Boonton8210 电路图.pdf

RadioFans.CN 收音机爱 好者资料库 RadioFans.CN 收音机爱 好者资料库 INSTRUCTION MANUAL MODEL 8210-01-S/3 F.M.-A.M. MODULATION METER N00104-88-D-D058 N00104-91-D-M090 7Z 6625-01-284-8256 BOONTON ELECTRONICS CORPORATION 791 ROUTE 10 - RANDOLPH, NJ 07869-1980 PHONE: (201)584-1077 O FAX: (201)584-3037 TLX: 710-986-8215 BOONTRONICS Part No. 984003-1 Printed In U.S.A. RadioFans.CN 收音机爱 好者资料库 SAFETY SUMMARY The following general safety prccilutirms must be observed during all phases of operation and maintenance of this instrument. Failure to comply with these precautions or with specific warnings elsewhere in this manual violates safety standards of design, manufacture, and intended use of the instrument. Boonton Electronics assumes no Iiability for the customers failure to comply with these requirements. THE INSTRUMENT MUST BE GROUNDED To minimize shock hazard the instrument chasis and cabinet must be connected to an electrical ground. The instrument is quipped with a three conductor, three prong a.c. power cable. The power cable must either be plugged into an approved three-contact electrical outlet or used with a three-contact to a two-contact adapter with the (green) grounding wire firmly connected to an electrical ground at the power outlet. DO NOT OPERATE THE INSTRUMENT IN AN EXPLOSIVE ATMOSPHERE. Do not operate the instrument in the presence of flammable gases or fumes. KEEP AWAY FROM LIVE ClRCUITS. Operating personnel must not remove instrument covers. Component replacement and internal adjust- ments must be made by qualified maintenance personnel. Do not replace components with the power cable connected. Under certain conditions dangerous voltage may exist even though the power cable was removed, therefore; always disconnect power and discharge circuits before touching them. DO NOT SERVICE OR ADJUST ALONE. Do not attempt internal service or adjustment unless another person, capable of rendering first aid and resuscitiation, is present. DO NOT SUBSTITUTE PARTS OR MODIFY INSTRUMENT. Do not install substitute parts or perform any unauthorized modification of the instrument. Return the instrument to Boonton Electronics for repair to ensure the safety features are maintained. SAFETY SYMBOLS. This safety requirements symbol (located on the rear panel) has been adopted by the lnternational Elcctrotechnical Commission. Document 66 (Central Office) 3. Para- graph 5.3. which directs that and instrumnet be so labeled if for the correct use of the instrument. it is necessary to refer to the instruction manual. In this case it is recommended that reference be made to the instruction manual when connecting the instrument to the proper power source. Verify that the correct fuse is installed for the power available, and that the switch on the rear panel is set to the applicable operating voltage. The CAUTION sign denotes a hazard. It calls attention to an operatition procedure. practice, or the like, which, it not correctly performed or adhered to could result in damage to or destruction of part or all of the equipment. Do not proceed beyond a CAUTION sign until the indicated conditions are fully understood and met. The WARNING sign denotes a hazard. It calls attention to an operation procedures. practice, or the Iike, which, if not correctly performed or adhered to could result in injury or loss of life. Do not proceed beyond a WARNING sign until the indicated conditions are fully understood and met. Indicates dangerous voltages. BOONTON ELECTRONICS CORPORATION Instruction-Manual SUPPLEMENT: MODEL 8210-01-S/3 Instruction -manual supplements are issued as required to correct errors in a manual, and to adapt the manual to changes made after its printing. Page 1-1, Para. 1-2. b. replace Each time it is turned on, . . .with When the LEVEL key is depressed at power on, . . Page 1-4, Para. 1-6 continued. add after the WEIGHT specification, “Recommended Calibration Internal:12 Months.” Page 2-4, Para. 2-3. a. before the period after “position” add “and depress the LEVEL key” Page 2-8, Para. 2-5. a. (1) after the word “measured” add “Note: If a calibration cycle is desired, depress the LEVEL key while the firmware date is displayed.” Page 2-8, Para. 2-5. a. (2) delete the text, “After the 8210 has completed its calibration cycle,” and Capitalize the word “select”. Page 2-5, Para. 2-5 c. after The LEVEL pushbutton serves another purpose.” add “If a calibration operation is desired, depress the LEVEL key while the firmware date is displayed at power on.” Page 3-2, Para. 3-2 c. delete the words “which are activated when the 8210 is turned on” Page 3-10, Para. 3-3 e. before the word “RAM” add “non-volatile” i Page 3-13, Para. 3-3 e add sub-paragraph (8) “Non-volatile operation of A4U13 is controlled byU31. This circuit switches the Vcc connection of A4U13 from the + 5L supply to the battery supply, BT1 and BT2, when the + 5L supply falls below the battery voltage. Additionally, U31 inhibits the chip enable signal at pin 18 of A4U13 when the + 5L supply drops below 4.75 volts. This action insures that the RAM contents will not change when power is removed.” Page 4-20, Table 4-9 before step 1) add, ProcedureIndicationIndication is abnormal Connect scope toTTL highReplace A4U13. Pin 16 of A4U8. Connect scope toVoltage greaterReplace BT1 and Bt2. pin 2 of U31.than 2.2 volts dc. Compare signals onSame signal.Replace U31. pins 5 and 6 of U31. Page 5-9, Table 5-2 Before Item Cl add Item BT1-Battery, alkaline, 1.5 volts-54473;P146ND-55601100A add Item BT2-Battery, alkaline, 1.5 volts-54473;P146ND-55601100A Page 5-11, Table 5-2 after Item U29 add Item U31-IC DS1210 controller-0B0A9;DS1210-53514300A change Item U11-IC EProm PROG.-04901-53444300B add Item XBTl,2-Socket Battery-FSCN-BH2AAA-W-48331700A Page 5-12, Table 5-2 Change Item T1 from part number 446093 to 446101 i a Page 6-9,10, Figure 6-5 modify schematic as follows: Page 6-13,14 Figure 6-7 modify schematic as follows: change voltage at C26 from 8.7V to 9.7V change voltage at C27 from 20V to 22V change voltage at C25 from -20V to -22V i b ii Figure 1-1.Model 8210 F.M.-A.M. Modulation Meter 8210-1182 T A B L E O F C O N T E N T S SECTION I -INTRODUCTION SUBSECTION PAGE 1-1Safety Notice . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1 1-2Description of the Instrument. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2 1-3Items Furnished. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2 1-4Options and Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2 1-5Environmental Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2 1-6Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2 SECTION II - INSTALLATION AND OPERATION 2-1Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2Operating Controls,Indicators and Connectors . . . . . . . . . . . . . . . . . 2-3Preliminary Check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-4Application Notes. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-5Operating Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-6Performance Verification. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . a.Test Equipment Required. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . b. R.F.Input Sensitivity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . c. Deviation Accuracy. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . d.Residual F.M. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . e.Residual A.M. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . f. A.M.Rejection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . g. A.M. Audio Distortion, . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . h.Audio-Frequency Response, 15 kHz . . . . . . . . . . . . . . . . . . . . . . . . . i. F.M.Audio Distortion. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . j. F.M. Rejection. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . kAudio-Frequency Response, 3 kHz . . . . . . . . . . . . . . . . . . . . . . . . . . l.Audio-Frequency Response, 750 us De-emphasis . . . . . . . . . . . . . m. A.M.Depth Accuracy . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . SECTION III - THEORY OF OPERATION 3-1Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2Circuits:General Discussion. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . a. R.F.Circuits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . b. I.F.Circuits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . c. Calibrator Circuits. . . . . . . . . . . . . . . . . . . . . . . . . . . . d. A.F.Circuits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . e.Logic Circuits. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . f. . . . . Power-Supply Circuits. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-3Circuits:Detailed Discussion. . . . . . . . . . . . . . . . . . . . . a. R.F.Circuits. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . b. I.F.Circuits. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . c. Calibrator Circuits. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . d.A.F. Circuits. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . e.Logic Circuits. . . . . . . . . . . . . . . . . . . . . . f. . . . . . . . . . . . . . . . Power-Supply Circuits. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1 2-2 2-4 2-4 2-8 2-9 2-9 2-10 2-10 2-11 2-11 2-12 2-12 2-12 2-13 2-13 2-14 2-14 2-14 3-1 3-1 3-1 3-2 3-2 3-2 3-2 3-2 3-2 3-2 3-5 3-7 3-10 3-10 3-13 8210-1182iii SECTION IV- MAINTENANCE AND ADJUSTMENT SUBSECTION 4-1Introduction. . . . . . . . . . . . 4-2Test Equipment Required. 4-3Location of Major Assemblies 4-4Removal of Major Assemblies and Parts a. Instrument Covers. . . b. R.F.-Assembly Cover. c. R.F. Circuit Board. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . d.I.F.-A.F.Circuit Board. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . e.Rear-Panel Assembly. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . f.Digital Circuits and Power-Supply Board. . . . . . . . . . . . . . . . . . . g. Display Circuit Board. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-5Removal of Detail Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-6Preliminary Checks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-7Troubleshooting. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-8Adjustment and Alignment Procedures. . . . . . . . . . . . . . . . . . . . . . . . . . PAGE 4-1 4-1 4-1 4-1 4-1 4-4 4-4 4-4 4-4 4-5 4-5 4-5 4-6 4-7 4-26 SECTION V - PARTS LIST 5-1Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-1 SECTION VI - SCHEMATIC DIAGRAMS 6-1Schematic Diagrams, Table of Contents . . . . . . . . . . . . . . . . . . . . . . . . . 6-1 APPENDIX A- CALIBRATOR OPERATION A-1Introduction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-1 A-2Technical Discussion . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-1 a. F.M.Calibrator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-1 b. A.M.Calibrator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-1 c. Audio Processing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . d. R.F. A-4 Circuitry . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-4 LIST OF ILLUSTRATIONS FIGURE 1-1Model 8210. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1Model 8210,Front View . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2Model 8210,Rear view . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-3Residual F.M., Typical. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-4Residual A.M., Typical . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-5Audio Response, Typical . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-6Test Setup: R.F.Input Sensitivity . . . . . . . . . . . . . . . . . . . . . . . . . PAGE ii 2-3 2-3 2-5 2-5 2-6 2-10 iv8210-1182 LIST OF ILLUSTRATIONS (CONTINUED) FIGURE PAGE 2-7 2-8 2-9 2-10 3-1 3-2 3-3 3-4 3-5 3-6 3-7 3-8 4-1 4-2 4-3 Test Setup:Residual F.M., Residual A.M. . . . . . . . . . . . . . . . 2-11 Test Setup: A.M. Rejection, Frequency Response, Audio Distortion. 2-12 Test Setup:F.M. Audio Distortion, F.M. Rejection . . . . . . . Packaging Diagram. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Simplified Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . R.F. Circuits:Detailed Block Diagram. . . . . . . . . . . . . . . . . . . . . . . . . Sampling Gate:Simplified Operation. . . . . . . . . . . . . . . . . . . . . I.F. Circuits: Detailed Block Diagram . . . . . . . . . . . . . . . . . . . Calibrator Circuits:Detailed Block Diagram. . . . . . . . . . . . . . . . . . . A.F.Circuits:Detailed Block Diagram. . . . . . . . . . . . . . . . . . . . . . . . . Logic Circuits:Detailed Block Diagram . . . . . . . . . . . . . . . . . Program Flow Diagram. . . . . . . . . . . . . . . . . . . . Model 8210:Top View with Covers Removed. . . . . . . . . . . . . . . . . Model 8210:Bottom View with Covers Removed. . . . . . . . . . . . . Test Setup:Adjustment and Alignment . . . . . . . . . . . . . . . . . . . LIST OF TABLES TABLE 2-1 2-2 4-1 4-2 4-3 4-4 4-5 4-6 4-7 4-8 4-9 4-9a 4-9b 4-9c 4-10 4-11 5-1 5-2 Operating Controls,Indicators and Connectors . . . . . . . . . . . . . Test Equipment for Performance Verificatuion . . . . . . . . . . . . . . . . . . . Test Equipment for Maintenance and Adjustment . . . . . . . . . . . . . . . . . Power-Supply Checks. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Condition-Code Displays . . . . . . . . . . . . . . . . . . . . . . . .