Codan Radio Communications VT-3-150-SN User Manual
LED ENA
X
X
X
Y
Y
Y
Y
X
X
Y
B20
J16
RELAY1
J2
12
13
11
U2d
U2c
D32
D20
+9.5VDC
+9.5 VDC
2
1
3
U2a
J17
JP1-2
+9.5 VDC
Z20
B4
Z4
B22
Z18
B18
Z24
Z28
B12
Z12
B10
Z10
B14
Z14
B24
D12
D2
B8
Z8
D8
D10
J1
D30
D28
D22
D24
D26
Z22
B26
Z26
Z30
Z32
B30
D6
D4
Y
X
J4
X
Y
+9.5V
+9.5V OUTPUT
GROUND
MIC PTT WTO
MIC PTT NTO
MIC AUDIO
MT-3 FRONT PANEL BOARD
RX AUDIO / +13.8V
B2
Z2
+13.8VDC
B6
Z6
RF OUT
REFERENCE
INPUT
OS-3 SYNTHESIZER MODULE
R
FRONT PANEL
N CONNECTO
N CONNECTO
RF IN
RF OUT
+9.5V
+13.8V
FOR
REV
ENA
MT-3 VHF/UHF AMPLIFIER MODULE
OR
LED ENA
+9.5VDC
PTT TRIGGER
PTT WTO
TRIGGER
TRIGGER
+9.5VDC
SWITCHING
CIRCUITRY
CIRCUITRY
+9.5VDC
VSWR REVERSE
FORWARD POWER FAIL
INDICATOR
INDICATOR
10-17 VOLTS
+ 13.8 VDC NOMINAL
+ 13.8 VDC NOMINAL
BACKPLANE
CONNECTOR
CONNECTOR
GROUND
GROUND
GROUND
GROUND
RX DATA IN
TX DATA OUT
BOOTSTRAP
CHANNEL SEL 0 (LSB)
CHANNEL SEL 1
CHANNEL SEL 2
CHANNEL SEL 3 (MSB)
TX AUDIO CONTROL
+9.5 VDC PTT SWITCHED
J12
R25
27K4
27K4
R26
1K0
1K0
Q10
PZT2222A
PZT2222A
J14
J15
J13
FUSE
(OPTIONAL)
(OPTIONAL)
+9.5 VDC CONTINUOUS
J9
SQL DE-EMP INPUT
MIC OUT
MIC IN
BALANCED INPUT
SIDE 2
SIDE 2
600 OHMS
BALANCED INPUT
SIDE 1
SIDE 1
SUBTONE
INPUT #1
INPUT #1
SUBTONE
INPUT #2
INPUT #2
SQL FLAT
INPUT
INPUT
DIRECT MOD
INPUT
INPUT
PTT WTO
TX
STANDBY
STANDBY
NO2
COMMON 2
NC2
RLY POS
RLY NEG
NC 2
NC 1
COMMON 1
PTT NTO
PTT OUTPUT
PTT OUTPUT
TX STANDBY
PTT
+ 9.5 VDC PTT SWITCHED
+ 9.5 VDC SWITCHED
J3
Y
X
J7
+ 9.5 VDC PTT
SWITCHED
SWITCHED
+ 9.5 VDC
SWITCHED
SWITCHED
8
10
9
1
7
9
8
10
4
2
3
0 1
2
3
4
5
6
7
8
8
9
0 1
2
3
4
5
6
7
8
8
9
0 1
2
3
4
5
6
7
8
8
9
0 1
2
3
4
5
6
7
8
8
9
MSB
LSB
T1
600
Ω
PTT
Y
X
J18
+ 9.5 VDC PTT
SWITCHED
SWITCHED
+ 9.5 VDC
SWITCHED
SWITCHED
PTT OUTPUT
8 VDC
SUPPLY
+9.5 VDC
Y
X
Y
X
Y
X
Y
X
J20
J22
J23
J19
AUDIO OUTPUT
SUBTONE #2 OUTPUT
MICROPHONE
INPUT
INPUT
BALANCED INPUT
+9.5V
+8.0V SWITCHED
TONE/DIGITAL INPUT
SUBTONE #1 INPUT
SUBTONE #2 INPUT
DIRECT MODULATION INPUT
GND
MT-3 AUDIO
PROCESSOR
PROCESSOR
AUDIO CONTROL
AM(N/C)
AM(N/C)
AM(N/C)
AM(N/C)
AM(N/C)
AM(N/C)
TOT INPUT
TOT OUTPUT
J35
J33
TOT INPUT
TOT OUTPUT
TIME OUT TIMER
Y
X
J25
JP1-7
B32
ELECTRONICS LTD.
DANIELS
TM
MT-3 AM Transmitter Main Board Instruction Manual
5 ILLUSTRATIONS AND SCHEMATIC DIAGRAMS
5.1 Transmitter Block Diagram
5.1 Transmitter Block Diagram
5-1
MT3TXMNM1D