Manual

June 2004 Isis® Sonar User's Manual, Volume 2 111
Note: For all Isis defaults (shown as italicized entries in Table F-2), be sure to refer
to your manufacturer’s sonar documentation. It may be that your sonar manufacturer’s
recommended settings are more appropriate for your situation.
If you wish to change any of these jumpers, please contact Triton Elics Technical Support
before opening your SIU4.
F.2.3 System Tests Using the SIU4-2
One of the more important functions of the SIU4-2 is to act as a first-level troubleshooting
tool. Through the SIU4-2 you can isolate certain hardware actions that you might suspect
aren’t working properly. In turn, these isolation techniques help you determine whether
you are having hardware or software problems.
After you complete your test, be sure to reset all attenuation switches
back to 0. If you leave any or all attenuation switches at the high (9)
setting, the recording of your images will be impaired—even to the point
of making your imagery worthless for viewing!
If, for example, the imagery you may be observing during an Isis software doesn’t “look
right” to you, you might be having a problem with one or more I/O channels connected to
Isis and the SIU4-2. As a first step in isolating the problem, you can hook up the SIU4-2
in the configuration shown in Figure F-1.
Appendix F: Working with Signal Interfaces