A cover for a bone fixture, including a recess to receive an abutment, implanted into a skull of a recipient, the bone fixture being a part of a bone conduction hearing prosthesis. A mounting ring is arranged to engage the reflector around and near its edge region. The watermarking signal may be signed by the secure server utilizing a random number generated in andor provided by the particular system-on-chip. Thereafter, the oscilloscope automatically analyzes the input signal, independently from any user input, utilizing each of the triggering modes and the trigger parameters specified for each of the triggering modes.