Ok thank you my home is not roof so I can't go up and I have already tightened the connector of coaxial cable and I found that the length of the central conductor was long than 2mm so I cut the copper conductor and I accidentally bend the copper conductor and at last I picked plier and adjusted the bended conductor to straight and connected it to the stb and tightened the connector with wrench it's working fine now
But before rain about 2 minute before the signal will not be received , I don't know why it is happening , is this normal