Thanks four your valuable inputs Mr. Rahul and Mr. Jagan.
Yes, we use single antenna in our block, the problem maybe due that. There are many switches, amplifiers, routers etc. kept in each floor connected to the dish. Still, they are taking time to rectify this and asking for a day or two to fix. Lets see.
We call it as MDU dish and MDU users are not charged for any of the visit they do for any service, only subscription charges.
yes bro I also think so but as rhariraj bro is saying that after realignment and changing of box he is getting no signal error that's why I am little bit worry.