VME-8SD4DS Apex Signal Synchro / Resolver Module

The North Atlantic / Apex Signal VME-8SD4DS Synchro / Resolver Module contains eight separate transformer isolated Synchro/Resolver-to-Digital tracking converters, four separate transformer isolated Digital-to-Synchro/Resolver converters (1.2 VA), Optional 5 VA reference, and extensive diagnostics. The measurement channels incorporate high linearity digital velocity outputs, angle change alert and can be field configured for either single speed or multi-speed to any ratio between 1 and 255.The Stimulus channels include ON/OFF capability, common or separate reference inputs, two-speed programmability, and rotation with start and stop angles. All Measurement channels offer the unique capability to automatically gear shift to a lower resolution when the 16-bit tracking rate is exceeded. The gear shifting is smooth, continuous with no glitches. The "Latch" feature permits the user to read all channels at the same time. Reading will unlatch the channel. The use of Type II servo loop processing techniques enables tracking, at full accuracy, up to the specified rate. A step input will not cause any hang-up condition. Intermediate transparent latches, assure that current valid data is always available for any channel without effecting the tracking performance of the converters. For two-speed applications, our ambiguity circuits maintain monotonic outputs by compensating for variations of the zero positions between the Coarse and Fine Synchros. However, if the maximum allowable angle difference of 90°/n is exceeded, a flag will be set that immediately indicates to the user that the input Synchros are defective or out of alignment.