Humminbird Smartcast RF20 - Manuel (Page 5)

Menu Features
A simple menu system accesses the adjustable features of the SmartCast RF20. To activate the menu system, press the
POWER-MENU button; the first time you do this after power up, the Sensitivity menu choice will appear. Once the RF20
has been powered on, pressing the POWER-MENU button will display the last menu choice viewed. Press the POWER-
MENU button repeatedly to access other SmartCast menu choices, one at a time. When a menu choice is on the display,
use the RIGHT and LEFT Cursor buttons to adjust the menu settings. Menus are automatically removed from the display
after several seconds.
NOTE: Menu settings are not saved in memory. All settings return to factory defaults when the SmartCast is turned off.
Sensitivity
Press the POWER-MENU button until SENSITIVITY appears. Select a higher number to show weaker sonar returns on the
display, or a lower number to remove clutter from the display. Adjusting Sensitivity also affects how sonar returns are iden-
tified as Fish ID Symbols - more fish will be detected at the highest setting of 5, fewer at the lowest setting of 1. (1, 2, 3,
4, 5, Default = 3)
Depth Range
Press the POWER-MENU button until DEPTH RANGE appears. Auto is the default setting. When in automatic, the lower
range will be adjusted by the unit to follow the bottom. Selecting a manual depth range locks it to the setting you select.
(Auto, 10, 15, 20, 30, 60 or 100 feet [3, 5, 6, 9, 18, or 30 meters], Default = Auto)
NOTE: In manual operation, if the water depth is greater than the depth range setting, the bottom will not be visible on the display. Select
Auto to return to automatic operation.
Depth scale changes or signal loss will cause lines with missing detail and/or abrupt changes
in the graphed bottom. When the Depth Range is set to Auto, the depth is set to keep the bot-
tom in the lower third of the screen. The screen image jump shown here is due to an automat-
ic change in depth. New returns graphed at a different scale will not match up with the historic
data already graphed at a higher or lower scale. Vertical lines can also occur as the radio sig-
nal from the RSS is lost and then regained in rough water conditions.
Fish Alarm
Press the POWER-MENU button until FISH ALARM appears. Select Off for no fish alarm, or On for fish alarm. Fish ID
must be set to On for Fish Alarm to work. (Off,On, Default = Off)
Fish ID
Press the POWER-MENU button until FISH ID appears. Select either Off to view “raw” sonar returns,
or On to view fish symbols. Fish ID uses advanced signal processing to interpret sonar returns and
will display a Fish Symbol when very selective requirements are met. Fish Alarm does not sound if
Fish ID is turned off. (On, Off, Default = On)
Fish ID Raw Sonar