Packing list

2PCS DMR818S-CE UHF DMR Walkie Talkie Module

1. Descriptions

DMR818S is a 2W TIER II & 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 protocol. With 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 various handheld device. Remark: there are two versions of this module: DMR818S-NVOC & DMR818S-AMBE. DMR818S strictly uses lead-free process for production and testing, and meets RoHS and REACH standards.

DMR818S-U has obtained CE-RED and FCC ID certification.

Features:

• UHF band frequency: 400~470 MHz (FCC / CE-RED certified)
• VHF band frequency: 134~174 MHz
• 350 band frequency: 320~400 MHz
• Distance up to 5Km
• Max power output to 2W, low power to 0.5W
• High Sensitivity: -124dBm
• Bit error rate down to 1% under -121dBm
• Independent frequency for Tx and Rx.
• 9 adjustable volume
• Analog Bandwidth: 12.5 / 25 KHz
• Digital Bandwidth:6.25KHz
• Message transmission and reception
• DMR(Digital Mobile Radio)/ Analog walkie talkie
• Built-in EEPROM, data saved even powered off
• 1ppm TCXO crystal
• 51 CTCSS
• 166 CDCSS

Applications

• DMR walkie talkie module
• Invisible intercom system
• Building security system
• Audio surveillance system
• DMR Mode of DMR Walkie Talkie Module DMR818S
• Message transmission and reception.
• Enhanced encryption of Voice and Text message.
• Various voice call types: All call, Group call and Private call;
• Reminder for input calling, calling status checking
• Emergency alarm and radio monitor;
• Repeater

Analog Mode of DMR Walkie Talkie Module DMR818S

• CTCSS/CDCSS configurable
• Squelch levels configurable

Application circuit

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Specifications

Pin definition

Mechanical dimension