Specifies the format for wave measurement.

Syntax

Namespace: NationalInstruments.RFmx.VnaMX

public enum RFmxVnaMXWavesFormat

Members

NameValueDescription
Magnitude0

The magnitude of the wave is reported. Specify the magnitude unit by configuring Wave Magnitude Units method.

Phase1

The phase of the wave is reported in degrees. Specify the phase type by configuring Wave Phase Trace Type method.

Complex2

The complex wave value is reported in Real-Imaginary format.

Swr3

The standing wave ratio computed from wave is reported. It is a unitless quantity.

SmithImpedance4

The impedance value computed from wave is reported in ohms.

SmithAdmittance5

The admittance value computed from wave is reported in siemens.

Polar6

The complex wave is reported in magnitude-phase format, where the magnitude is always in linear scale and the wrapped phase is represented in degrees.

GroupDelay7

The group delay of wave is reported in seconds. Group delay represents the time it takes for the signal to pass through a device under test. Group delay vs. frequency is derived from phase vs. frequency response. At a given frequency point, group delay is computed by selecting two nearby frequency points and taking the ratio of the phase difference to the frequency separation between them. The frequency separation between the two selected points is called the group delay aperture. The aperture can be controlled by first configuring WavesGroupDelayApertureMode method and once the mode is selected, you can set the aperture by configuring WavesGroupDelayAperturePoints or WavesGroupDelayAperturePercentage or WavesGroupDelayApertureFrequencySpan. For example, if the number of aperture points is equal to 3, then group delay at a nth frequency point is computed by selecting the (n-1)th frequency point and (n+1)th frequency point.