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

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Document ID	494001
Application ID	i+ZQ0S1UqFY8PSA5YmWzFg==
Document Description	Users Guide
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Document Type	User Manual
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Filesize	39.81kB (497624 bits)
Date Submitted	2004-12-03 00:00:00
Date Available	2005-01-18 00:00:00
Creation Date	2004-11-10 10:33:37
Producing Software	Acrobat Distiller 5.0.5 (Windows)
Document Lastmod	2004-12-02 12:12:32
Document Title	IM71-AMP2150-30-7-2-0.indb
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Document Author:	edaniels

VHF AMP-2 30 W
POWER AMPLIFIER
INSTRUCTION MANUAL
136 - 174 MHZ
Covers Models:
AMP-2/145-30-00
AMP-2/155-30-00
AMP-2/170-30-00
Copyright © 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 Office.
Document Number:
Revision:
Revision Date:
IM71-AMP2150-30
7-2-0
Oct 2004
Daniels Electronics Ltd.
Victoria, BC
PRINTED IN CANADA
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.
DOCUMENT REVISION
DEFINITION
Daniels Electonics Ltd. utilizes a three-level revision system. This system
enables Daniels to identify the significance of a revision. Each element
of the revision number signifies the scope of change as described in the
diagram below.
1-0-0
Major 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.
Three-level revision numbers start at 1-0-0 for the first 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 = 3-0-0
If the current revision = 4-3-1 Then the next minor revision = 4-4-0
If the current revision = 3-2-2 Then the next editorial revision = 3-2-3
The complete revision history is provided at the back of the document.
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. This equipment may incorporate minor changes in detail
from the information contained in this manual.
VHF AMP-2 30 W Power Amplifier Instruction Manual
IM71-AMP2150-30
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. 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 sufficient basis for assuming compliance
with FCC MPE limits. This exclusion is subject to the limits specified 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 Information
Base and Repeater radio transmitters are designed to generate and radiate RF energy by means of an external
antenna, typically mounted at a significant 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 specifically 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/
VHF AMP-2 30 W Power Amplifier Instruction Manual
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v
Contents
General Information ............................................................... 1
Introduction ................................................................................................ 1
Performance Specifications ....................................................................... 2
Physical Specifications .............................................................................. 3
Theory of Operation ............................................................... 5
General ...................................................................................................... 5
RF Sensor Circuitry .................................................................................... 5
RF Circuitry ................................................................................................ 6
Installation and Site Operation ............................................... 7
VHF AMP-2 Alignment ........................................................... 9
Test Equipment List .................................................................................... 9
Amplifier Alignment .................................................................................. 10
Illustrations and Schematics ................................................ 13
Printed Circuit Board Numbering Convention .......................................... 13
VHF AMP-2 Power Amplifier Block Diagram ............................................ 14
VHF AMP-2 Power Amplifier Exploded View ........................................... 15
136 - 150 MHz VHF AMP-2 Amplifier Board Component Layout ............. 16
136 - 150 MHz VHF AMP-2 Amplifier Board Schematic Diagram ............ 17
150 - 162 MHz VHF AMP-2 Amplifier Board Component Layout ............. 18
150 - 162 MHz VHF AMP-2 Amplifier Board Schematic Diagram ............ 19
162 - 174 MHz VHF AMP-2 Amplifier Board Component Layout ............. 20
162 - 174 MHz VHF AMP-2 Amplifier Board Schematic Diagram ............ 21
VHF AMP-2 RF Sensor Board Component Layout .................................. 22
VHF AMP-2 Sensor Board Schematic Diagram ....................................... 23
Parts Lists ............................................................................ 25
Amplifier Board Electrical Parts List ......................................................... 25
Amplifier Board Mechanical Parts List ..................................................... 27
RF Sensor Board Electrical Parts List ...................................................... 29
Sensor Board Mechanical Parts List ........................................................ 30
Front Panel Parts List .............................................................................. 31
Revision History ................................................................... 33
VHF AMP-2 30 W Power Amplifier Instruction Manual
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1
GENERAL
INFORMATION
IN TR OD U C TION
The 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
difficult 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 amplifier
(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 amplifier (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 Amplifier Instruction Manual
IM71-AMP2150-30
2
General Information
P E R F O R M A N C E S P E C I F I C AT I O N S
Type:
MT-2 Series Power Amplifier
Family:
AMP-2/150
Models:
AMP-2/145-30-00
AMP-2/155-30-00
AMP-2/170-30-00
Compatibility:
MT-3 and MT-4 Series Transmitter Exciters
Frequency Range:
136 - 174 MHz
Frequency Bands:
136 - 150 MHz
150 - 162 MHz
162 - 170 MHz
RF Input Power:
2-4W
RF Output Power:
Adjustable: 20 - 30 Watts (set by MT-3 or MT-4 exciter)
Output Impedance:
50 Ω
Conducted Spurious
& Harmonics:
< -80 dBc (at 30 W output)
Less than 0.3 µW (-35 dBm) absolute level
Operating Voltage:
+13.8 VDC nominal, range +11 to +16 VDC
Transmit Current:
3.5 to 5.5 A at 30 W 136 - 174 MHz
Standby Current:
Minimum 2 mA options 20 mA
Thermal:
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 Operation
Exciter
VT-3 and VT-4 4 W max. output for 30 W P.A.
IC Number:
• 142A-AMP2150
FCC ID:
• H4JVT-30
Emission Designator:
F1D, F1E, F3D, F3E
VHF AMP-2 30 W Power Amplifier Instruction Manual
IM71-AMP2150-30
General Information
P H Y SICAL SPECIFICAT ION S
Physical 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°C
Operating Humidity:
Up to 95% R.H. at 25°C
RF Connectors:
Type N Standard
Corrosion 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
VHF AMP-2 30 W Power Amplifier Instruction Manual
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7
INSTALLATION AND
SITE OPERATION
The VHF AMP-2 RF power amplifier 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 amplifiers shipped
separately from the MT-3/MT-4 racks, install as
outlined in this section.
VHF AMP-2 30 W Power Amplifier Instruction Manual
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8
Installation and Site Operation
1) Confirm 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 AMP2 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 amplifier
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 amplifier.
4) Connect the output of the exciter to the input
of the VHF AMP-2 power amplifier with the
cable provided.
5) Connect the antenna system and key the
transmitter. The LED indicators are defined
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.
VHF AMP-2 30 W Power Amplifier Instruction Manual
IM71-AMP2150-30
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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