Aiming at the problem that some brand car burglar alarms caused by the disturbance caused by the disturbance, the Quanzhou Radio Administration Bureau conducted interference tests on the burglar alarms of various brands of cars.
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Car alarm is a technical defect or peripheral interference
Related technical tests show that the car burglar alarm uses frequency bands of 315.000-316.000MHz and 430.000-432.000MHz. The radio bureau's technicians tested the launch signals of dozens of car burglar alarm remotes on site. The test results show that the frequency of the signal transmitted by the remote control is mostly concentrated between 314.800 and 315.512 MHz. There are three main types of signal transmission of the remote control, that is, the normal transmission (the signal occupies a certain frequency for a long time), the interval transmission and the pulse transmission. (only fire once). At the same time, it was found that if the remote control is pressed for a long time and its transmitting signal status is normal, it will cause other burglar alarms using this frequency to be unable to be used normally.
The technical personnel of Quanzhou Radio Administration Bureau believe that the main reason for the interference of the car burglar alarm is that the frequency used by the surrounding radio transmitting equipment is similar to the working frequency of the car burglar alarm. The equipment causing the interference is: indoor burglar alarm, infrared Anti-theft alarm, car burglar alarm itself, artificially modified car burglar alarm, etc. Proper use of the remote control is an important part of eliminating the malfunction of the adjacent car burglar alarm. The public should use the remote control or the pulse transmission method to use the car remote control. Do not press the remote control for a long time.
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