Lowrance electronic LRA-1000 - Manual (Page 18)

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If you over apply the Trigger Delay, the black circle will disappear. De-
crease the Trigger Delay level and it will reappear.
3. Press
EXIT
to return to the main page display.
Adjust Main Bang Suppression
Main Bang Suppression is only for 4kW units —
LRA 2000, LRA 4000 and
LRA 5000. This feature filters out electronic noise close to your vessel. It
gives you control of radar sensitivity in the area surrounding your ves-
sel, approximately 180 feet in all directions.
Before making any adjustments to Main Bang Suppression, take your
vessel out on open water with fairly calm seas, like an open bay.
Caution:
If you have any doubt about your understanding of the Main
Bang Suppression feature, you should have it set up by a quali-
fied radar technician.
1. From the Radar Setup menu, press →|↓ to
A
DJUST
M
AIN
B
ANG
S
UP-
PRESSION
and press
ENT
. That will launch the Main Bang Suppression
vertical scrollbar.
2. The small red ring we adjusted during Trigger Delay setup will still
be on the display.
3. Press ↑ slowly — Main Bang Suppression can be sensitive — to in-
crease the Main Bang Suppression level so the red ring becomes as thin
as possible.
4. Press ↓ to slowly decrease the level until you have returned the red
ring back to its thinnest point. Every radar is different, but typically, a
setting between 2 and 8 percent will be satisfactory.
NOTE:
In many cases, depending on the radar unit you have, over applying
Main Bang Suppression can make the ring disappear, start to make
it wider or the ring can get to a point where it is as small as it will
get. At this point, increasing the main bang level will not change
the red ring.
If the red ring does not does not decrease in size when increasing
the suppression level, reduce the level until you see a slight in-
crease in the size of the ring, then leave it at that setting.