TWC 2012: Axell Wireless enhances digital TETRA repeater capability

Enhancements to the CSR438 digital band selective repeater include configuration via graphical user interface in either band or channel selective modes

TWC 2012: Axell Wireless enhances digital TETRA repeater capability

Axell Wireless has enhanced its CSR438 digital band selective TETRA repeater to enable it to operate in either ‘band’ or ‘channel’ selective modes. This band and frequency shifting capability can be used to enhance the reach of a TETRA base station.

The company’s pioneering SDR (software defined radio) and digital filtering technology means that the enhancements to the CSR438 repeater do not require hardware upgrades, and can be re-configured remotely using software updates. 

The new enhancements allow the CSR438 TETRA digital repeater to be configured via a GUI (graphical user interface) to operate in either ‘band’ or ‘channel’ selective modes. Thus systems integrators and public safety operators can easily deploy systems in a typical 5MHz band selective mode and then to improve selectivity and reduce noise at a later stage reconfigure the unit to operate with a unique set of channels within the band - providing total flexibility within the same unit.

The switch from ‘band’ selective to ‘channel’ selective, or vice versa, can be done through a local connection to the CSR438 or remotely via a wireless modem or Ethernet connection. Whilst operating in ‘channel’ selective mode the CSR438 provides filtering for up to eight channels.

The CSR438 TETRA digital repeater is designed to support public safety networks and PMR (Professional Mobile Radio) systems for security applications either within buildings or critical infrastructure facilities such as metro (underground) networks, rail or road tunnels, airports, and energy or chemical plants. Its broad frequency capability allows the CSR438 to operate from 380MHz to 470MHz in bands of up to 20MHz in bandwidth.

Equally operating in ‘channel’ selective mode a narrow band part of the spectrum can be selected through a simple GUI interface. Axell’s unique and patented DSP architecture allows the CSR438 to continue to be enhanced through simple upgrades in software.  

Axell Wireless CEO Ian Brown (pictured) commented: ‘Axell has pioneered TETRA repeater technology since the communications standard was introduced. Indeed Axell was the first manufacturer of coverage equipment to provide support for TETRA. Since then we have continued to focus on technical leadership and innovation. Today our public safety applications portfolio is extensive and enables Axell to provide a one-stop shop service for customers with products for both outdoor and indoor applications. The addition of further functionality to the CSR438 digital TETRA repeaters continues that commitment and enables our customers to meet the changing demands on public safety and private networks.’

Written by Wireless magazine
Wireless magazine

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