Accession Number : ADD010903

Title :   Telemetry Receiver having Remote Tuning Capability.

Descriptive Note : Patent Application,


Personal Author(s) : Cooper,P ; Hill,E P ; Beno,L A ; Stone,R E

Report Date : 06 Jan 1984

Pagination or Media Count : 17

Abstract : A telemetry receiver having remote tuning capability and a direct coupled video output. A VHF reference of the desired frequency is synthesized in a programmable closed loop around a varactor tuned oscillator. The VHF reference is fed back through programmable frequency dividers and referenced to a crystal controlled oscillator to adjust the frequency of the varactor tuned oscillator to the desired frequency. The synthesized VHF reference in then coupled to one port of a double balanced mixer which has the received RF signal as its other input. The output of the balanced mixer is converted to IF and fed to an AM/FM demodulator to provide AM and FM signal outputs.

Descriptors :   *Patent applications, *Telemetering receivers, *Tuned circuits, *Voltage controlled oscillators, *Varactor diodes, Crystal oscillators, Coupling(Interaction), Video signals, Frequency dividers, Closed loop systems, Ports(Openings), Frequency modulation, Very high frequency, Demodulators, Signals, Control, Amplitude modulation, Integrators, Oscillators, Synthesis, Radiofrequency, Output, Airborne

Subject Categories : Electrical and Electronic Equipment

Distribution Statement : APPROVED FOR PUBLIC RELEASE