Concepts and Features
R&S
®
ZNC
17
User Manual 1173.9557.02 ─ 13
The ranges of numerical values must be compatible with the instrument model. The con-
ditions for the stimulus range depend on the sweep type:
●
Lin. Frequency/Log. Frequency/Segmented Frequency
The supported frequency range is listed in
chapter 6.3.14.8, "[SENSe:]FRE-
The stop frequency must be greater than the start frequency; the span must be
≥
1
Hz. If a stop frequency smaller than the current start frequency is set, then the start
frequency is adjusted and vice versa. A sweep must contain at least two different
sweep points.
●
Power
Start and stop power are both entered in absolute units (dBm). Start and stop power
must be different; the stop power must be larger than the start power. If a stop power
smaller than the start power is set, then the start power is adjusted automatically and
vice versa.
The power corresponds to the actual source power at the test ports (channel base
power P
b
). After a port power calibration, this source power is available at the cali-
brated reference plane.
●
CW Mode
The stimulus keys define the fixed stimulus frequency (CW Frequency) of the mea-
surement. The other sweep parameters (e.g. the Number of Points) are set via
"CHANNEL > SWEEP > Sweep Params".
●
Time
The "Stop" key defines the total sweep time (Stop Time). The remaining stimulus keys
define the fixed stimulus frequency (CW Frequency) of the measurement. The other
sweep parameters (e.g. the Number of Points) are set via "CHANNEL > SWEEP >
Sweep Params".
The sweep time is entered in seconds and must be positive.
The selected sweep range applies to all source and receive ports of the analyzer.
3.1.5 Data Flow
The analyzer processes the raw measurement data in a sequence of stages in order to
obtain the displayed trace. The following diagram gives an overview.
The diagram consists of an upper and a lower part, corresponding to the data processing
stages for the entire channel and for the individual traces. All stages in the diagram are
configurable. Note that the channel data flow for S-parameters (and quantities derived
from S-parameters such as impedances, admittances, stability factors etc.) differs from
the channel data flow for wave quantities (and derived quantities such as ratios).
Basic Concepts