The two main problems that I have identified in my experience are when an interfering signal is very strong and overloads the TV tuners/ distribution equipment and the other is when the interfering signal is within the frequency range that you wish to receive. Most different services use different frequencies meaning they do not overlap one and another but this doesn't mean they can't cause problems. It helps to think what a TV signal is, it is essential and exchange of information over the air via radio-waves, an interfering signal or source of interference will disrupt this process.
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How Does Interference Cause Problems With TV Signals? It’s not impossible that you can get interference on your satellite TV signal or cable TV signal, it just isn’t as common. Primarily most interference on TV signals is with regards to when a TV signal is received via a conventional TV aerial/ antenna for terrestrial TV services. In the old analogue days, TV interference could usually be seen as lines on the TV screen which may come and go, you must remember when a mobile phone would ring and for a brief period of time while it connects you would get lines on you picture accompanied with a short pulsing sound, this isn’t the same with digital TV where interference can be catastrophic as it can cause your TV to break-up, become blocky and pixelate or it can cause complete loss of signal, either way your stuck with a TV picture that you won’t be able to watch. I have had even a several enquiries reporting of the ferries that go to Isle of Wight interfering with signals in places like Portsmouth. There are lots of different types of interference which I detail below, some of which can be easy to identify like interference from telecoms masts, others can be more difficult like some sort of impulse noise. Please note that this is sort of a sister blog to our blog on ‘ types of TV filters’ so I recommend that you read that when you’re done here. You may be wondering what can interfere with my TV signals? What type of interference do I have? And what can I do to resolve this? In this blog, I attempt to give a relatively detailed explanation on the different types of TV interference and what the potential sources of this might be. Some most common reasons for a bad TV signal are too much signal, not enough signal, damaged/ faulty equipment and many other reasons including interference. If you’re suffering with a poor TV signal, there can be multiple reasons for this. Interference on TV Aerial/ Antenna Systems All You Need To Know