DBELETTRONICA TELECOMUNICAZIONI S.p.A.
PM 1000 – 1 kW FM Broadcasting Transmitter - USER’S MANUAL 3 /101
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 WPREAMPLIFIER/DRIVER STAGE ....................................................................................................... 21
4.3 AMP30 PRE AMPLIFIER PARTS LIST ......................................................................................................... 24
4.4 AMP300 300 WMODULE 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
