SR_FRS_4WV

               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 Range：VHF 136M～174MHZ；

•   Frequency step：5K/6.25K/12.5K/25K；

•   RF Output Power： 4W/1W

•   voice encryption (scrambling): 8 type.

•   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

4. Module Pin assignment

4.1  Module connector

 HRSFH34SRJ0.5

4.2 Module pin function define

5. Typical application Block diagram