Pulse or digital communications – Repeaters – Testing
Patent
1989-02-06
1992-03-10
Safourek, Benedict V.
Pulse or digital communications
Repeaters
Testing
375111, 328109, H03D 100, H04L 704
Patent
active
050954989
ABSTRACT:
A digital synchronizer examines a signal transmitted at a predetermined baud rate for a predetermined time. Upon completion of the predetermined time, a decision is made as to whether or not the signal included the predetermined baud rate. If the signal includes the predetermined baud rate, a bit clock is established indicative of the boundaries and center of each baud symbol. The synchronizer samples the signal at a multiple of the baud rate and accumulates the phase relationship between the samples and transitions of the signal during the predetermined time. Upon conclusion of the predetermined time, the distribution of the phase relationships is examined and the presence or absence of signal is determined. If the presence is determined, the bit clock is established.
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DeLuca Joan S.
DeLuca Michael J.
Collopy Daniel R.
Ingrassia Vincent B.
Macnak Philip P.
Motorola Inc.
Safourek Benedict V.
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