SR-FRS-1WV 136MHz-174MHz 1W VHF Analog walkie talkie module

Product Outline

The SR-FRS-1WV  (VHF) 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 with 1W output. 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 have the data transfer ability there are 2 modes: the data/SMS transfer ability; up to 100 byte can be sent at one time; it is compliance with the standard UART transfer protocol. DTMF transfer, 0-9,A-F, total 16 digits can be sent.

Product performance:

• FM demodulation technique based on digital signal processing technology
• Frequency Range：VHF 136M-174M
• Frequency step：5K/6.25K/12.5K/25K
• RF Output Power：1W/0.5W
• 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
• Ultra small size：18 x 35 x 3.2 mm
• Communication distance：more than 3KM in 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 pin assignment

Typical application Block diagram    

 See the pictures.