Read-only

Description

Note: this command is replaced by Get SnpDataWithSpecifiedPorts Method.

Reads SnP data from the selected measurement. Learn more about SnP that is returned from the VNA.

 VB Syntax

data = meas.GetSnPData type

Variable

(Type) - Description

data

Variant array to store the data.

meas

A Measurement (object)

type

(string) - Type of SnP data to return. If unspecified, <n> is set to 2.  Choose from:

"S1P"  returns 1-Port data for the active measurement if the active measurement is a reflection parameter such as S11 or S22. The behavior is UNDEFINED if the active measurement is a transmission parameter such as an S21.

"S2P"  returns data for the current 2-port measurement (4 S-parameters).

"S3P"  returns data for the current 3 port measurement (9 S-parameters).  Valid only on instruments with 3 ports or more.

"S4P"  returns data for the current 4 port measurement (16 S-parameters).  Valid only on instruments with 4 ports or more.

SnP data can be output using several data formatting options.  See SnPFormat Property

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 (real,imaginary)

For example:

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

Default

Not Applicable

Examples

snp = meas.GetSnPData("s1p")

C++ Syntax

HRESULT GetSnPData( BSTR snptype, VARIANT * response)

Interface

IMeasurement3