Furuno CSH-53 - Manual (Page 14)

1-6
Main
Item
Item
Setting
Range
Description
Normal
Setting
Main Sub
SIGNAL
SIGNAL
PROCESS
NL 0–10 Rejects unwanted echoes. 3
AGC 0–10
Automatically reduces receiver
gain against strong echoes such
as seabed. Adjust so fish echo is
displayed near seabed.
0
2AGC* 0–4
Suppresses seabed echoes. If
AGC alone cannot suppress
seabed echoes, use 2AGC.
0
SIGNAL
PROCESS
CURVE 1–4
Selects echo level versus presen-
tation color curve. The higher
the setting, the easier it is to see
weak echoes on the screen.
2
IR 0–3
Rejects random noise and inter-
ference by other echo sounders
or sonars.
0
AFGLOW 0–4
Adjusts echo afterglow, which is
useful for watching echo move-
ment. The higher the setting the
longer the afterglow remains.
0
ES
ES1
(Net
Recorder)
RANGE
(DN RNG) 16
Pos.
Sets depth range of echo
sounder picture. Sets range of
net recorder downward
sounding.
160 m
GAIN 0–10 Adjusts receive sensitivity. 5
SHIFT
(UP RNG) 0–
1000 m
Sets display start depth of echo
sounder picture. Sets range of
net recorder upward sounding.
0 m
ES1
(Net
Recorder)
NL 0–10
Rejects blue dots (caused by
dirty water) on entire screen.
0
COLOR 0–9
Eliminates echoes displayed in
colors specified.
0
IR
ON,
OFF
Eliminates interference by other
sonars or echo sounders.
OFF
DELETE MK
DELETE
MARK
+ or -
key to
erase.
Each pressing erases oldest mark
among event mark 1, event mark
2, fish mark, own ship mark.
DELETE
MARK
TRACK
Each pressing deletes 1/5 of
overall length.
*2AGC and HOR functions cannot be used together. If one is used the other is
automatically set to “0”.
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