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It is not possible to use Zoom in conjunction with the Large Digital
View.
To disable Zoom, press the MENU button until the Zoom menu is on-
screen. Use the UP ARROW to highlight Off, and let the menu time
out.
When the unit is powered off, the Zoom menu returns to Zoom Off.
Depth Alarm. The 400TX contains an audible alarm to warn you of
shallow water depths. The alarm is adjustable to depths of 2' (.6m) to
99' (30m). When the alarm is enabled, an audible alarm sounds if the
water beneath the boat is equal to or less than the selected alarm
depth. The alarm sounds continuously for about five seconds, and
then intermittently to remind you that you are still in shallow water.
Additionally, the 400TX can anticipate quickly changing terrain and
sound the Depth Alarm before the bottom depth actually reaches the
preset alarm depth.
Fish Alarm. The Fish Alarm alerts you to the
presence of fish, or other targets not
connected to the bottom. The Fish Alarm
has three different settings that correspond
to the three different size fish symbols shown onscreen.
The default setting is "OFF." With the "Large fish only" setting, the
400TX alarms on only those targets that are represented by the large
fish symbols. The 400TX can be set to alarm on only large and medium
fish, or set to alarm on all fish.
Once the Fish Alarm is enabled, the 400TX emits an audible beep
when the selected size fish symbol appears on-screen. The sound is
slightly different for each of the three fish symbol sizes, so with practice,
it is possible to distinguish the size of the detected fish without looking
at the unit.
Fish Alarm settings are remembered when the unit is powered off.
Triplog. Triplog provides a running log of information based on input
from the Temp/Speed sensor.
Since Triplog requires information from the Temp/Speed sensor to
operate, if this sensor is not detected by the 400TX, the Triplog menu
will not appear as an option.
Triplog provides four pieces of information: the total time elapsed since
power-up or reset, the distance traveled since the 400TX was powered
up or reset, the average speed, and the input voltage from your boat's
electrical system.
The time, speed and distance calculations are useful for tracking your
progress on a trip. The input voltage is useful for determining the
condition of the charging system of the boat. When used in a portable application or whenever
the 400TX is operated from a battery source, the voltage number can be used to determine
battery life. The 400TX will operate at voltages from 10 to 20 VDC. Voltages in excess of 20 or
less than 10 VDC cause the unit to power off. The Triplog resets at power off.