Pulse or digital communications – Cable systems and components
Patent
1996-06-28
1998-11-17
Chin, Stephen
Pulse or digital communications
Cable systems and components
375259, 333 171, H04B 300, H04L 2500
Patent
active
058387269
ABSTRACT:
A method is provided for automatically adjusting the output signal level from a transmitting apparatus, in which the transmitting apparatus recognizes the distance to a receiving apparatus and automatically adjusts the signal output level. In a system in which a signal is transmitted from a transmitting apparatus via a coaxial cable to a receiving apparatus, the signal output from the transmitting apparatus is gradually changed, a judgment being made as to whether or not reception of the signal is possible at the receiving apparatus. When this condition is achieved, notification of the condition is made to the transmitting apparatus which when receiving this notification, sets the signal level to the signal level at that time, thereby setting the signal level to the level which is the receiving limit at the receiving apparatus. Thus the signal output level of the transmitting apparatus is set to a signal output level that corresponds to the length of the coaxial cable between the transmitting apparatus and the receiving apparatus.
REFERENCES:
patent: 4151490 (1979-04-01), Bazin
patent: 4392225 (1983-07-01), Wortmann
patent: 5345592 (1994-09-01), Woodmas
Kubo Tsudoi
Nemoto Kenji
Chin Stephen
Deppe Betsy L.
Fujitsu Limited
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