All FMR Receivers are crystal controlled, comprising of receiving, decoding and relay-output sections. A specially designed LARGE SCALE INTEGRATED CIRCUIT for single channel receivers or a MICRO PROCESSOR for 4 channel receivers is employed in the decoder section, which ensures operation at low supply voltage, highest reliability, associated with very low power drain.

The receiver works on a digitally encoded 27 MHz frequency modulated (FM) signal. It may be used in applications such as the remote control of garage doors, gates, lights, alarms or in any other new or existing installations where the use of conventional wiring is difficult or impossible to accomplish.

If the code of the input signal (from a transmitter) matches the setting of the coding switch on the receiver (up to 4096 combinations), an output is obtained i.e. the relay operates. This relay provides a clean set of contacts for switching DC current up to 5 Amps.

As an antenna, a piece of any type of wire, approximately one meter long, will be sufficient for a reliable control range of up to 400 metres, with any FMT hand transmitter. A longer wire or a proper 27 MHz CB-Antenna should further improve performance in reception. If a CB-Antenna is used, the shield of the cable must be connected to the "minus terminal".

The following Elsema Receivers are available from Speed: