Furuno 1823C-BB, Operator'S Manual

Page: 200 / 252

5. CUSTOMIZING YOUR UNIT
5-30
Sounder system setup menu description (con’t from previous page)
Item Description Settings
Echo Offset
(HF, LF) If the on-screen echo level appears to be too weak
or too strong and the level cannot be adjusted
satisfactorily with the gain control, adjust echo
offset to compensate for too weak or too strong
echoes. -50 - +50
Bottom Level
(HF, LF) If the depth indication is unstable in automatic
operation or the bottom echo cannot be displayed
in reddish-brown by adjusting the gain control in
manual operation, you may adjust the bottom echo
level detection circuit, for both HF and LF, to
stabilize the indication. Note that if the level is set
too low weak echoes may be missed and if set too
high the depth indication will not be displayed. -100 - +100
KP Pulse
Selects source of keying pulse.
Internal, External (See
installation manual.)
Smoothing Smoothes echoes to present stable display. The
higher the setting the greater the smoothing. SM1-SM4, OFF
TLL Output Outputs current position to plotter where it is
marked with TLL mark. Use soft key to output TLL. ON, OFF
STC (HF, LF)
(For ETR-30N
only) Adjusts STC level for the high and low frequencies,
and is useful for suppressing surface noise. The
setting range is 0-10; the higher the setting the
greater the extent of suppression. Setting 10
suppresses noise up to several meters. Turn off
the STC when there is no noise on the screen,
otherwise weak echoes may be missed. 0-10
FREQ. ADJ.
(HF, LF) (For
ETR-30N only) Interference from other acoustic equipment
operating nearby or other electronic equipment on
your boat may show itself on the display. You may
suppress these type of interference by adjusting
frequency. -10 - +10 %
TARGET
ECHO
(For ETR-30N
only) Sets fishing objective.
Normal for general fishing, Surface for detecting
surface. Pulse repetition rate is higher than
NORMAL on the specified transducer. Normal, Surface
B:SENSOR
SETUP
soft key
(See next
page.)
Offsets speed, depth and water temperature
indications and speed of sound.
See next section for details.
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