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Doppler VHF Omnidirectional Range (DVOR)Equipment Course 40261


This seven-day course provides training for technicians on the Second Generation VOR modified to Doppler Cardion DME, Type FA-9996. The course is 40% Academy lecture and 60% Academy laboratory. Lecture subjects include break-down of Doppler drawer, antennas, and transmitter and monitor screens. Laboratory subjects include screens, alignments, adjustments, preventive maintenance, and fault isolation.


Given the Manufacturer’s Instruction Book TI-6820.2 (MIB), the FAA Maintenance Order 6820.7B, appropriate test equipment, FAA Academy Instruction Manuals, and an FA-9996 system, the participant will be able to, in accordance with the MIB and the FAA Maintenance Order:
  • Identify the DVOR system layout and reference designations.
  • Perform equipment performance checks and adjustment and alignment procedures.
  • Perform corrective maintenance and restoration procedures.


This course provides training for electronic technicians and engineers progress-ing into technical positions having responsibility for operating, maintaining, and certifying/verifying normal operation of Navigational Aids.

Prerequisites: 47701, (CBI) Second Generation VORTAC Hardware

40284, Navigation System Concepts


  • Conventional VOR Review
  • FM Review, Doppler Theory
  • Doppler VOR Screens
  • Sideband Generator and Control
  • Sideband Amplifier
  • Blending Function Generator
  • Fault Isolation
  • Antenna Fault
  • Monitor Detection
  • Distributor Unit
  • Schematics and Switch Banks
  • Troubleshooting

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