GUI Reference
R&S
®
ZNC
222
User Manual 1173.9557.02 ─ 13
Tip:
In "Log Freq" representation, limit lines and ripple limit lines appear as exponential
curves; see
chapter 3.4.1.1, "Rules for Limit Line Definition"
Remote command:
LOGarithmic
Segmented
In a "Segmented" frequency sweep the sweep range can be composed of several con-
tinuous frequency sub-ranges or single frequency points. The sub-ranges are termed
sweep segments and defined in the "Define Segments" dialog. Sweep segments may
overlap. The segment list must contain at least 2 distinct frequency points before a seg-
mented frequency sweep can be started.
Instrument settings such as the internal generator power, the measurement (IF) band-
width, and the frequency band of the local oscillator can be set independently for the
individual segments.
Due to this flexibility, segmented frequency sweeps are suitable for any detailed analysis
of a DUT at specified frequencies. In a Cartesian diagram the measurement result is
displayed as a trace over a linear frequency scale ranging from the lowest to the highest
frequency point of all segments. The following example shows a segmented frequency
sweep with 2 segments in the stimulus ranges between 1 GHz and 6 GHz and between
4 GHz and 5 GHz, respectively. The forward transmission parameter S
21
is measured,
and a "dB Mag" scaled y-axis is used. In the frequency range between the sweep seg-
ments the trace is displayed as a straight line.
Tip:
You can change to point based x-axis to improve the display of a segmented fre-
quency sweep (see
Remote command:
SEGMent
Power
In a "Power" sweep the internal generator power is swept in linear, equidistant steps over
a continuous power range. The generator power range (sweep range) is defined via
"STIMULUS > START" and "STIMULUS > STOP". The fixed frequency can be defined
via "CHANNEL > SWEEP > Sweep Params > CW Frequency".
"Power" sweeps are particularly suitable for the analysis of non-linear effects (saturation,
compression) on active and passive DUTs (e.g. power amplifiers, mixers).
In a Cartesian diagram the measurement result is displayed as a trace over a dB-linear
power scale. The following example shows a "Power" sweep in the source power range
between
–
25 dBm and 0 dBm, performed at a CW frequency of 1 GHz.
Channel Settings