3-8 hsb
2
PLUS Series LCD Display
Adjusting Gain, Sea
Clutter, Rain Clutter
and Tune
4. Usethetrackpadto move thesliderup ordown.Youcanpressand holdthe
control to move the slider quicklyrather than in single steps.
Theimageonthescreenchangesasyoumovetheslider,sothatyoucansee
the effectof your adjustment.
IfyouselectMANUALTUNE adjustment,an8-stepsignal-strengthindicator
bar is displayedabove the slider. Adjust the sliderto obtain the maximum
reading on the indicator.
Note: Because the changes to the settings are made immediately, you cannot
revert to the previous setting by pressing CLEAR.
5. When you have set all the controls to the levels you require,press ENTER,
or CLEAR to clear the sliderdisplay. The status bar is updated to indicate
which controlsare switched to Auto or On.
Gain Control and Sea Control
The GAIN control can be set to either Auto or Manual. In Auto mode, the
PathfinderPlusradaroptimizesthesetting.TheSEA controlcanbesettoAuto-
Harbour (default),Auto-Offshore or Manual mode. In Auto-Offshore mode,
thePathfinderPlusRadaroptimizesitssettingstoaccountfortheeffectsofsea
clutter. In harbours or close proximityto land differentauto settingsmay
be necessary to cater for the effectsof land clutter. To avoidlosing small
targetsit is thereforeadvisable to set the Sea controlto Auto-Harbour
mode.Alternatively, set both Sea and Gain to Manual mode then adjust
the settings to ensure that all close small targets are visible.
The GAIN control adjusts the level of the display of signals received from the
scanner;it is equivalent to a volume control on a radio.
Becausethe SEA controlaffectsthe gain,youmayneedtomanuallyreadjustit
if you manually change the Gain setting.
Gain Control
When the GAIN control is set to Manual, you should check it every time you
changethe range scale.
On long range settings,the gain shouldbe set to give a slight speckle in the
backgroundof the radar picture. Do not set the gain too low, oryou may miss
smallor weak targets.
On shorter ranges, you may wish to reduce the gain slightly to reduce the
speckleand thereforeimprove targetdefinition.
MANUAL
GAIN
50%
81186_3.book Page 8 Thursday, August 22, 2002 8:23 AM
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