Write-only

About Measurement Parameters

Description

Changes the parameter of the measurement.

 VB Syntax

meas.ChangeParameter(param,src)

Variable

(Type) - Description

meas

A Measurement (object)

param

(string) - New parameter. Case insensitive.

For S-parameters and Applications parameters:

Single-digit port numbers can be separated by "_" (underscore). For example: "S21" or "S2_1"

Double-digit port numbers MUST be separated by underscore. For example: "S10_1"

For Ratioed receiver measurements:

Any two receivers in your VNA separated by "/". For example: "A/R1"

See the block diagram showing the receivers in YOUR VNA.

For Unratioed (absolute power) measurements:

Any receiver in the VNA. For example: "A"

See the block diagram showing the receivers in YOUR VNA

Ratioed and Unratioed measurements can also use logical receiver notation to refer to receivers. This notation makes it easy to refer to receivers with an external test set connected to the VNA. You do not need to know which physical receiver is used for each test port. Learn more.

For ADC measurements

Any ADC receiver in the VNA.

For example: "AI1" indicates the Analog Input1.

Learn more about ADC receiver measurements.

For Balanced S-parameter measurements:

"topology:Sabxy"

topology -  Choose from:

1. • sbal - single-ended to balanced

   • ssb - single-ended / single-ended to balanced

   • bbal - balanced to balanced

Sabxy -

Where

a - device output (receive) mode

b - device input (source) mode

(choose from the following for both a and b:)

1. 1. • d - differential

      • c - common

      • s - single ended

x - device output (receive) logical port number

y - device input (source) logical port number

For example:"sbal:sdd42"

See an example program

For Imbalance and Common Mode Rejection measurements:

"topology:parameter" Choose from:

src

(long integer)

• Ignored if param is an S-Parameter

• Source port if param is a ratioed or unratioed receiver measurement (including ADC measurements).

Note: If the port is defined by a string name, such as an external source, a balanced port, or one of the Source outputs on the 2-port VNA-x model with multiple sources, then you must use chan.getPortNumber to translate the string into a port number. To learn more see Remotely Specifying a Source Port.

Return Type

Not Applicable

Default

Not Applicable

Examples

meas.ChangeParameter "S11",2 '2 is ignored

meas.ChangeParameter "VC21",1 '1 is ignored

meas.ChangeParameter "A/R1",2 '2 is the source port

meas.ChangeParameter "a1/b1",1 '1 is the source port

meas.ChangeParameter "R1",2 '2 is the source port

'to change to a parameter with a string name
dim app
set app = CreateObject("Agilentpna835x.application")
dim capabilities
set capabilities = app.Capabilities
dim portnum
portnum = Capabilities.GetPortNumber("Src2 Out1")
app.activemeasurement.ChangeParameter "A",portnum
 

C++ Syntax

HRESULT ChangeParameter(BSTR parameter, long lPort)

Interface

IMeasurement