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.
ii DOCUMENT CONTROL This document has been produced, verified and 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 modifications not expressly approved by Daniels Electronics Ltd. The design of this equipment is subject to change due to continuous development.
iii Contents General Information ............................................................... 1 Introduction ................................................................................................ 1 Performance Specifications ....................................................................... 2 Theory of Operation ............................................................... 5 General ......................................................................................................
1 GENERAL INFORMATION Manual Organization The organization of this document reflects 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: 1. A functional description and specification summary. 2. A detailed technical description (Theory of Operation). 3. Assembly, setup and alignment procedures relevant to the particular module.
2 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 • VT-4D160-2 150-174 MHz band, 0.5-2.0 Watt • VT-4D160-8 150-174 MHz band, 2.0-8.0 Watt The transmitters’ band of operation is determined by select components in the amplifier.
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 infinity. (Default 5 min.), using Radio Service Software package.
4 This Page Intentionally Left Blank Physical Specifications Physical Dimensions: Width: Height: Depth: 7.1 cm (2.8 in) 12.8 cm (5.05 in) 19 cm (7.5 in) Module Weight: 1.4 kg (3.0 lbs.) Corrosion Prevention: 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.
5 THEORY OF OPERATION P25 Digital VHF Transmitter Instruction Manual IM21-001
13 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 specifically designed surface mount rework and repair stations complete with ElectroStatic Discharge (ESD) protection.
19 REPEATER SYSTEM CONFIGURATION P25 Digital VHF Transmitter Instruction Manual IM21-001
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. are identified by one of the following numbering conventions: PCB number 43-912010 Indicates circuit board version 1.
24 Illustrations and Schematics P25 Digital Transmitter Front Panel P25 TRANSMITTER FACTORY SET OPERATING FREQUENCY FREQUENCY (MHz) 155.000 ANALOG TRANSMIT LED A D DIGITAL TRANSMIT LED NORM OFF KEY TX ON / OFF / KEY SWITCH ANALOG DIGITAL MIC MODE MICROPHONE MODE SELECTION SWITCH A CNTL BUS B RJ45 CONNECTORS RF OUT MIC DANIELS TYPE N RF OUTPUT JACK (Antenna) TM ELECTRONICS LTD. MADE IN CANADA MADE IN CANADA VT-4D150 TRANSMITTER MODEL IDENTIFIER DANIELS 1 TM ELECTRONICS LTD.
31 PARTS LISTS P25 Digital Transmitter Electrical Parts List Ref Desig Description Part Number P25 Digital VHF Transmitter Instruction Manual IM21-001
37 REVISION HISTORY Revision Date ECO Description P25 Digital VHF Transmitter Instruction Manual IM21-001
VHF TRANSMITTER AMPLIFIER INSTRUCTION MANUAL VT-3 & VT-4 (132-174 MHz) Covers Models: A21-VPA145-08 A21-VPA165-08 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.
ii DOCUMENT CONTROL This document has been produced, verified and 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 modifications not expressly approved by Daniels Electronics Ltd. The design of this equipment is subject to change due to continuous development.
iii RF Exposure Warning Exposure to radio frequency (RF) energy has been identified as a potential environmental factor that must be considered before a radio transmitter can be authorized or licensed. The FCC has therefore developed maximum permissible exposure (MPE) limits for field strength and power density, listed in FCC 47 CFR § 1.1310.
v Contents General Information ............................................................... 5 Introduction ................................................................................................ 5 Performance Specifications ....................................................................... 6 Theory of Operation .............................................................. 7 Amplifier Operation ....................................................................................
1 GENERAL INFORMATION Introduction The VHF Transmitter Amplifier provides the final stage of RF amplification and filtering for the entire VHF Transmitter VT-3 132 - 174 MHz family and the VT-4 P25 Digital VHF Transmitters. The amplifier 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. This Amplifier is housed in a machined aluminum case that ensures optimum RF shielding, provides a good ground, and also acts as a heatsink.
2 General Information Performance Specifications Type: VHF Transmitter Amplifier 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: nominal level adjustable from 0 dBm to +5 dBm, held within +/- 2 dB of nominal. Output Impedance and VSWR: 50 Ω, Type N connector; 3:1 max. VSWR.
3 THEORY OF OPERATION VHF Transmitter Amplifier Instruction Manual IM21-VT3150AMP
7 VHF TRANSMITTER AMPLIFIER ALIGNMENT Repair Note The VHF Transmitter Amplifier 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 specifically designed surface mount rework and repair stations complete with Electrostatic Dissipative (ESD) protection.
17 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. are identified by one of the following numbering conventions: PCB number 43-912010 Indicates circuit board version 1.
17 PARTS LISTS VHF Transmitter Amplifier Electrical Parts List Ref Desig Description Part Number VHF Transmitter Amplifier Instruction Manual IM21-VT3150AMP
21 REVISION HISTORY Revision Date ECO Description VHF Transmitter Amplifier Instruction Manual IM21-VT3150AMP
