Simrad SP270 Manual de Instalação descarregar pdf (Página 132)

100

101

Simrad SP 270

SPEED

BEARING

(KNOTS

1200

600 +600

+ 1200 + 1800

Table

Noise measurements

When the measurements are finished, make a plot of the noise

for 00

bearing into table 9. The noise level at full speed should

preferably not exceed the 0 dB line.

The noise/speed curve in table 9 can

give a picture of the ship

best search speed.

In case of very high ship noise level

, the RCG will

regulate the

receiver gain automatically down. This low gain

will then cause

a reduction in the receiving range.

To find

out if a high noise level is caused by flow noise of the

hull

or by the engine/propeller, make the test

described in the

following pages.

160573/A

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