64 Agilent InfiniiVision 3000 X-Series Oscilloscopes Programmer's Guide
3 Getting Started
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"
Using :AUToscale to Automate Oscilloscope Setup
The :AUToscale command performs a very useful function for unknown
waveforms by setting up the vertical channel, time base, and trigger level
of the instrument.
The syntax for the autoscale command is:
myScope.WriteString ":AUToscale"
Using Other Oscilloscope Setup Commands
A typical oscilloscope setup would set the vertical range and offset voltage,
the horizontal range, delay time, delay reference, trigger mode, trigger
level, and slope. An example of the commands that might be sent to the
oscilloscope are:
myScope.WriteString ":CHANnel1:PROBe 10"
myScope.WriteString ":CHANnel1:RANGe 16"
myScope.WriteString ":CHANnel1:OFFSet 1.00"
myScope.WriteString ":TIMebase:MODE MAIN"
myScope.WriteString ":TIMebase:RANGe 1E-3"
myScope.WriteString ":TIMebase:DELay 100E-6"
Information for Initializing the Instrument
The actual commands and syntax for initializing the instrument are discussed in Chapter 5,
“Common (*) Commands,” starting on page 161.
Refer to the Agilent IO Libraries Suite documentation for information on initializing the
interface.
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