FRS_DEMO_A

Walkie Talkie Transceiver /Data transfer Module Demo Board specification

( For SR_FRS_1WV VHF only)

What you get:

• The cost is just for 1 pcs;
• The demo board with one antenna, but without speaker and battery; speaker(1w/8ohm); Battery voltage is around 4V/1.5A, Li_ion battery is recommend.
• We provide the technical support for both hardware and software. We can provide the demo code for your reference.

Specification for DEMO_A:

The demo board can be used for these module evaluation as below:

• SR-FRS-1WU: 1W/400M-480M
• SR-FRS-1WV: 1W/136M-174M
• SR-FRS-1W350: 1W/350M-390M
• SR-FRS-2WU: 2W/400M-480M
• SR-FRS-0W5U: 0.5W/400M-480M

DMR digital module：

• SR-DMR-2WU: 2W/400M-480M

Please select the right demo board based on the module you used.

It is a full function Walkie Talkie Transceiver system. Only DC 5V power supply is needed. You may evaluate the voice talking and data transferring by the demo board. You needn’t waste your time in search the components and sealing. It is convenient for you to evaluate our module quickly, and it is also effective for you to expedite the development.

The feature of the demo board:

• Voice talk demo；

• Data transfer demo；

• We leave a group interface for customer development

About the operation of demo board:

• Plug the speaker to the white outlet；

• Fix the antenna to the demo board；

• Connect the DC power supply (or Battery) to the demo board，please pay attention to the power polarity；The DC power voltage could be 3.3V-5V, the recommend DC power is 4.0V; The current capacity should be double of the transmit current.

• After connect the power supply correctly, the power Led would turn on.

• When press the PTT key，The red LED for transfer state indication would turn on; Now you may talk； Release the PTT Key , Red LED would turn off，it into the receive state，you may receive the talking from opposite side.

How to set the parameter of the module:

• The setting command please refer 《serial communication protocol》，You may ask it from our company；
• Please connect the demo board TXD,RXD , GND with the USB TO UART board

Comment:

We leave two UART interface for user:

• One is RS232 level, please add the MAX232 yourself;
• One is TTL level (3.0V), the sample is for TTL level.

Send uart command via the UART tools to set the parameter of the module.

Comment:

• The Tx Frequency and Rx Frequency can be set alone.

• The Tx CTCSS and Rx CTCSS can be set alone.

• The parameter can’t be kept because of this demo board without MCU.

NOTES:

• For more detail specification, please contact us.

• The demo board is subject to be upgraded without notice!