7.3 Processor Unit: RPU-013
7-41
Sweep
n-1
n
n-2
n-3
Range
Output echo
3. Zoom
Zoom magnification can be selected in the setting of 4:ZOOM (OFF/2 TIMES/3
TIMES) of [Menu] -> 9 -> 2:DATA BOX menu.
For zoom processing, select “ZOOM” in the [CURSOR] menu. Place the cursor on the
picture to be zoomed and click the left button. The zoomed picture is displayed in the
data presentation area on the right of the screen. The picture in the normal picture
presentation area has a dotted frame showing a zoomed area.
Fig. 7.3.11 ZOOM processing
4. Signal processing of [PICTURE] menu
4-1. Interference rejection (INT REJECT)
The setting of interference rejection is made in OFF/1/2/3 of the [PICTURE] box menu.
This feature is intended to reduce radar interference form other ships by correlation
processing between previous and past sweeps.
- IR-1: Correlation between the current sweep and last one sweep
- IR-2: Correlation between the current sweep and last two sweeps
- IR-3: Correlation between the current sweep and last three sweeps
For instance, in IR-3 setting, when the same echo is present
on the current and last three sweeps, it is outputted as an
echo. If the same echo is not detected in any sweep, it is
not outputted.
If the TX interval of other ship and own ship are close to
each other, radar interference wave from other ship is
displayed at a similar position to the own ship’s. To avoid
this, in FAR-2xx7 the TX interval randomly varied within a
range of 10 ％ of the TX interval.
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