Methods, systems and computer program products for averaging measured levels from differing intervals and differing code points based on their proximity with other measured levels are provided. A distance determination module is in signal communication with the wireless access points. The storage element and bottom electrode plate are symmetric along a center line of the poly silicon layer. This enhances positioning repeatability and thus consistency in valve timing. By sensing the voltage pulse from the current-to-voltage converter, the buffer circuit can determine a storage state of the chalcogenide storage element.