Installation manual

Simrad SH80
110
851-164300 / C
9.9 Self-noise test
This test procedure will allow you to check the system’s self-noise.
Observe the following procedure to prepare for the self-noise test.
1 Start up the sonar.
2 Select the following parameters in the menu system to
execute a self-noise test of the sonar installation.
a Select the Setup menu.
b Locate the Test... button, and press it to bring up t he
System Test menu.
c Press the Test C o n f ig button to access the Te s t Con f i g
submenu in the lower part of the menu field.
d Select Noise & VR to select the Noise test menu settings.
- After the preparations described above has been carried
out, the echo level for the selected audio beam will be
displayed in the Echo Level button in the System Test
menu.
3 If noise is shown on the display, tur n the white audio line
with one of the two manual training buttons to the noisy area
on the display.
- The buttons in question are the two buttons on the
right-hand side of the Train field on the Operator Panel.
4 Read off the echo level (from the menu button).
- Write down the measured echo level here.
Echo level (dB):
5 Switch off the sonar.