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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
TracVision LF/SF components. The TracVision SF does not
include an antenna gyro.
4.4 Computer Diagnostics
TracVision LF/SF has been designed to provide diagnostic
readouts viewed on the TV screen (DIRECTV only) or 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 Windows Hyperterminal or PROCOMM. Use the settings
appropriate to your application.
1. Connect one end of a PC data cable to the
maintenance port connector on the switchplate
(see Figure 4-1). To access this connector, you may
need to remove the switchplate from the mounting
surface. Connect the other end to the serial port on
the PC (a 9-pin/25-pin connector adapter may be
needed for some PCs).
4-6
A Guide to TracVision LF/SF
Most terminal emulation programs
have a parameter for local
character echo. Select this
parameter to see what is being
typed without any system delay.
Figure 4-2
PC Data Cable DB9 Connector
Figure 4-1
Switchplate Maintenance Port
Maintenance Port
(DB9 Connector)