Upload and Download a Segment List

Option Explicit

Dim app

Set app = CreateObject("AgilentPNA835x.Application")

' Preset the VNA

app.Preset

Dim scpi

Set scpi = app.ScpiStringParser

' In case of a measurement receiver VNA like N5264B

' which has no source ports, "SOURce:CATalog?" will

' return an empty list (just a pair of quotation marks)

Dim srcPortNames

srcPortNames = Split( scpi.Execute("SOURce:CATalog?"), ",")

Dim numberOfSrcPorts

If Left( srcPortNames(0), 2 ) = Chr(34) & Chr(34) Then

   numberOfSrcPorts = 0

Else

   numberOfSrcPorts = UBound(srcPortNames) + 1

End If

' Building up a string consisting of the sweep segment data

' we want to set up.  This example will create two segments.

Dim segData

' Set state of first segment to be ON (1 = ON, 0 = OFF),

' 101 points, start freq of 10 MHz, stop freq of 1 GHz

segData = "1,101,10E6,1E9"

' If you want to include one or more of: IFbandwidth, Dwell Time

' or Port Power, remove the comments from these next two lines

'TurnOnOptions 1  'Call the subroutine

'segData = AddOptionalSettings(segData, numberOfSrcPorts)

' Set state of second segment to be ON, 201 points,

' start freq of 1 GHz, stop freq of 3 GHz

segData = segData & ",1,201,1E9,3E9"

' Uncomment this line below only if you uncommented the

' AddOptionalSettings line above for the first segment.

'segData = AddOptionalSettings(segData, numberOfSrcPorts)

Const numSegs = 2

' Upload our segment list to the channel

scpi.Execute "SENSe1:SEGMent:LIST SSTOP," & numSegs & "," & segData

' Set segment sweep type on Channel 1

scpi.Execute "SENSe1:SWEep:TYPE SEGment"

' Having the VNA display the segment sweep table for the channel

scpi.Execute "DISPlay:WINDow1:TABLe SEGMent"

Sub TurnOnOptions(ByVal chan)

   scpi.Execute "SENSe"&chan&":SEGMent:BWIDth:CONTrol ON"

   scpi.Execute "SENSe"&chan&":SEGMent:SWEep:TIME:CONTrol ON"

   scpi.Execute "SENSe"&chan&":SEGMent:POWer:CONTrol ON"

   ' Turning off coupling allows power to vary per each port

   scpi.Execute "SOURce"&chan&":POWer:COUPle OFF"

End Sub

Function AddOptionalSettings(ByVal inStr, ByVal numSrcPorts)

   ' Specifying 1 kHz IF bandwidth and Dwell Time of 0

   inStr = inStr & ",1E3,0"

   ' -10 dBm power for each of the source ports

   Dim i

   For i = 0 To numSrcPorts - 1

      inStr = inStr & ",-10"

   Next

   AddOptionalSettings = inStr

End Function

Option Explicit

Dim app

Set app = CreateObject("AgilentPNA835x.Application")

Dim scpi

Set scpi = app.ScpiStringParser

' Set the display-active channel's sweep type to segment sweep

' (if the VNA's currently active measurement window doesn't

'  contain any traces, this querying for active channel will

'  result in a SCPI error which scpi.Parse will trap and throw)

Dim chan

chan = CLng( scpi.Parse("SYSTem:ACTive:CHANnel?") )

scpi.Execute "SENSe"&chan&":SWEep:TYPE SEGment"

' Having the VNA display the segment sweep table for the channel

scpi.Execute "DISPlay:WINDow1:TABLe SEGMent"

' Get the total number of segments

Dim numSegs

numSegs = CLng( scpi.Execute("SENSe"&chan&":SEGMent:COUNt?") )

' Read the segment listing

Dim segDataStr

segDataStr = scpi.Execute("SENSe"&chan&":SEGMent:LIST?")

Dim segData

segData = Split(segDataStr, ",")

' Get upper bound of the array of data values

' (lower bound of array resulting from VB 'Split' function is 0)

Dim segArrayUB

segArrayUB = UBound(segData)

Dim numDataElementsPerSeg

numDataElementsPerSeg = (segArrayUB + 1) / numSegs

WScript.Echo "Number of segments = " & numSegs

WScript.Echo "Number of data values per segment = " & numDataElementsPerSeg

Dim segInfStr

segInfStr = "Segment 1: state = " & CBool(segData(0))

segInfStr = segInfStr & ", num points = " & CLng(segData(1))

segInfStr = segInfStr & ", start freq = " & CDbl(segData(2))

segInfStr = segInfStr & ", stop freq = " & CDbl(segData(3))

segInfStr = segInfStr & ", IFBW = " & CDbl(segData(4))

segInfStr = segInfStr & ", dwell time = " & CDbl(segData(5))

' In case of a measurement receiver VNA like N5264B

' which has no source ports, "SOURce:CATalog?" will

' return an empty list

Dim srcPortNames

srcPortNames = Split( scpi.Execute("SOURce"&chan&":CATalog?"), ",")

Dim srcPortNamesUB

srcPortNamesUB = UBound(srcPortNames)

' First source port name will be preceded by a quotation mark

' and the last name will be followed by one of those, so stripping

' those off now.

srcPortNames(0) = Right( srcPortNames(0), Len(srcPortNames(0)) - 1 )

srcPortNames(srcPortNamesUB) = Left( srcPortNames(srcPortNamesUB), InStrRev(srcPortNames(srcPortNamesUB), Chr(34)) - 1 )

Dim firstPortIndex

firstPortIndex = 6

Dim lastPortIndex

lastPortIndex = numDataElementsPerSeg - 1

Dim j

For j = firstPortIndex To lastPortIndex

   segInfStr = segInfStr & ", " & srcPortNames(j - firstPortIndex) & " power = " & CDbl(segData(j))

Next

WScript.Echo segInfStr