User Manual

SPEEDCOM SC5800 User Manual
11
2 TECHNICAL DESCRIPTION
2.1 System Overview
A SC5800 digital radio link (DRL) consists of a pair of SC5800 radio stations.
The SC5800 radio station consists of two main parts:
• An Outdoor Unit operating in the 5.8 GHz ISM frequency band. The Outdoor
Unit provides the radio transceiver functionality by accepting radio link data from
the Indoor Unit and converting it to the 5.8 GHz ISM frequency band using
spread spectrum modulation. The received signal is de-spread and transmitted
to the Indoor Unit in a digital format.
• An Indoor unit, available with 1, 2 or 4 E1 and 1, 2 or 4 T1 data interfaces
(choice of E1 or T1 is software selectable). The Indoor Unit combines nE1 or
nT1 data with Wayside Service Channel serial data and link IP data to be
transmitted across the radio link. The Indoor Unit also provides power to the
Outdoor Unit.
Interconnection between Outdoor Unit and Indoor Unit is achieved using low cost
data and power cables.
2.2 Outdoor Unit
The SC5800 Outdoor Unit makes use of Spread Spectrum modulation technology for
license-free operation in the 5.8 GHz ISM band.
For SC5800 operation, the 5.8 GHz ISM band is divided into upper and lower
frequency sub-bands. An SC5800 ‘High Band’ Outdoor Unit transmits in the higher
frequency sub-band and receives in the lower frequency sub-band, while a ‘Low
Band’ Outdoor Unit transmits in the lower sub-band and receives in the higher sub-
band. An SC5800 radio link will use a ‘Low Band’ Outdoor Unit on one end of the
link to communicate with a ‘High Band’ Outdoor Unit on the other end.
The SC5800 Outdoor Unit uses a Type-N RF output connector for connection to any
5.8 GHz antenna for applications where long range is required.
User Data
SC5800 ODU
SC5800 IDU
User Data
SC5800 ODU
SC5800 IDU