A method of inspecting equipment to ensure quality control that employs a computer program to assist in the inspection. A scribe tool 30 is attached to one end of the holder 20. A tissue characterization module compares the normal and oblique incidence frames of data to determine at least one property parameter of a scanned medium based on amplitude differences between the receive beams. Based on determining that the at least one code change is potentially malicious, the computing device may generate a notification indicating that the at least one code change is potentially malicious. The conductive layer is an n-electrode. The preamble information is communicated via the first transceiver to the second transceiver via the communication channel.