The digital television format implies a better picture and sound, but in reality, users often face a number of problems, one of which is signal interruption. Why digital channels disappear, and what to do in this case, read on.

The principle of receiving digital TV channels

Despite the fact that digital television has existed recently, it is gaining more and more popularity, as the user receives high quality images and sound. Also, the pluses include the fact that it is possible to connect additional programs, functions and use interactive TV.

The principle of operation of the technology is simple - the encoded audio and video signal enters the TV through antennas in a special stream, and is already decrypted on the TV itself, and the user receives a high-quality image.

Reception of digital broadcasting is carried out in several ways:

• ethereal- the picture is received through the repeater towers;
• satellite- you can watch a large number of channels, but you need a special dish;
• cable- used in apartment buildings, the signal is transmitted through a collective antenna.

Reasons why digital channels disappear

There are situations when channels disappear abruptly or after turning on the TV - one, several or all at once. There are a number of reasons why this may be the case.

All channels

Why are all digital channels disappearing:

• The signal coming from the TV tower is bad for the selected equipment, which is why the TV does not receive reception.
• Wrong antenna selected. Choose an antenna based on the conditions of distance from the TV tower. If the distance is 3-7 km, you can leave the indoor one, otherwise, get a powerful outdoor antenna with a good amplifier.
• Connecting a digital set-top box to a digital TV. Together, these equipments do not function adequately, constantly reboot, and the settings go astray.
• The contacts on the amplifier are oxidized. It concerns more street antennas, especially if their service life is long enough. The amplifiers of some antennas are a simple plastic box into which water freely enters, which causes oxidation. Such situations should be avoided.
• The base frequency of signal reception is incorrectly selected. The essence of the process is to find the broadcast transmitter closest to the house, which allows you to receive a stronger signal. Therefore, make sure that the signal reception frequency is most suitable for your area.
• The presence of interference from GSM and LTE. There are now more telephone towers than TV towers, so they can interfere with the signal. You can fix this by purchasing a special filter that protects against GSM and LTE signals. It is connected as an intermediary between the antenna connector and the TV.
• Lack of DVB-2 support. If the TV or set-top box does not support this standard, then the second multiplex of channels will not show - you will not find them.
• Often the problems are related to weather conditions. In strong winds or thunderstorms, the signal deteriorates greatly, causing loss of channels. Usually, after the normalization of weather conditions, everything returns to normal.
• The receiving point is located in the valley and the signal flies over the antenna. You can correct this situation by moving the antenna to the roof of the house or fixing it on a separate mast.

Multiple channels

Consider the most common cases in which the set-top box catches and shows only part of the channels:

• An inscription about the DRE channel encoding appears on the TV screen. This happens if the set-top box has been turned off for a long time - the device needs to work in normal mode for a couple of hours for synchronization to occur, after which all channels are restored.
• A message about the presence of a paid channel appeared on the screen. If you really have paid channels, extend the work with payment. If such a notification appears on free channels, contact your provider.
• The software is not compatible with the GS-HD receiver. You can fix this by going to the menu and activating the key to restore the channel list.
• Receiver not registered. There is an identification number on the back of the device. Using a computer, go to the Tricolor TV website (https://www.tricolor.tv/), then enter the data received from the provider to register.

What to do if the channels are missing?

If digital channels are missing, you can try to tune them manually or use automatic tuning. Study the general algorithm of actions, because no matter what model your TV is, the setup principle is similar. The main thing is to carefully read what is written on the screen.

Autotune

Standard algorithm of actions during auto-tuning:

After tuning in automatic mode, you will have about 20 channels in high definition. If only 10 out of 20 were found, use the manual search.

Manual setting

Manual setting consists of the following items:

1. Go to main menu.
2. Find the sub-item “Manual tuning”.
3. Enter the data from the provider in the field that appears.
4. Start searching.
5. After each found channel, click the “Next” button.

It happens that you need to make changes to the digital series in order to improve the image quality. Manual tuning takes more time than automatic tuning, but you will be able to fine-tune each channel.

Features of channel settings depending on the TV model

Each TV model has its own factory firmware and individual functionality. Consider how to set up channels for some models.

Samsung

To set up digital channels for most Samsung models, follow these steps:

1. Press the "Menu" button on the remote control, after which the TV menu will open.
2. Select "Channel" - "Country" from the menu.
   
   
3. The TV will ask you for a PIN code. If you have never used it before, then enter 0000. For the necessary search parameters, make sure that you have "Other" in the "Country" line.
4. Set the menu "Channel" - "Antenna" parameter "Cable".
5. Open the "Cable Search Options" menu and set:
   
6. Open "Auto Setup". Signal source - "Cable", type of channels - "Digital".
7. Select the channel type at your discretion - either only "Digital" or "Digital + analog".
   
   
8. Set the search mode to Network.
   
   
9. Click the "Search" button.

After an automatic search, you will find all the digital channels existing in the cable network, but you will be able to watch only those that are included in your package.

Below is a video instruction for setting up digital channels on a Samsung TV:

LG

Setting up LG TVs is as follows:

• press the "Menu" button on the remote control;
• select "Options" and click on the desired parameters to change (for example, in the "Country" section, select Finland or Germany);
• go to the "Settings" item and select auto search, specify the cable connection;
• fill in the window that appears according to the instructions you have.

You can use the automatic update of TV channels, this feature is available from LG. As a result, the previous list will be reset and the channels will be tuned in a new sequence.

Philips

Consider the settings for a Philips TV:

The program sets up channels on its own. After completion, you do not need to do anything else.

There are a lot of reasons why digital channels stop broadcasting, but almost all of them can be solved on your own. The main thing is to decide what exactly went wrong. There are no problems with the subsequent setup either, since all the settings are similar, and you can get the necessary information either from the provider or in the instructions for the TV.

From 2019, a systematic and widespread transition of television to digital television begins in Russia, and the broadcast will be turned off. In some regions, a test broadcasting mode has already been launched. The transition to the "digit" makes it possible to receive a picture on a TV in high quality. But there are still problems. Sometimes residents have a question: “Why don’t they show 20 digital television channels?”

If the TV is of an old generation, then a receiver is needed to receive the signal, or, in simple terms, a digital set-top box.

At the first start, the TV channels are automatically tuned. But there may be situations when it is not possible to see all the promised 20 channels on the TV.

Since these are fairly new technologies, we will talk about the reasons for this.

Why does digital TV disappear on the TV

Yes, our technology has not yet been fully developed and this can happen. But there is no cause for concern. There are a number of reasons, such as:

• a software error has occurred in the device;
• TV signal does not reach the TV.

There are also a number of other factors:

• commissioning works are underway;
• TV broadcasting stopped;
• natural disasters.

But the first two are the main ones that should first of all attract your attention.

Problems with the program

First you need to make sure that preventive measures are not taken. To do this is quite simple.

You just need to go to the site http://rtrs.ru/ where you can find information about the time and duration of such work.

Also on the screen with the menu of the digital set-top box there may be a corresponding notification.

There may be such a situation when the receiver shows only ten channels included in the first package, although recently everything was fine. You should check the level of signals from the second group.

If it is zero, the probable cause is that this multiplex is simply disabled. Most often this happens during the test mode of the TV.

There is nothing unusual about this. So far, there is such a situation that the first group of channels is mandatory throughout the territory of the Russian Federation.

There may be no signal at the second multiplex due to limited funding and there is analog TV in parallel. That is, there are simply no free frequencies.

The sooner there is a widespread rejection of analogue broadcasting, the sooner it will be possible to watch channels from the second multiplex throughout Russia. That is, digital television.

Problems with receiving equipment

If the signal suddenly disappeared, then you need to look for the cause, but there are not so many of them. We list the main ones:

The fixture itself is broken. If, when the receiver is turned on, not a single indicator lights up, it is obvious that the reason is in it and the device will not work.

But it happens that the indicators are on, but very dimly. In this case, the option of breaking the external adapter is possible.

If you pick up a similar 5-watt power supply (for example, from a router), it is quite possible that the set-top box will work.

Receiving antenna malfunction. An indoor antenna is almost impossible to break. But outside, there is always such a possibility. Precipitation, thunderstorms can damage the antenna itself.

Damaged cable. A frayed cable can also affect signal reception. Due to its loss, all channels will not be shown. A thorough check of the cable and connections will be required. This is even more true if the cable is external.

If the sheath is damaged, water can enter the cable and destroy the sheath. A complete replacement of the external cable will help to correct the situation.

If your TV is equipped with a built-in DVB set-top box, you should remember that when asking where the channels on digital television have disappeared, you need to know that they can also break.

Standard instructions for setting up digital television

So, you have decided to connect to digital television. What should be available?

1. Any working TV, maybe not the latest generation.
2. A digital set-top box (another name is a receiver) with a 220V power supply.
3. The cable that connects the set-top box to the TV. As a rule, the set-top box already includes a “tulip” cable with three tips (left and right audio channel + video channel). The latest models of set-top boxes also have an HDMI output. This cable will have to be purchased separately.
4. To connect an external antenna, you must also have your own cable.
5. Antenna for receiving a TV signal. It is also possible to connect to cable TV.

Now that the completeness has been checked, you can start connecting.

Important!

If the equipment is brought into the room from the cold in winter, it must be kept at room temperature for at least an hour. This is necessary for the evaporation of condensate, both on the surface of the device and inside it..

1. If it is possible to use an HDMI connection, it is better to use it. This will improve the quality of the transmitted picture. When connecting "tulips" - match the colors on the cable and at the inputs of the set-top box.
2. Connect the cable from the antenna or the cable from the provider to the antenna input.
3. Connect the prefix to the 220V network.

A regular receiver is capable of receiving all twenty channels from the free package.

On the other hand, if your set-top box supports Wi-Fi connection, it is possible to watch IPTV channels.

And here the opportunities to increase the number of received TV channels are also very large. In addition, it becomes available YouTube, as well as WEATHER And NEWSLINERSA.

Automatic and manual search

So, all cables are connected. It remains only to turn on the prefix. Depending on the model, when you first turn it on, there is a possibility of automatic search and recognition of the channels available for this device.

If this does not happen, go to the settings section:

• set the auto search mode;
• select a country from the list;
• specify the broadcast format (DVB-T2).

After a short wait, a list of currently available TV channels will appear on the TV screen.

Be prepared to wait a while.

If the signal is good and stable, the channels will not be displayed all at once, but in batches, while the receiver is being tuned.

10 channels in each package. As a result, a list of 20 available free-to-air channels in Russia should appear.

You can also search for channels manually. First, you need to repeat the same steps as during auto search - select the country, broadcast format (DVB-T2) - but select the manual search mode.

In this mode, you will need to enter additional data. For example, the frequency used. In this mode, the channels will be connected in stages.

Standard difficulties in receiving digital television (signal)

If you study user reviews about digital television, you can also find negative ones. There are difficulties with receiving individual channels. There are some situations that are solved quite easily, and secondly, you cannot do without calling the wizard.

But almost always the problems are quite easily eliminated by the consumer himself. Cases of signal failure due to the fault of the broadcaster are very rare.

And if, for example, does not show only Russia 1 on digital television, most likely, the equipment is being prevented by the provider itself.

Such prevention is needed and after a few hours, broadcasting resumes again.

So, what can the owner of a digital set-top box face?

Let's analyze typical malfunctions when receiving a digital signal.

The received signal level is very low.

The question may also arise, why does digital television sometimes hang? This problem is quite common.

You can solve it by more precise adjustment of the antenna, move it to another place, increasing the height. It may also be necessary to completely replace the antenna with a better one.

Input level is too high

If the input signal is too high, this can also initiate problems in the transmitter.

This may be due to both its close location and the presence of a power limit amplifier on the receiving antenna.

We also look at the signal strength indicator. If the level is 100% but the quality is 0% this indicates what the problem is.

Alternatively, receiving a signal on an indoor antenna will help. Or remove the amp. Now the "number" will not hang.

Cables

Cables have already been mentioned earlier. If the coaxial cable is damaged, it may reduce the signal strength or even not receive at all. And the first step is to visually check the integrity of the cables.

Solving the problem of why all digital television channels are not shown at once, it is from the cable that you should start troubleshooting.

Normally, the resistance is several tens of ohms. Readings that are too large or too small indicate an open or short circuit.

If all problems are eliminated, then the channels will not disappear

Splitters and connectors

A large number of splitters on the line along which the signal from the antenna passes also affects its quality. Each such connector increases the resistance and reduces the level of the received picture.

Any connectors tend to oxidize and lose conductivity. Therefore, the fewer, the better. And don't skimp on installation. The better the connector, the better.

Interference

We are constantly surrounded by radio waves coming from household devices. There are not so few of them. From cell phones and Wi-Fi tethering to microwaves and cars.

And there is nowhere to go from this - progress! To avoid problems when watching TV channels, the installation of the receiving antenna should be treated with special attention and diligence.

Why are only 10 out of 20 digital channels shown?

In order to understand this issue, you need to know about the fundamental difference between digital television and analog television. This is the new broadcasting standard.

In analog broadcasting, each individual channel has a dedicated frequency line for it.

In numbers, the approach can be radically different. Here the broadcast is in batches, each of which can have from 8 to 12 channels on one coded frequency.

And decoding takes place already in the tuner itself. And if it happens, so it shows only 10 of the declared 20 channels, this indicates insufficient power of the carrier frequencies.

In such a situation, changing the position of the receiving antenna can help:

• change direction;
• change the height (higher or lower);
• put a signal amplifier on the antenna.

The picture on the screen will help to catch the desired power. There is an "i" button on the remote control. Click it. Two bars will appear on the screen - “power” and “quality”.

By changing the position of the antenna, you need to achieve a received power of about 50 - 60%. Then start auto search again. The missing channels will reappear and will no longer stop showing.

It is also worth checking the TV if it already has a built-in tuner. The absence of a second multiplex may be the reason that he is not able to catch all the channels. Any broadcast channel may disappear.

TOTAL

Now we can say with confidence that analog broadcasting is disappearing, giving way to digital, which is gaining momentum. Currently, every resident can watch the federal channel in excellent quality.

The work of television is deteriorating under the influence of various factors. These may be technical reasons or even weather deviations. In the article, we will understand why does not show digital TV today.

Reasons why digital TV signal disappears

If the TV does not show due to a weak TV signal, the user should find channels manually at operating frequencies.

Malfunctions also occur due to the presence of metal objects or a computer near the TV. To eliminate it, it is recommended to make a rearrangement in the apartment.

When nothing is displayed on the screen, you need to look Is the correct video input selected?. You should recheck the connection.

There are also problems due to poor-quality firmware of the receiver. Firmware is a program that controls the device and controls decoding. Another name is a decoder.

The solution is a hardware upgrade. To install a new firmware, you need to download the updated version on the body of the device.

If, during the connection, a cable was led into the apartment by specialists, and the user himself did the further wiring, the problem may be in poor contacts. They are in a triple.

Why does not show digital TV today

The broadcast quality may be affected by damage to the cable used for the connection. If necessary, it must be replaced.

Subscribers face the problem due to a rare type of interference arising during re-reflection. It manifests itself in the fading of the displayed picture or in the periodic disappearance.

Multipath occurs due to antenna hit in the area of ​​effect several transmitting stations. To eliminate interference, just move the device.

What to do if there is no signal from the antenna

The quality of the display is often reduced due to the accumulation of dirt in the plate. In this case, it is necessary to inspect the structure and carefully clean its parts. It will not be superfluous to double-check the integrity of the receiver. If it is broken, it must be taken in for repair.

If the reason is the oxidation of the contacts, they must be resoldered. It is better to entrust this to a specialist.

Set-top box malfunction and solutions

The malfunction of the connected tele device can be seen immediately. When it is connected, the LED will not light up to indicate that it is on.

Many set-top boxes have a separate power supply. It is standard and allows you to work with many devices. Its failure is checked by replacement.

Ceased to show digital channels - it is possible to reset the settings

The quality of the display is also deteriorating due to a spontaneous reset to factory settings. In that case, you need by going to the menu device you are using, check if the image is displayed correctly. You need to restart the search for TV channels.

Bad digital TV signal

The TV may not show due to artificial lowering. Causes of occurrence - barriers in the form of trees. Broadcast quality"Jumps" and due to the presence of horizontal sections of the cable during laying.

TV not working due to weather

The TV may not work due to weather conditions. Under the influence of a strong wind, the position of the antenna changes. To correct the situation, you just need to correct it and find the desired channels again.

Repair work

One more reason - carrying out technical work provider. You can find out about this:

1. By calling the support operator.
2. Finding information on the Internet on the website of the provider.
3. By checking the notifications received by the receiver.

If it is not possible to turn on TV channels to check notifications, use the remote control to enter the set-top box menu. The system will display an interference message.

Video on how to tune your TV to digital channels:

Everyone who lives in the age of high technology is sure that these technologies are designed to make life easier. This is true, although there are situations that can contribute to nervous strain rather than relaxation. For example, when some of your favorite TV channels disappear. Naturally, this is far from the best experience, especially when you want to watch TV, and he throws up similar, not too pleasant surprises.

If you are also faced with a similar trouble, then there is no need to rush to the TV master, especially since it may take some time. If you wish, you can try to restore digital channels on the TV on your own. Of course, a 100% return of their broadcast cannot be guaranteed, but, as a rule, independent manipulations help.

Reasons for lost channels

As a rule, two dozen standard digital channels are shown on the TV. But sometimes even they disappear, if not completely, then partially. Given that they are free, problems with broadcasting can be due to many reasons, but the main ones can still be identified:

Problems with the program;

Problems with the receiving equipment.

Both the first and second situations can be solved, but they require completely different manipulations. If the matter is in the equipment, then the attempts of the average user do not always help, and can even harm. If the trouble is with the TV channel itself, then this happens with one, maximum, two programs, but not with half of the broadcast channels at once.

Let's figure out what the number is before doing any manipulations related to the recovery processes. So, the advantages of digital television channels are improved signal reception, cooler sound, picture and other characteristics, compared to other free systems. But only 20 channels are free, which are periodically disconnected and changed, therefore, in a situation where some TV channels have disappeared, there is nothing surprising.

The pay channel symbol appeared on the screen. This is a sign that the subscription to services is ending. If the figure was not paid on time, the answer to the question of why the channels on the digital set-top box disappeared is obvious. You need to replenish the account and then they will start working again, of course, if this message does not pop up on free channels. In this case, it is better to contact the provider for clarification;

There may also be difficulties with the software, more precisely, its compatibility. If this is a GS-HD receiver, then you need to go to the menu and press the "Restore Channel List" button. If the new software does not fit, then on the same receiver you need to: find the TV / RADIO and CHANNEL buttons on the remote control, in addition, press the same buttons on the receiver panel in parallel. But it is very important to do both at the same time. Then press the STANDBY button on the remote control;

The inscription "No signal". It is already a standard sign of problems with the antenna. If the antenna does not work as it should, it is not surprising that the channels began to disappear by the dozens. If the device is new, then it may not have customized programs, so this fact should be clarified. But if the programs used to work, but disappeared in an instant, you should still go outside and see if the antenna has moved due to strong winds or something like that;

Sometimes the connection between the antenna and the cable, or the cable and the set-top box, is broken. If such suspicions arise, you need to make sure that the cable is connected to the LNB IN jack.

When none of the above list helped, there is only one way out - to call for help. The master will definitely figure out what the matter is and return your favorite programs.

Why are only 10 out of 20 digital channels shown?

Over the past two or three years, digital television users often complain that after they have carried out a channel update, half of the programs that were previously shown disappear. Since then, people have a natural question - why did 10 channels disappear if they used to work and were free?

They are trying to find out the answer to this question on many forums, and therefore different versions are being put forward. For some, the channels of the first multiplex do not work, for others, the second. This suggests that the causes of these troubles lie in various difficulties in receiving the signal associated with technical work or features of the functioning of digital television.

It is possible that after a while the channels will restore their broadcasting, so you should not worry in advance where ten popular channels have disappeared at once. RTRS clarifies that while work is being carried out in a test mode, therefore, for some regions, such difficulties will become the norm. Sometimes re-search for channels or flashing the set-top box helps, but if this is not your case, you can use analog or satellite TV, where the signal works without such significant interruptions.

Note.

After the advent of digital television, many users wanted to switch to its reception. It's not just about frequent discussions and the desire to try something new. Signal quality is an order of magnitude higher, and ease of access increases attractiveness. It is possible to connect digital TV to outdated kinescope models with the help of additional devices, and to modern TVs.

Ways to receive a digital signal

There are several ways to connect a high-quality signal to a TV:

1. Cable TV. Reception is carried out via a common cable. The downside is the subscription fee and not ubiquitous availability;
2. Satellite television. Signal transmission is carried out through satellites, and reception is carried out using an individual dish. You also need a monthly fee plus the purchase of special equipment;
3. Broadcast television. The digital TV signal is distributed from terrestrial repeaters, you can receive it from an antenna, indoor or outdoor. This is a completely free method of watching TV shows in a modern format. It has disadvantages: often a low signal level, the quality of the picture can be affected by the weather, the location of the tower, etc.

The least expensive way is to receive digital television through an antenna installed and configured by the user.

How digital television works

The transmission of picture and sound for digital television is carried out by encoding the video signal and sound over digital channels. Digital encoding differs from analog in immunity to interference (external obstacles). A blurry, fuzzy picture, stripes are impossible here. The image is either clear or completely absent.

If the reception is uncertain, then perhaps the picture will break up into squares, disappear and reappear from time to time. It depends on how you set up the antenna. Alternatively, you can install a different antenna or raise and deploy the existing one, pointing at the TV tower.

Required viewing equipment

1. Antenna;
2. A separate set-top box with a DVB T2 tuner that supports the MPEG 4 standard and can operate in Multiple PLP mode.

Antenna can be used conventional analog. If the TV was released relatively recently, then it may have a built-in tuner of the desired format (the outdated DVB T format is no longer supported). Then you don't need to buy anything else.

To find out if there is a built-in DVB T2 tuner, you can look at the data in the data sheet. It is even easier to find a TV model on the Internet and get a comprehensive answer.

Selecting a digital tuner

At first glance, all TV boxes are the same. The main thing is not to make a mistake in the main technical characteristics. But there are other features that affect the further operation of the equipment and the breadth of functions covered:

1. The absence of buttons on the external panel of the set-top box will oblige you to use it only with the remote control, which is not always convenient;
2. If the tuner does not have a USB port, this technique cannot be used as a media player. If available, you can record TV shows and play photos, videos.

Important! A good choice is a set-top box with a separate power supply. It is usually built in. The most common cause of tuner failure is a power supply failure. If it breaks, you need to repair or replace the entire prefix, and the remote power supply must be replaced separately without problems.

Many hang the TV on the wall, and quite high. Then it is inconvenient to use the usual design of the prefix. There are equipment modifications - compact set-top boxes that are attached to the back of the TV with adhesive tape. The strength of the attachment must be considered. Such a receiver is controlled by a remote control through a separate sensor attached to the same adhesive tape on the outer panel of the TV. Power comes from the TV's USB port.

The set-top box can also be used in conjunction with a computer monitor (if there is an HDMI port). Then you can watch digital TV from a conventional antenna. If the built-in TV tuner fails, it can be easily replaced using the receiver.

What channels are available to watch

To watch free digital channels through a conventional antenna, the 2017 list contains two multiplexes:

• the first RTRS 1 - frequency 546 MHz, channel 30;
• the second RTRS 2 - frequency 498 MHz, channel 24.

Technical data are valid for Moscow and the region. They may differ in other regions. A total of twenty television channels and 3 more radio programs are available.

Important! TV does not pick up additional channels. Antenna tuning will not affect the number of received channels, but only their quality.

How to locate a TV tower

Users living in the city, in the signal reception area from the TV tower, are not puzzled by such questions. But for the inhabitants of remote towns and villages, the information is relevant. What knowledge is needed for the best choice and proper tuning of the antenna:

1. The exact location of the tower and the distance to it;
2. Technical parameters (channels and broadcasting frequencies), using which you can catch a digital signal in a given area. This is necessary for the user to manually tune TV channels on the set-top box;
3. Is the entire list of channels available for reception. There may be one or two packages.

Full information about the TV towers is on the official website of RTRS. There are maps where you need to enter the name of a particular settlement in the search bar. A map of the area will immediately open, on which all transmitting TV towers are indicated (green - operating, black - under construction). If you click on the cursor hovering over the selected village, information will be available on where and for how many kilometers operating transmitters are installed, channel numbers (TVK), broadcast frequency, number of packages).

The active menu includes a function that allows you to find out the coverage areas of individual repeaters.

Now, armed with knowledge, it is necessary to determine whether it is enough to install an indoor antenna or whether an outdoor, more powerful one is required.

Antenna types

The analog signal is received at the MV antenna. DVB antennas are more compact. There are combined samples capable of receiving both ranges. From such a combined design, unnecessary elements can be removed, and you get an excellent UHF antenna. For example, if there is a long whisker (an element for the MV signal), they can be removed.

All antennas are divided into:

• active;
• passive.

Active devices are those in which amplifiers are used. The antenna with the amplifier must be connected to a power source. If a receiver is used, the 5V power for the amplifier is supplied through it. This is done in the menu settings. The option is called Antenna Power.

An amplifier does not always mean better reception, in some cases it will even hurt:

1. In the area next to the TV tower, turning on the amplifier can lead to the complete disappearance of reception due to too strong a signal;
2. The amplifier is the weakest element of the antenna, often failing. Plus a power supply and additional wires, which also require repair and replacement;
3. The intensity of the TV signal itself is provided by the design of the antenna. And the amplifier in parallel increases the level of noise and interference;
4. If you want to connect another TV to a passive antenna, this is easier to do.

Passive structures do not have additional amplification, they are usually used in areas with a stable signal.

Antenna selection and installation

An old antenna may be suitable for receiving a digital signal if it consists of short elements or combined. In the presence of working serviceable antennas, it remains only to find out whether they will effectively catch the "figure" in local conditions.

The decimeter signal does not have an extensive coverage area. Therefore, for its distribution, it is necessary to build a network of transmitters. The surrounding landscape, the presence of high-rise buildings, mountains, forests, the power of the repeater greatly affect the quality of the signal. Antenna installation must take into account all these factors.

Reception zone

A stable and reliable signal zone is an area within a radius of no more than 10 km from the television tower. Here, a simple indoor antenna will do a great job of receiving. If you have an amplifier, you can not use it.

If the signal disappears, the image breaks, then you need to connect the existing amplifier through the set-top box, using the appropriate menu item. Power will be supplied via the antenna cable.

Multi-story buildings can become a problem due to the reflection of decimeter waves. But the same reflection can be used. Let's say the antenna does not catch when it is oriented towards the TV tower. Point it at nearby tall buildings, the reception of the reflected signal will probably be much more effective.

It is necessary to check the presence of electrical appliances near the room antenna (third-party power supplies, etc.), as well as metal blinds on the windows. They can significantly weaken the signal.

Short circuit

There are cases when the set-top box suddenly stopped responding to the use of the remote control, buttons, the image and sound disappear, and “Antenna short” is displayed on the screen. The problem does not mean that digital television does not work. There is simply a short circuit in the antenna cable or in the receiving device itself.

Why did the closure happen? There may be several reasons:

1. The presence of a short circuit in the cable associated with careless installation, in all likelihood, at the connection points. The antenna plug can only be damaged by manufacturing defects;
2. The active receiver is in operation, power is supplied to the amplifier. The amplifier is sensitive to lightning and can be damaged during bad weather;
3. A passive antenna is connected, and the power to the amplifier is turned on in the receiver's menu. Passive devices are often short-circuited.

In the latter case, you need to disconnect the receiver from the network, separate the antenna from it, then turn on the power again, on the connected tuner, in the menu settings, turn "Antenna Power" to the "Off" position.

Important! The search for and elimination of the causes of a short circuit is carried out after the attachment is separated from the mains.

Remote area from TV tower

Distance is considered to be more than 30 kilometers from the repeater. With a powerful transmitter and direct visibility, we install a small receiving device such as a wave channel or a log-periodic one. You need to direct the antenna to the TV tower. In such conditions, it is even possible to use an indoor unit with an amplifier.

With increasing distance and when a settlement is located in low places, the requirements for the antenna increase. More powerful samples are needed. A good receiving device necessarily includes an amplifier, and its arrow is long enough. There are samples with several arrows, but they will only be needed under extremely poor conditions.

Many users have a Polish antenna, since in the recent past it was popular because of its affordable cost. Its other name is the lattice. Can this design be adapted for digital television?

It is quite functional, but some changes are required. The antenna amplifier does not contribute, but interferes with signal reception. Therefore, it must be taken out of work. Simply disconnecting the power supply is often ineffective. It is more reliable to dismantle the television cable on the amplifier board and connect it there to the two upper bolts: to one - the central core, to the other - the shielding braid. Thus, the amplifier is excluded from the circuit, and the antenna becomes passive.

Antenna and TV setup

There are several ways to properly set up a digital signal. The choice depends on the conditions of admission.

Auto search

This method is the easiest, but it requires a strong stable signal. The equipment is installed, turned on, digital channels are selected in the settings menu, and auto search is turned on. The TV automatically finds and stores the entire list of channels.

Manual mode

Suppose, in the auto-search mode, the TV cannot catch anything. Or found channels with interference. These pictures are not digital. Perhaps the TV at the same time went through the entire frequency range and caught several analog channels.

Now it will be useful to know the numbers of TV channels (TVK), through which the signal is transmitted for each multiplex. Information about the location of the TV transmitter will also come in handy to direct the antenna in the right direction. If the house is surrounded by other residential buildings, you can navigate by neighboring receivers, but not by satellite dishes that "look" at their satellite.

1. In the menu, you need to enter the manual setting, after selecting DTV (digital television);
2. Enter the channel number or its frequency by typing from the remote control;
3. Two indicators will appear at the bottom of the menu, displaying the intensity of the television signal and its quality. Sometimes there is one indicator;
4. In the presence of even a slight signal, you can begin to turn and move the antenna in order to achieve its amplification. An instant reaction when changing the position of the receiving device is not worth waiting for. It will show up in a few seconds. The search should be carried out stepwise, with pauses. When the antenna is outdoor, it is difficult to do it alone, it is better to take an assistant;
5. Immediately after the appearance of a stable signal with a good level, you can start searching for channels and saving;
6. Channels of the second multiplex are tuned in the same way, if its reception is technically possible in the given area.

Important! If the signal disappears, then reappears with the scale filled to 100%, and this continues in turn, this means that there is no reception.

Complete lack of signal reception

This situation is typical for particularly unfavorable conditions, in low places, closed by mountains, next to high-rise buildings, with low-power towers located far away.

The search for a TV signal must be manual. At the same time, for its primary display on the indicators, you need to show patience and endurance, having tried different methods:

1. Purchase a powerful active antenna;
2. If there are other towers nearby, you can sometimes try a manual search on the TV set to alternate repeaters. Perhaps the signal passing conditions will be better;
3. A good effect is to raise the antenna to a height using a mast;
4. When the TV tower is located close, and the house is located in the center of a densely built-up area with high-rise buildings, one should not rush to buy an expensive powerful receiving device. It is better to experiment with the reflected signal by alternately directing the antenna in different directions to neighboring buildings or placing it on the roof.

Tuning via receiver

Old TVs, models without built-in tuners with DVB T2 support, require tuning through the receiver.

CRT TVs are connected to a digital set-top box with RCA cables, LCD models with an HDMI cable. In the first case, the AV mode is selected during setup, in the second, HDMI. The mode is selected from the TV remote control. On the remotes, the choice of modes is located under different buttons: INPUT, SOURCE, VIDEO, just a rectangle with an arrow.

Subsequent setting is carried out using auto-search or manually using the set-top box. The antenna must be connected to the set-top box.

Receiving a digital television signal on a conventional antenna is an easy way to provide yourself with a high-quality picture, requiring minimal financial costs and physical effort. With the development of the network of TV towers, the signal reception conditions will improve.

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