Accession Number : ADD012705
Title : Flexible (Multi-Mode) Waveform Generator.
Descriptive Note : Patent,
Corporate Author : DEPARTMENT OF THE AIR FORCE WASHINGTON DC
Personal Author(s) : Goetz,Paul W ; Merley,Kim R
Report Date : 30 Dec 1986
Pagination or Media Count : 8
Abstract : The generation waveforms is accomplished using: two random access memories (RAM), a digital-to-analog converter (DAC), two modulators, two oscillators, and multiplier. The computer inputs a set of digital waveforms and a first control signal into the first RAM which, when directed, conducts them to the DAC. The DAC converts the digital waveform and first control signal to the first modulator. The first modulator produces an output signal by single sideband (SSB) modulating an intermediate frequency carrier from the first oscillator with the analog wave-form when directed to modulate by the first control signal, and outputs the analog waveform otherwise the multiplier increases the bandwidth of signals from the first modulator by multiplying its output signal. The output of the multiplier is received by the second modulator. The second modulator is a biphase modulator which produces an output signal by biphase modulating a radio frequency carrier signal from the second oscillator with the signal from the multiplier when directed to modulate by a second control signal received from the second RAM, and outputting the signal from the multiplier otherwise. (Patents).
Descriptors : *PATENTS, *MODULATORS, *OSCILLATORS, *CARRIER FREQUENCIES, *SINGLE SIDEBAND COMMUNICATIONS, *DIGITAL TO ANALOG CONVERTERS, *WAVEFORM GENERATORS, *RANDOM ACCESS COMPUTER STORAGE, INTERMEDIATE FREQUENCIES, MODULATION, OUTPUT, RADIO SIGNALS, RADIOFREQUENCY, SIGNALS, SINGLE SIDEBAND COMMUNICATIONS, WAVEFORM GENERATORS, WAVEFORMS, ANALOG SYSTEMS, BANDWIDTH, CONTROL
Subject Categories : Electrical and Electronic Equipment
Distribution Statement : APPROVED FOR PUBLIC RELEASE