How to strengthen the signal of the TV indoor antenna

Reasons for a weak signal

The digital signal transmitted by the repeater may be too weak to receive due to the following reasons:

  • Long distance to the transmission tower.
    The same “inverse square law” is applicable to the radio waves of the UHF range, on which digital television broadcasts, as for any other type of electromagnetic radiation.
  • Absorption of waves by the atmosphere.
    The air itself is practically radio-transparent, but dust, fog, moisture can scatter and reflect the signal.
  • Obstacles in the path of radio waves.
    UHF broadcasting is received in the line of sight, the waves practically do not bend around obstacles. Therefore, if between the repeater and the receiving antenna there is some object that is opaque to radio waves (buildings, hills, a forest of tall trees), at best the signal will be weakened. This is more appropriate in cases where indoor antennas are used: any walls, even thin ones, absorb electromagnetic waves.
  • Only echoes are received.
    If there is an object shielding radio waves on a straight line between the antenna and the repeater, you will only have to receive the television signal that will be reflected from other objects (for example, neighboring buildings). Such radiation is many times weaker than the one that was originally broadcast from the TV tower.
  • Poor receiving equipment: antenna with low sensitivity, cable with high resistance, etc.

In short, there can be a lot of reasons. In most cases, it is difficult or even impossible to influence them. Therefore, in order to watch TV without freezing and scattering of the picture, you need to find the right way to improve reception.

Option number 2

If SWA (Feeder Powered Antenna Gain Board) is used, the circuit will look like this.

strengthen, signal, indoor, antenna

Connection is made in the following order:

  • Connect the cable between the antenna and the separator separating the external signal from the operating voltage.
  • Connect the power supply. This is necessary if the amplifier is not receiving power from the receiver or receiver.
  • Connect the separator to the TV receiver.

If you need to connect two or more TVs, then the signal after the separator can be sent to the splitter.

3 ways to connect the amplifier to a terrestrial digital antenna

In cases where the incoming TV signal is too weak, the tuner will not be able to decode it, and the TV itself will not reproduce the picture and sound. As a result, the user often has to think about how to amplify the antenna signal. We will understand the causes of the problem and ways to improve the quality of the received terrestrial television.

How to choose the right one

When choosing an amplifier, the owner of the TV needs to consider the following parameters:

  • Required gain range.
    The device can separately amplify the UHF and MV (this is useful if there are local stations transmitting an analog TV signal in this range), it can be broadband, that is, it can work with several bands (however, losses in reception quality are inevitable: universal amplifiers are always worse than highly specialized ones). and can be multi-band with several amplification units for each frequency region.
  • Device type.
    The amplifier can be built-in (that is, a structural part of an active antenna) or external, connected to the cable.
  • Type of food.
    The voltage can be supplied to the amplifier either via a coaxial feeder cable or directly from an external power supply. “Cable” devices are more compact, but amplifiers with separate power supply are more powerful.

Advantages and disadvantages of connecting an amplifier

Connecting the amplifier to the TV antenna promises tangible benefits:

  • a sharp increase in signal power even when using the antenna of the previous design;
  • no more worrying about TV placement.
    This is especially noticeable if an active antenna is used, in which the amplifying board is part of the structure. In this case, the power of the signal transmitted to the TV turns out to be so great that even a whole coil of cable will not become a tangible obstacle. When using an external amplifier, it will need to be placed closer to the antenna, but the gain in power and signal quality will still be noticeable.

If you intend to connect an amplifier at home, then you need to keep in mind the possible disadvantages and limitations:

  • The complexity and cost of equipment increases.
    Even if you use the simplest amplification unit that can be soldered, you will need new elements: fasteners, connectors, a power supply, special tools, etc. But if you like to work with your own hands, this item will not be a problem.
  • I will have to take care of the nutrition.
    Any amplifier, in fact, converts the received signal into its exact copy, which has a high power. Additional energy must come from somewhere. you need an external adapter connected to the mains. A set-top box or TV set that has the function of an active antenna socket with voltage transmission through a feeder is suitable as a power source.
  • Not in all cases the use of amplification is appropriate.
    To create a powerful copy, you need a high-quality original, and if the TV signal is clogged with noise and interference, then the amplifier will increase them too. As a result, even filters and tuners will not always be able to cut off the useful signal from the parasitic.
  • Over-amplification will reverse the effect.
    If the signal is too strong at the antenna input, the equipment will consider it non-existent and will refuse to reproduce it. Therefore, in the area where reliable reception to a passive antenna is possible, you should either refrain from using an amplifier, or lower the power factor (if a model with a regulator).
READ  How to make an antenna plug for a TV

Thus, in order for a TV antenna amplifier to be useful, a high-quality and weak signal is necessary at the same time.

Signal amplification methods

Strengthening the TV antenna signal is achieved in 5 ways:

  • Use a better quality TV antenna than the existing one.
    Several decibels of amplification can be gained here, depending on the design. Check if you have the correct antenna.
  • Precise orientation.
    Almost all devices operating in the UHF range have a clearly oriented diagram and most effectively receive a signal from one direction. Even a 5-10 degree turn can give a serious increase in signal strength.
  • Replace cable.
    If the distance between the antenna and the TV receiver is too great, the lion’s share of the received signal power is lost due to the resistance of the conductor. This can be avoided by using a low-impedance feeder (for example, with a central conductor not made of copper-plated steel, but of pure copper).
  • Move the TV closer to the antenna.
    The cable is getting shorter: in some cases even 2-3 meters can be decisive. Reducing the length of the feeder avoids unnecessary loss of signal power.
  • Use an antenna amplifier.

We will dwell on the last option in detail, since it often turns out to be decisive.

Connection diagrams

There are several ways to connect an amplifier. The choice depends on the equipment available and the user’s capabilities.

The simplest antenna for digital television. Do it yourself.

It is already a fait accompli. analogue terrestrial television ends its glorious history in Russia. It was replaced by digital TV broadcasting. This is generally good, the quality of the TV picture is much higher. Today I will tell you how to make a simple antenna with good characteristics on your own.

Few memories. At school, I studied in a radio circle, led by specialists from SonyIR, guys are very professional, they passed on their knowledge to young people. And at that time the first TV channel alternative to state broadcasting appeared in our city. They played all sorts of films there that were shown in video salons at that time. Well, we naturally go to the teachers, they say, tell us how to make an antenna, so that it is uncomplicated and so that it is good. Well, without thinking twice, the antenna was designed, manufactured and tested, showing excellent results. And actually, when the question arose about an antenna for digital TV, I had no doubts about the antenna design.

For the manufacture of the antenna, ordinary copper wire is used, the thicker the diameter, the stronger the product will be. The construction is shown above. I think no questions about the manufacture should arise. An additional advantage is that the characteristic impedance of the antenna coincides with the characteristic impedance of the cable and no additional matching elements are required.

Why it works?

Effect of noise on the image in analog and digital versions of the signal

With the old analog signal, connecting the amplifier to a simple antenna did not work. along with the useful signal, noise increased and the picture was still snowy and choppy. But digital channels are another matter! In order to extract a useful signal, a small difference with noise is enough for the receiver. If you amplify even the noisy signal of the indoor antenna, its level will be enough for digital channels to be extracted and decoded.

How to do it?

You will need a simple signal amplifier (adapter with antenna plug) and the indoor antenna itself. Connect the antenna plug to the input of the amplifier. The output of the amplifier, respectively, is connected to the TV.

Experiment with the position of the antenna and it should work. Turn on the set-top box, plug the amplifier adapter into the socket and turn on the setting. after a while the set-top box will find up to 30 channels with a clear image. and all this without an outdoor antenna! Agree, it’s very convenient!

Happy editing and interesting TV shows!

Easy customization of the home indoor antenna!

So, you have purchased a digital TV set-top box. It’s time to start using it. but what if you don’t have a suitable outdoor antenna at your disposal? It doesn’t matter. take a simple room and add… an amplifier to it! How to connect them correctly. !

Antenna redesign

Most often, the design of the antenna is thought out taking into account the standard search for the terrestrial signal. It can be changed with any conductive metal object: wire, cable, balcony dryer, central heating radiators, etc. Aluminum and copper items with a large surface area are best suited. Metal objects not in contact with the antenna, on the contrary, interrupt the signal.

READ  How to strengthen an antenna for a TV with your own hands

Some antennas require special tuning before use. You should check if the correct frequency range is set to receive a particular signal.

Advantages and disadvantages of antenna amplifiers

When planning a home television network, one must take into account the fact that when using several amplifying circuits, the video stream can be significantly distorted. Therefore, the number of such devices should be the smallest.

The advantages of these devices include the following:

  • Even a weak TV signal can be received;
  • Small noise factors;
  • You can improve the signal in several frequency ranges at once.
  • Using a wideband amplifier can overload the acceptable signal level, so it must have controls on different bands to avoid this problem;
  • Self-excitation of the device;
  • Susceptibility to lightning discharges;
  • Signal loss at the output.

Amplifying devices correct the signal after the antenna for the TV. Therefore, which one to choose depends on the terrain and on the needs of television equipment.

So, installing an amplifier for a TV antenna in the country or in the countryside solves the problem of a weak signal very well.

Another important point is the power supply. Each amplifier has a power supply unit that can be built-in or external. The built-in will work well with the stability of the electrical network and consumes up to 10V. If it burns out, you will have to replace the entire device. Therefore, if the network has power surges, it is better to use external units. They have larger sizes and different input voltages depending on the amplifier (5, 12, 18, 24 V).

Models for amplifying terrestrial and satellite signals

  • Gecen A05-02. The device increases the signal level to 19-21 dB. Operating frequency ranges for satellite TV are within 950-2400 MHz, terrestrial. 5-950 MHz. Power to the Gecen A05-02 broadband amplifier is supplied through a coaxial cable from a satellite receiver (read more about installing satellite TV). To receive an amplified terrestrial TV signal, an additional power supply is purchased.
  • Polish amplifiers of the SWA series. They are installed mainly on “arrays” of antennas and have different gain factors. The frequency range varies from 49 to 790 megahertz. The supply voltage is 9 volts. Installation is carried out using a stud or threaded connection.

Various factors can negatively affect the TV signal level. Modern radio technology devices help to increase it. They have a number of advantages: mobility, high gain, and a large selection of models. Thanks to the joint work of the antenna and the amplifier, you can watch TV in good quality.

one Alcad AL-200 High quality in all aspects of operation. The most popular amplifier in Russia
2 Eurosky SWA-105 Highest gain (25dB). Optimal price
3 Rexant 05-6202 Wide range of amplified frequencies (5-2500 MHz). Divider into three streams
four Locus LA-31 The best choice for accommodation in the country
five Amplifier DVB-T2 High degree of reliability

An antenna amplifier is one of the most important elements of a broadcasting system, which is necessary to improve the quality of the signal at a considerable distance from the broadcasting repeater or in case of unstable communication with the satellite. Has a directional effect on changing the frequency of the received antenna wave with subsequent transmission to the appropriate equipment. In addition, these devices can perform an additional function of a splitter. splitting the signal into several streams to display the picture on different TV screens.

The range of amplifiers on the market is not so popular with eminent manufacturers, and, therefore, does not have a huge number of models sold. However, the whole problem with choosing a good device rests on an elementary ignorance of the main criteria, which is why purchases are very often in vain. Therefore, having carefully researched this segment, we have compiled for you a rating of the best amplifiers for digital and analog television, which are very popular among domestic users.

Indoor Antenna Signal Amplifier for TV

  • How to strengthen an indoor antenna
  • How to improve the quality of your cable TV
  • How to choose an antenna
  • To set up, you need a working remote control, an instruction manual, a DVD player and discs with high-quality recordings of several widescreen films (so that when playing back, there are dark bars at the top and bottom of the picture). You can do without a player, and set up through one of the TV channels, but this is not very convenient.
  • – a set of locksmith tools;
  • – knife;
  • – scissors.

Find the position of the dish where the signal is greatest. Fix this position by tightening the bolts. Repeat the same steps for the antenna tilt angle (vertical).

Adjust the position of the converter in relation to the dish (distance from it, angle of rotation about the axis), achieving maximum signal values.

READ  Is it possible to connect a modem to a TV

Reduce the signal resistance in the cable connecting the converter to the network card to the lowest possible values. The increase in signal strength from these measures can be up to 10%.

If the distance from the dish to the receiver is great (more than 12-13 meters), look for another place to install the antenna, located closer to the receiver.

If the cable consists of two or more pieces connected by connectors, replace it with one solid piece. If there is a large margin of cable in length, get rid of the excess length by cutting off the excess.

Even if the parameters of your cymbal are within the recommended parameters, replacing it with a larger one will increase the signal strength.

The signal strength also depends on the receiver model. By installing a more modern map, you can get an increase in signal parameters.

Antenna location

The quality of the TV signal directly depends on the location of the antenna. Concrete walls, metal fences and structures greatly interfere with the signal transmission, therefore, it is most often located outside the house, on a wall or roof. If you know where the nearest transmitting tower is, the antenna should be turned in its direction.

In general, customization most often requires a certain amount of time and effort. It is necessary to move and twist the antenna, while constantly monitoring the image quality.

Two or more antennas can be used to get a clearer signal. They are located as high as possible, at the same distance from the switch.

What factors influence the deterioration of the TV signal

Before studying radio technical innovations, it is necessary to analyze why the level of functioning of the receiver is low. Interference and poor picture quality can be caused by:

Ways to amplify the power of a TV antenna

  • Reposition the antenna. As a rule, it is directed towards the transmitting tower.
  • Purchase of an antenna amplifier. They are electrical devices that connect directly to the antenna and give an impetus to improve the received signal.
  • Expand the number of antennas for a clearer picture, installed at the highest location.
  • Change the device to a more powerful TV antenna.
  • Remove all objects and metal objects that may interfere with the reception of the TV signal.
  • Check the TV cable for integrity. In case of short circuits or breaks, replace it with a new one. Choosing the right cable is important for a good signal.
  • Create the effect of an in-phase antenna array (ATS). It consists in the fact that identical receivers constitute a complex system that operates on a common matched load so that the signal phases are the same.

Knowing how to improve the TV signal, you can reduce the interference of the image on the screen to a minimum and enjoy high-quality viewing regardless of the distance from the TV center.

How to choose an antenna amplifier

For the correct choice of antenna amplifier, pay attention to the following parameters.

  • Distance from repeater. This indicator should be within 10-150 km.
  • Frequency range.
  • Signal level at the output of the device. The best option is 100 dB per microvolt.
  • The gain of the device. This indicator must be at least 40 dB.
  • The type of device for which it is necessary to amplify the TV signal.
  • Noise figure. It is recommended not to exceed this parameter by more than 3 dB.
  • Consumption current. The optimal value is considered to be 30-60 mA.
  • Location: on the receiver or near the device.

Note! For digital television, a device with a supply voltage of 5 V is preferable.If you choose a DVD-T2 digital set-top box with this parameter, you do not need to buy a power supply for an antenna amplifier.

5 DVB-T2 amplifier

A digital signal amplifier of the DVB-2T standard, despite its dubious origin, has good performance. Firstly, the method of execution attracts attention: the microcircuit of the device is placed in a sealed steel case, which reliably protects it from mechanical stress. True, the amplifier should still be protected from atmospheric precipitation, since its location should be as close as possible to the terrestrial antenna itself.

Antenna redesign

Most often, the design of the antenna is thought out taking into account the standard search for the terrestrial signal. It can be changed with any conductive metal object: wire, cable, balcony dryer, central heating radiators, etc. Aluminum and copper items with a large surface area are best suited. Metal objects not in contact with the antenna, on the contrary, interrupt the signal.

Some antennas require special tuning before use. You should check if the correct frequency range is set to receive a particular signal.