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4.3 Antenna Gyro and LNB Faults
Section 5, “Maintenance,” provides detailed instructions for
authorized service personnel who may be required to replace the
TracVision C3 antenna gyro or the LNB.
4.4 Computer Diagnostics
TracVision C3 has been designed to provide diagnostic readouts
viewed on a personal computer having an RS-232 serial
communication port. If you are unable to isolate a system
problem with the foregoing troubleshooting tools, set up for
computer diagnostics as described below. System problems will
most likely be found somewhere through the diagnostic readouts.
The diagnostics procedure requires terminal emulation software
such as PROCOMM or Windows Terminal or Hyperterminal. Use
the settings appropriate to your application.
1. Connect one end of the PC data cable to the DB9
connector on the switchplate. Connect the other
end to the serial port on the PC (a 9-pin/25-pin
connector adapter may be needed for some PCs).
2. Open the terminal emulation software and
establish the following settings:
•9600 baud
• no parity
•8 data bits
•1 start bit
•1 stop bit
• no flow control
3. Apply power to the TracVision C3 system and
allow the system to complete full initialization.
Data should be scrolling on the PC display to
identify any system problems detected. If no data
is seen, recheck your connections and the terminal
software setup.
4-5
Troubleshooting
54-0159 Rev. G