SR_DEMO_A Walkie Talkie Transceiver /Data transfer Module

Demo Board specification ( for 1W350 module)

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, more than it, we can provide the demo code for your reference.

Outline:

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 use.

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 accessories of this demo board are as below：

• One antenna;
• We don’t provide the battery and the speaker, because it can’t be shipped.

We will provide you the technical support for both hardware and software , more than it, we can provide you the demo code for your reference;

The features of the demo board:

• Voice intercom demo；

• Data transfer demo；

• We leave a group interface for customer development

About voice intercom demo:

• 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；

Special comment:

• For we have two type module of analog and digital(DMR), The following spec. is just for our analog module.

• Because the DMR module has different BAUT and command, so, if you order the DMR module, please refer to the DMR spec. to operate it.

• The serial port connection Schematic diagram.

(just a sample for FRS_1WU module)

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.

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:

• The demo board is subject to change without notice.

• Please contact us for complete spec. of demo board.