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

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R&S
®
ZVA/ZVB/ZVT Trace Menu
1145.1084.12 4.59 E-6
Time domain transforms can be calculated in band pass or low pass mode. For the latter the analyzer
offers the impulse and step response as two alternative transformation types. A wide selection of
windows can be used to optimize the time domain response and suppress sidelobes due to the finite
sweep range. Moreover, it is possible to eliminate unwanted responses by means of a time gate and
transform the gated result back into the frequency domain.
For a detailed discussion of the time domain transformation including many examples refer to the
application note 1EZ44_OE which is posted on the R&S internet.
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Frequency Domain and Time Domain select frequency domain or time domain representation
of the active trace .
•
Time Domain Stimulus Axis opens a submenu to define the stimulus axis range for the time
domain representation.
•
Define Transform ... opens a dialog to define the transformation type and the frequency domain
window used to optimize the time domain response.
•
Time Gate switches the time gate defined with Define Time Gate... on or off.
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Define Time Gate ... opens a dialog to select the time gate and define its parameters.
Frequency Domain
Selects the frequency domain representation for the active trace. The softkey is enabled if option ZVAB-
K2, Time Domain, is available, and if a linear frequency sweep (Channel – Sweep – Sweep Type – Lin.
Frequency) is active.
In frequency domain representation the diagram shows the measured trace as a function of the stimulus
frequency applied to the DUT. The trace corresponds to the results obtained during the frequency
sweep, however, the effect of a time gate is taken into account as long as the
Time Gate function is
active. The x-axis corresponds to the sweep range (stimulus range) selected via Channel – Stimulus .