Socket terminal sat tv. Pass-through connection

The main difference characterizing a television outlet from electrical outlet is the structure of the cable connected to the product. A coaxial cable consists of one solid core, enclosed in dense insulation with a screen of foil metal and thin steel wire, on top of which the entire structure is covered with an outer protective sheath of PVC insulation.

Important: the screen in a coaxial cable, also called asymmetrically shielded, has the function of protecting against high-frequency signals in the surrounding space. It prevents interference to which the signal received by the object is sensitive. Besides protective screen serves as a second conductor to ensure high-frequency current flows through the cable.

According to their functional purpose, television sockets are divided into three main types:

• single sockets, their resistance is characterized by an insignificant value of internal resistance;
• pass-through, installed in the middle of the loop, the cable is connected to these sockets on both sides,
• the final ones are characterized by a large amount of internal resistance;

Single sockets refer to simple type and are considered a common electrical installation product, used to connect a television receiver. The work is carried out through a splitter or crab from one antenna.

A pass-through socket is used to connect two or more TVs; the connection occurs by dividing the television signal for each TV. The operation of the product is based on the supply of one cable from the antenna, the other cable leaves the outlet and is directed to the TV.

The termination socket is used to terminate a multi-socket television network. Main characteristics The internal wave impedance is large, up to 75 Ohms, it is equal to the wave impedance in the television line, due to this, the negative impact of television receivers on each other is reduced, as a result, the quality of the television signal is improved, and the picture of the television image is improved.

Fig. No. 1. Front panel of the television socket

Operating frequencies typical for combined sockets

A television receiver (TV) operates at frequencies from 5 to 862 MHz.

Radio receiver ( FM ) its range is from 87.5 to 108 MHz.

Satellite television ( SAT ) from 95 to 2400 MHz.

Star terminal socket circuit - TV-RD-SAT, terminal or terminal sockets are used to improve image quality to get rid of interference, switching channels on one TV does not affect the image of another TV receiver.

Design features of television sockets

Modern TV sockets

Currently, designs for television sockets have been created that combine various functions– this is the connection of a television consumer ( TV) , radio points (FM) and satellite (SAT) receiver

According to schemes : TV— R.D.— SAT; TV— FM— SAT; TV— R.D., for three and two output connectors, a socket that includes an abbreviation in its marking R.D., performs the function of a terminal socket. Connection is carried out according to the “star” and “loop” topology

Features of television sockets

Modern TV sockets in their design imply the presence of a main spring or screw terminal contact for connecting the central core of the television cable. An auxiliary terminal (special bracket) is used to connect the shielding braid. Pass-through sockets have two pairs of terminals for connecting incoming and outgoing cables.

Modern sockets from Legrand, ABB and other European brands do not require additional preparation of the television cable when connected; just insert the bare core into the contact terminal and it will automatically clamp it, puncturing the main insulation and clamping the cable. The connection is very reliable.

Rice. No. 2. Connecting modern sockets.

Star scheme

The TV socket for this circuit is used with one input and multiple outputs for 2; 3; 4 exits. The input signal must have sufficient power to provide good television signal, otherwise the image of the latest television receiver will be of poor quality.

Rice. No. 3. Star scheme.

To amplify the signal it is used tv amplifier, which will provide an increase in signal power, it is recommended to install it next to the source of the television signal, directly in the distribution board or next to the entrance of the input television cable to the apartment.

Recommendation: during installation television circuit"star". You cannot lay outgoing and incoming cables next to each other, as interference may occur and the quality of the television signal will decrease. Star scheme best option to connect digital television. NV receivers are connected using a router, a function that can be performed by a digital splitter or hub. This could be a set-top box SD receiver CAM model; it is suitable for receiving an IPTV signal.

Scheme (pass-through) “loop”

The circuit uses series-connected feed-through sockets and a terminal socket. There is virtually no signal quality degradation in the circuit; the quality depends on the correct connection of the television cable to the F-connector. Using this connection makes it possible to connect three TVs from pass-through sockets and two more from a single (individual) and from a dead-end socket.

Rice. No. 3 Feed-through circuit for connecting television sockets.

The wiring of the “loop” and “star” circuits is carried out through a splitter, which serves as a separator of the TV and SAT signal into equal parts without loss of signal quality, and the splitter is also used as a signal combiner. In addition to the splitter, the TAP splitter performs a similar function; it divides the signal into several outputs. Splitters used for television receivers use operating frequency 1Hz, devices that perform a similar function for satellite receivers have a frequency of up to 2.5GHz.

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The TV socket is special device, which, depending on the specific type of structure, is capable of performing various tasks. In particular, using sockets you can connect a number of devices in parallel, increase the network area, etc.

Types of sockets

Stores of the Leroy Merlin retail chain offer their customers the following types of television sockets:

• Pass-through devices are equipped with an input and two outputs, one of which can be connected necessary equipment, and to the other - the next socket. When laying the network, it is necessary to take into account that each socket leads to the fact that the signal becomes somewhat weaker, and therefore the installation is too large quantity such devices are impractical. Pass-through models are needed in order to connect several devices at once; in most cases, they are operated in combination with terminal sockets.
• The terminal sockets complete the network and help improve the quality of the television picture, for which the characteristic impedance indicator is at the level of 75 Ohms.
• Individual sockets also complete the network, but do not have the same impressive resistance as their wave counterparts, which can cause picture problems.

Principles of selection and installation

When choosing an outlet, be sure to find out its operating frequency. Similarly, if you plan to connect to the product in the future additional devices, for example a modem, you should choose models with inputs specifically designed for this.

When installing a socket on a wall, it is better to use special boxes that reduce the mechanical load on the element and increase its durability.

Leroy Merlin offers wide choose goods by low prices for residents of Moscow, as well as the cities of the Moscow region: Balashikha, Podolsk, Khimki, Korolev, Mytishchi, Lyubertsy, Krasnogorsk, Elektrostal, Kolomna, Odintsovo, Domodedovo, Serpukhov, Shchelkovo, Orekhovo-Zuevo, Ramenskoye, Dolgoprudny, Zhukovsky, Pushkino, Reutov, Sergiev Posad, Voskresensk, Lobnya, Klin, Ivanteevka, Dubna, Yegoryevsk, Chekhov, Dmitrov, Vidnoye, Stupino, Pavlovsky Posad, Naro-Fominsk, Fryazino, Lytkarino, Dzerzhinsky and Solnechnogorsk. You can order the necessary products online with delivery to all these cities or visit one of our retail stores

Tsugunov Anton Valerievich

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Before you begin renovation work in your apartment, you need to plan the design of the future premises. An important aspect of this issue is planning the placement of furniture, interior items, as well as household appliances. First of all, this is due to the need to optimally route electrical wiring and install it in the right places, including television wiring. To properly connect a TV socket, you just need to know its structure, general principle work and installation procedure.

Coaxial cable device

The main difference that determines the difference between electrical and television outlets is the structure of the cable connected to each of them. If a standard electrical wire consists of two or three separate conductors covered with insulation, which are connected to the corresponding contacts of the socket using bolted connections, then the design of the antenna cable is somewhat different.

TV coaxial cable is very easy to identify by appearance. It is a fairly thick round wire, having inside one solid conductive core made of copper. This center conductor is covered with a dense layer of insulation, on top of which is a shield made of aluminum foil and thin steel wire. As an outdoor protective coating cables in most cases use PVC insulation.

Poor workmanship or damage to any of the elements antenna wire leads to a significant deterioration in signal quality, so the installation of such lines should be treated with the utmost responsibility.

Let's take a closer look at the device and purpose components TV cable:

1. Insulation. It is made of a dielectric (usually polyethylene) and serves to eliminate the galvanic connection between the conductor and the screen.
2. Screen. In any coaxial cable this element is designed to prevent high-frequency signals from being emitted into space. Another function is protection against electromagnetic interference, to which the transmitted signal is very sensitive. In addition, to ensure the flow of current high frequency two wires are needed, so in this case the screen is used as a second conductor. Such a cable is called asymmetrically shielded.
3. Conductive conductor. It is the main part of the structure, since it serves to transmit an electrical signal.
4. Outer shell, which is designed to protect live parts from mechanical influences.

As can be understood from the design of the cable, connecting it to a television socket involves connecting the central conductor and the screen to the corresponding contacts. To understand the features of connecting such wires, it is necessary to briefly consider the structure and purpose of the main parts of a television outlet.

It should also be noted that when laying the antenna cable, it should not be placed in close proximity to electrical wires.

When connecting electricity consumers, quite strong magnetic fields around the current-carrying cores of power electrical wiring elements. Such fields can significantly distort the transmitted high-frequency TV/SAT signal. In addition, some Appliances have the ability to emit electromagnetic waves, also affecting the quality of the TV signal. And although nowadays there are fewer and fewer such devices, and almost all models modern TVs are equipped with special filters that eliminate such influence to one degree or another, but the possibility of interference should still be taken into account. For example, Legrand does not recommend placing power cables closer than 2 cm from the antenna.

• Front panel. This design element of the device performs not only a protective, but also a decorative function. It can be chosen to best suit the interior of the room. Depending on the purpose of the Legrand socket, it may contain additional outputs, for example SAT and R. Connection TV-R-SAT sockets is performed using a single cable coming from a special adder.

• Caliper. Serves to fasten all elements of the socket design to each other, as well as securely fix the device in the mounting box.

Connecting a TV outlet

To connect such an outlet, you need to follow a simple algorithm:

1. Prepare and install. To install built-in devices, which are the most common nowadays, you have to drill a hole in the wall for the box. In addition, to lay an antenna cable suitable for such an outlet, you will have to cut a wall. These works are associated with the appearance of a large amount of dust, so they try to coincide with the renovation of the apartment.
2. Prepare the cable. To do this, it is necessary to remove the protective shell layer approximately 3 cm from its end. Next, you need to carefully remove the central conductor from the insulation at a distance of 1 cm from the edge.
3. Separate the housing from the front panel and caliper.
4. Connect the center conductor to the corresponding housing terminal using a screw connection.
5. Fix the cable screen with a special clamp, ensuring reliable electrical contact.
6. Attach the board to the support and secure the entire structure in a pre-prepared mounting box.
7. Install the front part of the TV socket.
8. Connect the antenna wire coming from the TV to the corresponding socket connector (TV-R-SAT)

It should be noted that there are designs of television sockets, the method of attaching the antenna wire to which may differ slightly. For example, Legrand sockets can use hinged or spring fasteners. In any case, the basic connection principle remains the same.

Connecting a group of television sockets

It has long become normal to have two or more televisions in one apartment that can receive a signal from a provider cable television(TV) or from satellite dish(SAT). In order to correctly connect Legrand TV sockets, you can use the following diagram.

The connection diagram for television sockets shown in the figure is called a “star connection” and has a number of advantages:

• Slight signal attenuation.
• Since all the wires come out of one place, it is convenient to place the input box in it.
• There is no need to use an excessive number of pass-through sockets, which has a positive effect on the signal quality.
• The malfunction of one device does not in any way affect the quality of operation of all the others.

In this diagram, television sockets are connected through a special device called a splitter. It is designed to divide a TV or SAT signal into equal parts transmitted to individual devices without losing its quality. This is not the only type of splitter used for installing antenna cables. Another common type of these devices is TAP. Their main difference is that the splitter divides the signal into equal parts according to the number of subscribers and can be used as a signal adder. As for the TAP type splitter, it separates some part of the TV (SAT) signal and transmits it to the number of pins provided by the design.

When planning a television distribution network during renovations in a private house or apartment, the main goal is not to disrupt design ideas external connections.

First you need to determine what types of signals will be used in television distribution network: cable, terrestrial or satellite television. When using AV receivers or other devices with a built-in FM tuner, you may need an outlet with a VHF (R) output.

Sockets are divided into two types: pass-through and terminal, and also by purpose: TV - for terrestrial television, R - radio, SAT - satellite television.

The following combinations of television sockets can be found on sale: TV (45-1000 MHz), TV+R (92-108 MHz), TV+SAT (950-2500 MHz), TV+R+SAT.

A pass-through television socket has one input and one output, from which the cable is connected to the next socket on the network. Thus, depending on the signal strength, it is possible to install a chain of sockets on a single coaxial cable. A socket of this type introduces minimal pass losses and greater signal attenuation to the terminals for connecting audio-video equipment. These sockets are practically not used to build systems that involve distribution satellite signal, since full operation of satellite receivers on one TV cable impossible for most solutions.

The terminal television socket has one input and outputs (TV, TV+R, TV+R+SAT) for connecting subscriber equipment. Thus, summing the signals various standards and frequency ranges in one cable, you will receive the signal you need by connecting the equipment to the appropriate connector.

For those cases when two independent cables are laid in one of the socket boxes, we can offer a socket that has two independent outputs that do not have filters for the transmitted ranges. You can connect subscriber equipment to any of the outputs that matches the type of signal being transmitted. This type of socket can be used for solutions when it is necessary to transmit a modulated RF signal to a distribution board with further transmission of the image to other TVs in the house.

Don’t worry about whether a third-party mechanism is suitable for your fittings; all mechanisms are standardized and can be used with fittings from any brand: Legrand, Shneider Electric, ABB, Gira and others.

An example of using television sockets is shown in the diagram. This is a house wiring with connection of terrestrial cable and satellite television.

Contact our specialists and we will equip your home with television sockets required configuration for specific tasks.

TV socket(TV socket) is a device designed to connect a TV to a television, satellite or radio network. Allows you to create aesthetic and easy-to-use connections (the cable is usually hidden in the walls or under the floor plinth). There is a possibility parallel connection two or more devices, as well as the ability to increase the number of network sections. TV sockets differ in connection method, manufacturer, appearance and operating frequency.

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You think you've already figured it out what kind of device is this? Are you ready to buy a TV outlet? Do not hurry! Let's get everything straight first to avoid misunderstandings. Below we show and explain what types of TV sockets there are, their structure, as well as features that should be taken into account before choosing a TV socket.

Types of TV sockets

TV sockets, depending on the installation features, there are individual, pass-through and terminal.

Summarizing all of the above: feedthrough and end sockets are used if and only if there are multiple TVs on the network receiving television signals. Do you need a TV socket to connect your TV (one)? Buy a single socket! Do you need sockets for, for example, four TVs? Buy 3 input sockets and 1 end socket. We've sorted out the types of television outlets, let's move on.

You can view the catalog of individual, pass-through, terminal TV sockets on our website.

TV socket device

Any television socket consists of several main parts:

• body (which is also called printed circuit board), necessary for connection with antenna cable;
• front panel, which performs protective and aesthetic functions (can be selected in accordance with the general style of the room and personal design preferences);
• adder, necessary for connecting a radio or satellite antenna in addition to the main one;
• caliper - which serves as the basis for fastening all parts of the socket into a single structure, and also ensures reliable fixation of the socket in the installation box.

Features of choosing television sockets

Let's assume you trust the well-known brand Legrand Valena (we fully support you in your choice). What parameters does a buyer need to know when choosing Legrand Valena TV sockets? On sale you can find sockets with clock frequency in the range from 5 to 2400 MHz. You should know that each type of signal (satellite, cable, radio) has its own operating frequency:

• Cable TV or TV operates with a frequency from 45 to 1000 MHz outdoor antenna;
• radio and television signals travel with a frequency from 92 to 108 MHz;
• with a frequency from 950 to 2500 MHz - cable and satellite TV signal in combination with a radio signal.

Thus, sockets should be selected according to the type of signal: R (radio), TV (cable or antenna television) and SAT (satellite television). Very often, one socket combines several sockets at once: TV+R, TV+SAT, TV+R+SAT. Thanks to this, it is possible to combine signals from different standards and frequency ranges into a single cable to obtain the required signal in the appropriate socket.

As for manufacturers, here the buyer can choose a device from dozens of companies, the most famous of which are: Legrand, ABB, Shneider and others. Such mechanisms are usually standardized and compatible with fittings from third-party brands.