: , : . I - i 1

25、, . _ . . . 3. Adjust horizontal position. - - 2 - .I ,I ._ , . i . - . , . _ 1. Invert s / . external . I. horizontal , i signal. -. . L .L . 4. Turn SYNC seeleetor tb an EXT. position. . . c * (:. . . 2. , Selectdesired sensitivity, on EXT. INPUT of . -5., :Skt SWEEP *DE.;j;?5t -off PmSET. . HORIZ

26、. SENSITIVITY controi., * j I_ . b t : . Figure 2-4 .- . Sect. I1 Page 6 1. 2. 3. ADJUSTING MODEL AC-21 PROBES I Connect the AC-21 Probe to thedeslred ver- tical input, and set the VERTICAL PRESEN- TATIONselector to the corresponding input. Set the CAJJBRATORselector to 2v. Set the vertical VOLTS/CM

27、 selector to .05i Set theSWEEP TIME/CM selector to 4 MIL- LISECOND/CM: set the SYNC selector to INT: the SYNC control to PRESET. 4. Touch the prdeflection plate potential. Turn-off the tnstrument before making connection to deflection )late terminals. f. _. I. - A2.-Relocate leads from F, I, D3 and

28、D4 as shown bj dashed lines. . . I . . . . . B. Single-Ended Input , I ; . I . $b -A I . . Cbnh ,. . . . . - . c . . -. . . - - ,. , . -I., ., . . I. . :, ; . . 1 . I. . -.- - ._ . _- - -. . ._ . . . -: , _ - . . - . . . . . . . . . .-. - -. =. i,; I . . -, r . . 1 . .i! . . . . . . . . .- . . .- .

29、. . . . . c . . . . . 0 2: :. : ! % , ,.- . , . .: . , . - . .I ; I. . , , . . . . , . . .I ! I ., , . - , ., . - . . , . . . . . . _ . . . . . . . . : , . . . . , . .I . . ., . . . . . . . . . . . . . . . . . . . . . (., ., . . . 1 _. , . . . . . . . . . . . ., . . .JS. . . : 1 . . . . . i ; ? ALIG

30、NMENT OF CATHODE RAY TUBE: , Lever (2) controls both radial and longitudinal . positioning of CRT and is locked clamp (1). _ - Figure 2-9 . . . . . . . . . . . . . . . . .- . - . . . . . . . . . Sect. II Page 11 SINGLE SWEEP AND INTENSITY MODULATION OPERATlON THERMAL OVERLOAD SWITCH( MANUAL R E S E

31、T 9 ARRANGEMENT FOR RACK MOUNT MODEL 150AR 0 - Set selector switch to SINGLE OR EXT. sweep. Select sweep speed. Set SYN switch to INT. and SWEEP MODE to PRES ET. 7. Indicator should light as soon as SWEEPMODE control is returned to PRESET. Wheninput signal is received, sweep will fire once, indicato

32、r(7) will extinguish, and sweep will remain locked out until reset as described in step 6; or Select desired vertical sensitivity. 8. Resetting can be accomplished by placing 1-200 psec width, + 12 to +18 volts peak pulse into RE- SET terminal. Adjust LEVEL to and SLOPE To intensity modulate the CRT

33、 withexternalsignals: as desired. (In some applications it may be con- venient to establish desired TRIGGER LEVEL NORMAL operation.) =? -s6t,.INT4zR EXT.Z switch to m.z. b) . . - -_- - 1. - Conned modulating signal to input terminals. , . I . . -c) :IApositi.ve voltage of 20 volts peak willblank the

34、 Switch SWEEP MODE control Ouc of PRESET and. CRT trace;from normal intensity. A negative back to PRESET to arm sweep circuit. . - _ (. -. . . input will brighten the trace. Sect. I I Page 12 Q d LD-LI-79 ARRANGEMENT FOR - RACK-MOUNT MODEL DELAYED SWEEP OPERAnON THERMAL OVERLOAD SWITCH (MANUAL RESET

35、) 7 - 1. 2. 3. 4. 5. 6. 7. 150AR . - Set selector switch to NORMAL or DIT. Select sweep speed. Set SYNC switch to INT and !WEEP MODE to PRESET. Select desired vertical sensitivity. Adjust LEVEL and SLOPE for triggering. Set selector switch to SINGLE SWEEP. Cam determines the direction of spot deflec

36、tion for a given input signal polarity; determines the verti- cal position of the spot on the screen: supplies a signal for internal synchronization; and incor- porates a 0.25 psec delay in the input waveforms. . The complete Vertical Amplifier circuit is in separate parts: first the input attenuato

37、rs, phase inverter, vertical position controls and ampli- fiers in the Vertical Amplifier Plug-In Unit, and second the intermediate and final amplifiers on the instrument chassis. b. Horizontal Amplifier - The horizontal amplifier is driven either from the HORIZ. INPUT jack or from the internal swee

38、p generator. The complete Horizontal Amplifier consists of the main amplifier, and a preamplifier (used only for external signals applied to the HORIZ. IN- PUT connector). The preamplifier stage includes the VOLTS/CM portion o f the HORIZ. SENSITW- ITY selector switch and is not in use when the swit

39、ch is set to one of the MAGNIFICATION po- sitions. The MAGNIFICATION circuit o f the HORIZ. SENSITIVITY selector is in the Main Horizontal Amplifier. The sawtooth sweep is applied directly to the Main Horizontal Amplifier while external signals are first applied to the HORIZ. SENSITIVITY switch and

40、the preampli- fier. , c. Sync Circuit - The Synchronizing Circuit re- ceives a signal either from the Vertical Ampli- fier for internal synchronization, from the EX”. SYNC INPUT or from an internal power line source. The Sync Circuit amplifies all input sig- nals, and determines the level and polari

41、ty which will start a sweep. d. Sweep Generator - The Sweep Generator starts on receiving a sync pulse from the Sync Circuit and generates a sawtooth to drive the Horizontal Amplifier. The Feedback Integrator determines the basic sweep time per centimeter, and the SWEEP MODE control selects triggere

42、d or free- running operation. A SINGLE SWEEP switch provides either single or repetitive sweeps. The sweep generator also supplies unblanking pulses to the CRT, a timing signal (during each saw- tooth flyback) to the Dual Channel Vertical Am- plifier Plug-In Unit for ALTERNATE operation, and sweep a

43、nd gate signals to output connectors. e. The CRT - The CRT is a type 5AMP - mono- accelerator tube with the cathode operated at -4800 volts. The mono-accelerator anode makes possible a simple astigmatism adjustment (lo- cated inside the access hatch) which requires no resetting when adjusting the FO

44、CUS or INTENS- ITY. The deflection plate terminals located on the periphery of the. tube neck are connected through removable jumpers directly to the Main Vertical Amplifier, Horizontal Amplifier, and Astigmatism control. 3-2 VERTICAL AMPLIFIER The signal from the plug-in vertical amplifier is coupl

45、ed through a connector on the plug-in unit chas- sis to the Main Vertical Amplifier on the instrument chassis . Input amplifiers V1 and V2 provide a maximum g a i n of approximately 20 db. The gain adjustment poten- tiometer R5 has a range of approximately 4 db ob- tained by varying V1 and V2 cathod

46、e circuit degen- eration. Sect. IV Page 1 SECTION I V MAINTENANCE 4-1 GENERAL INFORMATION This section contains instructions for testing, ad- justing and trouble-shooting the Model 150A Oscil- loscope. If the instrument is operating, the Con- densed Test and Adjustment Procedure, paragraph 4-3, is a fast method of checking the basic adjust- ments and operation. The Trouble-Shooting Proce- dure, paragraph 4-4, is a