Agilent Technologies Infiniium 90000 Q-Series, Руководство программиста

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1072 Agilent Infiniium 90000 Series Oscilloscopes Programmer's Reference
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Sample Programs
Debug.Print "Setup bytes restored: " + CStr(lngRestored)
' Set the desired number of waveform points,
' and capture an acquisition.
' -----------------------------------------------------------------
DoCommand ":ACQuire:POINts 32000"
DoCommand ":DIGitize"
End Sub
'
' Analyze the captured waveform.
' -------------------------------------------------------------------
Private Sub Analyze()
' Make a couple of measurements.
' -----------------------------------------------------------------
DoCommand ":MEASure:SOURce CHANnel1"
Debug.Print "Measure source: " + _
DoQueryString(":MEASure:SOURce?")
DoCommand ":MEASure:FREQuency"
dblQueryResult = DoQueryNumber(":MEASure:FREQuency?")
MsgBox "Frequency:" + _
FormatNumber(dblQueryResult / 1000, 4) + " kHz"
DoCommand ":MEASure:VAMPlitude"
dblQueryResult = DoQueryNumber(":MEASure:VAMPlitude?")
MsgBox "Vertical amplitude:" + _
FormatNumber(dblQueryResult, 4) + " V"
' Download the screen image.
' -----------------------------------------------------------------
' Get screen image.
Dim lngBlockSize As Long
lngBlockSize = DoQueryIEEEBlock_Bytes(":DISPlay:DATA? PNG")
Debug.Print "Screen image bytes: " + CStr(lngBlockSize)
' Save screen image to a file:
Dim strPath As String
strPath = "c:\scope\data\screen.png"
If Len(Dir(strPath)) Then
Kill strPath ' Remove file if it exists.
End If
Dim hFile As Long
hFile = FreeFile
Open strPath For Binary Access Write Lock Write As hFile
Dim lngI As Long
For lngI = 0 To lngBlockSize - 1
Put hFile, , byteArray(lngI) ' Write data.
Next lngI
Close hFile ' Close file.
MsgBox "Screen image written to " + strPath