Circuit for indicating antenna signal input level on television

Details Circuit for indicating antenna signal input level on television Circuit for indicating antenna signal input level on television

1979-03-19

1980-07-22

Griffin, Robert L.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

3581921, 358183, H04N 550

Patent

active

042142733

ABSTRACT:
A circuit for use in a television receiver to obtain a variable-length bar on the television screen which indicates the optimum antenna position, the circuit comprised of at least two monostable multivibrators with input terminals triggered by horizontal and vertical synchronizing pulses and with outputs coupled through an AND circuit to a video/chroma driver amplifier. The pulse length of one of the multivibrators is caused to vary in relation to the strength of an AGC signal in the video signal path of the receiver by coupling the AGC output to the time-constant-determining network of the multivibrator.

REFERENCES:
patent: 3862354 (1975-01-01), Kawamata

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