How does DTH Work?

DTH stands for Direct-To-Home, its a system that allows you to have a personal dish antenna how cable operators do, except its much smaller in size, the antenna can be seen on the top left corner of the blog.

This antenna can be fixed on your terrace and receives transmissions directly from a satellite, hence it is called as a direct to home service. 

How does DTH Work?

In simple terms the service provider broadcasts the signal that is sent to the satellite that then transmits the signal back to earth which is picked up by your dish antenna and fed to your television set.

How is DTH different from Cable TV?

Direct to home is different in the way of size of the antenna require is much smaller, the city will have less wires from one building to another you have the flexibility of moving without changing ot searching for new cable operators. You do not have to deal with the local cable operator!

The DIRECT TO HOME Satellite Broadcast system enables viewers to receive many channels of high quality TV programmers via high powered KU-BAND satellites.
There are no distribution cables but the receiver connects through MODEM to the customer’s telephone line for communication with the subscription service computer for billing purposes.

Thus, the DTH system does not need a cable network that at present distributes TV signals to customers. From economical point of view, the data should be compressed till significant digital drawbacks appear. As such, programmers containing frames with many fast moving objects, such as in a game of basket ball, can be compressed 3 or 4 to a transponder of 36MHz channel width. Similarly programmers containing mostly large still images can be accommodated to about 5 to 6 to a transponder.

For DTH service, KU-BAND frequencies are preferred because these are not prone to interference from ground point to point communication and also need much smaller diameter dish antenna. Low powered KU-BAND satellite transmits in the 11.7 to 12.5 GHz range while the new high powered versions are assigned 12.2 to 12.7 GHz band for a video efficient operation of DTH transmissions. Access (Smart) card slot accepts the smart card. It is a credit-card sized device which on plugging in the slot allows the decoder to receive authorized programming