GUI Reference
R&S
®
ZNC
172
User Manual 1173.9557.02 ─ 13
To avoid errors, observe the following recommendations.
●
Start with a small aperture and increase it only as long as you are certain that the
trace is still correctly reproduced.
●
As a general rule, the smoothing aperture should be small compared to the width of
the observed structures (e.g. the resonance peaks of a filter). If necessary, restrict
the sweep range or switch smoothing off to analyze narrow structures.
Remote command:
Hold
Selects the Max Hold (peak hold) or Min Hold function for the active trace, or disables
both functions (Hold Off). With enabled Max Hold or Min Hold function, the displayed
trace shows the maximum or minimum values that the analyzer acquired since the start
of the measurement. The max hold and min hold trace is real, it is based on the magnitude
of the trace values (the phase values are discarded).
The max hold or min hold process can be restarted any time using "Restart". It is also
restarted automatically when the channel or trace settings are changed so that the pre-
vious measurement results are no longer compatible.
Note:
A memory trace is unformatted by definition. Therefore, "Data --> Mem" stores the
last measured trace instead of the real Max Hold or Min Hold trace.
Remote command:
Shift Trace > Stimulus
Shifts the active trace in horizontal direction, leaving the positions of all markers
unchanged. The unit of the offset value depends on the sweep type.
Note:
"Shift Stimulus Value" can be used in Cartesian as well as in polar diagrams. The visible
effect depends on the diagram type:
●
In Cartesian diagrams, the trace is shifted relative to the markers and the x-axis.
●
In polar diagrams, the trace is not affected, however, markers change their position.
Remote command:
Shift Trace > Mag / Phase / Real / Imag
Modifies all points of the active trace by means of an added and/or a multiplied complex
constant.
The units of the constants are adjusted to the format of the active trace. Setting all values
to zero ("Shift Reset") restores the original trace.
The trace points are modified according to the following formula:
Imag
Real
10
180
/
Phase
dB
20
/
Magnitude
j
e
a
M
M
j
old
new
The formula and the different constants are adjusted to the different display formats of a
trace:
●
The "Mag(nitude)" factor shifts a dB Mag trace in vertical direction, leaving the phase
of a complex parameter unchanged.
Trace Settings
