1. Product Outline
The SR-FRS-1W350 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 with 1W output . In open area, it can come to performance of 5Km communication. 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 100 byte can be sent at one time; it is compliance with the standard UART transfer protocol;
2. Product performance
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FM demodulation technique Based on digital signal processing technology；
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Frequency Range：UHF 350M～390MHZ；
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Frequency step：5K/6.25K/12.5K/25K；
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RF Output Power： 1W
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voice encryption (scrambling): 8 type.
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Voice Compression- Expansion ；
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SMS Receive /Transformer，The space Baut : 1200；
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CTCSS（38 group）+ CDCSS（83 group） ；
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Automatic elimination tail ；
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Volume adjustable（1-9）；
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Vox level adjustable（0-8）；
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SQ level adjustable（0-9）；
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MIC sensitivity level adjustable（1-8）
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The ultra low power dissipation in Sleep Mode（0.1uA）;
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Power supply ：DC 3.3～5.0V
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Ultra small size：18 * 35 * 3.2MM；
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Communication distance：more than 5 KM 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
3. Module pin assignment
|
J1 pin name
|
Pin number
|
Function description
|
|
SQ
|
1
|
Squelch control
0: active
|
|
VOX_DET
|
2
|
1） with VOX mode，it is the VOX state indication；
0： Talk finished；
1： Talking；
2） without VOX，it is the transmitter state indication；
0： receive state
1： transmitter state
|
|
AF_OUT
|
3
|
Audio output
|
|
MIC1(NC)
|
4
|
NC
|
|
PTT
|
5
|
PTT control
1：Receive；
0：Transmit
|
|
PD
|
6
|
Sleep control，
0： into sleep state
1： Running
|
|
H/L
|
7
|
NC.
|
|
BAT
|
8
|
Power supply: DC 3.3V - 5V
|
|
GND
|
9
|
GND
|
|
GND
|
10
|
GND
|
|
NC
|
11
|
NC
|
|
ANT
|
12
|
Rf Antenna input;
|
|
NC
|
13
|
NC
|
|
NC
|
14
|
NC
|
|
NC
|
15
|
NC
|
|
RXD
|
16
|
UART - Rxd
|
|
TXD
|
17
|
UART - Txd
|
|
MIC_IN
|
18
|
Microphone input;
|
