Nowadays, television is one of the most important sources of information along with the Internet. Almost every house today has a TV , and often not one. Someone is looking mainly at news channels, someone prefers artistic films, others are more interested in entertainment TV shows. But in any of these cases, you need a good TV signal. This is achieved by installing a television antenna. Let's find out what these devices are like.
Features of active indoor antennas for TV
As you know, the antennas differ in several ways: the place of installation, the frequency range and the type of signal amplification.
The first criterion divides all the antennas into external (external) and indoor. Outdoor are usually installed on the roof of the house and give a good, high-quality "picture". As for the room, they are best used in the zone of so-called confident reception, because otherwise, if your area is remote from the repeater, you will not be able to bypass the laws of physics. In addition, it should be noted that the indoor antenna "catches" the signal in different rooms unequally.
So, if your home is in the zone of confident reception of a signal, then it would be advisable to choose the installation of a room antenna. But they are also different, differing, first of all, by the type of signal amplification. According to this criterion, antennas are active and passive.
Passive antenna models have the property of amplifying the television signal due to its geometry, that is, the design. They do not need to be connected to the network and equipped with additional amplifiers. The main advantage of such devices is the absence of additional interference.
However, not always a passive antenna can cope with its task. Sometimes its power is just not enough for a high-quality signal reception - in these cases, active indoor tv antennas are used. They are equipped with an electronic amplifier, so they are more sensitive. Such an amplifier can be mounted directly into the antenna housing, but can go separately. The active indoor antenna is connected via a power supply to the mains.
In addition to the obvious advantages described above, the active indoor antenna with an amplifier has disadvantages. These include signal distortion and interference due to the use of an amplifier. This is manifested by using both cheap low-quality amplifiers and very sensitive instruments with overly powerful amplification. Noise may also occur if the active antenna is used in a secure reception area where additional amplification is not required at all.
And, finally, the third criterion for choosing antennas is the range. Such devices can be banded (i.e., capable of receiving either MW or DMW waves) and all-wave devices that receive both types of signals. The latter in our time are the most popular, they are much more convenient, because different TV channels broadcast in different bands. By purchasing such an antenna, you can increase the number of channels viewed almost twice. But despite this, if you have plans
And now - a few tips on what to look for when choosing this device:
- choosing the antenna model, be guided first of all by the signal level in your home. You should never buy such devices just for the sake of the design you like;
- if the apartment windows "look" towards the repeater or the television center, you can stop on the option of the window antenna. Such a device is mounted on the glass and, although the antenna is actually room, in some cases works no worse than the outside;
- if the distance to the tower is more than 15 km, then it is better to refuse from the indoor antenna, even the active antenna, in favor of the outdoor antenna.