Raymarine E Series Guía de instalación Pagina 107

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Chapter 5: Using the Radar 5-13
When the FTC function is turned up, only the leading edge of large (rain clutter) echoes
is shown, while the effect on smaller (ship) echoes is only slight. As the receiver is less
sensitive, and background noise and fill-in returns from land and other large targets
reduced, you should turn the FTC function down when its use is not required. Since
storm cells are usually visible for long distances due to their extreme altitude, you may
wish to leave them displayed so that you can observe the location of bad weather.
Note:
You should use this function in conjunction with the RAIN function to obtain the
best picture.
Rain
Your radar detects echoes from rain or snow. The strength of these echoes is dependent
upon the altitude, range, density and size of the snow flakes or rain droplets and will
appear on screen (see
page 5-5
) as countless small echoes continuously changing size,
intensity and position.
Turning the RAIN clutter function on suppresses the bulk effect of rain returns from
around your boat, so that detection of actual targets is made easier
Manually adjusting the gain modes
If necessary you can set the gain controls manually.
The new values remain set even when you switch off the display and are applied to
both the active window and any other radar windows.
To change the gain modes manually:
1. Press GAIN. The gain adjustment soft keys are displayed.
2. Press the required soft key to select MAN or ON. The adjustment slider is displayed
above the soft key.
3. Use the rotary control to adjust the image. The slider is updated to show the value
of the setting.
4. Press OK or CANCEL to return to the default display.
Using the target display functions
You can use the target display functions to improve target visibility.
TARGETS
DISPLAY...
INT REJECT
ON OFF
EXPANSION
ON OFF
WAKES
ON OFF
D6596-1
CLEAR WAKES
81244_1.book Page 13 Wednesday, December 1, 2004 11:41 AM
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