The Fiber Distribution Unit (FDU) provides the means to convert the RF input signal from the SXM Dual band exciter (DBE) into optical outputs that are used to distribute the SXM transmission to multiple Remote Fiber Units (RFU’s). The FDU also provides bi-directional digital fiber connections to the individual RFU’s to provide remote monitoring and control and reporting of real time signal quality metrics. An Automatic Leveling Control (ALC) and signal conditioning loop adjusts the gain of the FDU to ensure the optimal RF signal level to the input RF to Fiber Converter. Up to four optical fiber outputs are provided to distribute the SXM signal to multiple Remote Fiber Units.
The FDU provides a constant communication link with the built-in ERMS modules in the RFU’s. The ERMS provides health monitoring and alarming for the LB and HB SXM waveform. SXM Signal quality metrics such as RSSI, SINR, and RS Errors are reported to the FDU and can be monitored remotely.
Remote Monitor and Control is supported via Ethernet/SNMP. Local Maintenance and Control functionality is supported via the front panel. A second Ethernet port and a second set of dry contact relays are provided for alarm notification and real time monitoring of signal quality metrics of each remote repeater.

The CCI Fiber IP Repeater is a cost effective and easy to implement solution to provide high power distribution of the SXM LB and HB transmission over the existing AT&T network. The CCI Dual Band Fiber Repeater is specifically designed to work with the SXM Dual Band Exciter (DBE) which accepts both High Band and Low Band UDP Stream inputs.
The Fiber IP Repeater consists of a single Fiber Distribution Unit (FDU) which supports up to four Remote Fiber Units (RFU’s) and contains an integrated RF to Fiber converter which converts the RF output from the DBE to four Fiber outputs that are used to distribute the SXM signals to multiple tower mounted Remote Fiber Units (RFU’s). The Remote Fiber Units (RFU’s) contain an integrated Fiber to RF converter and pre-amplification and power amplification for power transmission of the SXM LB and HB RF outputs over the AT&T network. The integrated WCS/SXM Diplexer eliminates the need for any other hardware on the tower or rooftop.
Remote Monitor and Control functionality of the Fiber IP Repeater is supported via Ethernet/SNMP. The NRCC can remotely access the FDU and its support peripherals. Local Maintenance and Control functionality is supported via the front panel. A second Ethernet port and a second set of dry contact relays are provided for alarm notification and to allow SXM to monitor the performance of the repeater system including real time monitoring of signal quality metrics of each remote repeater.