Crown Low Power Transmitters - Crown Broadcast

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Revision Control Revision Print Date Initial Release (Rev. 0; K80620–6) February 1995 Revision 1 (K80664–4) November 1995 Revision 2 (K80664A2) March 1996 Revision 3 (100885–1) October 1996 Revision 4 (100885–2) July 1997 Revision 5 (900194-1) October 1997 Revision 6 (130758-1) April 2000 Revision 7 April 2002 Revision 8 April 2005 Important Notices ©2005, Crown Broadcast, a division of International Radio and Electronics, Inc. Portions of this document were originally copyrighted by Michael P. Axman in 1991. All rights reserved. No part of this publication may be reproduced, transmitted, transcribed, stored in a retrieval system, or translated into any language in any form by any means without the written permission of Crown International, Inc. Printed in U.S.A. Crown attempts to provide information that is accurate, complete, and useful. Should you find inadequacies in the text, please send your comments to the following address: International Radio and Electronics 25166 Leer Drive, P.O. Box 2000 Elkhart, Indiana, 46515-2000 U.S.A. ii
Contents Section 1—Getting Acquainted ..................................... 1–1 1.1 Your Transmitter ............................................................................................... 1–2 1.2 Applications and Options................................................................................... 1–3 1.2.1 Stand-Alone .................................................................................................. 1–4 1.2.2 Backup .......................................................................................................... 1–4 1.2.3 Booster ......................................................................................................... 1–4 1.2.4 Exciter........................................................................................................... 1–4 1.2.5 Translator...................................................................................................... 1–5 1.2.6 Satellator ...................................................................................................... 1–6 1.2.7 Nearcasting ................................................................................................... 1–6 1.3 Transmitter/Exciter Specifications ..................................................................... 1–7 1.4 Receiver Specifications ..................................................................................... 1–9 1.5 Safety Considerations...................................................................................... 1–10 1.5.1 Dangers ...................................................................................................... 1–10 1.5.2 Warnings .................................................................................................... 1–10 1.5.3 Cautions...................................................................................................... 1–10 Section 2—Installation ............................................... 2–1 2.1 Operating Environment...................................................................................... 2–2 2.2 Power Connections ........................................................................................... 2–2 2.2.1 AC Line Voltage Setting ................................................................................ 2–2 2.2.2 Fuses ............................................................................................................ 2–4 2.2.3 Battery Power ............................................................................................... 2–5 2.3 Frequency (Channel) Selection .......................................................................... 2–5 2.3.1 Modulation Compensator .............................................................................. 2–7 2.4 Receiver Frequency Selection ............................................................................ 2–7 2.5 RF Connections ............................................................................................... 2–10 2.6 Audio Input Connections ................................................................................. 2–11 2.7 SCA Input Connections ................................................................................... 2–12 2.8 Composite Input Connection ........................................................................... 2–12 2.9 Audio Monitor Connections ............................................................................. 2–13 2.10 Pre-emphasis Selection ................................................................................... 2–13 2.11 Program Input Fault Time-out...........................................................................2–14 2.12 Remote I/O Connector.....................................................................................2–14 iii
Page 1: ® FM30/FM100/FM250 Broadcast Trans
Page 5 and 6: Section 5—Adjustments and Tests .
Page 7 and 8: I INFORMATION Section 1—Getting A
Page 9 and 10: 1.2 Applications and Options Crown
Page 11 and 12: 1.2.5 Translator A receiver configu
Page 13 and 14: 1.3 Transmitter/Exciter Specificati
Page 15 and 16: Note: We set voltage and ampere req
Page 17 and 18: ® Section 2—Installation This se
Page 19 and 20: 120Vac Illustration 2-1 Removing th
Page 21 and 22: 2.2.3 Battery Power Your transmitte
Page 23 and 24: 2.3.1 Modulation Compensator The Mo
Page 25 and 26: Frequency SW1 SW2 87.9 0 0 88.0 8 0
Page 27 and 28: 2.6 Audio Input Connections Attach
Page 29 and 30: SCA IN COMPOSITE IN MONITOR RIGHT L
Page 31 and 32: Pin Number Function 1 Ground 2 (no
Page 33 and 34: Section 3—Operation This section
Page 35 and 36: 3. Verify the following: a. The bot
Page 37 and 38: 3.3 Front Panel Bar-Dot Displays Ba
Page 39 and 40: 3.7 RF Output Control Set this cont
Page 41 and 42: in questo mondo, erono due forse, u
Page 43 and 44: 4.2 Audio Processor Circuit Board T
Page 45 and 46: Stereo Generator Board ® FM250 Ill
Page 47 and 48: Principles of Operation 4-7
Page 49 and 50: To get a direct reading of SWR, the
Page 51 and 52: 4.8 Voltage Regulator Circuit Board
Page 53 and 54:
4.11 RF Driver (FM100/FM250) The RF
Page 55 and 56:
4.15 Receiver Circuit Board Option
Page 57 and 58:
Section 5—Adjustments and Tests T
Page 59 and 60:
Using a Modulation Monitor 1. Set t
Page 61 and 62:
5.3.4 FSK Balance Control An FSK si
Page 63 and 64:
5.8 Bias Set (RF Power Amplifier) T
Page 65 and 66:
5.14 Audio Frequency Response For t
Page 67 and 68:
Section 6—Reference Drawings The
Page 70 and 71:
6.2 Board Layouts and Schematics Il
Page 72 and 73:
Illustration 6-6 Stereo Generator B
Page 74 and 75:
SEE NOTE 10 TOP SIDE COMPONENT MAP,
Page 76 and 77:
D 8169-1 Illustration 6-8 RF Meteri
Page 79 and 80:
1 2 3 4 5 6 7 8 9 1 2 3 4 5 6 7 8 9
Page 81 and 82:
R27 D 8167-5 Illustration 6-10 Disp
Page 84:
2 4 6 8 3 2 1 1 3 5 7 9 6 5 4 3 2 1
Page 87 and 88:
R20 R19 Illustration 6-13 Power Amp
Page 89 and 90:
Illustration 6-14 RF Output Filter
Page 92 and 93:
F 1 2 3 4 5 6 7 8 ADDED TO PWB (200
Page 96 and 97:
Section 7—Service and Support We
Page 98 and 99:
Crown Broadcast Three Year Limited
Page 100 and 101:
Factory Service Instructions To obt
Page 102 and 103:
Transmitter efficiency output RF Po
Page 104 and 105:
A B C AF ALC AM bandwidth BCD BFO B
Page 106 and 107:
A B C pre-emphasis processing recei
Page 108 and 109:
Symbols 19-kHz level adjustment 5-4
Page 110 and 111:
L labels 1-10 LEDs 3-5, 4-10 line v
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Crown Low Power Transmitters - Crown Broadcast

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