7200 TROUBLESHOOTING
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Tracking Receiver fault (Applies to: Systems with TRL Tracking Receivers)
Description: This fault occurs when the TRL tracking receiver detects a fault
(i.e. Local Oscillator fault, Analog input board failure, phase lock
loop failure etc.) within itself.
To Correct: Check the TRL display to find out which internal problem has
caused the fault at the ACU. Should there be defective parts, call
VertexRSI for support.
Tracking Receiver in LOCAL control (Applies to: System with TRL Tracking
Receivers)
Description: This status occurs when the local/remote(LCL/REM) switch is
toggled to the local position on the TRL tracking receiver.
To Correct: If the local/remote switch on the TRL is in the local position (amber
LED lit) then press the local/remote switch again to toggle the
system into remote. If the TRL is already in remote mode (green
LED lit) then check to ensure that the serial port connected to the
SCU is selected, in the TRL software, as the port in control.
Tracking Receiver out of band (Applies to: Systems with TRL Tracking Receivers)
Description: This fault occurs when a non-L-Band frequency is selected in the
ACU for which the TRL tracking receiver does not have a
conversion table already established.
To Correct: A conversion table must be entered into the TRL receiver so it can
recognize the frequency the user is trying to select at the ACU.
Also check to ensure that the frequency entered is within the valid
range of frequencies for which this antenna operates.
Tracking Receiver serial link failure (Applies to: Systems with DTR or TRL Tracking
Receivers)
Description: This fault occurs when the Tracking Receiver serial link is not
configured correctly or is disconnected.
To Correct: Ensure that the cable has not been disconnected on either end. If
the connections are correct then check that the software protocols
in both the Tracking Receiver and the ACU are compatible with
each other (i.e. same baud rate, parity bits, stop bits etc.). Ensure
that the communications driver shell that the ACU is using is set to
proper setting, i.e. “DTR” or "TRL".
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