| 摘要 |
In a first configuration, circuitry of a fiber node may be configured to modulate an optical carrier by an analog upstream electrical signal received via the electrical network. In a second configuration, the circuitry may be configured to digitize the analog upstream electrical signal to generate a digitized upstream signal, and modulate the optical carrier with the digitized upstream signal. An optical receiver of the fiber node may be configured to convert a downstream optical signal to a downstream electrical signal. In the first configuration, the downstream electrical signal may be a first analog signal and the circuitry may be configured to output the first analog signal into the electrical network. In a third configuration, the downstream electrical signal is a digitized waveform and the circuitry is configured to convert the digitized waveform to a second analog signal and output the second analog signal into the electrical network. |
| 主权项 |
1. A system comprising:
circuitry for use in a fiber node of a hybrid fiber-coaxial network, wherein:
said circuitry comprises an analog-to-digital converter (ADC), an optical receiver, a digital-to-analog converter (DAC), and an optical transmitter comprising a modulator;said circuitry is configured to interface to an optical network via said optical transmitter and said optical receiver and an electrical network via a diplexer coupled to said DAC and said ADC;in a first configuration, said modulator is operable to modulate an optical signal with an analog upstream electrical signal received via said electrical network and said ADC is disabled; andin a second configuration, said circuitry is operable to digitize, via said ADC, said analog upstream electrical signal to generate a digitized upstream signal, and modulate, via said modulator, said optical signal with said digitized upstream signal. |
