GLOSSARY
Accuracy......................................A measurement deviation from a calibrated standard.
AGND..........................................Analog Ground.
BW (Bandwidth) .........................The frequency band in which a system can process information. Also known as the
3dB point.
BIT ( Built-in test) ......................Digital output that will indicate if a fault condition exists.
Carrier Frequency .....................Reference or excitation frequency required by the synchro or resolver device
and the converter.
Coarse Angle...............................In a two-speed system, the reading from the synchro or resolver with a 1:1 ratio.
Differential..................................Input signal that is with respect to another signal (S3-S1), but not to ground.
Direct Input (sin/cos) ..................Input signal that is with respect to ground.
Fine Angle...................................In a two-speed system, the reading from the resolver with a 1:N ratio, where N >1.
GND ............................................Digital Ground.
J-lead...........................................The lead of a device that is J- or hooked-shaped.
Line-to-Line Voltage...................The measurement (in Vrms) between two signals.
Measured Angle ..........................The analog synchro or resolver signals representing a position that is converted to
a digital word or angle.
Reference ....................................Excitation for synchro or resolver device and converter.
Resolution ...................................Number of bits available for measurement or simulation.
Resolver.......................................Type of transducer whose four-wire output has a direct relationship to the angular
position of the shaft. A resolver contains two output windings
90
°
out of phase.
RPS(Revolutions per second) .....A unit of measure for velocity or tracking rate.
Simulated Angle..........................The digital word or angle to be converted into analog signals representing a
synchro or resolver positioned at that angle.
Speed Ratio .................................The ratio of coarse to fine in a two-speed system.
Synchro .......................................Type of transducer with a three-wire output having a direct relationship to the
angular position of the shaft. A synchro contains three output windings 120
°
out
of phase.
Tracking rate...............................A velocity or speed at which the converter can monitor the changes of the signal
output.
Data Device Corporation
SB-3622X Manual
68
Summary of Contents for DRC-11525
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