In the past, all signal processing units on the base station were located at ground level instead of the top near the antenna, which leads to path loss due to long RF cabling. Nowadays, to prevent loss due to long RF cabling, the processing unit is divided into a preprocessing unit at the top of the mast, the remote radio unit (RRU), and the base band unit (BBU) located on the ground surface. The digital CPRI link is used to connect the RF unit at the top of the tower to the BBU located at the bottom. While this configuration offers power efficiency, it leads to other issues associated with maintenance, such as needing a technician to climb the mast to connect the signal analyzer via RF cables to see the uplink spectrum.
The SC2810 CPRI analyzer provides cell site installers, maintenance operations, and troubleshooters with a convenient tool that can be used on a live site. A low-loss optical splitter is inserted in series with the existing RRU-to-BBU optical cable, resulting in minimal disruption to the site’s operation. Splitters can be left onsite if multiple visits are required.
CPRI data can be collected and stored or viewed live. Live data is presented to the user on a Windows GUI or streamed via a front panel RF connector for analysis with an optional spectrum analyzer.