HarrisMs15rModules电路图.pdf

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1、TECHNICAL MANUAL MS-lSR MODULES HARRIS CORPORATION Broadcast Products Division T.M. Nos. 888 1781 002 -OS Printed: November 1977 RadioFans.CN 收音机爱 好者资料库 LIST OF EFFECTIVE PAGES 11 TOTAL NUMBER OF PAGES IS AS FOLLOWS: 135 PAGE NO. T.M. No. 888 1781 002 Title Page . . ii through iii . . i v . 1 th rou

2、gh 13 . . 14 . , . . 15 through 23 . . 24 . . 25 . . . 26 . . . 27 through 40 . . T.M. No. 888 1781 OOJ Title Page . . i1 through iii . . iv . . 1 through 9 . . 10 . . 11 through 19 . . 20 . . 21 through 30 . . T.M. No. 888 1781 004 Title Page . . ii through iii . . iv . . I through 11 . . 12 . . 13

3、 . . 14 15 22 through 21 . . 23 through 38 . . ISSUE Original Original Blank Original Blank Original Blank Original Blank Original Original Original Blank Original Blank Original Blank Original Original Original Blank Original Blank Original Blank Original Blank Original PAGE NO. T.M. No. 888 1781 0

4、05 Title Page . . i1 through iii . . iv . . 1 through 9 . . 10 . . 11 through 19 . . 20 . . 21 through 32 . . WARNING: Disconnect primary power prior to servicing. ISSUE Original Original Blank Original Blank Original Blank Original RadioFans.CN 收音机爱 好者资料库 (!) rl :J 0 o l: rl 00 . rl H H SAFETY tJOn

5、CE WARNING: TEE CURRENTS AND VOLTAGES fN THIS EQUIPMENT ARE DANGEROUS AND UNDER CERTAIN CONDITIONS, COULD BE fATAL. This anual is intended as general guidance for trained and qualified in- stallation, operating, maintenance and service personnel who are familiar with and aware of the dangers inheren

6、t to handling potentially hazardous electrical and/or eLectronic circuits. It is not intended to contain a complete statement of all safety precautions whLch should be observed by personnel in using this or other electronic equipment. THE INSTALLATION, OPERATION, MAINTENANCE AND SERVICING OF THIS EQ

7、UIPMENT INVOLVES RISKS TO BOTH PERSONNEL AND EQUIPMENT, AND MUST BE PERFORMED ONLY BY PROPERLY TRAINED AND EXPERIEtCED PElSONNEL EXERCISING DUE CARE. PER- SONNEL MUST FAMILIARIZE THEMSELVES WITH SAFETY REQUIREHF.NTS, SAFE HANDLING MI) OPERATING PRACTICE, AND RELATED FIRST-AID PROCEDURES (E.G. , FOR

8、ELEC- TRICAL BURNS AND ELJ:CTRICAL SHOCK). HARRIS CORPORATION Broadcast Equipment Division shall not be responsible for injury or damage resuLting from improper installation, operation, main- tNlance or servicing, or from the use of improperly trained or inexperienc- ed personnel in the performance

9、of such tasks, or from the failure of per- sons engnged in such tasks to exercise due care. As with all electronic equipment, care should be taken to avoid leclrical shock in all circuits where substantial currents or voltages may be pre- sent, either through design or short circuit. Caution should

10、also be ob- served in lifting and hOisting equipment, especially regarding large struc- tures, during installation. LIABILITY LIMITATION The procedures outlined in this Manual are based on the information avail- able at the time 0f publication and should permit the speciled use with minimum risk. Ho

11、wever, the manufacturer cannot assume liability with re- spect to technical application of the contents nod shall, under no circum- stances, be responsible for damage or injury (whether to person or proper- ty) resulting from its use. The manufacturer is specifically not liable for any damage or inj

12、ury aris- ing out of failure to follow the instructions in this Manual or failure to exercise due care and caution during installation, operation, mainte- nance and service of this equipment. CAUTIONARY NOTICE Always disconnect power before opening covers, doors, enclosures, gates, panels O shields.

13、 Always use grounding sticks and short out high volt- age points before servicing. Never make internal adjustments, perform maintenance or service wen alone or when tired. Never remove, short-circuit or tamper with interlock switches on access covers, doors, enclosures, gates, panels or shields. Kee

14、p away from live cireui ts, know your cquipr.lf.nt and don I t take chances. Proper training of experienced personnel and observing the above guidelines will help as- surG safe and continued operation of this equipment. iii WARNING: Disconnect primary power prior to servIcing. RadioFans.CN 收音机爱 好者资料

15、库 iv TABLE OF CONTENTS FOR MS-lSR MODULES VOLUME II STEREO ANALOG Module . 888 1781 002 STEREO DIGITAL Module . , . 888 1781 003 STEREO OVS C Module . . 888 1781 OUTPlIT Mo du1e . 888 1781 005 WARNING: Disconnect primary power prior 10 servicing. W .J :J 0 a N :E a a t: 0 .J 00 r-. z 00 a 00 w 00 0:

16、 w l- V) T .M. No. 8 TECHNICAL MANUAL STEREO ANALOG MODULE 994 7989 002 HARRIS CORPORATION Broadcast Products Division Printed: November 1977 TABLE OF CONTENTS Paragraph Page ii SECTION I. GENERAL DESCRIPTION 1-1. Equipment Purpose . 1 1-3. Technical Characteristic.s . 1 SECTION II. INSTALLATION 2 -

17、1. Gene r a 1 . 1 SECTION III. CONTROLS AND INDICATORS 3-1. General . 1 4-1. 4-2. 4-3. 4-4. 4-5. 4-9. 4-10. 4-15. 4-17. 4-18. 4-19. 4-21. SECTION IV. PRINCIPLES OF OPERATION Circuit Description . 1 Input Circuit . 1 Input Protection Network . 1 Input Preamplifier . 12 Filter Circuit . 12 Swit ching

18、Ci rcui t . 12 Switch Drivers . 12 Mode Switching . 15 Monaural Operation . . 15 Stereophonic Operation . 16 Output Circuit . 16 Power . 17 SECTION V. MAINTENANCE 5-1. Corrective Maintenance . , . 17 5-3. Troubl esho oting . 17 SECTION VI. PARTS LIST 6-1. General . 33 Table 1-1. 3-1. 3-2. LIST OF TA

19、BLES Technical Characteristics . 2 STEREO ANALOG Module Controls and Indicators . 4 Control Adjustments . 6 5-1. STEREO ANALOG Module Fault Isolation Index . 18 5-2. STEREO ANALOG Module Parts Index . 21 WARNING Disconnect primary power prior 0 servicing I- -.I 00 I- o a N N o o LIST OF TABLES (Cont

20、inued) STEREO ANALOG Module Front Panel . , . ,. 28 6-2. STEREO ANALOG Module Circuit Board . 29 LIST OF ILLUSTRATIONS 3-1. STEREO ANALOG Module . ,. 3 4-l. 4-2. 5-1. 5-2. 5-3. 5-4. 5-5. 5-6. 5-7. 5-8. 5-9. STEREO ANALOG Module Block . . . . . . . . . . . . . . . . . . . . . . . 13 DSM Waveform . ,.

21、 16 STEREO ANALOG Module Parts STEREO ANALOG Module Waveforms STEREO ANALOG Module Schematic . ,. ,. . . , . Ii l . ,. . II 20 No Output . . No Audio from Le and/or Right Channel (pilot present) . . N ois e . , . . Poor 23 25 27 28 29 Poor Crosstalk 38 kHz Carrier . III ,. II . II: . 6 1-n :J. .on.t

22、.-ro-l=Z-R-j.-I-trA-!N-M:.A.:tCH Gefl-t-tOi- lSR14) /PRE-MPH MATCH _dj ument (C4 Justment p oCedure. 1. Remove the module. Mount the module in the stereo generator using the extender board provided with the stereo generator. 2. Disconnect the audio inputs from the LEFT -and + (T8l pins 7 and 9) and

23、IGlIT -and + (T81 pins 10 and 1.2) on the rear of the stereo generator. 3. Apply a 10 kPz sinewave at +10 dEm to the left channel only. 7 WARNING: Disconnect primary power prior to servicing. 8 Table 3-2. Control Adjus.tments (Continued) CONTROL ADJUSTMET LEFT SEPARATION Control (R28) RIGHT SEPARATI

24、ON Control (R31) GAIN MATCH Control (R14) PRE-EMPH MATCH Adjustment (C4) 4. Connect a spectrum analyzer to module pin 70. 5. Operate the OUTPUT module meter switch to L. Adjust the 10 kz signal level until the meter in- dicates 100%. 6. Adjust R37 to obtain a minimum indication of the 114 kHz sideba

25、nds on the spectrum analyzer (typical supression 70 dB). 7. Disconnect the spectrum analyzer. 8. Remove the module and extender board and replace the module in the stereo generator. Remove the 10 kHz test signal and reconnect the left channel audio input. 1. Remove the module. Mount the module in th

26、e stereo generator using the extender board provided with the stereo generator. 2. Disconnect the audio inputs from the LEFT -and + (TBl pins 7 and 9) and RIGHT -and + (TBl pins 10 and 12) on the rear of the stereo generator. 3. Perform the 114 KHZ NULL Control (R37) adjust- ment procedure, steps 1

27、through 7. NOTE Correct adjustment of R28 and R31 requires use of a dc coupled oscilloscop with good high frequency amplitude and phase response. A X 1 probe must be used. 4. Connect the oscilloscope to module pin 70. 5. Set the PILOT ON/OFF switch to OFF. 6. Adjust R28 to obtain the flattest compos

28、ite sig- nal base line indication on the oscilloscope. 7. Remove the 400 Hz test signal from the left chan- nel and connect the signal to the RIGHT -and + (TBI pins 10 and 12) only. WARNING: Disconnect primary power prior to servicing. N o o rl co . .-I Table 3-2. Control Adjustments (Continued) CON

29、TROL ADJUSTMENT 8. Operate the OLTPUT module meter switch to R. Adjust the 400 Hz signal level until the meter in- dicates 100%. 9. Adjust R31 to obtain the flattest composite sig- nal base line indication on the oscilloscope. 10. Set the STEREO OVSC module IN/OUT switch to OUT. 11. Remove the 400 H

30、z test signal from the right channel. 12. Connect a 100 Hz sinewave to both the LEFT -and + (TBI pins 7 and 9) and the RIGHT -and + TBI pins 10 and 12) (both channels strapped together so that L + R). LR 13. Operate the OUTPUT module meter switch to L. Adjust the 100 Hz signal level until the meter

31、in- dicates 100%. 14. Adjust C4 to midrange. 15. Using a spectrum analyzer connected to modu1e pin 70 or a stereo modulation monitor on the exciter output adjsuted to the L-R position, adjust Rl4 for a minimum indication of the L-R signal (typical supres- sian 65 dB). 16. Remove the 100 Hz test sign

32、al from the stereo generator audio inputs. 17. Connect a IS kHz sinewave to both the LEFT -and + (TBI pins 7 and 9) and the RIGHT -and + (TBI pins 10 and 12) (both channels strapped together so that L = R). 18. Operate the OUTPUT module meter switch to L. Adjust the 15 kHz signal level until the MOD

33、ULATION meter indicates 100%. 19. Adjust C4 for a minimum indication of the L-R signal (typical supression 60 dB). Note the audio inputs. 20. Remove the 15 kHz test signal from the audio inputs. WARNI NG: Disconnect primary power prior to serviCing. 9 10 Table 3-2. Contol Adjustments (Continued) CON

34、TROL ADJrSTMENT 21. Connect a 400 Hz sinewave to the LEFT -and + (TBI pins 7 and 9). For test purposes only, cross connect the left and right audio inputs out of phase so that L =-R as follows: TBI pin 7 to TBI pin 12 TBI pin 9 to TBI pin 10 22. Operate the OUTPUT module meter switch to L. Adjust th

35、e 400 Hz signal level until the meter in- dicates 100%. 23. If a stereo modulation monitor is used, adjust the monitor to the L + R position. 24. If the supression of the L + R signal is not the same as the L -R signal noted in step 19, alternately adjust R28 and R31 slightly equal amounts in the sa

36、me direction until the L + R supression is equal to the L - R supression noted in step 19. 25. Remove the 400 Hz test signal and straps from the audio inputs. 26. Connect a 400 Hz sinewave to the LEFT -and + (T8l pins 7 and 9). 27. Operate the OUTPUT module meter switch to L. Adjust the 400 Hz signa

37、l level until the meter in- dicates J 00%. 28. Repeat steps 4 through 9. Ensure the separation has not degraded. 29. Perform the PILOT LEVEL Control (R4l) adjustment procedure, steps 1 through 7. 30. Perform the CaMP LEVEL Control (R27) adjustment procedure, steps 1 through 4. 31. Perform the MONO G

38、AIN Control (R60) adjustment procedure, steps 1 through 6. 32. Disconnect the oscilloscope and spectrum analyzer from the module. Remove the module and extender board and replace the module in the stereo generator. 33. Remove the 400 Hz test signal and reconnect the audio inputs. Reconnect the excit

39、er output to the load WARNI NG: Disconnect primary power prior to servicing. N o o rl 00 r-. .-I CONTROL Table 3-2. Control Adjustments (Continued) ADJUSTMENT 34. Set the PILOT ON/OFF switc.h to ON. Set the STEREO OVSC module IN/OUT switc.h to ON. 11 WARNING: Disconnect primary power prior to servic

40、ing. (Ul and U2) through input protection networks (see figure 4-1). to the preamplifier circuits from an excessive input signal. is prevented a can of diodes connected to the +15 vdc sources. If a signal or transient exceeding the power supply potential appears at the module input, the portion of t

41、he input which exceeds the power supp po- tential will be shunted by the diodes to the Vdc power to limit the signal. INPUT PREAMPLIFIER. The preamplifiers differ from stand- ard and the methods th which feed- back is to the difference in poten- tial between same is to both simultaneous one input is

42、 driven and the connection to the second input , the output 1 be zero. The amplifier therefore behaves as a transformer with response to DC. The ampl! also provide the transformers advantages of isolation and hum rejection without the problems of limited frequency response and phase distortion. P as

43、is selectors J1 and J2 allow pre-emphasis selection of 75us, SOus, 25us, or FLAT response. r gain is by resistors R7, and the network. The PRE-EMPH MATCH control (C4) in the left channel preamplifier allows adjustment of the left channel p cir- cuft to match the channel p characteristics. The pre- a

44、udio is to OTR J3 in the left channel and OTR filter selector J5 in the FILTER CIRCUIT. 4-6. Pre-emphasized audio from the input preamplifiers is applied to OTR (Dynamic Transient Response) filter selectors J3 in the left channel and JS in the ri t channel. Outputs to the AC mete circuits allow monitoring of the left and right p ized levels. 7. Normal