Simrad SP270 Installationshandbuch Seite 112

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Seitenansicht 111
Simrad SP 270
Self -- no ise,
test '
In order to make a self-noise test of the sonar installation
, start
up the sonar and make the following settings
in the menu:
RANGE......
GAIN. . . . . . . :
MODE. . . .
. . . :
PULSE FORM. . :
TX POWER...
PING SECTOR:
TVG. . . . . . . . :
AGC. . . . . . . . :
RCG. . . . . .
. . :
PP FILTER..
COLOURTHRES:
DISPLAYGAIN:
2500 M
BOW UP
CW-NORM
OFF
OMNI
OFF
OFF
OFF
OFF
Now, when entering the TEST in the menu
, the text ECHO
LEVEL will be be followed by the dB
value of the self-noise.
If noise is shown on the display,
turn the white audio line
with one of the two manual
training buttons (the lower
buttons on the right-
hand side) to the noisy area
on the
display.
Write measured echo
level here:.................................
dB.
The self-noise level should be -
35:1:: 3' dB.
Switch OFF the Sonar Control Unit.
160573/A
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