Rohde & Schwarz 1145.1010.04/05/06, Руководство по эксплуатации

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Channel Menu R&S
®
ZVA/ZVB/ZVT
1145.1084.12 4.134 E-6
Sweep Type
The Sweep Type submenu defines the sweep variable (frequency/power/time) and the position of the
sweep points across the sweep range.
•
Lin. Frequency is the default sweep type. The stimulus frequency is swept in equidistant steps
over the continuous frequency range. In a Cartesian diagram, the x-axis is a linear frequency
axis.
•
Log. Frequency is analogous to Lin. Frequency, however, the frequency is swept in equidistant
steps on a logarithmic scale. In a Cartesian diagram, the x-axis is a logarithmic frequency axis.
•
Segmented Frequency is analogous to Lin. Frequency but uses a sweep range that can be
composed of several continuous frequency ranges or single frequency points defined via Define
Segments.
A valid segment list must be defined before activating Segment Frequency.
•
Power sweeps are performed at constant frequency but with variable generator power that is
swept in linear, equidistant steps over a continuous range. In a Cartesian diagram, the x-axis is
a dB-linear power axis.
•
Time sweeps are performed at constant frequency and stimulus power. The measurement is
repeated over a specified period of time at constant time intervals.
•
CW Mode is a variant of the Time sweep where the individual measurements are triggered
according to the current trigger settings.
Lin. Frequency
In a Lin. Frequency sweep the stimulus frequency is swept in equidistant steps over the continuous
frequency range. The frequency range (sweep range) is defined with the Stimulus settings. The step
width between two consecutive sweep points is constant and given by <Span>/(n - 1) where n is the
specified Number of Points (n > 1). The internal generator power can be set, if so desired, in the Power
Bandwidth Average submenu.
A Lin. Frequency sweep corresponds to the analysis of a signal over the frequency, as obtained e.g. by
means of a spectrum analyzer. This is the default sweep type. In a Cartesian diagram the measurement
result is displayed as a trace over a linear frequency scale (spectral representation). The following
example shows a
Lin. Frequency sweep with a stimulus range between 4.5 GHz and 6 GHz, the
forward transmission parameter S12 as measured quantity, and a dB Mag scaled y-axis.