Suppressing Noise Interference; Selecting Pulselength; Off Centering The Display - Furuno 821 Operator's Manual

corner on the display when the interference
rejection circuit is turned on.
2.18 Suppressing Noise
Interference
Noise interference appears on the screen as
many bright dots. These dots can be sup-
pressed by turning on the noise rejector. Note
however that there are some forms of noise
interference which this radar cannot sup-
press.
Procedure
1) Press the [MENU] key.
2) Select P/L & Int/Noise Rej & ES and
press the [ENT] key.
3) Select Noise Reject to ON.
4) Press the [ENT] key followed by the
[MENU] key.

2.19 Selecting Pulselength

Pulselength is the transmission time of a
single radar pulse. The longer the
pulselength the greater the detection range
capability, however range accuracy and
range resolution are reduced.
Pulselength can be selected to short or long
on the 1.5 and 3 nautical mile ranges.
1) Press the [MENU] key.
2) Select P/L & Int/Noise Rej & ES and
press the [ENT] key.
3) Select Pulselength to SHORT or LONG
6) Press [ENT] and [MENU] key.

2.20 Off Centering the Display

Your vessel's position can be shifted any-
where within 75% of the effective display
area. The primary advantage of the off cen-
tered display is that for any range setting,
the view ahead of your vessel can be ex-
tended without changing the range or size
of targets.
Procedure
1) Locate the cursor where you want to the
screen center to be.
2) Press the [OFF CENTER] key.
OFF CENTER appears at the top left corner
on the display when the display is off cen-
tered.
Note: The off centered display is automatically
canceled when the [DISP MODE] key is
pressed.
Cursor
(1) Place cursor
where desired.
Figure 2-16 Off centering the display
Cursor
(2) Press [OFF CENTER]
key; cursor location
becomes screen center.
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