Klein Marine Systems, Inc. HydroChart 5000, Operation And Maintenance Manual

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Sonar Head Unit
A-5
To verify that the transmitters are working, run an oscilloscope probe with the
scope tip in place along the transducer and see the transmit waveform as in the
image in Figure A-3. If there is a problem with a transmitter, it will show up as a
very weak transmit waveform.
A.4.3 Checking the Receivers before Deployment
With the Sonar Head Unit running on deck, start SonarPro. Allow the TVG gain to
adjust, and then rub the transducers firmly, one transducer at a time. This is the rub
test. The image in the Sonar Viewer window should look something like that in
Figure A-4.
A.4.4 Setting up for Testing the Electronics
Remove the Sonar Head Unit electronics as described in “Disassembling and
Reassembling the Sonar Head Unit” on page 4-3 and place the electronics in a
position so that you can reconnect the transducers.
A.4.5 Checking the Multiplexer Board
The Multiplexer board performs the following functions:
• Receives the 200 VDC and telemetry from the surface and
separates out the telemetry from the 200 VDC.
• Routes the 200 VDC to the power supply, and then receives the
converted ±12 VDC.
• Routes the 200 VDC to the Transmitter boards.
Figure A-3:
Transmit Waveform