Rohde & Schwarz 1323.0012.03, User Manual

Page: 350 / 1014

VNA GUI Reference
R&S
®
ZNL/ZNLE
350 User Manual 1178.5966.02 ─ 07
9.6.8.1 Controls on the Trace Statistics Tab
The "Evaluation Range..." button opens the "Evaluation Range" dialog (see Chap-
ter 9.6.8.2, "Evaluation Range Dialog" , on page 352).
Min/Max/Peak-Peak, Mean/Std Dev/RMS
The upper two softkeys in the "Trace Statistics" tab display or hide groups of statistical
results. The values are based on all response values of the trace in the selected evalu-
ation range ("Evaluation Range...").
Suppose that the trace in the evaluation range contains n stimulus values x
i
and n cor-
responding response values y
i
(measurement points). The statistical values are
obtained as follows:
●
"Min" and "Max" are the largest and the smallest of all response values y
i
.
●
"Pk-Pk" is the peak-to-peak value and is equal to the difference "Max"–"Min"
●
"Mean" is the arithmetic mean value of all response values:



n
i
i
y
n
Mean
1
1
●
"Std Dev" is the standard deviation of all response values:
 
 
 
n
i
n
i
i i
y
n
y
n
Dev Std
1
2
1
)
1
(
1
. .
●
"RMS" is the root mean square (effective value) of all response values:



n
i
i
y
n
RMS
1
2
| |
1
Note: To calculate the "Min", "Max", "Pk-Pk" and the "Std Dev" values, the analyzer
uses formatted response values y
i
(see trace formats). Consequently, the mean value
and the standard deviation of a trace depend on the selected trace format. In contrast,
the "RMS" calculation is based on linear, unformatted values. The physical unit for
Trace Softtool
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