Digital Tv, & why we sometimes get pixilation of the Tv Picture

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Digital Tv, & why we sometimes get pixilation of the Tv Picture
Digital indicators are more affected than analogue indicators by poor carrier to sound and impulse sound. Of course, other forms of interference affect both analogue and digital indicators, but impulse sound is by its very definition impulsive. The susceptibility of DTT indicators to impulse sound is an important factor when making a good digital installation since it interrupts the data stream of picture information & corrupts that data. This can result in locked pictures, pixilation or total blanking. The well known types are car ignition picked up on the aerial, electrical fences, mercury arc lighting, or a home heating thermostat arcing causing spikes which journey through the coax cable. Both will eventually arrive at the digital tuner. Although increasing the signal level could help by improving the carrier to sound ratio, impulse sound is often greater than the wanted signal.