3-18 PN: 10580-00321 Rev. M S331L UG
3-4 Line Sweep Measurements Cable and Antenna Measurements
DMax (Maximum Usable Distance)
DMax is the maximum horizontal distance that can be analyzed. The
Stop Distance cannot exceed DMax. If the cable is longer than DMax,
DMax needs to be improved by increasing the number of data points or
lowering the frequency span (ΔF). Note that the data points can be set
to 130, 259, 517, 1033, or 2065 (Sweep > Data Points).
DMax = (Datapoints – 1) x Distance Resolution
The following describes the main steps to follow when making DTF
Return Loss or DTF VSWR measurements.
1. Press the Measurement main menu key and select DTF Return
Loss or DTF VSWR.
2. Press the Freq/Dist main menu key.
Figure 3-13. Effects of Windowing on a Sample Trace
Rectangular Nominal
Low
Minimum
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