A circuit for providing phase shifted I and Q output signals from a received FSK modulated signal and the method of its operation. The flange disc has blind pocket recesses that are recessed into the flange disc from one or both axial sides thereof. When the mechanisms are in use, the sample is introduced into the first measurement channel and propagated by way of the first measurement channel towards the microstructure. The content is classified and stored in a scrap book of the sub-category.