GUI Reference
R&S
®
ZNC
166
User Manual 1173.9557.02 ─ 13
Statistical Functions
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 ("Eval 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
●
SDev 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 values and the SDev, the analyzer uses for-
matted 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 units for unformatted
Trace Settings