The high-density DSP-based 74SD3 includes eight independent, programmable Synchro/Resolver tracking converter measurement channels. Each channel has 16-bit resolution, ±1 arc-minute accuracy, tracking rate to 150 RPS, accurate digital velocity output, and wrap-around self-test.
Channel pairs can be programmed for any two-speed ratio between 2 and 255. The unit requires a single 5 volts DC (or 3.3 volts DC) power supply, operates over a frequency range of 60 Hz to 10 KHz, and has an autoranging input range from 2Vrms to 28Vrms.
Each channel can be programmed individually for synchro or resolver operation and for a bandwidth setting up to 1200 Hz. The 74SD3 synthetic reference compensates for up to ±60-degree phase shifts.
The 74SD3 provides continuous background Built-In-Test (BIT) on all functions and channels, including reference loss and signal loss detection. The BIT is totally transparent to the user, requires no programming, and doesn't interfere with the normal operation of the card.
Each Synchro/Resolver-to-Digital Converter channel is self-calibrating, without requiring removal of the card. The 74SD3 PMC card is ideally suited for military and commercial programs, including airborne, shipboard, ground mobile and C3I applications.
The 74SD3 is available with an operating temperature range of -40 85 degrees Celsius. For more information contact North Atlantic Industries online at www.naii.com.