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P25 DIGITAL VHF
TRANSMITTER
INSTRUCTION MANUAL
VT-4D 136-174 MHZ
Covers Models:
VT-4D140-R0-000
VT-4D160-R0-000
Copyright © 2003 Daniels Electronics Ltd. All rights reserved. No
part of this publication may be reproduced, stored in a retrieval system
or transmitted in any form or by any means, electronic, mechanical,
photocopying, recording or otherwise, without the prior written consent
of Daniels Electronics Ltd.
DE™ is a registered trademark of Daniels Electronic Ltd. registered in
the U.S. Patent and Trademark Offi ce.
Module Manuals Included:
IM21-VT3150AMP
Document Number:
IM21-001
Daniels Electronics Ltd.
Revision:
1-0-0
Victoria, BC
Revision Date:
Aug 2003
PRINTED IN CANADA
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Table of Contents
Related Manuals for Daniels VT-4D140-R0-000
Summary of Contents for Daniels VT-4D140-R0-000
- Page 1 Daniels Electronics Ltd. DE™ is a registered trademark of Daniels Electronic Ltd. registered in the U.S. Patent and Trademark Offi ce. Module Manuals Included:...
- Page 2 This document has been produced, verifi ed and DOCUMENT CONTROL controlled in accordance with Daniels Electronics’ Quality Management System requirements. Please report any errors or problems to Daniels Electronics’ Customer Service Department. NOTE The user’s authority to operate this equipment could be revoked through any changes or modifi...
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Page 3: Table Of Contents
Contents General Information ............... Introduction ....................Performance Specifi cations ............... Theory of Operation ............... General ...................... Jumper Functions and Standard Confi guration ........Test Points ....................Transmitter Programming ................ Transmitter Assembly and Adjustment......... Repair Note....................Recommended Test Equipment List ............Transmitter Assembly and Adjustment............. -
Page 4: General Information
GENERAL INFORMATION Manual Organization The organization of this document refl ects the modular construction of the VT-4D family of products. Each product is fully described within its respective “sub-manual”; all of which are contained within this document. In general, each of these sub-manuals contain: A functional description and specifi... -
Page 5: Performance Specifi Cations
General Information VT-4D150 Transmitter Family Models There are four distinct models in the VT-4D150 Transmitter family each with different bands of operation and power outputs. The four models are as follows: • VT-4D140-2 136-150 MHz band, 0.5-2.0 Watt • VT-4D140-8 136-150 MHz band, 2.0-8.0 Watt •... - Page 6 General Information PTT Activation: • Active to ground; Microphone activated; • Front Panel switch: KEY TX PTT Time-Out-Timer: Programmable from 1 sec. to 8 hrs or infi nity. (Default 5 min.), using Radio Service Software package. Standby Current: Transmitter with no Standby ≤...
- Page 7 Anodized aluminum construction. Stainless steel hardware. Gold plated module connectors. Module Design: Compact Eurostandard modular design. Plug-in modules mate with Daniels standard M3 repeater subrack. Subracks/modules comply with IEEE 1101, DIN 41494 and IEC 297-3 (mechanical size / modular arrangement). External Connections: RF Connection: type N connector located on the transmitter module front panel.
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Page 8: Theory Of Operation
THEORY OF OPERATION P25 Digital VHF Transmitter Instruction Manual IM21-001... -
Page 9: Transmitter Assembly And Adjustment
TRANSMITTER ASSEMBLY AND ADJUSTMENT Repair Note The transmitter is mainly made up of surface mount devices, which should not be removed or replaced using an ordinary soldering iron. Removal and replacement of surface mount components should be performed only with specifi... -
Page 10: Repeater System Confi Guration
REPEATER SYSTEM CONFIGURATION P25 Digital VHF Transmitter Instruction Manual IM21-001... -
Page 11: Illustrations And Schematics
ILLUSTRATIONS AND SCHEMATICS Printed Circuit Board Numbering Convention Daniels Electronics Ltd. has adopted a printed circuit board (PCB) numbering convention in which the last two digits of the circuit board number represent the circuit board version. All PCB’s manufactured by Daniels Electronics Ltd. -
Page 12: P25 Digital Transmitter Front Panel
MIC MODE DIGITAL MICROPHONE MODE SELECTION SWITCH CNTL RJ45 CONNECTORS RF OUT TYPE N RF OUTPUT JACK (Antenna) DANIELS ELECTRONICS LTD. MADE IN CANADA VT-4D150 MADE IN CANADA TRANSMITTER MODEL IDENTIFIER DANIELS ELECTRONICS LTD. TITLE: Digital Transmitter Front Panel DATE: 23 JUL 2003... -
Page 13: Parts Lists
PARTS LISTS P25 Digital Transmitter Electrical Parts List Desig Description Part Number P25 Digital VHF Transmitter Instruction Manual IM21-001... -
Page 14: Revision History
REVISION HISTORY Revision Date Description P25 Digital VHF Transmitter Instruction Manual IM21-001... - Page 15 Daniels Electronics Ltd. DE™ is a registered trademark of Daniels Electronic Ltd. registered in the U.S. Patent and Trademark Offi ce. Document Number: IM21-VT3150AMP Daniels Electronics Ltd.
- Page 16 This document has been produced, verifi ed and DOCUMENT CONTROL controlled in accordance with Daniels Electronics’ Quality Management System requirements. Please report any errors or problems to Daniels Electronics’ Customer Service Department. NOTE The user’s authority to operate this equipment could be revoked through any changes or modifi...
- Page 17 RF exposure limits. In accordance with OET Bulletin 65 and FCC 47 CFR § 1.1307 (b), this Daniels Electronics Ltd. transmitter is categorically excluded from routine evaluation or preparing an EA for RF emissions and this exclusion is suffi cient basis for assuming compliance with FCC MPE limits.
- Page 18 Contents General Information ............... Introduction ....................Performance Specifi cations ............... Theory of Operation .............. Amplifi er Operation ..................Power Requirements ................. VHF Transmitter Amplifi er Current Consumption ........... 8 RF Circuitry ....................VHF Transmitter Amplifi er Lowpass Filter ............8 Power Control Circuitry ................
- Page 19 GENERAL INFORMATION Introduction The VHF Transmitter Amplifi er provides the fi nal stage of RF amplifi cation and fi ltering for the entire VHF Transmitter VT-3 132 - 174 MHz family and the VT-4 P25 Digital VHF Transmitters. The amplifi er has two distinct frequency ranges: 132 to 150 MHz, and 150 to 174 MHz with continuously adjustable 2.0 to 8.0 Watts output power.
- Page 20 General Information Performance Specifi cations Type: VHF Transmitter Amplifi er module for VT-3/150 , VT-4R and VT-4B series transmitters. Compatibility: MT-3 series FM Transmitter Main Board or MT-4 P25 Digital Transmitter Main Board. Frequency Range: 132-150 MHz or 150-174 MHz. RF Power Output: adjustable 2.0 to 8.0 Watts RF power Input:...
- Page 21 THEORY OF OPERATION VHF Transmitter Amplifi er Instruction Manual IM21-VT3150AMP...
- Page 22 VHF TRANSMITTER AMPLIFIER ALIGNMENT Repair Note The VHF Transmitter Amplifi er is mainly made up of surface mount devices that should not be removed or replaced using an ordinary soldering iron. Removal and replacement of surface mount components should be performed only with specifi...
- Page 23 ILLUSTRATIONS AND SCHEMATICS Printed Circuit Board Numbering Convention Daniels Electronics Ltd. has adopted a printed circuit board (PCB) numbering convention in which the last two digits of the circuit board number represent the circuit board version. All PCB’s manufactured by Daniels Electronics Ltd.
- Page 24 PARTS LISTS VHF Transmitter Amplifi er Electrical Parts List Desig Description Part Number VHF Transmitter Amplifi er Instruction Manual IM21-VT3150AMP...
- Page 25 REVISION HISTORY Revision Date Description VHF Transmitter Amplifi er Instruction Manual IM21-VT3150AMP...
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