CATV System for High Speed Data
2-way services support:
- Replace 1-way amplifiers with diplexors
- RF front-end divides each direction into 6 MHz channels (digital)
Downstream Transmission
- Amplify 550-750 MHz frequencies
- Downstream modulation (64 QAM) yields ~ 30Mbps
- Downstream signal level variability & attenuation is small
Upstream Channel is shared