GP-9

GP-9 is a line of computer input devices from Science Accessories.

The GP-9 uses acoustic tracking. Therefore, certain environmental conditions interfere with digitizer performance. Common conditions that can cause interference are:

• Sonic burglar alarms
• Sonic automatic door openers
• Temperature changes or hot/cool air blowing across the work surface
• Strong winds blowing across work surface
• Direct sunlight or a heatlamp on the work area
• The sound of jingling keys will cause the digitizer to pause and wait for the jingling to end.

References

• "GTCO Corporation, (say "gee-tee-co")". https://web.archive.org/web/19970119152054if_/http://www.gtco.com/help.html.