An improved electronic camera is disclosed which enables higher light-detecting efficiency of the electronic image pick-up device and reduces focusing errors in the periphery of the image field. ECM messages that are included in the stream and contain the control words that is required for decrypting nearby content data. A motion detector arrangement preferably comprised of one or more microelectromechanical accelerometer devices generates signals corresponding to motion of the position indicator support member as it is moved along the item. Heat sources may be used to heat the formation. This heats the substance in the well, which is detected to determine a property of the substance.