Tsys
Calculate system noise temperature from AOS data. This one is too complicated. Use qTsys, or even better, use Noise. It's also possible to calculate noise temperature using LinPlot.

Syntax:
Tsys

Example:
Tsys

Options:
/diode,
assume cold/hot from noise diode

Thot=T,
hot temperature for receiver tests. default 295K

Tcold=T,
cold temperature for receiver tests. default 80K

zero=x,
limit considered to be zero to avoid error: default 1.0E-6

infinity=x,
highest noise temperature allowed: default 1.0E5

Tmm=[lower,upper],
override plot window range for Tsys

/gain,
plot the gain as well. This is intended for noise measurements of the LNA using a noise diode.

HotWhich=n,
the spectrum to use as hot spectrum: default read file hotspec.aos

ColdWhich=n,
the spectrum to use as cold spectrum: default read file coldspec.aos

AddComs=S,
additional comments for the plot. The variable S is a string, or an array of strings.

PSfile='filename.ps',
filename for postscript output of Tsys

/showspectra,
plot the hot and cold spectra (default, no)

TsysAOS=T,
The Tsys data is returned in the variable T. This can then be used in as input to BackendOverplot.

/nowrite,
don't write out the tsys.aos file: default write it.