The most recent version is the Model EXCITER Aural Exciter and Optical Big Bottom. The exciter has stationary field coils and a rotating armature (power coils). HD Radio transmitter, with the digital exciter, importer and exporter providing the digital signal component. The aural exciter adds phase shift and musically related synthesized harmonics to audio signals. The field winding can also be excited by a brushless exciter. It is used mostly in high-energy DC circuits, like the exciter field of an alternator. The C-QUAM exciter replaces the crystal stage in an AM transmitter. The signal at each element is digitized by the receiver/exciter. The Aphex aural exciter was one of the first exciter effects. The analog portion contains the exciter and the receiver. Each beam former has a receiver/exciter connected to it. Each subarray has its own digital receiver/exciter. Generally speaking, a PESA uses one receiver/exciter for the entire array. The wire supplying the field current is often referred to as the "exciter" wire. The B-sides from "Exciter" as well as the single version of "Freelove" are included.