DTT signal availability close to 100% with high levels of stability in 2016

In 2016, the digital terrestrial television (DTT) signal had service availability values close to 100% and a high level of service stability, according to a study conducted by ANACOM based on the information obtained from the network of probes scattered throughout the country. Overall, it can be said that in areas of the country where the digital television signal is provided terrestrially, television reception was provided almost entirely constantly and without interruption.

Overall, in aggregate terms, the districts with the highest levels of service availability were Guarda, with the longest television service reception time, 99.96%, then Faro, with 99.95%, and Viana do Castelo, with 99.94%.

Aveiro, with 97.06% service availability, Leiria with 98.56%, and Porto with 99.22% were the districts reporting the lowest results. The performance of all other districts was above the national average (99.37%).

In the twelve months of 2016, the DTT network reported the best performance in January, with a service availability of 99.77%, while July recorded the lowest rate of service availability, 98.83%.

As for service stability, 2016 was characterized by a high level of service stability.

The months with the highest and lowest service stability were December 2016 and July 2016, respectively (atmospheric changes occurring with the onset of summer cause some signal instability). The days with highest and lowest levels of stability were 3 December 2016 and 8 June 2016, respectively. Nevertheless, even when the signal is less stable, the majority of users may still not notice any change.

Over the year, the time of day when the network was most stable for DTT signal reception was 12.00 (between 12.00 and 13.00), whereas the worst time of day, albeit with high service stability, was 1.00 (between 1.00 and 2.00).