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Fault Location Software
A captured RL or SWR trace can be transformed to a Distance to Fault
display. This is useful for determining the location of faults, connec-
tions, and other discontinuities within the cable.
To transform a plot, select Fault Find from the Tools menu (or click
the toolbar button). A drop down menu will appear that asks you to
supply start and stop distances, along with dielectric constant or propa-
gatiion velocity and insertion loss values. The table on the inside of the
manual back cover provides these values for some of the more popular
cables. The values are given at a nominal frequency of 1000 MHz. If
values are needed at a different frequency, or if you need the exact val-
ues for more accurate measurement, please contact the cable manufac-
turer. Cables may be added to the list be editing the
cables.lst
file and following the existing format. The distance may be entered in
feet or meters. Propagation velocity or dielectric constant may be used.
The units may be changed by selecting Default Plot Settings under the
Settings menu and changing “Distance Units” or “Cable Units.”
After supplying the needed information and clicking OK, a new plot
will open showing cable match vs. distance.
Smith Chart Software
After obtaining a frequency SWR or RL plot on the computer display,
click the Smith Chart icon. Read the Help file to see how this feature
functions (under Smith Chart and Data Readout).
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Chapter 3 Screen Capture Program