Operation Manual

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User Manual
6.5.6 SHIFT
Shows the depth from which start the bottom scanning. This option is available
only when Range Mode is Manual and it is disabled in Auto Range and Bottom Lock Mode.
'MENU' + "SHIFT" + 'ENTER'
6.5.7 FREQUENCY
Allows you to choose the frequency among Auto, 50 kHz or 200 kHz when single
frequency page is selected.
'MENU' + "FREQUENCY" + 'ENTER'
6.5.8 INTERFERENCE REJECTION
Selects a filter to remove interference from other Fish Finders.
'MENU' + "INTERFER REJECTION" + 'ENTER'
6.5.9 SENSITIVITY
The Sensitivity menu is accessible both from the Fish Finder Setup menu and by
pressing 'ENTER' when in Fish Finder pages. All settings in the Sensitivity menu are
related to the Frequency selected.
'MENU' + "SENSITIVITY" + 'ENTER'
6.5.9.1 Frequency O NLY IN THE D UAL F REQUENCY PAGE
Allows you to select the Frequency to which the Sensitivity parameters are applied.
Note
The Frequency value is only displayed: to select the desired frequency see the previous Par. 6.5.7.
6.5.9.2 Gain
Allows you to control the Gain of the unit's receiver. To see more details on the
screen, increase the receiver sensitivity by selecting a higher gain percentage. If there is too
much detail or if the screen is cluttered, lowering the sensitivity may increase the clarity of
the display.
6.5.9.3 STC
Sensitivity Time Constant: it is a time varying gain curve which attenuates the sonar
receiver gain in shallow water, increasing the gain gradually as the depth increases. This is
for the purpose of filtering out surface clutter.