
AUTO
RANGE
WITH ZOOM
BOTTOM
TRACK
An
optional
Zoom feature
is Auto
Range
with
Zoom Bottom Track.
When the
Z-6100 is in the
automatic
mode,
it
picks
a
lower
limit
range
that will
keep
the bottom
signal
in the lower
¾ of
the screen. The
upper
limit is
normally
set
to zero.
However,
a 'window"
can be created to
zoom
or
expand
the
area near the
bottom and
track it as the
bottom rises or
falls.
For
example, suppose
the bottom is
85 feet
deep
and the lower limit is
100 feet To
display
a 30
foot window
around the
bottom,
first
press
the
ZOOM
key.
The number lI5QI
will be
displayed
in the
upper
middle of the
screen. This is the
window size.
The
upper
and lower
limits will be
changed
to
create the 50 foot
window
automatically. (See Figure
10).
To create
a 30 foot
window,
press
the
up
arrow
in the RANGE
section
on the
keyboard.
The number "30"
will be
displayed
for six seconds
in
the
upper
middle of
the screen. This
signifies
that
a 30 foot
window is in
effect,
To
change
to a
larger
or
smaller
window,
simply press
the
arrow
keys
in the RANGE
section on the
keyboard.
The
window size
will be
displayed
for six
seconds
and the
upper
and
lower limits
will be
changec
to
the new
window size.
,AUTO
SENSITIVITY ADVANCED
OPERATION
When the Z-6100 is
in the automatic
mode,
the
sensitivity
of the
receiver will be
adjusted
to
ten
steps
above the
minimum
required
to
pick
up
the
bottom
signal. (There
are 32
steps
of
sensitivity
available.)
The
sensitivity
level can be
changed
while the Z6100 is in the
automatic mode.
This
may
be
desirable if the level of
sensitivity
chosen
by
the
Z-6100 is not
enough
to
show fish or other small
detail,
or
if it is
too
high
for water conditions.
Once the
sensitivity
has been
changed,
the
Z-6100 will increase the
sensitivity enough
to
pick up
the
bottom
signal,
then add in the level
you programmed.
If
desired,
any
amount of
sensitivity up
to the
maximum
may
be
added.
To
adjust
the
sensitivity
while the Z-8100 is in the
automatic
mode,
simply
press
either the
right
arrow
key>
to
increase the
sensitivity
or the
left
arrow
key
<to decrease it. If the
sensitivity
is decreased to
minimum,
the Z-6100's audible
tone will "flutter'
The same is true if
you
try
to
go
above the
maximum level.
As
you press
the arrow
key,
the
sensitivity,
bar
wifl move
right
or
left,
according
to the amount of
sensitivity
chosen.
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Figure
10
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60
CHART
SPEED
When the Z-6100
is turned on for the first
time,
the chart
speed
scrolls
at
a
pre-determined
speed.
If a
higher speed
is
desired, press
and hold
the
right
arrow>
key
in the CHART
section of the
keyboard
until it runs at
the desired
speed.
To slow the
displhy, press
and hold the left
arrow
<
key.
Whenever
either of these
keys
are
pressed,
the
sensitivity
bar at the
top
of
the
display
will
change
to a dashed hue and
the letters "Cl-IT"
will
appear
in a window near
the
top
of the
display.
This bar
represents
the
chart
speed.
If
you
press
and hold
the
right
arrow>
key
for
example,
the
bar will
start
moving
to
the
right, signifying
that
the chart
speed
is
increasing. By holding
either the
right
or
left arrow
keys,
the
display
can
be
speeded
up
or slowed
down. When the
horizontal bar reaches the
tar
right
side
pf the
screen,
the chart
speed
is at its
maximum value. The
Z-6100 wifl
"flutter"
signifying
the
maximum chart
speed
has been
reached.
CHART
SPEED
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Figure
7
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Figure
11
Note: The
available
window sizes are:
10,20,
3050, 100,
200 and 300
feet
To turn Auto
Range
with
Zoom Bottom
Tracking off, simply
press
the
ZOOM
key
and the
upper
limit will
return to zero.
13
10
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