Coherent Detection Kit for ADF Set AN/ARN-83.
Quarterly progress rept. no. 3, 30 Nov 68-28 Feb 69,
ELECTRO TECHNICAL ANALYSIS CORP TUCSON AZ
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During the third quarter the design concepts detailed in the Design Plan and First and Second Quarterly Reports were breadboarded as regards the frequency synthesizer, mechanical and electrical tuning and second intermediate frequency. The 100 Hz reference frequency used in the frequency synthesizer required careful design considerations in the multi-mode frequencyphase detector and subsequent low-pass filtering of the control signal. Automatic mechanical and electrical tuning of the ARN-83 receiver was accomplished on all bands. The method used is quite sophisticated and detailed operation is described in Section II. The use of the mechanicalelectrical tuning in conjunction with automatic bandswitching makes the tuning of the modified ANARN-83 completely automatic. The synthesizer circuitry and reference oscillation is being incorporated in the ANARN-83 Control Unit. Delivery of the GFE ANARN-83 to be modified was requested 25 November 1968. The necessary oscillation, integrated circuits and components for the mod kits have been ordered. The program is substantially on schedule. Author
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