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TV in the car

For those who have become the second home, those who can not live without a TV, and those who like to install electronic devices in the car -Dedicated .

Now when digital television firmly settled on the air, viewing the TV show during a trip to the car does not represent any particular problems, it is enough to buy a TV in the car, a special car DVB-T2 receiver and antenna - so it is so - but! There is always this thing - but!

I will give a very few theory, not even theory and such a light excursion to the basics of receiving digital television.

DVBT2 standard. Appeared in 2009, which replaced DVB-T. DVB-T2 2 times more efficient than old DVB-T and 16 times more efficient than analog television. It is understood that DVB-T2 allows you to transmit 16 programs, DVB-T transmits 8 programs, and analog one in the same frequency range. The DVB-T signal and an analog television signal will behave completely differently when the television signal is removed from the translator. If you imagine that we are moving by car in which digital and analog TVs connected to the same automotive antenna are installed, in an absolutely level area without trees and buildings, and the television tower broadcasts us two signals - analog and digital DVB-T2. We will see how the digital and analog signal will change, when deleting from the transmitting station. While we are in the zone of confident reception, digital television It will work stably, regardless of whether the car rides or stands on the spot. At a speed of 100 km / h, sometimes breakdowns can be observed (features of digital TV in the car). Analog television,it works well only if the machine is worth it. When driving, the image in an analog signal can become muddy, split, color disappears, and other defects occur. When our car leaves the zone of confident reception, we will find that the digital signal disappeared, crumbled on the "squares". In this case, an analog television signal can still be taken, but when you delete from a television tower, the signal will become more worse - white and black points will appear on the TV screen, the color will completely disappear, the sound will break. This is the feature of the reception of digital television: either it is, or not. When the analog television disappears gradually, the digital stops working immediately after leaving the zone of confident reception.When moving a car in the city, the reception of digital television is difficult not only to the shielding of a television signal with buildings and other cars, but also that the car changes the trajectory of movement, turning in different directions. Immediately, I want to note that the so-called reflected signals (Cigal, which is reflected from various obstacles, at home, etc.) for non-digital television receivers - unlike analog television.

Automotive antenna

To receive a television signal by car typically use an antenna, which is fixed in wind or rear window. These antennas are a frame, or two bandage dipole,

If you install four such antennas, in the front, back and side windows, it will significantly improve the quality of the received signal especially when the car is moving. You can apply antennas with a circular pattern of orientation - antenna of the crown.
In this case, a single antenna is sufficient. Such antennas include a ring dipole and a vertical pin.