Modern technology is able to amaze even the most experienced users. Few people manage to follow all the latest developments in technology and. In particular, the development of televisions is especially difficult to keep track of. Just yesterday, in order to set up TV broadcasting on such a device, it was necessary to supplement the TV with various antennas and receivers.
DVB S2
All this thanks to DVB-S technology, which allows the user to do without special consoles.
In other words, DVB-S is a special module that is already on the TV and allows you to receive and decode satellite signals. Naturally, to receive information from a satellite, a special antenna is needed. In most cases, receivers of a certain company come with this antenna, which immediately offer their services. However, using the DVB-S module, the user's TV is able to receive and process signals directly, without additional consoles.
Initially, the term DVB means a built-in receiver that allows you to receive various kinds of information. Such devices are divided according to the type of received signal.
- DVB - T2 broadcast (such broadcasting is carried out via radio transmission)
- DVB - C wired (signal is transmitted to the TV via cable)
- DVB - S satellite (signal is received and decoded from a satellite dish)
In this article, DVB-S will be considered since this is the most advanced technology that allows processing information from a satellite dish.
Almost all new TVs are equipped with this technology. However, do not assume that DVB-S allows you to play all channels for free and in high quality. Most satellite signals from the broadcast network are subject to special coding, and there are not many unprotected channels. To ensure a comfortable viewing, the user should purchase a separate CAM module. This device comes with a specific operator’s card. This card is placed in the CAM - module, and that in the corresponding connector on the TV. And after that, the user opens the reception of many channels. However, only the channels of the operator whose card was purchased become available.
But even such advanced technologies do not stand still, and at the moment DVB-S has been replaced by DVB-S2 technology. The difference between these modules is the way they work. All TV channels that come to the antenna from the satellite are in a compressed state. This is necessary to save the frequency spectrum and ensure electromagnetic compatibility between various emitting and receiving devices. Since various information is very close to each other on the frequency grid, in order for the device to receive the selected signal, special coding is used, which allows you to process the necessary information and not process other signals.
In this case, the device faces limitations in signal processing, because in addition to the simple conversion and output of the signal to the monitor screen, the receiver must decode a special combination and "select" the desired signal from the set of information. That is why stable image transmission in HD format was previously impossible. However, DVB-S2 came to replace DVB-S, which allows you to speed up decoding and processing of received signals, which allows you to increase the resolution and quality of the received picture.
Attention! Encoding methods for DVB-S and DVB-S2 formats are different. Therefore, DVB-S will not be able to receive signals from another.
Televisions that have a DVB-S module and TV devices that do not have this module do not differ in appearance, so the availability of such technology should be checked with the seller or in the instructions.
From the side, the module looks like a regular card slot. Which is usually located on the side of the device. For the full use of this connector, in addition to a special satellite operator card, you may need a CAM module, into which this card is inserted.
If you disassemble the panel and look at the DVB-S device, the user will find the connector from the card, which is connected by a cable to several microcircuits on the board. On the other hand, in the presence on the device there is an input into which a satellite dish is connected. Microcircuits are needed to decode and process the signal that comes through the satellite dish. From the card slot, the sequence received by the chip is needed to decode the satellite signal.
Typically, the DVB-S module can be found on the back of the TV, because it must have two connectors. One for the operator’s card, the other for the antenna. However, there are TV models in which this module is located on the side. To find the location of this device, just find the connector for a special card or input for a satellite dish.
DVB-S technology allows users to receive satellite signals without having to connect a receiver to the antenna. In other words, the DVB-S module is the receiver that is already in the TV panel. DVB-S2 is an improved and more modern technology that uses a new encoding method. This method allows not only to place several information signals in one band of the frequency spectrum, but also to accelerate their processing, which allows for a high information transfer rate per unit time.
The main advantage of the new technology, in addition to the transmission speed and the ability to process more information, is the simultaneous increase in the information flow and the preservation of the size of the frequency spectrum. This allows you to increase the quantity and quality of transmitted information, while maintaining the frequency resource, which is currently a very important factor.
For a simple user, DVB-S technology is useful in that it avoids unnecessary expenses when buying a separate receiver. With this module on a TV device, the user does not need to purchase a special console in order to use satellite TV technology. It is enough to simply connect the satellite dish to the TV device and "open" channels are already available on it. In order to gain access to a larger number of broadcasts and channels, a card should be purchased from a satellite television operator.
Many users who have acquired the DVB-S and DVB-S2 technology have connection problems. Therefore, there will be detailed step-by-step instructions for connecting and configuring DVB-S.
- The first step is switching the satellite dish and the TV. This is done using a special cable that needs to be connected to the connector on the back of the TV. Usually there is an inscription “LNB Satellite IN” above this port, however, it may differ in different models.
- After connecting the antenna, go to the TV settings. Select "Channel settings" or "Channels" and press the "Auto search" button. Then on the screen you will be able to select a signal source for channel search. The user needs to select Satellite and click "Next".
- Next, the user needs to select the desired satellite. In order to change the settings for connecting to the selected satellite, click on the "Change satellite settings" button, then manually enter the parameters of the required station.
In order to independently configure the connection to the satellite, you need to know such parameters as the LNB frequency, the type of the Transponder and the DiSEqC parameter. You can add your own satellites.
- After the satellite setup is completed, the user is offered several search methods. If the CAM card is not connected to the module, then it makes sense to check the box "Skip encoded / encrypted" channels. It is also possible to use the so-called "Blind search". In this case, the search will be conducted over the entire frequency range. This option can increase the search time, but the likelihood of finding a quality signal increases.
- After setting the desired search mode, click the "Run" button, after which the device will begin to scan the satellite and search for channels available for reception. During such a search, statistics will be displayed on the screen, which displays the progress and the number of working channels, both TV and satellite radio. You can interrupt the search, after which the scan will stop, and all new channels will be recorded and ready to be watched.
After the scan is completed, you can proceed to viewing or to manually tune the found channels. Tuning consists in the ability to sort, search for a satellite or edit a transponder.
In the event that the user needs to exit the satellite TV viewing mode and switch to the HDMI connector or watch cable television, on the remote control, press the Source (or Input) button and select the appropriate item.
Summing up, it should be said that the DVB-S technology is the most convenient and promising among satellite consoles, as it is directly integrated directly into the TV device’s case, which allows users to avoid unnecessary purchases. And also it is easy to learn and there is no need to configure it for a specific TV model. The DVB-S2 module differs from the previous generation in the ability to process satellite TV in HD format.
The user should remember that buying a TV with the DVB-S module will not allow him to enjoy all the channels of satellite TV for free. Each operator exposes its channels to encoding, which makes it impossible to view them without a special CAM card. Often, various types of events are held in household appliance stores, which allow you to get an operator’s card complete with a TV with DVB-S technology.
Also, with the purchase of a TV device with a DVB-S module, the user no longer needs to worry about timely updating of the receiver or its firmware. Also, he will not be afraid of various kinds of technical and preventive work that often occurs with domestic operators.
It is believed that DVB-S provides a much worse image than a separate receiver. On older models, perhaps this was true, but on modern TVs that have a DVB-S2 module, the picture is not inferior in quality to ordinary external receivers. This puts users of TV devices with this technology in a winning position.
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