Rohde & Schwarz R&S ZNA Series - Page 457

GUI reference
R&S
®
ZNA
457User Manual 1178.6462.02 ─ 29
●
"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
ii
y
n
y
n
DevStd
1
2
1
)
1
(
1
..
●
"RMS" is the root mean square (effective value) of all response values:


n
i
y
n
RMS
2
||
1
i 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
unformatted wave quantities is 1 Volt. The RMS value has zero phase. The selected
trace format is applied to the unformatted RMS value, which means that the RMS
result of a trace does depend on the trace format.
Remote command:
CALCulate<Chn>:STATistics:MMPTpeak[:STATe]
CALCulate<Chn>:STATistics:MSTDdev[:STATe]
CALCulate<Chn>:STATistics:RMS[:STATe]
CALCulate<Chn>:STATistics:RESult?
CALCulate<Chn>:STATistics[:STATe]
CALCulate<Chn>:STATistics[:STATe]:AREA
Format
This setting determines how Min/Max/Peak-Peak, Mean/Std Dev/RMS for complex-val-
ued traces (Smith, Polar) are calculated:
●
"ZVAB": the results are based on unformatted wave quantities (voltages)
●
"R + jX": the results are based on the impedance values R and X
●
"G + jB": the results are based on the admittance values G and B
In the two latter cases, the "RMS" value is not displayed.
Remote command:
CALCulate<Chn>:STATistics:FORMat
Phase/El Length
Displays or hides the phase delay ("Phs Dly") and the electrical length ("El Len") of the
trace in the selected evaluation range ("Evaluation Range..."). The parameters are only
available for trace formats that contain phase information, i.e. for the formats "Phase",
"Unwr Phase", and the polar diagram formats "Polar", "Smith", "Inv Smith" (see Chap-
ter 5.3, "Format softtool", on page 419). Moreover, the sweep type must be a fre-
quency sweep, and the evaluation range must contain at least 3 measurement points.
Traces softtool