R&S ZVL
GUI Reference
Trace Menu
Operating Manual 1303.6580.32-06
186
The pull-down list in the
Cable Type
dialog contains an ideal air line (with a relative permittivity of 1, a
corresponding velocity factor of 1, and zero attenuation) and a wide range of standard cable types. Click
Available Cable Types
to open a second dialog where you can view the parameters of the predefined
cable types and add new types.
In the
Available Cable Types
dialog, added cables must be defined with their relative permittivity
]
r
and the
attenuation at a particular frequency or in a frequency range. The velocity factor 1/sqrt(
]
r
) is a measure for
the velocity of light in a dielectric with permittivity
]
r
relative to the velocity of light in the vacuum; see
Length offset parameters: Definition
. This parameter is needed to convert the propagation times in the
cable into distances. Permittivity and velocity factor are coupled parameters.
Cable description files, *.rsc
The R&S ZVL provides a wide range of pre-installed cable types. The properties of each cable are stored
in an ASCII file with the default file extension *RSC, the cable type forming the file name, e.g.:
Pre-installed cable description files are stored in the
C:\R_S\Instr\resources\Nwa\CableTypes
directory. A new, user-defined cable type is stored under
C:\R_S\Instr\user\Nwa\CableTypes
.
