HP-196A-Manual 电路图.pdf

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 H T-PACKARD COMPANY 196, L OSCILLOSCOPE CAMERA RadioFans.CN 收音机爱 好者资料库 O P E R A T I N G A N D S E R V I C I N G M A N U A L MODEL 196A SERIALS PREFIXED: 001- OSCILLOSCOPE CAMERA Copyright H E W L E T T - P A C K A R D C O M P A N Y 1961 1501 P A G E MILL R O A D , P A L 0 A L T O , C A L I F O R N I A , U.S.A. RadioFans.CN 收音机爱 好者资料库 Model 196A Table of Contents List of Illustrations and Tables TABLE OF CONTENTS Section Page I INTRODUCTION AND DESCRIPTION 1-1 1 . 1 . Introduction . 1-1 1 . 5 . Description . 1-1 11 111 PREPARATION FOR USE . 2-1 2 . 1 . Incoming Inspection . 2-1 2 . 5 . Preparation for Reshipment . 2-1 2 . 7 . Storage . 2-1 2 . 9 . Environmental Limits . 2-1 2 . 1 1 . Accessories Available . 2-2 OPERATING INSTRUCTIONS . 3 . 1 . Introduction . 3 . 4 . Mounting Instructions . 3 . 6 . Camera Controls . 3 . 1 1 . Film Loading . 3 . 1 3 . Film Types . 3 . 1 5 . Exposure Settings . 3 . 2 0 . Intensity Settings . 3 . 2 2 . Graticule Exposure . 3 . 2 4 . Parallax . 3 . 2 6 . Film Developing . 3 . 2 8 . Scale Measurements . 3 . 3 0 . Multiple Exposures . 3 . 3 2 . Specialized Techniques . 3 . 3 6 Summary 3- 1 3- 1 3- 1 3- 1 3- 1 3-6 3-6 3-7 3-7 3-7 3-7 3-7 3-7 3- 10 3-10 Section Page IV PRINT EVALUATION . . . . . 4-1 4 . 1 . Introduction . 4-1 4 . 3 . Fogging . 4-1 4 . 9 . Typical Problems . 4-1 4 . 7 . Film Tearing . 4-1 V VI THEORY OF OPERATION . 5-1 5 . 1 . General . 5-1 5 . 3 . Lens . 5-1 5 . 5 . I?ara.llax . 5-1 5 . 8 . Depth of Field . 5-2 5 . 1 1 . Film Processing . 5-2 REPAIR AND ADJUSTMENT . 6-1 6 . 1 . Maintenance . 6-1 6 . 5 . Repair . 6-1 6 . 7 . Adjustment . 6-1 6 . 9 . Special Equipment Required . . 6-1 6 . 1 1 . Test Equipment . 6-3 6 . 1 3 . Changing the Image-to-Object Ratio . 6-3 6 . 1 6 . Refocusing . 6-4 VII REPLACEABLE PARTS . 7-1 7 . 1 . Introduction . 7-1 7 . 4 . Ordering Information . 7-1 LIST OF ILLUSTRATIONS Number Title Page 1 . 1 . Model 196A Oscilloscope Camera . 1-0 1 . 2 . Model H01 196A Oscilloscope Camera . 1-0 2 . 1 . Operational Check . 2-0 2 . 2 . Accessories Available . 2-2 Number Title Page 4 . 1 . Print Evaluation . 4-1 5 . 1 . Camera Operation . 5-0 5 . 2 . Parallax Effects . 5-1 5 . 3 . Aperture Effects on Depth of Field . 5-2 6 . 1 . Special Focus Setup . 6-1 3 . 1 . Camera Controls . 3-2 6 . 2 . Lens Centering Plate . 6-1 3 . 2 . Film Loading . 3-4 6 . 3 . Exploded View, Maintenance . 6-2 3 . 3 . Exposure Adjustment Guide . 3-6 6 . 4 . Image-to-Object Change Detail . 6-4 3 . 5 . Effects of Prefogging . 3-10 7 . 1 . Exploded View, Replaceable Parts . 7-0 3 . 4 . Film Developing . 3-8 LIST OF TABLES Number Title Page 1 . 1 . Specifications . 1-1 3 . 1 . Basic Expmure Guide . 3-6 3 . 2 . Summary . 3-10 7 . 1 . Replaceable Parts . 7-1 01038- 1 iii Section I Figure 1-1 Model 196A Figure 1-1. Model 196A Oscilloscope Camera Figure 1-2. Model H01 196A Oscilloscope Camera 1-0 01038- 1 Model 196A Section I Paragraphs 1-1 to 1-9 SECTION I INTRODUCTION A N D DESCRIPTION 1-1. INTRODUCTION, 1-2. SCOPE. This manual supplies operation and maintenance information for the Hewlett-Packard Model 196A Oscilloscope Camera. An operating in- structions section (section 1 1 1 ) and a print evaluation section (section IV) are included for the operators use in evaluating many of the problems that occur in oscilloscope photography. 1-3. MODELS COVERED. There are two models covered in this manual: Model 196A, in which the shutter is manually operated (figure 1-1), and H01196A (figure 1-2), in which the shutter may be either manu- ally operated or remotely operated by actuating a relay in the camera. In the case of remote operation, an external Power source is required (see paragraph 3-10). With the exception of the shutter actuating system, these cameras are identical. 1-4. SERIAL NUMBER SYSTEM. Hewlett-Packard instruments use a two section, eight digit serial num- ber (Le. 000-00000). The first three digits are an identification number; the last five digits are the in- strument serial number. If the identification number on the instrument does not agree with the identification number shown on the manual title page, there are differences between the manual and your instrument. These differences are described in Manual Changes sheets supplied with the manual. 1-50 DESCRIPTION. 1-6. GENERAL. The 196A Oscilloscope Camera is a high quality camera for use in permanently recording oscilloscope traces at all sweep speeds. The 196A has been designed so that when the camera nose is mounted against the oscilloscope graticule, the camera will be in perfect focus on the trace. Image-to-object ratio is normally 0.9-to-1, allowing the entire 10 cm wide graticule to be photographed. A 1-to-1 ratio is available on special order, however, or may be ob- tained by modification in the field (see paragraph 6-13). Your Model 196A Oscilloscope Camera arrives fully assembled and, with the exception of film, ready for use. Film may be obtained at an photographic supply store. Use regular Polaroid6 Land film types 42, 46L or 47. 1-7. LENS. The 196Auses an extremely high quality Wollensak Oscillo-Raptar 75 mm f/l. 9 lens with addi- tional edge resolution, resulting in very low distortion even at the picture edge. This allows accurate scale measurements to be made on the positive print. 1-8. MULTIPLE EXPOSURES. Multiple exposures are often desirable to either compare signals that differ slightly during adjustments, etc., or as a mea- sure to conserve film when attempting to determine correct exposure for specialized conditions. Multiple exposures are possible on the 196A by simply turning a control on the side of the camera which moves the lens through 11 detented positions on a vertical plane parallel with the film. The shutter may be actuated on each position. 1-9. FILM DEVELOPMENT. Film processing is automatically started by pulling the film tab on the right side of the camera back and advancing the film one frame. The 196A is designed with a stationary back to further simplify this procedure. A timer is provided on the right side of the camera for your con- venience in timing film development. Refer tosec- tion 1 1 1 for complete instructions for taking pictures. Table 1-1. Specifications OBJECT-TO-IMAGE RATIO LENS: FOCUS: LENS OPENING: SHUTTER PRINT SIZE: FILM DIMENSIONS: WEIGHT: ACCESSORIES AVAILABLE: 1 to 0.9; available with 140-1 ratio 3 in.(75 mm) f/I. 9 Oscillo-Raptar Factory adjusted for CRT face 5/16 inch behind front surfaces; may be adjusted for other distances f/l. 9 to f/16 Alphax#3; Time, Bulb, 1/100, 1/50, 1/25, 1/10,1/5, 1/2, lsecond 2-7/8 inches x 3-13/16 inches (7.3 cm x 9.6 cm) Polaroid Land film types 42, 46L and 47 13-1/2 inches long, 9-1/4 inches high, 10 inches wide Net 9 lbs, shipping 18 lbs (32 lbs in carrying case) 196A-45 carrying case; 196A-20 Tektronix adapter 01038- 1 1-1 - w -5 relieving the pressure will close the shutter. In T position, actuating the shutter release once will open the shutter, actuating it again will close the shutter. a. Loosen the thumbscrew on the toggle clamp and the knurled lockingscrews on either side of the clamp ring assembly. b. Lift up on the thumbscrew to make sure the toggle clamp is unlocked. c. Push the camera housing forward so that the camera nose is against the oscilloscope graticule. This is extremely important in preventing light leakage. 3-10. SHUTTER RELEASE. There are two models of the 196A (figures 1-1 and 1-2) providing two dif- ferent methods of actuating the shutter. One (Model 196A, figure 1-1) utilizes the conventional cable re- lease system. The other (Model H01 196A, figure 1-2) utilizes a relay which may be either manually or elec- trically operated. Relays of several different voltage ratings are available. d. Slide the clamp ring forward to seat against the oscilloscope bezel shoulder. 3-11. FILM LOADING. MP- S- 754 I Figure 3-4. Film Developing (Sheet 1 of 2) 3-8 01038- 1 Section III Figure 3-4 Model 196A STEP 6 When the timer buzzing stops, open the picture door by sliding the latch to the left. STEP 7 Remove the finished print starting with the cutout area on the right side of the positive print. STEP 8 Close and lock the picture door. STEP 9 Flatten the print by drawing it over a table edge. Coat the entire surface of the print using 6 to 8 overlapping strokes of the Print- coater supplied with each roll of film. Note: 1) When taking transparencies (type 46L) be sure to treat them with #646 Dippit within an hour after removal from the camera. Follow directions supplied with the film and the Dippit carefully. 2) Wipe the back of the bridge and the two steel rollers clean with a damp cloth after the completion of each roll. / LATCH -. , PICTURE DOOR PRINT MP-S-755 Figure 3-4. Film Developing (Sheet 2 of 2) 01038- 1 3-9 Section I I I Paragraphs 3- 32 to 3- 37 Model 196A 3-32. SPECIALIZED TECHNIQUES, 3-33. GENERAL. The preceding instructions will be sufficient in most cases to obtain good results in your oscilloscope photography. The recording of fast tran- sients, however, will often require specialized treat- ment to render the trace visible. 3-34. PREFOGGING. Figure 3-5 shows the results of prefogging which is the controlled pre-exposure of the film prior to taking the actual picture. This in- creases the sensitivity of the film by a factor of 2 or 3, which makes this technique ideal for reproduction of high speed transients. To prefog film, proceed as follows : a. Laya piece of white bond on a flat surface. Nor- mal room light should be used. b. Set the camera lens for 1/100 at f/16 for Type c. Hold the camera about 18 inches from the paper 47 film. and actuate the shutter. d. Reinstall the camera on the oscilloscope, and take the picture of the transient in the usual manner. MP-S-819 Figure 3-5. Effects of Prefogging 3-35. TRANSILLUMINATION. If parts of the tran- sient are not readable on the print, holding it over a 100 watt light bulb will render it much more readable. Another idea is to glance at the negative immediately after removal of the print. Although it will fograpidly in room light, valuable information is often available. 3-36. SUMMARY. 1 3-37. Table 3-2 gives a complete summary plus ap- propriate paragraph references for taking pictures with the 196A Oscilloscope Camera. Table 3-2. Summary - Step - 1 2 3 4 5 6 7 8 9 10 11 12 Procedure Remove lens cap and inspect lens for dirt, smudges, etc. Install 196A on oscilloscope. Make sure cameranose is seated against the graticule. Determine the type of film needec Load film Determine basic shutter speed/ aperture setting Find required shutter speed and determine final aperture setting. Adjust these controls. Shut the lens access door Adjust oscilloscope intensity for comfortable viewing with no blooming. Set oscilloscope focus Close viewer door and actuate shutter Develop picture for recom- mended time Coat positive print Clean camera lens (if neces- sary) and replace lens cap 3ef erencc par. 3-3 par. 3-4 par. 3-1: fig. 3-2 par.3- 15 to par.3-19 par.3-20 par. 3- 26 and fig. 3-4 par. 3-3 3- 10 01038- 1 Model 196A. Refer to Paragraph Picture Received Picture Desired Cause Camera nose not mounted 3-4 against the graticule. Note fogging and reduced graticule size. d Section IV Paragraphs 4-1 to 4- 10 SECTION IV PRINT EVALUATION 4-1. INTRODUCTION. 4-2. This section contains information for your use in correcting any problems yau may have in oscillo- scope photography. In each we, reference i s made t o the particularparagraph ineectionm that will offer more detailed instruction8 on how to prevent these difficulties. 4-4. GENERAL. Fogging i s the objectionable light areg over either ,part of, or t h e whole print. Many different factor6 can be respaneible for fogging, but in most cases they can be corrected with Uttle diffi- culty. TWQ main causes are UBtedbelow. 4-6. INTERNAL8WRCES. Most cases o f toggiaS s t e m from the 0sciUomape ita length determined by the desired object distance (6) Sixteen 1 / 4 1 in. ID x 9/16 in. OD f l a t washers (7) Four 88 external lockwashers (8) Four #8 x 1 in. phillips screws. b. The special frosted plexiglass lens centering plate shown in detail in figure 6-2; all dimensions should be watched carefully. j. Four #8 x 1 inch phillipe head ecrewa. ,I k . Aceratimsterrecale. 6-13. CHANGmG THE IMAGE-TSOBJECT RATIO. 6-14. GENERAL. The 196A is normally furnished with an image-to-object ratio of 0.9-to-1, since this allows a 10 cm wide graticule to be displayed on the 9.7 cm film. On special order, however, the 196A may be purchased with an image-to-object ratio of 1-to-1 without sacrificing any of the multiple picture provisions. The following procedure i s given for your convenience in making this change in the field. It is not always absolutely necessary to readjust the focus after this adjustment, although for very critical work readjustment i s recommended (see paragraph 6- 16). 6-15. PROCEDURE. To change the image-to-object ratio proceed as follows: a. Detach the cable release from the shutter mecha- nism by unscrewing the knurled section of the cable release in a counterclockwise direction. b. Remove the lens by unscrewing it in-a counter- clockwise direction. Place it on a clean surface with the lens cap on. c. Unscrew the four screws that hold the lens clamp plate to the lens mounting board (figure 6-4). Leave the screws sticking through the lens mounting gaskets to help hold the whole assembly in one piece. CAUTION Do not disturb the placement order of the gaskets when they are