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As a DMR Tier2 and Tier3 product with ergonomic design, all-round digital functions, TM840(DM850) helps increasing management efficiency and being responsive in emergent situations. 

Mobile - TM840(DM850)


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TM8401.8” Graphic Dot-matrix True Color Display

The large-sized, full color display enables the access to desired information easily even under bright sunlight. Date & clock is appearing on screen for daily use.

TM840Multiple Languages

TM840(DM850) supports multiple languages like English, simplified Chinese, German, French, Turkish Spanish and customize Languages.

TM840One Touch Operation in Usage

TM840(DM850) provides four programming keys and two keys programming in keypad, that provides the one touch operation like Text Message, Voice Calls.

TM840Versatile Voice and Data Service

Intelligent TM840(DM850) supports various voice call types, including Private Call, Group Call, All Call and Emergency Call, as well as the rich data services, e.g. GPS, Text Message, IP connect and Data Transfer.

TM840Privacy of Voice and Data

TM840(DM850) supports analog scrambling, and digital encryption using Advanced Encryption Standard (AES)*1 , DES and ARCFOUR (ARC4) encryption methodology to both voice and data.


Integrated GPS enables the real time tracking of the mobile working team.

TM840LIP Location Information Protocol 

\TM840(DM850) allows the master user to send GPS message to slave users in case of need.

TM840Various Analog Signaling Types

TM840(DM850) supports various analog signaling types (KDC1200, DTMF, 2-Tone and 5-Tone), various squelch control types (CTCSS/CDCSS), thus providing higher function expansion capacity to the analog mode.

TM840Supplementary Services

TM840(DM850) supports supplementary services of Radio Check, Remote Monitor, Call Alert, Radio Enable and Radio Disable.

TM840Accessory Expansion Including Analog/Digital

Telephone Interconnect (via DTMF signaling)  TM840(DM850) is designed with the second develop accessories ports via rear port of the mobile, e.g. emergency footswitch.

Besides it is possible to support simplex voice communications between radio and telephone users. It allows a radio user to make a telephone call; or a telephone user to make either a Group or Private Call to radio users through Private Automated Branch Exchange (PABX) or Public Switched Telephone Network (PSTN).

TM840Dual Modes (Analog+Digital) 

TM840(DM850) operates in either analog or digital mode in each channel. It is compatible with the prevalent analog system, ensuring a smooth analog to digital transition. 


TM840(DM850) supports scanning of pure analog voice and signaling, pure digital voice and data, and also mixed mode scan that comprises analog and digital activities.

TM840Option Board

TM840(DM850) reserves standard interface for any third party to further develop desired functions(such as Record, Bluetooth) with optional board.

TM840Dual-slot Pseudo Trunk

This feature can improve frequency efficiency by allocating the free slot to a member and helps you to communicate timely in an emergency.


Automatic roaming helps you to use the radio freely among all sites of a IP Multi-Site Connect system.

TM840Software Upgradable to DMR Tier2 or Tier3

The advanced features  DMR Tier2 or Tiers can be upgraded to your existing TM840(DM850) radios by software without purchasing a new one.

General Transmitter Receiver Environmental Specifications
Frequency Range 136~174MHz, 400~470MHz Frequency Stability 0.5 ppm Frequency Stability 0.5 ppm Operating Temperature -30℃~+60℃
Channel Capacity 1024 Power Output Low Power25W High Power40W(UHF)/45W(VHF) Digital Sensitivity 5%BER0.22μV Storage Temperature -40℃~+85℃
Zone Capacity 248 FM Modulation Limiting ±2.5kHz@12.5KHz, ±4kHz@20kHz, ±5kHz@25kHz Analog Sensitivity 0.3μV (12dB SINAD) Thermal Shock MIL-STD-810 C/D/E/F/G
Channel Spacing 12.5KHz/20kHz/25KHz FM Hum and Noise -40dB@12.5kHz -45dB@20kHz/25kHz Intermodulation TIA603C:70dB ETSI:70dB Humidity MIL-STD-810 C/D/E/F/G
Operating Voltage 13.8V ±15% Conducted/Radiated Emission -36dBm@<1GHz, -30dBm@>1GHz Adjacent Channel Selectivity ETSI 60dB@12.5kHz,70dB@20kHz/25kHz ESD IEC 61000-4-2(level 4)
Current Drain-Standby(Max) <0.6A Adjacent Channel Power -60dB@12.5KHz,-70dB@20kHz/25KHz Spurious Response Rejection TIA603C:75dB ETSI:70dB Dustproof & Waterproof IP54
Current Drain-Receive(Max) <2.0A FM Modulation Mode 12.5KHz:11K0F3E 25KHz:16K0F3E Conducted Spurious Emission -57dBm@ < 1GHz, -47dBm @> 1GHz
Current Drain-Transmit(Max) <14A(40W) 4FSK Digital Modulation 12.5KHz(data only):7K60FXD Rated Audio Power 3W
<8A(25W) 12.5KHz(data+voice):7K60FXE Rated Audio Distortion ≤3% (Typical)
Dimension 176mm×59mm×183mm Audio Response + 1dB~-3dB Hum and Noise -40dB@12.5kHz -45dB@20kHz/25kHz
Weight 1.5Kg Audio Distortion ≤3% Audio Response +1~ -3dB
Vocoder AMBE+2TM
Digital Protocal ETSI TS 102 361-1, -2, -3, -4
  • Mobile - TM840(DM850)
  • TM840(DM850)