A circuit for monitoring future Universal Serial Bus activities is described. The use of poly co-polymer eliminates the need for a separate thickener. This is accomplished by a method including determining an induced fluorescence maximum of a non-linear absorption process, measuring a slope of a functional relationship representing the dependence of the radiation-dependent transmission on fluence for the induced, fluorescence and determining radiation-dependent transmissions from this slope for particular fluence values. The adjustment actuator gear engages the screw seat gear and the screw seat gear rotates in response to rotation of the adjustment actuator gear.