Hardware Configuration
Appendix A
GPIB-232CT-A for MS-DOS/Windows A-2
© National Instruments Corp.
Note:
For the purpose of this explanation, the switches have been
assigned numbers as a point of reference. These numbers do
NOT
appear on the GPIB-232CT-A itself. In this explanation,
the three switches labeled BAUD RATE are switches 1 through
3, the DATA FORMAT switches are switches 4 through 7, and
the S MODE switch is switch 8.
In Figure A-1, switches 1 through 3 are ON, OFF, and ON, respectively,
indicating that the serial port is operating at 9600 baud. Switches 4 and 5
are both OFF, which indicates that parity is disabled. Switch 6 is OFF,
indicating 1 stop bit/character. Switch 7 is ON, indicating that the
GPIB -232CT-A is using 8 bits per character for serial data transfers.
Switch 8 is OFF, indicating that the GPIB-232CT-A is operating in S mode.
Tables A-1 and A-2 show the possible configurations of the eight switches
and what each configuration indicates. The factory default settings are in
bold italics .
Table A-1. Configuration Parameters for Switches 1 through 3
Switches
1
2
3
Indication
OFF
OFF
OFF
300 baud
ON
OFF
OFF
600 baud
OFF
ON
OFF
1200 baud
ON
ON
OFF
2400 baud
OFF
OFF
ON
4800 baud
ON
OFF
ON
9600 baud
OFF
ON
ON
19200 baud
ON
ON
ON
38400 baud