A walking system for moving a load over the ground includes a substructure having laterally spaced-apart, rigidly interconnected main beams for carrying the load above the ground. A first mechanism is used to suture the needles and to pull test the needles to determine if certain maximum and minimum pull test requirements are met. The IP LNB assembly may communicate the determined location information andor the determined time information to a wireless communication device for determining location information of the wireless communication device. A pair of transresistance amplifiers are driven by control lines to achieve these matched currents.