Furuno FAR-1416, Operator'S Manual

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1. OPERATIONAL OVERVIEW
1-23
3. Press and hold the left button .
The MOB mark disappears.
Note: You can also erase the MOB mark by selecting the mark with the cursor and
pressing DEL key.
1.18 How to Adjust the Gain
The gain control adjusts the sensitivity of the receiver.
The proper setting is such that the background noise is just visible on the screen. If
you set up for too little sensitivity, weak echoes may be missed. On the other hand
excessive sensitivity yields too much background noise; strong targets may be missed
because of the poor contrast between desired echoes and the background noise on
the display.
1.18.1 How to select auto/manual gain control
1. Press the CURSOR ON/OFF key when cursor is not shown on the screen.
2. Move the cursor onto the [GAIN] box at the top-right of the screen.
3. Press the left button to select [GAIN] (automatic adjustment) or [GAIN MAN]
(manual adjustment).
To adjust receiver sensitivity, adjust the gain control so background noise is just visible
on the screen.
1.18.2 How to adjust the gain manually
You can adjust the gain manually by following procedure.
1. Press the CURSOR ON/OFF key when cursor is not shown on the screen.
2. Move the cursor onto the range box at the top-left of the screen.
3. Rotate the
scrollwheel to select 48 NM, then press the left button .
4. Select the manual adjustment refer to paragraph 1.18.1.
5. Move the cursor onto the level bar.
6. Rotate the
scrollwheel upward to decrease the gain, or downward to increase the
gain. The setting range is [0] to [100]. Adjust the gain to around 80.
How to adjust the GAIN from the control unit (RCU-029)
Rotate the GAIN knob ( F3 ). Rotate anticlockwise to decrease the gain, or clockwise
to increase the gain.
Place cursor inside
window to adjust gain.
Level bar
GAIN
75
Select auto or
manual