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AFC
- Usado para
- automatic frequency control
- Definição1
- Automatic frequency control (AFC) tuning. The AFC tuning ensures that the local oscillator will follow a change in transmitter frequency (within limits) so that the receiver will continue optimum operation. The AFC may be checked by viewing the IF output signal and slightly detuning the magnetron to each side of its optimum position. The AFC circuits should produce a corresponding shift in the local oscillator so that no effect is noted in the IF output. The extent of detuning that the AFC will follow depends on the equipment design and the criteria given in the manufacturer’s instructions.
- Fonte1
- INTERNATIONAL CIVIL AVIATION ORGANIZATION. Manual on testing of radio navigation aids: volume 1: testing of ground-based radio navigation systems. 5. ed. Montreal, 2018. (Doc. 8071).
- Definição2
- 1 Radio receiver which self-compensates for small variations in received signal or local oscillator. 2 By different method, self-governing of a time base.
- Fonte2
- GUNSTON, Bill. The Cambridge aerospace dictionary. Cambridge: Cambridge University, 2004. (Cambridge aerospace series.)
- Fonte3
- INTERNATIONAL CIVIL AVIATION ORGANIZATION. Annex 10 to the Convention on International Civil Aviation: aeronautical telecommunications: volume 1: radio navigation aids. 6th ed. Montreal, 2006. (Annex 10).
- Contexto
- The dynamic range of the automatic frequency control should also consider the frequency-stability error budget of the aircraft VHF data broadcast receiver.