This document is limited to units meeting the definitions of para. 1.3 and covers the following general class of synchros: 26 volt@ 400 cycle synchros 115 volt@ 400 cycle synchros 115 volt@ 60 cycle synchros Under each of the above general classes of synchros the following specific type of synchros is covered by this document: Synchro Transmitter ?C Torque Synchro Transmitter ?C Control Synchro Control Transformer Synchro Differential Transmitter ?C Torque Synchro Differential Transmitter ?C Control Synchro Differential Receiver Synchro Receiver Synchro Resolver Transmitter Synchro Resolver Control Transformer Synchro Resolver Differential