User Manual Part 2

IS-900 User Guide Page 109 of 159
Station Configuration window
Station ON/OFF When a station is ON a data record will be sent for it, even if
there is no hardware connected to the base unit.
Perceptual Enhancement Level
In order to provide the best performance for a large range of
applications, three levels of perceptual enhancement are
available. None of the modes introduce any additional latency.
Mode 0 provides the best accuracy. The inertial tracker uses
gyros to measure angular rotation rates for computing the
sensor’s orientation. To compensate for the drift, tracker uses
accelerometers and an ultrasonic range measurement system
to measure the actual physical position and orientation of the
sensor. That data is then used to compute the necessary
correction. In Mode 0 correction adjustments are made
immediately, no jitter reduction algorithms are used. This
results in most accurate output (not recommended for head
tracking) with lower RMS error. Use this mode for accuracy
testing or for any application that requires best accuracy.
Mode 1 provides accuracy similar to that of mode 0, with an
addition of a jitter reduction algorithm. This algorithm reduces
the accuracy by only a small amount and does not add any
latency to the measurements. Mode 1 is recommended for
augmented reality applications (i.e. overlaying or mixing both
virtual and real objects in a visualization system.)