Operation Manual

User Manual

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

THE

UAL

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.

6.5.9.4 STC Length

If STC is Custom, it is possible to change the Length of the Sensitivity Time

Constant.

6.5.9.5 STC Strength

If STC is Custom, it is possible to change the Strength of the Sensitivity

Time Constant.

6.5.9.6 Surface Noise Filter

This function implements an advanced time varying filter that allows