http://www.sgi.com/products/appsdirectory.dir/Applications/Animation/ApplicationNumber7168.html (Silicon Surf Promotional CD, 01/1995)Extended Range Transmitter (ERT). A long-range transmitter designed to boost the Flock of Birds(tm) range to plus or minus eight feet. In conjunction with a multi-receiver Flock unit, it provides full-body tracking over room-sized areas for VR walkthroughs, motion analysis, and character animation. A single-transmitter reference point eliminates calibration/alignment problems in operating over long distances. For long-range performance, multiple ERTs may be linked together.
Jack Scully
Vice President Ascension Technology Corporation 74 Ethan Allen Dr. Ste. 103 P.O. Box 527 S. Burlington, VT 05402 USA 802-860-6440 fax:802-860-6439 ascension@world.std.com