More than often any interference or disruption to a channel or programme’s signal is accidental. This could be the result of faulty equipment or incorrect ground station operation. However, signal interference can also be deliberate and intended.
Deliberate interference happens when a stronger and alien signal intercepts the same frequency of the broadcaster. This stronger signal is superimposed onto the official signal. What then occurs is a disturbance to the official frequency, preventing viewers from receiving a clear signal and the ability to tune in.