Chapter 3 Setup after installation
MDC-2900 Series
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0092629012-07
3.2.12 Changing of formats of input/output ports of navigation devices, position
and ship speed (IEC 61162).
When the data is correctly input in each port and is not displayed on the screen, the formats of
signals (IEC 61162) may be unmatched. In this case, display [INPUT] menu mentioned in 3.2.11,
and confirm that a mark is displayed at the intersection point of the input sentence and the input
port. When a mark is not displayed, set each format (baud rate) of input/output so as to match with
those of connected sensors with input sentences.
The baud rates are:
IEC 61162-1: 4800 bps
IEC 61162-2: 38400 bps
NSK: NSK original format
Default values per port is set as follows:
Navigation device: IEC 61162-2
Position (EPFS): IEC 61162-1
Ship speed (SDME): IEC 61162-1
Gyro (Gyro): IEC 61162-2
Example of change of setting:
[MAINTENANCE] => [I/O] => [DETAIL] => [FORMAT] => [NAV] => [IEC 61162-1], and then
press [ENT] key after selection.
Caution: When NSK is initialized as shown in 3.2.3.2, the gyro port is set to the NSK original
format. It is not possible to set input and output to a different format separately in a port.
3.3 Setting of [PRESET] menu
3.3.1 Change of maximum adjustable range of [GAIN] knob
Display sensitivity of the screen against the knob of GAIN is set. When the sensitivity against
rotation of the knob is too high or too low, it can be adjusted with knob.
(1) Press [ + ] key (or [ - ]) key of the range on the transmission screen to set the range of the
screen at 12 NM or higher.
(2) Set the knobs of RAIN and SEA at 0, the knob of GAIN at scale 8 and the knob of BRILL at the
maximum, respectively.
(3) Please confirm that IR is 3. Otherwise, set the IR at 3. Setting procedure of IR3: Put the cursor
=> on IR OFF or numerical value on the screen and press [ENT] key to make the numerical
value to be 3.
(4) Select [MAINTENANCE] => [PRESET] => [GAIN MAN] => to highlight the last digit value.
(5) Watching the white noise on the screen, change the setting value for gain with moving the
trackball up and down, and press [ENT] key at an appropriate point for setting.
The set value is applied to the entire range.
3.3.2 Setting when there is difference in GAIN at changeover of range
Maximum gain can be set per pulse width corresponding to ranges. At first, watch a target on the
radar screen. If the strength of this target varies with changes of the range, it is necessary to
adjust GAIN OFFSET BW.
