Digital TV will almost always produce "perfect" pictures and sound.
However if the signal quality (enough signal and a freedom from reflected signals) is not sufficient you will get the following;
- An internally generated no signal sign
- Picture breaks up into blocks and the sound goes silent. When the sound mutes it often makes a loud chirp.
- The above effect can occur when electrical devices including power insulators in the street arc. So when washing machines, air conditioners etc internally switch the above effects.
- Rain particularly on tile roofs can also reduce the signal to give the above effects.
- Metal roofs and concrete reinforcing stops TV signals, so the antenna must be near an outside wall.
- People and objects can vary the reflected signals causing problems.
One of the main reasons people are forced into indoor antennas, is that they try and use an antenna socket in an apartment. Master Antenna TV systems usually only amplify the channels required. Digital TV uses different channels to prevent interference and these are not necessarily amplified. For Master antenna (one antenna for many units) in which you cannot get all your digital channels it need to be upgraded. They should be upgraded to . The building management will have to do this.