L3 Comminications SERIES 5000 Operation And Maintenance Manual - page 243
of
283
D-40
APPENDIX D General Setup, Configuration and Troubleshooting
Series 5000 Sonar System Operations and Maintenance Manual
P/N 11210060, Rev. 13.0
D.8.1 Testing the Towfish
The towfish block diagram is shown in Figure D-13.
D.8.2 Checking the Telemetry Link to the Towfish
Turn the TPU on and check the LOCK LOSS and ERROR lights. The lights
should be off. If they are on or flickering, there is a problem. Again, a telemetry
link problem could be one or more of the following: towfish fuse failure, cable
assembly problems, miswire, open, using too long a cable, using wrong type of
cable, or a failure in the towfish.
Figure D-12:
Towfish with Bathymetry Transducer Configuration
Figure D-13:
Towfish Block Diagram