The digital normally operates at 192
kHz, however, to penetrate deeper
water, you can switch it to 50 kHz. The
digital's frequency shows just to the
right of the digital depth display.
The digital sonar can be turned off,
however this turns all automatic fea-
tures off also, such as auto sensitivity,
auto ranging,
depth alarms
, and the
Fish ID. feature. Note: The digital so-
nar is turned off when the FASTRAK
mode is turned on.
You can change the digital's frequency, if the optional SAM-50HPD is
installed. To do this, or to turn it off, first press the MENU key, then press
the up or down arrow keys until the "DIGITAL SONAR" menu appears.
Now press the left arrow key to turn it off, or the right arrow key to select
50 kHz. Press the EXIT key to erase the menu.
ALARMS
The sonar unit has three different types of alarms. The first is the Fish
Alarm. It sounds when the Fish I.D. feature determines an echo or group
of echoes is a fish. Another alarm is the Zone Alarm which consists of a bar.
Any echo that appears inside this bar
triggers this alarm. The last alarm is
called the Depth Alarm. Only the bot-
tom signal will trigger this alarm. This
is useful as an anchor watch, a shal-
low water alert, or for navigation.
To adjust an alarm, first press the
ALARM key. The screen shown at
right appears. Follow the instructions
below for setting each alarm.
DEPTH ALARMS
The depth alarms sound a tone when
the bottom signal goes shallower than
the shallow alarm’s setting or deeper than the deep alarm’s setting. For
example, if you set the shallow alarm to ten feet, the alarm will sound a tone
if the bottom signal is less than ten feet. It will continue to sound until the
bottom goes deeper than 10 feet. The deep alarm works just the opposite.
It sounds a warning tone if the bottom depth goes deeper than the alarm's
