Garmin FishFinder 340C Owner's Manual page 43

• Gain—controls the sensitivity of the Fishfinder's sonar
receiver. Auto (default) is the recommended setting. It
automatically sets the sonar sensitivity. You can also set the
gain manually. To see more detail on the screen, increase the
receiver sensitivity by selecting a higher gain. If there is too
much detail or if the screen is cluttered, lower the sensitivity
(lower the gain) to increase the clarity of the screen. If
Frequency is set to Dual, you can set the Gain separately for
each frequency (50 kHz and 200 kHz).
• Color Gain—controls what colors are applied to the objects
on the screen. Auto (default) is the recommended setting.
It automatically sets the colors, based on your Auto Color
Gain setting. You can also set the Color Gain manually.
If Frequency is set to Dual, you can set the Color Gain
separately for each frequency (50 kHz and 200 kHz).
• Beam—only appears when using a dual beam transducer.
This controls the angle of the transducer beam. Wide beam
allows you to see more fish in shallow water, even off the
sides of the boat. You can also choose Narrow (default)
beam.
• Whiteline—can make it easier to identify the hardness of the
bottom (hard or soft). This setting adjusts a brightly-colored
highlight of the strongest signal area of the bottom.
Fishfinder 340C Owner's Manual
U F
SING THE ISHFINDER
Off (default)—all high-intensity bottom returns appear as a
solid color.
Whiteline Is Turned On
On—the strongest signal from the bottom appears as a bright
color.
• Frequency—only appears when using a dual frequency
transducer. This allows you to choose a sonar operation
frequency. You can choose 200 kHz, 50 kHz, or Dual
frequency (to alternate between the two frequencies).
• Scroll—adjusts the rate at which the Sonar Pages scroll
from right to left. Ultrascroll
select a scroll rate from 90% to 100%. Auto automatically
adjusts the scroll rate according to the boat's speed. (See also
"Automatic Scroll Speed Limit" on page 30.)
340C > U A
SING THE DJUSTMENT
Whiteline Is Turned Off
(default) is used when you
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