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SR120V-VHF 136MHz-174MHz wireless voice and data transmission module

DWM23082802

SR120UV-VHF is a enhance version of the SR-FRS-2WV is wireless voice and data transmission walkie talkie module which built-in with a high performance radio frequency transceiver chip, microcontroller and radio frequency power amplifier.

$8.00
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Description

SR120V-VHF(SR_FRS_2WV) is a wireless voice intercom and data transmission module with extremely high cost performance. It integrates a high-performance RF transceiver chip, microcontroller, and RF power amplifier. The external controller can set the working parameters of the module and control the transmission and reception of the entire module through a standard asynchronous serial interface (RS232). This module only needs to be connected to an antenna, microphone and audio power amplifier to form a complete walkie-talkie or data transmission radio.

Features:

- Digital signal processing based frequency modulation and demodulation technology

- Frequency range: 136MHz~174MHz

- Selectable frequency stepping: 5K/6.25K/12.5K/25K 

- 3 selectable RF output power: High power 2W, Medium power 1W, Low power 0.5W

- Voice encryption (scrambler) function: (8 options)

- Short message SMS transmission and reception

- Built-in CTCSS (38 groups) and CDCSS (83 groups) encoder/decoder

- Automatic tail elimination

- Digital volume adjustment: (1-8 levels) adjustable

- Voice control handsfree trigger sensitivity: (0-8 levels) adjustable

- Noise suppression level: (0-9 levels) adjustable

- MIC sensitivity adjustment: (1-8 levels) 

- High receiving sensitivity: -122dBm

- Ultra low power consumption (sleep mode): (0.1uA)

- Operating voltage range: 3.3V~5.0V, recommended 3.7V-4.5V

- Ultra compact size: 17*28.5*3.0mm

- Reference communication distance: 3-5 km in open area; actual distance depends on many factors.

Applications:

1. Portable walkie talkie and paging systems

2. Wireless data transmission (SMS) systems

3. New designs with embedded walkie talkie functionality in mobile phones and other products 

Module pin assignment

Pin Number  Pin Name  Function Description  Notes
1 NC Programming pin (I/O) Do not connect
2 NC Programming pin (I/O) Do not connect
3 NC Programming pin (I/O) Do not connect
4 AF Audio output
5 MIC Microphone input

6
HML RF high/medium/low power control; GND for low power 0.5W, float for high power 2W, 1.5V input for medium power 1W;
 Currently only supports 2W/0.5W software configuration
7 ANT RF input/output
8 GND GND
9 GND GND
10 VBAT Power supply positive 3.3V-5V  Recommended 3.6-4.3V
11 TX Voice control handsfree trigger indicator output, high: triggered; low: no trigger

12
RXD
Asynchronous serial interface (receive data) Note: For MCU control applications, this pin must be pulled up externally. 

If RXD is pulled low for over 50ms, it will enter production test mode.
13 PTT  Transmit/receive control pin, 1=receive, 0=transmit
14 SPK Noise suppression control output, active low
15 TXD Asynchronous serial interface (transmit data)
16 PD Module sleep enable pin, 0=SLEEP  Module can only work when connected to high level
17 +3V Module +3V output, for small external current use (<5mA)  Do not connect large load
18 GND GND

 

Typical application Block diagram    

 See the pictures.

Useful Link:

AT Command for UHF/VHF Walkie Talkie radio module

Product Details
DWM23082802
300 Items
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Reference: DWM23051301

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SA868 is a cost-effective integrated professional walkie-talkie module which include UHF band 400~480 MHz, 320-400MHz and VHF band 134~174 MHz 3 frequency bands versions built-in high-speed microcontroller, high-performance RF transceiver chip and RF power amplifier.

Price $15.00
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SR120V-VHF 136MHz-174MHz wireless voice and data transmission module

SR120UV-VHF is a enhance version of the SR-FRS-2WV is wireless voice and data transmission walkie talkie module which built-in with a high performance radio frequency transceiver chip, microcontroller and radio frequency power amplifier.

Write your review

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