Sonic SCS-60, Руководство по эксплуатации

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12. Bearing mark keys The acoustic sound mark is moved clockwise by the
key and counterclockwise by the key.
13. Range keys The display range is changed to one with a longer
distance by the key and one with a shorter
distance by the key.
14. Gain keys The receiving gain is increased by the key and
is decreased by the key.
15. Tilt keys Transmission and reception beam angles are
changed to the water surface direction by the
key and are changed to the sea-bottom direction
by the key.
16. Two-touch key block The keys in this block can be used in combination
with the and keys. Select a function key
first (the light of the key turns ON), and then change
its set value with the or keys.
a. PP filter key This key is used when there is sea noise or
interference from other boats.
In interference removal mode, the interference
removal level can be increased in the order from
"PPF1" to "PPF10." If the interference removal level
is too strong, the detection of small fish schools may
be disabled. Use this key with the value adjusted to
remove noise at the minimum level.
b. Mode key This key is used to change the screen.
a. PP filter key
b. Mode key
c. Sonar memory key
d. Preset key
e. UP key
f. DOWN key