Codan Radio Communications UT-4-400 User Manual

+9.5VDC

+9.5V OUTPUT

MIC PTT

MIC AUDIO

 FRONT PANEL 

RX 

AUDIO 

BALANCED INPUT
SIDE 1

BALANCED INPUT
SIDE 2

DIGITAL SIGNAL

PROCESSOR BOARD

NORM

KEY TX

SW1

KEY TX

Z18

P1

EXT MIC

+9.5 VDC

Z6

B6

R

FRONT PANEL
N CONNECTO

RF IN

RF OUT

+9.5V

+13.8V

AMPLIFIER MODULE 

TRANSCEIVER RF BOARD

RF OUT

OR

B18

P1

B18

P1

PTT WTO

DIGITAL LED

ANALOG LED

JU34

JU35

DIGITAL COR

ANALOG COR

LH_DATA

SB9600_BUSY

SB9600_BUSY

LH_DATA

DIGITAL COR INPUT

ANALOG COR INPUT

B12

P1

Z12

P1

JU37

MIC_PTT

PTT OUT

JU42

JU41

MODULATION SIGNAL 

MODULATION SIGNAL

____
ENA

B24

P1

PTT OUT

ANALOG LED

DIGITAL LED

+9.5 VDC

J7

+13.8 VDC

SW2

A/D MIC
MODE

ANALOG / DIGITAL MIC MODE

+13.8 VDC 

Z2

B2

TO ALL +13.8 V SUPPLY POINTS

MIC CONNECTOR

RJ45 CONNECTOR

J3

BANK A/B

MICROPROCESSOR

AUDIO SUMMING 
AMPLIFIER

BANK A/B*

CSEL0

CSEL1

CSEL2

P1

D22

D20

P1

D24

P1

BANK SELECT OUT

CSEL3

BEEP AUDIO

BANK SELECT IN

JU44

JU43

JU45

JU46

JU48

JU47

JU49

JU50

JU2

JU4

604R

JU19

JU12

JU14

JU17

HANG 

TIME
AND 

KERCHUNK

 SELECT

JUMPERS

JU13

GROUND

POWER TO RPIM

JU18

8.9 VDC

D26

P1

A0

A1

A2

A3

POWER

PTT IN

PTT

Project 25 Digital Repeater Transmitter Instruction Manual

5-3

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