The 74SD2 is a convection cooled PMC Synchro/Resolver Measurement Board that provides eight (8) single-speed or four (4) two-speed Synchro / Resolver to Digital Converter Channels, with accurate velocity outputs. Unique programmability permits user to set each channel for either Synchro or Resolver Input, and to set the desired bandwidth per channel. This capability is most desirable for motor control applications because it gives the user total control over one of the loop characteristics. The high tracking rate and variable bandwidth of the 74SD2 enables the converters to handle high speeds and acceleration. This board is a convection-cooled version of the 74SD3 PMC Board.