Anti=theft car monitoring system

摘要

The system has a transmitter which, after activation by a pre-activated alarm system and/or during the car operation, delivers modulated signals. A receiver/decoder, tuned to the transmission frequency and/or the coded modulation signal, receives the coded, modulated transmitted signals and supplies them to an evaluator and display unit. The transmitted signals are frequency modulated. Typically the transmitter comprises a plug position for an externally programmable microchip, in which is stored the coding for the modulation signal.