A note on the design of baseband AFC discriminators
Abstract
An AFC is often used to provide rough frequency information. This may be applied in cases where rapid acquisition of a phase locked loop is desired or rough Doppler information is valuable. This note discusses the design of the filters used to implement the baseband discriminators. It is shown that a significant reduction in the frequency error may be obtained by increasing the number of poles in the discriminator arm filters. Finally, frequency pushing or refusal to lock is discussed for certain discriminator characteristics.
- Publication:
-
NTC 1980; National Telecommunications Conference, Volume 2
- Pub Date:
- 1980
- Bibcode:
- 1980ntc.....2R..24B
- Keywords:
-
- Automatic Frequency Control;
- Error Analysis;
- Frequency Discriminators;
- Frequency Measurement;
- Phase Locked Systems;
- Continuous Radiation;
- Doppler Effect;
- Instrument Errors;
- Transfer Functions;
- Variance (Statistics);
- Electronics and Electrical Engineering