NorthStar Navigation 10 kW - Manual (Page 39)

4. Press Rain Clutter, then press 0 twice to set the rain clutter value to zero.
5. Press Sea Clutter, then press 0 three times to set the sea clutter value to zero.
6. Press Gain, then press 1, 5, 0 to set the gain to 150. If you're using standard screen
colors, the display will show a green ring with a black center or solid green circle. If it
doesn't, try changing the gain value until you can see the green ring and black center
clearly. (If the gain is set too high, the display may be saturated.)
7. Press Page 3, Page 4, and Install... .
8. Press Trigger Delay, then press 000 on the keypad to set the trigger delay to zero.
9. Increase the trigger delay by pressing the Cursor Pad to the right (or enter a larger number
on the keypad). The black circle will shrink as you increase the trigger delay. Set the trigger
delay so that the black center just disappears, with only one or two dots remaining in the
center of the display.
4.4.1.5 Method 2
Use this method when the vessel is about 50 to 100 yards (45 to 90 m) from a straight-walled jetty or
similar feature that produces a straight line echo on the display.
1. Adjust the gain setting until a reasonably good image of the jetty echo is displayed.
2. Adjust the Trigger Delay to make the jetty echo appear as a straight line on the display,
as shown:
Set the heading calibration (heading sensor installed)
The heading calibration rotates the radar image on the screen to line it up with the displayed chart
and the compass. Accurate heading calibration is particularly important when the radar image is
overlain onto the chart.
IMPORTANT: Make sure the heading sensor is calibrated according to the manufacturer's
recommendations.
1. When performing a sea trial of the vessel, set a straight course for a solid object such as a
lighthouse, jetty or radar navigation marker that is at least 1 nautical mile distant as
referenced on the chart.
2. Press CHART to display the chart then press Overlay to show the radar echoes overlain
on the chart.
3. Set the chart rotation to North-Up by pressing Rotate several times until North-Up is
displayed.
4. Find a target at least 1 nautical mile distant that appears on both the chart and the radar
overlay. Do not choose a beach or a buoy as a target; instead, choose an obvious land
pattern or solid object with a fixed reference point such as a jetty, lighthouse, or pier.
5. Zoom in as necessary to place identifiable objects near the outer edge of the screen.
6. Press Control so that it displays Radar.
7. Press Page 2, Page 3, Page 4, and Install... .
8. Press Heading Calibrate then press the Cursor Pad left and right to rotate the
radar image so that the radar target matches its compass heading on the chart and lines up
on top of the position shown on the chart.
Northstar 10 kW Radar Installation Manual 39