User Manual Part 1

IS-900 User Guide Page 22 of 159
1.7.2. MicroTrax Head Tracker
Figure 10 - MicroTrax Head Tracker
The MicroTrax Head Trackers (Figure 10) are tracked devices that provide accurate 6-DOF data
needed to give the user a correct visual viewpoint in an immersive visual environment. The
MicroTrax head tracker is suitable for use in both projected (Simulators, CAVE®s, PowerWalls,
etc…) and head worn (HMDs) application where head tracking is required.
The device powers on by pressing the button for ~ 3seconds. The unit will auto-off after 10
minutes of no movement to preserve battery power. To shut the unit off, press and hold the
button for 6 seconds.
There are two miniature acoustic receiver microphones integrated into the MicroTrax Head
Tracker. During operation, all miniature microphones are sampling the ultrasonic signals. Each
miniature receiver microphone has a reception cone angle approaching 180°.
The MicroTrax Head Tracker has the receiver microphones placed at a 45° angle off the front of
the device assuring continual tracking with all normal head positions in standard ceiling or wall
mounted Constellation arrays. The head trackers will continue to track during brief (less than 1
minute) occlusion of one of the microphones.