Learn how car alarms work

Car alarm-an electronic device that is installed in the car and protects it from theft and theft. Standardly this mechanism includes such parts:

• main unit;
• antenna;
• shock sensor;
• key ring;
• LED;
• service button.

Depending on the model, this list may be supplemented with other details.

Features of the car alarm

Car alarm can be with or without feedback. Its presence greatly improves the safety of the car. Some models are equipped with GPS and provide functions for remote control of the system.

In the earliest developments, a statistical code was used that could be easily cracked. Therefore, very soon the manufacturers had to develop a dynamic code, whose principle is much harder and harder to crack. With each action of the keychain, a new code is generated. So, it is difficult to invent a cipher for such devices. But despite the stated high reliability, fraudsters and to such car alarms have learned how to select hacking keys.

Modern security systems work on the dialogue principle: the recognition of the keychain takes place in several stages. When you press the keyfob button, the ID number is sent to the base unit, the signal is received and the keyfob's registration in the protection system is checked.

If good identification is in effect, the keyfob receives a response signal with a code that is formed in a dynamic way. If the credited code is used, the necessary command occurs in the keyfob and goes to the base unit for execution, which decodes and executes the commands, and then sends an acknowledgment of execution.

This principle of operation increases the reliability of the system and makes it almost impossible to crack a car alarm. After all, the request is sent by a random number, and this is done several times.

Customer Psychology: it is important

People who choose and buy security systems for cars are of three types:

• They want to buy something cheaper, but so that the signal was loud, there was an automatic door lock and fewer functions.
• Put autostart in priority, and the range should be as large as possible.
• The priority is to protect the car, so they choose models that are designed with the new technologies in mind.

As a rule, the latter carefully study the information before buying. Some turn to special service centers for advice. But instead of a professional answer, they can hear that if fraudsters want it, they will still steal your car. However, in the end they offer well-known products of well-known brands. Yes, they are equipped with all the necessary functions, besides having such an auto alarm is considered prestigious.

To attract as many buyers as possible and outrun competitors, such services reduce the cost. But it’s not always possible for the workers to bring the main idea-why it is necessary to install security systems. After all, not every manager or consultant will be able to tell about the code grabber, radio frequency interference and how to avoid it all.

And we proceed to practice: they mount an alarm and tell you how to turn it on and off. If many car owners agree with everything and do not ask unnecessary questions, then our “third” group does not really approve of such “professionalism”. They ask about all the small details that they rarely get a clear answer.

The less you know about such devices, the higher the risk of paying more than is required. Car alarms buy in Kiev, Odessa, Kharkov, and also with delivery in Ukraine, you can on 130.com.ua.

What to look for when buying an alarm

The presence of a protective system-the condition of your peaceful sleep. However, many use it as a regular accessory with a central lock. So, to begin with, we define the type of electronic system:

Without feedback. Equipped with a special sensor that responds to any mechanical action with a car body in the form of a siren. The disadvantage is that you can be far away from the car and not hear its sound.

With feedback. Devices are equipped with a small LCD screen, which displays the status of the car. As soon as a hijacking or theft is attempted, a siren turns on and a special signal appears on the screen.

Some cars are additionally equipped with a volume sensor that is triggered when the car is moving. A high level of protection prevents thieves from breaking the code.

The autostart function allows you to pre-warm the engine.

GSM alarm system-a device with a GPS satellite. It connects to a telephone or protective console of a special design, which monitors the level of protection of the car and, if necessary, turns off the engine. There are nuances-coverage of GPS and GSM-network. Scammers can use special jammers that will not allow you to determine the exact location of the car.

The level of machine protection depends on how long it takes to overcome these protective systems. The more time a hijacker needs to break into, the better.

Models with engine lock feature come in two forms:

volatile;

non-volatile.

So, now you need to decide on the relay: analog or digital. It is better to choose the second option, since it only works after the transmission of an encrypted signal.

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