R&S ZVB - Page 493

R&S
®
ZVA / R&S
®
ZVB / R&S
®
ZVT GUI Reference
Channel Menu
Operating Manual 1145.1084.12 – 30 478
The enhanced wave correction is automatically activated when one of the following measurement modes
is selected:
 True differential mode or defined coherence mode (with option R&S ZVA-K6). Enhanced wave
correction is a prerequisite for these modes and cannot be disabled.
 Scalar mixer measurement with source match or source and load match correction (see Define
Scalar Mixer Meas). The source match correction corresponds to an enhanced wave correction.
Activating the enhanced wave correction activates source match correction for the scalar mixer
mode and vice versa.
Remote control:
[SENSe<Ch>:]CORRection:EWAVe[:STATe]
Procedure, Extensions and Limitations
The enhanced wave correction for a set of analyzer ports (referred to as "port sets" in the following) is
based on a system error correction which provides the correct power ratios and phase relationships
between the waves. For a single port, a full one-port calibration is required. For n ports, a full n-port
calibration (TOSM, TRL, TNA ...) is required.
A power calibration is not mandatory but required for absolute power measurements. To obtain the
absolute power levels at all ports within the port set, either a source power calibration with reference
receiver calibration or a receiver calibration at a single port is sufficient. For best accuracy, perform a
source power calibration with active reference receiver calibration.
With active enhanced wave correction and power calibration, the analyzer shows the true waves and
ratios at the calibrated reference plane. For a one-port measurement at port n, the corrected ratio b
n
/a
n
is
equal to the system error-corrected reflection coefficient S
nn
. For n-port measurements, due to the
definition of the S-matrix, ratios and S-parameters are generally different.
Some frequency-converting measurement modes combine different port sets with different frequencies.
The port sets are defined as follows:
 No frequency conversion: The ports which are selected for the measurement (Meas check box on
in the Port Configuration dialog) form a port set for enhanced wave correction. After a full n-port
calibration, the n calibrated ports are selected.
 Scalar Mixer Measurement: Port 1 corresponds to port set 1, port 2 corresponds to port set 2, see
detailed example below.
 Defined Coherence Mode: All driving (coherent) ports form port set 1, the remaining ports (with
Meas on) form port set 2.
 Intermodulation Distortion Measurement: see Intermod Dist Meas Cal.
Example: In a scalar mixer measurement, port 1 drives at the RF output frequency f
RF
, port 2 measures at
the different IF frequency f
IF
. For a 300 kHz LO frequency and an RF frequency range of 1 GHz ... 2 GHz,
the Port Configuration dialog shows the following settings.