Page 115 - Microsoft PowerPoint - Foundation Licence Training [Compatibility Mode]
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Section 6 Propagation u VHF, UHF and frequencies above UHF are dependent on an almost clear line of sight path from transmitter to receiver u VHF and UHF are generally obstructed by hills and other large structures u VHF and UHF signals can be bent or diffracted over some obstacles u Temperature changes in the troposphere results in ducts that can cause VHF and UHF signals to be propagated over long distances 24 November 2009 TrainSafe Australia 115
