COBHAM SAILOR 800 VSAT Field Replacement Procedure
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COBHAM SAILOR 800 VSAT Field Replacement Procedure

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Field Replacement Procedure

Brief Summary:

Troubleshooting document for inspecting and replacing the BUC on the SAILOR 800 antenna.

Theory of Operation:

The BUC converts the L-band Intermediate Frequency (IF) up to Ku-band radio signal, and amplifies it to transmit
power level. It receives transmit signal and power from VIM.
Troubleshooting:
TX Test SAILOR 800
Following legal entities are trading as / doing business as Cobham SATCOM
Thrane and Thrane A/S, Kgs. Lyngby, Denmark
Sea Tel Inc., Concord USA
TracStar Systems Inc., Orlando, USA
Omnipless Manufacturing (Pty) Limited, Cape Town, RSA
SAILOR 800 VSAT – 6W BUC replacement procedure
Cobham SATCOM
Global Customer Service dept.
Document no.: 97-149715-A
Revision: A
Date: 10-12-2015
www.cobham.com/satcom

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Summary of Contents for COBHAM SAILOR 800 VSAT

  • Page 1 It receives transmit signal and power from VIM. Troubleshooting: TX Test SAILOR 800 Following legal entities are trading as / doing business as Cobham SATCOM Thrane and Thrane A/S, Kgs. Lyngby, Denmark Sea Tel Inc., Concord USA www.cobham.com/satcom TracStar Systems Inc., Orlando, USA...
  • Page 2 6: Above will be performed 5 times. (Cable calibration is done using 5 different frq’s.) 7: After the calibration has been performed, take a note of the “Attenuator margin” 8: Attenuator margin: Max cable loss: 20db. Att margin: 11db. Actual “worst case” cable loss: 20db – 11db = 9db Page 2 of 6 www.cobham.com/satcom...
  • Page 3 9: On the dash board see that “BUC output power” increases along with the increased modem output. 10: The 1 db compression point is normal in the area of -10 to -5 dbm output form the modem. Page 3 of 6 www.cobham.com/satcom...
  • Page 4 (left) and X-pol (right). 9. Disconnect the N-type transmit connector. 10. Remove the four 4mm Allen screws to free the cable spool attached to the PMM, using the 4mm Allen key. Let the cable spool hang freely. Page 4 of 6 www.cobham.com/satcom...
  • Page 5 17. Slide the BUC to the right to free it from the Polarisation Unit. 18. Disconnect the N-type transmit cable from the BUC. 19. To install a replacement BUC follow the instructions above in reverse order. 20. power up the SAILOR vsat. Page 5 of 6 www.cobham.com/satcom...
  • Page 6 7. Verify the system completed the initialization process correctly and that no errors were flagged by the POST. 8: Finally run a cable calibration. Verify that the cable calibration can be performed successful. That will both calibrate the TX part and verify that the SAILOR vsat can transmit. Page 6 of 6 www.cobham.com/satcom...

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