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Hytera MD655 - DMR mobile radio

Small mobile radio with operation via handheld microphone.

    Product description

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      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

      • Analog scrambling
      • Data services:

        • Control of the radio via API

      • Versatile voice calling: individual call, group call, broadcast call, emergency call, data call
      • Upgradeable software
      • Basic functions

        • Either analog or digital operation
        • Pre-programmed text messages
        • Automatic cell re-selection (roaming) in IP multi-site systems
        • Scan
        • Channel announcement
        • Integrated GPS (optional)
        • Option board for self-developed extra functions (optional)

      • Special functions

        • Pseudo trunking
        • Telemetry
        • Rental function

      • Security

        • Emergency alarm
        • Dedicated emergency button
        • Alarm call
        • Lone worker function
        • Advanced encryption (40 bits)
        • Advanced encryption (128 / 256 Bit) (optional)
        • Multi-key encryption (optional)
        • Over-the-air encryption (signaling encryption)
        • Priority Interrupt (optional)
        • Remote Monitor
        • Enable/disable terminal
        • GPS messages (optional)

      • Audio functions

        • Automatic gain control (AGC)
        • Digital rejection of acoustic feedback
        • Automatic volume and treble boost (LQO)
        • Three-band equalizer

      Technical data

      General data

      Frequency range

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

      Supported operating modes
      • DMR Tier II (conventional DMR)
      • Simulcast
      • XPT Digital Trunking
      • DMR Tier III (DMR trunked radio) (optional) 
      • Analog
      • MPT 1327

      DMR Tier II in accordance with ETSI TS 102 361-1/2/3
      DMR Tier III in accordance with ETSI TS 102 361-1/2/3/4

      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

      on the handheld microphone 1.5 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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