R&S ZVB - Page 568

R&S
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ZVA / R&S
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ZVB / R&S
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ZVT GUI Reference
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Operating Manual 1145.1084.12 – 30 553
WRyy calibration kit are automatically set active. The R&S ZCxxx converters conform to standard IEEE
1785. The designation of their waveguide sizes is WM-xxxx. The waveguide dimensions are identical to
the former WRyy sizes between the 75 – 110 GHz and the 220 – 330 bands. In order to allow for the use
of the ZV-WRyy kits for the calibration of a ZCxxx converter, these kits have additionally been pre-defined
in the NWA software for the WM-xxxx connector types.
For some high-frequency converter types (e.g. R&S ZVA-Z500) each calibration sweep of the system
error correction is performed twice. The first sweep is named Preparation Sweep; a tooltip below the
calibration sweep diagram indicates an ongoing preparation sweep.
Measurement
After power calibration and system error correction, the mm-wave measurement can be performed like
any other network analyzer measurement. The Port Configuration settings (together with the Stimulus
settings) determine the sweep range of the converted signals (i.e the input and output frequencies at the
DUT ports). All measured quantities (S-parameters, wave quantities, ratios etc.) and other trace settings
are available.
The following restrictions hold for measurements with converters without external attenuators:
 With Control Method in the Port <i> Power Control dialog set to None or Mechanical Attenuator,
the measurement is performed at fixed RF source and LO power. No power sweep is possible. To
reduce the actual output power of the converters (e.g. for measuring wave quantities or testing
compression effects), turn the adjusting knob on top of the converters clockwise. You will see an
effect on the output power within the last 2 mm of the adjustable range.
 Note the special analyzer settings listed in section Frequency Converter.
The following example shows the transmission and reflection coefficients of a bandpass filter in the
frequency range between 75 GHz and 110 GHz, i.e. the measurement range of the converter R&S ZVA-
Z110.