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Hytera RD985S - DMR repeater

Simply a jack-of-all-trades: The RD985S supports conventional analog and DMR radio as well a DMR trunked radio, single-frequency network and Hytera XPT.

    Product description

      360grad Icon

      The digital repeater RD985S is a genuine multi-talent: It supports not only conventional radio operation in analog and DRM modes, but can also be used in DMR trunked radio systems and, besides, is responsible for radio coverage in DMR Simulcast and Hytera XPT Systems.

      The repeater was developed in conjunction with the open ETSI standard Digital Mobile Radio (DMR) and, thanks to its technical features, it is your perfect companion on the path toward digital radio.


      DMR-Repeater RD985S - Produktfoto

      Heart of professional radio systems

      All the repeaters from Hytera can be connected in digital mode via IP connection to a comprehensive radio network. In analog mode, the repeaters can be connected together back-to-back. Both in conventional analog and DMR modes (DMR Tier II), the RD985 and RD985S repeaters can be used with the RD625 and RD965 repeaters in a radio system.

      Upgradeable for greater challenges

      The RD985S repeater supports not only conventional analog and digital modes, but also other modes that can be unlocked with an upgrade. It can be upgraded into a base station for DMR synchronization, DMR trunked radio or Hytera XPT radio systems. This means that the RD985S is a secure investment for growing radio projects.

      Improved utilization of the frequency spectrum

      Thanks to the TDMA technology, twice as many users can use the same channel, such as is the case with analog or digital FDMA systems. Due to the restricted frequency resources, this represents an important relief and reduces the expenses for system terminals and licenses.

      Secure communication

      To protect your radio communications against eavesdropping, the RD985S repeater possesses advanced digital encryption functions, according to the DMRA specification. Depending on the variant, it supports 40-, 128- or 256-bit encryption. With air interface encryption signaling and communications data between radios and repeaters are transmitted with reliable protection. 

      Dual mode and automatic change

      The RD985S repeater can automatically change between digital and analog mode depending on the type of receiver signal.

      More transmitting power, more range

      The RD985S repeater offers an adjustable transmitting power of up to 100 Watt (UHF) and thereby satisfies the high requirements for modern PMR radio systems.

      Extremely reliable

      Since the RD985S was designed according to military standards, it offers high reliability and excellent performance. Test results from independent laboratories have shown that the device can be operated for up to 100,000 hours without interference (MTBF) and it therefore meets the requirements for use in extreme situations.

      Flexible installation options

      The RD985S can be installed in a 19-inch equipment rack with an optional installation kit. Alternatively, it can easily be operated on a rack, a bracket or a table. With the additionally available installation kit, an optional duplexer can be housed in the chassis.

      High cooling capacity

      The booster can dissipate any generated heat with extraordinary efficiency. In addition, the integrated fan system ensures stable and powerful operation.

      High-resolution 2-inch LCD color display

      Whether during ongoing operation or during a maintenance task: You can easily access all the desired information via the large LCD color display.

      Professional design

      Integrated LEDs on the volume controller complement the innovative repeater design and simultaneously optimize its use. The repeaters are easy to use thanks to their clear menus and the large navigation controller.

      Clear LED indicators

      The 8 LED indicators on the front allow the current repeater status to be easily identified


      Technical data

      General data

      Frequency range

      VHF: 136 MHz - 174 MHz (RD985S)
      UHF: 400 MHz - 470 MHz / 450 - 520 MHz (RD985S)
      UHF: 400 - 470 MHz (RD985S 100 W)

      Supported operating modes
      • DMR Tier III (optional, ETSI TS 102361-1/2/3)
      • XPT (optional)
      • DMR Tier II (ETSI TS 102 361-1/2/3/4)
      • DMR Tier II Simulcast (optional)
      • Analog
      Number of channels


      Number of zones


      Channel spacing

      12.5 / 20 / 25 kHz (analog)
      12.5 kHz (digital)

      Operating voltage

      RD985S: 13,6 ± 15% VDC
      RD985S 100 W: 28 VDC

      Max. power consumption (in stand by)

      RD985S: ≤ 0.8 A
      RD985S 100 W: ≤ 0.5 A

      Max. current consumption (during transmission)

      RD985S: ≤ 11 A
      RD985S 100 W: ≤ 12.5 A

      Frequency stability

      ± 0.5 ppm

      Antenna impedance

      50 Ω

      Dimensions (H × B × T)

      88 × 483 × 366 mm


      8.5 kg

      LCD display

      220 × 176 pixel, 262,000 colors, 2.0 inch, 4rows


      Transmitting power

      RD985S: 1 – 50 W
      RD985S 100 W: 5 – 100 W


      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

      Noise cancellation

      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 response

      + 1 dB to - 3dB

      Nominal audio distortion

      ≤ 3 %

      Digital vocoder type

      AMBE +2™


      Sensitivity (analog)

      0.28 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/ 75 dB at 20 / 25 kHz
      ETSI: 65 dB at 12.5 kHz / 70 dB at 20 / 25 kHz


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

      Spurious response rejection

      TIA-603:80 dB at 12.5 / 20 / 25 kHz
      ETSI: 80 dB at 12.5 / 20 / 25 kHz

      Signal-noise ratio (S/N)

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

      Nominal audio power output

      0.5 W

      Nominal audio distortion

      ≤ 3 %

      Audio response

      + 1 dB at - 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

      Relative humidity

      < 95 %

      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

      • Repeater RD985S
      • Power cable, 12 VDC
      • Fuse
      • Manual

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