A method for manufacturing an antenna includes steps as follows. The force sensing unit comprises: a pack of Belleville springs coupled to an end portion of the sheath and arranged to deform as a result of the tension force applied by the actuator unit on the operating cable; and a Hall position sensor for detecting the displacement of the end portion of the sheath as a result of the deformation of the pack of springs. It then encrypts the data to be transmitted with the new symmetrical key and transmits to a display device, via the network: the data encrypted with the new symmetrical key, the random number, and the first encrypted symmetrical key with the second symmetrical network key. Story characteristics are based on direct or indirect characteristics. The quick connector with locking device replaces a conventional bolted connection and reduces the time necessary to remove and reinstall a knife on a rotary cutterhead compared to a bolted knife connector while improving knife retention compared to known quick-change knife connection mechanisms. These embodiments further comprise a separate set of busses coupled between each of the server nodes and the multi-node management mechanism and a controller in the multi-node management mechanism, the controller being coupled to each bus in the sets of busses.