5-9
Figure 5-9: Soft Iron Calibration Screen Prompts
4. Align the tow vehicle with each of the cardinal points again, one at a time, while observing the
Heading display. Verify that the heading is accurate at each point.
5. Exit from Hyperterminal.
6. Double-click the Sonar.exe icon ( ) on the desktop, or turn the tow vehicle power off and then
on again.
The Sonar window will open again.
5
Should some operational or performance problems occur with the 4125 Series Dual-frequency Side Scan
Sonar System, it may be possible to correct them using the troubleshooting guides in the following pages.
For the 4125-P Portable Topside Processor, a tabular troubleshooting guide is provided in Table 5-1, and
for the 4125 Tow Vehicle, in Table 5-2.
These troubleshooting guides identify some symptoms that could occur, and present one or more possible
causes, along with the recommended corrective action for each. Perform the corrective action for any
given symptom in the order of probable causes, which generally corresponds to the degree of
troubleshooting difficulty, from the simple to the more complex.
Before proceeding with any corrective action, verify that the topside processor is plugged into an
appropriate AC or DC power source and that the processor is switched on.