Consistent with the present disclosure, circuitry may be provided in an optical receiver that can determine a bit error rate associated with an incoming signal by dividing the number of errored bits in a frame alignment signals by the number of bits in the FAS. Member identification information is received from a user via the user interface. If the connection between the sensor and user interface is by a wire, the sensor remains powered when the wire is disconnected. Once transformed, the D-pipeline stages are executed in parallel within the D-stage processor pipeline. The internal cavity is dimensioned to receive the ball of the tibial component.