MDC-2900 Series
Chapter 3 Setup after installation
0092629012-07
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3.3.6 When there is difference in the effect in Manual SEA suppression at
changeover of ranges
The level of suppression effect of Manual SEA can be set for each pulse width corresponding to
each range. At first, set [SEA] at [MAN] and turn [SEA] knob to a moderate degree. Watch a target
on the radar screen. If the strength of this target varies according to the changes of the range,
[SEA MAX OFFSET] needs to be adjusted.
Adjustment method:
(1) Press [ + ] key (or [ - ]) key of the range on the transmission screen to set the range of the
screen at 6 NM. Set [SEA] knob to a moderate degree.
(2) Press [SP/LP] key to set the pulse width at [LP 1].
(3) Watch a stabilized target with intermediate level of gradation.
(4) Press [SP/LP] key to set the pulse width at [MP 4].
When the watched target with MP 4 is weak:
Press [MENU] key and follow the process of [MAINTENANCE] => [PRESET] => [SEA MAX
OFFSET] => [MP4] => and highlight the last digit of the entry frame of numerical values.
Turn the trackball up and down to increase the value so that the target has the same
strength and press [ENT] key at an appropriate point for setting.
(5) Set the range at 3 NM and press [SP/LP] key to set the pulse width at MP 4. Then, watch a
stabilized target with intermediate level of gradation adjacent to 1 NM, and press [SP/LP]
key to set the pulse width at MP 2. Following the same procedure as that in item (4) above,
adjust [MP 2].
(6) Set the range at 1.5 NM. Follow the process of [MAINTENANCE] => [PRESET] => [SEA
MAX OFFSET] => [MP 3] and adjust the value so that the watched target adjacent to 1 NM
in the range of 3 NM has the same strength.
Press [SP/LP] key in the same 1.5 NM range to set the pulse width at MP 1. Following the
same procedure as that in item (4) above, adjust [MP 1].
(7) Press [SP/LP] key in the range of 1.5 NM to set the pulse width at MP 1. Watch a stabilized
target with intermediate level of gradation whose distance is not more than 0.7 NM and set
the range at 0.75 NM. Following the same procedure as that in item (4) above, adjust [SP].
3.3.7 Switching over of FTC or CFAR in anti-rain clutter suppression mode
This mode allows anti-rain clutter suppression knob to be switched over to CFAR or FTC (DIFF).
This has the same function as the anti-rain clutter suppression switch on the operating panel and
the pressing of [ENT] key on the screen with cursor.
3.3.8 Changing of the maximum of anti-rain clutter suppression knob at FTC
This is intended to adjust the maximum value of anti-rain clutter knob when anti-rain clutter is
used in DIFF. When the effect of anti-rain clutter suppression is weak or strong, this can be used.
Set the anti-rain clutter suppression knob at scale 8 in rainfall.
Press [MENU] key and follow the process of [MAINTENANCE] => [PRESET] => [ANTI-RAIN
CLUTTER MAX] and highlight the last digit of the numerical entry frame. Move the trackball up
and down watching the screen, and press [ENT] key when large blocks of rain clutter become
smaller points and just before small boats and seaway buoys will disappear.
