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576 Agilent InfiniiVision 5000 Series Oscilloscopes Programmer's Reference
9 Programming Examples
' CStr(lngXReference) + vbCrLf
'strOutput = strOutput + "Y increment = " + _
' FormatNumber(sngYIncrement * 1000) + _
' " mV" + vbCrLf
'strOutput = strOutput + "Y origin ="+_
' FormatNumber(sngYOrigin) + " V" + vbCrLf
'strOutput = strOutput + "Y reference = " + _
' CStr(lngYReference) + vbCrLf
strOutput = strOutput + "Volts/Div ="+_
FormatNumber(lngVSteps * sngYIncrement / 8) + _
" V" + vbCrLf
strOutput = strOutput + "Offset = " + _
FormatNumber(sngYOrigin)+"V"+vbCrLf
strOutput = strOutput + "Sec/Div = " + _
FormatNumber(lngPoints * dblXIncrement / 10 * _
1000000)+"us"+vbCrLf
strOutput = strOutput + "Delay = " + _
FormatNumber(((lngPoints / 2) * _
dblXIncrement + dblXOrigin) * 1000000) + " us" + vbCrLf
' QUERY_WAVE_DATA - Outputs waveform data that is stored in a buffer.
' Query the oscilloscope for the waveform data.
err = viVPrintf(vi, ":WAV:DATA?" + vbLf, 0)
' READ_WAVE_DATA - The wave data consists of two parts: the header,
' and the actual waveform data followed by a new line (NL) character.
' The query data has the following format:
'
' <header><waveform_data><NL>
'
' Where:
'
' <header> = #800001000 (This is an example header)
'
' The "#8" may be stripped off of the header and the remaining
' numbers are the size, in bytes, of the waveform data block. The
' size can vary depending on the number of points acquired for the
' waveform. You can then read that number of bytes from the
' oscilloscope and the terminating NL character.
'
'Dim lngI As Long
Dim lngDataValue As Long
paramsArray(1) = VarPtr(byteArray(0))
retCount = ByteArraySize
' Unsigned integer bytes.
err = viVScanf(vi, "%#b" + vbLf, paramsArray(0))
' retCount is now actual number of bytes returned by query.
For lngI = 0 To retCount - 1 Step (retCount / 20) ' 20 points.
If intBytesPerData=2Then
lngDataValue = CLng(byteArray(lngI)) * 256 + _
CLng(byteArray(lngI + 1)) ' 16-bit value.
Else
lngDataValue = CLng(byteArray(lngI)) ' 8-bit value.
End If
strOutput = strOutput + "Data point " + _