46 Chapter 3
Making Fault Location Measurements
Basic Measurement Procedures
NOTE The maximum length of the DUT that can be measured in the transmission
measurement is
. On the other hand, in the reflection measurement, because the signal goes and
returns, it is 1/2 of
.
The velocity factor varies depending on the material through which the signal
propagates. For polyethylene, it is 0.66; for PTFE, 0.7.
The change of the setting and the change of the response
The following table shows the effect of the change of the measurement conditions
on the response resolution and the measurement range.
Table 3-2 Effect of setting changes
Change of setting Response resolution Measurement range Sidelobe
Widen the sweep range Becomes smaller Becomes narrower Does not change
Sets the window type to maximum Becomes larger Does not change Becomes lower
Increase the number points Does not change Becomes wider Does not change
To Next Page
Loading...
