Fail-safe CATV system center facility

Details Fail-safe CATV system center facility Fail-safe CATV system center facility

1981-12-11

1984-01-24

Orsino, Jr., Joseph A.

Facsimile and static presentation processing

Static presentation processing

Attribute control

455 3, 455 5, 455 8, H04N 710

Patent

active

044279957

ABSTRACT:
A fail-safe CATV system center facility in which abnormalities in a normal down-data signal transmitter are automatically corrected for so that there is no loss of reception at the terminal units. FM and AM detectors detect the presence or absence of the normal FSK data signal. The outputs of the FM and AM detectors are AND'ed together then delayed to control the switch state of a switch which selects between the outputs of the normal down data signal transmitter and a back-up transmitter for coupling through to the cable system. The back-up transmitter produces a clock signal which is obtained by modulating a carrier signal having the same frequency as that of the normal down data signal, preferably a frequency shift keyed signal.

REFERENCES:
patent: 2699495 (1955-01-01), Magnuski et al.
patent: 3639686 (1972-02-01), Walker et al.
patent: 3869564 (1975-03-01), Colody
patent: 4156847 (1979-05-01), Tazawa et al.

Affiliated with

Also associated with

Rating

Fail-safe CATV system center facility does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Fail-safe CATV system center facility, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Fail-safe CATV system center facility will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1290307