Digital transmitter simulator

Details Digital transmitter simulator Digital transmitter simulator

1984-03-30

1985-09-24

Pinkham, Richard C.

Education and demonstration

Radio navigation

Simulated radio signal generated by use of data storage means

434219, 375 10, G09B 900, H04L 704

Patent

active

045430667

ABSTRACT:
A modulated VLF signal source has the capability for providing radio sign suitable for performance testing and operator training relative to VLF digital data receiving systems. A number of separately proven components are utilized to implement a relatively low cost, reliable compact and easily transportable system. A digital modulator is driven through suitably adapted microprocessor circuits by selective information stored on floppy diskettes. Operator input commands actuate the modulator to generate representations of data in the continuous shift keying, frequency shift keying, or minimum shift keying output modes to provide a modulated VLF output which can be received by several receive systems. Prolonged data transmissions can be produced by merely selecting the appropriate floppy diskettes to initiate the desired modulated sequences.

REFERENCES:
patent: 3004350 (1961-10-01), Marret et al.
patent: 3743754 (1973-07-01), Elsenberg
patent: 3982244 (1976-09-01), Ward
patent: 3987374 (1976-10-01), Jones, Jr.
patent: 4134217 (1979-01-01), Neilson
patent: 4167821 (1979-09-01), Gibson, Jr.
patent: 4258436 (1981-03-01), Campbell
patent: 4290140 (1981-09-01), Malm
patent: 4311466 (1982-01-01), Carpenter

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