Owners of several TVs in the house often wonder how to split the signal and not degrade the quality of the broadcast. A well-chosen and connected antenna splitter creates a TV cable wiring structure from a single source without significant loss of signal power.
Kinds
There are several types of antenna splitters, but they all have a similar external device, consisting of a metal case and connectors for connecting a cable. Connectors must be marked on the case:
- Entrance (IN) - for the cable entering the room.
- Output (OUT) - for the cable connecting the antenna splitter to each of the TVs.
According to their purpose, antenna splitters are divided into:
- Dividers (splitters), with the help of which the TV signal is evenly divided into several outputs. Used for wiring cables around the house or apartment.
- Taps (TAP), which differ from dividers by the presence of one pass-through output. Such an output allows you to connect another coupler to it in series without loss of quality. Designed to organize a television network in an apartment building.
It is worth paying attention to the important property of dividers to pass the signal in the opposite direction and be used as adders. This quality allows splitters to mix signals from several antennas of different frequency ranges into one cable, if their frequency specifications allow.
Characteristics
When selecting any equipment, it is necessary to proceed from both the characteristics and the individual features of its installation in a particular situation. Antenna splitters are no exception. How to choose the right divider according to its parameters?
Characteristics of the antenna splitter:
- Bandwidth. Shows the frequency range transmitted by the divider. For terrestrial TV, the operating frequency of the divider should be within 5-1000 MHz, for satellite - from 5 to 2500 MHz. A satellite splitter can be used to transmit over-the-air digital and analog signals.
- Number of exits. The antenna splitter can include up to eight of them. Select equipment based on the number of connected TVs. You can connect a splitter with a large number of outputs to expand the television network.
- Attenuation level. An important indicator that determines the magnitude of the reduction in the power of the transmitted signal. The smaller this figure, the smaller the output loss will be.
- The presence of an RF amplifier. An antenna splitter with a built-in RF amplifier is called active. Such a divider is able not only to maintain the power of the incoming signal, but also to increase it. It is worth considering the need to connect power to the active divider.
If you intend to split the signal between two TVs, a passive two-out splitter and a good TV cable will suffice. The attenuation will be 3-3.5 dB at each output, which will not have a significant impact on quality.
If the plans are to split the signal into three or more TVs, then in order to select an amplifier, it is necessary to draw up a wiring diagram so that the input to each TV has the same signal level. Be sure to take into account the attenuation level not only in the divider, but also in the cable. The use of an active amplifier in this case guarantees a reduction in separation losses, the length and quality of the cable used.
Do-it-yourself antenna splitter
The antenna splitter circuit does not contain anything complicated, and it is technically quite possible to make it yourself. Any divider consists of a bridge with a ferrite transformer and capacitors. But is it worth it to make it so difficult? The manufactured device will only be suitable for dividing the analog television signal, and ferrite rings can only be found in specialized stores.
It makes sense to constructively modify an inexpensive Chinese-made antenna splitter or convert a passive divider into an active one. Many Chinese no-name manufacturers save on installing additional resistors and SMD capacitors. Your best bet would be to buy a splitter from trusted brands such as Alda, Rexant or Lans.
Equipment for digital television - this is what you can buy in our store. Our company operates on the market of essential and satellite equipment Since 2003, we already know most of our customers by sight.
For regular customers of our online store there is a system of discounts, which is calculated automatically according to the coupon number assigned to you personally.
All equipment undergoes pre-sale preparation, namely, it is installed latest version Software for satellite and terrestrial set-top boxes. All receivers are tested for performance.
Our company delivers equipment, both in Moscow and throughout Russia. with most companies courier delivery Agreements on preferential delivery price have been concluded.
In our online store you can find almost any equipment that you may need to receive satellite and terrestrial television. We tried to make the ordering process convenient for anyone. If you plan to order more than one item, but several, then you can use the search in the store and pay attention to related equipment. If you want to pick up equipment for receiving satellite TV, then you should go to the tab menu "Satellite TV", if for receiving terrestrial or cable TV, then " Terrestrial television"etc. If you have any questions during the ordering process, you can use the online chat, which is located on each page of the online store, or order a call back.
We hope that in the digital TV online store you will be able to spend the minimum amount of time ordering the required equipment.
When a second TV panel appears in the house, the question arises - how to connect two TVs to one antenna. To do this is quite simple. If necessary, you can connect not two, but three or even 4 TVs to a conventional antenna, cable TV or satellite dish. You just need to know how to do it correctly, and take into account that when the signal is divided into several equal parts, its quality deteriorates.
Ability to connect more than one TV to the antenna
When connecting two TVs with T2 tuners to the antenna to watch digital TV, you need to be prepared for a loss in image quality. A good signal is divided into two equal parts and already in this form goes to both devices. And in the event that 3 TVs are connected, then the share of each of them only a third of the original signal remains.
Important! Another factor that will affect the final picture on the screen is the length of the cable. The larger it is, the worse the image will be. Therefore, you should make sure that the distance from the TV to the splitter is negligible.
All this indicates that the use of one antenna for viewing digital TV channels on a pair of devices is relevant only in cases where the signal is initially very good, and its division into two parts will not bring a significant deterioration in the image. Indoor antennas are not suitable for signal propagation. Multiple TVs can only be connected to an outdoor antenna(Meridian and others), cable or satellite television(Tricolor, etc.).
How to connect two TVs to an antenna
To split the signal between two TV panels, you will need a splitter (splitter), five F-connectors, 2 TV plugs and a cable. In this case, the splitter for connection should be purchased with two outputs. If there are three of them, and one is unoccupied, then it will be necessary to connect a ballast resistor with a resistance of 75 ohms to it.
Advice! If you plan to connect several more TVs in the future, you can immediately purchase a splitter for the required number of devices and drown out the free outputs with ballast resistors.
The connection order consists of the following sequence of actions.
Features of connecting three or more TVs
When connecting three or more TVs to one antenna, you need to take into account that the signal in this case will go to the devices is very weak. This means that one can count for show only analog channels , digital broadcasting is only possible with a very good source signal.
Advice! To obtain good result when connecting three or more TV receivers to one antenna, you need to use only a high-quality cable with a resistance of 75 ohms and a frequency range of up to 1000 MHz.
But recently, all kinds of amplifiers have been on sale, which (as the manufacturers say) are capable of providing signal propagation from one antenna to several TVs. no loss in quality.
Connection diagrams two (a) and three (b) TV receivers to one antenna look like this:
Signal amplification
As mentioned above, the signal can be amplified using special devices. To improve initially weak signal, the user will need a special amplifier that is mounted near the antenna, and if the signal is good, but it is only enough for one TV, you should use an active antenna splitter. Read more about these devices and the features of their connection - later in the material.
For active antenna with amplifier mains power required. In case of use outdoor antenna Finding an outlet nearby is problematic. In this situation, there are two ways to provide power to the device.
The first option allows you to supply voltage to the antenna directly from the TV through a cable that transmits a television signal. This is possible through a special splitter that allows the passage of power supply, which can be determined by the inscription Power Pass near one of the outputs. This connector connects the cable that goes to one of the TV receivers, with the power supply on the other end plugged into an outlet.
Advice! Splitters with power supply are convenient when using DVB-T2 set-top boxes. In this case, power is supplied through the tuner, eliminating the need to use another power supply.
The second method is relevant if such a splitter is not available (since it is a rather scarce commodity). In this case, you can provide power supply using a special adapter. On the one hand, it has an antenna socket into which you need to insert a separator from the power supply. On the other, there is an internal thread and a needle, which must be screwed onto the divider inlet. After connecting the unit to the mains, power will be supplied even through a conventional divider.
It is better to take the power supply for the amplifier with voltage regulation in order to increase or decrease it if necessary. This may be relevant if the signal is amplified. In this case, when watching digital TV video may freeze until voltage is lowered.
Splitter with amplifier
If the antenna signal is good, but not enough for several TVs, you can use a special active splitter. It looks like an ordinary splitter, but inside it is a microcircuit and resistors. When connecting a pair of television panels, you can try to do without it, but if the signal is divided into three or more parts, it must be used without fail.
Power for active splitter is on in the same way as for an antenna with an amplifier. The cable going to the TV is connected to the output labeled "Power Pass" with the power supply connected on the other side (the first method).
Features of connecting to a satellite dish
You can connect a satellite dish to two TVs using several receivers or via a high-frequency modulator.
Via RF modulator
If the satellite dish is equipped with a high-frequency modulator, you can connect a conventional splitter to its output, and then run a cable from it to the television panels. In this case when you change the channel on the receiver, it will change simultaneously on both TV receivers.
Advice! You can partially avoid this inconvenience by connecting one or both TVs to the receiver via RCA or SCARD. In this case, in addition to a satellite dish, it will be possible to connect an outdoor or indoor antenna to the device, which will allow you to set up the display of conventional terrestrial channels.
With additional receivers
If you have not 1 receiver, but two, you can use them to set up the display satellite channels on different TV panels. This can be done in four ways.
- The first way is serial connection. If one of the receivers has not only an antenna input, but also an output, you need to connect a converter to it, from which you can run a special cable certified and suitable for satellite equipment to the second receiver. The disadvantages of this method are that two cards will be required to view encrypted channels, which implies a double subscription fee. Also, with this connection, it is impossible to simultaneously view channels with different polarization (horizontal and vertical) on two TVs.
- The second way is using a special certified splitter(the standard divider is not suitable due to the difference in voltage required to power the converter and switch the polarization). A head for a satellite dish (converter) is connected to it, and cables to TVs go from it. The disadvantages of this connection are the same as in the previous method. Use this connection only if none of the receivers has an antenna output.
- Another way - purchase and installation of the second converter. This will allow you to use two receivers independently of each other, but you will need to send them to different satellites, which means you will have to watch different channels. Everyone will need their own card with a separate subscription fee.
- And last way connections - using a receiver with two outputs for horizontal and vertical polarization. The cable from them must be connected to the multiswitch. And already from this device you can connect up to three television panels. Then on all TV receivers you can independently watch channels in different polarizations, the multiswitch will independently make all the necessary conversions. However, cards must be purchased by the number of receivers, and subscription fee will also be entered by the number of connected devices.
In conclusion, it should be noted that there are usually no difficulties in connecting several TVs to one antenna. This is a fairly easy process if you know the connection diagram and the correct sequence of actions. It is worth remembering that the antenna signal is divided into several parts, and if it is enough to receive analog channels, then digital television in the end it might not work.
Best TVs of 2018
TV LG 43UK6200 on Yandex Market
TV Sony KD-55XF9005 on Yandex Market
TV LG 49UK6200 on Yandex Market
TV Sony KD-65XF9005 on Yandex Market
LG OLED55C8 TV on Yandex Market
Quite often, one family has two or even 3 TVs, but the antenna is still the same. Many home masters have a natural question: how to connect several TVs to one antenna, given that they are all in different rooms. This can only be done using a special TV signal splitter or splitter.
In strict technical terms, this is a device that consists of a set of resistances designed to match the wave reactance of the antenna feeders and several television receivers. The splitter, in addition to a stable connection, guarantees the support of a passing signal with minimal attenuation.
On sale, you can pick up a splitter for two TVs, and if you need to connect 3 TVs, then you need to choose splitter with three outlets.
Advice! When using a splitter for 3 outputs, three TVs must be connected, if less, then a 75 Ohm ballast resistor is connected to the free port, which ensures the normal operation of the splitter.
When choosing such a device in a store, first of all, ask the seller the frequency range that he passes, so that when installing the line on 3 TVs, there will be no problems with the signal. detailed information is also in the user manual of the device.
Splitter "crab"
The design of the splitter (its popular name CRAB) is enclosed in a durable body made of brass or silumin(90% aluminum and 10% silicon), which is not subject to corrosion, but is much lighter than stainless steel. Outside there are connectors for connecting F-plugs: on the one hand for the antenna, and on the other two or more - this is the connection of TVs. Its scheme is quite simple, usually transformer: one turn of enameled wire with a cross section of not more than 0.4 mm, which is threaded into rings or ferrite tubes. The body is closed with a lid, which is soldered or fixed with high-strength glue to enhance the tightness.
How much we connect TV
Before connecting and final assembly of the entire line, it is necessary to specifically determine the number of connected TVs. How to connect two TVs to satellite dish- this is one question, and if you need 3, then the circuit will be slightly different and the splitter is used with three outputs. In addition, it is necessary to take into account the attenuation of the signal, which increases with increasing receivers:
- 1 TV - signal power is 1/1;
- two - signal 1/2;
- 3 - the power is only 1/3.
Therefore, when installing a line on three TVs or more, a signal amplifier is installed. Specialty stores offer a wide variety of these products with features that allow you to make connections without loss of picture quality.
We collect the connection diagram
Consider the option of connecting two TVs, one of which is in the living room, and the second in the nursery. We will use an antenna splitter or splitter that splits the main signal to 2 TVs. To carry out the work, modern equipment is used, so we do not need a soldering iron, tin and rosin.
The splitters of the new sample are used screw sockets: a previously stripped one end of the cable is inserted into the nut, and the second with a similar plug will subsequently be connected to the TV. The central core must be inserted into a special hole in the splitter screw socket, and the nut is wrapped and tightly presses the copper braid of the cable to the device body.
Before starting work, disconnect the products from the network until all work on connecting TVs to one satellite dish is completed.
Step-by-step instruction:
The figure shows the connection diagram a) 2 TVs and b) - an option for 3 TVs.
How to amplify the signal
Many users complain that when they connected two TVs to one antenna (satellite or simple), the image got much worse. There is nothing unusual about this - the fact is that the splitter only splits the signal. To eliminate such a negative phenomenon, it is necessary to use a special television amplifier, which is almost similar to a crab, but there are resistors and a microcircuit.
It requires a separate power supply, so when installing it, you need to have an outlet or a carrier nearby.
TV amplifier
It is better to install the amplifier as close as possible to the antenna, and already make branches from it: for example, for our case, one branch goes to the living room and the other to the nursery. Experts advise in this case not to use a splitter, but to get by with installing an amplifier - it will cost more, but the signal quality will be high.
There is another option for getting rid of interference (and you can also improve the signal quality much) - put special ferrite rings. This can be done on the part of the cable that is not visible from the side, next to the connection to the antenna input to the TV. Such noise cutters are installed, for example, on the laptop adapter wire - a small cylindrical device on the cord next to the plug connecting the cord to the computer. There are other ways as well. Also, do not forget that the signal quality depends on the antenna itself, so you should know. If you are proficient with soldering equipment, then you can even make a quality one. And then you don't have to think why your .
Nowadays, it is not uncommon for a family to have two or more televisions, each of which must be connected to an outdoor antenna.
In the presence of television antenna for collective use, the easiest way is to place an order for connecting the second or third subscriber outlet from a standard branching box installed in the stairwell. This eliminates the mutual influence between the TVs, provides a good matching of the input impedance of the TV receiver with the feeder and does not reduce the signal level at the inputs of the TVs.
However, this requires a significant consumption of coaxial cable. If, however, an individual outdoor antenna is used, then there is no junction box. However, the junction box can be made by yourself.
Rice. 1. Branching boxes with resistors.
On fig. 1,a is given circuit diagram junction box for two outlets from the subscriber cable collective antenna, a. in fig. 1, 6. - for three outlets.
The box is installed in a convenient place in the apartment, its input is connected to the existing cable from the branching box of the collective antenna, and the outputs are connected by television cables to TVs. One TV is connected to each output.
If for some reason the TV is not connected to one of the outputs (for example, it was taken to the Dacha or sent for repair), you need to connect a 75 Ohm resistor to the plug designed to connect to the antenna jack of the TV. Otherwise, a mismatch will occur, and the images on the screens of other TVs will begin to double. For the same reason, you should not make extra taps in the box, and if there are any, you need to connect a 75 ohm resistor to each of them.
As can be seen from the diagram, a two-output box contains three resistors, a three-output box contains four resistors. The number of resistors will always be one more than the number of outputs. All resistors in the box have the same resistance, which depends on the number of outputs and is determined by the formula:
where n is the number of branching box outputs. The exact values of the resistances of the resistors found using this formula should not be selected, you can take the nearest standard value: 24 ohms for two outputs, 36 ohms for three, 43 ohms for four, etc.
The design of the splitter box is quite simple. The body of the box is made of sheet copper, brass or even tinplate from a can. The braids of all cables are soldered to the box body, and the central cores are soldered to the resistors. Resistors can be of the OMLT type with a power of 0.25 W.
The box is closed with a lid made of the same metal, which is soldered to the body of the box at several points. After that, the box is attached to the wall.
The disadvantage of this method of signal branching is the decrease in the signal voltage at the input of each TV set by the same amount as the number of devices connected to the box, due to signal energy losses in the box resistors. Typically, public antennas provide a sufficient signal level on the subscriber taps of the stair splitter box of the order of 1 mV. Therefore, when such a signal voltage is reduced by several times, the splitter box remains at a sufficient level to obtain good image on the TV screen.
The question often arises: why do we need resistors in the box, leading to a decrease in the signal level at its outputs. If, for example, the antenna jacks of three TVs were directly connected to the feeder, it would be very mismatched with the load: after all, the input impedance of each TV at the antenna input is 75 Ohms, the input impedance of three connected in parallel is 25 Ohms, or three times less than the resistance required for feeder agreement.
As a result, a significant part of the signal energy will be reflected back into the feeder and will not reach the TV input. Moreover, if the feeder is inaccurately matched with the antenna, which is usually inevitable, the reflected signal will again be reflected from the antenna and arrive at the TV inputs with a delay, which will lead to doubling and multi-contour images. If there are resistors in the box, it is easy to calculate that with any number of taps with TVs connected to them, the feeder remains consistent with the load.
It also happens that when using an individual antenna, one TV connected to it works well, but when a junction box with two or three TVs is connected to it, the signal level at their inputs is already insufficient, the image contrast on the screens becomes weak and noises are visible. In such conditions, it follows between the antenna feeder and the splitter
box include antenna amplifier. It should be recalled that in the case where the signal level is insufficient even. for the operation of one TV, you need to use a more efficient antenna, and with a long feeder, the antenna amplifier must be installed on the mast near the antenna.
Rice. 2. Split box option.
Another version of the junction box, similar to those used in public antenna networks, is shown in Fig. 2. This box can be used to connect two TVs to an individual outdoor antenna.
A box of this type ensures the matching of the feeder with the load, regardless of whether TVs are connected to both outputs, and also slightly attenuates the signal at the outputs relative to the signal level at the input of the box. The box contains two identical coils of copper bare silver-plated wire with a diameter of 1 mm.
The coils are wound on a mandrel with a diameter of 4 mm and contain 3 turns each. After winding, the coils are removed from the mandrel and stretched into a spiral in increments of 2 mm (the distance between the turns is equal to the diameter of the wire).
Nikitin V.A., Sokolov B.B., Shcherbakov V.B. - 100 and one antenna design.