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Concepts and Features
R&S
®
ZNB/ZNBT
183
User Manual 1173.9163.02 ─ 53
The R&S
ZNB/ZNBT offers multiple possibilities to calibrate several channels in paral-
lel:
●
Calibrate multiple channels in one go, using the same calibration type on the same
ports for all channels
In this case, for each port to be calibrated the same calibration standards have to
be connected. After connecting one of these standards, a calibration sweep has to
be performed for each channel.
This simple mode of parallel calibration is supported from the analyzer GUI ("Cali-
brate all Channels" checkbox in all calibration wizards) and via remote control (see
[SENSe:]CORRection:COLLect:CHANnels:ALL
●
Calibrate a subset of the available channels, possibly using different ports and cali-
bration types, using
remote control
.
In this case, for each port to be calibrated a different set of calibration standards
might be required. For each of these standards only a subset of the available chan-
nels might have to be swept. See
[SENSe:]CORRection:COLLect:CHANnels:
This advanced mode of parallel calibration is available via
remote control only
.
5.6
Offset Parameters and De-/Embedding
The R&S
ZNB/ZNBT functionality described in this section complements the calibra-
tion, compensating for the effect of known transmission lines or matching networks
between the calibrated reference plane and the DUT.
5.6.1
Offset Parameters
Offset parameters compensate for the known length and loss of a (non-dispersive and
perfectly matched) transmission line between the calibrated reference plane and the
DUT.
The analyzer can also auto-determine length and loss parameters, assuming that the
actual values should minimize the group delay and loss across the sweep range.
5.6.1.1
Definition of Offset Parameters
The
delay
is the propagation time of a wave traveling through the transmission line.
The
electrical length
is equal to the delay times the speed of light in the vacuum. It is a
measure for the length of the transmission line between the standard and the actual
Offset Parameters and De-/Embedding