What is a multiplex in television

What is a multiplex? The word "multiplex" is English borrowing, in the original language literally meaningful "multi-component, complex". This word is called, for example, a modern type of cinema: a lot of halls simultaneously broadcast different films, but they usually have less roominess. Also, the multiplex usually includes entertainment facilities such as a billiard room. This article considers this term in the field of television.

Multiplex digital TV

A digital multiplex is a set of channels that are transmitted on one frequency. In Russia there are as yet two multiplexes, the third will soon be available, but paid.

The first multiplex is available in all cities with digital TV. Not all towers are ready for the second one. Broadcasting itself is free. The necessary equipment is a receiver and an antenna, both with support for DVB T2.

First of all, digital TV is available almost everywhere. But all the same they often use only the first triplex. The terrestrial digital TV depends on the proximity of the transmitting station as well as on weather, terrain and other physical obstacles. The ether television reaches where the cable wire (caravan, car) is unavailable.

Differences between terrestrial TV and cable

What is a multiplex can be understood by comparing itwith cable TV. Cable digital TV differs from the on-air number of channels and, in fact, the lack of that weather dependence, which is available for the air version. And the availability of prices. But the main advantage is the cost. You can do with your own tuning and often the old antenna (depends on the proximity of the transmitting station). Many modern TVs have a built-in DVB T2 frequency receiver. The equipment is inexpensive. All major channels and even more the consumer gets for free.

What is a multiplex in terms of image? The picture is of high quality. No interference, in principle, this is the feature of digital broadcasting. But the stop or temporary friability of the picture (all this is called the word "frieze" - from the English "frost") is still possible. The reason for this phenomenon lies in the weather or in insufficient signal power. The connoisseur HD is disappointed: not all channels are now broadcast in HD, as well as old movies. In any case, the quality of the second multiplex is standard, but high.

The width of the picture may vary with the channels. Thus, the picture can be stretched in height, cropped or at best have frames. This problem occurs when using modern TVs. Several problems can be corrected by setting the TV or digital set-top box.

What equipment is needed?

Usually, additional equipmentrequired: a certain cable, a prefix, an antenna. The antenna is the most common - probably there is no need to purchase a new one. But it should take in the decimeter range (decimeter antenna).

In this respect, the "figure" is unpretentious: sometimes it can be caught either on an ordinary cable or on a public antenna. From the proximity of the station depends on whether you need a room or outdoor antenna, sometimes reinforced.

The DVB-T2 receiver can be built-in to the TVeither via the Internet. For example, the Rolsen RDB-507N receiver model is easy to use, has all the necessary features, has no drawbacks. Models Mystery MMP-71DT2 and BBK SMP127HDT2 are also suitable.

How the "digit" is connected

To understand what a multiplex is, you need to know,how it connects to the TV set. The antenna is connected to the receiver, and the latter is connected to the TV, and preferably via an HDMI cable, which guarantees even higher quality. Connection diagram is available in the instruction manual. Before installing the antenna, you must turn off its amplifier, if any.

The next step is automatic searching. It is simultaneously at once on 10 channels, for the whole process takes some time. If the automatic search did not find all the channels of the multiplex, you need to use the manual option. Regardless of the frequency of the nearest tower, it is necessary to try to catch the signal precisely from it.

The power and quality of the signal are also checked. It is carried out by a triple click on the receiver of the Info button (or another name). From 60% and above - the optimal value for both indicators. For each multiplex, the indicators vary, because they are transmitted by different stations.

The "No services" notification appears at a lowpower. Automatic search for such a signal simply ignores. Can help manual search or fine manual tuning of the antenna. If the signal quality remains the same low, you'll have to deal with the antenna, there are several options: an external antenna or with an amplifier, as an option - raise it higher.