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SR-FRS-4W (VHF:136MHz-174MHz and UHF: 400MHz-470MHz) Analog Walkie Talkie Transceiver /Data transfer Module

ODL22092201

SR-FRS-4W (VHF:136MHz-174MHz and UHF: 400MHz-470MHz) is a low cost but high-performance integrated walkie talkie module max power output is 4W. With built-in high performance micro controller, narrow band Rf transceiver.

Center frequency
$10.00
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Description

SR-FRS-4W (VHF:136MHz-174MHz and UHF: 400MHz-470MHz) is a low cost but high-performance integrated walkie talkie module. With built-in high performance micro controller, narrow band Rf transceiver and standard Uart interface, it can be easily used and succeed in all the walkie talkie function with good quality voice and long-distance transmission. Users only need to connect external audio amplifiers, microphone or speaker with this module, then it can work as a small walkie talkie. Simplified interface and ultra-small size make this module into a wide range of applications, also can conveniently embed into various handheld devices to improve the comprehensive performance of end products.

Besides the excellent voice intercom, the more important feature is this module has the data/SMS transfer ability; up to 80 bytes can be sent at one time; it is compliance with the standard UART transfer protocol.

Features:

FM demodulation technique Based on digital signal processing technology.

Frequency Range are VHF:136MHz-174MHz and UHF: 400MHz-470MHz:

Frequency step:5K/6.25K/12.5K/25K.

RF Output Power: 4W/1W

voice encryption (scrambling): 8 types.

Voice Compression- Expansion.

SMS Receive /Transformer,The wireless Baut: 1200.

CTCSS(38 group)+ CDCSS(83 group).

Automatic elimination tail.

Volume adjustable(1-9).

Vox level adjustable(0-8).

SQ level adjustable(0-9).

MIC sensitivity level adjustable(1-8)

The ultra-low power dissipation in Sleep Mode(0.1uA).

Power supply :DC 3.3~5.0V

Size:60 X 90 MM

Communication distance more than 7KM at open area

Applications: 

portable intercom and paging systems.

wireless data transmission.

mobile phones and other embedded in radio functions product.

Portable walkie-talkie,

Outdoor sports equipment,

Building security,

Audio monitor system 

Module connector

Module Pin assignment

Module pin function define

NAME

NO.

comment

MIC_IN

1

MIC input

NC

2

NC

VCC

3

DC powe : 3.3-5V,  recommend: 4V.

GND

4

GND

PTT

5

1: receive;    0: transmite

TXD

6

TXD for UART

RXD

7

RXD for UART

SQ

8

Squelch control

0: active

1: inactive

 

NC

9

NC

PDN

10

Module power enable

 0=SLEEP 

 1= Working;

It must be set high level when working;

AF_OUT

11

Audio output

P00

12

Program port

GND

13

 GND

H/L

14

RF Power select:

NC: 4W 

0:  1W

It do not be connected  to a high level.

P01

15

 Program port

GND

16

GND

                                            

Typical application Block diagram

sr-frs-4wv Module Pin assignment

Product Details
ODL22092201
300 Items
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SR-FRS-4W (VHF:136MHz-174MHz and UHF: 400MHz-470MHz) Analog Walkie Talkie Transceiver /Data transfer Module

SR-FRS-4W (VHF:136MHz-174MHz and UHF: 400MHz-470MHz) is a low cost but high-performance integrated walkie talkie module max power output is 4W. With built-in high performance micro controller, narrow band Rf transceiver.

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