JRC JMA-2343, Instruction Manual

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9.8.2 Adjusting the noise level
This operation adjusts the basic level of the echo that is displayed on the PPI screen.
This adjustment need not be changed in general as the equipment is adjusted ex
factory.
If the adjustment is changed inadvertently, it will not be possible to obtain optimum
images as a phenomenon causing reduction in sensitivity may be generated.
(a) Select "COMPARATOR PRESET" in the menu "INITIAL SETTING 1".
(b) Adjust the noise level pushing the "
▲
(up)" or "
▼
(down)" on the
ＲＡＮＧＥ ＲＡＮＧＥ ＲＡＮＧＥ ＲＡＮＧＥ
key.
(c) Push the
ＥＮＴＥＲ ＥＮＴＥＲ ＥＮＴＥＲ ＥＮＴＥＲ
key.
The noise level adjustment has been completed.
9.8.3 Adjusting the bearing
This operation adjusts the bearing on the PPI screen.
(a) Select "RM" in the line "TM/RM" - the menu "FUNCTION".
If the mode is already in RM, this operation is not required.
(b) Select "H-UP" in the line "HDG MODE" - the menu "FUNCTION".
If the mode is already in H-UP, this operation is not required.
(c) Determine the target.
Select an image of a target within 1NM to 2NM that can be seen with the naked eye and
that is not moving.
(d) Measure the bearing of the target from the ship's bow using the ship's compass.
For example, assume the target is stationary at a bearing of 25 degrees from the ship's bow.
(e) Select "BEARING" in the menu "INITIAL SETTING 1".
The EBL for bearing adjustment will be displayed.
This EBL is different from #1EBL or #2EBL.
Attention