Digital television allows us to be more efficient and enables us to bundle a number of television services together into what is known as a multiplex. Each multiplex can then be broadcast from a satellite using an individual frequency. Your television or set top box can then pull out each individual service from the multiplex and allow you to access it.This allows a number of multiplexes to be transmitted from each satellite and a wider range of services to be broadcast.
The term transponder is often interchanged with multiplex. This is technically incorrect as a transponder is just a set of equipment that operates at a particular frequency and both receives and re-transmits the multiplexed services.
Whichtransponders does the 鶹Լ use?
For satellite, the 鶹Լ utilises a number of transponders on a number of satellites. The satellites are arranged in such a way thata correctly- aligned satellite dishwill be able to receive signals from all the satellites in that specific arc.
We keep an updated list of the 鶹Լ TV services and the satellites/transponders.
Why do we use multiplexes?
Using a multiplex enables us to broadcast a number of television channels at once using just a single frequency. This allows broadcasters to use the spectrum allocated to satellite services to the maximum extent, giving you more television services to choose from. We can also add in radio services, Red Button data services, subtitles and audio description into a multiplex. Each multiplex also carries the service information which includes the data needed for EPG’s.
Reception Problems
If you have a reception problemwith one service in a multiplexyouwill also have problems with all the other services in that multiplex. There is also the possibility the signal strength and quality of one multiplex could be different from another. This could be due to the different frequencies used, or if services are on different satellites. See our guide on Satellite Reception for more information.
