Basic Operation
R&S
®
ZVA-Z90E / -Z110E
21
Getting Started 1307.7197.62 ─ 08
Figure 3-1: Frequency Converter dialog
3.4
Entering Power Coefficients
For accurate control of the converter output power, the R&S ZVA analyzer must know
the (non-linear) current-power characteristic of the converters. The characteristic is suf-
ficiently described by a third-order polynomial. A label with the four polynomial coeffi-
cients c
0
, c
1
, c
2
, and c
3
is affixed to each converter.
The power coefficients must be adjusted whenever a new converter is connected to an
analyzer port. To enter the coefficients, proceed as follows:
1. Activate the frequency converter mode following the first steps in
"Activating the Frequency Converter Mode"
2. In the "Frequency Converter" dialog, press "Coefficients".
3. In the "Power Coefficients" dialog opened, clear "Use default coefficients" and
enter your coefficients into the appropriate table row.
The numbers of the table rows denote the analyzer ports for the converters.
4. Repeat the last step for all frequency converters in the test setup.
Entering Power Coefficients
