Pulse or digital communications – Repeaters – Testing
Patent
1984-12-21
1986-08-12
Bookbinder, Marc E.
Pulse or digital communications
Repeaters
Testing
375 55, 307360, 360 44, H03K 5153, H03M 512
Patent
active
046060529
ABSTRACT:
A signal pre-processing method for detecting valid Manchester-encoded activity on a line carrying Manchester-encoded data signals to an inexpensive Manchester-decoding receiver. Detection is provided by monitoring both a positive-level presence and a negative-level presence to determine whether the received Manchester-encoded signal exceeds a predetermined positive voltage or falls below a predetermined negative voltage. Following detection of such line activity, the received signal is determined to be validly Manchester-encoded if it first crosses a predetermined positive level or a predetermined negative level after having first previously crossed the opposite level within a time interval of 3/4 to 11/4 of the inter-bit period of the received data signals.
REFERENCES:
patent: 3836956 (1974-09-01), Cross
patent: 4142065 (1979-02-01), Tannhauser
Hirzel Frederic J.
Levy Roy J.
Advanced Micro Devices , Inc.
Bookbinder Marc E.
King Patrick T.
Salomon Kenneth B.
Telesz Jr. Andrew J.
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