Bedienungsanleitung Humminbird 597Ci (Seite 130 von 143) (Englisch)

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Grayscale, Inverse: Inverse Grayscale is a Humminbird® feature that reverses the

correlation of sonar signal strength and the shade of gray typically used to

represent it. The strongest sonar signals are represented by “white“, and

progressively weaker signals are represented in progressively darker shades of

gray. While somewhat counter-intuitive, this method makes the sonar images

crisper, and has the benefit of enhancing the apparent sensitivity because the

weaker signals appear bolder. Inverse grayscale works well in very clear water.

Debris-laden water often appears as a lot of clutter on the screen.

Instant Image Update: Instant Image Update is a Humminbird® feature that

updates all the sonar information on the display when Sensitivity and a variety of

sonar settings (Bottom View, Range, etc.) are modified. This differs from the

traditional functionality that only updates the new sonar information collected

after the setting change. Instant Image Update permits more accurate fine-tuning

of the display because the user can see the results on the complete sonar graph.

When combined with the Freeze Frame feature, the user can adjust and

understand the effects of many different sonar settings quickly and easily.

Maximum Depth Menu: The Maximum Depth Menu is a Humminbird® feature

that optimizes performance based on the maximum operational depth set by the

user. Many Humminbird® units can operate across a very broad depth range (up

to 2500 feet) which causes the unit to “look“ up to that full depth under some

circumstances. Due to the speed of sound in water, this can result in less

responsiveness because the unit has to wait for a longer period of time to receive

the sonar signal. When the Maximum Depth menu is set to a lower value, the unit

only looks up to the setting, which increases the responsiveness of the unit. This

is an important feature for anyone operating in shallower depths!

Noise: Noise is unintentional, external sound waves that interfere with the optimal

operation of sonar. Noise appears as random “dots“ on the display, and is caused

by a variety of sources. Electrical noise (from trolling motors, bilge pumps, VHF

radios) typically manifests as a consistent dot pattern. Electrical noise can be

isolated by selectively turning on and off other electrical devices to determine the

source. Often re-routing the power cable, or connecting to an alternative power

supply (second battery) can help overcome electrical noise. Hydrodynamic noise

(from propeller and/or hull cavitation) has a more random appearance and is

generally related to boat speed, so that faster operation results in more noise.

Hydrodynamic noise can be overcome by proper transducer installation. Many

Glossary

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