GTCO Super L III - Users Guide - Manual (Page 11)

Super L III 11
To cancel a menu selection before it is complete, digitize a point in the tablet’s main
active area. Three long beeps will indicate that the SuperSet selection process has
been aborted. The proximity light on the tablet will also flash three times.
4. Run the corresponding application program on your computer.
NOTE: Hardware flow control is not support by the Super L III Controller. If you have an
application that requires this option, contact GTCO CalComp by Turning Technologies for
alternatives.
Flow Control
Flow control is the process of regulating the traffic or flow of data between two RS-232C
devices. Flow control prevents the transmission and subsequent loss of data if the receiver
is not ready to accept it. Examples of devices that use flow control are: a printer to signal
buffer full; a modem to indicate carrier detect; and a time-shared computer that services
multiple users on a time-available basis.
There are two kinds of flow control:
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Software flow control is often used over communication links where only a 3-wire cable
is used (Transmit Data, Receive Data, Ground) or over telephone lines. The sending device
(such as the Super L III) will immediately stop sending data when it receives an ASCII XOFF
character (CTRL-S, hex 13). Transmission will resume when it receives an ASCII XON
character (CTRL-Q, hex 11). Character flow control will work with the straight through cable
and the null modem cable.
■
Hardware flow control is not commonly used with digitizers and is therefore not
supported by the Super L III Controller. Contact our Technical Support Department if you
have hardware flow requirements. Flow control may not be needed when a terminal or
digitizer is directly connected