First, let's define the tuner.In order for you to watch TV, your TV needs a tuner. This is a device that receives a radio signal, which later becomes a picture. Also, the TV tuner is still needed to decode the signal, to correct errors, and in some cases also for reformatting.
Tuners are divided into two types:digital and analog. The analogue tuner receives a normal broadcast signal, where the image quality is not always good, with the digital tuner on the contrary - the picture quality is ideal. You can see even the smallest details without any distortion.
In addition to the built-in, an external TV tunerfor the TV, which has a number of advantages. For example, you have a TV and a computer, and you do not expect that they can be combined. That is, watching movies on the Internet in real time, entertainment programs, etc. on the TV. What should I do to get a high-performance device that will outperform the most modern TV? Connect an external tuner to the computer, then a special cable from the TV.
I think you understand what a tv tuner is, and the principle of its operation.
Now let's talk more specifically about tuners,first about analog. Such tuners receive a signal from the TV tower and then convert it. You can watch TV shows in PAL and SECAM formats, you can set the scale of the picture. You can also watch and record video via the dedicated S-VIDEO input.
A digital TV tuner may beseveral species. Basically, they are divided by the type of screen resolution. This is HDTV, SDTV and EDTV. The tuners SDTV and EDTV can not be considered yet, since we did not have digital TV, but on HDTV it is worth paying attention.
Now everywhere is widespread cableTV. There are a lot of programs, it reaches a hundred channels, the picture is good, if not excellent. And all because of what? It's simple. HDTV tuners are designed not only for receiving HD-signal by home antennas, in cable television they serve as a storage device, or a receiver.
If you want to view only the cableor satellite TV, you do not need to purchase a TV tuner. The fact is that almost all peripheral video equipment already has a built-in tuner.
В мире существует несколько стандартов цифрового broadcasting. Therefore, a TV purchased in another country, for example, in Japan, in Russia will not work properly. The broadcasting format does not fit in with the European one. That's why you need a tuner for your TV. As mentioned above, an external TV tuner for TV is just right. You do not have to disassemble, re-solder, just connect and select the necessary TV broadcasting standard.
In our country, not everyone has a modernTV. Quite a lot of people who do not have the opportunity to buy it. Therefore, the production of TV tuners that accept the analogue signal of the PAL system (European standard), SECAM (French and Soviet broadcasting), NTSC (America and Japan) continues.
At present, hybrid tuners are available in Russia, which can receive both analog and digital signals. And purely analogue, as such, from production disappeared.
The difference between the standards of analogBroadcasting is the screen resolution and frame rate. Digital TV often encodes some channels, so some tuners have a built-in decoder for decoding. This applies to paid channels.
In mass sale there is basically a tunerfor a TV without additional options, so it is suitable for viewing only free channels. By and large, these channels are more than 60, so tuners with a decoder do not buy everything.
