The BM120C and BM200C devices are digital versions of the analogue microwave beams, types BM120M and BM200M, created by combining the microwave circuits of BM120M / BM200M microwave beams made by the Italian company AVS ELECTRONICS S.p.A. with the digital signal processing module designed by STEKOP SA company. The application of digital signal processing in the BM120C / BM200C beams created completely new quality when compared to classical analogue designs. The advanced analysis of signal shape and its duration as well as automatic adjustment to environmental changes ensured high likelihood of intruder detection and increased immunity of the BM120C / BM200C devices to false alarms. Additionally, digital technology applied in the beams allowed them to be remotely monitored and configured.

The single microwave beam set is composed of two modules: the transmitter (Tx) and the receiver (Rx), both of which may operate in one of five channels. With proper selection of the working channels it is possible to design on the basis of the BM120C / BM200C microwave beams any, even the most complex, perimeter security system where all operating microwave beam sets (i.e. transmitter-receiver) do not interfere with each other. Connection of all modules in the system by the two-wire RS485 bus significantly simplifies wiring of the entire system and hence improves its reliability as well as reduces its installation and maintenance costs.

The software tool called Micro.exe is designed for remote control of microwave beams operation, on-line observation of trigger signal shapes, setting the minimal and the maximal duration times of trigger pulses and setting alarm levels.