Common use of Polarization Clause in Contracts

Polarization. No account was taken of polarization differences between the broadcasting and the aeronautical radionavigation signals except in special cases (e.g. circular polarization of the broadcasting signal). The interfering signals were assumed to have the same polarization (vertical or horizontal) as the navigation system. If, instead, the broadcasting signal has a different polarization, there is in theory some reduction of received interfering signal levels, but it was agreed not to make any allowance. In cases, however, where an equal power in the other plane of polarization is added at the transmitter (e.g. circular polarization), an allowance was made by adding 1 dB to the effective radiated power of the polarization component in the same plane as that used by the navigation system.