I have an evaluation board of an A/D converter that is powered by the TD
line from the serial (RS232) port. Communication with the board is done
using toggeling/reading the RTS/CTS/DTR lines. To power the circuit I need
to set TD high, but I can't find a way to control this pin using VISA,
except sending a break, which will only power the line 250ms - 500ms.
Any tricks?
Ferry Toth
Enraf BV, Delft, Nederland