10 000 WATT FM BROADCAST TRANSMITTER
FM10
Contents (Page 5)
15 November 1999
TABLE OF CONTENTS
(Continued)
Section
Page
6
THEORY OF OPERATION
6.1
GENERAL .................................................................................................................. 6-1
6.2
TRANSMITTER DESCRIPTION ................................................................................. 6-1
6.3
AC/DC POWER SUPPLY ........................................................................................... 6-1
6.3.1
POWER TRANSFORMER (A1T1) .............................................................................. 6-1
6.3.2
THREE-PHASE RECTIFIER ASSEMBLIES (A2, A3) .................................................. 6-1
6.3.3
CIRCUIT BREAKER PANEL ....................................................................................... 6-2
6.3.4
LOW VOLTAGE POWER SUPPLY ASSEMBLY (A26) ............................................... 6-2
6.3.4.1
Low Voltage Power Supply PWB (A26A1)............................................................. 6-2
6.3.4.1.1
-15V Regulator ............................................................................................... 6-2
6.3.4.1.2
+24V Fan Supply ............................................................................................ 6-2
6.3.4.1.3
+15V Regulator .............................................................................................. 6-2
6.3.4.1.4
+5V Regulator ................................................................................................ 6-2
6.3.4.2
3-Phase Monitor PWB .......................................................................................... 6-3
6.3.5
COOLING FANS......................................................................................................... 6-3
6.3.6
SWITCHING POWER SUPPLY (A THRU F AND IPA) ............................................... 6-3
6.3.7
POWER SUPPLY CONTROL PWB (A5A1) ................................................................ 6-4
6.3.7.1
PA Volts Control ................................................................................................... 6-4
6.3.7.2
IPA Volts Control .................................................................................................. 6-4
6.3.7.3
Charging Relay Control......................................................................................... 6-4
6.3.7.4
PA Volts Monitor ................................................................................................... 6-5
6.3.7.4.1
High PA Volts ................................................................................................. 6-5
6.3.7.4.2
Low PA Volts .................................................................................................. 6-5
6.3.7.5
IPA Volts Monitor .................................................................................................. 6-5
6.3.7.5.1
High IPA Volts ................................................................................................ 6-5
6.3.7.5.2
Low IPA Volts ................................................................................................. 6-5
6.3.7.6
Temperature Monitors........................................................................................... 6-5
6.3.7.6.1
Switching Power Supplies............................................................................... 6-5
6.3.7.6.2
3-Phase Rectifier Assemblies ......................................................................... 6-6
6.3.7.7
Fan Failure Detection............................................................................................ 6-6
6.3.7.8
Switching Power Supply Module Inhibit ................................................................. 6-6
6.3.7.9
Alarm Reset.......................................................................................................... 6-6
6.4
RF POWER STAGE ................................................................................................... 6-6
6.4.1
IPA INPUT POWER PROBE ...................................................................................... 6-6
6.4.2
INTERMEDIATE POWER AMPLIFIER (IPA) MODULE .............................................. 6-6
6.4.3
INTERMEDIATE RF DRIVE SPLITTER ...................................................................... 6-6
6.4.3.1
IPA Combiner ....................................................................................................... 6-6
6.4.3.2
IPA Output Splitter ................................................................................................ 6-7
6.4.3.3
IPA SWR Probe.................................................................................................... 6-7
6.4.4
RF POWER MODULE ................................................................................................ 6-7
6.4.5
RF COMBINER/FINAL FILTER................................................................................... 6-7
6.4.6
RF POWER PROBE ................................................................................................... 6-7
6.5
CONTROL/MONITOR FUNCTION ............................................................................. 6-8
6.5.1
CONTROL/DISPLAY PWB ......................................................................................... 6-8
6.5.2
CONTROL/MONITOR PWB ....................................................................................... 6-8
6.5.2.1
External Inputs...................................................................................................... 6-8
6.5.2.2
External Outputs ................................................................................................... 6-8
6.5.2.3
Local/Remote Control Selection............................................................................ 6-9
Summary of Contents for FM10
Page 173: ...Figure SD 1 Electrical Schematic FM10 FM Broadcast Transmitter Overview Page SD 1 15 July 1997...
Page 174: ...Figure SD 2 Electrical Schematic AC DC Power Supply Sheet 1 of 2 Page SD 2 15 July 1997...
Page 175: ...Figure SD 3 Electrical Schematic AC DC Power Supply Sheet 2 of 2 Page SD 3 15 July 1997...
Page 177: ...Figure SD 5 Electrical Schematic 3 Phase Monitor PWB NAPC60 03 Page SD 5 15 July 1997...
Page 178: ...Figure SD 6 Electrical Schematic RF Power Stage Sheet 1 of 2 Page SD 6 15 July 1997...
Page 179: ...Figure SD 7 Electrical Schematic RF Power Stage Sheet 2 of 2 Page SD 7 15 July 1997...
Page 180: ...Figure SD 8 Electrical Schematic RF Combiner Final Filter NAF79 Page SD 8 15 July 1997...
Page 181: ...Figure SD 9 Electrical Schematic Control Monitor Function Page SD 9 15 July 1997...
Page 182: ...Figure SD 10 Electrical Schematic Control Display PWB NAPD05 01A Page SD 10 15 July 1997...
Page 185: ...Figure MD 1 Assembly Detail FM10 FM Broadcast Transmitter Front View Page MD 1 15 July 1997...
Page 186: ...Figure MD 2 Assembly Detail FM10 FM Broadcast Transmitter Rear View Page MD 2 15 July 1997...
Page 189: ...Figure MD 5 Assembly Detail NAG02 01 NAG02 02 Circuit Breaker Panel Page MD 5 15 July 1997...
Page 190: ...Figure MD 6 Assembly Detail NAC76 Power Supply Control Panel Page MD 6 15 July 1997...
Page 192: ...Figure MD 8 Assembly Detail NAPD05 01A Control Display PWB Page MD 8 15 July 1997...
Page 193: ...Figure MD 9 Assembly Detail NAI07 Intermediate RF Drive Splitter Page MD 9 15 July 1997...
Page 194: ...Figure MD 10 Assembly Detail NAFP68 IPA Input Power Probe Page MD 10 15 July 1997...
Page 196: ...Figure MD 12A Assembly Detail NAS43 02 Low Voltage Power Supply Page MD 12A 15 July 1997...
Page 197: ...Figure MD 12B Assembly Detail NAS43 02A Low Voltage Power Supply Page MD 12B 15 July 1997...
Page 199: ...Figure MD 14 Assembly Detail NAPC60 03 3 Phase Monitor PWB age MD 14 15 July 1997...