NorthStar 6000i Installation Manual page 33

A range of 1 or 2nm is usually appropriate. A harbor area is often too crowded -- you may
need to move to an area with less crowded echoes.
25. Press Rough Tune.
26. With the Rough Tune value set at 87 (or a number that you have
determined to be a better starting point), press Auto Tune and wait two to
three minutes for the tuning process to finish.
The navigator will create a graph of received signal strength plotted against a number of
tuning settings near the selected starting point. The Auto Tune key indicates " Acquiring "
during this time. The system automatically locates the peak of the plotted curve.
The system may repeat this procedure up to five times if necessary.
27. When the Auto Tune key indicates " Done ," look at the graph to the left of the Rough Tune
key. If the graph shows a peak, with data sloping downwards on either side, the tuning is
finished. If the highest point of the graph is at either edge of the graph, tuning was not
successful. You could try manual tuning, or press Auto Tune again to repeat the procedure,
but be aware that this condition might indicate a problem with the installation.
Radar Installation Manual, Rev. E1
Peak not found Proper tuning
SECTION FOUR: Setting up the radar (older navigator software)
Auto-Graph
Peak not found
Page 29