Filter
Top Products
display
a fish
arch,
it has to
be able to receive the fish's echo from the
time it enters the cone
until.
it leaves. If the
sensitivity
is not
high
enough,
the unit
displays
the fish
only
when it is in the center of the
cone.
3. Use the Zoom feature. It is much easier to
display
fish arches when
zoomed in on a small
range
of water than a
large
one. For
example,
you
will have much better luck
seeing
fish arches with a 30 to 60 foot
range
than a 0 to
60
foot
range.
This
enlarges
the
targets, allowing
the
display
to show much more detail.
4. The boat must be
moving
at a slow
trolling speed
to see fish arches.
If
the boat is
motionless,
fish
stay
in the
cone,
showing
on the
display
as
straight
horizontal lines.
ELECTRICAL NOISE
A
major
cause of sonar
problems
is electrical noise. This
usually
appears
on the sonar's
display
as random
patterns
of dots or lines. In
severe
cases,
it can
completely
cover the screen with black
dots,
or
cause the unit
operate erratically,
or not at all.
To
eliminate
or
minimize the
effects of electrical
noise,
first
try
to
determine the cause. With the boat at rest in the
water,
the first
thing
you
should do is turn all electrical
equipment
on the boat off. Make
certain the
engine
is
off,
also. Turn
your
Z-9500
on,
then turn off ASP
(Advanced Signal Processing).
There should be a
steady
bottom
signal
on the
display.
Now tum on each
piece
of electrical
equipment
on the boat and view the effect on the sonar's
display.
For
example,
turn on the
bilge pump
and view the sonar
display
for noise. If no noise
is
present,
turn the
pump
off,
then turn on the VHF radio and transmit.
Keep doing
this until all electrical
equipment
has been turned
on,
their
effect on the sonar
display
noted,
then turned off.
If
you
find noise interference from an electrical
instrument,
trolling
motor,
pump,
or
radio,
try
to isolate the
problem.
You can
usually
re-
route the sonar unit's
power
cable and transducer cable
away
from the
wiring
that is
causing
the interference. VHF radio antenna cables
radiate noise when
transmitting,
so be certain to
keep
the sonar's wires
away
from it. You
may
need to route the sonar unit's
power
cable
directly
to the
battery
to isolate it from other
wiring
on the boat.
If no noise
displays
on the
sonar unit from electrical
equipment,
then
make certain
everything except
the sonar unit is turned
off,
then start
the
engine.
Increase the RPM with the
gearshift
in
neutral.
If noise
ROUTES
The
Z-9500
gives you
the
ability
to
go
to several
waypoints
in a row.
This feature is called Routes. A
route
consists
of two or more
way-
points.
When
you
run a
route,
the Z-9500
gives you navigation
informa-
tion to the first
waypoint
in the route. As
you
reach the first
waypoint,
the arrival alarm
sounds,
then the next
waypoint
is
automatically
se-
lected
by
the unit.
Navigation
information is
displayed
for this
waypoint
until the arrival alarm sounds and the
process repeats
for the next
waypoint.
This
happens
until
you've
travelled to all the
waypoints
in the
route.
There are two
steps necessary
to create a route. First
you
must name
the route. Then
pick
the
waypoints
to use in the route. To follow a
route, you
simply
determine the
starting waypoint,
then decide whether
to follow the route
forward
or backward. After
these
steps
are com-
pleted,
the Z-9500 will start
navigating
on the route.
Creating
a Route
To
create a
route,
first
press
the MENU
key
.Now
press
the
key adja-
cent to the "More" label. Now
press
the
key
next to the "Route Plan-
ning"
label. The screen shown below
appears.
Next,
press
the
key
adjacent
to the
"Create
New
Route" label.
The
screen shown at the
top
of the next
page appears.
Select Function
'Create New Itoute
Erase Route
r.
Follow Route
'
Cance 1 Route
a
I
50
87
PDF compression, OCR, web-optimization with CVISION's PdfCompressor