Arrangement for deriving a local clock in a packet cable...

Details Arrangement for deriving a local clock in a packet cable... Arrangement for deriving a local clock in a packet cable...

2005-10-18

2005-10-18

Ho, Duc (Department: 2665)

Multiplex communications

Communication techniques for information carried in plural...

Combining or distributing information via time channels

C375S373000

Reexamination Certificate

active

06956873

ABSTRACT:
A broadband terminal interface unit for use in an HFC communication network includes a phase-locked loop for providing a smooth transition between a CMTS-provided “national” clock and a local clock when the CMTS clock is lost (or before it is required). By controlling the tracking range of the PLL, the sensitivity of the circuit is controlled so that some drift in the national clock can be accommodated without unnecessarily reducing the performance of the components within the broadband terminal interface unit.

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