Codan Radio Communications VT-3-150-SN User Manual
DANIELS
ELE CTRONICS LTD.
TM
Low Frequency Modulation Configuration
Desig
Low Freq.
JU27X
JU27Y
JU27Y
JU31
JU35X
Not Installed
Not Installed
Not Installed
Not Installed
Not Installed
Not Installed
Not Installed
JU35Y
JU37
JU38X
JU38Y
JU38Y
Installed
Not Installed
Not Installed
Not Installed
Installed
Desig
Low Freq.
T
VICTORIA B.C.
DE
DANIELS
ELECTRONICS
T
5-9
Transmitter Main Board Instruction Manual
5.4.2 Audio Processor Schematic Diagram V1.6
DWG REV DATE: 28 NOVEMBER 1997
DWG No: MT3APM2C
Not Installed if TOT circuitry installed
in Tx Main PCB 43-920917
in Tx Main PCB 43-920917
NOTE: 400 MHz CTCSS Subtones from an Enhanced
Synthesizer are routed by installing jumpers JU35Y
(remove JU35X), JU36Y (remove JU36X) and JU37.
Synthesizer are routed by installing jumpers JU35Y
(remove JU35X), JU36Y (remove JU36X) and JU37.
NOTE: For Low Frequency Modulation, short pins P4-1
and P4-3 together.
and P4-3 together.
JU39
JU20-JU22
R76
U6-U7
R90
TP2
J4
U10
P8
R53-R60
Q1
Q2
C58
C1,C2
FB1
-----
-----
-----
UNUSED REFERENCE DESIGNATORS
HIGHEST REFERENCE DESIGNATORS
LOW FREQUENCY / DIRECT
MODULATION OUTPUT
MODULATION OUTPUT
X
Y
high = voice
low = data
low = data
BOARD REV: VERSION 1.6
BOARD No: 43-911916
DEVIATION
CONTROL
CONTROL
Y
X
Y
X
Y
X
Y
X
Y
X
Y
X
Y
X
Y
X
Y
X
Y
X
Y
X
Y
X
+
+
+
+
+
+
+
DIRECT
MODULATION
INPUT
MODULATION
INPUT
APRVD:
DWN BY: MICHAEL GAUBE
DATE: 19 SEPTEMBER 1991
TITLE: MT-3 TX AUDIO PROCESSOR SCHEMATIC DIAGRAM
+
MODULATION
OUTPUT
OUTPUT
BALANCED INPUT
MICROPHONE INPUT
LEVEL CONTROL
LEVEL CONTROL
6 POLE BUTTERWORTH FILTER
BALANCED
COMPRESSION
CONTROL
COMPRESSION
CONTROL
+
PRE-EMPHASIS
FLAT AUDIO
+
+
+
PRE-EMPHASIS
FLAT AUDIO
MICROPHONE
AGC PREAMP
AGC PREAMP
MICROPHONE
COMPRESSION
CONTROL
COMPRESSION
CONTROL
SYMMETRY
ADJUST
ADJUST
BALANCED
AGC PREAMP
AGC PREAMP
BALANCED
INPUT LEVEL
CONTROL
INPUT LEVEL
CONTROL
AUXILIARY INPUT
604R
R1
100nF
C4
10nF
C5
10nF
C6
6k81
R3
10nF
C7
47uF
C8
221k
R4
3
4
5
1
6
2
7
8
SL6270
U1
2.2uF
C10
100nF
C9
1k00
R6
150pF
C11
1k00
R5
20k0
R7
680nF
C12
221k
R9
10pF
C13
4.7nF
C16
100k
R16
150pF
C19
10nF
C17
49k9
R15
100nF
C28
4.7uF
C29
1k50
R32
47uF
C31
221k
R34
3
4
5
1
6
2
7
8
SL6270
U2
5k
R31
681R
R30
4.7uF
C30
1k50
R33
6.8µF
C33
4.7nF
C32
1k00
R36
150pF
C34
1k00
R35
330nF
C35
100k
R38
20k0
R37
10pF
C36
1k50
R40
4.7nF
C37
11k8
R41
50k
R29
221k
R50
27k4
R49
150nF
C41
1k50
R51
4.7nF
C43
22nF
C23
3k48
R26
3k48
R25
10nF
C24
15nF
C25
13k3
R28
13k3
R27
1.0nF
C26
FB1
100nF
C14
11k8
R52
2k21
R20
49k9
R13
330nF
C39
1.0uF
C40
11k8
R43
5k
R42
5k
R44
100nF
C20
49k9
R11
100k
R8
33nF
C27
330nF
C38
330nF
C44
100k
R48
4k53
R46
49k9
R21
49k9
R22
4k53
R17
681R
R18
68k1
R80
221k
R39
10k
R81
10nF
C21
5k11
R24
5k11
R23
10nF
C22
100nF
C18
300R
R19
R12
11k8
11k8
10nF
C15
27k4
R82
27k4
R83
22k1
R86
1.0uF
C47
JU3
JU4
JU5
JU12
JU2
JU9
JU10
JU14
JU15
JU7
JU8
JU32
JU33
+8.0V_SWD
+8.0V_SWD
+8.0V_SWD
+8.0V_SWD
+9.5V_CONTINUOUS
39k2
R84
JU24
JU25
JU26
JU27
JU29
JU28
39k2
R85
100k
R89
22k1
R87
49k9
R78
49k9
R79
Q2
BC817-25
100k
R88
4.7uF
C50
100nF
C51
27k4
R74
10nF
C49
JU1
+8.0V_SWD
JU31
JU11
JU13
20k0
R77
4.7uF
C3
4.7uF
C52
4.7uF
C54
10nF
C53
4.7uF
C55
3
2
8
4
1
MC33172
U3a
5
6
7
MC33172
U3b
5
6
7
U8b
MC33172
5
6
7
MC33172
U4b
4.7uF
C56
1.0uF
C48
221k
R73
63k4
R71
JU30
JU23
JU39
JU38
150pF
C58
JU16
JU36
2
3
8
4
1
MC33172
U8a
2
3
8
4
1
U4
MC33172
MC33172
a
2
3
4
11
1
MC33174
U5a
5
6
7
U5
MC33174
b
10
9
8
c
MC33174
U5
12
13
14
U5
MC33174
d
JU35
JU34
39k2
R45
JU37
1.0uF
C57
39k2
R72
221k
R61
3
P1
2
P1
1
P1
4
P1
3
P3
3
P2
4
P2
1
P2
1
P4
3
P4
2
P2
1
P3
2
P4
4
P4
TP1
TP2
4k53
R47
1
2
3
50k
R14
5k
R2
50k
R75
1
J2
1
J4
1
J3
1
J1
1
P8
1
P7
1
P6
1
P5
4
P3
2
P3
1
2
3
4
5
TC4S66F
U9
MT-3 TX TIME-OUT-TIMER
10k
R90
JU6
JU19
1
2
3
4
5
TC4S66F
U10
JU17
JU18
1
P9
1
P10
1
P11
1
P13
1
P12
+8.0V_SWD
+9.5V_CONTINUOUS
+8.0V_SWD
1
P15
1
P14
49k9
R10
+8.0V_SWD
MICROPHONE INPUT
TO_PIN_3_OF_U4
SUBTONE INPUT 1
TONE/DIGITAL I/P
V offset
V offset
Tx Audio Control
SUBTONE INPUT 2
TO_PIN_3_OF_U3