Filter
Top Products
Discrimination
desired, (0 through 10).
Then
press
the DISC
key.
There
should be an
immediate
change
in the noise
displayed
on the screen.
Turn
Discrimination off
by pressing
0,DISC
or
CLEAR,DISC.
To view the Discrimination
setting
without
changing it, press
the
[2'1 I
Sec
I
SURFACE
CLARITY CONTROL
The
markings
--or
noise—at the
top
of the
display
can at
times extend
many
feet below the surface.
This can
interf ere with fish
signals
orothertargets.
These
markings
are Surface Clutter
and
are caused
by
wave
action,
boat
wakes,
bait
fish,
temperature
Inversions,
and
other reasons.
SCC has ten leveis of
adjustment.
Turning
the X-40 on automati-
caily
sets SCC to level 1. To
change
to a different ievel,
simply
enter a
numberfrom 0 to
10,
then
press
2nd,
SOC or
simply press
2nd,
SCC. The
SCC menu
appears
with the level of SCC
currently
in
use.
Use the arrow
keys
in the
keyboard's
zone alarm section to increase or decrease
the SOC
levei. Pressthe
CLEAR
keyto
erasethe menu orwait severai
seconds after
20
1e'L1.W
.t&'
SHALWW
Al
I
SET
t I
ZONE ALARM
T
DISPLAY
__________________
To set the Zone
Alarm,
press
the
____________
SHALLOW
SET
key
in the ZONE
ALARM
section
of the
keyboard.
The letters
"ZN'
display
in the iower ieft corner of the
screen.
A vertical bar also
displays
on
the left side of the screenfor
six seconds.
This is the Zone Alarm's "window."
Any
echo that
appears
on
the
right
side of the
screen between the
top
and
bottom of
this barwill soundtheaiarm.
Adjust
both
the shallow and
deep
ends of
this bar to
make a smaller or
larger
alarm
"win-
dow."
To
adjust
the shallow
(top)
alarm,
press
the SHALLOW
SET
key.
The letters "ZN'
display
on the screen.
A
vertical
bar also
displays
on the far left
side of the screen. This is the zone
alarm's
"window".
Any
echothat
appears
between
the
top
and bottom of
this barwill sound
thealarm. To
adjustthetop
of the bar
press
the
up
arrow
keyto
movethetop
of the
alarmwindowup,
orthe
downarrow
keyto
move
the
top
of
the bar
deeper.
The
longer you
hold the arrow
key,
thefaster the
end of the zone
alarm bar will travel.
Release the
key
and in six seconds
the zone
alarm barwill
disappear.
However,
the zone alarm is still activated
as
you
can see
by
the letters "ZA" in the lower
portion
of the screen.
The
bottom of the zone alarm bar is
adjusted
in the same manner.
Just
press
the
DEEP SET
key
first,
then the arrow
keys
to set
the bottom of
b the bar to the
desired
depth.
If
you
wish to view the zone
alarm bar
continuously,
press 2nd,
DISPLAY. To turn it
off,
press
2nd,
DISPLAY
again.
This won't
affect the
zone alarm
settings.
It doesn't turn
the alarm
off,
just
the alarm bar.
When the zone alarm is
triggered by
an
echo,
the alarm
will
sound
and
the words ZONE ALM will
appear
on
the
display.
If the
range
is
changed,
the zone
alarm
settings may
need to be
changed
also,
since
they
don't track the
range settings.
17
DISC
key.
________________
ii)
sr:.Ns 1.' t/lT' -!:,._
—
L
TO CHANGE
PRESS
TUFt
I
ECL I
HI
r.
r
ZONE
ALII
;•
)'[
8
H
Use Surface
Clarity
Control
(SCC)
to reduce or eliminate surface
clutter. SOC varies the
gain
of the
re-
ceiver between each transmit
pulse,
while the
receiver is
"listening"
for the
return echoes. The
gain
is the lowest for
echoes near
the surface. It
gradually
increases as the
depth
increases. The
maximum
depth
that SOC will affect is
one-half of the selected
depth range.
For
example,
with maximum
SCC,
on a 0 to
60 foot
range,
SCC
would have an effect
from the surface to 30 feet.
-4
THERE FWE
10 LE"EL3
OF 'ECC
0 IURh.E'
OFF 9CC
TO CHANGE
4 3CC PRESS
0-10 ZND
FOR NO
C HHt4CE
PRESS
CLEAR
F
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