Single Channel Radio Transceiver (SCRT)

SCRT

The Single Channel Radio Transceiver (SCRT) is housed in a masthead unit that forms the remote radio head of the HiperMAX system. Several antenna and mounting arrangements are available for the SCRT, including a front mounting antenna. Alternatively independently mounted antennas may be used. The SCRT can be pole mounted or plate mounted and several installation kits are available depending on the operator’s preference.

 

HiperMAX RF Subsystem

The RF subsystem in HiperMAX often consists of 2 SCRTs. Each SCRT contains a transmitter and receiver. The transmitter processes the downlink digital WiMAX data stream originating at the SDR, converts the signal to the analogue domain, then modulates, up-converts, amplifies and filters the RF signal. The receiver provides the inverse function, filtering, down converting and digitising the received uplink signal before presenting the received data stream to the SDR. The two SCRTs can provide either two individually distinguishable sectors or a single sector with diversity. The SCRT subsystem connects to the SDR using a fibre optic cable.

Various versions of the SCRT are available to address different radio bands. The current main variants provide 4.9GHz TDD, 3.4-3.6GHz FDD and cover various frequencies in the 3.3-3.8GHz TDD bands.

 Antennas:

Normally the antenna is mounted on the front of the SCRT but antennas are available to mount independently of the SCRTs with short lengths of coaxial cable to connect the two. Antennas are also available, for specific bands and sector angle, which mount directly onto the front of the SCRT. For details of antennas for each frequency see the Airspan Product Catalog 005-8404-000