Accession Number : ADD012893

Title :   Remote Transmitter Control System.

Descriptive Note : Patent,

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON DC

Personal Author(s) : Daniel,Richard A

Report Date : 12 Aug 1986

Pagination or Media Count : 6

Abstract : A remote transmitter system including a control station and a remote transmitter station. The control station includes a variable frequency oscillator, a modulator, a parallel to series digital data converter and a DC power supply. The remote transmitter station comprises a power storage circuit, a phase-locked-loop demodulator, a local oscillator, a modulator and a power amplifier. The variable frequency oscillator provides two signals f0 and f1 that are harmonics of each other and are in-phase. These signals modulate the 0's and 1's of digital data that is transmitted along a coaxial cable to the phase-locked-loop demodulator that provides a control signal to the local oscillator and the modulated digital data signal (f0, f1) to the modulator. The local oscillator generates two signals fA and fB, that have a predetermined phase and/or frequency relationship to f0 and f1. The f0 and f1 signals are detected and applied to the modulator as a control signal (D0, D1) that generates a serial input signal (fA, fB) to the power amplifier and represents the binary data. The invention may be used with either phase modulation, or frequency modulation depending upon the design of the local oscillator. The two outputs fA and FB of the modulator can be designed to have any relationship of frequency for frequency modulation or phase for phase modulation. (Patents)

Descriptors :   *PATENTS, *FREQUENCY MODULATION, *LOCAL OSCILLATORS, *CONTROL SYSTEMS, *TRANSMITTERS, *POWER AMPLIFIERS, *REMOTE SYSTEMS, MODULATORS, COAXIAL CABLES, CONTROL, STATIONS, BINARY NOTATION, SIGNALS, DIRECT CURRENT, HARMONICS, POWER, DATA BASES, DATA TRANSMISSION SYSTEMS, DIGITAL SYSTEMS, MODULATION, PHASE MODULATION, OUTPUT, FREQUENCY, OSCILLATORS, VARIABLES, CIRCUITS, STORAGE

Subject Categories : Command, Control and Communications Systems
      Electrical and Electronic Equipment

Distribution Statement : APPROVED FOR PUBLIC RELEASE