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LOWER
LOWER LIMIT
LIMIT
To
change
the lower
limit,
first
make certain the
word "AUTO" Is off at
thetop
ofthescreen.
Thisindicatesthat
the automatic
mode is off.
(Note:
This
also
disables the automatic
sensitivity
function.)
If the
automatic mode
is
on,
press
the AUTO
key
once to disable It.
Next,
pressthe
lower limitdesired from
10 to 9999 feet and
press
the LOWER
LIMIT
key.
The
displaywill immediately
change
to the
new
depth range
and
displaythenewlowerlimitatthebottom
of the screen.
For
example,
to set the
range
to
80
feet,
press
8,O,LOWER
NOTE: The maximum
lower limit the X40 can
display
is
9999 feet.
However,
the actual
depth
that it can reach Is
dependent
on water and
bottom
conditions,
plus
the
quality
of the transducer
installation.
When the
X-40
changes ranges
while in the
automatic
mode,
the
lowerlimit selected will
always
bea
multiple
often. In
otherwordsthe lower
limit will be a number
that ends in zero such as
ten,
twenty, forty,
one
hundred,
etc.
I
UPPER
UPPER
LIMIT
LIMIT
Often ft's
desirable to
expand
or "ZOOM" a section of the
display
to
show more detail. You can do
this on the X-40
by using
the
Upper
Limit
feature.
-
To
change
the
display's upper
limit,
first make certain that
AUTO
is off. Then
simply press
the desired
depth (any
number
between 0 and
9989
feet). Next, press
the UPPER UMIT
key.
The
only
restriction on the
upperlimit
isthat it
mustnot be closertothe lowerllmttthan I
Ofeet. In other
words,
setting
the
lower limit to 81 feet
prevents
the
upper
limit
from
being
closer than 71 feet. It
requires
a ten foot or
larger segment. Remember,
you
cannot
change
the
upper
limit if the X-40 Is in
automatic.
Set
upper
and
lower limits in various
combinations to show
segments anywhere
between the surface and the
bottom. This
permits
a
scale
expansion
or "zoom" of a
portion
of the
display.
from 0
LIMIT.
MENU
#4- DIGITAL AVERAG-
ING
The
digital
sonar used in the X-
40 is a
highly
sensitive device that
gives
rapid updates
of the water's
depth.
Under most
conditions,
the bottom
contour
changes
so
quIck
that the dis-
play appears
to
"Jitter".
In
other
words,
the
display
will
change
so
quickly
that it
can be
difficult to determine the actual
bottom
depth.
To
minmize this condi-
tion,
the X.40
averages
the bottom read-
ings
and
displaysthe
result. WhentheX-
40 is first turned
on,
averaging
is en-
abled.
To disable
it,
press
2nd,COMMAND
until
menu
4
appears,
or
press
4,2nd, COMMAND.
Next,
press
the
up
or
down arrow in the ZONE
ALARM section of the
keyboard
to turn it
off oron. Wait six
seconds forthe
display
to clear or
press
the CLEAR
key
to res-
ume
operation.
MENU
#5- PULSE WIDTH
-
page
22
MENU
#6-SCC-page2O
MENU #7
-
ZOOM SIZE
(AUTOMATIC
BO1TOM
TRACK-
ING)
-
page
13
MENU
#8-
FEET/FATHOMS/METERS
-
page
21.
These
functions are
printed
in white on
keys
on the
keyboard.
For
example
press
2nd,
0 for the
pulse
width
menu.
However,
they
were
included in the Command
section since
they
are available
by
pressing
the COMMAND
key.
You can
also
press
the menu
number,
then
the 2nd
key,
then the COMMAND
key.
For
example, press
5, 2nd,
COMMAND
for the Pulse
Width menu. Since these functions have
been
explained previously, please
refer to the
page
numbers listed
above for Instructions.
12
25
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