Facsimile and radio teletype broadcast signal decoder

Details Facsimile and radio teletype broadcast signal decoder Facsimile and radio teletype broadcast signal decoder

1987-03-31

1988-06-07

Schreyer, Stafford D.

Telegraphy

Systems

Automatic

H04L 2104

Patent

active

047498250

ABSTRACT:
A method and apparatus are provided for decoding both radio facsimile and radio teletype broadcast signals. A zero crossing detector detects zero crossings of the broadcast signal and generates a pulse with each zero crossing. A time interval is determined between the detected zero crossings. The determined time interval is compared with a plurality of predetermined threshold values for generating a first decoded signal. The first decoded signal is utilized for generating a print signal. The print signal is applied to a conventional printer for generating both the facsimile chart and teletype message.

REFERENCES:
patent: 4243836 (1981-01-01), Scharfe

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