Hytera RD625 VHF DMR Repeater

The RD625 has been developed in accordance with the Digital Mobile Radio (DMR) open ETSI standard and can be operated with either digital or analogue signals.

Flexible IP networking

Hytera’s DMR repeater can be connected to an IP-based communication network with multiple sites. The roaming function is used to provide radios in this radio network with voice and data services across cells.

Connecting VoIP private automatic branch exchanges

The RD625 repeater makes it possible to connect existing VoIP telephone systems to the DMR radio network. This allows DMR radio subscribers to hold halfduplex conversations with participants from the telephone network. Telephone subscribers have the option of making either individual or group calls in the radio network.

Analogue and digital operation with the ability to switch automatically

The RD625 repeater can be operated both in analogue and in digital mode and is completely compatible with analogue systems currently in use. The device automatically changes between digital and analogue mode depending on the type of receiver signal, saving both time and money by eliminating the need to con gure frequencies and channels manually.

Adaptable transmitting power

The integrated power supply of the RD625 can automatically switch to a back-up DC supply from a sealed lead-acid battery if the AC supply fails. This makes it possible to provide a fail-safe solution for critical communications.

General

Frequency range VHF: 136 - 174 MHz 

Supported operating modes DMR Tier II (conventional DMR) in accordance with ETSI TS 102 361-1/2/3, analogue

Channel capacity 16

Channel spacing 12.5 / 20 / 25 kHz

Operating voltage 13.6 ± 15% VDC 90 V - 264 VDC

Max. power consumption (in stand by) ≤ 0.5 A at 13.6 VDC

Max. power consumption (during transmission) ≤ 5.5 A at 13.6 VDC

Frequency stability ± 0.5 ppm

Antenna impedance 50 Ω

Dimensions (H × W × D) 108 × 210 × 348 mm

Weight 5000 g (with duplexer)

Receiver

Sensitivity (analogue) 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 / 75 dB at 20 / 25 kHz

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

Intermodulation

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

ETSI 70 dB at 12.5 kHz / 20 / 25 kHz

Spurious response rejection

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

ETSI 70 dB at 12.5 kHz / 20 / 25 kHz

Signal-noise ratio (S/N) 40 dB at 12.5 kHz 43 dB at 20 kHz 45 dB at 25 kHz

Audio distortion ≤ 3 %

Audio sensitivity + 1 to - 3 dB

Conducted spurious emission < - 57 dBm

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

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 70dB at 20/25kHz

Audio sensitivity + 1 to - 3dB

Nominal audio distortion ≤3%

Digital vocoder type AMBE+2TM

Environmental conditions

Operating temperature range - 30 °C to + 60 °C

Storage temperature range - 40 °C to + 85 °C