Methods and apparatus are provided to administer an investment company. Each yarn cutting needle set includes a first cutter needle and a second cutter needle movable against the first cutter needle in a first yarn cutting displacement thereof. The nitrogen-free anti-reflective layer produced by this technique eliminates the mushrooming and footing problems found with conventional anti-reflective layers. The pilot symbol or preamble portion of the access channel frame allows for efficient acquisition of the access signal at the base station, while providing a timing reference for determining the effects of multipath fading.