3
Operation
The TracVision SA system is easy to use. Antenna unit
initialization and satellite acquisition is automatic and does not
require any operator intervention.
To use the TracVision SA system, the vehicle must be stationary.
Once the vehicle is parked:
1. Turn on the IRD and the television.
2. Apply operating power to the antenna unit.
Refer to your IRD user manual for complete operating
instructions for the IRD.
A clear line of sight to the satellite helps ensure that the antenna
can acquire and track the satellite.
The system carries out a number of automated steps at startup.
For reference, these steps are outlined in Table 3-1.
Step
Actions
Antenna Unit Initialization
The microprocessor circuitry does a
basic self-test of the hardware and
software associated with the
antenna unit.
IRD Identification
The microprocessor next queries
the IRD to determine whether it is a
DIRECTV or DISH Network IRD.
Based on the IRD type, the system
will then set various system
variables to ensure that the correct
satellite is found during Search
Mode.
Satellite RF Threshold
The antenna is pointed at the north,
south, east and west horizons to
determine the background noise
level and to calculate the minimum
signal level required for satellite
acquisition.
Satellite Search Modes
The system design includes three
search modes to acquire the
satellite.
Search Mode 1
The antenna makes three complete
revolutions at the saved elevation.
3-1
Operation
54-0149 Rev. D
As part of the startup process, the
TracVision SA system will default to
Channel 200, a program directory.
This is the system’s means of
verifying that it has identified and is
tracking the correct satellite.
Once Channel 200 appears, wait at
least another 30 seconds before
changing the channel to ensure
that the system has completed its
startup routine.
Table 3-1
TracVision SA Automated
Procedures
