SR_DEMO_B 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.

Specification for demo_B

FRS-DEMO-B is designed for Walkie Talkie transceiver module demo as below:

• SR_FRS_0W5U: 0.5W/400M-480M
• SR-FRS-1W350: 1W/350M-390M
• SR-FRS-1WU: 1W/400M-480M
• SR_FRS_1WV: 1W/136M-174M
• SR-FRS-2WU: 2W /400M-480M

Please select the module you want for the demo-B. It can be used for voice intercom and data transfer demonstration. Also it can be used for development based on the demo board. It is easy to set all the module parameter via the USB interface. When select the channel, it would voice broadcast the current channel number. You may quickly evaluate our module performance by the demo board. Just make a little modification and it can be directly applied into your real production.

The Demo board performance：

• It has the power switch, volume adjust, and channel selection switch.

• 16 channels can be selected by the encoder switch.

• It is easy to switch the VOX(Sound control transmit) by a VOX switch, the VOX level can be set via the PC.

• Voice broadcast for the channel number. Chinese/English could be selected.

• Monitor function by press [MON]key.

• Voice intercom demo.

• Data transfer demo.

• One group user interface: SQ, LINE_IN, LINE_OUT, PTT, GND

• Ability restore to the factory parameter setting

• The demo board parameter can be set via the USB interface, for the setting instruction please contact us to get the 《serial communication protocol》

• Tx frequency, Rx frequency can be set alone;

• Tx CTCSS, Rx CTCSS can be set alone;
• Rf output power can be set by software;
• Companding setting;
• Transmit Busy lock setting;
• Squelch level setting
• GBW bandwidth setting
• MIC sensitivity setting
• Scramble setting
• Volume setting
• VOX level setting
• TOT setting(Timer of transmit)
• Auto power save setting
• Data transfer
• All setting can be kept when power off

The demo board function define picture

• The demo board size：45mm X 90 mm;

• DC power supply:3.3V-5V;

• USB type: MICRO USB;

• User interface：SQ, Line _in, Line_out, PTT, GND; When use Line_in，Should push the MIC selection to “EXT”position；

LED

• Red led： DC power indication；
• Yellow： Transmit status indication
• Blue： Receive signal indication

The demo board operation

The voice intercom operation

• Please mount the power, antenna, and speaker;. Push the MIC select switch to ‘INT’ position.

• Power on the demo board, and then the power indication LED(red) turns on, Then rotate the volume adjust switch to a proper position; After about 1seconds, the demo board would voice broadcast the current channel number.

• Adjust the channel selection switch, ensure the transmitter and receiver are at the same channel;

• Hold on the [PTT] key, and the transmit indication LED (yellow) turns on. You may talk to the opposite side. After finished the talking, release the key, the system automatically into the receive statues, When received the signal from the opposite side, The receive indication LED(blue)turns on;

• At weak signal area, you may hold on the[MON] key, the system into monitor mode, release the [MON]key, the monitor mode is cancelled;

• The frequency and the CTCSS for every channel can be set alone via the USB interface;

The sound control transmit operation(VOX)

• Push VOX switch to ON position, the VOX function is enabled, You may talk without [PTT]key, the system will automatically into transmit status.

• During the VOX valid status,The transmit indication LED(Yellow) turns on. When VOX enabled, the [PTT] key is still valid.

• Push VOX switch to OFF position, the VOX function is disabled, you can only intercom by press the [PTT] key.

• The VOX sensitivity can be set via the USB interface.

NOTES:

• For detail specs, please contact us.

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