Codan Radio Communications VT-3A130-S-FSH Transmitter User Manual MT 3 AM Transmitter Main Board Instruction Manual

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Document Description	MT 3 AM Transmitter Main Board Instruction Manual
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Document Type	User Manual
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Date Submitted	2000-04-10 00:00:00
Date Available	2000-05-09 00:00:00
Creation Date	2000-04-06 10:08:58
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Document Lastmod	2000-04-06 11:03:07
Document Title	MT 3 AM Transmitter Main Board Instruction Manual

DANIELS
TM
ELECTRONICS LTD.
MT-3 RADIO SYSTEMS
MT-3 AM TRANSMITTER
MAIN BOARD
INSTRUCTION MANUAL
Covers:
A22-VAP130 AM Audio Processor Version 04
A21-TX3-00 TXMAIN/FPB Common Asembly Version 1.7
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: 3
Issue Date:
Printing Date:
Part No.:
Previous Issue: 2
December 98
Previous Issue Date: March 98
N/A
IM22-MT3AMTXMN
Daniels Electronics Ltd.
Victoria, BC
PRINTED IN CANADA
Reviewed By:
Quality Assurance:
Larry Freeman
Name
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
DE ELECTRONICS
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MT-3 AM Transmitter Main Board Instruction Manual
TABLE OF CONTENTS
Page
GENERAL...................................................................................... 1-1
1.1
Introduction........................................................................... 1-1
1.2
Performance Specifications ......................................................... 1-1
1.2.1
General ....................................................................... 1-1
1.2.2
Audio Specifications........................................................ 1-2
THEORY OF OPERATION .................................................................. 2-1
2.1
MT-3 AM Transmitter Main Board ................................................ 2-1
2.1.1
General ....................................................................... 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
Optional Relay...................................................... 2-2
2.1.2.5
PTT Output ......................................................... 2-3
2.1.2.6
PTT Voltage Switching............................................ 2-3
2.1.2.7
Transmitter Standby Modes....................................... 2-3
2.1.3
Audio Circuits ............................................................... 2-4
2.1.3.1
Microphone Audio ................................................. 2-5
2.1.3.2
Received Audio..................................................... 2-5
2.1.4
Channel Selection ........................................................... 2-5
2.1.4.1
Synthesized Transmitter........................................... 2-5
2.1.4.2
Crystal Controlled Transmitter ................................... 2-5
2.1.5
Amplifier Circuits ........................................................... 2-6
2.2
MT-3 Front Panel Board ............................................................ 2-6
2.3
MT-3 AM Audio Processor......................................................... 2-6
2.3.1
General ....................................................................... 2-6
2.3.2
Power Requirements........................................................ 2-6
2.3.3
Audio Circuitry.............................................................. 2-7
2.3.4
PTT Time-Out-Timer ....................................................... 2-8
TRANSMITTER ALIGNMENT............................................................. 3-1
3.1
General ................................................................................ 3-1
3.2
Repair Note ........................................................................... 3-1
3.3
Printed Circuitboard Numbering Convention..................................... 3-1
3.4
Recommended Test Equipment List ............................................... 3-1
3.5
Standard Factory Settings and Jumper Configuration ........................... 3-2
3.5.1
MT-3 AM Transmitter Board Factory Configuration ................... 3-2
3.5.2
MT-3 AM Audio Processor Factory Configuration..................... 3-3
3.6
MT-3 AM Transmitter Board Alignment .......................................... 3-3
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MT-3 AM Transmitter Main Board Instruction Manual
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3.6.1
General.......................................................................
3.6.2
MT-3 AM Transmitter Board Test Points................................
3.7
Module Installation and Removal..................................................
3.8
MT-3 AM Audio Processor Alignment ...........................................
3.8.1
General.......................................................................
3.8.2
MT-3 AM Audio Processor Adjustment ................................
3-3
3-4
3-4
3-5
3-5
3-5
TRANSMITTER INTERCONNECT PIN DEFINITIONS .............................. 4-1
ILLUSTRATIONS AND SCHEMATIC DIAGRAMS ...................................
5.1
MT-3 AM Transmitter Block Diagram ............................................
5.2
MT-3 AM Transmitter Board Electrical Assembly...............................
5.2.1
MT-3 AM Transmitter Main Board Component Layout (Top)........
5.2.2
MT-3 AM Transmitter Main Board Component Layout (Bottom) ...
5.2.3
MT-3 AM Transmitter Main Board Schematic Diagram ...............
5.3
MT-3 Front Panel Board............................................................
5.3.1
MT-3 Front Panel Board Component Layout ...........................
5.3.2
MT-3 Front Panel Board Schematic......................................
5.4
MT-3 AM Audio Processor Electrical Assembly ................................
5.4.1
MT-3 AM Audio Processor Component Layout........................
5.4.2
MT-3 AM Audio Processor Schematic Diagram........................
5-1
5-1
5-3
5-3
5-4
5-5
5-6
5-6
5-7
5-8
5-8
5-9
PARTS LISTS .................................................................................
6.1
Transmitter Main Board Parts List.................................................
6.1.1
Transmitter Main Board Electrical Parts List ............................
6.1.2
Transmitter Main Board Mechanical Parts List..........................
6.1.3
MT-3 Front Panel Board Electrical Parts List ...........................
6.2
MT-3 AM Audio Processor Parts List ............................................
6.2.1
MT-3 AM Audio Processor Electrical Parts List........................
6-1
6-1
6-1
6-3
6-4
6-4
6-4
REVISION HISTORY........................................................................ 7-1
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MT-3 AM Transmitter Main Board Instruction Manual
1
GENERAL
1.1
Introduction
The MT-3 AM Transmitter Main Board integrates the MT-3 Front Panel Board, MT-3 AM Audio
Processor, Synthesizer or Crystal Control module and Amplifier module together to make a
working MT-3 AM series transmitter (see section 5.1: MT-3 AM 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 Control 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 to the 48 pin type 'F' connector on the rear of the Transmitter Main Board and are routed to
the other modules. The front and rear back plates are attached to the Transmitter Main Board and
together with the extruded aluminum shell, as discussed in the assembly section of the Transmitter
Manual, form the transmitter enclosure.
1.2
1.2.1
Performance Specifications
General
Type:
MT-3 AM Series Transmitter
Compatibility:
VT-3A Series Amplifier, OCT-3 Crystal Oscillator, OST-3
Frequency Synthesizer.
Modulation:
6K00A3 (Amplitude Modulation)
Operating Temperature Range:
-30˚C to +60˚C, optional - 40˚C temperature test.
Operating Humidity:
95% RH (non-condensing) at +25°C.
Operating Voltage:
+13.8Vdc , +9.5 Vdc Regulated.
Front Panel Control:
One 3 position switch
• NORM (repeat mode)
• OFF
• KEY TX
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.).
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MT-3 AM Transmitter Main Board Instruction Manual
1-1
1.2.2
Audio Specifications
Audio Input:
-30 to 0 dBm into a 600Ω balanced load.
Audio Response:
Flat audio; +1/-3 dB: 300 Hz - 3 kHz
Audio Distortion:
Less than 3% -40˚C to +60˚C at 30% modulation
Less than 5% -40˚C to +60˚C at 90% modulation
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MT-3 AM Transmitter Main Board Instruction Manual
2
THEORY OF OPERATION
2.1
MT-3 AM Transmitter Main Board
2.1.1
General
Switch SW1 on the Front Panel Board is a DPDT switch which controls the operation of the
transmitter as discussed in the operations section of the Transmitter Manual. When SW1 is in the
'OFF' position the transmitter is turned off; however, +13.8 Vdc is still present on the Transmitter
Main Board as the +13.8 Vdc supply is not switched. When SW1 is in the 'KEYED' position,
+9.5 Vdc is supplied to the transmitter circuitry and the transmitter is continuously turned on.
When SW1 is in the 'NORM' position, +9.5 Vdc is supplied to the transmitter circuitry and the
transmitter can be keyed from several Push-To-Talk inputs.
Refer to section 5.2.3 Transmitter Main Board Schematic Diagram".
2.1.2
Transmitter Push-To-Talk
All three of the Push-To-Talk (PTT) inputs that key the transmitter are active low (< +2.0 Vdc).
One PTT input is on the front panel microphone connector. The other two PTT inputs: PTT WTO
(PTT With Time-Out-Timer) and PTT NTO (PTT No Time-Out-Timer), are on the backplane
connector of the transmitter board. If required, the microphone's PTT input can be configured to
activate the transmitter's Time-Out-Timer (TOT). An isolated PTT input can be made available by
installing an optional relay (RELAY1) and configuring jumpers J2 to J4 so that the relay controls
the PTT circuitry.
2 . 1 . 2 . 1 Microphone PTT
Jumper J1 on the MT-3 Front Panel Board configures the microphone's PTT input (MIC PTT) to
either bypass or activate the transmitter's TOT. Soldering jumper J1 in the 'x' position (default)
selects the MIC PTT NTO line which bypasses the TOT. Soldering J1 to the 'y' position selects
the MIC PTT WTO line which activates the transmitter's TOT. When SW1 is in the 'KEYED'
position the MIC PTT NTO line is automatically grounded. Refer to Section 5.3.1, "MT-3 Front
Panel Board Component Layout" for the location of jumper J1.
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MT-3 AM Transmitter Main Board Instruction Manual
2-1
2 . 1 . 2 . 2 PTT With Time-Out-Timer
Pins B10 and Z10 of the backplane connector are the PTT WTO input. When the PTT WTO
signal, which is normally high, falls below +2.0 Vdc, the transmitter is keyed. The transmitter is
disabled when the PTT WTO input rises above +2.3 Vdc or if the TOT's time-out period is
exceeded. If the time-out period is exceeded the PTT WTO input must go high (>+2.3 Vdc) and
then low again in order to rekey the transmitter.
The PTT WTO threshold of approximately +2 Vdc (0.3 Vdc hysteresis) is set by U1a, R1, R2,
R3, R4, R9, and R10 while diodes D1 and D2 provide overvoltage protection for U1a. The PTT
WTO signal output from U1a is 'AND'ed with the MIC PTT WTO by U2a. When either the PTT
WTO or the MIC PTT WTO is activated the output of U2a goes low which triggers the
transmitter's TOT located on the MT-3 Audio Processor. The TOT's output is 'AND'ed with the
MIC PTT NTO signal (U2c) and the PTT NTO signal (U2d). When any one of the preceding
three signals (TOT's output, MIC PTT NTO, PTT NTO) go low the transmitter is activated by
transistors Q1 to Q7 which switch power to the various modules.
2 . 1 . 2 . 3 PTT No Time-Out-Timer
Pins B14 and Z14 of the backplane connector are the PTT NTO input. When the PTT NTO signal,
which is normally high, falls below +2.0 Vdc, the transmitter is keyed. As long as the PTT NTO
signal remains below +2.0 Vdc the transmitter will remain keyed. The transmitter is disabled when
the PTT NTO signal rises above +2.3 Vdc.
The PTT NTO threshold of approximately +2 Vdc (0.3 Vdc hysteresis) is set by U1b, R5, R6,
R7, R8, R9, and R10 while diodes D3 and D4 provide overvoltage protection for U1b. The PTT
NTO signal is 'AND'ed with the output of U2c (MIC PTT NTO signal 'AND'ed with the TOT
output) by U2d. When the output of U2d goes low the transmitter is activated by transistors Q1 to
Q7 which switch power to the various modules.
2 . 1 . 2 . 4 Optional Relay
The transmitter's PTT circuitry can be completely isolated by installing RELAY1. Jumpers J2 to
J4 configure the relay to provide an isolated PTT input for either the PTT WTO line or PTT NTO
line. The isolated PTT input is enabled by energizing the relay. The transmitter board will accept
any of the Aromat TF2E line relays. These relays are DPDT, single side stable, and have coil
voltages ranging from +3 Vdc to +48 Vdc. Only one set of relay contacts are used to activate the
PTT circuitry, the other set of contacts are brought out to the backplane connector.
To configure the isolated input for PTT WTO operation jumpers J2, J4 must be in the 'y'position,
J3 must be in the 'x' position. In this mode, pins B10 and Z10 no longer function as the PTT
WTO input; however, pins B14 and Z14 continue to function as the normal PTT NTO input.
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MT-3 AM Transmitter Main Board Instruction Manual
To configure the isolated input for PTT NTO operation jumpers J2, J4, must be in the 'x' position
J3 must be in the 'y' position. In this mode, pins B14 and Z14 no longer function as the PTT NTO
input; however, pins B10 and Z10 continue to function as the normal PTT WTO input.
2 . 1 . 2 . 5 PTT Output
Pin B24 on the backplane connector is an open drain output (Q9) which is pulled low anytime the
transmitter is keyed and the synthesizer is locked. A crystal controlled transmitter does not have a
locked condition so pin B24 is pulled low anytime the transmitter is keyed. Q9, an N-channel
MOSFET capable of sinking currents up to 2 Amps, is activated by Q8 which is activated by the
Qualified PTT signal (JS2-6) of the synthesizer or crystal control module. The Qualified PTT
signal also controls the LED ENA line for diode D1 on the front panel board and enable line for the
VT-3A Amplifier Module (JP1-1).
2 . 1 . 2 . 6 PTT Voltage Switching
The PTT voltage switching circuitry is comprised of transistors Q1 through Q7 and the associated
resistors. The base of Q1 is driven by the output of U2d which is the combined PTT signal from
all of the PTT inputs. When the transmitter is keyed, Q1 is turned off and subsequently transistors
Q3, Q4, and Q6 are turned on. Transistors Q3, Q4, and Q6 provide three different functions:
•Q3 provides the active low signal for the synthesizer or crystal module PTT input;
•Q4 turns on Q5 which turns on the +9.5 Vdc Switched supply;
•Q6 turns on Q7 which turns on the +9.5 Vdc PTT Switched supply.
The '+9.5 Vdc Switched' supply (Q5) can also be activated by installing jumper J6 or by externally
grounding the TX Standby Line (pins B12 and Z12). The '+9.5 Vdc PTT Switched' supply and
the '+9.5 Vdc Switched' supply both provide +9.5 Vdc but depending on how jumpers J6, J7 and
J18 are configured the transmitter's standby mode will change.
2 . 1 . 2 . 7 Transmitter Standby Modes
The VT-3A130 Transmitter has four different standby modes that trade-off standby current
consumption for start-up speed. The standby modes are determined by three jumpers: jumper J6
which always turns on the '+9.5 Vdc Switched' supply, jumper J7 which selects the power source
for the MT-3 AM Audio Processor and jumper J18 which selects the enable line for the OST3A128 Synthesizer or OCT-3 Crystal Control Module.
The actual current and start-up time may depend on the frequncy controlled source (crystal or
synthesizer) and amplifier module. The current and start-up times given below are representative
values intended only as a guideline.
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MT-3 AM Transmitter Main Board Instruction Manual
2-3
•MODE 1: Jumper J6 out
- the audio processor is switched by a PTT signal
- the synthesizer or crystal module is switched by a PTT signal
- standby current:
Synthesized - typically 13 mA
Crystal Controlled - typically 6 mA
- start-up time: Synthesized - typically 40 ms
Crystal Controlled - typically 40 ms
•MODE 2: Jumper J6 in, jumper J7 in the 'y' position, jumper J18 in the 'x' position
- the audio processor is switched by a PTT signal
- the synthesizer or crystal module is enabled all of the time
- standby current:
Synthesized - not used in this mode
Crystal Controlled - typically 6 mA
- start-up time: Synthesized - not used in this mode
Crystal Controlled - typically 40 ms
• MODE 3: Jumper J6 in, jumper J7 in the 'x' position, jumper J18 in the 'y' position
- the audio processor is enabled all of the time
- the synthesizer or crystal module is switched by a PTT signal
- standby current:
Synthesized - typically 19 mA
Crystal Controlled - typically 11 mA
- start-up time: Synthesized - typically 40 ms
Crystal Controlled - typically 8 ms
•MODE 4: Jumper J6 in, jumper J7 in the 'x' position, jumper J18 in the 'x' position
- the audio processor is enabled all of the time
- the synthesizer or crystal module is enabled all of the time
- standby current:
Synthesized - typically 163 mA
Crystal Controlled - typically 23 mA
- start-up time: Synthesized - typically 12 ms
Crystal Controlled - typically 8 ms
2.1.3
Audio Circuits
All of the audio signal conditioning (e.g. limiting, filtering) is performed by the MT-3 AM Audio
Processor. The transmitter board routes the audio lines from the backplane connector to the audio
processor. The audio lines routed to the audio processor are: a 600 ohm balanced input (pins B18
and Z18), and a MIC AUDIO from the MT-3 FRONT PANEL BOARD. It is here that the MIC
audio is processed in the same manner as the 600 ohm balanced audio.
The audio processor's balanced input pins are isolated from pins B18 and Z18 by a transformer
(T1). Two audio outputs from the MT-3 AM Audio Processor are routed to the VT-3A130
Amplifier.
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MT-3 AM Transmitter Main Board Instruction Manual
2 . 1 . 3 . 1 Microphone Audio
Normally the audio from a transmitter's microphone is transmitted by that transmitter; however, the
Transmitter Main Board can be configured by the MIC IN and MIC OUT lines so that the audio
from an external microphone modulates transmitter. The configuration of the MIC IN (pin Z4) and
MIC OUT (pin B4) lines on the MT-3 Transmitter Board are controlled by jumpers J16 and J17
respectively. Jumper J16 selects the audio source for the MT-3 AM Audio Processor's
microphone input. Jumper J17 is used to enable or disable the MIC OUT line. Normally the
transmitter's microphone is selected (J16 in the 'x' position) and the MIC OUT line is enabled (J17
is installed).
2 . 1 . 3 . 2 Received Audio
Pin B20 is the audio input from the transmitter's corresponding receiver. The default setting for
this line is to have it AC coupled (Jumper J9 is out) and directly connected to the front panel board
RX AUDIO line.
2.1.4
Channel Selection
2 . 1 . 4 . 1 Synthesized Transmitter
Eight backplane connections are used to communicate with the synthesizer unit. Pins D28, D30,
and D32 are used (in house) to program the synthesizer. Channel select lines (pins D20, D22,
D24, and D26) are used once the synthesizer is programmed to select one of 16 channels. If the
channel select lines are all low (channel 0) the channel for the synthesizer is read from switches
FSW1 (most significant), FSW2, FSW3, and FSW4 (least significant). Since the resulting
frequency is dependent on the transmitter model, refer to the section on frequency selection in the
Transmitter Manual or to the channel designation tables for that particular transmitter.
2 . 1 . 4 . 2 Crystal Controlled Transmitter
The crystal control module is a direct replacement for the synthesizer module and therefore uses the
same connections as the synthesizer to connects to the MT-3 AM Transmitter Main Board. The
channel select lines and switches FSW1 to FSW4 are not used by the crystal control module as the
transmitter's operating frequency is determined by the crystal control module's crystal frequency.
A frequency multiplication factor, described in the manual for this module, relates the crystal
frequency to the operating frequency .
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MT-3 AM Transmitter Main Board Instruction Manual
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2.1.5
Amplifier Circuits
The MT-3A series Amplifier has 5 connections that are cabled to the transmitter board: +13.8
Vdc, +9.5 Vdc, Enable, Mod and Gnd. The +13.8 Vdc supply (JP1-3) is always on while the
+9.5 Vdc supply (JP1-2) is always switched by a PTT signal. The enable line (JP1-1) is active
low and is controlled by the Qualified PTT signal from the synthesizer.
Jumpers J12, J13, J14, and J15 are not installed.
2.2
MT-3 Front Panel Board
The MT-3 Front Panel Board is a subsection of the MT-3 AM Transmitter Board which is used to
mount the front panel switch, diode, and microphone connector. The main purpose of the board is
to eliminate a wiring harness for the front panel components. Jumper J1, located on the rear of the
circuitboard, is used to select whether or not the MIC PTT line activates the transmitter's TOT:
•Jumper J1:
'x' position
'y' position
MIC PTT NTO no time-out-timer (factory setting)
MIC PTT WTO with time-out-timer
Refer to section 5.3.2 "MT-3 Front Panel Board Schematic Diagram".
2.3
2.3.1
MT-3 AM Audio Processor
General
The MT-3 AM Audio Processor is a versatile circuitboard that can provide several types of audio
processing. The module also has an on-board programmable push-to-talk (PTT) time-out-timer
(TOT) on an attached circuitboard. A continuous +9.5 Vdc supply and a continuous +13.8 Vdc
supply together with a switched +8.0 Vdc supply are required to power the module. Refer to
section 5.4.1 "MT-3 AM Audio Processor Component Layout" and to section 5.4.2 "MT-3 AM
Audio Processor Schematic Diagram" for component location and designation references.
2.3.2
Power Requirements
The audio processor can be configured for continuous audio standby or for switched audio standby
by the Transmitter Main Board. If fast audio risetime is desired, the transmitter should be operated
in standby mode 3 or 4 as specified in section 2.1.2.7. The current for the associated TOT is
approximately 4 mA when the transmitter is keyed.
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MT-3 AM Transmitter Main Board Instruction Manual
2.3.3
Audio Circuitry
The MT-3 AM Tx Audio Processor refer to section 5.4.2 "MT-3 AM Audio Processor Schematic
Diagram" has two audio inputs (Microphone input and Balanced input) which can be used to
modulate the transmitter. The input signals are combined by R2 and R17 at a compandor U1.
U1b controls the input level and makes gain inversely proportional to the input level (say a 20 dB
drop in input level will produced a 20 dB increase in gain). The output will remain fixed at a
constant level without clipping and distortion. (Automatic Level Control) The input signals are
adjusted by the pots R1, R16. The variable gain cell in U1a is used as a voltage-controlled
amplifier so that if the power supply (13.8Vdc) has changed the output level will change in order
to keep the modulation of the RF output signal at the same level. The gain control can be adjust by
the pot R4. (Automatic Modulation Control) The audio signal then amplifies and filters at U2.
The output signal is adjusted by the pot R9.
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2.3.4
PTT Time-Out-Timer
The PTT time-out-timer (TOT) is a relatively independent circuitry located on the Transmitter
Board. The TOT is powered from the continuous +9.5 Vdc supply (J34) and is programmable for
various time-out periods. The TOT input is normally high and in this state the timer is disabled.
When the input trigger level falls below +2.0 Vdc, the timer is activated, and the transmitter is
keyed. If the input trigger rises above +2.4 Vdc or if the time-out period is exceeded, the output
trigger will go high, disabling the transmitter. If the time-out period is exceeded, the TOT input
trigger must go high and then low again in order to rekey the transmitter.
The time-out duration is jumper selectable from 1 second to 8 hours. The table below shows the
time-out duration in minutes for the various jumper settings which are listed as enabled (E: jumper
shorted - in) or disabled (D: jumper left open - out). The standard factory setting of 5 minutes is
shown in bold type in the table below.
D = DISABLED (no solder jumper installed), E = ENABLED (solder jumper installed). Bold text
represents default settings.
TIME-OUT DURATION
(MINUTES)
JU32
JU31 JU29 JU28
JU26= E
JU26= D
JU26= E
JU27= D
JU27= E
JU27= E
0.01
0.01
0.01
0.02
0.03
0.01
0.04
0.06
0.02
0.08
0.12
0.05
0.15
0.23
0.10
0.31
0.47
0.19
0.62
0.94
0.38
1.25
1.88
0.75
2.5
3.75
1.5
5.0
7.5
3.0
10
15
6.0
20
30
12
40
60
24
80
120
48
160
240
96
320
480
192
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MT-3 AM Transmitter Main Board Instruction Manual
3
TRANSMITTER ALIGNMENT
3.1
General
Transmitter alignment is simplified by using an M-3 Subrack, SM-3 System Monitor, and RF
extender cable to provide transmitter power and signal interconnection. Alternatively, +9.5 Vdc
and +13.8 Vdc may be applied directly to a transmitter module through positive connection for the
+9.5 Vdc to pins B6 and Z6, for the +13.8 Vdc to pins B2 and Z2, and negative connection to pins
B30, Z30, B32, and Z32. Transmitter balanced audio (600 Ω) is available at pins B18 and Z18.
3.2
Repair Note
MT-3 Transmitter modules are mainly made up of surface mount devices which should not be
removed or replaced using an ordinary soldering iron. Removal and replacement of surface mount
components should be performed only with specifically designed surface mount rework and repair
stations complete with ElectroStatic Dissipative (ESD) protection.
3.3
Printed Circuitboard Numbering Convention
To ease troubleshooting and maintenance procedures, Daniels Electronics Limited has adopted a
printed circuitboard (PCB) numbering convention in which the last two digits of the circuitboard
number represent the circuitboard version. For example:
• PCB number 43-912010 indicates circuitboard version 1.0;
• PCB number 50002-02 indicates circuitboard version 2.0.
All PCB's manufactured by Daniels Electronics are identified by one of the above conventions.
When removing Surface Mount Solder Jumpers, it is recommended to use solder braid in place of
manual vacuum type desoldering tools when removing jumpers. This will help prevent damage to
the circuitboards.
3.4
Recommended Test Equipment List
Alignment of the complete transmitter requires the following test equipment or its equivalent. It is
assumed that any adjustment of the Transmitter Main Board will also involve the other modules.
Dual Power Supply:
Oscilloscope / Multimeter:
Current Meter:
Regulated +9.5 Vdc at 2 A.
Regulated +13.8 Vdc at 2 A - Topward TPS-4000
Fluke 97 Scopemeter
Fluke 75 Multimeter
DANIELS
DE ELECTRONICS
MT-3 AM Transmitter Main Board Instruction Manual
3-1
Radio communications test set :
VSWR 3:1 mismatch load:
Alignment Tool:
Marconi Instruments 2955R
JFW 50T-035-3.0:1
Johanson 4192
It is recommended that the radio communications test set be frequency locked to an external
reference (WWVH, GPS, Loran C) so that the high stability oscillator may be accurately set to
within its ±1 ppm frequency tolerance.
3.5
Standard Factory Settings and Jumper Configuration
Standard factory settings and the associated jumper configuration for each module of the
MT-3 AM series transmitter are given below.
3.5.1
MT-3 AM Transmitter Board Factory Configuration
The MT-3 AM Transmitter Main Board is factory configured as follows:
• Transmitter standby mode 3
• Optional relay not installed.
The corresponding jumper settings are:
•Jumper J2:
•Jumper J3:
•Jumper J4:
•Jumper J6:
•Jumper J7:
•Jumper J9:
•Jumper J12:
•Jumper J13:
•Jumper J14:
•Jumper J15:
•Jumper J16:
•Jumper J17:
•Jumper J18:
•Jumper J19:
•Jumper J20:
•Jumper J21:
•Jumper J22:
•Jumper J23:
•Jumper J24:
•Jumper J25:
•Jumper J26:
'x' position
not installed
'y' position
installed
'x' position
not installed
not installed
not installed
not installed
not installed
'x' position
installed
'y' position
'x' position
'x' position
not installed
'x' position
'x' position
not installed
'y' position
installed
Optional relay configuration
Optional relay configuration
Optional relay configuration
Transmitter standby mode select - Mode 3
Audio processor standby mode select
Receiver audio ac/dc input coupling
Not applicable
Not applicable
Not applicable
Not applicable
Microphone configuration
Microphone output line
Synthesizer or crystal module standby mode select
600Ω audio transformer bypass
600Ω audio transformer bypass
+8 Vdc audio processor supply bypass
600Ω audio transformer bypass
600Ω audio transformer bypass
Not applicable
AM Modulation mode
TOT configuration
DANIELS
DE ELECTRONICS
3-2
MT-3 AM Transmitter Main Board Instruction Manual
•Jumper J27:
•Jumper J28:
•Jumper J29:
•Jumper J31:
•Jumper J32:
•Jumper J33:
•Jumper J34:
•Jumper J35:
3.5.2
not installed
not installed
installed
installed
not installed
installed
installed
installed
TOT configuration
TOT configuration
TOT configuration
TOT configuration
TOT configuration
TOT input
TOT power supply
TOT output
MT-3 AM Audio Processor Factory Configuration
The MT-3 AM Tx Audio Processor is factory configured as follows:
•Microphone Input:
•Audio Balanced Input:
•Automatic Modulation Control
•Automatic Level Control
1kHz tone at -10 dBm gives 50% maximum modulations.
1 kHz tone at -8 dBm gives 90% maximum modulations.
enabled
enabled
The corresponding jumper settings are:
•Jumper JU1:
•Jumper JU2:
•Jumper JU3:
•Jumper JU4:
•Jumper JU5:
•Jumper JU6:
•Jumper JU7:
•Jumper JU8:
•Jumper JU9:
3.6
3.6.1
'y' position
not installed
'y' position
not installed
'y' position
'y' position
not installed
'y' position
installed
Automatic Modulation Control enabled
Modulation configuration
Automatic Level Control enabled
Time-out-time power supply (optional)
Voice application
Voice application
Modulation configuration
Automatic Level Control enabled
Power AMC and Microphone enabled
MT-3 AM Transmitter Board Alignment
General
Before proceeding with the transmitter alignment, check that the appropriate jumpers are installed.
The standard jumper configuration for the Transmitter Main Board, given in section 3.4.1, is
normally employed for transmitter alignment. In a standard configuration, the only alignment
required on the MT-3 AM Transmitter Main Board for a synthesized transmitter is to set the
frequency switches (FSW1, FSW2, FSW3, and FSW4) for the desired channel frequency. FSW1
is the most significant digit of the frequency switches. The switch settings for the desired channel
frequency can be found in the channel designation tables. If the transmitter is using a crystal
control module, the switch settings are irrelevant.
DANIELS
DE ELECTRONICS
MT-3 AM Transmitter Main Board Instruction Manual
3-3
3.6.2
MT-3 AM Transmitter Board Test Points
TP1:
TP2:
TP3:
TP4:
TP5:
TP6:
TP7:
TP8:
TP9:
TP10:
TP11:
TP12:
TP13:
TP14:
TP15:
TP16:
TP17:
TP18:
TP19:
TP20:
TP21:
TP22:
TP23:
TP24:
TP25:
TP26:
TP27:
TP28:
TP29:
TP31:
TP32:
TP33:
TP34:
3.7
not used
microphone audio
microphone PTT WTO; inactive +9.5 Vdc, active 0 Vdc
microphone PTT NTO; inactive +9.5 Vdc, active 0 Vdc
+9.5 Vdc from backplane connector
+9.5 Vdc from front panel board
+9.5 Vdc Switched
Qualified PTT; inactive +9.5 Vdc, active 0 Vdc: activated by synthesizer
synthesizer enable; selected by J18
synthesizer bootstrap line; +5 Vdc
synthesizer PTT input; inactive +9.5 Vdc, active 0 Vdc
audio processor TOT input; inactive +9.5 Vdc, active 0 Vdc
audio processor TOT output; inactive +9.5 Vdc, active 0 Vdc
audio processor audio output
not used
not used
not used
not used
audio processor continuous +9.5 Vdc
not used
audio processor supply +8 Vdc, selected by J7
not used
synthesizer receive data line; 0 Vdc
synthesizer transmit data line; +5 Vdc
Q1 collector; inactive 0 Vdc, active +9.5 Vdc
U2d output; inactive +9.5 Vdc, active 0 Vdc
U1a output (PTT WTO); inactive +9.5 Vdc, active 0 Vdc
U1b output (PTT NTO); inactive +9.5 Vdc, active 0 Vdc
Q6 collector / Q7 gate; inactive +9.5 Vdc, active 0 Vdc
+9.5 Vdc TOT SET
+9.5 Vdc TOT RESET
+9.5 Vdc BALANCED INPUT
+9.5 Vdc BALANCED INPUT
Module Installation and Removal
Installation of the Enhanced Synthesizer or Crystal Controlled Oscillator module is facilitated by
alignment pins on each corner of the module. When the four pins are aligned with their
corresponding hole in the Transmitter Main Board, push the module down, taking care to ensure
the connector pins on the bottom of the Synthesizer or Crystal Controlled Oscillator module are not
bent.
DANIELS
DE ELECTRONICS
3-4
MT-3 AM Transmitter Main Board Instruction Manual
To remove the Enhanced Synthesizer or Crystal Controlled Oscillator module, simply remove the
center screw from the module lid and pull the module out. The module should be pulled straight
out so that the four alignment pins do not bend or damage the circuitboard.
3.8
MT-3 AM Audio Processor Alignment
3.8.1
General
Verify the standard factory settings for the MT-3 AM Audio Processor as given in section 3.5.2
before beginning the standard modulation adjustment procedure. If the transmitter's channel
frequency changes, the audio processor should be realigned to optimize the transmitter's
performance. The schematic diagram for the audio processor is shown in section 5.4.2 and the
component layout is shown in section 5.4.1.
3.8.2
MT-3 AM Audio Processor Adjustment
**note: clockwise rotation of controls increase signal levels
1)
Before adjusting the audio board, confirm that the transmitter frequency is correct.
2)
Unscrew and slide out the case of the transmitter. Locate the Tx Audio Board.
3)
Connect the transmitter RF Output to a Radio communications test set.
4)
Connect the 600 ohm input to the incoming audio (pins B18, Z18). Set the audio
frequency to 1 kHz at the desired level of -8 dBm.
5)
Turn the transmitter on.
6)
Adjust the pot R16, in order to achieve about 0.700 Vrms at TP4.
7)
Adjust the pot R14, in order to achieve about 0.200 Vrms at TP8.
8)
Tune the Audio Adjust pot R1 on the Power Amplifier board to obtain 90%
modulation.
9)
Apply a 1 kHz, -20 dBm input signal and adjust the pot R16 in order to obtain 30%
modulation.
10) Apply a 1 kHz, -8 dBm input signal, the modulation should be 90%, observe that the
distortion of the transmitted signal is within 5.0%.
DANIELS
DE ELECTRONICS
MT-3 AM Transmitter Main Board Instruction Manual
3-5
11) Slowly increase the input audio signal level to 5 dBm and observe that the modulation
does not go over 100%. This step verifies the correct operation of the ALC .
12) Change 13.8Vdc power supply to 10V and then to 17V, the modulation of the output
RF signal should remain at the same level of 90% ±7% and distortion should be less
then 3%. If not, adjust the pot R4 on the Audio Processor Board to achieve this.
This step verifies the correct operation of the AMC.
13) Repeat steps 7 and 9 if required.
14
Supply a 1 kHz, -10 dBm signal to the microphone input. (Note the level restriction
of -25 dBm to 0 dBm.)
15) Adjust the Microphone Input Level Adjust pot (R1) to achieve 50% of RF signal
modulation. Observe that the distortion should be under 5%.
16) Turn off the transmitter. Remove the signal source and replace all the screws.
DANIELS
DE ELECTRONICS
3-6
MT-3 AM Transmitter Main Board Instruction Manual
4
TRANSMITTER INTERCONNECT PIN DEFINITIONS
The MT-3 AM series Transmitter employs a 48 pin Eurostandard connector for interfacing to all
transmitter power, audio, and control functions. The following are the MT-3 AM series
Transmitter backplane connections to the M-3 Motherboard.
Pin
Name
P i n Name
P i n Name
D2
D4
D6
D8
D10
D12
D14
D16
D18
D20
D22
D24
D26
D28
D30
D32
N/C
N/C
N/C
N/C
N/C
N/C
N/C
N/C
N/C
Channel Select 0 (LSB)
Channel Select 1
Channel Select 2
Channel Select 3 (MSB)
Synth Tx Data (Output)
Synth Rx Data (Input)
Synth Bootstrap (Input)
B2
+13.8 Vdc
B4
MIC Out
B6
+9.5 Vdc
B8
Relay Positive
B10 PTT WTO
B12 Tx Standby
B14 PTT NTO
B16 No Connect (MT-2 +9.5V)
B18 Balanced Input 2
B20 Squelched,De-emph Audio
B22 Subtone Input 1
B24 PTT Output
B26 Forward Power Sense
B28 Monitor Out
B30 Ground
B32 Ground
Z2
+13.8 Vdc
Z4
MIC In
Z6
+9.5 Vdc
Z8
Relay Negative
Z10 PTT WTO
Z12 Tx Standby
Z14 PTT NTO
Z16 No Connect (MT-2 +9.5V)
Z18 Balanced Input 1
Z20 Squelched, Flat Audio
Z22 Tx Audio Control
Z24 Subtone Input 2
Z26 Reverse Power Sense
Z28 Direct Mod Input
Z30 Ground
Z32 Ground
DANIELS
DE ELECTRONICS
MT-3 AM Transmitter Main Board Instruction Manual
4-1
This Page Intentionally Left Blank
DANIELS
DE ELECTRONICS
4-2
MT-3 AM Transmitter Main Board Instruction Manual
LSB
MSB
5.1
6 5 4
ILLUSTRATIONS AND SCHEMATIC DIAGRAMS
Transmitter Block Diagram
0 1
6 5 4
6 5 4
0 1
6 5 4
0 1
0 1
BACKPLANE
CONNECTOR
MT-3 FRONT PANEL BOARD
B2
FUSE
(OPTIONAL)
+9.5V
10-17 VOLTS
+ 13.8 VDC NOMINAL
+13.8VDC
B6
Z2
+9.5 VDC
+9.5 VDC CONTINUOUS
RX AUDIO / +13.8V
Z6
+9.5V OUTPUT
J9
+9.5VDC
MIC AUDIO
SQL DE-EMP
INPUT
B20
LED ENA
REFERENCE
INPUT
MIC PTT NTO
+9.5 VDC
OC-3 CRYSTAL CONTROL MODULE
B30
GROUND
B32
GROUND
Z30
GROUND
Z32
GROUND
D30
RX DATA IN
D28
TX DATA OUT
D32
BOOTSTRAP
D20
CHANNEL SEL 0 (LSB)
D22
CHANNEL SEL 1
D24
CHANNEL SEL 2
D26
CHANNEL SEL 3 (MSB)
Z22
TX AUDIO CONTROL
OR
MIC PTT WTO
GROUND
RF OUT
OS-3 SYNTHESIZER MODULE
J17
MIC OUT
B4
MIC IN
Z4
MT-3 AUDIO
PROCESSOR
J16
BALANCED INPUT
SIDE 2
BALANCED INPUT
SIDE 1
J20
Z24
SQL FLAT
INPUT
Z20
DIRECT MOD
INPUT
Z28
J23
T1
600Ω
SUBTONE
INPUT #2
JP1-7
+ 9.5 VDC
SWITCHED
J18
TONE/DIGITAL INPUT
AM(N/C)
AUDIO CONTROL
AM(N/C)
LED ENA
DIRECT MODULATION INPUT
AM(N/C)
+9.5VDC
+9.5VDC
PTT OUTPUT
+9.5V
+ 9.5 VDC PTT
SWITCHED
Z10
B12
J2
Z12
D12
+ 9.5 VDC
SWITCHED
PTT WTO
TRIGGER
8 VDC
SUPPLY
ENA
+8.0V SWITCHED
MT-3 VHF/UHF AMPLIFIER MODULE
RF IN
J3
U2a
RF OUT
FRONT PANEL
N CONNECTOR
TOT INPUT
J1
D10
J7
COMMON 2
SUBTONE #2 INPUT
AM(N/C)
B10
NO2
+ 9.5 VDC PTT
SWITCHED
SUBTONE #1 INPUT
AM(N/C)
PTT WTO
TX
STANDBY
J25
B22
PTT
BALANCED INPUT
Z18
SUBTONE
INPUT #1
AUDIO OUTPUT
SUBTONE #2 OUTPUT
AM(N/C)
J22
J19
600 OHMS
MICROPHONE
INPUT
B18
OR
TOT OUTPUT
+13.8V
NC2
D8
RLY POS
B8
GND
+9.5V
FOR
JP1-7
J35
J33
J25 PIN 3
U2c
TOT INPUT
10
RLY NEG
D2
NC 1
D6
D4
13 U2d
VSWR REVERSE
B26
J14
FORWARD POWER FAIL
INDICATOR
R26
1K0
Q10
PZT2222A
PTT
TX STANDBY
PTT OUTPUT
Z26
R25
27K4
11
Z14
B24
+9.5 VDC PTT SWITCHED
12
PTT TRIGGER
+9.5VDC
PTT OUTPUT
J15
J12
B14
PTT NTO
J13
TOT OUTPUT
TIME OUT
TIMER
J4
COMMON 1
JP1-2
+9.5 VDC
10
RELAY1
Z8
NC 2
REV
SWITCHING
CIRCUITRY
+ 9.5 VDC PTT SWITCHED
+ 9.5 VDC SWITCHED
DE
DANIELS
ELECTRONICS
VICTORIA B.C .
TITLE:
MT-3 TRANSMITTER BLOCK DIAGRAM
DATE.:
19 JULY 1994
DWG No:
MT3TXMNM1C
BOARD NO.: 43-920917
DWN: SHANE AEBISCHER
APRVD:
DWG REV DATE: 9 OCTORBER 1998
BOARD REV.:
1.7
DANIELS
DEELECTRONICS
MT-3 AM Transmitter Main Board Instruction Manual
5-1
This Page Intentionally Left Blank
DANIELS
DE ELECTRONICS
5-2
MT-3 AM Transmitter Main Board Instruction Manual
5.2
MT-3 AM Transmitter Board Electrical Assembly
5.2.1
MT-3 AM Transmitter Board Top Side Component Layout
R42
OPT
ENA
+9.5V
13.8V
FOR
REV
GND
JS3
1ROW X 2PIN
FSW4
BCD-10
28
OS-3H ENHANCED SYNTHESIZER
OC-3 CRYSTAL CONTROL MODULE
JS1
19 11
18 10
FSW2
BCD-10
SYNTHESIZER TP30
GROUND TAB
(Low Power
TP29
Synthesizer
Only)
1R0W X 12PIN
17 9
TP9
TP10
TP4
15 7
14 6
FSW1
BCD-10
13 5
12B 4
OS-3 RF
OUTPUT
TP28
T1
TP25
TP11
TP5
TP27
10
SPT-196
TP6
JA3
14
12
JA2
JA4
TP7
JA5
TP26
JA1
1 3
2 4
MT-3 AUDIO PROCESSOR BOARD
TP12
43-920917
18
MSD
16
1ROW X 6PIN
TP3
JF2
MT-3 FRONT PANEL BOARD
JF1
JF3
TP8
JS2
22
20
16 8
TP2
26
24
TP23
TP24
20 12
1ROW X 9PIN
FSW3
BCD-10
C23
100nF
TP31
OR
TP1
30
LSD
OC-3 RF
OUTPUT
TP32
OST-3H RF
OUTPUT
AUDIO IN
32
SYNTHESIZER GROUND TAB
(Low Power Synthesizer Only)
TP13
TP15
TP17
TP14
TP16
TP19
TP20
TP33
TP18
TP21
TP22
TP34
RELAY1
OPTIONAL
Factory installed jumpers
- Components Not Installed
DANIELS
DE ELECTRONICS
MT-3
Illustrations
AM Transmitter
and Schematic
MainDiagrams
Board Instruction Manual
DANIELS
MT3TXMNM2B
TITLE:
VICTORIA B.C .
MT-3 Transmitter
Component Component
Side SM Layout
Side T/H Designations
DATE:
May 9, 1997
BOARD No.:
DWG No:
9209AS3A
TX3AT9D
DWG REV DATE:
ELECTRONICS
43-920917
5-5
5-3
MT-3 AM Transmitter Main Board Component Layout (Bottom)
LPF34
LPF33
J14
LPF32
x J13 y
J12
Q10
PZT
2222
C2
1µF +
35V
J9
C1
+ 10µF
35V
ORG BLUE
RED
LPF35
R25
27k4
BLK
xx J15
J15 yy
y J25 x
R41
15K
YEL
5.2.2
R26
1k00
GND: BLACK
R40
10K
C10
1 µF
LPF31
LPF30
MODULATION INPUT: YELLOW
LPF29
LPF28
U4
MMAD1108
LPF27
LPF26
LPF25
U3
MMAD1108
LPF24
+ 13.8 VDC: RED
C20 +
4.7µF
16V
U8
MC14536B
R39
221K
LPF20
LPF19
CONN1
F/48 MALE
LPF18
LPF17
LPF16
LPF15
LPF14
LPF12
LPF10
LPF8
LPF3
M2.5 x 10
PAN/PHIL.
SCREW (2)
LPF5
LPF4
LPF2
LPF21
C4
1µF
16V
Q9
D15N
06V
Q7
D5P06V
Q5
D5P06V
+ 9.5 VDC: ORANGE
R24
Q6
Q4
68k1 R22 BC817 BC817
J6
D5
68k1
R19
R20 BYD
J6
10k0
68k1
17J
Q8 R23 R21
ENA: BLUE
BC807 10k0 10K0
R16
C6 C5
BYD17J
R7
BC817 10k0
10nF 100nF
D4
Q3
1k00 R8
J4
U1
y J18 x
27k4
D3
33172 R18
R5 BYD R6
RF IN
10k0
10nF C7
y 10R0 17J 27k4
R4
U6
J3 D8
100nF C8
27k4 R15
LP J21
BAS
x x
D2
10k0 2951
16
D7 BYD17J
J19 J22 y
R14
BAS
R29 82k5
10k0
y y
16
J2
Q1
U2
R3
C14
BC817
4081
x R2 27k4 1k00
R30
10nF
15k0 C15 +
R110R0
4.7µF
J17
R9 221k D1
R12
BYD x x
R10 17J
27k4
J20 J23
J16
100k
R28
y y
R11 R13
27k4 27k4
D6
BYD17J
R43
221k
M2.5 PRESS NUT
y J7 x
C3 16V
10µF
R46
221k
C21
100nF
LPF23
LPF22
R45 R44
221k 221k
R35
27k4
R36 R37
221k 1k00
R38
100k
Q11
C22 R47
BC807-25
100nF 1k00
R34
U7
27k4
33172
R32
1k00
MT-3
R33
68k1 R31
221k
AM AMPLIFIER
C12 C13
10nF 10nF
R17
1k00
LPF1
F1
(3A FUSE OPTIONAL)
J24
43-920917
Factory installed jumpers
Components Not Installed
DANIELS
DE ELECTRONICS
5-4
TITLE:
DATE.:
DWG No:
DANIELS
MT3TXMNM3B
VICTORIA B.C .
MT-3 Transmitter Solder Side SM
T/H Designations
Layout
Designations
ELECTRONICS
9 May 1997
BOARD No.:
43-920917
MT-3
AM Transmitter Main
Board Instruction Manual
9209AS3B
9209AS2D
TX3AT8D
DWG REV DATE:
10 Aug. 1998
5.2.3
Transmitter Main Board Schematic Diagram
LPF16
B6
TP6
LPF
TP5
LPF17
Z6
C3
10uF
LPF
MT-3 FRONT PANEL BOARD
C4
1.0uF
JF2-1
TP1
+9.5V INPUT
6 5 4
+9.5V OUTPUT
SPARE
J9
JF1-2
TP2
RX AUDIO
+13.8V
LPF22
SQL DE-EMP
INPUT
B20
LPF
C10
1.0uF
JF1-1
C13
10nF
C12
10nF
FSW2
FSW1
+9.5V CONTINUOUS
MIC AUDIO
GROUND
TP4
MSD 7
TO ALL 9.5V SUPPLY POINTS
JF2-4
JF3-1
9 0 1
13.8V
6 5 4
9 0 1
9 0 1
11 13 15 10 12 14 16
6 5 4
15 13 11 9
U3
MMAD1108
JF3-2
FSW4
FSW3
6 5 4
BACKPLANE
CONNECTOR
3M
2 LSD
9 0 1
16 14 12 10
U4
MMAD1108
B30
GROUND
B32
GROUND
Z30
GROUND
Z32
GROUND
JF3-3
LPF3
JF2-2
RX MON
MIC PTT NTO
LPF
JF3-4
B28
RX MONITOR
TP3
JF1-3
LED ENA
MIC PTT WTO
JF2-3
P1-4 P1-5
GROUND
MIC OUT
B4
Z4
J16
BALANCED
INPUT #1
J19
LPF19
LPF
LPF
SUBTONE
INPUT #2
Z24
P1-2
AUDIO OUTPUT
T1
AUDIO XFMR
JA1-2
R28
NOT INSTALLED
BALANCED
INPUT
TP33
J23
P1-1 P2-1
P2-4 P2-6
TP18
LPF31
LPF
TP23
LPF
J25
TP24
JA4-1
Z20
LPF
JA2-1
LPF
Z28
J7 Y
9.5V PTT SWITCHED
13.8 V JA5-2
TP19
LPF12
R2
27K4
LPF
Z10
J21
D2
BYD17J
13.8V
LPF
R16
10K0
LPF
TP21
J2
D12
NC
5V Tap 6
FB 7
Vin
Sense
Sd
Gnd
R29
82K5
U6
LP2951
R1
D7
J3 BAS16 10R0
C14
10nF
C15
4.7uF
R30
15K0
D10
D8
NC
LPF8
R13
27K4
R12
27K4
U2c
MC14081
R9
221K0
R6
27K4
D3
BYD17J
10 4
LPF10
Z8
D6
C7
10nF
LPF
D2
J4
NC
C5
100nF
D8
BAS16
R5
10R0
NC
9.5V
D4
NC
B14
LPF14
Q9
D15N06V
B24
LPF
B12
LPF15
TX STANDBY
TP13
JA5-4
Transmitter Main Board Instruction Manual
D26
CHANNEL SEL 3
(Most Significant Bit)
Z22
TX AUDIO CONTROL
FRONT PANEL
N CONNECTOR
RF OUT
JA3-3
OR
9.4Vdc 2
2.2 Vdc
C8
100nF
C22 2.9Vdc
100nF
R35
U7b
MC33172 27k4
R37
1k00
TOT 9.5V
TP25
TOT 9.5V
R39
221k
C23
100nF
R40
J26 10k0
2.9 Vdc
R41
J27 15k0
R38
100k
16
15
14
IN1
OSC INH
13
OUT1
DEC
12
OUT2 U8
11
BYP
10
CLK INH
SET
RESET
VDD
MONO
VSS
MC14536B
J28
TOT OUTPUT
R43 R44 R45 R46
221k 221k 221k 221k
J35
R47
1k00
Q11
J29 J31 J32
BC807-25
Q1
BC817-25
U2b
MC14081
14
ENA
JP1-7 JP1-3
JP1-7
+9.5V
JP1-1
GND
JP1-2
FOR
JP1-6
TP30
JP1-4
J13
JP1-5
LPF35
9.5V
9.5V
R22
68K1
LPF
R14
10K0
R23
10K0
TO ALL 9.5V PTT SWITCHED
SUPPLY POINTS
Q7
D5P06V
Q6
BC817-25
J12
R25
27K4
TO ALL 13.8V SUPPLY POINTS
R26
1K0
Q10
PZT2222A
LPF1
9.5V
R15
10K0
R19
10K0
R20
68K1
Q4
BC817-25
Q5
TP7
D5P06V
J6
J7
MODE 3
MODE 4
Installed
Installed
'Y' Position 'X' Position 'X' Position
J18
'X' Position 'Y' Position 'X' Position
J6
MODE 2
Installed
C2
1.0uF
TO ALL 9.5V SWITCHED
SUPPLY POINTS
D6
BYD17J
AM/FM STANDBY MODES
MODE 1
Not Installed
B2
LPF
D5
BYD17J
FORWARD POWER
FAIL INDICATOR
TP29
9.5V
B26
VSWR REVERSE
LPF34
J14
Z26
J15
QUALIFIED PTT
REV
LPF
13.8V
R42
OPT
TP28
AUDIO
IN +13.8V
TO
J25 PIN3
TP11
Q3
BC817-25
R18
PTT
10K0
R21
10K0
LPF
DANIELS
DE ELECTRONICS
CHANNEL SEL 2
MT-3 VHF/UHF AMPLIFIER MODULE
GND
Q8
R24
BC807-25
68K1
Z12
D24
XXXX
LPF
Z14
LPF26
JA3-2
TP31 TP32
U7a
MC33172
R31
221k R34
27k4
R36
221k
9.5V
R32
1k00
R33
68k1
U2d
MC14081
U1 b
MC33172
R8
27K4
R7
1K0
D4
BYD17J
13
TIME OUT TIMER
TO ALL TOT 9.5V
C21
100nF
11
J34
TOT 9.5V
J33
TOT INPUT
12
R10
100K0
TP26
C6
10nF
9.5V
C20
4.7uF
RELAY1
JA4-4
TP8
10
JA1-4
CHANNEL SEL 1
APPROX 0.8 VDC
U1 a
MC33172
LPF
TP12
D22
TP15
RF IN
GND
B8
TOT
OUTPUT
GND
CHANNEL SEL 0
(Least Significant Bit)
9.5V SWITCHED
LPF
TOT
INPUT
9.5V
J18 Y
R4
27K4
D1
BYD17J
NC
U2a
MC14081
R11
27K4
JA3-4
D20
LPF23
AUDIO
CONTROL
9.5V
R3
1K0
JA2-3
TP27
JA5-1
+8.0V SWITCHED
Vout
Error
PTT
BOOTSTRAP
LPF29
LPF
+9.5V
JA2-4
D32
LPF28
9.5V PTT SWITCHED
UNDER U6
TX DATA OUT
LPF25
DIRECT MODULATION
INPUT
QUALIFIED JA5-3
JA4-3
PTT
LPF
9.5V SWITCHED
LPF
QUALIFIED PTT
TP9
LPF33
D28
LPF24
JP1-7
TONE/DIGITAL
INPUT
RX DATA IN
LPF32
TP10
TO
D30
LPF30
SUBTONE #2 INPUT
LPF21
PTT WTO
PTT OUTPUT
P1-18 P1-20 P1-12 P1-19 P1-11 P2-2 P1-17 P1-9
LPF
B10
PTT NTO
Z16
P3-2
9.5V
RLY NEG
B16
NC
P3-1
LPF27
9.5V
RLY POS
NC
P1-10
9.5V
JA2-2
TP17
DIRECT MOD
INPUT
IMC3
TP16
J24
SUBTONE #1 INPUT
LPF
TP22
SQL FLAT
INPUT
D18
JA1-1
TP20
JA3-1
SUBTONE #2
OUTPUT
JA4-2
LPF20
B22
NC
OS-3 SYNTHESIZER
RF
OUTPUT
TP14
JA1-3
TP34
J20
SUBTONE
INPUT #1
IMC2
P1-3
P2-5
J22
LPF18
Z18
IMC1
D16
OR
LPF
B18
D14
NC
OC-3 CRYSTAL CONTROL MODULE
MT-3 AUDIO
PROCESSOR
MICROPHONE INPUT
BALANCED
INPUT #2
NC
P1-14 P1-15 P1-8 P1-16
P2-3
P1-7
LPF
LPF4
MIC IN
R17
1K0
J17
LPF5
P1-13 P1-6
REFERENCE
INPUT
JF1-4
C1
10uF
C23
D8
J35
LPF35
Q11
R47
T1
TP34
U8
RELAY1
F1
FSW4
STANDARD/LOW FREQUENCY MODULATION
STD MOD VER.
LF MOD VER.
J6
J7
J18
Not Installed
'Y' Position
'Y' Position
Installed
'X' Position
'X' Position
+10 TO +17 VOLTS
+13.8 VDC NOMINAL
LPF2
Z2
LPF
HIGHEST REFERENCE DESIGNATORS
UNUSED REFERENCE DESIGNATORS
DESIGN
F1
OPTIONAL
DE
TITLE:
C9,C11,C16
C17-C19
R27
-----
J1,J5,J8
LPF6,LPF7
U5
-----
J10,J11
LPF11,LPF13
Q2
-----
DANIELS
ELECTRONICS
VICTORIA B.C.
MT-3 TRANSMITTER BOARD SCHEMATIC DIAGRAM
DATE: 8 APRIL 1992
DWG No.: MT3TXMNM4B
BOARD No.: 43-920917
DWG BY: MIKE GAUBE
APRVD:
DWG REV DATE: 9 OCTOBER 1998
BOARD REV:
1.7
5-5
5.3
5.3.1
MT-3 Front Panel Board
MT-3 Front Panel Board Component Layout
Factory Installed Solder Jumper.
Solder Jumper On Solder Side Of PCB.
2 Y
3 X
P1
MIC
PF1
J1 X
PF3
SW1
b a
e d
KEYED
J2 3 4
NORM
D1
PF2
43-921212
MT3TXMNM5A
DANIELS
DE ELECTRONICS
5-6
MT-3 AM Transmitter Main Board Instruction Manual
5.3.2
PF3-1
PF3-2
PF3-4
PF3-3
MT-3 Front Panel Board Schematic
PF3
P1
SPARE
SPARE
+13.8V
RX MON
+13.8V
RX AUDIO
+9.5V OUT
RX MON
MIC PTT
MIC INPUT 2
+9.5V IN
SW1
F NORM C
+9.5V OUT
PF2
PF2-1
PF2-4
KEYED
D1
LED ENA
PF2-3
MIC PTT NTO
PF2-2
J1
PF1
MIC PTT
MIC PTT WTO
J2
PF1-3
MIC-3
RX AUDIO
MIC
MIC-4
PF1-2
MIC-2
MIC INPUT
PF1-1
C1
N/I
MIC-1
PF1-4
DE
TITLE:
DANIELS
ELECTRONICS
VICTORIA B.C .
MT-3 FRONT PANEL BOARD
DATE.:
07 APRIL 1992
MT3TXMNM6A
DWG No:
DWN:
BOARD NO.: 43-921212
M. GAUBE
APRVD:
DWG REV DATE: 28 MAY 97
BOARD REV.:
1.2
DANIELS
DE ELECTRONICS
MT-3 AM Transmitter Main Board Instruction Manual
5-7
5.4
MT-3 AM Audio Processor Electrical Assembly
5.4.1 MT-3 AM Audio Processor Component Layout
R1
5k0
Microphone
Input Level
Adjust
R4
50k0
Automatic
Modulation
Control Input
Adjust
D2
1N5221B
R16
5k0
Balanced
Input Level
Adjust
C8
680nF
C3
680nF
C12
4.7uF
D1
1N5221B
P8
R14
100k0
Modualtion
Control Output
Adjust
P5
C19
1.0uF
U2
MC33174
C21
4.7uF
C11
2.2uF
FB 1
U1
SA571D
P1
C2
470nF
P5
wo # xxxx
C9
4.7uF
P6
P7
P2
P3
C5
470nF
C10
470nF
C15
C16
4.7nF 2.2nF
R7
1k2 TEMP
PCB 50049-04
Component Side
TP2
R3
49k9
TP 5
C14
100nF
R15
49k9
JU6
C17
C25
330pF 150pF
TP 8
C20
220pF
R22
3K48
R19
5k11
R29
5k11
R20
39k2
R28
82k5
C22
680pF
JU7
JU3
JU9
R23
51k1
R32
51k1
R24
15k4
R31
15k4
C6
100nF
C7
10nF
R8
4k75
R13
18k2
JU4
R11
27K4
P1
R17
10k0
TP 4
P5
P2
C1
4.7nF
R10
27K4
R5
30K9
JU8
P3
R30
47k5
R6
100k0
R18
C13
470k0 1.0nF
TP7
TP 6
JU5
C23
220pF
R26
3M3
R27
681R0
R9
10k0
R25
82k5
C18
220pF
TP1
JU2
TP 3
R2
20k0
JU1
- JUMPERS INSTALLED
Solder Side
- COMPONENTS NOT INSTALLED
DANIELS
DE ELECTRONICS
5-8
DANIELS
ELECTRONICS
MT3AMTXM8B
VICTORIA B.C .
TITLE:
TX
AM
AUDIO
PROCESSOR
LAYOUT
AM
TRANSMITTER
THROUGH
HOLEMOUNT
LAYOUT
DESIGNATIONS
TITLE:
TX
AM
AUDIO
PROCESSOR
SURFACE
DESIGNATIONS
TITLE:TX
AM
AUDIO
AUDIO
PROCESSOR
PROCESSOR
OUTLINE
OUTLINE
(bottom)
DATE: 24 AUGUST 1998
DWG
No:
VAP130AS2C
No:
VAP130AS1C
DWG
DWGNo:
No: VAP130AT2B
XXXXXAT1
VAP130AT1A
DRAWN
BY: MainSHANE
MT-3 AM
Transmitter
Board Instruction
Manual
DWG
06
/98
DWG
DWG
DWGREV
REV
REV DATE:
DATE:AUGUST
DATE: MARCH
AUGUST
OCTOBER
25/98
24/98
/ 98
5.4.2
MT-3 AM
Audio Processor Schematic Diagram
8.0V
8.0V
C14
100nF
JU9
C6
100nF
Automatic Modulation Control
R3
49K9
TP5
C15
4.7nF
C7
10nF
U1a
SA571D
U2a
MC33174
R15
49K9
R29
5K11
AMC Bypass
TP1
Microphone Input
Level Adjust
CW
P1
Microphone
C2
470nF
R2
20K0
Var G
Output
FB1
TP6
JU1
C5
470nF
R9
10K0
2 Rect In
R18
470K0
C13
1.0nF
U2 c
MC33174
R28
82K5
10
U2 d
MC33174
C25
150pF
R25
82K5
R14
100K0
13
C20
220pF
C19
1.0uF
Mod output
P3
JU5
R8
4K75
CW
R22
3K48
JU6
Modulation Control
Output Adjust
R4
50K0
TP8
14
C18
220pF
R31
15K4
Approx. 200mV rms @ 90% mod.
12
R6
100K0
TP2
Automatic Modulations
Control Input Adjust
JU7
R24
15K4
R32
51K1
R23
51K1
C17
330pF
C3
680nF
GND
P5
Inv In
U2 b
MC33174
R19
5K11
C22
680pF
C23
220pF
11
Rect Cap 1
R3
3.0 KHZ BUTTERWORTH LOW PASS FIILTER
R30
47K5
R20
39K2
C1
4.7nF
13.8 Vdc
TP3
Vcc
8 THD
Trim
C16
2.2nF
13
R1
5K0
3.0 KHZ BESSEL LOW PASS FILTER
R7
1K2
JU3
R5
30K9
JU2
Automatic Level Control
U1 b
SA571D
TP7
9 THD
Trim
P1
D2
1N5221B
Balanced Input
P1
R16
5K0
ALC Bypass
CW
Output
R27
681R0
D1
1N5221B
Var G
R17
10K0
JU8
11
R3
15 Rect In
Balanced Input
Level Adjust
8.0V
P2
C12
4.7uF
R26
3M30
14
Inv In
C21
4.7uF
C10
R13
470nF 18K2
10
Rect Cap 16
C11
2.2uF
TP4
R10
27K4
R11
27K4
12
C8
680nF
C9
4.7uF
P1
JU4
P2
9.5 Vdc
9.5V
P8-1
J7 -1
OPTIONAL
P3
P5
P7 -1
J6 -1
J8 -1
MT-3 TX TIME-OUT-TIMER
P9 -1
P3
J5 -1
HIGHEST REFERENCE DESIGNATORS
P6 -1
C25
D2
FB1
JU9
P9
R32
TP8
U2
------
UNUSED REFERENCE DESIGNATORS
C4, C24
P4
R12, R21
DE
TITLE:
DATE:
DANIELS
ELECTRONICS
VICTORIA B.C.
MT-3 AM Tx AUDIO BOARD SCHEMATIC DIAGRAM
MARCH 1998
DWN BY: STAN POLYAKOV.
APRVD:
DWG No: MT3AMTXM9B
DWG REV DATE: 19 MAY 98
BOARD No:
BOARD REV:
50049-04
04
DANIELS
DE ELECTRONICS
MT-3 AM Transmitter Main Board Instruction Manual
5-9
5.4.3
TX Time-Out-Timer Electrical Assembly
5.4.3.1
TX Time-Out-Timer Component Layout
J8-1
R17 R11
1k00 15k0
Q1
BC807-25
U2
R8
100k
R7
1k00
R10
10k0
R3
68k1
R12
opt.
R6
221k
R5
27k4
C2
J5-1
100nF
JU3
J5-1
JU5
JU4
JU6
J8-1
JU1
R13
221k
R14
221k
R15
221k
JU2
R16
221k
C1
C4
100nF
R1
C3
221k 100nF
U1
4.7µF
MC14536B
R4
R2
1k00 27k4
R9
221k
J6-1
MC33172
J7-1
50027-02
5.4.3.2
J6-1
J7-1
MT3APM3
MT3APM5
TX Time-Out-Timer Schematic Diagram
INSTALL JUMPERS
+9.5V_CONTINUOUS
J7
J5
+9.5V_CONTINUOUS
1 GND
C1
4.7uF
C2
100nF
R4
27k4
R1
221k
J6
R2
1k00
9.4VDC
2.2VDC
Vout
9.5V
2.9VDC
U1 b
MC33172
R3
68k1
R5
27k4
+9.5V_CONTINUOUS
R7
1k00
2.0V
2.4V
R9
221k
U1a
MC33172
C4
100nF
R10
10k0
R6
221k
2.9VDC
R8
100k
0V
C3
100nF
TOT_I/P_TRIGGER
VDD
SET
MONO
RESET
OSC INH
IN1
OUT1
U2
DEC
OUT2
BYP
CLK INH
VSS
16
15
R13
221k
R14
221k
R15
221k
0.021VDC
13
12
0.135VDC
J8
TOT_O/P_TRIGGER
R17
1k00
11
10
MC14536B
JU3
JU1
JU4
JU5
JU6
R11
15k0
JU2
Vin
R12
OPT
C4
J8
Q1
R17
U2
-----
DE
TITLE:
DANIELS
ELECTRONICS
UNUSED REFERENCE DESIGNATORS
DANIELS
ELECTRONICS
VICTORIA B.C .
TITLE:
TX AP TIME OUT TIMER COMPONENT SIDE SM
SM /LAYOUT
TH DESIGNATIONS
DATE:
15 APRIL 1996
BOARD No.:
50027-02
DWG No:
TOTAS2A
TOTAS
TOTAS1
DWG REV DATE:
2 SEPTEMBER 1997
J1-J4
-----
-----
DWG No:
VICTORIA B.C.
MT-3 TX TIME OUT TIMER SCHEMATIC DIAGRAM
DATE: 19 JANUARY 1996
5-10
APPROX 0.8 VDC
14
HIGHEST REFERENCE DESIGNATORS
DANIELS
DE ELECTRONICS
Q1
BC807-25
R16
221k
MT3APM4
BOARD No: 50027-02
DWN BY: MICHAEL GAUBE
APRVD:
DWG REV DATE:
16 JANUARY 1996
BOARD REV:
VERSION 0.2
MT-3 AM Transmitter Main Board Instruction Manual
6
PARTS LISTS
6.1 Transmitter Main Board Parts List
6.1.1
Transmitter Main Board Electrical Parts List
Ref
Design
Description
Part No.
C1
C2
C3
C4
C5
C6
C7
C8
C10
C12
C13
C14
C15
C20
C21
C22
C23
CAP,
CAP,
CAP,
CAP,
CAP,
CAP,
CAP,
CAP,
CAP,
CAP,
CAP,
CAP,
CAP,
CAP,
CAP,
CAP,
CAP,
1055-6D106K35
1055-5B105M35
1055-6C106M16
1055-5A105M16
1008-5A104K5R
1008-4A103K5R
1008-4A103K5R
1008-5A104K5R
1008-6H105J5R
1008-4A103K5R
1008-4A103K5R
1008-4A103K5R
1055-5B475K16
1055-5B475K16
1008-5A104K5R
1008-5A104K5R
1016-5A104K63
D1-D6
D7
D8
DIODE, BYD17J RECTIFIER SOD87
DIODE, BAS16 SWITCHING, SOT23
DIODE, BAS16 SWITCHING, SOT23
2101-BYD17J00
2100-BAS16000
2100-BAS16000
F1
FUSE, 3AMP FAST-BLO, 1-1/4 IN.
5604-5GAGC030
FSW1-4
SWITCH, BCD-10 STEPS,5 PIN,PCB
5273-10BCD001
J30
CONNECTOR, F\48_MALE, R\A_P
3720-6048M0RA
LPF1-35
FILTER, SM, LPF1 EM1\LPF, 360pF F
1306-T361F2D5
Q1
Q3
Q4
Q5
Q6
Q7
Q8
Q9
Q10
Q11
TRANSISTOR, BC817-25 NPN SOT23
TRANSISTOR, BC817-25 NPN SOT23
TRANSISTOR, BC817-25 NPN SOT23
MOSFET, D5P06V P-CHAN., DPAK
TRANSISTOR, BC817-25 NPN SOT23
MOSFET, D5P06V P-CHAN., DPAK
TRANSISTOR, BC807-25 PNP SOT23
MOSFET, D15N06V N-CHAN., DPAK
TRANSISTOR, PZT2222A NPN ST223
TRANSISTOR, BC807-25,PNP,SOT23
2120-BC817025
2120-BC817025
2120-BC817025
2144-D5P06V00
2120-BC817025
2144-D5P06V00
2120-BC807025
2144-D15N06VO
2120-PZT2222A
2120-BC807025
R1
R2
R3
R4
RES., SM, 10R0 0805, 1% 100ppm
RES, SM, 27K4 0805, 1% 100ppm
RES, SM, 1K0 0805, 1% 100ppm
RES, SM, 27K4 0805, 1% 100ppm
1150-1A10R0FP
1150-4A2742FP
1150-3A1001FP
1150-4A2742FP
SM, 10uF TANT, 20%, 35V
SM, 10uF TANT, 20%, 35V
SM, 10uF TANT, 20%, 16V
SM, 10uF TANT, 20%, 16V
SM, 100nF CER, 0805, X7R
SM, 10nF CER 0805 X7R 50V
SM, 10nF CER 0805 X7R 50V
SM, 100nF CER, 0805, X7R
SM, 10uF CER/2225 50 X7R
SM, 10nF CER 0805 X7R 50V
SM, 10nF CER 0805 X7R 50V
SM, 10nF CER 0805 X7R 50V
SM, 47uF TANT, 10%, 16V
SM, 47uF TANT, 10%, 16V
SM100nF CER,0805,X7R,50V
SM100nF CER,0805,X7R,50V
100nF FILM, MMK5, 10%, 63V
DANIELS
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MT-3 AM Transmitter Main Board Instruction Manual
6-1
Ref
Design
Description
Part No
R5
R6
R7
R8
R9
R10
R11
R12
R13
R14
R15
R16
R17
R18
R19
R20
R21
R22
R23
R24
R25
R26
R28
R29
R30
R31
R32
R33
R34
R35
R36
R37
R38
R39
R40
R41
R42
R43
R44
R45
R46
R47
RES, SM, 10R0 0805, 1% 100ppm
RES, SM, 27K4 0805, 1% 100ppm
RES, SM, 1K0 0805, 1% 100ppm
RES, SM, 27K4 0805, 1% 100ppm
RES, SM, 221K0 0805, 1% 100ppm
RES, SM, 100K0 0805, 1% 100ppm
RES, SM, 27K4 0805, 1% 100ppm
RES, SM, 27K4 0805, 1% 100ppm
RES, SM, 27K4 0805, 1% 100ppm
RES, SM, 10K0 0805, 1% 100ppm
RES, SM, 10K0 0805, 1% 100ppm
RES, SM, 10K0 0805, 1% 100ppm
RES, SM, 1K0 0805, 1% 100ppm
RES, SM, 10K0 0805, 1% 100ppm
RES, SM, 10K0 0805, 1% 100ppm
RES, SM, 68K1 0805, 1% 100ppm
RES, SM, 10K0 0805, 1% 100ppm
RES, SM, 68K1 0805, 1% 100ppm
RES, SM, 10K0 0805, 1% 100ppm
RES, SM, 68K1 0805, 1% 100ppm
RES, SM, 27K4 0805, 1% 100ppm
RES, SM, 1K0 0805, 1% 100ppm
RES, SM, NOT INSTALLED 0805, 1% 100ppm
RES, SM, 82K5 0805, 1% 100ppm
RES, SM, 15K0 0805, 1% 100ppm
RES, SM221k 0805, 1%, 100ppm
RES, SM, 1k00 0805, 1%, 100ppm
RES, SM, 68k1 0805, 1%, 100ppm
RES, SM, 27k4 0805, 1%, 100ppm
RES, SM, 27k4 0805, 1%, 100ppm
RES, SM, 221k 0805, 1%, 100ppm
RES, SM, 1k00 0805, 1%, 100ppm
RES, SM, 100k 0805, 1%, 100ppm
RES, SM, 221k 0805, 1%, 100ppm
RES, SM, 10k0 0805, 1%, 100ppm
RES, SM, 15k0 0805, 1%, 100ppm
RESOPT METAL FILM, 5%,05W
RES, SM, 221k 0805, 1%, 100ppm
RES, SM, 221k 0805, 1%, 100ppm
RES, SM, 221k 0805, 1%, 100ppm
RES, SM, 221k 0805, 1%, 100ppm
RES, SM, 1k00 0805, 1%, 100ppm
1150-1A10R0FP
1150-4A2742FP
1150-3A1001FP
1150-4A2742FP
1150-5A2213FP
1150-5A1003FP
1150-4A2742FP
1150-4A2742FP
1150-4A2742FP
1150-4A1002FP
1150-4A1002FP
1150-4A1002FP
1150-3A1001FP
1150-4A1002FP
1150-4A1002FP
1150-4A6812FP
1150-4A1002FP
1150-4A6812FP
1150-4A1002FP
1150-4A6812FP
1150-4A2742FP
1150-3A1001FP
1150-4A1502FP
1150-4A8252FP
1150-4A1502FP
1150-5A2213FP
1150-3A1001FP
1150-4A6812FP
1150-4A2742FP
1150-4A2742FP
1150-5A2213FP
1150-3A1001FP
1150-5A1003FP
1150-5A2213FP
1150-4A1002FP
1150-4A1502FP
OPTIONAL
1150-5A2213FP
1150-5A2213FP
1150-5A2213FP
1150-5A2213FP
1150-3A1001FP
RELAY1
RELAY, 9VDC RELAY 9VDC, 2_FORM_C P
5310-2C09P005
T1
TRANSFORMER, AUDIO XFMR AUDIO 600R 1:1
1280-600P6005
U1
U2
U3
U4
U6
IC, MC33172 DUAL_OP_AMP, SOIC, MC14081 QUAD_2I\P_AND, S
IC, MMAD1108 8_DIODE\ARY. SO1
IC, MMAD1108 8_DIODE\ARY. SO1
IC, LP2951 PROG._VOLT_REG S
2302-33172N08
2375-40810N14
2331-11080N16
2331-11080N16
2305-29510N08
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MT-3 AM Transmitter Main Board Instruction Manual
Ref
Design
Description
Part No.
U7
U8
IC, MC33172 DUAL OP AMP, SO-8
IC, MC14536B PROGRAM TIMER, SO-16W
2302-33172N08
2375-45360W16
6.1.2
Transmitter Main Board Mechanical Parts List
Description
Part No.
Qty.
CABLE, SMB-SMB PLUG, RG316,12cm
CABLE, SMA-SMB PLUG, RG188,15cm
CABLE, SMA PLUG-PLUG, RG188, 19 cm
$7910-WP0WP012
$7910-SP0WP015
$7910-SP0SP019
1 (Crystal Control)
1 (Synthesizer)
1 (Opt. - Synth only)
CONN, TYPE F 48 MALE, RA, PCB MTG
CONN/RF, SMA JACK-JACK BULKHEAD
3720-6048M0RA
5118-J875BJ05
1 (Opt. - Synth only)
CASE, 14HP RF PLUG-IN, MT-3 TX
3802-62502010
FASTENER, QUICK RELEASE
3702-10000120
GASKET, BeCu,3FINGER,.25",CLIP
5630-12023250
HANDLE, FRONT PANEL, 14HP, GREY
3702-10000614
HOLE PLUG, 0.25" HOLE, NYLON, BLACK
5671-250N062B
LOCKWASHER, M3, SPLIT,A2 STEEL
5814-3M0LK00S
MIC CONN, 4 PIN MALE, BLACK
5040-114ST0BK
NAMEPLATE, BLANK, 14HP, ALUM.
3702-10001214
NUT, M2.5, HEX, 5.0mm, STEEL/Ni
NUT, M2.5, SQUARE, 5.0mm, ZINC
NUT PRESS, M2.5, 5.6mm OD, PC MNT
5813-2M5HX50N
5813-2M5SQ50Z
5833-T2M55615
PANEL/FRNT,W/IDENT:TX-EXTR.VER
PANEL, REAR,POS.4,14HP EXTRSN.
3802-61002101
3702-63002101
SCREW, M3 x 8, PAN/PHIL, BLACK
SCREW, M3 x8,OVAL C/S/PHIL,A2
SCREW, M2.5 X 10, CHEESE/SLOT, A2
SCREW, M2.5 X 12, FLAT/PHIL, Ni
SCREW, M3 X 6, OVAL C/S/PHIL, Ni
SCREW, M3 X 6 PAN/PHIL, A2
SCREW, M5 X 8 FLAT/PHIL, A2
5812-3M0PP08T
5812-3M0VP08S
5812-2M5CS10S
5812-2M5FP12N
5812-3M0VP06N
5812-3M0PP06S
5812-5M0FP08S
TAB, GROUND, MT-3 SYNTH., BRASS
3702-67800905
2 (Synthesizer only)
WIRE, TFE/STRAND., 24AWG, VIOL (13.5 cm)
WIRE, TFE/STRAND., 24AWG, ORG (12.5 cm)
WIRE, TFE/STRAND., 24AWG, RED (11.0 cm)
WIRE, TFE/STRAND., 24AWG, YELLOW (9.5 cm)
7121-24S19367
7121-24S19363
7121-24S19362
7121-24S19364
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MT-3 AM Transmitter Main Board Instruction Manual
6-3
Description
Part No.
Qty.
WIRE, TFE/STRAND., 24AWG, BLACK (9.0 sm)
WIRE, TFE/STRAND., 24AWG, BROWN (16.0sm)
7121-24S19360
7121-24S19361
6.1.3
MT-3 Front Panel Board Electrical Parts List
Ref
Desig
Description
Part No.
D1
LED, RED, 5 mm OD, T-1 3/4
2010-503001RD
PF1
PF2
HEADER, 0.1", RA, 2 ROW X 2 PIN
HEADER, 0.1", RA, 2 ROW X 2 PIN
5010-H202RA9T
5010-H202RA9T
SW1
SWITCH, TOG/DPDT, ON-OFF-ON, PCB/STR
5215-T2031V02
PCB
MT-3 TX FRONT PANEL
4321-40921211
6.2
MT-3 AM Audio Processor Parts List
6.2.1
MT-3 AM Audio Processor Electrical Parts List
Ref
Design
C1
C2
C3
C5
C6
C7
C8
C9
C10
C11
C12
C13
C14
C15
C16
C17
C18
C19
C20
C21
C22
C23
C25
Description
CAP., SM, 4.7nF CER., 1206, X7R
CAP., 470nF FILM, MMK5,10%,63V
CAP., SM, 680nF TANT., 10%, 35V
CAP., 470nF FILM, MMK5,10%,63V
CAP., SM, 100nF CER., 0805, X7R, 50
CAP., SM, 10nF CER., 0805, X7R
CAP., SM, 680nF TANT., 10%, 35V
CAP., SM, 4.7uF TANT., 10%, 16V
CAP., 470nF FILM, MMK5,10%,63V
CAP., SM, 2.2uF TANT., 20%, 20V
CAP., SM, 4.7uF TANT., 10%, 16V
CAP., SM, 1.0nF CER., 0805, X7R, 50V
CAP., SM, 100nF CER., 0805, X7R, 50V
CAP., 4.7nF FILM, MMK5, 10%, 63V
CAP., 2.2nF FILM, MMK5, 10%, 63V
CAP., SM, 330pF CER., 0805,C0G
CAP., SM, 220pF CER., 0805,C0G
CAP., SM, 1.0uF TANT., 20%, 35V
CAP., SM, 220pF CER., 0805,C0G
CAP., SM, 4.7uF TANT., 10%, 16V
CAP., SM, 680pF CER., 1206,C0G
CAP., SM, 220pF CER., 0805,C0G
CAP., SM, 150pF CER., 0805,C0G
Part No.
1008-3B472K5R
1016-5D474K63
1055-4B684K35
1016-5D474K63
1008-5A104K5R
1008-4B103K5R
1055-4B684K35
1055-5B475K16
1016-5D474K63
1055-5B225K20
1055-5B475K16
1008-3A102K5R
1008-5A104K5R
1016-3A472K63
1016-3A222K63
1008-2A331J1G
1008-2A221J1G
1055-5B105M35
1008-2A221J1G
1055-5B475K16
1008-2B681J1G
1008-2A221J1G
1008-2A151J1G
D1
D2
DIODE, 1N5221B ZENER 3.9V,DO35
DIODE, 1N5221B ZENER 3.9V,DO35
2002-1N5221B0
2002-1N5221B0
FB1
FERRITE BEAD, SM,FERRITE BEAD 43MIX,.18x.12
1213-43181200
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DE ELECTRONICS
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MT-3 AM Transmitter Main Board Instruction Manual
Ref
Design
Description
Part No
P1-P5
PCB
HEADER 01", R/A, 2 ROW X 2PIN
AUDIO PROCESSOR, VT-3A130
5010-H202RA9T
4322-30500494
R1
R2
R3
R4
R5
R6
R7
R8
R9
R10
R11
R13
R14
R15
R16
R17
R18
R19
R20
R22
R23
R24
R25
R26
R27
R28
R29
R30
R31
R32
POT., SM, 5K0 4mm SQ, 11T,SIDE
RES., SM, 20K0 0805, 1%,100ppm
RES., SM, 49K9 0805, 1%,100ppm
POT., SM, 50K0 4mm SQ, 50K, 11T,SIDE
RES., SM, 30K9 0805, 1%,100ppm
RES., SM, 100K0 0805, 1%,100ppm
TEMPSISTOR, 1K2 PTC, 10%,AXIAL
RES., SM, 4K75 0805, 1%,100ppm
RES., SM, 10K0 0805, 1%,100ppm
RES., SM, 27K4 0805, 1%,100ppm
RES., SM, 27K4 0805, 1%,100ppm
RES., SM, 18K2 0805, 1%,100ppm
POT., SM, 100K0 4mm SQ, 100K,11T,SIDE
RES., SM, 49K9 0805, 1%,100ppm
POT., SM, 5K0 4mm SQ, 11T,SIDE
RES., SM, 10K0 0805, 1%,100ppm
RES., SM, 470K0 0805, 1%,100ppm
RES., SM, 5K11 0805, 1%,100ppm
RES., SM, 39K2 0805, 1%,100ppm
RES., SM, 3K48 0805, 1%,100ppm
RES., SM, 51K1 0805, 1%,100ppm
RES., SM, 15K4 0805, 1%,100ppm
RES., SM, 82K5 1206, 1%,100ppm
RES., SM, 3M30 0805, 5%,200ppm
RES., SM, 681R0 0805, 1%,100ppm
RES., SM, 82K5 1206, 1%,100ppm
RES., SM, 5K11 0805, 1%,100ppm
RES., SM, 47K5 0805, 1%,100ppm
RES., SM, 15K4 0805, 1%,100ppm
RES., SM, 51K1 0805, 1%,100ppm
1174-DM2502J0
1150-4A2002FP
1150-4A4992FP
1174-DM3503J0
1150-4A3092FP
1150-5A1003FP
1181-3AGD122K
1150-3A4751FP
1150-4A1002FP
1150-4A2742FP
1150-4A2742FP
1150-4A1822FP
1174-DM4104J0
1150-4A4992FP
1174-DM2502J0
1150-4A1002FP
1150-5A4703FP
1150-3A5111FP
1150-4A3922FP
1150-3A3481FP
1150-4A5112FP
1150-4A1542FP
1150-4B8252FP
1150-6A3304JL
1150-2A6810FP
1150-4B8252FP
1150-3A5111FP
1150-4A4752FP
1150-4A1542FP
1150-4A5112FP
U1
U2
IC, SA571D COMPANDOR, SO-16L
IC, MC33174 QUAD OP AMP,SO-14
2327-SA571D00
2304-33174N14
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MT-3 AM Transmitter Main Board Instruction Manual
7
REVISION HISTORY
ISSUE DATE
REVISION
May 97
• First Issue.
March 98
• To improve performance and efficiency of the Audio Processor Board.
ECO #541.
- C18 was 82pF is now 150pF
- R20 was 8k25 is now 3k01
- R21 was 1M0 is now not installed
- R26 was 470k is now 3M30
- Moved SM jumpers to the SM side of the PCB. Moved P1, P2 & P5
to the correct positions. Added land pattern to the PCB for R21.
June 98
• Corrected the part number for D1 and D2 on the MT-3 AM Audio
Processor Electrical Parts List.
December 98 • The Butterworth filter stages were changed to Bessel filters to improve
the differetnial group delay of the AM Transmitter. ECO #563.
- The AM Audio Processor PCB was 50049-02 is now 50049-04.
• Updated the DE logo and added the statutary notice to the title page.
Corrected the drawing numbers on the Transmitter layout and schematic
drawing.
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MT-3 AM Transmitter Main Board Instruction Manual

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Producer                        : Acrobat Distiller 4.0 for Macintosh
Modify Date                     : 2000:04:06 11:03:07-07:00
Page Count                      : 40

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