Agilent Technologies InfiniiVision 5000 Series Programmer's Manual page 750

12
Programming Examples
750
' Query for risetime.
myScope.WriteString ":MEASURE:RISETIME?"
varQueryResult = myScope.ReadNumber
MsgBox "Risetime:" + vbCrLf + _
FormatNumber(varQueryResult * 1000000, 4) + " us"
' Query for Peak to Peak voltage.
myScope.WriteString ":MEASURE:VPP?"
varQueryResult = myScope.ReadNumber
MsgBox "Peak to peak voltage:" + vbCrLf + _
FormatNumber(varQueryResult, 4) + " V"
' Query for Vmax.
myScope.WriteString ":MEASURE:VMAX?"
varQueryResult = myScope.ReadNumber
MsgBox "Maximum voltage:" + vbCrLf + _
FormatNumber(varQueryResult, 4) + " V"
' WAVEFORM_DATA - To obtain waveform data, you must specify the
' WAVEFORM parameters for the waveform data prior to sending the
' ":WAVEFORM:DATA?" query.
' the waveform data and the preamble can be read.
'
' WAVE_SOURCE - Selects the channel to be used as the source for
' the waveform commands.
myScope.WriteString ":WAVEFORM:SOURCE CHAN1"
' WAVE_POINTS - Specifies the number of points to be transferred
' using the ":WAVEFORM:DATA?" query.
myScope.WriteString ":WAVEFORM:POINTS 1000"
' WAVE_FORMAT - Sets the data transmission mode for the waveform
' data output. This command controls whether data is formatted in
' a word or byte format when sent from the oscilloscope.
Dim lngVSteps As Long
Dim intBytesPerData As Integer
' Data in range 0 to 65535.
myScope.WriteString ":WAVEFORM:FORMAT WORD"
lngVSteps = 65536
intBytesPerData = 2
' Data in range 0 to 255.
'myScope.WriteString ":WAVEFORM:FORMAT BYTE"
'lngVSteps = 256
'intBytesPerData = 1
' GET_PREAMBLE - The preamble block contains all of the current
' WAVEFORM settings.
' where <preamble_block> is:
' FORMAT : int16 - 0 = BYTE, 1 = WORD, 2 = ASCII.
' TYPE : int16 - 0 = NORMAL, 1 = PEAK DETECT, 2 = AVERAGE.
' POINTS : int32 - number of data points transferred.
' COUNT : int32 - 1 and is always 1.
' XINCREMENT : float64 - time difference between data points.
' XORIGIN : float64 - always the first data point in memory.
' XREFERENCE : int32 - specifies the data point associated with
' Read risetime.
' Read VPP.
' Read Vmax.
Once these parameters have been sent,
It is returned in the form <preamble_block><NL>
Agilent InfiniiVision 5000 Series Oscilloscopes Programmer's Guide