Keysight P9241, Scpi Programmer'S Manual

Page: 1008 / 1344

1008 Keysight P9241/42/43A Oscilloscopes SCPI Programmer's Guide
30
:WAVeform Commands
' <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
varQueryResult = myScope.ReadIEEEBlock(BinaryType_UI1)
' Unsigned integer bytes.
For lngI = 0 To UBound(varQueryResult) _
Step (UBound(varQueryResult) / 20) ' 20 points.
If intBytesPerData = 2 Then
lngDataValue = varQueryResult(lngI) * 256 _
+ varQueryResult(lngI + 1) ' 16-bit value.
Else
lngDataValue = varQueryResult(lngI) ' 8-bit value.
End If
strOutput = str "Data point " + _
CStr(lngI / intBytesPerData) + ", " + _
FormatNumber((lngDataValue - lngYReference) _
* sngYInc sngYOrigin) + " V, " + _
FormatNumber(((lngI / intBytesPerData - lngXReference) _
* sngXInc dblXOrigin) * 1000000) + " us" + vbCrLf
Next lngI
MsgBox "Waveform data:" + strOutput
See complete example programs at: Chapter 38 , “Programming Examples,”
starting on page 1205