HP-175A-Manual_SNprefix-344 电路图.pdf

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1、HP Archive This vintage Hewlett Packard document was preserved and distributed by vvwvv. h parc Please visit us on the web ! Scanned by on-line curator: Tony Gerbic * For FREE Distribution Only * RadioFans.CN 收音机爱 好者资料库 RadioFans.CN 收音机爱 好者资料库 OPERATING AND SERVICE MANUAL MODEL 175A SERIALS PREFIXED

2、: 344- OSCILLOSCOPE 1963 1501 P A 6 1 power line; Triggering Sensitivity: external, ac or dc coupled. Internal, approximately 2 mm vertical deflection at 1 mc, 2 cm at 50 mc. External, approximately 0.25 volt peak-to-peak at 1 mc, approximately 0.5 volt peak-to-peak at 50 mc. and slope. Triggering P

3、oint: Controls allow selection of level HORIZONTAL AMPLIFIER Bandwidth: DC coupled, DC to 500 kc; AC coupled, 2 cps to 500 kc. Sensitivity: 2 ranges; 0.1 volt/cm and 1 volt/cm, accuracy *5%. Vernier provides continuous adjustment between the ranges and extends minimum sensitivity to 10 volts/cm. Inp

4、ut Impedance: 1 megohm shunted by approx 30pf. MAIN VERTICAL AMPLIFIER Rise Time: Less than 7 nsec. CALIBRATOR Type: 1 kc square wave, approx 3 psec rise time. Voltage: 2 ranges, l v and 1Ov peak-to-peak *l% at 15C to 35C ambient, i3% 0C to 55C ambient. CATHODE RAYTUBE ANDCONTROLS Type: Post acceler

5、ator, 12 kv accelerating poten- tial, ( $ 4 Type G205. P31 aluminized phosphor standard, other phosphor available are P2, P7, and P11. Graticule: Internal, parallax free 6 x 10 cm, marked in cm squares. 2-mm subdivision on major axis. Intensity Modulation: Approximately +20-volt pulse will blank tra

6、ce of normal intensity (BNC connector on rear panel). GENERAL Power: 115 or 230 v *10%50 to 60 cps. 425 watts max, (depends on plug-ins used). Diminsions: 16-3/4 inches wide, 12-1/4 inches high, 24-3/8 inches deep overall; hardware furnished for quick conversion to 12-1/4-inch x 9-inch rack mount, 2

7、2 inches deep behind panel. Weight: Net approximately 70 lb maximum (de- pends on plug-ins used). Accessories Furnished: Two 10003A (AC-21M), 1O:l voltage divider probes; one detachable power cable; rack mount- ing kit. 015 26- 2 1- 1 Section I Table 1-1 and Figure 1-2 Model 175A Table 1-1. Specific

8、ations (Contd) Accessories Available: Model 1752B High Gain Vertical Amplifier, Model 1754A Four Channel Amplifier, dc dc to 40 mc. to 40 mc. 10175A 10175B (AC-83A) Viewing Hood Model 196B Oscilloscope Camera, includes ultraviolet light source for illuminating the graticule andpre-sensitizing film.

9、Model 1115A, 1116A, 1117A Testmobile Plug-In Horizontal Time Base Units: Model 1780A Auxiliary Plug-In Model 1781B Sweep Delay Generator Model 1782A Display Scanner ($3 Model 1783A Time-Mark Generator Plug-In Vertical Amplifiers: Model 1750A Dual Trace Vertical Amplifier, OPTIONS 08. Sawtooth Output

10、 (approximately -2.5 volts to +2.5 volts) and Gate Output (+5-volt pulse nominal, riding on a -2.5 volt level). dc to 40 mc. dc to 50 mc. dc to 22 mc. Model 1751A Single Channel Vertical Amplifier Model 1752A High Gain Vertical Amplifier, CATUODC RAY Tun1 WARRANTY The cithcde ray t u b supplled In y

11、our Hnvletl-Pnekard Olelllosep md replacement catMe ray tubes plrehased from p , are paranteed apinst elcctrlcal failure for one year from the date of sale by thenewlett-PickardCompany. Broken tubes ortubes W i t J L h m e d phompbr arc not Included In this parantee. Your lwil Hnvlett-Paekard iepese

12、nttlve malntnlrn a ebck of replacementtube8 and will be glad to proeesa pur warranty claim for you. Please EOIISUI him. whenever a tube 1s returned for P warmty claim, the reverse aide ofthim sheet must be fllled out In full and returned with the tube. FolloV8hlpplng lnibUctlon6 EarefUllyto Insure d

13、 e nr- rival, slnce m credtt can be allowed on broken tubes. m m m G INSTRUCTIONS 1) Crcfully wrap the tube In 1/4 Ullek cotton batting 01 other mofl pddlng material. 2) Wrap the above in heavy kralt papr. 3) h c k In P rlgld mntnlner which 18 at leist 4 Inches larger than the tube in each dlmemlon.

14、 4) Lrround the tube withit least four inches ofpelvdereelslar or 8lmllar shoekabsorblng material. BE certain that thepaeking la Oght all around the lube. 5) Tvbes returned from outside the cantlnental United Statell should be packed in a wooden box. 6) ShlpprepPldpreferrbly by AIR FRElGHTor RAlLWAY

15、 EXPRESS. We do not recommend parcel post or air parcel PSI shlpment. CRT WARRANTY CLAIM FROM: DATE: - NAME: COMPANY: ADDRESS: Perm to Contact for further 1nlormnt1on: NAME: TITLE: COMPANY: ADDREW _ To process your dalm qvleUg please enter the lnlormtlon lndlcated below: 1) INSTRUMENT MODEL 8ERuL 2)

16、 TUBETYPE SERIAL 3) ORlGINAL TUBE REPLACEMENT TUBE 4) YOUR PURCHASE ORDER NO. 5) DATE PURCAA8ED 6) PURCNA8ED FROM 7) COMPLAmT (Please describe nature of trouble) 6) OPERATING CONDITIONS: (Please describe condlUo prior to nnd at time of fallure - HEWLETT-PACKARD CO. PAGE MILL ROAD, PAL0 ALTO. CALIF.

17、U.S.A. Figure 1-2. Cathode-Ray Tube Warranty 1- 2 01526-2 Model 175A Section I Table 1-2 Model Name 1750A Dual Trace Vertical Amplifier 1751A Single Channel Amplifier 1752A High Gain Vertical Amplifier 1752B High Gain Vertical Amplifier Table 1-2. Plug-In Units and Accessories Description Dual-trace

18、 and differential display, 0.05 v/cm to 20 v/cm sensitivity, less than 9-nsec rise time, dc to 40 mc bandwidth DC to 50 mc bandwidth, less than 7-nsec rise time, 0.05 v/cm to 20 v/cm sensitivity Single channel or dual-input differential display, 5 mv/cm to 20 v/cm sensitivity, dc to 18 mc bandwidth

19、from 5 mv/cm to 20 mv/cm range, dc to 22 mv bandwidth from 50 mv/cm to 20 v/cm range. Single channel or dual-input differential display, 5 mv/cm to 20 v/cm sensitivity, dc to 40 mc bandwidth innormal mode, dc to 30 mc bandwidth in X10 mode. 1754A Four Channel Amplifier 1780A Auxiliary Plug-In 1781B

20、Sweep Delay Generator 1782A Display Scanner 1783A Time Mark Generator 196B Oscilloscope Camera 1115A 1116A Testmobile 1117A 10035A Tip Assortment Kit 10175A/B Viewing Hood (AC- 83A) 10003A/B Voltage Probe (AC-21M) (2 supplied with Model 175A Oscilloscope) 10002A/B Voltage Probe (AC-2 1C) 10025A Low

21、Frequency (AC-21J) Probe Single or multiple channel operation, 50 mv/cm to 20 v/cm sensitivity, dc to 40 mc bandwidth, less than 9-nsec rise time. Single or normal sweep, manual or external arming. 0 to 10 cm of sweep delay. Will trigger or arm main sweep. Display controlled by main sweep or delayin

22、g sweep for all part of trace. Delaying sweep rate 2 psec/cm to 1 sec/cm. Provides output to operate conventional X-Y recorder. Includes pen- stabilizer for nearly constant writing rate. At least 30-mc bandwidth with 40 mc vertical plug-in unit. Provides intensity modulating time markers synchronize

23、d with sweep. Marker intervals 0.1, 1, or 10 psec. Makes permanent record of oscilloscope trace on quick-developing Polaroid- Land film. Clamps quickly to oscilloscope bezel. Oscillo- Reptar fully corrected f/l. 9 lens. Alphax #3 shutter, 1/100 to 1 second. Includes ultraviolet light silhouette inte

24、rnal graticule of crt. Model 10351A Carrying Case available. Holds oscilloscope in convenient position for viewing display. Tilts instrument so that display can be viewed from various angles. Kit contains a pincer jaw, banana tip, pin tip, hook tip, and sprint tip and provides maximum versatility wh

25、en used with 10002A/B or 10003A/B Probes Shades crt screen from surrounding light sources. Model 10175A had polarized light filter. High-impedance test probe with flange-operated jaws and approximately 4 feet of shielded cable matched to oscilloscope input. Division ratio 1O:l input impedance approx

26、imately 10 megohms shunted by 10 pf. Maximum voltage rating 600 volts peak. High-impedance test probe with flange-operated jaws and approximately 5 feet of shielded cable matched to oscilloscope input. Division ratio 50:l input impedance approximately 9 megohms shunt by approximately 2.5 pf. Maximum

27、 voltage rating 1000 volts peak. Provides straight-through connector to oscilloscope from circuit test points. Pushbutton operated jaws. Shunt capacity approximately 150 pf. Cable approximately 5 feet long. Requires BNC to binding post adapter Model lOllOA or equivalent. 01526-2 1-3 1. Section I Par

28、agraphs 1-9 to 1-16 1-9. SPECIAL FEATURES. 1-10. Special features of the Model 175A include the Hewlett-Packard internal-graticule crt, PRESET triggering, BEAM FINDER, and a cabinet which serves both bench- and rack-mount requirements. Optional plug-in units are provided for both the ver- tical and

29、the time axis. The main vertical amplifier rise time is less than 7 nanoseconds which provides maximum versatility for present and future plug-ins. 1-11. CATHODE-RAY TUBE. 1-12. The crt used in the Model 175A is a multi-grid 12-kvpost-accelerator type with the internal grati- cule which eliminates p

30、arallax, and an aluminized phosphor. The gun structure provides a large 6 x 10 cm distortionless viewing area as well as ex- tremely high deflection-plate sensitivity. 1-13. SPECIAL CONTROLS. 1-14. Special panel controls make the Model 175A easy to operate. With SWEEP MODE in PRESET, the sweep will

31、synchronize internally on nearly all signals. BEAM FINDER enables the operator to locate the beam when it is off screen. SWEEP MAGNIFIER increases the maximum sweep rate to 10 nsec/cm, calibrated in all positions. Model 175A 1-15. AMBER FILTER. 1-16. An amber filter ( Stock No. 120A-83A) is supplied

32、 with each oscilloscope which has a type P7 phosphor crt. The filter, when installed over the face of the crt, improves visual observation of dis- plays such as single-shot phenomena or very low frequency applications. The filter provides the long persistency characteristics desired for observation

33、of displays of this type. To install the filter, pro- ceed as follows: a. Remove front panel crt bezel. b. Set filter into bezel, aligning larger rectangular slots in edge of filter with guide metal posts on bezel casting. c. Remove oscilloscope top cover. d. Loosen clamp at socket of crt. e. Carefu

34、lly push CRT toward rear of instrument to provide clearance for thickness of installed filter (about 1/8 inch), f. Replace bezel with filter and tighten bezel screws. g. Slide crt forward until light mask on front of crt just touches filter. h. Tighten clamp to keep crt from turning; do not over-tig

35、hten clamp or tube damage may result. i. Obtain a free running trace and then adjust TRACE ALIGNMENT until trace is aligned with horizontal lines of graticule. 1-4 Model 175A SECTION II INSTALLATION Section 1 1 Paragraphs 2- 1 to 2- 18 2-1. INCOMING INSPECTION. 2-2. MECHANICAL INSPECTION. 2-3. Upon

36、receipt of your Model 175A, check the contents of the shipment against the packing list and inspect the instrument for any obvious damage re- ceived in transit. See warranty sheet at the back of this manual. Keep the packing material until per- formance check has been successfully completed. 2-4. PE

37、RFORMANCE CHECK. 2-5. Check the performance of the Model 175A by making the tests outlined in paragraph 5-5 of this manual. Use this check to verify all listed specifi- cations and also as part of an incoming quality-control inspection. Instructions for the plug-in units will be found in the individ

38、ual manuals for these instru- ments. 2-6. INSTALLATION. 2-7. The Model 175A is packaged in the new Hew- lett-Packard cabinet, suitable for bench or rack mount. Top and bottom covers may be removed for easy accessibility to internal parts and adjustments. 2-8. RACK MOUNTING. 2-9. Parts necessary for

39、rack mounting are pack- aged with the instrument. Proceed as follows: a. Remove tilt stand. b. Remove feet (press foot-release button). c. Remove adhesive-backed trim strip from sides. d. Attach filler strip along bottom edge of front e. Attach mounting flanges to sides with larger panel. notch towa

40、rd bottom of instrument. f. Mount in standard 19-inch rack (mounting screws not supplied). Note Rear support must be supplied to the rack- mounted instrument if it is to be subjected to mechanical vibrations. 2-10. COOLING. 2-11. The air filter in this instrument must receive an oil coat before the

41、instrument is placed in normal use to prevent excessive dirt from entering instrument case. Recommended is Research Products Company No. 3 Filter Coat. This adhesive is available in “Handi-Koter” sprayer cans at most heating-supply stores or through your Hewlett-Packard field sales engineer. 0 15 26

42、- 1 2-12. The cooling fan and air filter are located at the rear of the Model 175A. Leaveat least two inches of clearance behind the instrument for the free move- ment of air. In rack installations be sure that the recirculation of warm air within the rack cabinet does not result in high ambient tem

43、perature. Inspect the air filter periodically and clean it as soon as it ap- pears to be reducing the flow of cooling air. See section V for cleaning instructions. 2-13. POWER REQUIREMENT. 2-14. The Model 175A operates on 115 or 230 volts *100/0, 50 to 60 cps. Power required depends upon the plug-in

44、s used, but will not exceed approximately 425 watts. Before connecting the instrument to the power source, be sure that the 115-230 switch on the rear panel is in the correct position, and that the proper fuse is installed (see section VI). CAUTION Connecting to a 230-volt source with the switch in

45、the 115-volt position can result in damage to the instrument. 2-15. SAFETY POWER CABLE. 2-16. To protect operating personnel the National Electrical Manufacturers Association (NEMA) rec- ommends that the instrument panel and cabinet be grounded. This instrument is equipped with a three- conductor po

46、wer cable which grounds the instrument when plugged into an appropriate outlet. The offset round pin on the power-cable three-prong connector is the ground pin. To preserve the protection feature when operating the instrument from a two-contact outlet, use a three-prong to two-prong adapter and conn

47、ect the green pigtail on the adapter to ground. 2-17. REPACKAGING FOR SHIPMENT. 2-18. To repack the Model 175A for shipment, always use the best packaging methods available. If the original container with its packing pads and fillers is not on hand, consult your nearest Hewlett-Packard sales office

48、for packing materials or instructions. The following steps are a general guide: a. Wrap the instrument in heavy paper. b. Protect the panel with cardboard strips. c. Use a strong cardboard or wooden box. d. Use ample packing material around all sides of e. Seal with heavy tape or metal bands. f. Mar

49、k the container “Fragile - Delicate Instru- ment”. the instrument. 2- 1 Section III Model 175A Figure 3-1 p OCCURRENCE / 0 0 1. 2. 3. 4. 5. 6. 7. 8. 9. POWER switch and indicator light. The 115- 230-volt switch is located on rear panel. CALIBRATOR, Provides 1-volt and 10-volt square waves for calibration purposes. TRACE ALIGNMENT. Rotates traces to align it with hori