System Activation and Test
3-21
8.
Select the 50-m range and turn off the high frequency transmitter. Open the
MA-X Viewer window to 50 percent and allow the TVG to normalize; it will
take about two minutes.
9.
Perform a rub test on the port and starboard side scan transducers and the port
and starboard gap-filling transducers to confirm that the receiver mode is
operating properly. Do this test by vigorously rubbing each transducer, one at
a time, while observing the Sonar Viewer window in SonarPro for returns.
10.
Exit SonarPro and turn off the laptop computer and the SP-III TPU or the
SonarPro Workstation and the Rack Mount TPU.
3.8.2 Activating and Testing the System at Sea
To activate and test the system at sea:
1.
Verify that the towfish has been properly set up and the system components
connected.
2.
Turn on the navigation system and let it acquire its location.
3.
Verify that the tow cable is connected to the SP-III TPU or Rack Mount TPU
and the towfish.
4.
Turn on the laptop computer and wait for the Windows desktop to appear.
5.
Do one of the following:
• Turn on the SP-III TPU by switching the A/C-D/C switch to A/C for AC
operation or to D/C for DC operation. The PWR indicator should flash, and
the LOCK LOSS indicator should illuminate. After approximately 1
minute, the T/F PWR indicator should turn on. After an additional 15
seconds, the LOCK LOSS indicator should turn off, and the PWR indicator
should stop flashing and remain on.
NOTE
Should the DC power cord be connected with the polarities
reversed, the D/C POLARITY indicator will illuminate when the A/C-D/C
switch is switched to D/C. Should this situation occur, reverse the
connection.
CAUTION
Serious damage to the towfish electronics may occur if the
towfish is operated on deck for periods longer than fifteen minutes.
Between periods of operation, let the sonar cool for fifteen minutes. In high
temperature climates, protect the towfish from direct exposure to the sun prior to and
during operation.
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