What does DTH mean?

Answer 1

Medically it is Delayed-type Hypersensitivity, an allergy test.

It is also an abbreviation for "Direct-to-home" when referring to Dish TV broadcasting, Detroit Edison class "H" stocks, and the airport code for Death Valley, California. Since this was originally posted in "Graduate Degrees", I have no idea if any of these is the answer you were looking for.

Answer 2

how does DTH network work, tell me its tec-q

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.

A DTH service provider has to lease Ku-band transponders from the satellite. The encoder converts the audio, video and data signals into the digital format and the multiplexer mixes these signals. At the user end, there will be a small dish antenna and set-top boxes to decode and view numerous channels On the user's end, receiving dishes can be as small as 45 cm in diametre.
DTH is an encrypted transmission that travels to the consumer directly through a satellite. DTH transmission is received directly by the consumer at his end through the small dish antenna. A set-top box, unlike the regular cable connection decodes the encrypted transmission.