Read-only

Description

Note: This command replaces Get SnPData. This command is more explicit regarding the data to be returned, and works for VNAs with multiport test sets.

Reads SnP data for the measurement by specifying the VNA port numbers.  Learn more about SnP that is returned from the VNA.  

 VB Syntax

data = meas.GetSnPDataWithSpecifiedPorts ports

Variable

(Type) - Description

data

(Variant) array to store the data.

meas

A Measurement (object)

ports

(Variant Array) One-dimensional array containing the list of port numbers for which data is required.

Return Type

Variant - 3 dimensional array.

• First dimension size is number of parameters returned.

• Second dimension size is number of points in the channel

• Third dimension size is 2; format of the data is specified with SnPFormat Property.

For example:

Data(0,5,1) returns the imaginary part of the fifth data point of S11 (if the s2p request includes port #1)

Default

Not Applicable

Example

'This VBScript example can be pasted into a notepad file and run on the VNA as a macro. Learn how.

Dim pna

Dim meas

Dim param

Dim point

Dim snp

Dim ports

'List the port numbers for required data

ports = Array(3,4)

Set pna = CreateObject("AgilentPnA835x.application")

Set meas = pna.ActiveMeasurement

'limit amount of data to display

set chan=pna.ActiveChannel

chan.NumberOfPoints=2

snp = meas.GetSnPDataWithSpecifiedPorts (ports)

' returns a 3 dimensional array

' snp(param,point,data pair)

'-------------------------------------

' show me the data

For param = LBound(snp, 1) To UBound(snp, 1)

 MsgBox ("Parameter: " & (param + 1))

 For point = LBound(snp, 2) To UBound(snp, 2)

  MsgBox "Point:" & (point + 1) & " " & snp(param, point, 0) & "," & snp(param, point, 1)

 Next

Next

C++ Syntax

HRESULT GetSnpDataWithSpecifiedPorts(VARIANT portsToMeasure,VARIANT* response);

Interface

IMeasurement7