Apparatus for detecting a poor facsimile transmission

Details Apparatus for detecting a poor facsimile transmission Apparatus for detecting a poor facsimile transmission

1974-01-30

1976-12-28

Griffin, Robert L.

Facsimile and static presentation processing

Facsimile

Recording apparatus

178DIG12, 358285, H04N 702

Patent

active

040003655

ABSTRACT:
A facsimile receiver which may be acoustically coupled to a telephone transmission line comprises a preamplifier for amplifying frequency modulated signals. The output of the preamplifier is coupled to a demodulator comprising a single shot multivibrator and an average DC voltage detector connected to the output of the multivibrator. The output of the average DC voltage detector is applied to a stylus driver which controls the marking of a copy medium by a stylus. A signal quality detector and an indicator are coupled to the output of the preamplifier to provide an operator with an indication of poor signal reception quality.

REFERENCES:
patent: 3436474 (1969-04-01), Saeger
patent: 3467772 (1969-09-01), Crane
patent: 3820026 (1974-06-01), Messinger

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