User`s guide

Glossary CARROLL TOUCH
GL-4 Touch System Diagnostics (CTDIAG) User’s Guide
opto-pair An infrared light-emitting diode (LED) matched with a
phototransistor and set opposite one another in an infrared touch
frame (opto-matrix frame) and pulsed sequentially so as to send
and receive a single beam of infrared light. See beam.
parity A parameter used for error-checking to ensure that the data that
was transmitted by the serial peripheral is identical to that
received by the computer, and vice versa. This is a
communication parameter used by the RS-232 controller.
physical beam An infrared light beam passing between an LED/phototransistor
pair. See beam.
physical coordinates A coordinate system consisting of an x- and y-axis, each made up
of physical beams. The origin of the coordinate system is the
upper left corner of the display/touch screen.
physical frame size The actual number of opto-pairs (beams) that make up each axis
of the infrared frame. See beam, logical frame size.
READ.ME A file on the installation disk that contains additional or
late-breaking information that could not be placed in this guide.
RS-232 controller See serial (RS-232) controller.
SBC See software-based controller (SBC).
SBC driver A software program that interfaces with the software-based
controller via a selectable I/O address and hardware interrupt and
with the application via TAPI.
scan reporting One of two methods that determines the form used to send data
from the touch system to the host. The touch system reports a list
of physical beams that are interrupted in each axis. See also
coordinate reporting.
scanning infrared
technology
See infrared touch technology.
serial (RS-232) controller A touch-system-independent, digital controller containing a
microprocessor. This controller requires an external +12V power
supply and communicates using a standard RS-232 serial port.
SFP See Smart-Frame Protocol (SFP).
Smart-Frame A Carroll Touch touch frame with built-in serial (RS-232)
controller.
Smart-Frame Protocol
(SFP)
A Carroll Touch proprietary set of commands and reports used to
communicate with Carroll Touch touch systems. This protocol is
used by virtually all Carroll Touch infrared touch systems.