By Jack Golin and Michael Kolcun, ITT Space Communications Inc.
THE EA subjective analysis of the effects of different types of interfering carriers on TV picture and sound was conducted. Interference from TV, High Speed Data, and FM/FDM Carriers was evaluated to determine the level at which each interference is first observed, which type produced the worst distortion, and the level at which each type of interference becomes unacceptable, The results indicated that interference from another TV carrier has the worst effect. TV interference was first noticed on the picture at a carrier to interference ratio of 18 dB, A subjective average showed that the picture becomes unacceptable at a carrier to interference ratio of 14 dB. It can be concluded that an earth station operating in an environment where the C/I is greater than 18 dB should have acceptable TV reception.