GUI Reference
R&S
®
ZNB/ZNBT
503
User Manual 1173.9163.02 ─ 38
where Δf is the width of the evaluation range and ΔΦ is the corresponding phase
change. See also note on transmission and reflection parameters below.
●
"El Len" is the electrical length, which is the product of the phase delay times the
speed of light in the vacuum.
If no dispersion occurs the phase delay is equal to the group delay. For more informa-
tion refer to
Chapter 4.3.8, "Delay, Aperture, Electrical Length"
Note:
To account for the propagation in both directions, the delay and the electrical
length of a reflection parameter is only half the delay and the electrical length of a
transmission parameter. The formula for PD above is for transmission parameters. See
the section on "Length and delay measurement" in
Chapter 4.6.1.3, "Auto Length"
Tip:
The phase evaluation can cause misleading results if the evaluation range con-
tains a 360 deg phase jump. The trace format "Unwr Phase" avoids this behavior.
Remote command:
CALCulate<Chn>:STATistics[:STATe]
CALCulate<Chn>:STATistics:RESult?
CALCulate<Chn>:STATistics:EPDelay[:STATe]
Flatness/Gain/Slope
Displays or hides trace parameters that the analyzer calculates for the selected evalua-
tion range ("Eval. Range...").
Suppose that A and B denote the trace points at the beginning and at the end of the
evaluation range, respectively.
●
"Gain" is the larger of the two stimulus values of points A and B.
●
"Slope" is the difference of the stimulus values of point B minus point A.
●
"Flatness" is a measure of the deviation of the trace in the evaluation range from
linearity. The analyzer calculates the difference trace between the active trace and
the straight line between points A and B. The flatness is the difference between the
largest and the smallest response value of this difference trace.
Remote command:
CALCulate<Chn>:STATistics[:STATe]
CALCulate<Chn>:STATistics:RESult?
CALCulate<Chn>:STATistics:SFLatness[:STATe]
Compr. Point / Compr. Val.
Displays or hides all results related to the x-dB compression point of the trace, where x
is the selected compression value. To obtain valid compression point results, a power
sweep must be active, and the trace format must be "dB Mag" .
The x-dB compression point of an S-parameter or ratio is the stimulus signal level
where the magnitude of the measured quantity has dropped by x dB compared to its
value at small stimulus signal levels (small-signal value). As an approximation for the
small-signal value, the analyzer uses the value at the start level of the evaluation range
("Eval. Range...").
Trace Config Softtool
