Method for measuring crossview between two channels in a wired t

Details Method for measuring crossview between two channels in a wired t Method for measuring crossview between two channels in a wired t

1978-05-31

1981-01-20

Griffin, Robert L.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358 86, 370 6, 375 10, 375 36, H04N 702

Patent

active

042466083

ABSTRACT:
A method for measuring crossview between channels in a wired television broadcasting system is described in which a pseudo random binary pulse sequence signal is applied to a first channel, and the signal on a second channel is correlated with an identical sequence to provide an output representative of the crossview between the first and second channels. This enables crossview measurements to be easily made without interrupting television signals on the channels. The pseudo random binary pulse sequence signal may be applied directly to the first channel or modulated on a carrier for application to the first channel.

REFERENCES:
patent: 2987586 (1961-06-01), Berger
patent: 3278676 (1966-10-01), Becker
patent: 3715508 (1973-02-01), Blasbalg
patent: 3720789 (1973-03-01), Clark
patent: 3735266 (1973-05-01), Amitay
patent: 3891805 (1975-06-01), Flanagan et al.
patent: 4061881 (1977-12-01), Widl
Measurement of Digital Crosstalk and Behavior of PCM Regenerators against Interference Electrical Comm., vol. 47, #4, 1972, pp. 293, 294.
Jacobsen--Cable, Crosstalk Limits on Low Capacity PCM Systems Elec. Comm., vol. 48, #1 and 2, pp. 98-107.
McKenzie--Automated Television Waveform Measurement by use of Digital Computer--Jour. Smpte.-vol. 83-pp. 702-707, 1974.

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