A pressure pulse sensor and associated methods provide enhanced functionality and convenience in detecting pressure pulses. The method may include receiving, by a base station, a control message from a user equipment. When a sub-microprocessor 360 inputs from the shuttle operation member 170 signals representing operating direction and operating angle, on the basis of these signals, it determines a zoom direction and zoom speed, and by giving an instruction to a lens control microprocessor 127 or a picture signal processor IC 300, performs optical zoom or digital zoom.