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Function

Pin 1

Audio

in(Data

TX)

Pin 2

Audio out (Data

RX )

Pin 3

PTT

Pin 4

GND

Pin 5

B+

Pin 6

Pin 7

RSSI

Pin 8

Switch

Pin 9

Speaker

When Pin 8 is connected to GND(0V), the radio is in program mode. The

parameters of the radio can be changed in this mode. When Pin 8 is connected

to 5V voltage, the radio works normally in transmission or receiving status.

Type

Range

Input

200VP-P

300VP-P

150mV-250mV

Output

Input

V/+5V

GND

V+

10-15V

Output

Open/Short

Output

0.8V-2.2V

Input

0V/5V

Output

8ohm /0.5W

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Description

------

External Modulation Input

Demodulation Output

Transmit Enable

0V - Radio in Transmit status

status(Default )

GND

Power Supply(+12.5V typical )

RF Carrier Detect

Open -- low level,

Short -- high level (Default).

Programming Enable

0V - Radio programmable

5V - Radio work (Default )

Radio

receive