SR_FRS_2WU

SR_FRS_2WU Walkie Talkie Transceiver /Data transfer Module  UHF(400M-480M) 2. Product Outline    The SR_FRS_2WU  is a low cost but high performance integrated w

  • Model: SR_FRS_2WU
  • Type: Analog
  • Band: UHF 400M-480M
  • Transmit Power: 2W
  • Receive sensivitity: -122DBM
  • Size: 20 * 38 * 3.5MM

SR_FRS_2WU 

Walkie Talkie Transceiver /Data transfer Module  

UHF(400M-480M)

 

2. Product Outline

    The SR_FRS_2WU  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 2W output . In open area, it can come to performance of 9Km 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 70 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 RangeUHF 400M480MHZ

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

  •   RF Output Power 2W/1W

  •   voice encryption (scrambling): 8 type.

  •   Voice Compression- Expansion

  •   SMS Receive /TransformerThe space 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

  •   Ultra small size20 * 38 * 3.5MM

  •   Communication distancemore than 3-5 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

 4. Module package

 4.1 Module pin assignment for TOP VIEW.

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                   Top  view

 

4.2  Module  package size

 

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4.3 Module pin assignment description

Pin number

pin name

IO

Function description

1

BAT

-

Power supply: DC 3.3V -  5V

2

GND

-

GND

3

H/L

IN

RF transmit power selection

0 1W;

NC 2W;

Note: if you want a 2w power ,just leave this pin NC, it can’t be pull high.

4

PD

IN

Sleep control

0 into sleep state

1 Running

 

5

AF_OUT

OUT

Audio output

6

TXLED

/VOX

OUT

1)  with VOX modeit is the VOX state indication

0 Talk finished

1 Talking

2)  without VOXit is the transmitter state indication

0 receive state

1 transmitter state

7

SQ

OUT

Squelch control

0: active

8

PTT

IN

PTT control

1Receive

0Transmit

9

MIC_IN

IN

Microphone input;

 

10

TXD

OUT

UART - Txd

11

RXD

IN

UART - Rxd

12

GND

-

GND

13

GND

-

NC

14

GND

-

NC

15

GND

-

NC

16

ANT

IN/OUT

Rf Antenna input;

17

GND

-

NC

 

 5. Typical application Block diagram

 

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