Patent ID: 6311044
Filing Date: 2001-10-30
Classification: H04B

Abstract:
A method for determining failure mode of a transceiver, comprising the steps of:applying a control signal at a predetermined voltage level to a power control input of an amplifier in a transmitter portion of said transceiver;detecting a power level of a transmit signal at an output of said transmitter and producing a transmit power level indicator corresponding to said power level of said transmit signal, wherein power level of said transmit signal is proportional to said predetermined voltage level of said control signal;coupling said transmit signal to produce a coupled transmit signal;receiving said coupled transmit signal by a receiver portion of said transceiver;producing by said receiver a receive signal strength indicator corresponding to a power level of said coupled transmit signal; andcomparing levels of said receive signal strength indicator, said transmit power level indicator and said predetermined voltage level of said control signal to determine a failure mode of said transceiver, wherein said failure modes include a failure of said receiver, said transmitter, and said receiver and transmitter.