R&S ZNB Series User Manual page 733

®
R&S ZNB/ZNBT
expressed in units of dB/m. Due to the skin effect and various other factors, the attenu-
ation is frequency-dependent.
For predefined cables, the table is read-only.
Access:
Given the specified attenuation values the R&S ZNB/ZNBT calculates the attenuation
factor at the center of the channel's sweep range and corrects the impulse response
trace using this attenuation factor Attenuation (f
The frequency dependence can be defined in two alternative ways:
●
Single reference frequency
If the cable attenuation is specified at a single frequency f
calculates Attenuation (f
Attenuation (f
which accounts for the impact of the skin effect.
●
Frequency list
If the cable attenuation is specified at several frequency points, the R&S ZNB/
ZNBT calculates the Attenuation (f
(above) the specified frequency range, then Attenuation (f
lated from the two lowest (highest) frequency points.
It is recommended to specify the cable attenuation as accurately as possible. The cor-
rection due to the attenuation factor is proportional to the measured distance between
the fault and the reference plane: The larger the distance, the larger the correction.
Add / Delete
Creates/deletes a user-defined cable type.
Remote command:
CALCulate<Chn>:TRANsform:DTFault:DEFine
CALCulate<Chn>:TRANsform:DTFault:DELete
MMEMory:LOAD:CABLe
MMEMory:STORe:CABLe
Import Cable Type
Opens the "Import Cable Type" variant of the
cable type file (*.rsc) for import.
User Manual 1173.9163.02 ─ 62
Available Cable Types... dialog
center
) / Attenuation (f
1
> "Attenuation" column > ...
).
center
) using
) = sqrt (f / f
center 1 center
) by linear interpolation. If f
center
Open File
GUI reference
Applic softtool
, the R&S ZNB/ZNBT
1
),
is below
center
) is linearly extrapo-
center
dialog that lets you select a
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