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if
(status<VI_SUCCESS) {
printf ("Could not open a session to the VISA Resource Manager!\n");
returnstatus;
}
/* Find all the USB TMC VISA resources in our system and store the number of
resources in the system in numInstrs.
status = viFindRsrc (defaultRM, "USB?*INSTR", &findList, &numInstrs,
instrResourceString);
if
(status<VI_SUCCESS)
{
printf ("An error occurred while finding resources.\nHit enter to continue.");
fflush(stdin);
getchar();
viClose (defaultRM);
returnstatus;
}
/** Now we will open VISA sessions to all USB TMC instruments. *
We must use the handle from viOpenDefaultRM and we must
* also use a string that indicates which instrument to open. This
* is called the instrument descriptor. The format for this string
* can be found in the function panel by right clicking on the
* descriptor parameter. After opening a session to the
* device, we will get a handle to the instrument which we
* will use in later VISA functions. The AccessMode and Timeout
* parameters in this function are reserved for future
* functionality. These two parameters are given the value VI_NULL.*/
for
(i=0; i<numInstrs; i++) {
if
(i> 0)
{
Digital Oscilloscope Series
*/
203
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