DMR Mobile Radio
1.8” 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.
TM840 supports multiple languages like English, simplified Chinese, German and French.
One Touch Operation in Usage
TM840 provides four programming keys and two keys programming in keypad, that provides the one touch operation like Text Message, Voice Calls.
Versatile Voice and Data Service
Intelligent TM840 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.
Privacy of Voice and Data
TM840 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.
LIP Location Information Protocol
TM840 allows the master user to send GPS message to slave users in case of need.
Various Analog Signaling Types
TM840 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.
TM840 supports supplementary services of Radio Check, Remote Monitor, Call Alert, Radio Enable and Radio Disable.
Accessory Expansion Including Analog/Digital
Telephone Interconnect (via DTMF signaling)
TM840 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).
Dual Modes (Analog+Digital)
TM840 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 supports scanning of pure analog voice and signaling, pure digital voice and data, and also mixed mode scan that comprises analog and digital activities.
|Normal Operating Voltage||13.8V|
|ESD||IEC 61000-4-2（level 4）|
|Dimension(with battery and antenna)||50mm×175mm×205mm|
|Weight(with battery and antenna)||1.5Kg|
|Frequency Stability||±1.5 ppm|
|Modulation Limiting||2.5kHz@12.5KHz, 5kHz@25kHz|
|FM Hum and Noise||－40dB@12.5kHz －45dB@25kHz|
|Conducted/Radiated Emission||-36dBm@<1GHz, -30dBm@>1GHz|
|Adjacent Transient Channel Power||-50dB@12.5KHz,-60dB@25KHz|
|FM Modulation Mode||12.5KHz：11K0F3E 25KHz：16K0F3E|
|4FSK Digital Modulation||12.5KHz(data only)：7K60FXD12.5KHz(data＋voice)：7K60FXE|
|4FSK Modulation Accuracy||5％@25℃, 10%@extreme temperature|
|Modulation Maximum Deviation||2.5KHz@12.5KHz , 5KHz@25KHz|
|Frequency Pull During Transmission||±100Hz|
|Nonnative Slot Power||-57dBm|
|Audio Response||+ 3dB, －3dB|
|Digital Protocal||ETSI TS 102 361-1, -2,|
|Frequency Stability||±1.5 ppm|
|Digital Sensitivity||0.22μV /-120dBm|
|Adjacent Channel Selectivity||ETSI: 60dB@12.5kHz,70dB@25kHz|
|Co-Channel Rejection||12dB@12.5KHz, 8dB@25KHz|
|Spurious Response Rejection||TIA603C：75dB ETSI：70dB|
|Conducted Spurious Emission||－57dBm@ < 1GHz, －47dBm @> 1GHz|
|Modulation Acceptance||3.5KHz@12.5KHz, 7KHz@25KHz|
|Rated Audio Distortion||3％ (Typical)|
|Hum and Noise||－40dB@12.5kHz －45dB@25kHz|
|Audio Response||+3dB, -3dB|
The Amateur Radio Emergency Service (ARES) will phase out the traditional ARES report forms later this year in favor of an online system called ARES C... Read more
“This video I will be assembling both the MFJ-1836 6 band cobweb antenna with the additional 30/40m add-on kit. The add-on kit is intended for t... Read more
“A DMR radio isn’t any good if it doesn’t have any frequencies or channels programmed into it. Programming your first DMR radio might feel a lit... Read more