A communication interface circuit includes a register and a register setting circuit. Aiming at the objective, a relationship between asymmetry and a signal modulation depth, which are measured by use of a standard driver is referred, and thereby an offset caused by a device, a disk, a writing state of another layer and the like is compensated. The position measuring system further includes a first connector that fastens the first support to the first structural component and a second connector that fastens the second support to the second structural component, wherein the second connector includes a nut, with which a screw can be brought into engagement, wherein the nut is inserted into a recess of the second support. The histogram count can be obtained for a plurality of PVT combinations and the control signal can then be determined for each PVT combination. A method of making a core is also disclosed. A first quantity of steam is inserted into a condensation chamber, and the first quantity of steam is substantially condensed in the condensation chamber.