Bearing Adjustment; Range Adjustment - JRC JMA-1030 Series Instruction Manual

7.3 BEARING ADJUSTMENT

Adjust the bearing so that bearing of the target measured with the ship's compass matches that of the target
echo on the radar display.
Before adjustment
Measure the bearing of an adequate target (for example, a ship at anchor, a breakwater or a buoy) relative
to own ship's heading.
Procedure
(1) Radar is set to TX mode.
(2) Adjust GAIN, RAIN and SEA to find the known target on the screen.
(3) Adjust the bearing at the end point to display the target described in "Before adjustment" at the same
direction as measured.

7.4 RANGE ADJUSTMENT

Adjust the range so that the range of the target on the radar video is indicated correctly. This set up is make
the target RANGE coincident with the VRM readout data. Read out the target range by the VRM function.
The target has the same height with the radar scanner should be better.
Range unit is using the NM in marine radar usually. (1NM=1852m).
Before adjustment
Select a target which range is already known.
Procedure
(1) Radar is set to TX mode.
(2) Adjust GAIN, RAIN and SEA to find the known target on the screen.
(3) Adjust the range on the radar to match to the range of the target described in "Before adjustment".
Chapter 7 INITIAL SETTINGS
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