Coherent Techniques for Automatic Direction Finder.
Abstract
Analytical work was extended to cover the effects of noise in a linear phase-lock process. The averaged phase detector output was shown to deteriorate from a sawtooth shape toward a sinusoidal shape with increasing noise-to-signal ratio. Corroborative test data were recorded. The construction of an interim (pending authorization and development time for a frequency synthesizer) substitute oscillator for the receiver with sufficient stability to phase lock on 1f signals with narrow bandwidth was completed successfully. The oscillator is a modified Collins 70E-7A, offset to the frequency of the AN/ARN-89 local oscillator. Frequency drift was found to be less than 0.1 Hz per second after several minutes warmup. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Aug 01, 1968
- Accession Number
- AD0842741
Entities
People
- J. J. Battistelli
- L. J. Perper
- R. A. Hessemer