Often, going to the store to buy a new TV, buyers consider such technical characteristics as image quality, sound and signal perception power. This misses an important feature in the form of a digital receiver. In the future, if you want to connect a DTV, there are difficulties associated with the acquisition of a new device. To avoid these problems, in the future we will consider a digital receiver, its types and principle of operation.
In the early 2000s, the federal program “Development of Broadcasting in the Russian Federation for 2009-2015” was launched in Russia, which caused the population to switch to digital broadcasting. The new DVB T2 multiplex allows you to expand the number of channels, increase the network resistance to interference.
The principle of operation of the receiver
In order to begin to understand the types and differences of decoders and solve the question of which dvb t2 prefix to choose, one should understand the essence and principle of operation of this device and the difference between a digital signal and an alternative one. An alternative signal comes from the tower to the TV through the antenna and its quality depends on the distance to the supply source and interference. With a digital signal, the quality is an order of magnitude better, but if the device does not capture it, the image will disappear, it will require amplification through the antenna. A greater number of channels are offered, operator services are faster, the ability to compress the signal using special algorithms (MPEG-1, MPEG-2, MPEG-4).
Thus, a new generation decoder captures the standard of digital broadcasting terrestrial digital television. The device converts it upon receipt from a satellite dish and outputs it to a personal computer. The main element of each receiver is the main processor, which is responsible for receiving, transforming the signal, outputting a digital image and storing the required information in memory. It should be noted that the hard drive is also one of the key components of a digital device.
The specified model is one of several that includes a group developed by the interstate association DVB Project. Initially, DVB-S (a more modern DVB S2 model) was developed, which transmits digital television channels. Thanks to this device, there is no need to buy and tune a satellite dish and tuner, provided that a new model is supported. In order to connect to the signal you need to buy a CAM conditional access module and place it on the TV. Then connect the satellite dish and catch the channels through it.
DVB-C (the modernized DVB-C2 model) is a cable type of digital television. The specified form of digital broadcasting can provide viewing of digital type channels that are provided by the cable provider. From this it follows that, apart from analogue channels, the provider has the ability to simultaneously provide channels in digital quality. To perform this function, you do not need to purchase additional equipment, since most modern TVs have a built-in digital DVB-C standard. We must not forget that there are cable providers whose digital channels are encrypted. A condition for viewing them is to purchase an access card.
From all of the above, it follows that the DVB technology family includes several types, each of which has advanced modifications. The division into new and old models has its own objective justification.Devices installed on older televisions, as a rule, do not support their updated prototypes, which makes it necessary to buy a set-top box. In this regard, we can highlight certain advantages of equipment that supports various standards. First, save money, as there is no need to buy a new receiver. Easy handling thanks to one remote control per TV and digital set-top box. Save space in the house due to the unnecessary place additional equipment.
The DVB - T2 format set-top box market has its own structural division into devices with advanced functionality and their budget models, which makes it difficult to select a dvb t2 set-top box. Low cost receivers include BBK and Oriel. More functional models with high quality differ in price and many other subtleties that you should pay attention to when buying a product. These include: the level of digital signal reception, operational features when adjusting settings, remote control ergonomics and supported codecs. Next will be considered the models that are most popular in the market of digital decoders.
Top 5 dvb t2 digital set-top boxes
Supra SDT - 94
The device has a stylish design and convenient shape. It directly performs the functions of receiving a high-quality digital signal, has the following functionalities: to record television programs on a USB flash drive, play video files from USB media. Can support HD resolution. To transmit the signal to the TV, you must use the HDMI jack or composite output. When connecting through the composite output, you may experience problems playing channels. When switching channels, the remote control must be directed clearly to the IR receiver. The parental control function allows you to restrict children's access to unwanted channels by setting a password.
Supra SDT - 94
Main advantages:
- Budget cost;
- Good signal support;
- Simplicity and accessibility of the signal;
- Equipped with HDMI output.
Disadvantages:
- The need to aim every time with the remote control at the IR receiver to switch the channel;
- There may be interference with the image when connected via composite output.
Rolsen RDB - 532
This model is primarily used as a car receiver for digital television broadcasting. This tuner can be placed anywhere, to switch channels it is required to install its IR receiver. Although the list of standards supported by him is limited, recording can be performed. The specified model has a USB connector and can play multimedia content when a USB drive is connected.
Main advantages:
- Ease of transportation due to small weight;
- The entire arsenal of key functions is being implemented;
Disadvantages:
- When connecting via USB, you need a source with a current of at least 1 A;
- Relatively high price.
Oriel 963
The user does not have to have a wide range of knowledge in order to understand the settings of this model. Therefore, even housewives can install and connect it. The design is distinguished by coating the base and cover with a metal plate. The display, which is located in the center of the panel on the front, is quite bright. It reflects switchable channels, and in the background the clock. Oriel 963 is based on an inexpensive but highly functional Ali M3812 chipset and a tandem from Sony, which includes a sensitive tuner and demodulator. This allows, in addition to the indicated high quality and image and lack of interference, to expand the list of functionality. After reading the instructions for use, you can see the possibility of multi-viewing. This implies parallel playback in the background from 5 to 9 channels, in order to transfer the channel to real mode, click on it. It is worth noting the quite logical structure of the main menu.Settings allow you to search manually or using auto search. When you enable the delayed viewing mode, you can pause the airtime.
Oriel 963
Main advantages:
- Good level of sensitivity;
- Low price;
- Case made of metal;
- Accessibility of settings to the ordinary user;
Disadvantages:
- The metal coating is subject to heat over time.
D - Color DC1302
This model supports AC3 codec to play sound with a wide variety of video files. It is characterized by ease of use and clear reception of a digital signal. The advantage of the remote control is that a high level of sensory sensitivity ensures stable channel switching. Excellent picture quality of HD TB and HD video files is achieved by installing outdoor or indoor antennas designed to amplify the signal. The prefix is made of quality materials: processed plastic, which does not give off an unpleasant odor and a case covered with metal plates. You can also specify the following as characteristic features: a simple menu and a set of settings, saving all the set parameters for channels when the device is turned off, and there is no overheating problem
D - Color DC1302
Main advantages:
- Price;
- Support for HD - format and NEA when playing video clips;
- Strong case.
Disadvantages:
- The cord for connecting to the network is short;
- Switching channels takes 2 to 3 seconds.
Icon Bit XDS 94 K
The list closes with one of Icon Bit's leading models. The basis for its operation is the platform Amlogic S905. The advantages of this platform in a powerful quad-core processor and flash memory providing extensive resource volumes for launching multimedia applications of various kinds. The player of this model is distinguished by the ability to work with colors up to 10 bits deep. An important plus is the function of connecting external information resources. The built-in four USB ports cause the connection, the same number of devices. When viewing content in the IR standard over a network, you can use the connector to connect to a gigabyte network. To do this, download the movie to a personal computer and use Gigabit Ethernet. An important feature was the connection to a wi - fi network, while the picture and sound quality were decent. When using a smartphone located in the area of influence of a 4G network or a modem, the relevance of using ordinary antennas or satellite television is reduced. The stylish interface is combined with additional widgets containing information on weather conditions, date, network connection. At the same time, processor power allows you to perform several tasks, and users give positive feedback.
Icon Bit XDS 94 K
Main advantages:
- HDMI version 2.0;
- Performance processor;
- Wide functionality.
Disadvantages:
- Relatively long download;
- High price.
