Raymarine E Series Guia de Instalação descarregar pdf (Página 106)

5-12 E-Series Networked Display Reference Manual

• HBR (Automatic Harbor mode) - this takes account of the effects of land clut-

ter so that small targets are not lost. It should be used when you are in harbor or in

close proximity to land.

• OSH (Automatic Offshore mode) - the system continually calculates the

required level of sea clutter control.

• MAN (Manual mode) - this enables you to select the sea clutter level and then

adjust the settings to ensure that all close small targets are visible. On short range

scales, do not set the SEA control so high that all clutter is removed, since this could

stop you seeing echoes from close targets. This should be used in conjunction with

the GAIN function (described below).

Any changes that you make are retained when you power off your system.

Gain

The gain function makes the radar picture clearer by changing the sensitivity of radar

reception.

If you set the GAIN to MAN (manual), you should check it every time you change the

range scale:

• For long ranges - select a sensitivity level that gives a slight speckle in the back-

ground. Be careful not to set the gain too low, or you may miss weak or small tar-

gets

• For shorter ranges - reduce the gain slightly to reduce the speckle and therefore

improve target definition.

Tune

The TUNE function is used to fine tune the receiver in the scanner for maximum target

returns on the display. In AUTO mode, the radar tunes itself automatically on all range

scales. It is recommended that you leave the TUNE function in AUTO

mode, to ensure that the radar receiver is always tuned to receive the

maximum signal.

If you do set the TUNE function to MANUAL, you will need to adjust it about 10 minutes

after you have turned on the radar, since the required setting will change after the

magnetron has warmed up. You should adjust the control to obtain the maximum

signal strength (indicated by the eight step horizontal bar.). If you cannot tune the

radar successfully, refer to the Installation Guide.

FTC

You can use the Fast Time Constant (FTC) function to remove areas of clutter at a

distance from your boat or to distinguish between two very close echoes on the same

bearing, which may otherwise merge and appear as one echo

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Raymarine E Series Guia de Instalação Página 106