R&S
®
ZVA / R&S
®
ZVB / R&S
®
ZVT GUI Reference
Channel Menu
Operating Manual 1145.1084.12 – 30 323
[SENSe<Ch>:]CORRection:POWer<port_no>:MIXer:IF:NFIGure:ACQuire
Mixer Cal...
Opens a submenu to perform the system error corrections which are required for the enhanced mixer
measurement. The calibration can be performed manually or using a calibration unit.
Manual... opens the Calibration wizard for two full one-port calibrations at the RF and IF ports.
Calibration Unit... opens the Calibration Unit dialog for automatic calibration using the connected
calibration unit. The pre-selected calibration type is compatible to the scalar mixer measurement.
Both calibration methods provide equivalent results. After the mixer cal is applied, the analyzer
automatically activates an enhanced wave correction at the RF and IF ports; see Enhanced Wave
Correction (Scalar Mixer Meas.). A Load Match Correction can be activated in addition, depending on the
correction type selected in the Define Scalar Mixer Measurement dialog.
The enhanced wave correction relies on accurate RF source and IF receiver power levels. A Mixer
Power Cal is required in addition to the Mixer Cal. After a completed power calibration and mixer
calibration, the trace line for the conversion loss S
21
shows the calibration state label Pcal Cal.
The mixer calibration improves the accuracy of the scalar mixer measurement but does not provide any
additional results. The phase or group delay of mixers can be analyzed in a vector mixer measurement.
Enhanced Wave Correction (Scalar Mixer Meas.)
The Mixer Cal automatically includes an enhanced wave correction at the RF and IF ports.
The enhanced wave correction for the scalar mixer measurement calibrates the a- and b-waves at the RF
and IF ports of the mixer under test. The RF and IF frequencies are different from each other. Two steps
are required to calibrate each of the ports:
A source or receiver power calibration determines the absolute amplitude of the a- or b-waves.
A full one-port system error correction calibrates the phase and relative power of the waves.
Together with the power calibration, this yields the absolute power of all waves.
The order of the calibration steps is arbitrary. A Scalar Mixer Measurement Power Calibration provides a
source power calibration for the RF port and a receiver power calibration for the IF port. The Scalar Mixer
Meas Calibration provides both full one-port calibrations.
The one-port calibrations for the two ports are completely independent; the calibration does not involve a
through-connection between the ports. Alternatively, it is possible to perform a single full two-port
calibration at the RF and IF ports as shown in section Enhanced Wave Correction Procedure. The
analyzer will perform segmented calibration sweeps and discard the calibration data of the Through
standard.
Note that Enhanced Wave Correction is not supported for Mixer Delay Measurements and Harmonics
Measurements.
Vector Mixer Meas (R&S ZVA and R&S ZVT)
The Vector Mixer Meas submenu is used to assess the parameters of an external mixer including phase,
e.g. the complex conversion loss or reflection coefficients. Compared to scalar mixer measurements,
vector mixer measurements require an extended test setup and calibration method. Vector mixer
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