Hytera RD985 - DMR repeater

The digital repeater RD985 was designed according to the DMR radio standard and in consideration of the actual requirements of its users.

Product description

The digital repeater RD985 is the heart for multi-cell conventional DMR radio networks and was developed according to the ETSI standard for DMR. It offers an ergonomic design, reliability and outstanding digital functions for sophisticated communication. RD985 – Your digital advantage over your competitors!

Dual mode and automatic change

The RD985 can automatically change between digital and analog mode depending on the type of receiver signal.

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 repeater can be used together with the RD985S, RD625 and RD965 repeaters in a radio system.

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 RD985 repeater possesses advanced digital encryption functions, according to the DMRA specification. Depending on the variant, the RD985 supports 40-, 128- or 256-bit encryption. With air interface encryption signaling and communications data between radio and repeaters are transmitted with reliable protection.

High transmitting power

The repeater offers an adjustable transmitting power of up to 50?Watt and thereby satisfies the high requirements for modern PMR radio systems.

Extremely reliable

Since the repeater was designed according to military standards, it offers high reliability and excellent performance. Test results from independent laboratories have shown that the repeater 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 RD985 repeater 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.

Features

Technical data

General data

Frequency ranges	VHF: 136 – 174 MHz UHF: 400 – 470 MHz / 450 – 520 MHz
Supported operating modes	DMR Tier II Analog DMR Tier II gemäß ETSI TS 102 361-1/2/3
Number of channels	16
Number of zones	1
Channel spacing	12.5 / 20 / 25 kHz (analog) 12.5 kHz (digital)
Operating voltage	13.6 ± 15% V_DC
Max. power consumption (in stand by)	≤ 0.8 A
Max. current consumption (during transmission)	≤ 11 A
Frequency stability	±0.5 ppm
Antenna impedance	50 Ω
Dimensions (H × B × T)	88 x 483 x 366 mm
Weight	8.5 kg
LCD display	220 x 176 pixels, 262,000 colours, 2.0 inches, 4 rows

Transmitter

Transmitting power	1 – 50 W
Modulation	11K0F3E at 12.5 kHz 14K0F3E at 20 kHz 16K0F3E 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 sensitivity	+ 1 dB to - 3 dB
Audio distortion	≤ 3 %
Digital vocoder type	AMBE +2™

Receiver

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 and 25 kHz ETSI: 65 dB at 12.5 kHz / 70 dB at 20 and 25 kHz
Intermodulation	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
Audio distortion	≤ 3 %
Audio sensitivity	+1 dB to -3 dB
Conducted spurious emission	< 57 dBm