Parts List
Table Of Contents
- 1GENERAL
- 2SYSTEM OVERVIEW
- 2.1Transmitter Operation
- 2.2Frequency Selection
- 2.2.1Synthesizer Transmitter
- 2.3Transmitter Assembly and Adjustment
- 2.3.1Complete Transmitter Alignment
- 2.3.2Frequency Change
- 2.3.3Output Power Adjustment
- 2.3.4Deviation Setting
- 2.3.5Setting RF Alarm Thresholds
- 2.4Recommended Test Equipment List
- 2.5Repair Note
- 2.6Printed Circuitboard Numbering Convention
- 3ILLUSTRATIONS
- 4PARTS LIST
- 5REVISION HISTORY
- TRANSMITTER MAIN BOARD
- 1GENERAL
- 2THEORY OF OPERATION
- 2.1 Transmitter Main Board
- 2.1.1General
- 2.1.2Transmitter Push-To-Talk
- 2.1.2.1Microphone PTT
- 2.1.2.2PTT With Time-Out-Timer
- 2.1.2.3PTT No Time-Out-Timer
- 2.1.2.4Optional Relay
- 2.1.2.5PTT Output
- 2.1.2.6PTT Voltage Switching
- 2.1.2.7Transmitter Standby Modes
- 2.1.3Audio Circuits
- 2.1.3.1Microphone Audio
- 2.1.3.2Received Audio
- 2.1.4Channel Selection
- 2.1.4.1Synthesized Transmitter
- 2.1.4.2Crystal Controlled Transmitter
- 2.1.5Amplifier Circuits
- 2.1.6Time-Out-Timer Circuitry
- 2.2MT-3 Front Panel Board
- 2.3MT-3 Audio Processor (Version 1.6)
- 2.3.1General
- 2.3.2Power Requirements
- 2.3.3Audio Processor Turn-on Time
- 2.3.4Audio Processor Signals
- 2.3.4.1Audio Processor Outputs
- 2.3.4.2Audio Processor Modulation Output
- 2.3.4.3Audio Processor Low Frequency / Direct Mod. Output
- 2.3.4.4Audio Processor Inputs
- 2.3.4.5Audio Processor Microphone Input
- 2.3.4.6Audio Processor Balanced Input
- 2.3.4.7Audio Processor Auxiliary Input
- 2.3.4.8Audio Processor Subtone Inputs
- 2.3.4.9Audio Processor Direct Modulation Input
- 2.4MT-3 Audio Processor (Version 1.8)
- 2.4.1General
- 2.4.2Power Requirements
- 2.4.3Audio Processor Turn-on Time
- 2.4.4Audio Processor Signals
- 2.4.4.1Audio Processor Outputs
- 2.4.4.2Audio Processor Modulation Output
- 2.4.4.3Audio Processor Low Frequency / Direct Mod. Output
- 2.4.4.4Audio Processor Inputs
- 2.4.4.5Audio Processor Microphone Input
- 2.4.4.6Audio Processor Balanced Input
- 2.4.4.7Audio Processor Auxiliary Input
- 2.4.4.8Audio Processor Subtone Inputs
- 2.4.4.9Audio Processor Direct Modulation Input
- 2.5Low Frequency Modulation
- 3TRANSMITTER ALIGNMENT
- 3.1General
- 3.2Repair Note
- 3.3Printed Circuitboard Numbering Convention
- 3.4Recommended Test Equipment List
- 3.5Standard Factory Settings and Jumper Configuration
- 3.5.1MT-3 Transmitter Board Factory Configuration
- 3.5.2MT-3 Audio Processor Factory Configuration (Version 1.6)
- 3.6MT-3 Transmitter Board Alignment
- 3.6.1General
- 3.6.2MT-3 Transmitter Board Test Points
- 3.7Module Installation and Removal
- 3.8MT-3 Audio Processor Alignment (Version 1.6)
- 3.8.1General
- 3.8.2MT-3 Audio Processor Standard Deviation Adjustment
- 3.9Standard Factory Settings and Jumper Configuration
- 3.9.1MT-3 Audio Processor Factory Configuration (Version 1.8)
- 3.10MT-3 Audio Processor Alignment (Version 1.8)
- 3.10.1General
- 3.10.2MT-3 Audio Processor Standard Deviation Adjustment
- 3.11Low Frequency Modulation Configuration
- 3.11.1MT-3 Transmitters
- 3.11.2MT-3 Transmitter Audio Processors
- 3.11.3Synthesizer and Crystal Controlled Oscillator
- 3.11.4Tuning the Transmitter
- 4TRANSMITTER INTERCONNECT PIN DEFINITIONS
- 5ILLUSTRATIONS AND SCHEMATIC DIAGRAMS
- 5.1Transmitter Block Diagram
- 5.2Transmitter Main Board Electrical Assembly
- 5.2.1Transmitter Main Board Top Side Component Layout
- 5.2.2Transmitter Main Board Bottom Side Component Layout
- 5.2.3Transmitter Main Board Schematic Diagram
- 5.3Front Panel Board
- 5.3.1Front Panel Board Component Layout
- 5.3.2Front Panel Board Schematic
- 5.4Audio Processor Electrical Assembly (Version 1.6)
- 5.4.1Audio Processor Component Layout
- 5.4.2Audio Processor Schematic Diagram
- 5.5Audio Processor Electrical Assembly (Version 1.8)
- 5.5.1Audio Processor Component Layout
- 5.5.2Audio Processor Schematic Diagram
- 6PARTS LISTS
- 6.1Transmitter Main Board Parts List
- 6.1.1Transmitter Main Board Electrical Parts List
- 6.1.2Transmitter Main Board Mechanical Parts List
- 6.1.3MT-3 Front Panel Board Electrical Parts List
- 6.2MT-3 Audio Processor Parts List (Version 1.6)
- 6.2.1MT-3 Audio Processor Electrical Parts List (Version 1.6)
- 6.3MT-3 Audio Processor Parts List (Version 1.8)
- 6.3.1MT-3 Audio Processor Electrical Parts List (Version 1.8)
- 7REVISION HISTORY
- AUDIO PROCESSOR
- 1 FM AUDIO PROCESSOR
- 2 SIGNALS
- 3 THEORY OF OPERATION
- 4 ALIGNMENT
- 5 TROUBLESHOOTING - TEST EQUIPMENT NEEDED
- 6 TEMPERATURE COMPENSATION
- 7 ILLUSTRATIONS, TABLES AND SCHEMATIC DIAGRAMS
- 8 FM AUDIO PROCESSOR PARTS LIST
- 9 AM AUDIO PROCESSOR
- 9.1 Introduction
- 9.2 Performance Specifications
- 9.3 Audio Specifications
- 9.4 Audio Circuits
- 9.5 Power Requirements
- 9.6 Transmitter Standby Modes
- 9.7 Audio Circuitry
- 9.8 AM Audio Processor Factory Configuration
- 9.9 AM Audio Processor Alignment
- 9.10 AM Audio Processor Electrical Parts List
- 9.11 AM Audio Processor Component Layout
- 9.12 AM Audio Processor Schematic Diagram
- 10 REVISION HISTORY
- VHF AMPLIFIER
- 1GENERAL
- 2THEORY OF OPERATION
- 3VT-3/150 AMPLIFIER ALIGNMENT
- 3.1General
- 3.2Repair Note
- 3.3Recommended Test Equipment List
- 3.4Printed Circuitboard Numbering Convention
- 3.5Standard Factory Settings and Jumper Configuration
- 3.6VT-3/150 Amplifier Alignment
- 3.6.1General
- 3.6.2VT-3/150 Amplifier Adjustment
- 3.6.2.1General Set-Up
- 3.6.2.2Output Power Alarm (Forward Power)
- 3.6.2.3Output Power
- 3.6.2.4Antenna VSWR Alarm (Reverse Power)
- 3.6.2.5Antenna VSWR Overload
- 3.6.2.6Procedure Verification
- 4ILLUSTRATIONS AND SCHEMATIC DIAGRAMS
- 5PARTS LISTS
- 6REVISION HISTORY
- ENHANCED AM/FM SYNTHESIZER
- 1. GENERAL
- 2. THEORY OF OPERATION
- 2.1 Internal Power and Control (Digital Board)
- 2.2 Synthesizer Analog Circuitry (Analog Board)
- 2.2.1 Common Analog Board Circuitry
- 2.2.2 29 - 71.4 MHz Analog Board Circuitry
- 2.2.3 118 - 159.4 MHz Multichannel AM Analog Board Circuitry
- 2.2.4 128 - 174 MHz Analog Board Circuitry
- 2.2.5 406 - 470 MHz Analog Board Circuitry
- 2.3 Synthesizer Digital Circuitry (Digital Board)
- 2.4 Frequency Control
- 2.4.1 BCD Switch Frequency Control
- 2.4.2 Frequency Select Handle Frequency Control
- 2.5 Synthesizer Base and Frequency Increment Table
- 2.6 5.0/6.25 kHz Channelization.
- 2.7 8.333 kHz Channelization.
- 2.8 12.5 kHz Channelization.
- 3. SYNTHESIZER ALIGNMENT
- 3.1 General
- 3.2 Repair Note
- 3.3 Recommended Test Equipment
- 3.4 OS(R/T)-3(A/H) Synthesizer Factory Configuration
- 3.5 OS(R/T)-3(A/H) Synthesizer Alignment
- 3.5.1 General
- 3.5.2 Synthesizer Test Points
- 3.5.3 Synthesizer Removal and Installation
- 3.5.4 Circuit Board Removal
- 3.5.5 Frequency Adjustment and Channel Selection
- 3.5.5.1 VHF OS(R/T)-3H 29 - 71.4 MHz VCO Alignment
- 3.5.5.2 VHF OS(R/T)-3A 118 - 159.4 MHz Alignment
- 3.5.5.3 VHF OS(R/T)-3H 128 - 174 MHz VCO Alignment
- 3.5.5.4 UHF OS(R/T)-3H 406 - 470 MHz VCO Alignment
- 3.5.5.5 Reference Frequency Alignment
- 3.5.6 Jumper Configuration
- 4. ILLUSTRATIONS AND SCHEMATIC DIAGRAMS
- 4.1 OS(R/T)-3H 29 - 71.4 MHz Analog Board Diagrams
- 4.1.1 OS(R/T)-3H 29 - 71.4 MHz Analog Board Component Layout (Bottom)
- 4.1.2 OS(R/T)-3H 29 - 71.4 MHz Analog Board Component Layout (Top)
- 4.1.3 OS(R/T)-3H 29 - 71.4 MHz Analog Board Schematic Diagram
- 4.2 OS(R/T)-3A 118 - 159.4 MHz Analog Board Diagrams
- 4.2.1 OS(R/T)-3A 118 - 159.4 MHz Analog Board Component Layout (Bottom)
- 4.2.2 OS(R/T)-3A 118 - 159.4 MHz Analog Board Component Layout (Top)
- 4.2.3 OS(R/T)-3A 118 - 159.4 MHz Analog Board Schematic Diagram
- 4.3 OS(R/T)-3H 128 - 174 MHz Analog Board Diagrams
- 4.3.1 OS(R/T)-3H 128 - 174 MHz Analog Board Component Layout (Bottom)
- 4.3.2 OS(R/T)-3H 128 - 174 MHz Analog Board Component Layout (Top)
- 4.3.3 OS(R/T)-3H 128 - 174 MHz Analog Board Schematic Diagram
- 4.4 OS(R/T)-3H 406 - 470 MHz Analog Board Diagrams
- 4.4.1 OS(R/T)-3H 406 - 470 MHz Analog Board Component Layout (Bottom)
- 4.4.2 OS(R/T)-3H 406 - 470 MHz Analog Board Component Layout (Top)
- 4.4.3 OS(R/T)-3H 406 - 470 MHz Analog Board Schematic Diagram
- 4.5 OS(R/T)-3(A/H) Digital Board Diagrams
- 4.5.1 OS(R/T)-3(A/H) Digital Board Component Layout (Bottom)
- 4.5.2 OS(R/T)-3(A/H) Digital Board Component Layout (Top)
- 4.5.3 OS(R/T)-3(A/H) Digital Board Schematic Diagram
- 5. PARTS LISTS
- 5.1 OS(R/T)-3H 29 - 71.4 MHz Analog Board Electrical Parts List
- 5.2 OS(R/T)-3A 118 - 159.4 MHz Analog Board Electrical Parts List
- 5.3 OS(R/T)-3H 128 - 174 MHz Analog Board Electrical Parts List
- 5.4 OS(R/T)-3H 406 - 470 MHz Analog Board Electrical Parts List
- 5.5 OS(R/T)-3(A/H) Digital Board Electrical Parts List
- 5.6 OS(R/T)-3(A/H) Synthesizer Mechanical Parts List
- 6. REVISION HISTORY
- VHF CHANNEL DESIGNATION TABLES
DESIGNATION
OST-3H035
TX 29 - 40 MHz
C23
TRANSMITTER
OST-3H045
TX 39 - 50 MHz
OSR-3H061
TX 50.4 - 71.4 MHz
RECEIVER
L5
C61
C48
C53
C58
C59
L11
C34
C57
L13
150 pF
260 nH *
150 pF
68nF *
56 pF
33 pF
33 pF
56 pF
15pF
56 pF
138 nH *
56 pF
Not Installed
68 pF
100 pF
120 nH
33 pF
120nH
Not Installed
68 pF
100 pF
47 pF
68nF *
56 pF
15pF
33 pF
33 pF
100 pF
100 nH
100 nH
197 nH *
R22 475R 475R Not Installed
* Thru Hole Component
100 nH
100 nH
R29
U10
18k2
MC145191 or
MC145192
3k92
MC145193
3k92
MC145193
VICTORIA B.C.
DE
DANIELS
ELECTRONICS
DE
DANIELS
ELECTRONICS
DWG REV DATE: 26 MAY 00
TP4 LOOP CONTROL
SET FOR ≈ 2.3 VDC
DWG No: OS3050M3B
BOARD No: 50038-02
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TITLE: OS(R/T)-3H 29 - 71.4 MHz ANALOG BOARD SCHEMATIC DIAGRAM
Enhanced AM/FM Synthesizer Instruction Manual OS(R/T)-3(A/H) 29 - 470 MHz
4-3
-----
-----
U12 - U14
L13
BOARD REV: 1
DATE: 24 FEB 97 DWN BY: COLIN GUNN
LED1
C64
-----
-----
R42, R43R37
A
B
U16TCXO1RV1
R56Q5
D5
APRVD:
----- -----
UNUSED REFERENCE DESIGNATORS
HIGHEST REFERENCE DESIGNATORS
RF OUTPUT
3.5 dB Pad
LOCK DETECT
OUTPUT
ACTIVATED WHEN
UNLOCKED
NC
NC
NC
MODULATION INPUT
POWER CNTRL
ID≈10 mA
LOCK DETECT
DATA INPUT
CLK
ENABLE
ACTIVE HIGH
TO ALL +8VA SUPPLY POINTS
EXTERNAL REFERENCE
INPUT (50Ω)
FREQ CONTROL
TCXO MOD INPUT
+9.5 VDC SUPPLY
TO ALL +5VA SUPPLY POINTS
NC
NC
REFOUT
LD
øR
øV
VPD
PDOUT
GND
RX
TEST 1
FIN
REFIN
DIN
CLK
ENB
OUTPUTA
OUTPUTB
VDD
TEST 2
VCC
FIN
1
2
3
4
5
6
7
8
9
1011
12
13
14
15
16
17
18
19
20
SEL
U10
AGND
AGND
GND
VCNTRL
OUTPUT
VCC
1
4
2
3
TCXO1
9.6 MHz
AGND
C31
1.0nF
R29
SEL
OUTPUT
SENSE
5VTAP
FB
INPUT
ERROR
SHDN
GND
1
2
6
74
3
5
8
U8
LP2951
AGND
+
C15
4.7uF
AGND
R15
10R0
+
C18
47uF
AGND
R16
5K11
R17
5K11
AGND
RV1
5K0
AGND
C16
1.0nF
+
C6
47uF
AGND
AGND
C7
10nF
R19
10K0
C14
10nF
AGND
2
1
3
JU1
C19
10nF
+5VA
Z2
AGND
C22
10nF
AGND
C21
10nF
R23
10R0
R24
10R0
+
C27
4.7uF
AGND
+
C20
4.7uF
AGND
+5VA
+5VA
R31
49R9
AGND
+
C32
100uF
AGND
R30
10R0
C36
330pF
AGND
IN
OUT
GND
1 3
4 2
U11
MSA-0611
R40
180R
L8
1.5uH
+
C42
22uF
AGND
C43
10nF
AGND
+8VA
C44
330pF
R41
18R2
R44
47R5
R47
47R5
R46
33R2
AGND
C46
330pF
AGND
IN
OUT
GND
1 3
4 2
U15
MSA-0611
R50
180R
L9
1.5uH
+
C50
22uF
AGND
C51
10nF
AGND
+8VA
C52
330pF
R45
27R4
C47
330pF
AGND
IN
OUT
GND
1 3
4 2
U16
MSA-0611
R51
220R
L10
1.5uH
+
C54
22uF
AGND
C55
10nF
AGND
+8VA
C56
330pF
R48
27R4
R49
33R2
AGND
R52
49R9
AGND
R55
274
AGND
R54
18R2
R56
274
AGND
J2
AGND
2
1
3
D2
MMBV609L
2
1
3
D1
MMBV609L
L4
10uH
R20
10R0
AGND
R25
10R0
L6
10uH
C25
1.0nF
AGND
C23
SEL
L2
10uH
AGND
C2
1.0nF
P2
OUTPUT
SENSE
5VTAP
FB
INPUT
ERROR
SHDN
GND
1
2
6
74
3
5
8
U7
LP2951
AGND
+
C13
4.7uF
AGND
L3
10uH
AGND
C3
1.0nF
P3
E
B
C
Q2
BC817
J1
R7
10K0
R6
1K00
R9
1K00
AGND
AGND
C4
10nF
C9
10nF
AGND
R1
49R9
AGND
R5
100R
C8
100nF
AGND
+5VA
VCC
OUT
GND
1
2
3
U1
OPL550
VCC
OUT
GND
1
2
3
U2
OPL550
VCC
OUT
GND
1
2
3
U3
OPL550
VCC
OUT
GND
1
2
3
U4
OPL550
AGND
AGND
AGND
+5VA
C10
100nF
AGND
OUTB
OUTA
ENB
CLK
DIN
AGND
AGND
R13
11K8
R14
10K0
AGND
+
C12
4.7uF
AGND
+8VA
AGND
+5VB
C5
100nF
AGND
+5VB
TP1
TP2
TP3
E
B
C
Q1
BC817
AGND
R4
10K0 R3
10K0
OUTPUT
ADJ
GND
NC
VIN
GND
GND
SHDN
8
7
6
5 4
3
2
1
LT1129-IS8
U6
+
C33
100uF
AGND
D4
BYD17JR26
1R2
AGND
E
B
C
Q4
BC817
R11
10K0
AGND
R18
10K0
+5VA
ENB
CLK
1
2
OP140A
U5
R12
10K0
AGND
AGND
E
B
C
BC807
Q3
R10
10K0
R2
330R
C37
1.0uF
AGND
+8VA
R28
N/I
+
C29
47uF
AGND
AGND
C30
10nF
OUTB
10uH
L1
AGND
1.0nF
C1
P1
AGND
R22
1K00
AGND
20K0
R21
1.0nF
C26
D1
D1
D2
D2
S1
G1
S2
G2
1
2
3
4 5
6
7
8
SI9945DY
U9
AGND
0R00
R39
R8
10K0
10K0
R34
10K0
R35
+5VA
+5VA
AGND
+
1.0uF
C11
BAS16
D5
10K0
R53
TP4
C38
1.0uF
AGND
AGND
DIN
LED1
LTL-93BEK1
AGND
R33
680R
G
SD
Q5
J211
L7
4.7uH
R27
15K0
D3
MMBD701
C40
33pF
C34
SEL
R38
49R9
C28
1.0nF
+8VA
C41
1.0nF
L5
SEL
C24
1-14pF
JU2
SEL
C61
C59
SEL
C53
SEL
L11
SEL
C58
SEL
AGND
AGND
SEL
C48
AGND
AGND
AGND
AGND
AGND
AGND
AGND
AGND
AGND
JU3 JU4
SEL
L13
SEL
C57
AGND
C17
1nF
C62
47pF
C63
22pF
C64
12pF
R32
15K0
1.0uF
C39
2K7
R36
C45
470nF
C49
22nF
L12
4.7uH
C35
3.3pF
+5VA