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1800MHz Digital Channel Selective Repeater

1800MHz Digital Channel Selective Repeater


1800MHz Digital Channel Selective Repeater

Key features:

  • Supports GSM, WCDMA and LTE technologies in one unit
  • MCPA technology providing downlink power of 30dBm composite
  • 30dBm output power, 80dB gain
  • Supports up to 12 sub-bands by innovative DSP filtering
  • Top level EVM, ACRR and emission performance support latest HSPA technologies
  • SmartALC™ technology
    – Prevents oscillations and balances coverage
    – Automatically sets optimum gain
    – Ensures transparent network operation
  • Individual gain and ALC setting for each sub-band for single and multi-operator applications

D-SBR (Digital Single Band Repeater) 3018 is specifically designed for in-building GSM/WCDMA/LTE applications. It supports up to 12 sub-bands in the 1800MHz band (with optional for non-contiguous sub bands). Due to its state of the art DSP filtering it can support 2G, 3G and 4G technologies in the same repeater.

D-SBR 3018 fully meets GSM, 3GPP UMTS and LTE standard requirements. Highly linear components innovative DSP filtering provide top level performance that supports high throughput of the latest LTE technology.

MIMO operation is supported and recommend for all environments where the donor signal is received from a MIMO EnodeB. For this multiple D-SBR can be configured in parallel operation (i.e. 2 units for 2×2 MIMO).

D-SBR 3018 utilizes Cobham Wireless proprietary SmartALC power control algorithm. This algorithm provides more than gain control: it automatically optimizes the gain setting by learning the actual range of RSSI levels over a user-specified period of time. In addition, SmartALC prevents oscillations, reduces the amount of isolation required by the system which in turn improves network performance.

The SmartALC, together with the low noise figure of the Repeater, minimize noise rise at the donor cell site. SmartALC allows the installer to quickly set up the unit yet achieve the design goals specified by the system engineer.

Using an advanced ALC mechanism each one of the sub-bands has an individual gain and ALC setting, hence it is possible to support multi technology (2G, 3G and 4G) and multi operator in one unit.

The efficient thermal characteristics of the D-SBR 3018, careful component selection and robust design result in high system reliability.

D-SBR 3018 supports Intuitive Web management GUI that can be accessed using any standard browser (no client installation required) through a local or remote (via external modem) connection.

The D-SBR 3018 digital repeater is powerful enough to drive a passive Distributed Antenna system (DAS) for coverage areas over 100,000 ft2 (10,000m2) in buildings, parking lots, malls, warehouses and offices.

Cobham Wireless was formerly known as Axell Wireless


Downlink Uplink
Frequency 1805 - 1880 MHz 1710 - 1785 MHz
Passband Gain 80dB 80dB
Passband Ripple ±2.5 dB ±2.5 dB
Gain Attenuation Power 0 - 25 dB (in 1 dB steps) 0 - 25 dB (in 1 dB steps)
Composite Output Power +30 dBm +23 dBm
Noise Figure @ Maximum Gain (typical) 5 dB 4 dB
Propagation Delay 6 μsec 6 μsec
Number of filters (*) 1 to 12 or 1 to 8 1 to 12 or 1 to 8
Channel Allocation Adjustable, Contiguous/Non Contiguous
Conformance standard ETSI EN 300 609-4, GSM11.26, 3GPP TS 25.106


Power Supply 110 - 240 VAC, max 140w
Total RF Input Power + 10 dBm
Impedance Level 50 Ohm
RF Connector N-type Female
VSWR 1.5:1


Operating Temperature Range -10 to 50° C
Dimensions L x W x H 350 mm x 460 mm x 145 mm
Weight 13 kg
Weatherproof IP-65
Datasheet  pdf


(') Supports any BW option 200kHz-20Mhz by setting the filter start-stop frequency