A circuit verification method propagates a fixed logic value from a black-box circuit block without logic information to a subsequent-stage circuit, by taking into consideration timing information. The data sequence conversion means arranges the first data to be transmitted, in a predetermined order correspondingly to two or more sub-carriers orthogonal to each other on a frequency axis. The clamp permits particularly safe, minimally invasive percutaneous interventions, especially in the area of the spinal column. The position sensor verifies the optical slot detectors at every run and provides calibration of flexible volumes as the fluid travels via the annular passage. The electrode can be configured to substantially conform to the tissue proximate the tissue opening. The snowboard binding is coupled between a strap and a binding frame.