46
Basic Concept
Most sonar systems sold today use a fixed frequency of 200 kHz. This
has been well-accepted by most anglers and boaters for over 40 years.
While not perfect, 200 kHz is suitable to get sonar depth readings down
to 300 feet, even though most sonar systems are actually used in waters
under 40 feet.
Sonar designers fully understand the limitations of a fixed frequency
system, but offering several frequencies in a single system was not
commercially viable until the development of Vexilar’s Broad Band
Ice-Ducer
®
transducer. For the first time, a composite transducer was
made from an array of small crystals interconnected into one compact
housing. The result delivers a wide spectrum of sonar frequencies in one
transducer.
No one frequency is “perfect” for all situations, so the seven frequencies
used for the FLX-30
bb
offer great options for serious anglers looking for
the best possible performance from a single sonar device. For example,
when fishing 300 feet of water, the powerful 160 kHz signal can be used,
but when fishing in only five feet of water, the 300 kHz transmit frequency
is better. With the FLX-30
bb
you can now adjust frequencies and
power levels to get the finest sonar response possible for a given
fishing situation.
START Mode
Before turning on the FLX-30, adjust the Mode Control to the “S”
or START position. This will set the unit to general purpose default
settings that perform well in nearly all fishing situations; from here
it is possible to customize the performance of the unit in many
ways. This mode setting makes it easy to start fishing a new lake
and to remove previous customizations and start over. The display
will show “FACTORY SET DONE!” for about one second.
START Mode Default Settings
Zoom:
OFF
Frequency:
200kHz
Power:
High
Auto Range:
Shallow
Color Palette:
#3
(see page 56)
With the Range Control set to Auto, when powering the unit on
you may see the word “SEARCHING” for up to eight seconds.
The system is looking for the bottom to establish the best depth
range and Interference Rejection setting for you. Once the depth
is found, the digital depth reading and the proper range setting will
be shown at the bottom of the display.
FLX-30
™
BB
OPERATION
If the bottom cannot be found,
the unit is most likely not
getting a strong enough signal to
establish a bottom reading. The
display will ask you to switch to
Manual Depth Range.
Summary of Contents for FL-18
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