COHERENT TECHNIQUES FOR AUTOMATIC DIRECTION FINDER.

reportActive / Technical Report | Accession Number: AD0838394 | Need Help?

Abstract:

A functional design was formulated for modification of the ANARN-89 ADF set for coherent operation. In this modification, improvements over the ANARN-83 modification include improved acquisition and phase-lock circuitry filtering techniques to reject received modulation at the ADF switching frequency, and carrier positive-identification techniques in transmission and reception. Measurements of the ANARN-89 PEDM receiver showed that specifications were not met by this apparatus. Since extensive changes will be made in the EDM model, detailed measurements were postponed. Theoretical studies were conducted of analog, linlock, and derived-rate rejection phase lock. A construction program was begun of phase lock circuitry for empirical investigation of the principles theoretically investigated, in the presence of noise and interfering signals. Author

Author(s):
Battistelli, J. J. ; Perper, L. J. ; Hessemer, R. A.
Author Organization(s):
ELECTRO TECHNICAL ANALYSIS CORP TUCSON AZ
Descriptive Note:
Quarterly progress rept. no. 4, 15 Jul-14 Oct 67,
Pagination:
0062

Security Markings

DOCUMENT & CONTEXTUAL SUMMARY

Distribution:
Approved For Public Release

RECORD

Collection: TR
Identifying Numbers
Report Number(s):
ECOM-02149-4
Contract/Grant Number(s):
DA-28-043-AMC-02149(E)
Task Number(s):
1E120601A21901
Project Number(s):
DA-1E1-20601-A-219
Monitor Series:
02149-4
 Subject Terms
Joint Capability Areas:
JCA_6.1.3_Switching and Routing
Communities of Interest:
No COI(s) Identified
Descriptor(s):
(*DIRECTION FINDING, AUTOMATIC), RADIO EQUIPMENT, AIRBORNE, PHASE LOCKED SYSTEMS, MODIFICATION KITS, DEMODULATION, THEORY
Field(s)/Group(s):
Direction Finding
Keyword(s):
AN ARN 89, AVIONICS, COHERENT DETECTION, LIGHT OBSERVATION HELICOPTER AVIONICS PACKAGE, LOHAP(LIGHT OBSERVATION HELICOPTER AVIONICS PACKAGE)
Report Date:
1967 Oct 01