Koden MDC-900 Series, Operation Manual

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Chapter 1 Basic Operation MDC-900 Series
1-7 0093142132-05
1.6 Switch-over of Range
The observation range can be changed.
Change of Range
1
Press the [- RANGE +] key.
When pressing the [+] key, an image shrinks
but the observation range expands.
When pressing the [-] key, the observation
range becomes narrow but the enlarged
surroundings around own ship can be seen.
The value of the range is displayed at the
upper left side of the screen.
Change of Sub-screen Range
Change the range of the lower screen
(sub-screen) of the PPI/PPI menu.
For the PPI/PPI screen, refer to 2.4 Display
Select.
1
Press the [GAIN] knob.
When the [SUB-SCREEN GAIN] appears,
press the [GAIN] knob again.
2
Change the range of the sub-screen range
with the [ ] and [ ] keys.
0.75
3
Press the [MENU] key or [ENT] key to close
the menu.
1.7 Gain Adjustment
Adjust the gain according to the distance range
and reflection from the sea surface/rain/snow to
observe an image easily.
Gain Adjustment
1
When rotating clockwise the [GAIN] knob,
the gain increases.
When rotating counterclockwise the [GAIN]
knob, the gain decreases.

When the short distance or targets are
crowded
, if the gain is reduced, the image can
be easily seen.

When the long distance, if the gain is
increased, it is effective but due to increase of
noise, the image becomes hard to be seen.
Own ship
Land
<Picture of adjusted gain>
Own ship
Land
<Picture of too low gain>
Own ship
Land
<Picture of too much gain>
Result picture after adjustment by [GAIN] knob
In the PPI/PPI menu, the gain of the upper
screen (main screen) changes when the [GAIN]
knob is adjusted.
Adjustment of Sub-screen Gain
Adjust the lower screen (sub-screen) in the
PPI/PPI menu.
For the PPI/PPI screen, refer to 2.4 Display
Select.
1
Press the [GAIN] knob.
When the [SUB-SCREEN RANGE] appears,
press the [GAIN] knob again.
2
Adjust the sub-screen gain again with the
[ ] and [ ] keys.
The gain
increases
when increasing the
numeral and
decreases
when decreasing the
numeral.
5.0
3
Press the [MENU] key or [ENT] key to close
the menu.