The 2779500 is compatible with virtually any resolver while the 2779501 interfaces with Heidenhain and Farrand inductosyn scales without rewiring. The 2779501 excites the slider with sine and cosine excitation and uses the phaseshifted preamplified scale return to generate the A-quad-B signals. The 2779 Series come standard with RS-422-A differential drivers. A-Quad-B is the default configuration with Z-channel index occurring once per transducer cycle.