8 CONNECTIONS

P1

AUDIO

 

 

 

PIN

SYMBOL

 

DESCRIPTION

1

+V

 

INPUT VOLTAGE

2

GND

 

GROUND

3

TX RADIO

 

TRANSMIT OUTPUT, SINGLE ENDED

4

TX WL

}

TRANSMIT OUTPUT, BALANCED

5

TX WL

 

6

RX RADIO

 

RECEIVE INPUT, SINGLE ENDED

7

RX WL

}

RECEIVE INPUT, BALANCED

8

RX WL

 

9

SQL

 

SQUELCH DETECTOR INPUT

10

PTT

 

PUSH TO TALK OUTPUT

P3

DIGITAL

 

 

PIN

SYMBOL

 

1

GND

CHASSIS GROUND

2

TXD

TRANSMIT DATA

3

RXD

RECEIVE DATA

4

RTS

REQUEST TO SEND

5

CTS

CLEAR TO SEND

7

SIG GND

SIGNAL GROUND

8

CD

CARRIER DETECT

B1474

BARNETT ENGINEERING LTD.

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Barnett Engineering B1474 operation manual Connections Audio, Digital