R&S
®
ZVA / R&S
®
ZVB / R&S
®
ZVT GUI Reference
System Menu
Operating Manual 1145.1084.12 – 30 544
RF In Power (and Electronic Attenuator) with Data Set is used for converters with or without
electronic attenuator, for which leveling data are available (either Factory data, provided via USB
or acquired using the R&S Converter Leveling Tool).
The analyzer uses a set of power calibration data to ensure accurate power at the reference
plane. The calibration data set is acquired by the Leveling Tool that can automatically acquire
calibration data over a wide range of powers and frequencies. This control method is
recommended for best accuracy, in particular if large sets of calibration data are required.
If selected, the Read User Data Set button becomes enabled (see below for details).
Furthermore, there are the following controls available in the dialog:
The Power Coefficients button is enabled, if a converter with electronic attenuator is connected to
port <i> and either Electronic Attenuator only or RF In Power (and Electronic Attenuator) with
Linear Approximation is selected as Control Method. It opens the Power Coefficients dialog.
The Lin Approx Coefficients button is enabled if RF In Power (and Electronic Attenuator) with
Linear Approximation is selected as Control Method. It opens the Linear Approximation dialog.
The Data Set section is enabled if RF In Power (and Electronic Attenuator) with Data Set is
selected as Control Method.
Factory data are only supported by R&S ZCxxx models. Selecting the User radio button enables
the Read User Data Set button. The latter opens a standard folder browser dialog, allowing to pick
a calibration data folder (Calibration Subdirectory) for the current channel, in accordance with the
definitions in the Leveling Tool.
The Leveling Tool relates the collected calibration data to the used test ports (suffix "_P<j>" in
generated filenames); in order to apply them correctly, you have to use the same port assignment during
measurement. If the selected data set does not contain leveling data for port <i> the following message is
displayed: "Data set <...> does not contain correction data for port <i>".
If a Data Set selected before is no longer available, a warning "Selected linearization data set could not be
found. Power control by instrument software is no longer possible" is displayed and the option None or
Mechanical Attenuator is selected.
SOURce<Ch>:POWer<Pt>:CONVerter:TRANsfer:DESCription
SOURce<Ch>:POWer<Pt>:CONVerter:TRANsfer:DSET
SOURce<Ch>:POWer<Pt>:CONVerter:TRANsfer:PATH
Power Coefficients (for Converters with Electronic Attenuators)
The Power Coefficients dialog can be opened from the Power Coefficients button in the Port<i> Power
Control dialog. It is used to enter the power coefficients for a converter with electronic attenuator,
connected to port <i>.
For accurate control of the converter output power, the NWA must know the converter's (non-linear)
current-power characteristics, which are sufficiently described by a third-order polynomial.
To Next Page
Loading...
