Oscilloscope Probe is a physical device used to connect electronic test equipment to the device under test (DUT). Because of the high frequencies involved, oscilloscopes normally don't use simple wires to connect to the DUT. Instead, a specific scope probe is used. Oscilloscope probes use a coaxial cable to transmit the signal from the tip of the probe to the oscilloscope, preserving those high frequencies that are so important to accurate oscilloscope operation.