SNA5000A Vector Network Analyzer User Manual 116
proportional to the starting frequency. Recalculate the start
frequency and step frequency as the harmonics of the starting
frequency. Calculate the starting frequency according to the
formula of low pass start frequency = stop frequency/points. The
calculated value must not be less than the minimum frequency of
the vector network analyzer. The number of points or stop
frequency may change.
4.9.2
Gating
The gating function of a vector network analyzer is the most useful feature in time domain
transform. When the time domain characteristics of the equipment need to be viewed, the
gating function can only choose the required time-domain response, eliminate unnecessary
time domain response, and then view the frequency domain characteristic curve of the required
response through Fourier transform. The gating function enables the DUT to be characterized
without connectors or adapters.
Click
Math→Time Gating→Gating Setup→Gating
to open the gating setting interface,
then we could set the start time, stop time, center time, span, gate type, and gate shape in this
interface.
Figure 4-12 Gating setting interface
Gating on:
Open or close the gating function.
Start time:
Set the start time of gating.
Stop time:
Set the stop time of the gate.
Center time:
Set the center time of the gatie.
Time span:
Set the time span of the gate.
Gate type:
Sets the type of filtering performed by the gating function.
⚫
Bandpass:
Keep the response in the gating span.
Summary of Contents for SNA5000A Series
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