801-40 North Atlantic Synchro/Resolver Panel Meter

The North Atlantic 800 / 801 Synchro/Resolver Panel Meters are based on the proven design concepts of the Model 8800, 8810 and 8500 Angle Position Indicators. These modules are ideal for portable test sets. These models have 0.1° and 0.01° resolution and can operate directly off the rotor input, thereby eliminating the need for separate power lines. Accuracies of 0.2° and 0.03° are available. The rear panel programming makes these devices extremely versatile to the design engineer or systems integrator. Both Synchro or Resolver mode can be programmed and the unit operates over a broad frequency band of 47Hz to 1200Hz. The large 0.56" display comes in either a red or green format. The brightness of these displays makes for easy reading in almost any environment. Should the device be used in darkened environments, an optional control circuit can dim the display level.

Both models employ a Type II tracking servo loop resulting in accurate measurement, with no tracking lag error, up to the maximum tracking rate. Both the 800 and 801 also provide tristate bussable B.C.D. outputs for remote use along with a busy signal output to indicate when data is valid. Data can be transferred by monitoring the busy line and transferring data on the trailing edge of the busy pulse. An alternate method of transferring data is to apply a data freeze input pulse of at least 2 µsecond duration. A 2.0° offset adjust is provided via the rear panel to allow for system zeroing. This allows the user to compensate for deviations in system electrical and mechanical zero. A prime design consideration is reliability and maintainability of these devices. No potted modules are used, all discrete components are generically identified and test points are provided to facilitate signal tracing.