19
LIGHT
LIGHT
A light is
provided for
operation of the X-3 at
night.
When the unit is first
turned on, the lights will flash for 6 seconds. Press the 2nd-9
keys and
the lights
will stay on. To turn the
lights off, press
the 2nd-9 keys. The
lights
will also go off
when the X-3 is turned off.
DISCRIMINATION
Noise is
quite often the biggest complaint
fishermen have about their
sonar units. Noise is
any
undesired signal
and it can be caused either
by
an electrical or acoustic source, or a combination of
the two. In both
cases,
the noise can produce unwanted marks on the display.
DISCRIMINATION
OFF(O)
The Discrimination feature on the X-3
processes
all incoming echoes
from the receiver, determines which ones are noise and eliminates
them,
then displays only the legitimate
echoes. Discrimination
has two levels—
1, and 2. 0 is "off",
2 is the
highest setting. When the X-3 is turned on, the
Discrimination level is automatically
set to 1. If noise is present
on
the
display, press the level
of Discrimination
desired,
(0, I, and 2) then the
DISC key. There should be
an immediate
change in the amount of noise
displayed.
ADVANCED OPERATION
14)
HIGH SPEED SCROLL HI
If there is much noise on the screen,
or when travelling
at
high speeds,
the
High Speed
Scroll mode may be effective in showing targets
such
as
fish. When this feature is turned on, all targets
(including
the bottom sig-
nal) will be scrolled extremely
fast across the screen. Noise will still be
displayed
as single
dots, however true
target echoes such as fish will be
displayed
as very long lines that will stretch out across the screen. This
separates
the
fish from the noise.
Random dots are noise. Fish are long
lines that may or may not arch.
To turn on HIGH SPEED SCROLL, press 2nd-4.
To turn off HIGH SPEED SCROLL, press 2nd-4
again.
It is important
to note when the HIGH SPEED SCROLL is enabled, auto
sensitivity, auto ranging,
and the digital (including the digital alarm)
will be
turned off. When the HIGH SPEED SCROLL
is turned
off, these functions
will still be off.
17 18
24———
•
...
- r1
'F—
DISCRIMINATION
LEVEL
Figure 14
innimuu n
LI
iiiii•iHii
AUTO.
•,•• ri'
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;;: !C
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:ç
AUTO.
RANG! NO
Figure 15 Figure 16
HIGH SPEED
SCROLL HIGH SPEED SCROLL
OFF ON
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