Pur this in Value: $#NCSIG#<17?#NCSIG#$
Put in Min: 0
Pur in Max: 12
Then in Value for Block put 3.
In Italy with operator 3 Italia work perfectly, because the possible value are: 1, 4, 8, 16 and 99 for no signal, so the first block is for 0, 1, 2, the 2° is for 3, 4...