Facsimile and static presentation processing – Facsimile – Specific signal processing circuitry
Patent
1985-05-30
1986-11-18
Groody, James J.
Facsimile and static presentation processing
Facsimile
Specific signal processing circuitry
358186, 358198, 370 691, 370 37, 455293, 333 21A, 333135, 343771, H04N 704, H04N 538, H04J 515
Patent
active
046239219
ABSTRACT:
A television broadcasting system uses an antenna diplexer to combine signals generated from visual and aural power amplifiers. The diplexer comprises first and second hybrids coupled together by transmission lines which have aural-frequency cavities for reflecting aural energy from an aural input port to an antenna output port of the second hybrid. In the event that the visual power amplifier fails, it is desirable to revert to multiplexed operation, in which the aural power amplifier amplifies a combined visual and aural signal. This mode of operation is accomplished by combining the low-level aural signal with the low-level visual signal, by putting the combined visual-with-aural multiplexed signal through the aural power amplifier, and by simultaneously shorting the transmission lines between the second hybrid and the aural cavities.
REFERENCES:
patent: 4240155 (1980-12-01), Vaughan
patent: 4310854 (1982-01-01), Baer
patent: 4397037 (1983-08-01), Theriault
patent: 4491871 (1985-01-01), Schmitz et al.
patent: 4590479 (1986-05-01), Ben-Dow
Matta Joseph J.
Schmitz Anthony N.
General Signal Corporation
Groody James J.
Hubbard Robert R.
Parker Michael D.
LandOfFree
Antenna diplexer utilizing aural input for visual service does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Antenna diplexer utilizing aural input for visual service, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Antenna diplexer utilizing aural input for visual service will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1620181