20
User Manual
3.1.5 Depth
This option is available only when Range Mode is Manual and it is disabled in
Auto Range and Bottom Lock Mode.
[MENU] + "DEPTH" + [ENTER]
3.1.6 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]
NOTE
The Bottom Range, Depth, Shift will apply to the currently selected frequency.
3.1.7 Frequency
Allows you to choose the frequency among Auto, 50 kHz or 200 kHz when
single frequency page is selected.
[MENU] + "FREQUENCY" + [ENTER]
3.1.8 Interference Rejection
elects a filter to remove interference from other Fish Finders.
[MENU] + "INTERFER REJECT" + [ENTER]
3.1.9 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]
Fig. 3.1.9 - Fish Finder Sensitivity menu
NOTE
The Frequency value is only displayed: to select the desired frequency see
the previous Par. 3.1.7.
3.1.9.1 Frequency
This option is available only in the Dual Frequency page. It allows you to
select the Frequency to which the Sensitivity parameters are applied.
3.1.9.2 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 per-
centage. If there is too much detail or if the screen is cluttered, lowering the
sensitivity may increase the clarity of the display.
3.1.9.3 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.
3.1.9.4 STC Length
If STC is Custom, it is possible to change the Length of the Sensitivity Time
Constant.
