P Kemble C Eng,MIEE, BScPrincipal Engineer, IBA
Revised bySalim Sidat MBA,DBA, BSc (Hons), CEng,MIEECustomer Systems ManagermmO2, Ltd
In an ideal situation, all potential viewers would be provided with television programmes by means of a central high power transmitter. This would be modulated with audio and video signals from the studio, connected by means of a landline. Such an arrangement would represent the most economical means of distribution in terms of cost per viewer.
Unfortunately, such a simple situation is possible only at a limited number of locations. Intervening hills, buildings and even trees attenuate direct reception of a high power transmitter, particularly at UHF, causing a shadow in its coverage. Substantial ...