A method of operating a mobile station in a WCDMA system. The mobile station has a rake receiver (90) having a plurality of demodulator fingers (71,72,73). One of the demodulator fingers monitors a neighbouring cell and other demodulator fingers monitor an assigned cell. When the mobile station is in an idle mode, if it is stationary, activity of the demodulator is reduced by switching off the demodulator finger which monitors the neighbouring cell.