CATV two-way system frequency division configuration diagram

5-8MHz status monitoring, business communication
8-22MHz digital TV backhaul
22-30MHz return analog TV
30-65MHz interactive data service
65-87MHz isolation band
87-108MHz FM broadcast (low-end included business communication band)
111-566MHz Downlink Analog TV
566-670MHz downlink digital TV
670-750MHz dedicated channel for data transmission, transmitting interactive data services. This frequency-splitting configuration is suitable for large-scale integrated service networks. The upstream channel extends 35 MHz from 5-30MHz, which provides the possibility for interactive services. For use, it also provides the frequency space of 104MHz downlink digital compressed TV, and can transmit about 120 sets of digital compressed TV programs, creating conditions for providing NVOD services; at the highest end, there is 80MHz bandwidth for interactive data services.

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