If you are using a TV aerial then you will have noticed the differences between the analogue reception and digital reception. Digital has a wider field of view, decimal points for the channel numbers and the need for a DTV converter, etc. The other difference is the digital Worthing TV signal.
Analogue vs. Digital TV signal:
If you had identical broadcasting conditions, the digital TV signal will not go as far as the analogue signal does. The reason is, terrestrial blockages such as hills, tall buildings, trees, wind, etc., have a greater effect on a digital signal. Actually, a digital signal can be disturbed by something as simple as a person walking between the transmitter and the receiver, the TV set. This is not something that will have any effect at all on an analogue signal.
To ensure a good digital Worthing picture, you need a good strong signal entering the TV via the tuner. It makes no difference whether the tuner is a part of the set, or a digital converter box mounted on the receiver. The only problem with digital TV is signal loss.
Whatever causes the interruption is not an issue; the issue is to enhance the signal, and this can be done with an amplifier.
Will you need amplification?
For any amplifier to work, you must first have a signal of some sort reaching the aerial. If there is a signal, then amplification should improve the signal, if you are not receiving any signal, then you will have to replace your aerial with either a satellite or cable TV service.
Try to troubleshoot the reception issues:
Many people split their digital signal when they receive it. If you have multiple TV sets, and you are attempting to watch two different channels through the digital converter box, you can expect poor reception. Splitters as they are called, reduce the strength of the signal, it is not as strong when it leaves the splitter as when it is received into it. Amplification may be the solution if you are using multiple sets through a splitter.
Check the coaxial cable that comes from your outdoor aerial to your TV set. This coaxial cable can have signal loss which is called attenuation. If your coaxial cable is RG59, change it to RG6, which has lower signal loss. When you do change to RG6, it is suggested you use quad-shielded, and that you change your connectors to high end gold plated versions.
It is possible that the source of the problem is the aerial itself. There are poorly constructed aerials that are at least 50% less efficient than a high-quality product. If you have a quality aerial then determine exactly in which direction it should be pointed, this direction can be gotten from a local dealer.