Transmitter modulated with three modulation patterns

Details Transmitter modulated with three modulation patterns Transmitter modulated with three modulation patterns

1976-11-26

1978-07-25

Griffin, Robert L.

Communications: radio wave antennas

Antennas

Balanced doublet - centerfed

325139, 343225, 340365R, H04B 104

Patent

active

041032381

ABSTRACT:
An encoding transmitter is disclosed which includes a modulator providing a means to modulate a carrier wave selectively with a first or a second modulation frequency or pattern to provide first and second modulation patterns respectively. Also a third modulation pattern may be established by providing successive portions of the first modulation frequency and the second modulation frequency during a given time period. A data selector is controlled by data select control signals which are obtained from a counter counting from the first modulation frequency signal. Programmable means include a multi-position switch to program the input channels of the data selector so as to control whether the first or the third modulation pattern is that which modulates the carrier wave during any given unit of time.

REFERENCES:
patent: 3403381 (1968-09-01), Haner
patent: 3510777 (1970-05-01), Gordon
patent: 3648174 (1972-03-01), Fukata
patent: 3731200 (1973-05-01), Schwendeman et al.
patent: 3835454 (1974-09-01), Palmieri et al.
patent: 3906348 (1975-09-01), Willmott
patent: 4005428 (1977-01-01), Graham

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