Patent ID: 7668153

Claim:
A communication system comprising: a host unit comprising: a first module having a first oscillator configured to generate a first master clock signal having an amplitude-to-noise floor ratio that is insufficient to achieve a desired jitter level; and a plurality of second modules coupled to the first module to receive the first master clock signal, each of the plurality of second modules having a first filter to filter the first master clock signal such that the amplitude-to-noise floor ratio is increased sufficiently to achieve the desired jitter level, and a first converter configured to use the filtered first master clock signal rather than a clock signal generated in the respective second module in converting between analog and digital signals; a transport mechanism; and at least one remote unit distributed in a coverage area, the at least one remote unit communicatively coupled to the host unit via the transport mechanism, wherein the at least one remote unit comprises: a third module having a second oscillator configured to generate a second master clock signal having an amplitude-to-noise floor ratio that is insufficient to achieve the desired jitter level; and a plurality of fourth modules coupled to the third module to receive the second master clock signal, each of the plurality of fourth modules having a second filter to filter the second master clock signal such that the amplitude-to-noise floor ratio is increased sufficiently to achieve the desired jitter level, and a second converter configured to use the filtered second master clock signal rather than a clock signal generated in the respective fourth module in converting between analog and digital signals.