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sensitivity of the receiver, decreasing it near the surface and gradually
increasing it as the depth increases. The maximum depth that SCC will
affect is 75% of the selected depth range. For example, on a 0-60 foot
range with maximum SCC, surface clutter will be reduced down to 45 feet.
There are three levels of SCC available: low, medium, and high. When it’s
turned on for the first time, the SCC level is low. To change it, press the
MENU key, then press the up or down arrow keys until the "Surface Clarity"
menu appears. Now use the left or right arrow keys to change it. When
you're finished, press the EXIT key to erase the SCC menu.
ASP (Advanced Signal Processing)
The ASP feature is a noise rejection system built into the sonar unit that
constantly evaluates the effects of boat speed, water conditions, and
interference. This automatic feature gives you the best display possible
under most conditions.
The ASP feature is an effective tool in
combating noise. In sonar terms, noise
is any undesired signal. It is caused by
electrical and mechanical sources such
as bilge pumps, engine ignition sys-
tems and wiring, air bubbles passing
over the face of the transducer, even
vibration from the engine. In all cases,
noise can produce unwanted marks
on the display.
The ASP feature has two levels - Nor-
mal and High. If you have high noise
levels, try using the “High” ASP setting. However, if you are having trouble
with noise, we suggest that you take steps to find the interference source
and fix it, rather than continually using the unit with the high ASP setting.
However, there are times when you may want to turn the ASP feature off.
This allows you to view all incoming echoes before they are processed by
the ASP feature.
To change the ASP level, press the MENU key then press the up or down
arrow keys until the "ASP" menu appears. Now use the left or right arrow
keys to change it. When you're finished, press the EXIT key to erase the
ASP menu.