Wave transmission lines and networks – Pilot current-controlled systems
Patent
1977-11-23
1980-05-06
Gensler, Paul L.
Wave transmission lines and networks
Pilot current-controlled systems
179170A, 333 18, 375 11, 375 36, H04B 310
Patent
active
042019591
ABSTRACT:
In a long line transmission system, the signal level at the transmission station is pre-equalized by the value L.sub.s which is adjustable according to the signal level at the receiving station. The receiving station equalizes the received signal to the standard level at the output of the receiving station. The difference between the actual level L.sub.r at the input of the receiving station and the standard level there, is fed back to the transmission station through a return transmission line, and said difference is utilized to adjust the pre-equalization value L.sub.s at the transmission station. The ratio L.sub.s /L.sub.r is controlled to be constant by the operation of the pre-equalization level distributor installed at the transmission station.
REFERENCES:
patent: 3177429 (1965-04-01), Markl
patent: 4028644 (1977-06-01), Niiro
Hermes et al., Level Regulation, A Decisive Feature of Coaxial Line Equipment, Philips Telecommunication Review, vol. 30, No. 1, Dec. 1971.
Niiro Yasuhiko
Wakabayashi Hiroharu
Gensler Paul L.
Kokusai Denshin Denwa Co. Ltd.
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