NF:Cold Source:Input Termination:VSWR Property

NF:Cold Source:Input Termination:VSWR Property

Short Name: NF Cold Source Input Term VSWR

Property of RFmxSpecAn

Specifies an array of voltage standing wave ratios (VSWR) as a function of frequency of the microwave termination used as the noise source in cold source method. The corresponding array of frequencies is specified by the NF Cold Source Input Term VSWR Freq property.

In most cases, the exact VSWR of the microwave termination may not be known. Hence, NI recommends that you set this property to an empty array, in which case the noise figure (NF) measurement assumes that the VSWR of the microwave termination is unity for all frequencies.

You do not need to use a selector string to configure or read this property for the default signal instance. Refer to the Selector Strings topic for information about the string syntax for named signals.

The default value is an empty array.

Remarks

The following table lists the characteristics of this property.

Datatype
Permissions	Read/Write
High-level VIs	N/A
Resettable	Yes