KVH Industries TracVision G4 - Manual (Page 99)

Issue 4:
There is no data output through Serial Port #3.
Solution:
Serial Port #3 provides no output when GyroTrac is
configured as a component within a GyroTrac-compatible
TracVision system.
4.4 IRD Troubleshooting
The IRD that was provided with your satellite television service
may also be the cause of less-than-ideal operation. First check the
IRD’s configuration to ensure it is set up for the desired
programming. In the case of a faulty IRD, refer to your IRD user
manual for service and warranty information. If the IRD is both
configured properly and fully functional, contact your local KVH
dealer or service center for assistance.
4.5 Antenna Gyro and LNB Faults
Section 5, “Maintenance” on page 101 provides detailed instructions
for authorized service personnel who may be required to replace
the TracVision G4 antenna gyro or the LNB.
4.6 Computer Diagnostics
TracVision G4 has been designed to provide diagnostic readouts
viewed on a PC having an RS-232 serial communication port. If
you are unable to isolate a system problem, set up for computer
diagnostics as described on the following page. System problems
will most likely be found somewhere through the diagnostic
readouts.
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TracVision G4 Technical Manual