3- 31
Making Time Domain Measurements
Range
In this example, the range is 100 ns, or 30 meters electrical length. To prevent the time domain responses
from overlapping, the test device must be 30 meters or less in electrical length for a transmission
measurement (15 meters for a reflection measurement). The analyzer limits the stop time to prevent the
display of aliased responses.
To increase the time domain measurement range, first increase the number of points, but remember that as
the number of points increases, the sweep speed decreases. Decreasing the frequency span also increases
range, but reduces resolution.
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