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P25 Digital VHF Transmitter Instruction Manual

IM21-001

23

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 identi

fi

ed by one of the following numbering

conventions:

PCB number

43-912010

Indicates circuit board version 1.0

PCB number

50002-02

Indicates circuit board version 2

(no decimal version)

ILLUSTRATIONS

AND SCHEMATICS

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Summary of Contents for A21-VPA145-08

Page 1: ...eval 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 IM21 001 1 0 0 Aug 2003 Daniels Electronics Ltd Victoria BC PRINTED IN CANADA Modu...

Page 2: ...s or problems to Daniels Electronics Customer Service Department 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 DOC...

Page 3: ... Board Alignment 15 Repeater System Configuration 19 Digital Repeater 19 Repeater System Troubleshooting 20 Illustrations and Schematics 23 P25 Digital Transmitter Front Panel 24 P25 Digital Transmitter Block Diagram 25 P25 Digital Transmitter Main Board Component Layout Bottom 26 P25 Digital Transmitter Main Board Component Layout Top 27 P25 Digital Transmitter Schematic Diagram 28 P25 Adapter Bo...

Page 4: ...tup and alignment procedures relevant to the particular module The following sub manual is contained within this modular manual VHF Amplifier Instruction Manual This manual provides information on alignment and operation of the 2 and 8 Watt RF amplifier modules The following manual is also required for alignment of the VT 4D family transmitter Radio Service Software Manual This manual provides ins...

Page 5: ...c to individual modules may be found in their respective sub manuals Type MT 4D Series Transmitter Family VT 4D150 136 174 MHz Compatibility MT 2 MT 3 and MT 4 Series Radio Systems P25 interoperable Frequency Range 136 to 150 MHz 150 to 174 MHz RF Power Output 0 5 to 2 0 or 2 0 to 8 0 W Continuous Modulation Analog 11K0F3E or 16K0F3E Frequency Modulation Project 25 8K10F1E System Impedance 50 Ω Ty...

Page 6: ...nsmitter with no Standby 75 mA encryption modules installed Transmitter with encryption Standby 105 mA modules installed DOC Type Approval TBA FCC Type Acceptance TBA Audio Specifications Audio Input Balanced 600Ω or optional unbalanced input 600 Ω or 15000Ω selectable input impedance Audio Response Pre emphasis 6 dB per octave 1 to 3 dB from 300 Hz to 3 kHz Audio Deviation Limiting 2 5 kHz 5 0 kH...

Page 7: ...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 Motherboard Connections Audio Power and Control are made through a 48 pin gold plated type F connector on the rear of the transmitter module User connection made through mated mother board assemb...

Page 8: ...P25 Digital VHF Transmitter Instruction Manual IM21 001 5 THEORY OF OPERATION ...

Page 9: ...al 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 When removing Surface Mount Solder Jumpers it is recommended to use solder braid in place of manual vacuum type desoldering tools This will help prevent damage to the circuit boards TRANSMITTER ASSEMBLY AND ...

Page 10: ...P25 Digital VHF Transmitter Instruction Manual IM21 001 19 REPEATER SYSTEM CONFIGURATION ...

Page 11: ...g 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 0 PCB number 50002 02 Indicates circuit board version 2 no decimal version ILLUSTRATIONS AND SCHEMATICS ...

Page 12: ...25 6 16 26 7 17 27 8 18 28 9 19 29 10 20 30 A P25 TRANSMITTER TRANSMITTER MODEL IDENTIFIER MICROPHONE MODE SELECTION SWITCH TYPE N RF OUTPUT JACK Antenna RJ45 CONNECTORS FACTORY SET OPERATING FREQUENCY MADE IN CANADA VT 4D150 ANALOG TRANSMIT LED 155 000 CNTL BUS A B MIC RF OUT A D OFF KEY TX NORM FREQUENCY MHz MADE IN CANADA DANIELS ELECTRONICS LTD TM DIGITAL TRANSMIT LED MIC MODE DIGITAL ANALOG O...

Page 13: ...P25 Digital VHF Transmitter Instruction Manual IM21 001 31 P25 Digital Transmitter Electrical Parts List Ref Desig Description Part Number PARTS LISTS ...

Page 14: ...P25 Digital VHF Transmitter Instruction Manual IM21 001 37 Revision Date ECO Description REVISION HISTORY ...

Page 15: ...tored 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 IM21 VT3150AMP 3 3 0 Aug 2003 Daniels Electronics Ltd Victoria BC ...

Page 16: ...ors or problems to Daniels Electronics Customer Service Department 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 D...

Page 17: ...s 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 Sa...

Page 18: ...t List 12 General 12 Standard Factory Settings and Jumper Configuration 13 VHF Transmitter Amplifier Alignment 13 VHF Transmitter Amplifier Adjustment 13 General Set Up 14 Output Power Alarm Forward Power 14 Output Power 15 Antenna VSWR Alarm Reverse Power 15 Antenna VSWR Overload 16 Procedure Verification 16 Illustrations and Schematics 17 VT 3 150 Tranmitter Amplifier Component Layout 18 VT 3 15...

Page 19: ...case that ensures optimum RF shielding provides a good ground and also acts as a heatsink Additionally the VHF Transmitter Amplifier is equipped with output power and VSWR sensing lines that can be individually configured as open collector or linear outputs The internal VSWR sensor protects the amplifier from high antenna VSWR by approximately halving the amplifier s RF gain when a VSWR overload c...

Page 20: ...3 1 max VSWR Input Output Isolation 60 dB Duty Cycle 100 Continuous operation from 40 C to 60 C Harmonic Emissions 90 dBc Transmitter Mismatch Protection 20 1 VSWR at all phase angles Transmitter Alarm Forward power sense and reverse VSWR open collector output separate or OR ed configuration linear output separate lines only Operating Temperature Range 30 C to 60 C optional 40 C temperature test O...

Page 21: ...VHF Transmitter Amplifier Instruction Manual IM21 VT3150AMP 3 THEORY OF OPERATION ...

Page 22: ...aced 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 When removing Surface Mount Solder Jumpers it is recommended to use solder braid in place of manual vacuum type desoldering tools This will help prevent damage to...

Page 23: ...ing 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 0 PCB number 50002 02 Indicates circuit board version 2 no decimal version ILLUSTRATIONS AND SCHEMATICS ...

Page 24: ...VHF Transmitter Amplifier Instruction Manual IM21 VT3150AMP 17 VHF Transmitter Amplifier Electrical Parts List Ref Desig Description Part Number PARTS LISTS ...

Page 25: ...VHF Transmitter Amplifier Instruction Manual IM21 VT3150AMP 21 Revision Date ECO Description REVISION HISTORY ...

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