Path "numbers" from the source to the TV
CONTENT
- 1 Classification of antennas, what is the difference between passive and active
- 2 What to choose and what are the selection criteria
- 3 What is the free digital TV, and how to connect to it
- 4 The principle of operation of the antenna UHF range and its technical specifications
- 5 The cost of popular models and where they are implemented
- 6 Antenna "Aerial 2100" - true or divorce
- 7 Reviews of TV antennas, as a key for free TV
- 8 Video. How to select and connect an antenna for reception of digital TV
Classification of antennas, what is the difference between passive and active
A television antenna - a maintenance unit for receiving the TV signal transmitted from the television tower located in the zone of the relay.
TV antennas are classified according to the following parameters:
- Placement: indoor and outdoor;
- operating frequency range: channel, and all-wave range;
- the type of signal amplification: passive and active.
passive
Devices of this type perform reception and amplification of the received signal due to its design, expressed in the form of geometric and marketing materials used in their manufacture.
Passive antennas are room and outdoor installation.
In this type of device, there are no electronic components (transistors, integrated circuits, etc.) affecting the received signal that is reflected in two ways in the last.
IMPORTANT!(Click to see)
The antenna is a passive type of room design is used when placed in close proximity transponder and in the absence of high-rise buildings (higher than ten meters) arranged in the direction TV tower.
Lack electronics does not create interference and noise in the TV signal received by the television receiver, however, uncertain zone reception apparatus of this type may be ineffective. This is expressed as in providing quality signal, and in the possibility of using, in principle.
Room passive antenna
active
Antennas of this type can also be indoor or outdoor type of execution. They have in their design electronic amplifier, providing the received signal strength.
amplifier operation is ensured by applying a voltage on its power supply by means of contacts.
The presence of the amplifier makes it possible to use the TV in the zone of uncertain reception of TV signal, which is an advantage of this type of antennas.
In the case of using a reception coverage area, interference may occur and sound broadcasting image that is a drawback of this type of device.
Similar drawbacks may be caused by using of antennas equipped considerable power amplifier and low-quality making them.
Indoor active antenna
Classification of the operating range of frequencies
On the antenna index are divided into several groups:
- ducted - able to operate only in a predetermined frequency range;
- range of - operate in the VHF or UHF bands;
- vsevolnovoj - able to work in the UHF and VHF bands simultaneously.
What is the set-top box for digital TV and how to choose.In a special publication of our portal, we describe in detail what is the prefix for digital television and how to choose. You will learn the basic features and recommendations on the choice.What to choose and what are the selection criteria
Which antenna is needed for digital TV, and how to choose - these are the issues that face the user, especially when it comes to a country house or villa. This is especially true if the house is located far from the repeater.
Vsevolnovoj active antenna outdoor installation
In order to properly select the receiving device, it is necessary to determine the criteria on the basis of which will be the choice.
This may include the following indicators:
- Specifications:
- signal power gain (measured in decibels) - shows how many times the signal voltage at the device-specific output higher than the output when the corresponding half-wave vibrator placing;
- efficiency - determines the signal power loss.
- The distance to the repeater.
- The presence of the nearby location of tall buildings and structures.
- The presence of technical objects, interfering the reception signal (transmission lines, high-frequency line, etc.).
- Landscape location (mountains, gorges, etc.).
- Location in relation to the high objects and terrain.
Types of antennas for the reception of digital TV
IMPORTANT!(Click to see)
When you first turn on the antenna is to be done without a power amplifier, and if the image is of poor quality, only in this case it is necessary to connect it.
Antenna for digital TV with an amplifier - key to successful watch TV programs in high quality audio and video, even in remote locations from the broadcast source.
What is the free digital TV, and how to connect to it
To receive terrestrial digital broadcasting antenna required UHF band allows you to receive free channels in digital format.
In Russia a free digital TV broadcasting is broadcast in DVB T2 format for public access channels Multiplex Multiplex-1 and-2.
Each multiplex includes 10 channels:
- Multiplex-1- First Channel and Russia 1, Match TV and NTV, Channel Five and the Russian "Culture", as well as the Russian 24, Carousel, OTP and TVC;
- Multiplex 2 - Ren TV and Savior Orthodox channel, CTC, Home, TV 3 and Sport + Friday, as well as stars, the world, TNT and Muz TV.
Multiplex-1 operates on the whole territory of Russia, where there is a digital broadcast, and a multiplex-2 - only where appropriate equipment is installed.
DVB T2 format - a high quality broadcast without monthly fee
TV antenna UHF-band - is the key to free TV format DVB T2 multiplex of channels 1 and 2.
The principle of operation of the antenna UHF range and its technical specifications
The operating principle of this type of device can be summarized as follows:
- vibrator (Active part of the device) - is under the influence of electromagnetic field and the terrestrial signal is in resonance at its frequency, whereby an electromotive force (emf);
- reflector (Passive part) - it is also under the influence of an electromagnetic field, which also leads to the EMF;
- secondary electromagnetic field re-emitted and suggest additional EMF on the active element;
- all summed EMFAnd the signal is passed on via a connecting cable to a connected receiver.
Antenna "DELTA"
When buying a UHF-band antenna is necessary to pay attention to the following specifications are reflected in the passport of the device and determine its use features:
- antenna type (active / passive);
- broadcast bands;
- gain in dB;
- protective action factor, dB;
- dimensions;
- placement;
- the weight;
- materials used;
- supply voltage (from the active model), V.
The cost of popular models and where they are implemented
In the market of the technical devices used for receiving digital broadcasting, presented a large number of models, differing in design, style, quality and value.
The most popular ones are listed in the following table:
| Picture | Model (country of origin) | Rating according to the editorial Tehno.guru, points | Focus | Cost, rub. |
| REMO BAS-5310USB HORIZON (Russia) | 9,7 | Best cost. | 850 | |
| HARPER ADVB-2120 (China) | 9,7 | The ratio of "price-quality" among the indoor units. | 570 | |
| REMO INTER 2.0 (Russian) | 9,5 | Best desktop model. | 870 | |
| REMO Kolibri-A-DX DELUXE (Russia) | 9,9 | The most popular devices outdoor installation. | 1299 | |
| REMO "Dvina-DX» (Russia) | 9,6 | The ratio of "price-quality" among street devices. | 510 |
Antenna "Aerial 2100" - true or divorce
"Aerial 2100" model was a novelty in 2017 and presented by the manufacturer as a technical device Japanese quality, ensuring reception of domestic and overseas digital broadcast channels at any point our country.
The distinctive features presented: compactness, ease of use and low cost.
Currently, according to user feedback, this model is classified as not justified by the stated characteristics and not popular.
Reviews of TV antennas, as a key for free TV
At the beginning of this section shows the reviews on popular models discussed in this article and posted on the website Otzovik.kom .:
"REMO BAS-5310USB HORIZON».
User - ivana2211, city Cherepovets:"Confidently perform its basic functions. Advantages: low cost, compact, easy to use, appearance, self-acceptance in the depths of space. Minuses: not noticed. "
In details: http://otzovik.com/review_5560558.html.
«HARPER ADVB-2120."
User - Lern, city Moscow:"Great photo! Advantages: quality. Disadvantages: The surface of leaves stains and dust. "
In details: https://otzovik.com/review_4421572.html.
"REMO INTER 2.0".
User - Resvon, city Eagle:"A good antenna that performs all the functions that are declared by the manufacturer. Advantages: design, build quality, price. Disadvantages: no. "
In details: http://otzovik.com/review_2354037.html.
"REMO Kolibri-A-DX DELUXE».
User - AlekseyNr, city St. Petersburg:"To serve on a solid 4+. Advantages: manufacturing quality, compactness, completeness, low price. Disadvantages: have not found. "
In details: http://otzovik.com/review_474562.html.
About the model "Aerial 2100" also a lot of reviews, but they are of a negative character, here are some of them:
User - This x1, city Yaroslavl:"Complete nonsense! Advantages: what can be? Disadvantages:. Nothing but them "
In details: http://otzovik.com/review_4541399.html.
User - ptzrus, city Petrozavodsk:"Divorce suckers. Advantages: no. Disadvantages: cheating is not good. "
In details: https://otzovik.com/review_4981467.html.
User - victor-r, g Samara: "Conventional home antenna for receiving an analog signal from the television station. Advantages: no. Disadvantages: catches only the analog signal from the nearest TV tower, the signal on a TV with interference inside the antenna amplifier is no no. "
In details: https://otzovik.com/review_5459009.html.