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The sound pulses are transmitted at various frequencies
depending on the application. Very high frequencies
(455 kHz) are used for greatest definition but the
operating depth is limited. High frequencies (200 kHz)
are commonly used on consumer sonar and provide a
good balance between depth performance and
resolution. Low frequencies (83 kHz) are typically used
to achieve greater depth capability.
The power output is the amount of energy generated
by the sonar transmitter. It is commonly measured
using two methods:
• Root Mean Square (RMS) measures power output
over the entire transmit cycle.
• Peak to Peak measures power output at the
highest points.
The benefits of increased power output are the ability to
detect smaller targets at greater distances, ability to
overcome noise, better high speed performance and
enhanced depth capability.
DualBeam PLUS™ Sonar
Your 700 Series™ Fishing System uses a
200/83 kHz DualBeam PLUS™ sonar system
with a wide (60°) area of coverage.
DualBeam PLUS™ sonar has a narrowly
focused 20° center beam, surrounded by a
second beam of 60°, expanding your
coverage to an area equal to your depth. In
20 feet of water, the wider beam covers an
area 20 feet wide. The 20° center beam is
focused on the bottom, to show you
structure, weeds and cover. The 60° wide
beam is hunting for fish in the wide coverage
area. DualBeam PLUS™ sonar returns can be
blended together, viewed separately or
compared side-by-side. DualBeam PLUS™ is
ideal for a wide range of conditions - from
shallow to very deep water in both fresh and
salt water. Depth capability is affected by
such factors as boat speed, wave action,
bottom hardness, water conditions and
transducer installation.
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