Installation manual

Simrad SD570 / Base version
22
851--160117 / B
5.2 Self--noise 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:
GAIN.......: 50
MODE.......: BOW UP
TX POWER...: OFF
PING SECTOR: OMNI
TVG........: OFF
AGC........: OFF
RCG........: OFF
PP FILTER..: OFF
COLOURTHRES: 0
DISPLAYGAIN: 9
Now, when entering the TEST in the menu, the text ECHO LEVEL
will be be followed by the dB value of the self-noise.
j Ifnoiseis shown onthe display,turn thewhiteaudio 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? 3 dB.
j Switch OFF the Sonar Control Unit.