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DMR818-UHF VHF module-2W high power DMR module-Digital Walkie Talkie Module
DMR818 is a 2W long-distance DMR walkie talkie module, it comes with built-in high-performance microcontroller, digital mobile radio IC and RF power amplifier. All parameters(CTCSS, CDCSS, SQ, Predefined channels, etc.) can be easily modified with a protocol. With an external power supply, speaker, and audio amplifier, it is easy to become a professional digital walkie talkie. Simplified interface and Ultra-small size make this module widely used in various applications and conveniently embedded into a various handheld devices.
Features and application:
Features:
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UHF band frequency: 400~470 MHz
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Distance up to 4~6Km
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Max power output to 2W, low power to 0.5W
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High Sensitivity: -124dBm
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Bit error rate down to 1% under -121dBm
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Independent frequency for Tx and Rx.
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Bandwidth: 12.5 / 25 kHz
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DMR(Digital Mobile Radio)/Analog
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Message transmission and reception
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Built-in EEPROM, data saved even powered off
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1ppm TCXO crystal
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51 CTCSS
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166 CDCSS
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9 adjustable volume
Application:
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DMR walkie talkie module
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Invisible intercom system
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building security system
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audio surveillance system
DMR mode:
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Message transmission and reception.
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Message calling return receipt;
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Enhanced encryption of Voice and Text message.
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Various voice call types: All call, Group call, and Private call;
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Reminder for input calling, calling status checking
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Emergency alarm and radio monitor;
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Radio kill and activate;
Repeater:
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Analog mode:
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CTCSS/CDCSS configurable
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Squelch levels configurable
Electrical characteristics:
Typical Schematic Circuit:
Functions descriptions:
DMR818 has default 16 channels, CH1~CH8 in DMR mode, CH9~CH16 in analog mode. All the parameters can be configured by serial instructions. For details, please check the “DMR818 communication protocol”. Note: When module in radio killed mode, most of the serial instructions can’t be responded, It will return message 0x07 (Radio killed) or 0x01(Busy) to indicate.
Pin and dimension:
Mechanical Dimension:
Subtitle | N/A |
---|---|
UPC/EAN | 679043314902 |
Count | N/A |
M.R.P | N/A |
Brand Name | CentIoT |
Model | DMR81 |
Whoesale | Available |
Frequency | 400~470 MHz |
Gain | N/A |
VSWR | N/A |
Wire diameter | N/A |
Color | N/A |
Lead wire | N/A |
Maximum output power | 2W,low power to 0.5W |
Height | N/A |
Operating Temperature | N/A |
Input impedance | N/A |
Dimension | N/A |