hi. i am using the measurement computing gpib controller cb7210.2 which is ni compatabile.i am interfacing it with a microcontroller connected to the pc.Then i am trying to use a monitor program that is embedded in the microcontroller to perform remote access of instruments. i have managed to communicate with the instrument.now the problem is that i cannot make the distinction between data commands and interface commands.for eg if i send 3Fh and atn happens to be 1 this is interpreted as UNL if atn is 0 data command.i need to be able to have control when to send either right now i do not.
thanks again
