Programming Guide

SIGLENT
SDL1000X Programming Guide 66
Debug.Print "Could not open a session to the VISA Resource
Manager!"
Usbtmc_test = status
Exit Function
End If
' 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, numlnstrs,
instrResourceString)
If (status < VI_SUCCESS) Then
Debug.Print "An error occurred while finding resources."
viClose (defaultRM)
Usbtmc_test = status
Exit Function
End If
' 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 To numInstrs
If (i > 0) Then
status = viFindNext(findList, instrResourceString)
End If
status = viOpen(defaultRM, instrResourceString, VI_NULL, VI_NULL,