CCI’s Remote Tunable Narrow Guard Band Filter-Combiner (LLC) combines multiple Cellular Band signals onto a single feeder without the insertion loss normally associated with passive combiners. This new highly compact model requires little or no guard band depending on the technologies being combined thus maximizing the usage of allocated spectrum.
A precisely matched filter which is wide enough for a UMTS or three CDMA channels allows the carrier to be positioned anywhere in the Cellular band and provides high rejection of unwanted spurious emissions and noise. Transmit paths are fully isolated to prevent interference and intermodulation products. Note that any technology (including GSM/UMTS, UMTS/UMTS, LTE/UMTS, LTE/LTE, CDMA/LTE) can be combined when utilizing this LLC. Multiple units can also be cascaded for deployment of additional channels.
When not tuning, no power is required, effectively becoming a pure passive low loss filter combiner. The LLC can be controlled locally or remotely via TCP/IP or Ethernet requiring only a web browser for simple access.
All software is resident internally; no extra software or controller is required. Note that the Bandpass port “only” passes Tx signals, but the Bandstop port is fully duplexed and passes Tx/Rx signals. The unit is housed in a single rack-mounted 19” by 2U assembly.