Rohde & Schwarz R&S UPP, Руководство пользователя

Страница: 116 / 938

Getting Started
R&S
®
UPP
100 User Manual 1411.1055.32 ─ 10
h) The default settings for the x
‑
axis are also mostly correct for this example:
By selecting a frequency sweep in the Generator Function panel, the x
‑
axis is
automatically defined as the frequency axis with the unit Hz.
If "Auto" is set in the "Scaling" field, the start and stop frequency of the sweep
defined in the "Generator
Function" panel is automatically used as the start and
end value for the x
‑
axis.
The "Lin" setting in the "Spacing" field is unsuitable for this example. Since a
sweep with logarithmic step size has been selected for this measurement, the
x-axis should also be subdivided logarithmically.
7. Step: Using a relative unit in the graphical window
The settings so far made allow the frequency response of the DUT to be displayed
graphically but not in a way that conforms to standards.
In the case of frequency response measurement, the relevant standards stipulate
that the deviations of the output voltage must be plotted over frequency, whereby
the output voltage of the DUT at the reference frequency 1 kHz (for analog mea-
surements) is used as the reference level.
The following settings in the "Sweep Graph 1 Config" panels are used to adapt the
graph for this measurement example:
Introduction to Instrument Operation Using Examples