Integrated error checking ensures accurate communication of responses and control functions. The keypad design uses 900 MHz frequencies for controlling the keypad and communicating key presses to the Base Station. A radio transmitter in the keypad sends keypress information to Base Station's receiver. Transmitter is crystal referenced and frequency synthesized with FM modulation. A high-gain loop antenna is enclosed and protected by the keypad housing.
Range Offers superior range without external antennas.
System is designed to provide reliable operation in an area 125 feet by 125 feet. Speed Base Station exchanges data with keypads either individually, by group, or globally. Internal buffering accelerates responses. Polling cycles are adjustable to optimize speed to group size. For maximum speed, the system offers an optimization routine.