SR_FRS_4WV

           SR_FRS_4WV Walkie Talkie Transceiver /Data transfer Module  VHF(136M-174M) 2. Product Outline SR-FRS-4WV(VHF) &nbs

  • Model: SR_FRS_4WV
  • Type: Analog
  • Band: VHF 136M-174M
  • Transmit Power: 3.5W
  • Receive sensivitity: -122DBM
  • Size: 60x90mm

           

               SR_FRS_4WV 

            Walkie Talkie Transceiver /Data transfer Module 

                               VHF(136M-174M)

 

2. Product Outline

 

SR-FRS-4WV(VHF)  is a low cost but high performance integrated walkit 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 byte can be sent at one time;  it  is compliance  with the standard UART transfer protocol;


3. Product performance 

  •     FM demodulation technique Based on digital signal processing technology

  •   Frequency RangeVHF 136M174MHZ

  •   Frequency step5K/6.25K/12.5K/25K

  •   RF Output Power 4W/1W

  •   voice encryption (scrambling): 8 type.

  •   Voice Compression- Expansion

  •   SMS Receive /TransformerThe wireless Baut : 1200

  •   CTCSS38 group+ CDCSS83 group

  •   Automatic elimination tail

  •   Volume adjustable1-9);

  •   Vox level adjustable0-8);

  •   SQ level adjustable0-9);

  •   MIC sensitivity level adjustable1-8

  •   The ultra low power dissipation in Sleep Mode0.1uA;

  •   Power supply DC 3.35.0V

  •     size60 X 90  MM

  •    Communication distancemore 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

 

 

 

4. Module Pin assignment

4.1  Module connector

 HRSFH34SRJ0.5

 

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4.2 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

                                            

 

5. Typical application Block diagram

 

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