Provided herein are a device and methods to obtain multiple serial samples from biologic tissues located in a tubular or cavitary space of a body. A wireless network of the invention includes an MSC system and an HLR system. The second screen displays the waveforms of the position deviations and current instructions of the drive axes in chronological order. The capacitor is operably coupled to the drain of the transistor to provide an analog signal representing an average peak to common mode value of the high frequency signal and to a circuit ground. The vertical support member may be a helix pipe pier, steel beams, posts, piers and the like. A key is then inserted into a keyway in the first and second members to lock the angular orientation, thereby coupling the first and second members to one another.