Furuno NAVNET 1823C - Manual (Page 203)

5. CUSTOMIZING YOUR UNIT
5-29
5.9 Sounder Setup
This section shows you how to customize your network sounder to your liking.
You can set fish alarm sensitivity, fine tune sensors, etc.
5.9.1 System setup
1. Show the sounder display, then press the [MENU] key.
2. Press the SOUNDER SYSTEM SETUP soft key.
SYSTEM
SETUP 1
EDIT
SENSOR
SETUP
RETURN
FISH ALARM LEVEL MEDIUM
TRANSMISSION ON
TVG - HF 3
TVG - LF 3
ECHO OFFSET - HF +00
ECHO OFFSET - LF +00
BOTTOM LEVEL - HF +000
BOTTOM LEVEL - LF +000
KP PULSE INTERNAL
SMOOTHING SM3
TLL OUTPUT ON
NEXT
PAGE
SYSTEM
SETUP 2
EDIT
SENSOR
SETUP
PREV.
PAGE
STC - HF 00
STC - LF 00
FREQ. ADJ. - HF +00.0%
FREQ. ADJ. - LF +00.0%
TARGET ECHO NORMAL
Page 1 Page 2
Sounder system setup menu
Sounder system setup menu description
Item Description Settings
Fish Alarm
Level
Sets the fish alarm sensitivity; that is,
the minimum echo strength which will
trigger the fish alarms. High: Orange and stronger echoes
trigger the alarm.*
Medium:
Yellow and stronger echoes
trigger the alarm.*
Low:
Green and stronger echoes
trigger the alarm.*
* = 8-color display
Transmission Turns TX power on/off. On, Off
TVG
(HF,LF) TVG (Time Varied Gain) compensates
for propagation attenuation of the
ultrasonic waves. It does this by
equalizing echo presentation so that
fish schools of the same size appear in
the same density in both shallow and
deep waters. In addition, it reduces
surface noise. Note that if the TVG
level is set too high short range
echoes may not be displayed. 0-9
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