Furuno FAR-2107 Series Service Manual page 446

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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.

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.

Fig. 7.3.11 ZOOM processing

7.3 Processor Unit (RPU-013)