Accession Number:

AD0842741

Title:

Coherent Techniques for Automatic Direction Finder.

Descriptive Note:

Quarterly progress rept. no. 6, 15 Jan-14 Apr 68,

Corporate Author:

ELECTRO TECHNICAL ANALYSIS CORP TUCSON AZ

Report Date:

1968-08-01

Pagination or Media Count:

49.0

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 ANARN-89 local oscillator. Frequency drift was found to be less than 0.1 Hz per second after several minutes warmup. Author

Subject Categories:

  • Direction Finding
  • Radio Communications

Distribution Statement:

APPROVED FOR PUBLIC RELEASE