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noise. The system also has a high degree of redundancy so that a failure of any antenna will not put the system at risk from dropout”. The entire system is broadband and unfiltered, the antennas cover from 470 to 870MHz. With 5 Watt walkie talkies on 515MHz that can be in close proximity to the antennas the large signal handling of the amplifiers is critical as any overload could cause serious loss of signal. In the finished system the combined noise floor was -112dBm with no overload even with levels of up to 20dBm when a walkie talkie was keyed up under an antenna! The LNNA antennas are ideal as the gain can be set from the front panel in 1dB steps from 0 to 15dB meaning that just the correct make up gain can be applied to compensate for feeder loss. In some areas, such as the Bush Telegraph where the celebrities are very close to the antennas, gain can be easily taken out to ensure the very local antennas’ contribution to the mix is at a similar average level to that from areas where the talent is located further away. Hard wire runs between antennas and matrix combiners also had to be considered. Some of the feeders were up to 500m long so Wisycom BAW amplifiers were deployed at appropriate points, providing gain range from 0 to 22dB with very high line driving power making them ideal for the application. Despite the tough conditions and wild nature of the location the system has proved to work flawlessly. Wisycom’s products and Raycom’s RF expertise worked seamlessly to provide a reliable solution. They now look forward to even more extreme projects. Perhaps “I’m on the moon get me off here” is already in the planning stages ? raycom.co.uk TV-BAY111MARCH_Book.indb 57 11/03/2016 17:17