Codan Radio Communications VT-30 AMP-2/145-30, AMP-2/155-30 & AMP-2/170-30 User Manual IM71 AMP2150 30 7 2 0 indb

Codan Radio Communications AMP-2/145-30, AMP-2/155-30 & AMP-2/170-30 IM71 AMP2150 30 7 2 0 indb

Users Guide

Document Number:Revision:Revision Date:Daniels Electronics Ltd.Victoria, BCPRINTED IN CANADAVHF AMP-2 30 W POWER AMPLIFIERINSTRUCTION MANUAL136 - 174 MHZCovers Models:AMP-2/145-30-00AMP-2/155-30-00AMP-2/170-30-00IM71-AMP2150-307-2-0Oct 2004Copyright © 2004 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.
VHF AMP-2 30 W Power Amplifi er Instruction ManualIM71-AMP2150-30 iiThis document has been produced, verifi ed and controlled in accordance with Daniels Electronics’ Quality Management System requirements.Please report any errors or problems to Daniels Electronics’ Customer Service Department.The user’s authority to operate this equipment could be revoked through any changes or modifi cations not expressly approved by Daniels Electronics Ltd.The design of this equipment is subject to change due to continuous development. This equipment may incorporate minor changes in detail from the information contained in this manual.DOCUMENT CONTROLNOTEDaniels Electonics Ltd. utilizes a three-level revision system. This system enables Daniels to identify the signifi cance of a revision. Each element of the revision number signifi es the scope of change as described in the diagram below.DOCUMENT REVISION DEFINITIONMajor Revisions: The result of a major change to product function, process or requirements.Minor Revisions: The result of a minor change to product, process or requirements.Editorial Revisions: The result of typing corrections or changes in formatting, grammar or wording.1-0-0Three-level revision numbers start at 1-0-0 for the fi rst release. The appropriate element of the revision number is incremented by 1 for each subsequent revision, causing any digits to the right to be reset to 0.For example:If the current revision = 2-1-1 Then the next major revision = 3-0-0If the current revision = 4-3-1 Then the next minor revision = 4-4-0If the current revision = 3-2-2 Then the next editorial revision = 3-2-3The complete revision history is provided at the back of the document.
VHF AMP-2 30 W Power Amplifi er Instruction ManualIM71-AMP2150-30 iiiRF Exposure WarningExposure to radio frequency (RF) energy has been identifi ed 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 fi eld strength and power density, listed in FCC 47 CFR § 1.1310. The FCC has furthermore determined that determination of compliance with these exposure limits, and preparation of an Environmental Assessment (EA) if the limits are exceeded, is necessary only for facilities, operations and transmitters that fall into certain risk categories, listed in FCC 47 CFR § 1.1307 (b), Table 1. All other facilities, operations and transmitters are categorically excluded from making such studies or preparing an EA, except as indicated in FCC 47 CFR §§ 1.1307 (c) and (d).Revised FCC OET Bulletin 65 (Edition 97-01) provides assistance in determining whether a proposed or existing transmitting facility, operation or device complies with 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. This exclusion is subject to the limits specifi ed in FCC 47 CFR §§ 1.1307 (b) and 1.1310. Daniels Electronics Ltd. has no reason to believe that this excluded transmitter encompasses exceptional characteristics that could cause non-compliance. Notes: • The FCC’s exposure guidelines constitute exposure limits, not emission limits. They are relevant to locations that are accessible to workers or members of the public. Such access can be restricted or controlled by appropriate means (i.e. fences, warning signs, etc.). • The FCC’s limits apply cumulatively to all sources of RF emissions affecting a given site. Sites exceeding these limits are subject to an EA and must provide test reports indicating compliance.RF Safety Guidelines and InformationBase and Repeater radio transmitters are designed to generate and radiate RF energy by means of an external antenna, typically mounted at a signifi cant height above ground to provide adequate signal coverage. The following antenna installation guidelines are extracted from Appendix A to OET Bulletin 65 and must be adhered to in order to ensure RF exposure compliance:Non-building-mounted Antennas: Height above ground level to lowest point of antenna ≥ 10 m or Power ≤ 1000W ERP (1640 W EIRP)Building-mounted Antennas: Power ≤ 1000 W ERP (1640 W EIRP)The following RF Safety Guidelines should be observed when working in or around transmitter sites: • Do not work on or around any transmitting antenna while RF power is applied. • Before working on an antenna, disable the appropriate transmitter and ensure a “DO NOT USE” or similar sign is placed on or near the PTT or key-up control. • Assume all antennas are active unless specifi cally indicated otherwise. • Never operate a transmitter with the cover removed. • Ensure all personnel entering a transmitter site have electromagnetic energy awareness training.For more information on RF energy exposure and compliance, please refer to the following: 1) FCC Code of Regulations; 47 CFR §§ 1.1307 and 1.1310. 2) FCC OET Bulletin 65, Edition 97-01, “Evaluating Compliance with FCC Guidelines for Human Exposure to Radiofrequency Electromagnetic Fields”. 3) http://www.fcc.gov/oet/rfsafety/
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VHF AMP-2 30 W Power Amplifi er Instruction ManualIM71-AMP2150-30 vContentsGeneral Information ...............................................................1Introduction ................................................................................................1Performance Specifi cations .......................................................................2Physical Specifi cations ..............................................................................3Theory of Operation ...............................................................5General ......................................................................................................5RF Sensor Circuitry ....................................................................................5RF Circuitry ................................................................................................6Installation and Site Operation ...............................................7VHF AMP-2 Alignment ...........................................................9Test Equipment List ....................................................................................9Amplifi er Alignment .................................................................................. 10Illustrations and Schematics ................................................ 13Printed Circuit Board Numbering Convention .......................................... 13VHF AMP-2 Power Amplifi er Block Diagram ............................................ 14VHF AMP-2 Power Amplifi er Exploded View ........................................... 15136 - 150 MHz VHF AMP-2 Amplifi er Board Component Layout ............. 16136 - 150 MHz VHF AMP-2 Amplifi er Board Schematic Diagram ............ 17150 - 162 MHz VHF AMP-2 Amplifi er Board Component Layout ............. 18150 - 162 MHz VHF AMP-2 Amplifi er Board Schematic Diagram ............ 19162 - 174 MHz VHF AMP-2 Amplifi er Board Component Layout ............. 20162 - 174 MHz VHF AMP-2 Amplifi er Board Schematic Diagram ............ 21VHF AMP-2 RF Sensor Board Component Layout .................................. 22VHF AMP-2 Sensor Board Schematic Diagram ....................................... 23Parts Lists ............................................................................ 25Amplifi er Board Electrical Parts List ......................................................... 25Amplifi er Board Mechanical Parts List ..................................................... 27RF Sensor Board Electrical Parts List ...................................................... 29Sensor Board Mechanical Parts List ........................................................ 30Front Panel Parts List .............................................................................. 31Revision History ................................................................... 33
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VHF AMP-2 30 W Power Amplifi er Instruction ManualIM71-AMP2150-301GENERAL INFORMATIONINTRODUCTIONThe MT-3 / MT-4 repeater system is a VHF / UHF radio system which is characterized by high performance and reliability under the most severe environmental conditions. The total system is designed to provide dependable, low maintenance performance, even in the most diffi cult circumstances.The MT-3 / MT-4 series of modules are packaged in the compact Euro standard (5”h x 2.8”w x 7.5”d) housing, and are robustly designed for urban, remote or transportable applications. Voltage stress testing is done over the range of +11 to +16 VDC which is followed by 24 hours of continuous operation at maximum rated power output.When the VT-3 / VT-4 transmitter is used as an exciter for the VHF AMP-2 power amplifi er (PA) module, it will provide an adjustable 20 to 30 W RF output over the 136 - 174 MHz VHF frequency range.The VHF AMP-2 family contains three models (AMP-2/145-30, AMP-2/155-30, AMP-2/170-30) covering three frequency bands 136 - 150 MHz, 150 - 162 MHz and 162 - 174 MHz respectively. The VHF AMP-2 power amplifi er (PA) mates with either of the MT-3 / MT-4 VHF transmitter exciter modules (the VT-3 transmitter exciter module or the VT-4 transmitter exciter module).
VHF AMP-2 30 W Power Amplifi er Instruction ManualIM71-AMP2150-30General Information2PERFORMANCE SPECIFICATIONSType: MT-2 Series Power Amplifi erFamily: AMP-2/150Models:AMP-2/145-30-00AMP-2/155-30-00AMP-2/170-30-00Compatibility: MT-3 and MT-4 Series Transmitter ExcitersFrequency Range: 136 - 174 MHzFrequency Bands:136 - 150 MHz150 - 162 MHz162 - 170 MHzRF Input Power: 2 - 4 WRF Output Power: Adjustable: 20 - 30 Watts (set by MT-3 or MT-4 exciter)Output Impedance: 50 ΩConducted Spurious & Harmonics:< -80 dBc (at 30 W output) Less than 0.3 µW (-35 dBm) absolute levelOperating Voltage: +13.8 VDC nominal, range +11 to +16 VDCTransmit Current: 3.5 to 5.5 A at 30 W 136 - 174 MHzStandby Current: Minimum 2 mA options 20 mAThermal: Thermal interlock disables at 80°C (175°F)Fan activated at 40°C (105°F)Duty Cycle: • Continuous (with Fan) -40°C to +60°C OperationExciter VT-3 and VT-4 4 W max. output for 30 W P.A.IC Number: • 142A-AMP2150FCC ID: • H4JVT-30Emission Designator: F1D, F1E, F3D, F3E
VHF AMP-2 30 W Power Amplifi er Instruction ManualIM71-AMP2150-30General Information 3PHYSICAL SPECIFICATIONSPhysical Dimensions: Width:14.2 cm (5.6”)Height:12.8 cm (5.05”)Depth:20.5 cm (8.1”)Weight: 1.6 kg (3.5 lb)Operating Temperature Range: -40°C to +60°COperating Humidity: Up to 95% R.H. at 25°CRF Connectors: Type N StandardCorrosion Prevention: Anodized aluminum construction. Stainless steel hardware. Features:• Heavy Duty Aluminum Heatsink• Thermal switched Fan (at 40°C)• RF Power and Over temp Indicators• Optional Unit Power Indicator
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VHF AMP-2 30 W Power Amplifi er Instruction ManualIM71-AMP2150-307INSTALLATION AND SITE OPERATIONThe VHF AMP-2 RF power amplifi er is approved for operation with the VT-3 or VT-4 exciter. Complete MT-3 subracks shipped directly from the factory are normally set to the appropriate options and O/P power calibration as requested by the customer. These units require no recalibration. For VHF AMP-2 RF power amplifi ers shipped separately from the MT-3/MT-4 racks, install as outlined in this section.
VHF AMP-2 30 W Power Amplifi er Instruction ManualIM71-AMP2150-30Installation and Site Operation81) Confi rm exciter and PA are aligned for the same frequency. (See Alignment Procedure).2) Remove the blank cover plates or TX-RX pair in the “B” System subrack slots.3) Install the VHF AMP-2 in slot 36 (visible via the marker hole on the upper left VHF AMP-2 front panel).Note: If the unit is set up with the extender card there will be a voltage drop of +1 to +1.5 VDC when the power amplifi er is transmitting. This voltage drop must be compensated for valid power O/P readings. Adjust the power supply for +13.8 VDC at the power amplifi er.4) Connect the output of the exciter to the input of the VHF AMP-2 power amplifi er with the cable provided.5) Connect the antenna system and key the transmitter. The LED indicators are defi ned as follows: Power Indicator: (optional) Indicates +13.8 VDC is applied to the transmitter when the ON-OFF switch is activated. An internal connector on the sensor PCB disables the power indicator LED in the event standby LED current drain must be eliminated. TX Indicator: Indicates that a preset forward RF power level is present at the transmitter output. The threshold level is internally adjustable for various RF output levels over the 20 - 30 W range. OT Indicator: (Over Temperature) A thermostat control switch interrupts the input supply voltage (nominally +13.8 VDC) to the PA when the heat sink temperature exceeds 175°F (80°C). The over temp thermostat will reset at 145°F (63°C), thus providing hysteresis. The OT indicator is only operational when exciter drive is present.The fan is activated automatically when the VHF PA O/P transistor temperature sensor reaches +40°C. The fan’s operating temperature range is -20°C to +60°C. The fan sensor will not activate the fan when ambient temperature is below -20°C.

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