Note the location of the antenna. An important role in the reception of the signal plays and the height at which the antenna is located. It does not matter whether it is radio or television. To enhance the indoor antenna, place it as high as possible. If the telescopic antenna for best signal reception it should be fully disclosed.
See where a directional antenna. If between it and the signal source there are obstacles, of course, reception will be poor. Try to place the antenna so that her path was not a large tree, tall buildings, power lines or any other design, can seriously interfere with the signal reception. Thus you can strengthen the antenna.
Use the booster antenna to make the antenna more powerful. This is a special device, which makes the signal reception. Also try to use an additional ground wire. The power to the antenna this will not change, but the signal will be clearer. Any antenna is an open oscillating circuit. The larger the area of a contour, the greater ability of the signal reception it has. The antenna can be any long wire. Clip it to your indoor antenna. This will increase its area, and hence power.
Use last resort, if none of the above methods did not help. Replace the indoor antenna outside. External antenna is much better suited to high-quality signal reception, especially as there is a lot more options to configure. Point the external antenna in an optimum signal receiving direction. This will save you from the need to constantly adjust it, as it often happens in the case of operating an indoor antenna.
Advice 2 : How to improve the image quality of the TV
After buying a new TV after a while often have a feeling that the picture he has some kind of "different". And if the exact configuration of the channels and cleaning the screen from dust positive effect is not given, the output is only one – the parameters of the imageset in the store for your viewing environment of TV programs are not suitable. Let's look at a few professional steps "unprofessional" basic settings image at home.
You will need
- To setup you need a working remote control, user manual, DVD player and DVDs with high-quality recordings of several widescreen films, so when playing from top to bottom of the image were dark bands). You can do without the player, and setting to carry on one of the TV channels, but it is not very convenient.
Connect the player to your TV, start watching the movie and menu settings.
Adjust the brightness of the image. This is done as follows. A pause in the playback at the frame with about an equal amount of dark and light areas. Increase brightness to maximum and gradually lower it until the strip at the top and bottom will not become black. If individual parts in the frame have become thus indistinguishable, then add a bit of brightness.
Adjust the contrast. The setting is done on the image with a white object and visible dark parts (snow and trees, crevasses, etc.). Increase the contrast to maximum. Then begin to gradually reduce it. Lock level when dark details will become blurred, and slaborazvitym. Then start to increase the level to obtain a normal image.
Adjust the color saturation (chroma). Best setting to produce a frame with a human face. Increase the saturation to get "superzagar" face, and then reduce to natural colors, no redness in the wrong places.
The tint setting color and sharpness. The most appropriate parameters 50 (color) and 0 (sharpness). Change only if clearly needed.
Be careful with the settings of brightness and contrast, higher values of realism to the picture is not added, the lifetime TV will not increase, but the sight to spoil you can.
As TV viewing happens mostly in the evening before to carry out manipulations with the image settings, select the room appropriate lighting mode. And for day use preset modes (normal, vivid, standard, etc.) that are made by the manufacturer.
Advice 3 : How to make an antenna booster
Receiver, operating on ultra-short waves, have become a common phenomenon. We use a radio at home, in the country and even in the car. But when you delete from a broadcasting station signal quality deteriorates considerably. It is not always possible to establish an efficient receiving antenna, so the solution is to use an antenna amplifier. If you know how to handle a soldering iron and understand fundamental electronic circuits, you will be able to make such an amplifier with his own hands.
Familiarize yourself with the concept of the antenna amplifier. It is made on a low noise transistor that provides a gain of about 20 dB. At the entrance of cascaded low pass filters with a cutoff frequency of 115... 120 MHz and high-pass filter with a cutoff frequency of 60... 65 MHz. This allows you to amplify the signals of broadcasting stations operating in the VHF range.
Make a list of the required parts. In addition to the transistor you will need a few resistors and capacitors, and inductors. The parameters of the elements shown in the figure to step 1.
Take the transistor type КТ3120А or КТ368А (the second option is less preferable). It is desirable to use the device imported capacitors with similar parameters of the domestic K10-17. Resistors types of MLT, C2-33 to the amplifier will be quite apt. Wrap coils of wire sew, using a mandrel with a diameter of 4 mm. Spool contains 3.5 coils L1 and L2 and 4.5 turns of wire.
If you plan to use the amplifier in a car the receiver, add in a scheme of two relays and an additional filter for food. When power is applied, both relays include an amplifier between the antenna and receiver. When power is off the receiver input is connected with the antenna. Version of the car amplifier will definitely provide the metal body.
Prepare for the installation of elements of the device printed circuit Board made of fiberglass, foil on both sides. Figure printed tracks may be different (depending on your chosen layout details). The second side of the Board Express metallic and connect the foil on the circuit with the common conductor of the top side. Cost for automotive embodiment of the amplifier run more elongated, so it was able to easily accommodate the power supply filter and relay.
Assembled amplifier turn on between the receiver input and antenna socket, wherein the compound is run as short as possible shielded cable. When installing the unit in the car, place it near the receiver in a shielded casing.
Check out how effectively the device amplifies the signal. If necessary, reduce the capacitance and increase the inductance of the coils (but not more than half). Keep in mind that in a city where the level of radio signals is high, the antenna amplifier should be switched off to avoid signal distortion.
Advice 4 : How to choose the antenna amplifier
In zones of uncertain reception of a television signal users have to take measures to improve the quality of sound and image on their own. One possible solution to this problem may be the antenna amplifier. In terms of DXing such a device in most cases leads to a significant improvement in image quality. When selecting the antenna amplifier, it is important to have an idea about its features and principle of operation.
For reliable reception of a television signal amplifier must assume the installation at a distance, as close as possible to the receiving antenna. This power must be supplied via a coaxial feeder cable through the appropriate junction.
Make sure the antenna amplifier has the ability to connect the adapter (power pack) power up to 10 watts. This is especially important when connecting the amplifier to the television receivers imported.
Note the gain of the device. With an average cable length of 25 m, taking into account possible losses and signal attenuation should select a device with gain of 25-35 dB. If the gain is too large, and the antenna is poorly aligned with the cable, on the screen of the receiver will be just a blur.
Find out what the noise antenna amplifier. This feature needs to be significantly below the noise of a television receiver.
To receive broadcasting in the meter range select the antenna amplifier of the type UCDI-1, designed for 12 channels. It has built-in power supply for 220 V. the gain of the signal device is at least 12 dB.
When using receivers that provide broadcasting in the UHF band, use special amplifier UHF. You need to install it directly on the mast of the TV antenna. Having a gain of 14 dB, this device can surely amplify the signals of 20-40 channels.
One of the parameters relevant for signal amplification, is the diameter of the cable insulation. If the length of the feeder reduce the substantial use when connecting the booster cable with the largest diameter of the insulation. Antenna amplifier allows you to use feeders great length that in the absence of the amplifier would lead to a weakening of the signal to the level necessary to make a high-quality signal.
Advice 5 : How to increase antenna signal
To improve the quality of the received image and to catch previously inaccessible channels, do not have to buy a new powerful antenna. The receiving ability of the antenna depends on various external factors, from shape and structure, changing which can adjust the image quality.
The quality of the television signal depends on the location of the antenna. Concrete walls, metal fences and structures hamper the signal, so it's often a outside the house, on the wall or the roof. If you know where is the nearest transmission tower, the antenna should be deployed in her direction.
In General, the setup often requires a certain amount of time and effort. Need to move and twist the antenna, while continuously monitoring the image quality.
You can use two or more antennas to receive a clearer signal. They are located as high as possible, at the same distance from the switch.
Change the design of the antenna
Almost any antenna can be connected to dedicated TV signal amplifier. It works on 220V, to buy booster can in most electronics stores. For a correct choice it is important to know some parameters: the noise factor (it needs to be as low as possible, preferably less than 2 dB), the gain Ku (calculated on the basis of the presence of branching of the cable and its length).
Most often the antenna design is thought through, given standard air. You can edit it by using any metal object, a conductive current: wire, cable, balcony dryers, radiators, etc. are best suited aluminum and copper objects with a large surface area. Metal objects are not in contact with the antenna, by contrast, interrupt the signal.
Some antennas require a special configuration before use. You should verify that the correct frequency range on display to make a particular signal.
The effect of common-mode grille
If you take several identical antennas and spread them horizontally and vertically so that the phase of the signal was in one and the same, it is possible to achieve significant amplification. For example, if a single antenna gives the ratio of 7 dB, the double — up to 10 dB, consisting of four parts — up to 12 dB, etc.
Basic rules-phase lattice parts can be purchased or made their own, but not necessarily the same. It's important to "floors" and "rows" was completely symmetrical, with equal length lines, cable jumpers. Used for fixing frames made of insulating materials, such as wood or plastic.