Filter
Top Products
5. CUSTOMIZING YOUR UNIT
5-31
Sounder system setup menu description (con’t)
Item Description Settings Default Setting
TVG
(50 kHz,
200kHz)
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 3 (both 50 kHz and 200
kHz)
Echo Offset
(50 kHz,
200 kHz)
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. The
default setting for both 200 kHz and
50 kHz is zero.
-50 - +50 0 (both 50 kHz and 200
kHz)
Bottom Level
(50 kHz,
200 kHz)
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 50 kHz and
200 kHz, 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 0 (both 50 kHz and 200
kHz)
KP Pulse Selects source of keying pulse. Internal,
External (See
installation
manual.)
Internal
Smoothing Smooths echoes to present stable
display. The higher the setting the
greater the smoothing.
SM1-SM4,
OFF
SM3
TLL Output Outputs cursor position to external
equipment.
ON, OFF ON
SENSOR
SETUP
(soft key)
Offsets speed, depth and water
temperature indications and speed
of sound.
See next section for details.