A bias current IB additionally provided to a current-controlled circuit 13 in a PLL circuit is the sum of bias currents IB1 and IB2 which are generated by a bias adjustment circuit and a bias current generating circuit, respectively. First, second, and third support elements are spaced apart on the frame for supporting the base face of the prism, suspending the clear aperture. Certain embodiments of the access device comprise an elongate body having a distal end with one or more cutouts. Such wireless interfaces or connections may also be utilized between various sensors or input devices and indicators or readouts and the controller as well as between any other components in the system.