MAQ SONAR 22KHz, Техническое и монтажное руководство

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Move down to the Gain (GN) control and adjust to obtain a clearly defined image of the
target. Setting this control too high will cause the display to become cluttered. If the
target object does not appear in correct orientation to the vessel see the System Setup -
Transducer Alignment section. Adjust the gain control until the level of the background
clutter is visible without overpowering the display.
The Near (NG) and Far (FG) gain controls should only be adjusted with the vessel u nder
way. Factors such as salt content and water temperature affect these adjustments .
Reference Operators manual for typical settings.
Switch the Pulse length (PL) to Short pulse. The resolution of the display will increase to
display finer detail. The clutter level viewed previously has also increased as the higher
system bandwidth used in short pulse transmission opens to acquire this detail. For your
reference short pulse is used to obtain maximum resolution on short to medium range
targets. Medium to Long pulse settings increase the transmit power and distance while
the bandwidth reduces correspondingly to reduce the effect of greater power on the
insignificant targets. With the pulse length set to Short pulse, adjust the gain control until
the background clutter is easily viewed.
Move up to the top of the menu panel and right-click to the Display menu.
Adjusting the Color Resolution (CR) will affect the
appearance and discrimination of the display. 8
colors palette provides distinct transitions while
the 64 color palette provides a finer view of the
target characteristics.
Peak Detection (PD) increases the high level signal
handling of the display to increase the ability to
pinpoint the densest population of a school.
Move to select the Clutter Level (CL) control.
Display Menu
The first stages of the Clutter Level control (selections 1 through 6) cause the system to
drop out successive color levels as the control level is increased. Low level signals such as
the clutter will fade into the background while higher level targets remain untouched. The
upper stages of the Clutter Level control (selections 1a through 6a) compress the lower
curve of the color discrimination to reduce clutter detection while maintaining fine level
target indication. Higher level targets remain untouched.
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