Dualbeamplus™ Sonar; Powering Up The Unit - Humminbird Matrix 15 Mode D'emploi

How Sonar Works
Sonar technology is based on sound waves. The MatrixTM Fishing System uses sonar to locate and define structure, bottom contour and
composition, as well as calibrate digital depth directly below the transducer.
Your Matrix unit sends a sound wave signal and determines distance by measuring the time between the transmission of the sound wave and when
the sound wave is reflected off of an object; it then uses the reflected signal to interpret location, size, and composition of an object.
Sonar is very fast. A sound wave can travel from the surface to a depth of 240 ft (70 m) and back again in less than ¼ of a second. It is unlikely that
your boat can "outrun" this sonar signal.
DualBeamPLUS™ Sonar
Your Matrix 15 uses a dual frequency 200/83 kHz DualBeamPLUS sonar system with a wide (60°) area of coverage.
DualBeamPLUS is optimized to show the greatest bottom definition with a narrow (20°) beam, and the fish and structure
location with a wide (60°) beam. DualBeamPLUS 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. All sonar units typically read to deeper depths in fresh water than in salt
water. Your Matrix transducer also comes with a temperature sensor included!

Powering Up the Unit

Turn on the Matrix unit by momentarily pressing the POWER key. A startup screen is then displayed until the Matrix unit begins sonar operation.
While the startup screen is displayed, you may press the MENU key for the other options listed below. If no key is pressed, the Matrix will begin
Normal or Simulator operation, depending on the presence or absence of a transducer. The following operating states are available:
• Normal – Use for on the water operation with transducer connected.
• Simulator – Use to learn the features and functions of the Matrix unit. Simulates on the water operation.
• System Status – Use to view system connections and conduct a unit self-test.
• PC Connect – Use when upgrading Matrix internal software with a PC and PC Connect cable.
The Matrix unit uses advanced transducer detection methods to determine if a transducer is connected. If the transducer is not connected or is
damaged, the unit will select the Simulator state automatically at startup. If a functioning transducer is connected, the unit will select the Normal
operating state automatically and the unit can be used on the water.
NOTE: When operating in Simulator state with a transducer connected, Menu setting changes are saved to memory. If a transducer is not connected,
changes will not be saved and Menu settings will revert to factory defaults every few minutes.
Sonar Views
Sonar View presents a historical log of the stored sonar returns. The most recent sonar returns are charted on the right side
of the window; as new information is received, the older information is moved across the display. A Digital Depth Readout is
displayed in the upper left corner. A scale with Upper and Lower Depth Range readouts appears along the right edge of the
Sonar View. The scale indicates the distance from the surface of the water to a depth range sufficient to show the bottom.
Depth Range is automatically selected to keep the bottom visible on screen, although it can be manually-adjusted by the user
as well (see Sonar Settings - X-Press
from optional-purchase accessories such as Water Temperature, Trolling Speed, WeatherSense
Barometric Pressure and more. These information boxes can be customized to show only the
information desired (see Advanced User Mode - Select Readouts).
Barometer and Temp/Speed
A Real Time Sonar (RTS®) window appears on the right side of the display. The RTS Window always
accessories are optional.
Additional purchase required.
updates at the fastest rate possible for depth conditions and shows only the returns from the bottom,
structure and fish that are within the transducer beam. In the RTS Window, sonar returns are shown in
shades of gray. The most intense returns are shown as a solid black band that indicates the bottom. The
thickness of the bottom band indicates bottom type. Hard bottoms appear thinner and mostly black;
softer bottoms are thicker and may appear with many gray tones. Above the bottom band, less intense
sonar returns shown as varying shades of gray indicate the sonar returns from fish or structure. The RTS
Window can be turned on or off (see Sonar Settings - Main Menu System).
As the boat moves, the Matrix unit charts the changes in depth on the display to create a profile of the Bottom Contour. The
default presentation highlights the bottom profile with a WhiteLine® feature and gray tones. From the appearance of the
gray tones in the bottom contour, the type of bottom can be determined. A Hard Bottom such as compacted sediment or flat
rock appears as a thinner dark line across the display. A Soft Bottom such as mud or sand appears as a thicker line that contains a transition from
darker to lighter grays. Rocky Bottoms have a broken, random appearance. In shallower water, a Second Sonar Return may appear as a bottom
contour below the main bottom at twice the depth. The second return occurs when the sonar signal bounces between the bottom and the surface
TM
Menu). Up to five additional Digital Readouts display information
TM
Temp/Speed Accessory
is optional.