Simrad DX45, Installation Manual

Page: 58 / 94

Chapter 9-4 Setup menu
refer to minimum (first set of numbers) and maximum (second set
of numbers) allowed STC value, the automatic function will never
use an STC outside this interval. The third set of numbers equals the
sensitivity of the function. The higher the number (more sensibility),
the more STC filter.
If necessary, the factory presets can be adjusted to expand or limit
the effect of the auto function, but first check if Gain Auto needs to
be adjusted (see below). After the adjustment, the new values will be
the new AUTO settings. If a new scanner type is recognized, these
parameters are set to default. During adjustment of minimum and
maximum, the display will show the current value. The auto function
is active when the sensitivity is adjusted. The auto function param-
eters will take effect when the auto function is selected.
Gain Auto
values for the automatic Gain mode. The first two set of
numbers will define the limits of the automatic functions.
• Gain Auto settings
To adjust the preset values, you first have to:
1. Adjust Rain to minimum acceptable value: move cursor to the
‘Rain’ bar, and adjust with +/- keys.
2. Adjust Sea to minimum acceptable value: move cursor to the ‘Sea’
bar, and adjust with +/- keys.
3. Set ‘Tune’ bar to ‘AUTO’ mode: move cursor to the ‘Tune’ bar and
press [CLR].
4. Choose a displayed range of 6nm (press key [7]) or higher.
Now you are ready to adjust the Gain Auto values in the lower part
of the Radar setup display:
First 3 digits - minimum: Adjust to a minimum value, which will
show an acceptable radar image.*
Last 3 digits - maximum: Adjust to maximum acceptable level of
noise.*
*) wait for screen to update to see the result of adjustment.
• Sea Auto and Sea Harbor settings
Sea Auto should be adjusted to an offshore situation, and Sea Harbor
to a harbor situation.
To adjust the preset values, you first have to check that Gain Auto is
set correctly - see above, and then:
1. Choose a displayed range of 0.5nm (press key [3]).
2. Set ‘Tune’ bar to ‘AUTO’ mode: move cursor to the ‘Tune’ bar and
press [CLR].
3. Set ‘Gain’ bar to ‘AUTO’ mode: move cursor to the ‘Gain’ bar and
press [CLR].