DB ELETTRONICA TELECOMUNICAZIONI S.p.A.
PM 1000 – 1 kW FM Broadcasting Transmitter - USER’S MANUAL
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INDEX
1. PM1000 FM TRANSMITTER ................................................................................................................................ 4
1.1 GENERAL DESCRIPTION ............................................................................................................................... 4
2. TECHNICAL SPECIFICATIONS ....................................................................................................................... 11
3. INSTALLATION .................................................................................................................................................... 13
3.1 FREQUENCY CHANGE ................................................................................................................................. 14
3.2 ADJUSTMENTS AND MEASURES ............................................................................................................... 16
3.3 EXTERNAL CONTROL AND MEASURES .................................................................................................. 17
3.3.1 SYSTEM CHECK SECTION ..................................................................................................................... 17
3.3.2 MEASURES / CONTROLS SECTION ...................................................................................................... 18
3.4 GENERAL BLOCK DIAGRAM DESCRIPTION ........................................................................................... 20
4. AMPLIFIER SECTION ......................................................................................................................................... 21
4.1 GENERAL DESCRIPTION ............................................................................................................................. 21
4.2 30 W PREAMPLIFIER/DRIVER STAGE ....................................................................................................... 21
4.3 AMP30 PRE AMPLIFIER PARTS LIST ......................................................................................................... 24
4.4 AMP300 300 W MODULE AMPLIFIER ......................................................................................................... 25
4.5 AMP300 AMPLIFIER PARTS LIST................................................................................................................ 28
5. POWER SUPPLY STAGE .................................................................................................................................... 32
5.1 GENERAL DESCRIPTION ............................................................................................................................. 32
5.2 POWER SUPPLY BOARD 04011-001 PARTS LIST ...................................................................................... 36
5.3 RS-75-24 SWITCHING POWER SUPPLY ..................................................................................................... 39
5.4 0601-008 POWER SUPPLY BOARD .............................................................................................................. 42
5.5 POWER SUPPLY PART LIST ......................................................................................................................... 44
6. MODULATOR STAGE ......................................................................................................................................... 45
6.1 GENERAL DESCRIPTION ............................................................................................................................. 45
6.2 SINTEL ‘96 MODULATOR BOARD .............................................................................................................. 46
6.3 MODULATOR BOARD PARTS LIST ............................................................................................................ 53
7. PROTECTION BOARD ........................................................................................................................................ 56
7.1 PROTECTION BOARD N°1 PART LIST ....................................................................................................... 62
7.2 PROTECTION BOARD N°2 PART LIST ....................................................................................................... 70
8. METER STAGE ..................................................................................................................................................... 71
8.1 GENERAL DESCRIPTION ............................................................................................................................. 71
8.2 METER BOARDS PARTS LIST ..................................................................................................................... 76
9. IN-AUDIO BOARD ................................................................................................................................................ 78
9.1 IN-AUDIO BOARD PARTS LIST ................................................................................................................... 80
9.2 IN-AUDIO BOARD JUMPERS SETTING ...................................................................................................... 81
10. TRANSMITTER OPTIONS .............................................................................................................................. 82
10.1 EXTERNAL FREQUENCY CONTROL (/C OPTION) ..................................................................................... 82
10.2 EXTERNAL FREQUENCY CONTROL PARTS LIST ................................................................................... 84
11. STEREO ENCODER BOARD (/S OPTION) .................................................................................................. 85
11.1 CHANNELS PRE- EMPHASIS SETTING ...................................................................................................... 85
11.2 STEREO ENCODER PARTS LIST ................................................................................................................. 96
12. APPENDIX .......................................................................................................................................................... 99
12.1 APPENDIX A - XLR AUDIO CONNECTORS PINOUTS .............................................................................. 99
12.2 APPENDIX B - MOSFET REPLACEMENT ................................................................................................. 100
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