GPIB Timeout Setting

Hi,

I am implementing a software control to a GPIB instrument using a loop to poll on the response data.  In the Measurement Studio, I have set the GPIB I/O timeout to 10 seconds.  But, at the real test, the timeout only measures about 2-3 seconds.  (I was using the NI Spy to capture the function call).

I want to ask if anyone had similar situation and I want to ask why the GPIB I/O timeout setting does not seem work?!

Thanks.

Peggy