Technical data

Introduction to Programming 3

Agilent Infiniium 90000 Series Oscilloscopes Programmer's Reference 67

Initializing the Interface and the Oscilloscope

To make sure the bus and all appropriate interfaces are in a known state,

begin every program with an initialization statement. When using the

Agilent VISA COM library, you can use the resource session object's Clear

method to clears the interface buffer:

Dim myMgr As VisaComLib.ResourceManager

Dim myScope As VisaComLib.FormattedIO488

Set myMgr = New VisaComLib.ResourceManager

Set myScope = New VisaComLib.FormattedIO488

' Open the connection to the oscilloscope. Get the VISA Address from the

' Agilent Connection Expert (installed with Agilent IO Libraries Suite).

Set myScope.IO = myMgr.Open("<VISA Address>")

' Clear the interface buffer and set the interface timeout to 10 seconds

myScope.IO.Clear

myScope.IO.Timeout = 10000

When you are using GPIB, CLEAR also resets the oscilloscope's parser. The

parser is the program which reads in the instructions which you send it.

After clearing the interface, initialize the instrument to a preset state:

myScope.WriteString "*RST"