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B
If the TAS unit is powered on but communications have not been established,
ensure that the computer's COM port is connected to the TAS unit's RS-232
diagnostics port. If the computer has more than one COM port, determine which
one is connected and check TASDiag COM port properties.
Select "Bore Sight Top Antenna" or "Bore Sight Bottom Antenna" from
the "Config Mod" menu.
Select the "Ramp Tester with Target altitude at 50,000" radio button
and click OK. The procedure will take a few seconds to complete
The procedure is successful if "Antenna Calculations Complete" is dis-
played in the pop-up message box.
Click OK to close the message box.
If the procedure is unsuccessful, one of the following errors will be
reported:
Rev 3, August/2002
A. "Bore Sight Failed. Cable calibration failed"
Cable calibration occurs automatically during normal operation. If
the unit is unable to complete the cable calibration, then a bore sight
calibration will not be performed. Check cable connections from TAS
to the antenna. Check TAS fault LED to verify that there are no fatal
failures and retry the procedure.
B. "Bore Sight Failed The bearing of the reply is outside of the Bore
Sight Window."
If too many target bearing readings are outside the ± 45° window,
then the bore sight will fail. Check antenna orientation. Check Ramp
Tester placement and retry the procedure.
C. "Bore Sight Failed. The power of the received reply is below the
Bore Sight power minimum."
This error is reported when the power level of the Ramp Tester
replies is too low to accurately determine the bearing. Check the
Ramp Tester set up and retry the procedure.
10609I03 CDL
NOTE
KMH 880/KTA 870
Page 4-39
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