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Hytera MD655 - DMR mobile radio

Small mobile radio with handheld microphone control.

    Product description

    No matter for which application, the DMR mobile radios MD655 are compact and user-friendly and, as a result, your reliable companion for secure communication. In addition to their outstanding voice quality and reliability, they excel through their simple operation via the handheld microphone.

     

    DMR-Fahrzeugfunkgerät MD655 - Detailansicht DMR-Fahrzeugfunkgerät MD655 - Detailansicht DMR-Fahrzeugfunkgerät MD655 - Detailansicht DMR-Fahrzeugfunkgerät MD655 - Detailansicht DMR-Fahrzeugfunkgerät MD655 - Detailansicht

    Intuitive operation

    The MD655 is operated completely via the handheld microphone, which contains all the required buttons and also an LCD display for this purpose. On top of that, two buttons can be freely programmed to assign important functions to them.

    Compact design 

    The MD655 excels through its stylish and particularly compact design. With its dimensions (165 × 140 × 46 mm) and a weight of only 1050 g, the mobile radio can be used in a multitude of ways. 

    Various installation options 


    With its operation via handheld microphone, the MD655 can be installed at any suitable location in the vehicle.  

    Adaptable transmitting power 

    Programming the MD655 allows adapting the transmitting power from 1 W to 25 W. 

    Analog and digital mobile radio (dual mode)


    In the MD655, it is possible to configure analog as well as digital channels. With the channel selection, this enables easily switching between analog and digital.

    Improved utilization of the frequency spectrum


    Thanks to Pseudo Trunking and the TDMA procedure, the MD655 allows assigning the available bandwidth with twice the number of channels. This has a clear mitigating effect on increasing spectrum scarcity.

    Expansion interface


    Thanks to the expansion interface, the range of functions offered by the MD655 can be expanded by significant key functions. Accessories and applications developed by partners can be connected to this interface.

    Features

    • Optional analog or digital operation
    • Secure encryption with encryption algorithm ARC4 (40 bit) in accordance with DMRA or with optional algorithms AES128 and AES256 (128 and 256 bit)
    • Analog scrambling
    • Automatic cell re-selection (roaming) in IP multi-site systems
    • Priority Interrupt (optional)
    • Different types of analog signaling: HDC1200, 2-tone and 5-tone dialing
    • Data services:

      • Text messages
      • Group text messages
      • Control of the radio via API

    • GPS functions (optional): send GPS text messages
    • Versatile voice calling: individual call, group call, broadcast call, emergency call, data call
    • Upgradeable software

    Technical data

    General data

    Frequency range

    VHF: 136 – 174 MHz
    UHF: 400 – 470 MHz

    Number of channels

    1024

    Number of zones

    64 (with max. 16 channels each)

    Channel spacing (analog)

    12.5 / 20 / 25 kHz

    Channel spacing (digital)

    12.5 kHz

    Operating voltage

     13.6 ± 15% VDC

    Max. power consumption (in stand by)

    ≤ 0.6 A

    Max. power consumption (during reception)

    ≤ 2.0 A

    Max. current consumption (during transmission)

    1 W: ≤ 3 A
    25 W: ≤ 8 A

    Frequency stability

     ±0.5 ppm

    Antenna impedance

    50 Ω

    Dimensions (LxWxH)

    165 x 46 x 140 mm

    Weight

    1050 g

    Transmitter

    Transmitting power

    1 – 25 W (adjustable)

    Modulation

    11 K0F3E at 12.5 kHz
    14 K0F3E at 20 kHz
    16 K0F3E at 25 kHz

    4FSK digital modulation

    12.5 kHz (data only): 7K60FXD
    12.5 kHz (data and voice): 7K60FXW

    Interfering signals and harmonics

    -36 dBm < 1 GHz
    -30 dBm > 1 GHz

    Modulation limiting

    ±2.5 kHz at 12.5 kHz
    ±4.0 kHz at 20 kHz
    ±5.0 kHz at 25 kHz

    Hum and noise

    40 dB at 12.5 kHz
    43 dB at 20 kHz
    45 dB at 25 kHz

    Adjacent channel selectivity

    60 dB at 12.5 kHz
    70 dB at 20/25 kHz

    Audio sensitivity

    +1 to -3 dB

    Audio distortion

    ≤ 3 %

    Digital vocoder type

    AMBE+2™

    Receiver

    Sensitivity (analog)

    0.3 μV (12 dB SINAD)
    0.22 μV (typical) (12 dB SINAD)
    0.4 μV (20 dB SINAD)

    Sensitivity (digital)

    0.3 μV / BER 5 %

    Adjacent channel selectivity

    TIA-603: 65 dB at 12.5 kHz / 75dB at 20 and 25 kHz
    ETSI: 60 dB at 12.5 kHz / 70 dB at 20 and 25 kHz

    Spurious response rejection

    TIA-603: 75 dB at 12.5/20/25 kHz
    ETSI: 75 dB at 12.5/20/25 kHz

    Signal-to-noise ratio (S/N)

    40 dB at 12.5 kHz
    43 dB at 20 kHz
    45 dB at 25 kHz

    Nominal audio power output

    Internal 3 W at 20 Ω, external 7.5 W at 8 Ω

    Audio distortion

    ≤ 3 %

    Audio sensitivity

    +1 to -3 dB

    Conducted spurious emission

    -57 dBm

    Environmental conditions

    Operating temperature range

    -30 °C to +60 °C

    Storage temperature range

    -40 °C to +85 °C

    ESD

    IEC 61000-4-2 (Level 4)
    ± 8 kV (contact)
    ± 15 kV (air)

    Protection against dust and moisture

    IP54

    Shock and vibration resistance

    MIL-STD-810 C/D/E/F/G

    Relative humidity

    MIL-STD-810 C/D/E/F/G

    GPS (optional)

    Time to first fix (TTFF) cold start

    < 1 minute

    Time to first fix (TTFF) warm start

    < 10 seconds

    Horizontal accuracy

    < 10 m

    Features marked with * are available in future versions of the product.

    All technical data were tested according to the respective standards. Due to continuing development, technical changes are reserved.

    Scope of delivery

    • Mobile radio MD655
    • Installation kit with installation clip
    • Battery connection cable
    • Fuse
    Also order:
    • Remote speaker microphone with LCD
    • GPS antenna
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