Abstract: A sensor system includes a microelectromechanical systems (MEMS) sensor, a processor, measurement circuitry, stimulus circuitry and memory. The MEMS sensor is configured to provide an output responsive to physical displacement within the MEMS sensor to the measurement circuitry. The stimulus circuitry is configured to provide a stimulus signal to the MEMS sensor to cause a physical displacement within the MEMS sensor. The measurement circuitry is configured to process the output from the MEMS sensor and provide it to the processor. The processor is configured to generate stimulus signals and provide them to the stimulus circuitry for provision to the MEMS sensor. The processor is configured to monitor the output from the measurement circuitry corresponding to the physical displacement occurring in the MEMS sensor, calculate MEMS sensor characteristics based on the output, and update calibration values based on the output. Methods for monitoring and calibrating MEMS sensors are also provided.

Abstract: An apparatus for, and method of, range-testing a cordless communication device. The device has a first portion adapted to communicate with a second portion via a signal carried on a wireless channel, the signal subject to attenuation as a function of a distance separating the first and second portions.