A fiber-optic transmission system includes a transmitter having a designed chirp value. In order to improve the connection between cylinder floor and function block, the cylinder floor has at least one cylindrical outer connection area into which the pressure medium lines that lead to the work chambers open to the outside and onto which the function block is placed and attached with a sealed through-hole, into which the pressure medium lines of the function elements open. The servo horn has a servo horn base from which the horn output shaft protrudes, the horn output shaft being above and coaxially to the shaft bore, an operation unit having a shaft bore engaging the horn output shaft, and an angular adjustment mechanism for linking the shaft bore of the operation unit to the horn output shaft so as to movably fix circumferentially and at an arbitrary angle.