Human antibodies, preferably recombinant human antibodies, that specifically bind to human tumor necrosis factor \u03b1 are disclosed. Fitted on the objective or in the immediate vicinity of the objective is a capacitive sensor in whose measuring range the sample andor a microscope slide supporting the sample is located or into which it can be brought. The communication quality estimation equipment estimates communication quality in the third equipment by comparing a number of first packets satisfying a first sampling rule out of packets transmitted by the first equipment and a number of second packets satisfying the first sampling rule out of packets transmitted by the second equipment. In response to the monitoring one or more control signal may be generated to created to modify bias level, modulation level, or both.