The present invention comprises a rotor blade and method of manufacture thereof. When the block consists exclusively of information words, a master transition having a first sense is scrambled and appended to the block to form one of the frames. A fluid storing bulb has an inlet nipple adapted for receiving a fluid conduit for conducting a bodily fluid into the bulb, and has an outlet nipple adapted for expulsing the fluid collected. That particular group is then subdivided successively by a factor of 2 and alternately checked to see if it is still causing the interference until a single mobile terminal is identified as the source of the interference.