Nautel NX25, Operation And Maintenance Manual

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NX300 Operations and Maintenance Manual Operating the transmitter
Page 2-38 Issue 3.0 2012-11-01
Figure 2.24: Smith Chart
Smith chart.
See Figure 2.24 . The Smith Chart allows you to visualize the impedance of the
transmitter’s load as seen at the combiner, as a function of frequency. The impedance shown on the
Smith Chart is normalized to the combiner input impedance. The ideal load is therefore 1 +j0 ohms,
which implies a perfect 50-ohm load is being applied to the output of the transmitter.
Touch on the panel to display a cursor in the nearest area on the trace showing the normalized
impedance plot line. The cursor position (impedance and frequency) is noted in the upper, right-hand
corner of the panel. Touch in other areas of the tool menu panel to provide a coarse adjustment of
the cursor position.
Use the left and right buttons as fine adjustments.
Use the zoom in (+) and zoom out (-) buttons to size the chart between 100% and 1000%.
Zoom
In
Zoom
Out
Cursor
Left
Cursor
Right
Close
Minimize
(Maximize)