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To turn the
digital display
off,
or back on
again, press
2nd-5.
N OTE
Even if
the
digital
numbers are not
being displayed
on the
screen,
the
digital
sonar will still continue to function. If the
digital
loses the
bottom
signal,
the chart
display
will
stop
until the
digital
finds
the bottom. If the
digital
numbers are
being displayed
on the
screen,
the chart
display
will
stop,
but
the
digital
will flash the last valid bottom
depth
until it
regains
the bottom
signal.
If the chart is in the
freeze
mode,
the
digital display
will
continue to show
the bottom
depth
as it
changes.
It does not freeze when the chart
does.
This
gives
an accurate means of
determining
the
precise
bottom
depth
at
all
times. In
fact,
the X-3 can be turned into a
digital
sonar
by pressing
2nd-0-5. This will
clear the screen of all
echoes, including
the bottom
signal,
and
increase the size of the numbers for
easier
viewing.
To
display
the bottom and other echoes
again, press
the
STOP/RESUME
key
in the chart section
of the
keyboard.
ALARMS
The X-3 has two
alarms,
a chart
alarm and a
depth
alarm. The chart
alarm
requires
both an
upper
limit and a lower limit
setting.
The alarm
then "sounds off" whenever
an echo
(such
as a
fish)
is
detected inside
the
boundaries set
by
the
upper
and lower limits.
The
depth
alarm also allows an
upper
and lower
limit
but it sounds
whenever the bottom echo is detected
outside the boundaries set
by
the
alarm's
upper
and lower limits. Both
chart and
depth
alarms can be
set,
then
switched back and forth.
However,
they
cannot be used simultane-
ously
and
will
be treated
separately
in
this section.
AUTO SENSITIVITY
Whenever the X-3 is in the
auto-sensitivity
mode,
it
will
adjust
the sensi-
tivity
of the unit to three
steps
above the minimum
required
to
pick
up
the
bottom
signal. (There
are 32
steps
of
sensitivity available.)
The
sensitivity may
be
adjusted
while the X-3 is in
the
auto-sensitivity
mode. This
may
be desirable if the level of
sensitivity
that the X-3
picked
is not
enough
to show fish or other detail. Once the
sensitivity
has been
changed,
the X-3 will increase the
sensitivity enough
to
pick up
the bot-
tom
signal,
then add the level that
you programmed
in.
For
example,
if it
took the X-3 five
steps
of
sensitivity
to find and lock onto
the
bottom,
it will add three more
steps
for a total of
eight
If
desired,
any
amount
of
sensitivity up
to 24
(for
a total of
32) may
be added.
Or,
three
steps
of
sensitivity
could be
subtracted,
however
only
the bottom
signal
would
be
displayed
at this low
sensitMty setting.
There
are two
ways
of
adjusting
the
sensitivity
while the X-3 is in the
auto-sensitivity
mode.
The first is to
press
either
the
right
arrow
key>
to increase the
sensitivity
or
press
the left arrow
key
<to decrease it If the
value
goes
below the
minimum
required
to
keep
the bottom
signal,
the X-3 will
"chirp'
The
same is true if
you try
to
go
above 32
steps.
As
you press
the arrow
key,
the
sensitivity
bar will move to
the left or
right, according
to the amount of
sensitivity
chosen.
The second method allows
you
to enter the amount of
steps using
the
number
keys
on the
keyboard.
For
example,
to
adjust
the
sensitivity
so
that it will
always
be ten
steps
above the minimum
required
to lock onto
the
bottom, press
the 1 -0-AUTO
keys.
The
sensitivity
will then
increase
to ten
steps
above the minimum
required,
instead of three.
Remember,
the total number of
steps
is 32.
OTHER
TIPS
If an incorrect
entry
is
made,
wait six seconds for it to
disappear,
then
enter the
desired number.
Or, press
2nd-O within six seconds of an
entry
and it will erase the last
keystroke.
Press 2nd-FAST or SLOW to
display
the chart
speed
bar without
chang-
ing
the chart
speed.
When
changing
the
upper
or lower
limits, remember the minimum dis-
tance between the two is ten feet. If a distance smaller than ten feet is
pressed,
the unit will move the
range
to a ten foot
separation.
For
exam-
ple,
if the
upper
limit was 0 and 9-LOWER LIMIT was
entered,
the X-3
would
disregard
the 9 and set the
lower
limit to ten feet
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