Adjustment; Selecting Radar Source; Heading Alignment; Setting The Antenna Height - Furuno DRS4A Installation Manual

3. ADJUSTMENT

This section provides the information necessary for setting and adjusting the radar sensor, which
is carried out from the menu.
3.1

Selecting Radar Source

1. Open the Radar Installation menu.
2. Choose "Radar Source" to show the menu options window.
3. Choose "DRS4A" or DRS6A" as applicable.
4. Close the Radar Source options window.
3.2

Heading Alignment

You have mounted the radar sensor facing straight ahead in the direction of the bow. Therefore,
a small but conspicuous target dead ahead visually should appear on the heading line (zero de-
grees).
In practice, you will probably observe some small error on the display because of the difficulty in
achieving accurate initial positioning of the radar sensor. The following adjustment wil compen-
sate for this error.
1. Choose "Heading Alignment" from the menu.
2. Select a stationary target echo at a range between 0.125 and 0.25 nm, preferably near the
heading line.
3. Place the cursor on the indication "EBL 1" or "EBL 2" at the bottom left corner, and then press
the left-button key at the center of the cursorpad to show the EBL.
4. Rotate the RotoKey to bisect the target echo with the EBL.
5. Press the left-button key.
6. As a final test, move the boat towards a small buoy and confirm that the buoy shows up dead
ahead on the radar when it is visually dead ahead.
3.3

Setting the Antenna Height

1. Select "ANTENNA HEIGHT" from the menu.
2. Select the height of the radar sensor above the water surface.
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