Vexilar FL-8 - Manual (Page 2)

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GENERAL DESCRIPTION
The FL-8 is a compact and lightweight depth sounder designed
for serious anglers. Besides indicating depth, the unit also shows
changes in bottom content and conditions. It can also discriminate
between large underwater targets, such as fish, and smaller targets
such as bait fish and plankton.
The unit transmits bursts of high frequency pulses, which are con-
verted from electrical to mechanical energy by the transducer. These
"sound" pulses radiate from the transducer downward and are reflect-
ed back up to the transducer where the energy is converted back to
electrical signals. The FL-8 then processes these signals and displays
them.
The circular display is
accomplished by attaching an
LED (Light Emitting Diode) to
a wheel, which is then spun at
a high speed in the clockwise
direction. This allows for an
extremely high speed update.
The bottom, as well as other
targets, can be displayed as
red, orange, or green to indi-
cate strong, medium and
weak signals respectively.
The FL-8 also has an alarm, which can alert you to fish or shallow
water. The user controls this alarm so that anything that appears
above a specific depth will sound the alarm.