Program materials received from a direct broadcast satellite system are distributed between a host receiver and a client receiver for remote decryption. The saddle unit moves from a position inside the processing apparatus, along a direction orthogonal to a sheet transport direction, to a position outside the sheet processing apparatus. Multipath nulls caused by reflections of the transmitted signal can occur at periodic frequency intervals, for example in a coaxial cable. The driven pulley is preferably driven by a pair of drive belts, one being located above the sample, and the other being located below the sample. The first lens is adapted to receive regular and scattered light transmitted through the sample at a first angle of divergence. Use of iron containing sulfide scavengers in the digesters is avoided which avoids the disposal costs associated with iron containing sludge and the regular need to shut down the digesters to remove scale.