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Press the menu key to select "sonar" menu to enter the sensitivity sub-menu.
Optional settings:"1%"to"100% or "Auto".
Users can filter the sonar echo signals by adjusting the sensitivity until the
signal information they need is displayed on the screen. If you want to see
more details, try increasing the sensitivity, a little at a time. At high sensitivity
value, a lot of underwater noise will also be displayed on the screen. If you
don't want to see these underwater noises, you can reduce the sensitivity
value to filter them. When the sensitivity is set to "Auto", the system will
automatically set the sensitivity value according to different depths of water, so
that the users do not need to manually adjust the sensitivity
There are 1%~100% sensitivity levels in the menu for users to choose.
Sonar fish finder is a device that can emit ultrasonic waves and analyze
reflected waves. When the fish finder emits sound waves in the water, all
objects whether they are large, small, soft or hard, will generate a reflection
wave. Larger or harder objects sometimes generate multiple reflection waves.
So it needs a "sieve" filters out unnecessary information. The sensitivity here is
the "sieve pore" of the "sieve". The higher the sensitivity, the "smaller" the
"sieve pore".
Increasing the sensitivity is equivalent to reducing the "sieve pore", so there will
be more stuffs left on the "sieve" (the information displayed on the screen),
which may cause the information displayed on the screen to be cluttered.
Decreasing the sensitivity is equivalent to increasing the "sieve pore", so there
will be less stuffs left on the "sieve"(the information displayed on the screen),
and the system will filter out some information to make the display screen
more concise. But be aware that what you filter out may be also important
information.
Therefore, it is important to choose the appropriate sensitivity value and the
depth range. In general, we recommend that you increase the sensitivity when
the water is deep or clear. You can reduce the sensitivity when there are
more impurities or turbidity water or there is in shallower water to reduce
some false detection results.
When there are many fish, you can also use this function to distinguish big and
small fish. Decrease the sensitivity, the "sieve pore" will be enlarged, then the
objects with weak reflection waves will be filtered out, and the rest are
relatively large fish.
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