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1-1
SECTION I
GENERAL INFORMATION
1-1.
INTRODUCTION.
1-2.
Information presented by this section provides a general description of the Broadcast
Electronics AM-2.5E and AM-5E transmitters and lists equipment specifications.
1-3.
EQUIPMENT DESCRIPTION.
1-4.
GENERAL.
1-5.
The Broadcast Electronics AM-2.5E transmitter is a CE compliant 2.5 kW solid-state
C-QUAM
stereo AM transmitter designed for continuous operation in the 522 kHz to
1705 kHz broadcast band (refer to Figure 1-1). The Broadcast Electronics AM-5E trans
mitter is a CE compliant 5 kW solid-state C-QUAM
stereo AM transmitter designed for
continuous operation in the 522 kHz to 1705 kHz broadcast band (refer to Figure 1-2). The
AM-2.5E and AM-5E transmitters consists of modular components assembled in a single
cabinet. The modular components include: 1) an exciter/control unit, 2) an output network
assembly, 3) power block assemblies containing two RF power modules and a star combiner
assembly, 4) power supply panel assemblies, and 5) an AC distribution panel assembly.
Specific AM-2.5E/AM-5E features include:
1. Built-in C-QUAM
AM stereo circuitry.
2. High efficiency Class E solid-state RF power amplifier modules.
3. A high efficiency switching power supply.
4. Star combiner assembly. Each star combiner allows the removal of RF power mod-
ules without the use of dummy modules or bypass switches.
5. A built-in output matching network.
6. A CMOS digital controller with extensive VSWR detection and foldback circuitry
which reduces carrier interruptions by weather conditions.
7. CE compliant design.
1-6.
EXCITER/CONTROL UNIT.
The transmitter exciter/control unit (ECU) is a modular as
sembly containing plug-in stereo, exciter, and controller circuit boards. In addition to the
circuit boards, the ECU is equipped with forward and reflected power meters to provide
transmitter output power status indications.
1-7.
Stereo Circuit Board.
The ECU stereo circuit board is a modular plug-in assembly con
taining C-QUAM
AM stereo circuitry. The C-QUAM
stereo system is a mode of AM
stereo transmission utilizing amplitude modulated monaural (L+R) information and inde
pendently quadrature modulated stereo (L-R) information. The results produce a stereo
transmission system compatible with mono receivers.
1-8.
The stereo circuit board is designed with remote/local controlled mono left, mono right,
mono L+R, and stereo modes of operation. Two equalization circuits are provided to allow
the transmitter to be configured for operation into two different antennas.
C-QUAM
is a registered trademark of Motorola Inc.
Содержание AM-2.5E
Страница 11: ...1 2 FIGURE 1 1 AM 2 5E TRANSMITTER 597 1114 1 COPYRIGHT 1999 BROADCAST ELECTRONICS INC...
Страница 12: ...1 3 COPYRIGHT 1999 BROADCAST ELECTRONICS INC 597 1114 2 FIGURE 1 2 AM 5E TRANSMITTER...
Страница 22: ...597 1114 7 FIGURE 2 1 AM 2 5E TRANSMITTER INSTALLATION 2 3 2 4 COPYRIGHT 1999 BROADCAST ELECTRONICS INC...
Страница 23: ...597 1114 8 FIGURE 2 2 AM 5E TRANSMITTER INSTALLATION 2 5 2 6 COPYRIGHT 1999 BROADCAST ELECTRONICS INC...
Страница 26: ...597 1114 14 FIGURE 2 5 COMPONENT INSTALLATION 2 9 2 10 COPYRIGHT 1999 BROADCAST ELECTRONICS INC...
Страница 27: ...2 11 597 1111 11 FIGURE 2 5 EXCITER CIRCUIT BOARD PROGRAMMING COPYRIGHT 1999 BROADCAST ELECTRONICS INC...
Страница 29: ...2 13 597 1111 6 FIGURE 2 6 STEREO CIRCUIT BOARD PROGRAMMING COPYRIGHT 1999 BROADCAST ELECTRONICS INC...
Страница 30: ...2 14 597 1112 5 FIGURE 2 7 CONTROLLER CIRCUIT BOARD PROGRAMMING COPYRIGHT 1999 BROADCAST ELECTRONICS INC...
Страница 37: ...2 21 FIGURE 2 9 AM 2 5E AM 5E RF OUTPUT CONNECTIONS 597 1114 22 COPYRIGHT 1999 BROADCAST ELECTRONICS INC...
Страница 39: ...2 23 FIGURE 2 10 AM 2 5E PRIMARY AC WIRING 597 1114 10 COPYRIGHT 1999 BROADCAST ELECTRONICS INC...
Страница 40: ...2 24 FIGURE 2 11 AM 5E PRIMARY AC WIRING COPYRIGHT 1999 BROADCAST ELECTRONICS INC 597 1114 9...
Страница 43: ...2 27 FIGURE 2 12 ANTENNA LIGHTNING PROTECTION SYSTEM 597 1111 36 COPYRIGHT 1999 BROADCAST ELECTRONICS INC...
Страница 49: ...597 0095 19 FIGURE 2 15 EQUALIZATION LISSAJOUS PATTERNS 2 33 2 34 COPYRIGHT 1999 BROADCAST ELECTRONICS INC...
Страница 52: ...3 2 597 1114 13 FIGURE 3 1 AM 2 5E AM 5E CONTROLS AND INDICATORS COPYRIGHT 1999 BROADCAST ELECTRONICS INC...
Страница 57: ...597 1114 23 FIGURE 3 2 ECU CONTROLS AND INDICATORS 3 7 3 8 COPYRIGHT 1999 BROADCAST ELECTRONICS INC...
Страница 68: ...597 1114 5 FIGURE 4 1 AM 2 5E BLOCK DIAGRAM 4 3 4 4 COPYRIGHT 1999 BROADCAST ELECTRONICS INC...
Страница 69: ...597 1114 4 FIGURE 4 2 AM 5E BLOCK DIAGRAM 4 5 4 6 COPYRIGHT 1999 BROADCAST ELECTRONICS INC...
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Страница 141: ...597 1112 28A FIGURE 1 1 POWER SUPPLY CIRCUIT BOARD SIMPLIFIED SCHEMATIC 1 3 1 4 COPYRIGHT 1999 BROADCAST ELECTRONICS INC...
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Страница 168: ...597 1112 26 FIGURE 1 1 MODULATION CIRCUIT BOARD SIMPLIFIED SCHEMATIC 1 3 1 4 COPYRIGHT 1999 BROADCAST ELECTRONICS INC...
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Страница 233: ...597 1112 24A FIGURE 1 2 EXCITER CIRCUIT BOARD SIMPLIFIED SCHEMATIC 1 21 1 22 COPYRIGHT 1999 BROADCAST ELECTRONICS INC...
Страница 238: ...597 1111 25 FIGURE 1 3 STEREO CIRCUIT BOARD SIMPLIFIED SCHEMATIC 1 27 1 28 COPYRIGHT 1999 BROADCAST ELECTRONICS INC...
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