HP-162B-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 01 558-1 Printed: MAR 1963 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 I H/P Part No. 162B-901 MODEL 162B AND S

2、PECIFICATION H02-162B SERIAL PREFIXED: 251- DUAL TRACE VERTICAL AMPLIFIER HEWLfTl-PACKAID COMPANY RadioFans.CN 收音机爱 好者资料库 8 MANUAL CHANGES 228-00126 to 00150 228-00101 b 00125 P i MODEL 162B C102 should be +UP. Page 5-7, Paragraph 5-34, Step h. should read Step j. should read Page 5-10, Figure 5- 9,

3、 C126, C226: Change value t o 3.3 PF. Section VI, Replaceable Parts C126, C226: Change Stock No. t o 015010059. Channel A POLARITY. . . . -UP* Channel A POLARITY. . . . +Up* Page 5-11/5-12, Figure 5-10, Section VI, Replaceable Parts, Change both VERNIER circuits 88 shown below in Figure 1 . H02- 162

4、B e: 162B and H02-162B: V101-103, 201-203, 301-303: Change t o tube type 7308, Stock No. 1932-0032. Add 5104, NSR, part of Rl23. Add 5204, NSR, part of R223. PIN 3 ,TO V202B YEL PIN 8 4/29/64 Supplement B for RadioFans.CN 收音机爱 好者资料库 Model 162B Contents TABLE OF CONTENTS Section page Section page I G

5、ENERALINFORMATION . 1-1 V Nz4INTENANCE . 5 . 1 1 . 1 . Description and Purpose . 1-1 5 . 1 . Introduction . 5-1 1 . 4 . Instrument Identification . 1-1 5 . 3 . Performance Check . 5-1 5 . 6 . Preliminary Procedure . 5 . 1 5 . 7 . Single Channel Operation . 5-2 II INSTALLATION . 2 . 1 2 . 1 . Incomin

6、g Quality Control Inspection . 2 . 1 2 . 4 . Storage and Reshipment . 2 . 1 2 . 6 . Installation . 2-1 I C I OPERATINGINSTRUCTIONS . 3 . 1 3 . 1 . Introduction . 3-1 3 . 3 . Controls . 3 . 1 3 . 1 2 . Single Trace Operation . 3-2 3 . 1 4 . Dual Trace Operation . 3-2 3 . 1 8 . Differential Operation

7、. 3-2 3 . 2 0 . Input Considerations . 3-2 IV PRINCIPLES OF OPERATION . 4-1 4 . 1 . Introduction . 4-1 4 . 3 . Circuit Details . 4-1 4 . 1 3 . Electronic Switch . 4-2 5 . 8 . 5 . 9 . 5 . 1 0 . 5 . 1 1 . 5 . 1 2 . 5 . 1 3 . 5 . 1 4 . 5 . 1 5 . 5 . 1 6 . 5 . 2 2 . 5 . 2 6 . 5 . 3 0 . 5 . 3 2 . 5 . 3 3

8、 . 5 . 3 4 . 5 . 3 5 . 5 . 3 6 . 5 . 3 7 . Alternate Operation . 5-2 Chopped Operation . 5-2 Sensitivity Calibration . 5-2 Vertical Position Range . 5-2 Dynamic Range . 5-3 Common Mode Rejection . 5-3 Rise Time . 5-3 Bandwidth . 5-3 Troubleshooting . 5-3 Repair . 5 . 4 Adjustment . 5-6 Preliminary S

9、ettings . 5-6 Vertical Position . 5-6 Gain . 5 . 6 Amplifier Input Capacitance . 5-7 Attenuator Compensation . 5-7 Attenuator Input Capacitance . 5-7 Pulse Response . 5-8 VI REPLACEABU PARTS . 6 . 1 6 . 1 . Introduction . 6-1 6 . 4 . Ordering Information . 6-1 LIST OF ILLUSTRATIONS Number Title page

10、 Model 162B Dual Trace Vertical Amplifier . 1-0 1 . 1 . 3 . 1 . Control Location . 3 -3 3 . 2 . Bal . and Sens . Cal . Adjustment . 3-4 3 . 3 . Single Trace Operation . 3-5 3 . 4 . Dual Trace Operation . 3-6 3 . 5 . A-B Operation . 3-7 4 . 1 . Dual Trace Amplifier Block Diagram . . 4-0 4 . 2 . Atten

11、uator Simplified Schematic . 4-0 4 . 3 . Amplifier Simplified Schematic . 4-1 4 . 4 . Constant Current Generator . 4-2 4 . 5 . Electronic Switch . 4-3 Number Title page 5 . 1 . 5 . 2 . 5 . 3 . Parts Location. Top . 5-5 5 . 4 . Parts Location. Left Side . 5-5 5 . 5 . Amplifier Input Capacitance Adjus

12、tment Location . 5-6 5 . 6 . Attenuator Compensation 5 .7 . Adjustment Location . 5-8 5 . 8 . Pulse Response Adjustment Location . 5-8 5 . 9 . Attenuator Schematic . 5-10 5 . 1 0 . Amplifier Schematic . 5-11 Parts Location. Channel A Attenuator . . 5-4 Parts Location. Channel B Attenuator . . 5-4 Ad

13、justment Location . 5-7 Attenuator Input Capacitance LIST OF TABLES Number Title page Number Title page 1 . 1 . Specifications . 1-1 5 . 4 Unbalance 5-4 Attenuator Input Capacitance . 5-8 5 . 1 . Recommended Test Equipment . 5-1 5 . 2 . Sensitivity Calibration . 5-2 6 . 1 Reference Designation Index

14、 6-2 5 . 3 . Trouble Localization . 5-3 6 . 2 Replaceable Parts 6-9 . . 5 . 5 . Recommended Adjustments Following Tube or Diode Replacement . 5-5 5 . 6 Attenuator Compensation 5-7 5 . 7 . . . 3 . 1 Pulse Width vs Sag 3-1 . . . . . . 01558-1 iii Model 162B Section I Figure 1-1. Model 162B Dual Trace

15、Vertical Amplifier 1-0 01558-1 Model 162B Section I Paragraphs 1-1 to 1-5 1-1. DESCRIPTION AND PURPOSE. SECTION I GENERAL INFORMATION 1-2. The Hewlett-Packard Model 162B Dual Trace Vertical Amplifier is a wide-band vertical amplifier designed to be used with the Models 160B and 170A Oscilloscopes. I

16、t provides calibrated sensitivity with 30 megacycle bandwidth and provides the capability of viewing two traces simultaneously. The two channels may also be combined in differential operation, with the difference signal displayed. 1-3. The information in this manual also applies to the Specification

17、 H02-162B) which is identical to the Model 162B except that all tubes and semiconductors Table 1-1. are MIL approved types. Bothunits meet the environ- mental requirements of MIL-E-16400. 1-4. INSTRU MEN1 ID ENTl FlCATl ON. 1-5. Hewlett-Packard instruments use an eight-digit, two-section serial numb

18、er. The first three digits form C i s . serial prefix, which remains the same until a change is made in theinstrument. If the serial pre- fix on your instrument does not agree with that shown on the title page of this manual, change sheets will describe differences between your instrument and this m

19、anual. Specifications MODE OF OPERATION 1. Chznnel A alone. 2. Cbnnel B alone. 3. Channels A and B displayed on alternate sweeps. 4. ChanneLg A and B displayed by electronic switching at 200 kc rate, with blanking during switching. 5. Channel A minus Channel B (differentia! input). EACH CHANNEL Sens

20、itivity Range: 0.05 v/cm to 20 v/cm. Nine calibrated ranges in 1, 2, 5, 10 sequence. Ver- nier extends minimum sensitivity to at least 50 v/ cm and provides continuous adjustment between ranges. A sensitivity calibration adjustment for each channel is provided on the instrument front panel. Attenuat

21、or Accuracy: *3% Pass Band: In 17OA-DC coupled dc to 30 mc. AC coupled: In 160-DC coupled: dc to 15 mc. AC coupled: 2 cps to 30 mc. 2 cps to 15 mc. Rise Time: Less than 12 nsec in 170A, and 23 nsec in 160B. Dynamic Range: Input amplifiers may be over- loaded by 18 cm signal without causing noticeabl

22、e signal distortion. Vertical Position Control Range: *9 cm. Input Impedance: 1 megohm (nominal) shunted by 28 pf. Input Capacitor Rating: 600 vdc Polarity of Presentation: + up or - up, selectable. DIFFERENTIAL INPUT Both inputs, with their associated attenuators, may be switched to one channel to

23、give differen- tial input. The input attenuators may be set separately to allow mixing signals of different levels. Common Mode Rejection: At least 40 db at max- imum sensitivity up to 1 mc, or 30 db when using attenuators. GENERAL Weight: Net 5 lb. Power: Supplied by Model 160B/170A Oscilloscopes.

24、Accessories Available: lOOOlA Probe, 1O:l divider (2 supplied with lOOOlB Probe, 1O:l divider, 10 feet (3.05m)long 10002A Probe, 50:l divider. 10002B Probe, 50:l divider, 10 feet (3.05m) long lOllOA Adaptor, binding post to male BNC 160B/170A Oscilloscope). cable. cable. 01556-1 1-1/1- 2 Model 162B

25、. Width (sec.) .001 .002 ,005 .01 .02 .05 .1 % SAG 12 5 9 18 39 63 SECTION II INSTALLATION Section I X and 1 1 1 Paragraphs 2-1 to 3-6 2 -1. INCOMING 0 U ALlTY CO NT R 0 L INSPECTION. 2-2. MECHANICAL INSPECTION. Upon receipt of your Model 162B, unpack it, check the contents against the packing slip

26、and inspect the instrument for mechan- ical damage. If the instrument is damaged in any way, notify the carrier immediately (refer to the warranty on the inside back cover of this manual). Your local Hewlett-Packard Engineering representative is pre- pared to give you assistance with any problem inv

27、olving this instrument and its application. 2-3. PERFORMANCE CHECK. Make the perform- ance check as outlined in paragraph 5-3 of this manual. 2-4. STORAGE AND RESHIPMENT. 2-5. Following is a general guide for repackagingan instrument for storage or reshipment. If there are any qwstions involving the

28、 packaging materials to be used, contact an authorized Hewlett-Packard Engineering representative. a. Wrap the instrument in heavy paper or plastic before placing it in the shipping container. b. Use plenty of packing material around all sides of the instrument and protect panel faces with card- boa

29、rd strips. c. Use a heaty cardboard cartan or wooden box to house the instrument and use heavy tape or metal straps to seal the container. d. Mark the packing box, TRAGXLE-DELICATE INSTRUMENT . 2-6. INSTALLATION. 2-7. The Model 162B is designed to be plugged into the vertical amplifier compartment o

30、f the Models 160B or 170A Oscilloscope. To install the Model 162B, slide it into the vertical amplifier compartment and lock it into place with the LOCK knob on the front panel. All necessary connections between the Model 162B and the Model 160B/170A are automatically completed. SECTION 111 0 PER AT

31、1 N G 3-1. INTRODUCTION. 3-2. The Model 162B may be used in five modes, selectable by a front panel control. The five modes are: Channel A only, Channel B only, Channels A and B on alternate sweeps, Channels A andB chopped on the same sweep, and Channel A minus Channel B (differential mode). Each ch

32、annel has a polarity switch, position control, and attenuator with contin- uous vernier. 3-3. CONTROLS. 3-4. The front panel control locations are shown in figure 3-1. The controls for each channel have identical locations, therefore only the controls for Channel A are identified. 3-5. AC-DC. The AC

33、-DC switch selects either direct or capacitive coupling of the input signal. The AC position is useful for observing small ac signals superimposed on a high dc ievel, such as power supply ripple. In the DC position the amplifier is direct-coupled, allowing accurate measurements of dc or low-frequenc

34、y ac signals. The lower -3db 01558-1 I NSTRUCTI 0 N S frequency in the AC position is 2 cps; if square waves or pulses of long duration are to be observed without sag, the DC position should be used. Table 3-1 shows the percentage of sag for various pulse widths. Note In the AC position the attenuat

35、or accuracy as specified in table 1-1 is retained to approximately 20 cps. 3-6. SENSITIVITY. The SENSITIVITY control is calibrated in volts/cm; if the VERNIER control is in the CALIBRATED position, the trace height may be read directly in volts. 2- 1 3- 1 Section 1 1 1 Paragraphs 3-7 to 3-23 Model 1

36、62B 3-7. VERNIER. The VERNIER control provides continuous adjustment of the deflection sensitivity, and allows the display to be set to any arbitrary height. Minimum sensitivity can be set to at least 50 v/cm. 3-8. SENS. CAL. This front panel screwdriver adjustment allows the calibration of the Mode

37、l 162B to be set using an external voltage standard or the calibrator of the Model 160B/170A. A step-by-step procedure for this adjustment is outlined in figure 3- 2. 3-9. BAL. The BAL. control balances the amplifier so that no vertical shift of the trace occurs when the VERNIER control is operated.

38、 A step-by-step pro- cedure for BAL. is outlined in figure 3-2. 3-10. VERTICAL POSITION. The VERTICAL POS- ITION control has a range of *9 cm., so that offscreen portions of the trace may be brought into view. 3-11. POLARITY. The POLARITY switch reverses the polarity of the trace on the screen. Thus

39、, in the -UP position, a negative voltage causes an upward deflection. 3-12. SINGLE TRACE OPERATION. 3-13. The vertical presentation switch allows selec- tion of either Channel A or Channel B for presentation on the screen. For step-by-step operating procedure, refer to figure 3-3. 3-14. DUAL TRACE

40、OPERATION. 3-15. The vertical presentation switch also selects either of two modes of dual trace operation, CHOPPED or ALTERNATE. For step-by-step operating pro- cedure refer to figure 3-4. 3-16. CHOPPED. In this mode of operation the two channels are electronically switched at approximately 200 kc

41、on a single sweep. Accurate time difference or phase comparisons may be made in this mode, since both signals occur on the same sweep. However, this mode is intended to be used where the input frequency is much lower than the rate at which the channels are switched. 3-17. ALTERNATE. In this mode the

42、 two channels are presented on alternate sweeps. For accurate time or phase comparisons, use an external triggering signal. 3-18. DIFFERENTIAL OPERATION. 3-19. Since both inputs are fed to the Channel A amplifier in this mode of operation, only the difference between the two inputs will be displayed

43、 on the screen. Therefore any signal on both channels which is equal in phase and amplitude (common mode signal) will be rejected. Use differential mode where measurements are made in the presence of hum or other unwanted pickup. A step-by-step operating procedure for A-B . is outlined in figure 3-5

44、. . Note For greatest rejection of common-mode sig- nals, set both channels to the same sensitivity. 3-20. INPUT CONSIDERATIONS. 3-21. ACCESSORY PROBES. To preserve the band- width capabilities of the Model 162B, certain precau- tions must be observed. To avoid circuit loading and resultant waveform

45、 distortion, accessory probes may be used to increase the input impedance. The lOOOlA Probe supplied with the Model 160B/ 170A Oscilloscope presents an input of 10 megohms shunted by 10 pf and may be used over the 30 megacycle bandwidth of the Model 162B. When using the probe multiply the SENSITIVIT

46、Y setting by 10. 3-22. When using the lOOOlA (AC-21A) or other accessory probes, it is necessary to compensate the probe for the input impedance of the amplifier. With- out compensation, the probe will not divide accurately at high frequencies and waveforms will be distorted. For compensation adjustment refer to the lOOOlA (AC-21A) operating note. 3-23. AMPLIFIER OVERLOAD CAPABILITY. In certain situations it may be desired to observe with increased sensitivity a small part of a waveform. A signal as large as 18 c