Codan Radio Communications VT-3H040-S-HSO VT-3H040 VHF Transmitter User Manual IM20 VT3H040 1 Rev A Master
Codan Radio Communications VT-3H040 VHF Transmitter IM20 VT3H040 1 Rev A Master
Users Guide
DANIELS
ELECTRONICS LTD.
TM
MT-3 RADIO SYSTEMS
VHF ENHANCED
TRANSMITTER
INSTRUCTION
MANUAL
Covers model: VT-3H035-SWA3, VT-3H045-SWA3
Copyright © 1998 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 Electronics Ltd. registered in the United States Patent
and Trademark Office.
Issue: 1 Rev A Previous Issue: 1
Issue Date: September 98 Previous Issue Date: July 97 Daniels Electronics Ltd.
Printing Date: Month Year Victoria, B.C.
Part No.: IM20-VT3H040 PRINTED IN CANADA
DEDANIELS
ELECTRONICS
ii VT-3H040 VHF Enhanced Transmitter Instruction Manual
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. This equipment may incorporate minor changes in detail from
the information contained in this manual.
DEDANIELS
ELECTRONICS
VT-3H040 VHF Enhanced Transmitter Instruction Manual iii
TABLE OF CONTENTS
Page
1 GENERAL
1.1 Introduction.................................................................................................... 1-1
1.2 Manual Organization ..................................................................................... 1-1
1.3 VT-3H040 Transmitter Family Models......................................................... 1-2
1.4 Performance Specifications ........................................................................... 1-3
1.4.1 General............................................................................................... 1-3
1.4.2 Audio Specifications.......................................................................... 1-5
1.4.3 Physical Specifications ...................................................................... 1-6
2 SYSTEM OVERVIEW
2.1 Transmitter Operation.................................................................................... 2-1
2.2 Frequency Selection....................................................................................... 2-2
2.3 Transmitter Assembly and Adjustment ......................................................... 2-2
2.3.1 Complete Transmitter Alignment ...................................................... 2-3
2.3.2 Frequency Change ............................................................................. 2-3
2.3.3 Output Power Adjustment.................................................................. 2-4
2.3.4 Deviation Setting ............................................................................... 2-5
2.3.5 Setting RF Alarm Thresholds ............................................................ 2-5
2.4 Recommended Test Equipment List.............................................................. 2-5
2.5 Repair Note .................................................................................................... 2-6
2.6 Printed Circuitboard Numbering Convention................................................ 2-6
3 ILLUSTRATIONS
3.1 MT-3 Transmitter Front Panel....................................................................... 3-1
3.2 MT-3 Transmitter Case - Exploded View ..................................................... 3-2
4 PARTS LISTS ........................................................................................................... 4-1
5 REVISION HISTORY............................................................................................... 5-1
MODULE MANUALS
Transmitter Main Board Instruction Manual ....................................IM20-MT3TXMN
VT3H040 VHF Amplifier Instruction Manual .............................. IM20-VT3040AMP
OS-3A/H Enhanced Synthsizer Instruction Manual 29-470 MHz ......... IM10-OS3AH
VT-3H040 Channel Designation Table .......................................... IM20-VT3H040CT
DEDANIELS
ELECTRONICS
VT-3H040 VHF Enhanced Transmitter Instruction Manual 1
1 GENERAL
1.1 Introduction
The VT-3H040 transmitter is a low power, synthesized FM transmitter capable of operating in
20 kHz or 25 kHz channels and within one of two bands: 29 MHz to 38 MHz or 38 MHz to 50
MHz. The transmitter is rated for continuous duty at an RF output power of 3.0 Watt. The RF
output power level is preset at the factory. A modular design allows each of the transmitter's
modules; MT-3 Transmitter Main Board, MT-3 Audio Processor, VT-3H040 Amplifier and OS-
3H040 Synthesizer to be individually assembled and tested. This facilitates construction, tuning,
maintainance as well as troubleshooting procedures. The synthesizer module can be programmed
to have up to 16 channels exclusive to one frequency band.
The VT-3H040 Transmitter is designed to interface with Daniels Electronics' MT-3 Repeater
System while maintaining MT-2 System compatibility. Both radio systems are characterized by
dependable, low maintanence performance under the most severe environmental conditions.
1.2 Manual Organization
The organization of this manual reflects the modular makeup of the VT-3 product line. Each
module is fully described within its respective submanual, all of which are contained within this
document. In general, each submanual contains:
1. A functional description and specification summary,
2. a detailed technical description (Theory of Operation) and
3. assembly, setup and alignment procedures relevent to that particular module.
The module manuals are as follows.
Note: material presented in a given "sub-manual" may include information related to other
module versions not directly appllicable to the VT-3H040 Transmitter family (eg, the OS-3H
Synthesizer Instruction Manual covers models from 29 MHz to 512 MHz).
Transmitter Manual: This manual provides an overview of the complete transmitter, manual
organization and assembly in terms of the other modules.
MT-3 Transmitter Main Board: This manual pertains to the audio processor module, transmitter
Main Board and Front Panel Board. Most of the user selectable options are accessed within the
Transmitter Main Board module, including channel selection. Since all external connections
(including power and signal lines) are made to the Transmitter Main Board, most of the material
pertaining to transmitter operation and installation is found here.
DEDANIELS
ELECTRONICS
2 VT-3H040 VHF Enhanced Transmitter Instruction Manual
VT-3H040 VHF Amplifier: The amplifier module provides the final stages of RF power
amplification and harmonic filtering for the transmitter. This manual is intended primarily as a
reference since the amplifier module is adjusted at the factory.
OS-3H040 Synthesizer: This manual pertains to the synthesizer module. Channel selection is
described in the 'Transmitter Main Board' Manual.
VT-3H040 Channel Designation Table: This document relates operating frequency to the
transmitter channel number (see section 2.1).
1.3 VT-3H040 Transmitter Family Models
The VT-3H040 line of transmitters has a single RF power output rating of 3.0 Watt, with wide
band FM (20 kHz or 25 kHz channels) and employs synthesizer based frequency generation. The
two basic (i.e. no options added) band specific models of the transmitter are as follows:
VT-3H035-SWA3: 29 MHz to 38 MHz
VT-3H045-SWA3 38 MHz to 50 MHz
The frequency is determined by the model of synthesizer and by the lowpass filter that is
installed in the amplifier module (see the VT-3H040 VHF Amplifier manual for details). A
group of channels spanning 38 MHz can be accomodated by one of the models providing that the
frequency span does not exceed 1.0 MHz. Model VT-3H035-SWA3 can operate at frequencies
up to 38.5 MHz and is the preferred choice when spanning 38 MHz. Consult the factory for
futher information regarding operation around this frequency.
DEDANIELS
ELECTRONICS
VT-3H040 VHF Enhanced Transmitter Instruction Manual 3
1.4 Performance Specifications
1.4.1 General
The following is a general set of specifications for the generic VT-3H040 transmitter. Additional
specifications, specific to individual modules may be found in their respective submanuals.
Type: MT-3 Series Transmitter
Family: VT-3H040
Compatibility: MT-2 Series and MT-3 Series Radio Systems
Frequency Range: 29.0 MHz to 50.0 MHz
RF Power Output: 3.0 Watt Fixed (± 1.5 dB with temperature and
supply voltage).
System Impedance: 50 Ω ; Type N connector.
Duty Cycle: 100%: Continuous operation from -30˚ C to +60˚C
(optional -40˚ C to +60˚C).
Harmonic Emissions: More than 90 dB below carrier.
Spurious Emissions: More than 80 dB below carrier.
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);
- linear output (separate lines only).
Modulation: 16K0F3E
Synthesizer Reference Frequency: 9.600000 MHz or 10.000000 MHz ; selectable.
Channel Spacing: 20 / 25 kHz
Frequency Stability: Standard: ±1 ppm, -30˚C to +60˚C,
optional -40˚C to +60˚C
Channel Selection: In 5 kHz or 6.25 kHz increments selected through
four internal BCD rotary switches. Preset capability
for 16 channel memory selectable through external
control.
DEDANIELS
ELECTRONICS
4 VT-3H040 VHF Enhanced Transmitter Instruction Manual
Standby Current and rise time: 95 % RF power, 95 % system deviation within;
(See also 'Transmitter Main • 10 ms: typ. 185 mA (Mode 4);
Board Instruction Manual) • 25 ms: typ. 160 mA (Mode 2);
• 50 ms: typ. 15 mA (Mode 1);
• Mode 3 not used in Synthesized Transmitters.
DOC Type Approval RSS119 Issue 6
FCC Type Acceptance: Parts 22, 90 FCC ID: H4JVT-3H040-S
Operating Temperature Range: -30˚ C to +60˚ C, optional -40˚ C temperature test.
Operating Humidity: 95% RH (non-condensing) at +25˚ C.
Operating Voltage: +13.8 Vdc Nominal (range +11 to +16 Vdc),
+9.5 Vdc Regulated.
Total Transmit Current: 0.8 Amp typical; 1.2 Amp maximum
Front Panel Controls: NORM (repeat mode), OFF, and KEY TX (Tx on).
PTT Activation: Active to ground with or without time-out timer.
Microphone activated with or without time-out
timer.
Front Panel switch: KEY TX - without time-out
timer; NORM - with or without time-out-timer;
Isolated (optional relay) with or without time-out
timer.
PTT Time Out Timer: Selectable from 1 sec. to 8 hrs. (factory set 5 min.).
DEDANIELS
ELECTRONICS
VT-3H040 VHF Enhanced Transmitter Instruction Manual 5
1.4.2 Audio Specifications
Audio Input: Balanced 600 ohm or unbalanced (optional).
Input level sensitivity, -25 dBm to 0 dBm.
Audio Response: Pre-emphasis (6 dB per octave); +1.0 to -2.0 dB
from 300 Hz to 3 kHz;
Flat Audio Response: +1 to -1 dB from 100 Hz to 3 kHz.
Audio Deviation: Preset to ±3.0 kHz with a 1 kHz tone.
Subtone Audio Input 1: 0.5 Vpp at 200 Hz for ±500 Hz deviation
(internally adjustable).
Subtone Audio Input 1 Frequency range: 60 Hz to 300 Hz.
Subtone Audio Input 2: 0.5 Vpp at 100 Hz for ±500 Hz deviation
(internally adjustable).
Subtone Audio Input 2 Frequency range: DC to 150 Hz.
Direct Modulation Input: 0.5 Vrms at 1 kHz or ±3 kHz deviation.
Direct Modulation Frequency range: DC to 5 kHz.
Audio Distortion: Less than 2.5% THD; 1 kHz tone at 1.5 kHz or
3 kHz deviation (-40°C to +60°C).
Hum and Noise: Better than 55 dB
(test receiver band limited: 400 Hz to 30 kHz).
DEDANIELS
ELECTRONICS
6 VT-3H040 VHF Enhanced Transmitter Instruction Manual
1.4.3 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: 1.5 kg (3.3 lbs)
Corrosion Prevention: Anodized aluminum construction. Stainless steel
hardware. Selectively conformal coated glass epoxy
2 and 4 layer printed circuitboards. 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. 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" assembly of
the repeater subrack. Type F standard connector
complies with DIN 41612 Level 2 (200 mating
cycles, 4 day 10 ppm SO2 gas test with no
functional impairment and no change in contact
resistance).
Handle Text Colour: Orange.
DEDANIELS
ELECTRONICS
VT-3H040 VHF Enhanced Transmitter Instruction Manual 3-1
3 ILLUSTRATIONS
3.1 MT-3 Transmitter Front Panel
VT3040M1
ON / OFF SWITCH
TYPE N RF
OUTPUT JACK
SMA REFERENCE
INPUT JACK
TRANSMIT INDICATOR LED
TRANSMITTER
MODEL IDENTIFIER
FACTORY SET
OPERATING
FREQUENCY
MICROPHONE
CONNECTOR
TRANSMITTER
TX
REFERENCE
INPUT
DANIELS
ELECTRONICS LTD.
OFF
NORM
KEY TX
MIC
RF OUT
FREQUENCY (MHz)
33.25000
MADE IN CANADA
VT-3H035-SWA3
MADE IN CANADA
MADE IN CANADA
ORANGE TEXT
DEDANIELS
ELECTRONICS
3-2 VT-3H040 VHF Enhanced Transmitter Instruction Manual
3.2 MT-3 Transmitter Case - Exploded View
3 FINGER GASKET (2)
A
A
A
A
B
B
B
B
MT3TXM2B
DEDANIELS
ELECTRONICS
VT-3H040 VHF Enhanced Transmitter Instruction Manual 5-1
5 REVISION HISTORY
ISSUE DATE DESCRIPTION AND (REASON)
DANIELS
ELECTRONICS LTD.
TM
MT-3 RADIO SYSTEMS
FM TRANSMITTER
MAIN BOARD
INSTRUCTION MANUAL
Covers: Main Board for
UT-3/xxx-xxxx UHF FM Transmitters and
VT-3/xxx-xxxx VHF FM Transmitters
With: Version 1.8 FM Audio Processor Board or
Version 2.3 FM Audio Processor Board
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 Office.
Printing Date: Apr 2003 Daniels Electronics Ltd.
Issue Date: Apr 2003 Previous Issue Date: Nov 98 Victoria, BC
Issue: 4Previous Issue: 3
Part No.: IM20-MT3TXMN PRINTED IN CANADA
ii Transmitter Main Board Instruction Manual IM20-MT3TXMN
Reviewed By:
Quality Assurance:
CLAUDIA BOORMAN
_________________
Quality Manager Signature Date
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.
Transmitter Main Board Instruction Manual IM20-MT3TXMN iii
TABLE OF CONTENTS
1 GENERAL .......................................................................................................................1-1
1.1 Introduction............................................................................................................1-1
1.2 Performance Specifications....................................................................................1-1
1.2.1 General Specifications......................................................................................1-1
1.2.2 Audio Specifications ........................................................................................1-2
2 THEORY OF OPERATION............................................................................................2-1
2.1 Transmitter Main Board.........................................................................................2-1
2.1.1 General Theory of Operation ...........................................................................2-1
2.1.2 Transmitter Push-To-Talk................................................................................2-1
2.1.2.1 Microphone PTT .........................................................................................2-1
2.1.2.2 PTT With Time-Out-Timer..........................................................................2-2
2.1.2.3 PTT No Time-Out-Timer.............................................................................2-2
2.1.2.4 PTT Relay....................................................................................................2-2
2.1.2.5 PTT Output..................................................................................................2-3
2.1.2.6 PTT Voltage Switching................................................................................2-3
2.1.3 Transmitter Standby Modes.............................................................................2-4
2.1.3.1 Audio Circuits..............................................................................................2-6
2.1.3.2 Microphone Audio.......................................................................................2-6
2.1.3.3 Received Audio............................................................................................2-6
2.1.4 Channel Selection.............................................................................................2-6
2.1.4.1 Synthesized Transmitter...............................................................................2-6
2.1.4.2 Crystal Controlled Transmitter.....................................................................2-7
2.1.5 Amplifier Circuits.............................................................................................2-7
2.1.6 Time-Out-Timer Circuitry................................................................................2-8
2.1.6.1 Optional Time-Out Timer on the Audio Processor Board............................2-8
2.2 MT-3 Front Panel Board........................................................................................2-10
2.3 Version 1.8 Audio Processor .................................................................................2-11
2.3.1 General.............................................................................................................2-11
2.3.2 Power Requirements ........................................................................................2-11
2.3.3 Audio Processor Turn-on Time........................................................................2-12
2.3.4 Audio Processor Signals..................................................................................2-12
2.3.4.1 Audio Processor Outputs.............................................................................2-12
2.3.4.2 Audio Processor Modulation Output...........................................................2-12
2.3.4.3 Audio Processor Low Frequency / Direct Mod. Output ..............................2-13
2.3.4.4 Audio Processor Inputs...............................................................................2-13
2.3.4.5 Audio Processor Microphone Input.............................................................2-13
2.3.4.6 Audio Processor Balanced Input..................................................................2-13
2.3.4.7 Audio Processor Auxiliary Input .................................................................2-14
2.3.4.8 Audio Processor Subtone Inputs.................................................................2-14
2.3.4.9 Audio Processor Direct Modulation Input...................................................2-14
iv Transmitter Main Board Instruction Manual IM20-MT3TXMN
2.4 Version 2.3 Audio Processor .................................................................................2-15
2.4.1 Introduction......................................................................................................2-15
2.4.2 Version 2.3 FM Audio Processor Block Diagram ...........................................2-17
2.4.3 Factory Configuration......................................................................................2-18
2.4.4 Turn-on Time...................................................................................................2-19
2.4.5 Low Frequency Modulation.............................................................................2-19
2.4.6 Audio Processor Signals..................................................................................2-20
2.4.6.1 FM Audio Processor Outputs......................................................................2-20
2.4.6.2 Audio Processor Modulation Outputs.........................................................2-20
2.4.6.3 Audio Processor Microphone Input.............................................................2-21
2.4.6.4 Audio Processor Balanced Input..................................................................2-21
2.4.6.5 Audio Processor Auxiliary Input .................................................................2-21
2.4.6.6 Audio Processor Subtone Inputs.................................................................2-22
2.4.6.7 Direct Modulation Input ..............................................................................2-22
2.4.6.8 Low Frequency Modulation.........................................................................2-22
2.4.7 Audio Processor Signal Paths (Version 2.3)....................................................2-23
3 TRANSMITTER ALIGNMENT .....................................................................................3-1
3.1 General...................................................................................................................3-1
3.2 Repair Note............................................................................................................3-1
3.3 Printed Circuit Board Numbering Convention .......................................................3-1
3.4 Recommended Test Equipment List.......................................................................3-2
3.5 Standard Factory Settings and Jumper Configuration............................................3-2
3.5.1 MT-3 Transmitter Main Board Factory Configuration.....................................3-2
3.6 MT-3 Transmitter Main Board Configuration........................................................3-4
3.6.1 General.............................................................................................................3-4
3.6.2 MT-3 Transmitter Main Board Test Points......................................................3-4
3.7 Module Installation and Removal...........................................................................3-5
3.8 Audio Processor Alignment ...................................................................................3-6
3.8.1 Multiple Channel Transmitters.........................................................................3-7
3.8.2 Audio Processor Version Identification and Adjustment Locations..................3-7
3.8.3 Audio Processor Alignment Procedures...........................................................3-9
3.8.3.1 Transmitters with Pre-Emphasis and CTCSS Subtone ................................3-9
3.8.3.2 Transmitters with Flat Audio and CTCSS subtone ......................................3-13
4 TROUBLESHOOTING ..................................................................................................4-1
4.1 Balanced Input Test................................................................................................4-1
4.2 Frequency Response Test ......................................................................................4-1
4.3 Subtone Input Test.................................................................................................4-1
5 TEMPERATURE COMPENSATION ............................................................................5-1
6 TRANSMITTER INTERCONNECT PIN DEFINITIONS ............................................6-1
7 AUDIO PROCESSOR JUMPER CONFIGURATIONS...............................................7-1
7.1 Version 1.8 Audio Processor Jumper Configuration..............................................7-1
7.2 Version 2.3 Audio Processor Jumper and Select Value Tables ..............................7-3
Transmitter Main Board Instruction Manual IM20-MT3TXMN v
7.2.1 Wideband VHF and UHF Synthesized Transmitters.......................................7-3
7.2.2 Narrowband VHF and UHF Synthesized Transmitters....................................7-4
7.2.3 Wideband Crystal Transmitters........................................................................7-6
7.2.4 Narrowband Crystal Transmitters ....................................................................7-7
7.2.5 LTRTM Configuration .......................................................................................7-8
8 ILLUSTRATIONS AND SCHEMATIC DIAGRAMS...................................................8-1
8.1 Transmitter Block Diagram....................................................................................8-1
8.2 Transmitter Main Board - Top Side Component Layout.......................................8-3
8.3 Transmitter Main Board - Bottom Side Component Layout...................................8-4
8.4 Transmitter Main Board - Schematic Diagram......................................................8-5
8.5 Front Panel Board - Component Layout ...............................................................8-6
8.6 Front Panel Board - Schematic Diagram...............................................................8-7
8.7 Version 1.8 Audio Processor - Component Layout................................................8-8
8.8 Version 1.8 Audio Processor - Schematic Diagram ..............................................8-9
8.9 Version 2.3 Audio Processor - Component Layout................................................8-10
8.10 Version 2.3 Audio Processor - Schematic Diagram ...............................................8-11
8.11 Optional Time Out Timer Assembly ......................................................................8-12
9 PARTS LISTS..................................................................................................................9-1
9.1 Transmitter Main Board Parts List.........................................................................9-1
9.1.1 Transmitter Main Board Electrical Parts List....................................................9-1
9.1.2 Transmitter Main Board Mechanical Parts List................................................9-3
9.1.3 MT-3 Front Panel Board Electrical Parts List ..................................................9-4
9.2 MT-3 Audio Processor Parts List (Version 1.8) ....................................................9-5
9.3 FM Audio Processor Parts List (Version 2.3)........................................................9-8
10 REVISION HISTORY.....................................................................................................10-1
vi Transmitter Main Board Instruction Manual IM20-MT3TXMN
LIST OF FIGURES
LIST OF TABLES
Figure 1 Audio Processor Block Diagram........................................................................2-17
Figure 2 Interconnection Pin Layout Diagram..................................................................2-18
Figure 3 Microphone and Balanced Input Circuitry, V2.3 Audio Processor .....................2-23
Figure 4 Limiter and Splatter Filter, V2.3 Audio Processor...............................................2-24
Figure 5 Bypassing Compression, V2.3 Audio Processor ................................................2-25
Figure 6 TX Audio Control Circuitry, V2.3 Audio Processor ...........................................2-26
Table 1 Mode Condition Table..........................................................................................2-4
Table 2 Standby Mode Selection Table.............................................................................2-5
Table 3 FM Audio Processor Total Current Consumption................................................2-5
Table 4 Time-Out-Timer Settings......................................................................................2-9
Table 5 MT-3 Audio Processor Current Consumption. ..................................................2-11
Table 6 Bandwidth Table.................................................................................................2-15
Table 7 Factory Configuration ........................................................................................2-18
Table 8 Turn on Time......................................................................................................2-19
Table 9 Transmitter Main Board Jumpers.........................................................................3-3
Table 10 Main Board Test Points........................................................................................3-4
Table 11 Waveform Levels..................................................................................................4-1
Table 12 Interconnection Pin Definitions ............................................................................6-1
Table 13 Audio Processor Version 1.8 Jumper Settings......................................................7-2
Table 14 Jumper and Select Values Table - Wideband Synthesized Transmitters ...............7-3
Table 15 Jumper and Select Values Table - Narrowband Synthesized Transmitters ............7-4
Table 17 Jumper and Select Values Table - Wideband Crystal Transmitters .......................7-6
Table 18 Jumper and Select Values Table - Narrowband Crystal Transmitters....................7-7
Table 19 Jumper and Select Values Table - LTRTM Modulated Transmitters.......................7-8
Transmitter Main Board Instruction Manual IM20-MT3TXMN 1-1
1 GENERAL
1.1 Introduction
The MT-3 Transmitter Main Board integrates the MT-3 Front Panel Board, MT-3 Audio
Processor, Synthesizer or Crystal Controlled Oscillator module, and Amplifier module together to
comprise a MT-3 series transmitter (see section 5.1: MT-3 Transmitter Block Diagram). The Front
Panel Board and the Audio Processor are soldered directly to the Transmitter Main Board while the
Amplifier and the Synthesizer or Crystal Controlled Oscillator module are frequency band
sensitive, plug-in modules. Circuitry and jumpers on the Transmitter Main Board control the
operation of the modules as well as the overall operation of the MT-3 transmitter. Power and signal
connections are made through the 48 pin type 'F' connector on the rear of the Transmitter Main
Board where they are then routed to the other MT-3 modules. The front and rear panels are
attached to the Transmitter Main Board and together with the extruded aluminum shell, form the
transmitter enclosure.
Note: LTRTM is a trademark of E.F. Johnson Co.
1.2 Performance Specifications
1.2.1 General Specifications
Type: MT-3 Series Transmitter
Compatibility: MT-3 Series Amplifier, OC-3 Crystal Controlled Oscillator
module, OS-3 and OS-3H Frequency Synthesizer modules.
Modulation: 11K0F3E or 16K0F3E (Frequency Modulation).
Operating Temperature Range: -30˚C to +60˚C, optional -40˚C to +60˚C temperature test.
Operating Humidity: 95% RH (non-condensing) at +25°C.
Operating Voltage: +9.5 VDC Regulated. +13.8 VDC Nominal (11 - 16 VDC).
Front Panel Controls: NORM (repeat mode), OFF, and KEY TX (TX on).
1-2 Transmitter Main Board Instruction Manual IM20-MT3TXMN
PTT Activation: • Active to ground with or without time-out-timer.
• Microphone activated with or without time-out-timer.
• Front Panel switch: KEY TX - without time-out-timer.
• NORM - with or without time-out-timer.
• Isolated (optional relay) with or without time-out-timer.
PTT Time-Out-Timer: Selectable from 1 sec. to 8 hrs. (Factory Default: 5 min.).
1.2.2 Audio Specifications
Audio Input: Balanced 600 ohm or unbalanced (optional).
Input level sensitivity, -25 dBm to 0 dBm.
Audio Response: Pre-emphasis (6 dB per octave); +1.0 to -1.0 dB
from 500 Hz to 2.5 kHz;
Flat Audio Response: +1 to -1 dB from 300 Hz to 2.5 kHz.
Audio Deviation: Preset to ±1.5 kHz (Narrow Band) or ±3.0 kHz (Wide Band)
with a 1 kHz tone (capable ±2.5 kHz or ±5.0 kHz).
Subtone Audio Input 1: 0.5 Vpp at 200 Hz for ±500 Hz deviation
(internally adjustable).
Subtone Audio Input 1 Frequency range: 60 Hz to 300 Hz.
Subtone Audio Input 2: 0.5 Vpp at 100 Hz for ±500 Hz deviation
(internally adjustable).
Subtone Audio Input 2 Frequency range: DC to 150 Hz.
Direct Modulation Input: 0.5 Vrms at 1 kHz or ±3 kHz deviation.
Direct Modulation Frequency range: DC to 5 kHz.
Transmitter Main Board Instruction Manual IM20-MT3TXMN 10-1
10 REVISION HISTORY
Issue Issued Revised Details
MT-3 RADIO SYSTEMS
VHF AMPLIFIER
INSTRUCTION MANUAL
VT-3
29 - 50 MHz
Covers Models: VT-3H040 Amplifier
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.
Issue: 3 Previous Issue: 2
Issue Date: Feb 03 Previous Issue Date: June 97 Daniels Electronics Ltd.
Printing Date: Feb 03 Victoria, B.C.
Part No.: IM20-VT3040AMP PRINTED IN CANADA
DANIELS
ELECTRONICS LTD.
TM
ii IM20-VT3040AMP VT-3H040 VHF Amplifier Instruction Manual
Reviewed By:
Quality Assurance:
CLAUDIA BOORMAN _________________
Quality Manager Signature Date
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.
DANIELS
ELECTRONICS LTD.
TM
VT-3H040 VHF Amplifier Instruction Manual IM20-VT3040AMP iii
TABLE OF CONTENTS
Page
1 GENERAL....................................................................................................................1-1
1.1 Introduction.......................................................................................................1-1
1.2 Performance Specification................................................................................1-1
2 THEORY OF OPERATION.........................................................................................2-1
2.1 Amplifier Operation..........................................................................................2-1
2.2 Power Requirements .........................................................................................2-1
2.3 RF Circuitry ......................................................................................................2-1
2.3.1 VT-3H040 Lowpass Filter ................................................................................2-2
2.4 Power Control Circuitry....................................................................................2-2
2.5 Power Sensing Circuitry ...................................................................................2-3
2.5.1 Output Power Sense..........................................................................................2-3
2.5.2 VSWR Sense.....................................................................................................2-4
2.5.3 VSWR Overload ...............................................................................................2-4
3 VT-3H040 AMPLIFIER ALIGNMENT ......................................................................3-1
3.1 General..............................................................................................................3-1
3.2 Repair Note .......................................................................................................3-1
3.3 Recommended Test Equipment List.................................................................3-1
3.4 Printed Circuit Board Numbering Convention .................................................3-2
3.5 Standard Factory Settings and Jumper Configuration ......................................3-2
3.6 VT-3H040 Amplifier Alignment ......................................................................3-2
3.6.1 General..............................................................................................................3-2
3.6.2 VT-3H040 Amplifier Adjustment.....................................................................3-3
4 ILLUSTRATIONS AND SCHEMATIC DIAGRAMS ...............................................4-1
4.1 VT-3H040 Output Lowpass Filter Component Layout....................................4-1
4.2 VT-3H040 Output Lowpass Filter Schematic Diagram ...................................4-1
4.3 VT-3H040 Amplifier Component Layout ........................................................4-2
4.4 VT-3H040 Amplifier Schematic Diagram........................................................4-3
5 PARTS LISTS ..............................................................................................................5-1
5.1 VT-3H040 Amplifier Electrical Parts List........................................................5-1
5.2 VT-3H040 Lowpass Filter Electrical Parts List ...............................................5-4
5.3 VT-3H040 Amplifier Mechanical Parts List ....................................................5-4
6 REVISION HISTORY..................................................................................................6-1
DANIELS
ELECTRONICS LTD.
TM
VT-3H040 VHF Amplifier Instruction Manual IM20-VT3040AMP 1-1
1 GENERAL
1.1 Introduction
The VT-3H040 Amplifier provides the final stage of RF amplification and filtering for the
VT-3H040 and VT-3H040 Transmitters. The amplifier operates over one of two distinct
frequency ranges; either 29 to 38 MHz or 38 to 50 MHz, depending on which of the two lowpass
output filters is installed. The output power is set to 3.0 Watts by means of an externally
accessed control. The VT-3H040 Amplifier is housed in a machined aluminum case that ensures
optimum RF shielding, provides a good ground, and also acts as a heatsink.
Additionally, the VT-3H040 Amplifier is equipped with output power and VSWR sensing lines
which 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 condition is present.
Output filtering for the VT-3H040 Amplifier is provided by the Output Lowpass Filter Board.
The Output Lowpass Filter Board is mounted in a separate compartment of the amplifier case in
order to provided maximum attenuation of harmonic and other spurious signals.
Refer to Section 4.4 "VT-3H040 Amplifier Schematic Diagram” for the amplifier and Section
4.2 for the Output Lowpass schematic diagram.
1.2 Performance Specification
Type: MT-3 series VHF Amplifier module.
Compatibility: MT-3 series Transmitter Main Board, OS-3H040 Synth.
Frequency Range: 29.0 MHz to 38.5 MHz or 37.5 MHz to 50.0 MHz.
RF Power Output: 3.0 Watts Fixed (± 1.5 dB with temperature and supply
voltage).
RF power Input: nominal level adjustable from +4 dBm to +10 dBm,
held within +/- 2 dB of nominal.
Output Impedance and VSWR: 50 Ω, Type N connector; 3:1 max. VSWR.
Input /Output Isolation: > 60 dB
Duty Cycle: 100%: Continuous operation from -30˚ C to +60˚C
(optional -40°C to +60°C)
DANIELS
ELECTRONICS LTD.
TM
1-2 IM20-VT3040AMP VT-3H040 VHF Amplifier Instruction Manual
Harmonic Emissions: Greater than 80 dB below the carrier.
Spurious Emissions: Greater than 90 dB below the carrier.
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 to +60°C temp test.
Operating Humidity: 95% RH (non-condensing) at +25˚ C.
Operating Voltage: +13.8Vdc Nominal (range +11 to +16Vdc),
+9.5Vdc Regulated.
Amplifier Transmit Current: 0.7 Amp typical; 1.1 Amp maximum
Amplifier Standby Current: less than 0.5 mA.
Amplifier Enable: Active to ground.
Amplifier Enable Response: typically overdamped, rising to within 90% of full power
within 5 msec; maximum (underdamped) overshoot of
30%.
DANIELS
ELECTRONICS LTD.
TM
VT-3H040 VHF Amplifier Instruction Manual IM20-VT3040AMP 6-1
6 REVISION HISTORY
Issue Date Description
ENHANCED FM
SYNTHESIZER
INSTRUCTION MANUAL
OS(R/T)-3H 29-470 MHZ
Covers Models:
OSR-3H061 OST-3H035
OSR-3H141 OST-3H045
OSR-3H162 OST-3H141
OSR-3H440 OST-3H162
OST-3H440
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.
Document Number:
Revision:
Revision Date:
IM10-OS3AH
5-0-1
Aug 2003
Daniels Electronics Ltd.
Victoria, BC
PRINTED IN CANADA
Enhanced FM Synthesizer Instruction Manual
IM10-OS3AH
ii
This 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 CONTROL
NOTE
Enhanced FM Synthesizer Instruction Manual
IM10-OS3AH
iii
Contents
Manual Section Locator .........................................................1
Enhanced Synthesizer OS(R/T)-3H 29-71.4 MHz .................3
General Information ...................................................................................5
Alignment ................................................................................................. 10
Schematics and Illustrations .................................................................... 15
Parts List .................................................................................................. 21
Enhanced Synthesizer OS(R/T)-3H 128-174 MHz .............. 27
General Information ................................................................................. 29
Alignment ................................................................................................. 34
Schematics and Illustrations .................................................................... 39
Parts List .................................................................................................. 45
Enhanced Synthesizer OS(R/T)-3H 406-470 MHz .............. 51
General Information ................................................................................. 53
Alignment ................................................................................................. 58
Schematics and Illustrations .................................................................... 63
Parts List .................................................................................................. 69
Revision History ................................................................... 75
Enhanced FM Synthesizer Instruction Manual
IM10-OS3AH
Manual Section Locator 1
To help determine the correct section for the synthesizer in question, refer to this chart. Note that
the operating frequency of the synthesizers in receivers is different from the receive frequency of the
radio itself. This is the IF Offset correction factor, and is described in each section.
MANUAL SECTION LOCATOR
Transmitters Receivers
Radio
Frequency
Transmitter
Model &
Frequency
Range
Enhanced
Synthesizer
Model &
Synthesizer
Frequency
Location
in
Manual
Receiver
Model &
Frequency
Range
Enhanced
Synthesizer
Model &
Synthesizer
Frequency
Location
in
Manual
VHF Low Band
29 - 50 MHz
VT-3H035
29-38MHz
OST-3H035
29-38MHz
See Page 3
Enhanced FM
Synthesizer
OS(R/T)-3H
29-71.4 Mhz
VR-3H035
29-38MHz OSR-3H061
50.4-71.4MHz
See Page 3
Enhanced FM
Synthesizer
OS(R/T)-3H
29-71.4 Mhz
VT-3H045
38-50MHz
OST-3H045
38-50MHz
VR-3H045
38-50MHz
VHF
128-174 MHz
VT-3/140
128-150MHz
OST-3H141
128-152.6MHz
See Page 27
Enhanced FM
Synthesizer
OS(R/T)-3H
128-174 Mhz
VR-3H140
128-150MHz
OSR-3H162
150-174MHz
See Page 27
Enhanced FM
Synthesizer
OS(R/T)-3H
128-174 Mhz
VT-3/160
150-174MHz
OST-3H162
150-174MHz
VR-3H160
150-174MHz
OSR-3H141
128-152.6MHz
UHF
406-512 MHz
UT-3/420
406-430MHz
OST-3H418
406-430MHz
See Page 51
Enhanced FM
Synthesizer
OS(R/T)-3H
406-470 Mhz
UR-3H420
406-430MHz
OSR-3H440
427.4-451.4MHz
See Page 51
Enhanced FM
Synthesizer
OS(R/T)-3H
406-470 Mhz
UT-3/460
450-470MHz
OST-3H460
450-470MHz
UR-3H460
450-470MHz
Enhanced FM Synthesizer Instruction Manual
IM10-OS3AH
29-71.4 MHz - Models Covered 3
Covers Models:
OST-3H035
OST-3H045
OSR-3H061
Transmitters Receivers
Radio
Frequency
Transmitter
Model &
Frequency
Range
Enhanced
Synthesizer
Model &
Synthesizer
Frequency
Location
in
Manual
Receiver
Model &
Frequency
Range
Enhanced
Synthesizer
Model &
Synthesizer
Frequency
Location
in
Manual
VHF Low Band
29 - 50 MHz
VT-3H035
29-38MHz
OST-3H035
29-38MHz Enhanced FM
Synthesizer
OS(R/T)-3H
29-71.4 Mhz
VR-3H035
29-38MHz OSR-3H061
50.4-71.4MHz
Enhanced FM
Synthesizer
OS(R/T)-3H
29-71.4 Mhz
VT-3H045
38-50MHz
OST-3H045
38-50MHz
VR-3H045
38-50MHz
VHF
128-174 MHz
VT-3/140
128-150MHz
OST-3H141
128-152.6MHz
See Page 27
Enhanced FM
Synthesizer
OS(R/T)-3H
128-174 Mhz
VR-3H140
128-150MHz
OSR-3H162
150-174MHz
See Page 27
Enhanced FM
Synthesizer
OS(R/T)-3H
128-174 Mhz
VT-3/160
150-174MHz
OST-3H162
150-174MHz
VR-3H160
150-174MHz
OSR-3H141
128-152.6MHz
UHF
406-512 MHz
UT-3/420
406-430MHz
OST-3H418
406-430MHz
See Page 51
Enhanced FM
Synthesizer
OS(R/T)-3H
406-470 Mhz
UR-3H420
406-430MHz
OSR-3H440
427.4-451.4MHz
See Page 51
Enhanced FM
Synthesizer
OS(R/T)-3H
406-470 Mhz
UT-3/460
450-470MHz
OST-3H460
450-470MHz
UR-3H460
450-470MHz
ENHANCED SYNTHESIZER OS(R/T)-3H 29-71.4 MHZ
Enhanced FM Synthesizer Instruction Manual
IM10-OS3AH
29-71.4 MHz - General Information 5
General Information
Introduction
The OS(R/T)-3H Synthesizer is a compact, fully
shielded and environmentally rugged frequency
synthesis module that is the nucleus of every
MT-3 synthesized Receiver and Transmitter
radio module. The OS(R/T)-3H generates a high
stability, low distortion radio frequency signal in
one of several frequency bands. The OS(R/T)-
3H utilizes an internal temperature compensated
9.6 or 10.0 MHz reference to produce a signal
stable to ±1 ppm within the temperature range of
-40°C to +60°C. Alternately, the OS(R/T)-3H can
be disciplined by an external 9.6 MHz or 10 MHz
reference of higher stability. All synthesizer
modules are designed to be easily removed
for programming, calibration and/or repair. The
synthesizer circuitry is distributed between two
printed circuit boards (PCBs) which are isolated
yet interconnected via photo-logic optical
transceivers that effectively eliminate residual
electrical noise between digital and analog
circuitry. Further shielding of the synthesizer’s
RF fi lter circuitry is provided by an internal
shielded enclosure.
OS(R/T)-3H Enhanced Synthesizer
Family Models
The OS(R/T)-3H Synthesizer Module is utilized
in both the MT-3 Receiver and Transmitter
product lines. In MT-3 Transmitters, the OS(R/
T)-3H synthesizer provides a modulated, low-
level RF signal to the Power Amplifi er module.
In MT-3 Receivers, the OS(R/T)-3H synthesizer
provides a low noise local oscillator (LO) signal
that either directly drives the mixer circuitry or
fi rst drives a buffer amplifi er which precedes
the mixer circuitry (if a higher LO drive signal
is required for enhanced intermodulation
capability).
Note: This section of the manual provides
service and operating information for
just the synthesizer modules listed
below. It is important to establish the
correct synthesizer model number,
as documentation is model-specifi c.
The model number can be found on
the synthesizer label, located on the
synthesizer module top cover.
This section of manual covers the following
Synthesizers:
OST-3H035 29-38 MHz RF output
installed in FM transmitter
OST-3H045 38-50 MHz RF output
installed in FM transmitter
OSR-3H061 50.4-71.4 MHz RF output
installed in FM receiver
All OS(R/T)-3H Enhanced Synthesizer Modules,
regardless of the frequency band, use the same
digital PCB and mechanical construction. There
are, however, signifi cant differences between
the various models when it comes to the
analog PCB. Each model’s specifi c sub-band
of operation within a given frequency band is
determined through SELECT components on the
corresponding analog board.
Enhanced FM Synthesizer Instruction Manual
IM10-OS3AH
29-71.4 MHz - General Information
6
Performance Specifi cations
Type: Narrow band FM, Single loop synthesizer module utilizing low noise VCO
and PLL technology. Compatible with Daniels MT-3 series Transmitter and
Receiver modules.
Frequency Range (Tuning range with no adjustment is shown in [ ] brackets.):
29 MHz-38 MHz [±0.5 MHz] (OST-3H035)
38 MHz -50 MHz [±1.0 MHz] (OST-3H045)
50.4 MHz-71.4 MHz [±1.0 MHz] (OSR-3H061)
Output Power: +5 dBm ±2 dBm into 50Ω
Harmonics: <-30 dBc
Spurious: <-90 dBc
Hum and Noise: -55 dB
Modulation Sensitivity: 3.0 kHz peak deviation (400 mVrms input)
External Reference Input: External reference input signal via SMB connector J1
Input level 0 dBm ±3 dB
Input impedance 50
Input frequency 10.0 MHz or 9.6 MHz (selectable through
digital board jumper JU1)
Power Requirements: Normal Confi guration:
+9.5 Vdc @ 160 mA
Low Current Standby Mode (TCXO enabled):
+9.5 Vdc @ 14 mA
Printed Circuit Board Numbering Convention
To expedite troubleshooting and maintenance procedures, 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
identifi 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)
Enhanced FM Synthesizer Instruction Manual
IM10-OS3AH
29-71.4 MHz - Parts Lists 21
Parts List
Analog Board Electrical Parts List
Ref
Desig Description Part Number
Enhanced FM Synthesizer Instruction Manual
IM10-OS3AH
Revision History 75
REVISION HISTORY
Revision Date ECO Description
PAGING MODULATOR
INSTRUCTION
MANUAL
CI-PM-3
Covers Models:
CI-PM-3-00
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.
Document Number:
Revision:
Revision Date:
IM55-CIPM3
5-0-0
Aug 2003
Daniels Electronics Ltd.
Victoria, BC
PRINTED IN CANADA
Paging Modulator Instruction Manual
IM55-CIPM3
ii
This 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 CONTROL
NOTE
Paging Modulator Instruction Manual
IM55-CIPM3
iii
Contents
General Information ...............................................................1
Introduction ................................................................................................1
Performance Specifi cations .......................................................................2
Theory of Operation ...............................................................5
Paging Signal Path ....................................................................................5
OCXO/PLL .................................................................................................8
Alignment ..............................................................................11
Repair Notes ............................................................................................ 11
General .................................................................................................... 12
Setup........................................................................................................ 13
Frequency Adjustment (Digital Paging).................................................... 13
Reference Adjustment (Analog Paging)................................................... 14
Test Data Symmetry Adjustment.............................................................. 14
PLL Setup ................................................................................................ 16
Simulcast Delay Setup............................................................................. 18
Connector Pin Functions and Jumper Settings.................... 23
Data / Control Port (Connector J1) Pin Functions.................................... 23
Motherboard Interface (Connector P1) Pin Functions ............................. 24
CI-PM-3 Data Delay Jumper Settings...................................................... 26
CI-PM-3 Circuit Board Jumpers ............................................................... 27
TS-64 MOD1 Jumper Settings ................................................................ 28
4-Level Modulation Bit Pattern................................................................. 28
Receiver IF / Audio PCB Jumper Settings ............................................... 29
Transmitter Audio Processor V2.3 Jumper Settings ................................ 29
Transmitter Synthesizer Jumper Settings ................................................ 29
CI-PM-3 Test Points ................................................................................. 30
Illustrations and Schematics ................................................ 31
CI-PM-3 Front Panel Controls................................................................. 32
Simulcast Paging ..................................................................................... 33
CI-PM-3 Component Layout - Top ........................................................... 34
CI-PM-3 Component Layout - Bottom...................................................... 35
CI-PM-3 Schematic Diagram - Page 1..................................................... 36
CI-PM-3 Schematic Diagram - Page 2..................................................... 37
Parts Lists ............................................................................ 39
Electrical Parts List .................................................................................. 39
Mechanical Parts List............................................................................... 44
RevisionHistory .................................................................... 45
Paging Modulator Instruction Manual
IM55-CIPM3
1
Introduction
The CI-PM-3 Paging Modulator module is an
optional plug-in component of the MT-3 Radio
Repeater System. This module provides digital
and/or analog paging capability for Daniels MT-3
transmitters in all supported frequency bands.
The CI-PM-3 is designed for low power
consumption, typically drawing less than 250 mA
in steady state. In its standard confi guration, the
CI-PM-3 uses an on-board frequency reference
source consisting of a 10 MHz OCXO with a
standard stability of 0.03 PPM. For high stability
applications (such as Simulcast), the CI-PM-3
Paging Modulator may be confi gured to use
an external high stability reference source (i.e.
rubidium, GPS or WWV) with a standard stability
greater than or equal to 0.002 PPM, to discipline
the on-board phase-locked loop OCXO
oscillator. To ensure that paging signals are the
same relative to each transmitter, the CI-PM-3
also incorporates a limited delay compensation
for the different link propagation paths between
transmitters.
The CI-PM-3 Paging Modulator supports both
analog and digital paging formats, and can
transmit POCSAG and other 2-level modulation
schemes at data transfer rates of 512, 1200, and
2400 Baud. It can also be confi gured for use as
a data repeater, whereby 2-level paging data is
recovered, re-shaped and then re-transmitted to
an additional repeater/paging transmitter.
The CI-PM-3 supports 4-level modulation
formats at data transfer rates up to 1600 BPS.
Each of the four modulation deviation levels
can be independently set, making the CI-PM-3
suitable for use in such pager signaling schemes
as Motorola’s FLEX™ Paging Protocol.
Setup conditions are established via front panel
switch settings, while internal jumper settings
and setup adjustments are easily accessible
using the EC-96, 96 Pin Extender Card.
The CI-PM-3 Paging Modulator includes the
following standard features:
• low power analog and CMOS control
circuitry.
• extended operating temperature range;
• jumper selectable Repeater/paging
transmitter confi guration;
• on-board +/-0.03 PPM 10 MHz OCXO;
• front panel selection of PLL OCXO using
external high stability frequency reference;
• jumper and line selectable analog/digital
paging confi guration;
• connection for optional CTCSS encoder/
decoder;
• balanced 600 Ω/single-ended microphone
input;
• selectable digital delay for Simulcast
operation
GENERAL
INFORMATION
Paging Modulator Instruction Manual
IM55-CIPM3
General Information
2
Performance Specifi cations
Model Number: CI-PM-3
Type: MT-3 Series Paging Modulator
Compatibility: MT-3 Series Radio Systems
Modulation: 16K0F3E (FM Analog)
14K7F1D (FM Data Transmission)
Audio Input: Balanced 600 Ω(tone or voice)
Digital Input: Bipolar: RS-232 compatible
Reference Input: 10 MHz, 0.5 to 2.5 V rms, 50 Ω Front Panel SMA
Reference Output: 10 MHz (Modulated), 2.5 V rms, 50 Ω Front Panel SMA
Frequency Stability: Standard: ±0.03ppm from -40°C to +60°C
Optional: External High Stability ±0.002ppm
from -40°C to +60°C (requires
WWV or GPS reference source).
Duty Cycle: Continuous, 100% from -40°C to +60°C
Audio Response: 0 Hz to 3.4 kHz
Maximum Deviation: +/- 50 PPM
Analog / Digital PTT Activation: Front panel connector and rear motherboard connection
Current Consumption: +13.8 VDC supply: 600 mA power
200 mA steady state
+9.5 VDC supply: 200mA (all options enabled)
80mA (all options disabled)
70mA (LED indicators off).
Operating Temperature Range: -40°C to +60°C
Paging Formats: 4-Level Multiple Transmitter paging ( Flex )
2-Level Multiple Transmitter paging (POCSAG)
Simulcast Operation: Supported with the addition of WWV/GPS receiver.
IC Type Approval: Approved for use with MT-3 VHF 138-174 MHz, UHF 450-470 MHz,
UHF 928-935 MHz,
Additional model/frequency band approvals TBA
FCC Type Acceptance: Approved for use with MT-3 VHF 138-174 MHz, UHF 450-470 MHz,
UHF 928-935 MHz,
Additional model/frequency band approvals TBA
Paging Modulator Instruction Manual
IM55-CIPM3
General Information 3
CTCSS Decoder/Encoder (Option)
Manufacturer: Communications Specialists Inc.
Model Number: TS-64
Number of Tones: 64
Frequency Range of Tones: 33.0 to 254.1 Hz
Signal to Noise: Better than 4 dB SINAD
Decode Time: 150 ms nominal
Fade Time: 350 ms nominal
Squelch Tail Elimination:: 160 ms reverse phase burst
Current Consumption: 9 mA
Physical Specifi cations
Physical Dimensions: Width: Height: Depth:
3.5 cm (1.38”) 12.8 cm (5.05”) 19 cm (7.5”)
Module Weight: 0.4 kg (1 lb.)
Corrosion Prevention: Anodized aluminum construction with stainless steel hardware. Selectively
applied Conformal coated glass epoxy 4 layer printed circuit boards. Gold
plated module connectors.
Module Design: Compact Eurostandard modular design. Plug-in module mates with Daniels
standard 19” MT3 repeater subrack. Interchangeable for test and repair.
External Connections: REF Input and Output SMA connectors located on the module’s front panel.
Motherboard Connections (Audio, Modulation, Power, and Control) are made
through a 96 pin, gold plated type C connector on the rear of the module.
User connections (Audio, Modulation, and Control) are made through a front
panel DB-15 connector as well as through the 96 pin connector on the rear
of the module.
Paging Modulator Instruction Manual
IM55-CIPM3
5
THEORY
OF OPERATION
Paging Modulator Instruction Manual
IM55-CIPM3
11
ALIGNMENT
Repair Notes
Removal and replacement of surface mount
components should be performed only in
specifi cally designed surface mount rework
and repair stations complete with electrostatic
discharge (ESD) protection.
To help prevent damage to the circuit board
pads when removing Surface Mount Solder
Jumpers, it is recommended that solder braid be
used in place of manual vacuum de-soldering
tools.
Paging Modulator Instruction Manual
IM55-CIPM3
23
CONNECTOR PIN FUNCTIONS
AND JUMPER SETTINGS
Paging Modulator Instruction Manual
IM55-CIPM3
31
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 identifi 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
Paging Modulator Instruction Manual
IM55-CIPM3
Illustrations and Schematics
32
SETUP
DEV
MODE
FREQ
SET
MOD
LED
PWR
DATA / CTRL
PORT
SET
REF
PULL DOWN
TO REMOVE
NORM
EXT
2 LEVEL
4 LEVEL
INT
ON
CI-PM-3
PAGING
MODULATOR
REF IN
REF OUT
DATA
AD
MODE
DATA
DATE: 25 JUNE 2003
TITLE: PAGING CARD FRONT PANEL
DRAWN BY: EVA DANIELS
REV DATE: 3 JULY 2003
DWG No: B0283
DANIELS
ELECTRONICS LTD.
TM A
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18
28
9
19
29
10
20
30
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24
5
15
25
6
16
26
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17
27
8
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29
10
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SW1-4 MODE &
SETUP SWITCHES
J3
HIGH STABILITY
10 MHZ EXTERNAL
REFERENCE INPUT
J2
OCXO / PHASE
LOCKED OUTPUT
DATA INDICATORS
J1
FRONT PANEL
DATA / CONTROL
PORT
DATA "1"
DATA "0"
CONTINUOUS
BIT STREAM
SW4 DETAIL
SET
DEV
A
CI-PM-3 Front Panel Controls
Paging Modulator Instruction Manual
IM55-CIPM3
Illustrations and Schematics 33
Simulcast Paging
DATE: 07 July 2003
TITLE: Simulcast Paging
DRAWN BY: Bryan Harper
REV DATE: -
DWG No: B0284
DANIELS
ELECTRONICS LTD.
TM
1
11
21
2
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3
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24
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15
25
6
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A
LINK B
LINK A
PTT
Digital Data
A / D Select
Balanced Audio
Balanced Audio
REF In
Paging
Terminal
ZETRON
Model
32/64/640
BASE TX
Daniels
MT-3
UHF TX
HIGH
STABILITY
REF
(±0.002 ppm)
2
CI-PM-3
Paging
Modulator
1
CTCSS
Module
Discr O/P
COR
Balanced Audio
Balanced Audio
REF In
HIGH
STABILITY
REF
(±0.002 ppm)
2
LINK RX
#1
Daniels
MT-3
UHF RX
CI-PM-3
Paging
Modulator
1
CTCSS
Module
PAGING
TX
#1
Daniels
MT-3
VHF/UHF
TX
Discr O/P
COR
Balanced Audio
Balanced Audio
REF In
HIGH
STABILITY
REF
(±0.002 ppm)
2
CI-PM-3
Paging
Modulator
1
CTCSS
Module
LINK RX
#2
Daniels
MT-3
UHF RX
PAGING
TX
#2
Daniels
MT-3
VHF/UHF
TX
Notes:
1. CTCSS selects Analog / Digital Paging Mode.
2. High stability oscillators are referenced to a
common GPS, WWV or other signal.
Paging Modulator Instruction Manual
IM55-CIPM3
39
Electrical Parts List
Ref
Desig Description Part Number
PARTS LISTS
Paging Modulator Instruction Manual
IM55-CIPM3
45
Revision Date ECO Description
REVISION
HISTORY