7.5.6 Bottom Range; 7.5.7 Frequency; 7.5.8 Interference Rejection; 7.5.9 Sensitivity Menu - VDO MAP 7w Plus GPS User Manual

Range and Bottom Lock Mode.
[MENU] + "SHIFT" + [ENTER]
NOTE The bottom Range, Depth, Shift will apply to the currently selected frequency.

7.5.6 Bottom Range

This option is available when Range Mode is Bottom Lock.
[MENU] + "BOTTOM RANGE" + [ENTER]

7.5.7 Frequency

Allows you to choose the frequency between Auto, 50 kHz or 200 kHz when single
frequency page is selected.
[MENU] + "FREQUENCY" + [ENTER]

7.5.8 Interference Rejection

Selects a filter to remove interference from other Fish Finders.
[MENU] + "INTERFER REJECT" + [ENTER]

7.5.9 Sensitivity Menu

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]
Frequency : ONLY
1
parameters are applied.
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.
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.
STC Length : If STC is Custom, it is possible to change the Length of the Sensitivity Time Constant.
STC Strenth : If STC is Custom, it is possible to change the Strength of the Sensitivity Time Constant.
Surf Noise Filter : This function implements an advanced time varying filter that allows suppressing the surface
2
clutter efficiently while leaving fish targets visible.
NOTE The Frequency value is only displayed: to select the desired frequency see the
1
previous Par. 7.5.7.
NOTE Thus imposing the capability of the Fish Finder to correctly detect the weakest
2
echoes coming from a very deep bottom.
7.5.10

Display Setup Menu

The Display Setup Menu allows you to change the color scheme of the Fish Finder
display, adjusts the chart scrolling rate, enables or disables the White Line and
allows determining the graphical representation of fishes.
[MENU] + "DISPLAY SETUP" + [ENTER]
Color Settings : Allows you to change the color scheme of the Fish Finder display. The available colors are Blue
Background, White Background, Black Background, Gray Scale and Reversed Gray Scale.
Scrolling Speed : Adjusts the chart scrolling rate. Note that the scrolling rate is limited by the sound speed and the
depth according with the following relation: the deeper the setting, the slower the scrolling rate.
100% is the maximum possible.
White Line : Controls how the chart plotter displays information about the bottom type (hard or soft).
Fish Symbols : Allows determining the graphical representation of underwater suspended targets: Echo/Echo+Icon/
Echo+Icon+Depth/Echo+Depth/Icon/Icon+Depth. The Fish icons displayed are among four
different shapes depending on the size of the Target (Small, Med, Big, Huge).
Water Temperature: Allows you to choose the Water Temperature label displayed over the echogram between Primary
and External.
User Manual
D F
IN THE UAL REQUENCY PAGE
Allows you to select the Frequency to which the Sensitivity
79