Concepts and Features
R&S
®
ZNC
52
User Manual 1173.9557.02 ─ 13
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AVG Real Imag
collects all valid results at each sweep point during the "Meas.
Time" set in the "More Ratios" or "More Wave Quantities" dialog and calculates the
complex arithmetic mean value of these results. This yields the complex average of
the wave quantities or ratios. Averaging tends to remove statistical fluctuations (e.g.
noise contributions) from the measured signal.
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AVG Mag Phase
collects all valid results at each sweep point during the "Meas.
Time" set in the "More Ratios" or "More Wave Quantities" dialog and calculates the
root mean square (RMS) of the linear magnitude of these results. This yields the
magnitude of the measurement point. Note that the phase is not evaluated in this
process so that complex conversions (e. g. the calculation of real and imaginary val-
ues) do not really make sense.
Combining different detectors
The detector setting in the "More Ratios" menu affects the ratio of a numerator and a
denominator wave quantity. This does not place any restrictions on the measurement
functionality of the analyzer, because ratios can also be formed by measuring the numer-
ator and denominator individually and using the trace functions. A possible application is
the comparison of different detector settings for a particular trace.
Error Messages
The analyzer generates a warning if the selected measurement time for the "AVG..."
detectors is too long. At the same time, bit no. 15 in the
...INTegrity:HARDware
status register is set. Reduce the measurement time and/or reduce the IF bandwidth until
the warning disappears. A warning also appears if the measurement time for the
"AVG..." detectors is too short. Increase the measurement time and/or increase the IF
bandwidth until the warning disappears.
3.3.5 Unbalance-Balance Conversion
Unbalance-balance conversion is the simulation of one or more unbalance-balance
transformers (baluns) integrated in the measurement circuit in order to convert the DUT
ports from an unbalanced state into a balanced state and virtually separate the differential
and common mode signals. The analyzer measures the unbalanced state but converts
the results and calculates mixed mode parameters, e.g. mixed mode S-parameters. No
physical transformer is needed.
To perform balanced measurements, a pair of physical analyzer ports is combined to
form a logical port. The balanced port of the DUT is directly connected to the analyzer
ports. For a two-port analyzer, a single balanced port can be defined.
Measurement Results