Abstract: In a digital data transmission system, a unique character marks the beginning of a data message. The speed at which that character is transmitted is sensed and the receiver speed set accordingly through the provision of a counter to count successive one-state bits in a constant speed dibit carrier for the unique character. A decoder responds to particular dibit counts to set speed latches corresponding to the speed at which the character was transmitted.
Type:
Grant
Filed:
June 9, 1975
Date of Patent:
January 4, 1977
Assignee:
International Business Machines Corporation
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