R&S
®
ZVA / R&S
®
ZVB / R&S
®
ZVT GUI Reference
Channel Menu
Operating Manual 1145.1084.12 – 30 374
[SENSe<Ch>:]CORRection:COLLect:NFIGure:SAVE
[SENSe<Ch>:]CORRection:COLLect:NFIGure:END
Correction Off
Activates or deactivates the Noise Figure Calibration in the active channel. Correction Off is available only
after a calibration has been performed and applied to the active channel.
With deactivated correction, the analyzer calculates an approximate noise figure, neglecting the influence
of internal noise, attenuators etc. This can introduce large deviations between the uncorrected and the
corrected traces.
[SENSe<Ch>:]CORRection:NFIGure[:STATe]
Virtual Transform
The Virtual Transform submenu defines virtual networks to be added to/removed from the measurement
circuit for a DUT with single ended or balanced ports. The submenu is available for analyzer models with
arbitrary numbers of ports.
Embedding a DUT into a matching network
To be integrated in application circuits, high-impedance components like Surface Acoustic Wave (SAW)
filters are often combined with a matching network. To obtain the characteristics of a component with an
added matching network, both must be integrated in the measurement circuit of the network analyzer. The
figure below shows a DUT with a single-ended and a balanced port that is combined with a real matching
circuit and a physical unbalance-balance transformer (balun) in order to be evaluated in a 2-port
measurement.
The idea of virtual embedding is to simulate the matching network and avoid using physical circuitry so
that the analyzer ports can be directly connected to the input and output ports of the DUT. The matching
circuit is taken into account numerically. The analyzer measures the DUT alone but provides the
characteristics of the DUT, including the desired matching circuit. This method provides a number of
advantages:
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