• | TVG (Time Variable Gain) TVG (Time Variable Gain) compensates for the loss of acoustic energy due to geometric spread and absorption.This makes the targets with the same strength appear with the same intensity independent of their physical distance from the
transducer.
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• | Ping-Ping Filter The Ping-Ping Filter presents the echoes based on the current information as well as the "history" of that specific target. The filter adds historical echo data for the target to the new information from the same target. This "mix" causes a more stable presentation, and some interference and noise are removed and/or reduced.This menu option depends on which view in the ME70 presentation that is currently "active".
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• | Single Target Detection The Single Target Detection parameters are used to control the operational settings for the detection of single targets. In order to detect single fish correctly, these parameters must be defined to suit the target characteristics. The chosen settings do not have any effect on the raw data you save during the survey. This menu option depends on which view in the ME70 presentation that is currently "active".
The Single Target Detection parameters are available both as a dialog box and a page. The Single Target Detection dialog box is also used by the Calibration wizard.
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• | Echogram The Echogram dialog box allows you to set up the parameters controlling the echogram presentation. Two pages control the horizontal lines and the echogram type with applied TVG (time variable gain). One page controls how fast the echogram travels horizontally across the presentation.
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• | TS Histogram The TS Histogram settings allow you to shape the vertical bars in the TS Histogram information field to your own requirements. This menu option depends on which view in the ME70 presentation that is currently "active".
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• | Bottom Detection Locating the bottom (seafloor) is important for the ME70 system. The purpose of the Bottom Detection settings is to define the upper and lower depth limits most likely to be used during normal operation. You can also modify the setting for Bottom Backstep to change the bottom detection relative to the bottom echo.
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• | Colour Scale The colour scales used by the ME70 are designed to reflect how strong the echoes are. The echo strength is measured in decibels (dB). Each colour in the scale represents an increase (or decrease) in the echo strength. In the basic colour scale with 12 colours, each colour represents a 3 dB step. The Colour Scale parameters allow you to change the echo strength range (in decibels) that each colour represent.
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• | New Layer Different species often occupy different depth layers. Such layers may be defined by salinity or temperature, or simply by
ambient light or the availability of food. In order to study these species, the ME70 supports a Layer function. By means of this function, you can create your own depth layers in the water column to improve the dynamic data
required for analysis.The New Layer dialog box is used to create and insert a new depth layer.
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• | Layer Properties The Layer Properties dialog box is used to change the current properties of the chosen ("active") depth layer.If you only wish to change the range settings, you can also click and drag the line(s) in the echogram view.
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• | Delete Layer To delete a layer, select it in the echogram or in the Numerical information field (layer data shown with red text), and then click Delete Layer.
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• | Configure Window The Configure Window dialog box provides viewing options for the active window.
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• | Maximize Window The Maximize Window menu entry enables you to enlarge the currently selected window.
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