R&S
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ZVT GUI Reference
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Operating Manual 1145.1084.12 – 30 372
measurement, it is also part of the calibration test setup. The dot in the figure below denotes the position
of the DUT output in the measurement test setup.
The noise figure of the NWA receiver (including the connecting cable and a possible pre-amplifier) limits
the accuracy of the noise figure measurement as a whole. A pre-amplifier with a higher gain can reduce
the receiver noise figure. An R&S ZVAB-K30 Noise Figure Error Estimation Tool is available for download
at the Rohde & Schwarz internet site.
2. Source noise calibration of the analyzer's source port. The DUT is replaced by a through connection; its
attenuation should be as small as possible. If a pre-amplifier is used for the measurement, it is also part of
the calibration test setup. The two dots in the figure below denote the position of the DUT input and output
in the measurement test setup.
3. Attenuator calibration, if the measurement is performed with an external attenuator. The external
attenuator and a possible pre-amplifier are part of the calibration test setup. The DUT is replaced by a
through connection. The two dots in the figure below denote the position of the DUT input and output in
the measurement test setup.
The noise figure calibration procedure does not include the S-parameter calibration. An S-parameter
calibration (if desired) requires a series of additional calibration sweeps, according to the list of measured
standards in the calibration wizard. See also S-Parameter Calibration.
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