03 Feb 2014

CommScope Introduces FiberFeed Direct for Remote Radio Units

One of the issues with installing mobile or cellular base stations is the choice of where the RF systems should be located. If they are located at the base of the tower, they are easy to access for installation and fault finding. Locate them at the top of the tower by the antenna, and then the RF performance can be considerably improved because the cable losses can be all but eliminated.

Another issue that is becoming increasingly important is that of passive intermodulation. Experience shows that one of the major causes is poor connector performance, especially where long cable runs with connectors are required - another reason for locating the remote radio units or RRUs with the antenna..

As a result of these performance issues, many operators are opting for the placement of the RF circuitry as close to the antenna as possible. From the RF viewpoint this makes sense. However the installation and service engineer needs to access these circuits while at the top of the tower for installation, or when there are any faults. As fibre connections are used direct to the RRU, installation is not easy.

With typical remote units requiring a considerable degree of interconnection - most systems accommodate several standards from GSM through 3G to the latest 4G and this requires a considerable degree of interconnection. Not easy.

To accommodate these issues, CommScope is offering a specific breakout canister. This is part of the new HELIAX FiberFeed Direct solution. The breakout canister comes pre-wired on the end of the hybrid trunk cable. The power and fibre tails can easily be plugged right into the RRUs, foregoing the need to wire up a junction box. The intended result is much easier installations with more reliable results.

The HELIAX FiberFeed Direct system will mate to any RRU model. This reduces the number of overall connections needed and this also reduces the fibre installation time, CommScope state, by half.

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